Camera.java revision bb85e1ccb83492d3df9f4ce12d45ba3db1428744
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.hardware; 18 19import static android.system.OsConstants.*; 20 21import android.annotation.SdkConstant; 22import android.annotation.SdkConstant.SdkConstantType; 23import android.app.ActivityThread; 24import android.content.Context; 25import android.graphics.ImageFormat; 26import android.graphics.Point; 27import android.graphics.Rect; 28import android.graphics.SurfaceTexture; 29import android.media.IAudioService; 30import android.os.Handler; 31import android.os.IBinder; 32import android.os.Looper; 33import android.os.Message; 34import android.os.RemoteException; 35import android.os.ServiceManager; 36import android.renderscript.Allocation; 37import android.renderscript.Element; 38import android.renderscript.RSIllegalArgumentException; 39import android.renderscript.RenderScript; 40import android.renderscript.Type; 41import android.text.TextUtils; 42import android.util.Log; 43import android.view.Surface; 44import android.view.SurfaceHolder; 45 46import java.io.IOException; 47import java.lang.ref.WeakReference; 48import java.util.ArrayList; 49import java.util.LinkedHashMap; 50import java.util.List; 51 52/** 53 * The Camera class is used to set image capture settings, start/stop preview, 54 * snap pictures, and retrieve frames for encoding for video. This class is a 55 * client for the Camera service, which manages the actual camera hardware. 56 * 57 * <p>To access the device camera, you must declare the 58 * {@link android.Manifest.permission#CAMERA} permission in your Android 59 * Manifest. Also be sure to include the 60 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 61 * manifest element to declare camera features used by your application. 62 * For example, if you use the camera and auto-focus feature, your Manifest 63 * should include the following:</p> 64 * <pre> <uses-permission android:name="android.permission.CAMERA" /> 65 * <uses-feature android:name="android.hardware.camera" /> 66 * <uses-feature android:name="android.hardware.camera.autofocus" /></pre> 67 * 68 * <p>To take pictures with this class, use the following steps:</p> 69 * 70 * <ol> 71 * <li>Obtain an instance of Camera from {@link #open(int)}. 72 * 73 * <li>Get existing (default) settings with {@link #getParameters()}. 74 * 75 * <li>If necessary, modify the returned {@link Camera.Parameters} object and call 76 * {@link #setParameters(Camera.Parameters)}. 77 * 78 * <li>Call {@link #setDisplayOrientation(int)} to ensure correct orientation of preview. 79 * 80 * <li><b>Important</b>: Pass a fully initialized {@link SurfaceHolder} to 81 * {@link #setPreviewDisplay(SurfaceHolder)}. Without a surface, the camera 82 * will be unable to start the preview. 83 * 84 * <li><b>Important</b>: Call {@link #startPreview()} to start updating the 85 * preview surface. Preview must be started before you can take a picture. 86 * 87 * <li>When you want, call {@link #takePicture(Camera.ShutterCallback, 88 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)} to 89 * capture a photo. Wait for the callbacks to provide the actual image data. 90 * 91 * <li>After taking a picture, preview display will have stopped. To take more 92 * photos, call {@link #startPreview()} again first. 93 * 94 * <li>Call {@link #stopPreview()} to stop updating the preview surface. 95 * 96 * <li><b>Important:</b> Call {@link #release()} to release the camera for 97 * use by other applications. Applications should release the camera 98 * immediately in {@link android.app.Activity#onPause()} (and re-{@link #open()} 99 * it in {@link android.app.Activity#onResume()}). 100 * </ol> 101 * 102 * <p>To quickly switch to video recording mode, use these steps:</p> 103 * 104 * <ol> 105 * <li>Obtain and initialize a Camera and start preview as described above. 106 * 107 * <li>Call {@link #unlock()} to allow the media process to access the camera. 108 * 109 * <li>Pass the camera to {@link android.media.MediaRecorder#setCamera(Camera)}. 110 * See {@link android.media.MediaRecorder} information about video recording. 111 * 112 * <li>When finished recording, call {@link #reconnect()} to re-acquire 113 * and re-lock the camera. 114 * 115 * <li>If desired, restart preview and take more photos or videos. 116 * 117 * <li>Call {@link #stopPreview()} and {@link #release()} as described above. 118 * </ol> 119 * 120 * <p>This class is not thread-safe, and is meant for use from one event thread. 121 * Most long-running operations (preview, focus, photo capture, etc) happen 122 * asynchronously and invoke callbacks as necessary. Callbacks will be invoked 123 * on the event thread {@link #open(int)} was called from. This class's methods 124 * must never be called from multiple threads at once.</p> 125 * 126 * <p class="caution"><strong>Caution:</strong> Different Android-powered devices 127 * may have different hardware specifications, such as megapixel ratings and 128 * auto-focus capabilities. In order for your application to be compatible with 129 * more devices, you should not make assumptions about the device camera 130 * specifications.</p> 131 * 132 * <div class="special reference"> 133 * <h3>Developer Guides</h3> 134 * <p>For more information about using cameras, read the 135 * <a href="{@docRoot}guide/topics/media/camera.html">Camera</a> developer guide.</p> 136 * </div> 137 * 138 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 139 * applications. 140 */ 141@Deprecated 142public class Camera { 143 private static final String TAG = "Camera"; 144 145 // These match the enums in frameworks/base/include/camera/Camera.h 146 private static final int CAMERA_MSG_ERROR = 0x001; 147 private static final int CAMERA_MSG_SHUTTER = 0x002; 148 private static final int CAMERA_MSG_FOCUS = 0x004; 149 private static final int CAMERA_MSG_ZOOM = 0x008; 150 private static final int CAMERA_MSG_PREVIEW_FRAME = 0x010; 151 private static final int CAMERA_MSG_VIDEO_FRAME = 0x020; 152 private static final int CAMERA_MSG_POSTVIEW_FRAME = 0x040; 153 private static final int CAMERA_MSG_RAW_IMAGE = 0x080; 154 private static final int CAMERA_MSG_COMPRESSED_IMAGE = 0x100; 155 private static final int CAMERA_MSG_RAW_IMAGE_NOTIFY = 0x200; 156 private static final int CAMERA_MSG_PREVIEW_METADATA = 0x400; 157 private static final int CAMERA_MSG_FOCUS_MOVE = 0x800; 158 159 private long mNativeContext; // accessed by native methods 160 private EventHandler mEventHandler; 161 private ShutterCallback mShutterCallback; 162 private PictureCallback mRawImageCallback; 163 private PictureCallback mJpegCallback; 164 private PreviewCallback mPreviewCallback; 165 private boolean mUsingPreviewAllocation; 166 private PictureCallback mPostviewCallback; 167 private AutoFocusCallback mAutoFocusCallback; 168 private AutoFocusMoveCallback mAutoFocusMoveCallback; 169 private OnZoomChangeListener mZoomListener; 170 private FaceDetectionListener mFaceListener; 171 private ErrorCallback mErrorCallback; 172 private boolean mOneShot; 173 private boolean mWithBuffer; 174 private boolean mFaceDetectionRunning = false; 175 private final Object mAutoFocusCallbackLock = new Object(); 176 177 private static final int NO_ERROR = 0; 178 179 /** 180 * Broadcast Action: A new picture is taken by the camera, and the entry of 181 * the picture has been added to the media store. 182 * {@link android.content.Intent#getData} is URI of the picture. 183 * 184 * <p>In {@link android.os.Build.VERSION_CODES#N Android N} this broadcast was removed, and 185 * applications are recommended to use 186 * {@link android.app.job.JobInfo.Builder JobInfo.Builder}.{@link android.app.job.JobInfo.Builder#addTriggerContentUri} 187 * instead.</p> 188 * 189 * <p>In {@link android.os.Build.VERSION_CODES#O Android O} this broadcast has been brought 190 * back, but only for <em>registered</em> receivers. Apps that are actively running can 191 * again listen to the broadcast if they want an immediate clear signal about a picture 192 * being taken, however anything doing heavy work (or needing to be launched) as a result of 193 * this should still use JobScheduler.</p> 194 */ 195 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 196 public static final String ACTION_NEW_PICTURE = "android.hardware.action.NEW_PICTURE"; 197 198 /** 199 * Broadcast Action: A new video is recorded by the camera, and the entry 200 * of the video has been added to the media store. 201 * {@link android.content.Intent#getData} is URI of the video. 202 * 203 * <p>In {@link android.os.Build.VERSION_CODES#N Android N} this broadcast was removed, and 204 * applications are recommended to use 205 * {@link android.app.job.JobInfo.Builder JobInfo.Builder}.{@link android.app.job.JobInfo.Builder#addTriggerContentUri} 206 * instead.</p> 207 * 208 * <p>In {@link android.os.Build.VERSION_CODES#O Android O} this broadcast has been brought 209 * back, but only for <em>registered</em> receivers. Apps that are actively running can 210 * again listen to the broadcast if they want an immediate clear signal about a video 211 * being taken, however anything doing heavy work (or needing to be launched) as a result of 212 * this should still use JobScheduler.</p> 213 */ 214 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 215 public static final String ACTION_NEW_VIDEO = "android.hardware.action.NEW_VIDEO"; 216 217 /** 218 * Camera HAL device API version 1.0 219 * @hide 220 */ 221 public static final int CAMERA_HAL_API_VERSION_1_0 = 0x100; 222 223 /** 224 * A constant meaning the normal camera connect/open will be used. 225 */ 226 private static final int CAMERA_HAL_API_VERSION_NORMAL_CONNECT = -2; 227 228 /** 229 * Used to indicate HAL version un-specified. 230 */ 231 private static final int CAMERA_HAL_API_VERSION_UNSPECIFIED = -1; 232 233 /** 234 * Hardware face detection. It does not use much CPU. 235 */ 236 private static final int CAMERA_FACE_DETECTION_HW = 0; 237 238 /** 239 * Software face detection. It uses some CPU. 240 */ 241 private static final int CAMERA_FACE_DETECTION_SW = 1; 242 243 /** 244 * Returns the number of physical cameras available on this device. 245 * The return value of this method might change dynamically if the device 246 * supports external cameras and an external camera is connected or 247 * disconnected. 248 * 249 * @return total number of accessible camera devices, or 0 if there are no 250 * cameras or an error was encountered enumerating them. 251 */ 252 public native static int getNumberOfCameras(); 253 254 /** 255 * Returns the information about a particular camera. 256 * If {@link #getNumberOfCameras()} returns N, the valid id is 0 to N-1. 257 * 258 * @throws RuntimeException if an invalid ID is provided, or if there is an 259 * error retrieving the information (generally due to a hardware or other 260 * low-level failure). 261 */ 262 public static void getCameraInfo(int cameraId, CameraInfo cameraInfo) { 263 _getCameraInfo(cameraId, cameraInfo); 264 IBinder b = ServiceManager.getService(Context.AUDIO_SERVICE); 265 IAudioService audioService = IAudioService.Stub.asInterface(b); 266 try { 267 if (audioService.isCameraSoundForced()) { 268 // Only set this when sound is forced; otherwise let native code 269 // decide. 270 cameraInfo.canDisableShutterSound = false; 271 } 272 } catch (RemoteException e) { 273 Log.e(TAG, "Audio service is unavailable for queries"); 274 } 275 } 276 private native static void _getCameraInfo(int cameraId, CameraInfo cameraInfo); 277 278 /** 279 * Information about a camera 280 * 281 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 282 * applications. 283 */ 284 @Deprecated 285 public static class CameraInfo { 286 /** 287 * The facing of the camera is opposite to that of the screen. 288 */ 289 public static final int CAMERA_FACING_BACK = 0; 290 291 /** 292 * The facing of the camera is the same as that of the screen. 293 */ 294 public static final int CAMERA_FACING_FRONT = 1; 295 296 /** 297 * The direction that the camera faces. It should be 298 * CAMERA_FACING_BACK or CAMERA_FACING_FRONT. 299 */ 300 public int facing; 301 302 /** 303 * <p>The orientation of the camera image. The value is the angle that the 304 * camera image needs to be rotated clockwise so it shows correctly on 305 * the display in its natural orientation. It should be 0, 90, 180, or 270.</p> 306 * 307 * <p>For example, suppose a device has a naturally tall screen. The 308 * back-facing camera sensor is mounted in landscape. You are looking at 309 * the screen. If the top side of the camera sensor is aligned with the 310 * right edge of the screen in natural orientation, the value should be 311 * 90. If the top side of a front-facing camera sensor is aligned with 312 * the right of the screen, the value should be 270.</p> 313 * 314 * @see #setDisplayOrientation(int) 315 * @see Parameters#setRotation(int) 316 * @see Parameters#setPreviewSize(int, int) 317 * @see Parameters#setPictureSize(int, int) 318 * @see Parameters#setJpegThumbnailSize(int, int) 319 */ 320 public int orientation; 321 322 /** 323 * <p>Whether the shutter sound can be disabled.</p> 324 * 325 * <p>On some devices, the camera shutter sound cannot be turned off 326 * through {@link #enableShutterSound enableShutterSound}. This field 327 * can be used to determine whether a call to disable the shutter sound 328 * will succeed.</p> 329 * 330 * <p>If this field is set to true, then a call of 331 * {@code enableShutterSound(false)} will be successful. If set to 332 * false, then that call will fail, and the shutter sound will be played 333 * when {@link Camera#takePicture takePicture} is called.</p> 334 */ 335 public boolean canDisableShutterSound; 336 }; 337 338 /** 339 * Creates a new Camera object to access a particular hardware camera. If 340 * the same camera is opened by other applications, this will throw a 341 * RuntimeException. 342 * 343 * <p>You must call {@link #release()} when you are done using the camera, 344 * otherwise it will remain locked and be unavailable to other applications. 345 * 346 * <p>Your application should only have one Camera object active at a time 347 * for a particular hardware camera. 348 * 349 * <p>Callbacks from other methods are delivered to the event loop of the 350 * thread which called open(). If this thread has no event loop, then 351 * callbacks are delivered to the main application event loop. If there 352 * is no main application event loop, callbacks are not delivered. 353 * 354 * <p class="caution"><b>Caution:</b> On some devices, this method may 355 * take a long time to complete. It is best to call this method from a 356 * worker thread (possibly using {@link android.os.AsyncTask}) to avoid 357 * blocking the main application UI thread. 358 * 359 * @param cameraId the hardware camera to access, between 0 and 360 * {@link #getNumberOfCameras()}-1. 361 * @return a new Camera object, connected, locked and ready for use. 362 * @throws RuntimeException if opening the camera fails (for example, if the 363 * camera is in use by another process or device policy manager has 364 * disabled the camera). 365 * @see android.app.admin.DevicePolicyManager#getCameraDisabled(android.content.ComponentName) 366 */ 367 public static Camera open(int cameraId) { 368 return new Camera(cameraId); 369 } 370 371 /** 372 * Creates a new Camera object to access the first back-facing camera on the 373 * device. If the device does not have a back-facing camera, this returns 374 * null. Otherwise acts like the {@link #open(int)} call. 375 * 376 * @return a new Camera object for the first back-facing camera, or null if there is no 377 * backfacing camera 378 * @see #open(int) 379 */ 380 public static Camera open() { 381 int numberOfCameras = getNumberOfCameras(); 382 CameraInfo cameraInfo = new CameraInfo(); 383 for (int i = 0; i < numberOfCameras; i++) { 384 getCameraInfo(i, cameraInfo); 385 if (cameraInfo.facing == CameraInfo.CAMERA_FACING_BACK) { 386 return new Camera(i); 387 } 388 } 389 return null; 390 } 391 392 /** 393 * Creates a new Camera object to access a particular hardware camera with 394 * given hal API version. If the same camera is opened by other applications 395 * or the hal API version is not supported by this device, this will throw a 396 * RuntimeException. 397 * <p> 398 * You must call {@link #release()} when you are done using the camera, 399 * otherwise it will remain locked and be unavailable to other applications. 400 * <p> 401 * Your application should only have one Camera object active at a time for 402 * a particular hardware camera. 403 * <p> 404 * Callbacks from other methods are delivered to the event loop of the 405 * thread which called open(). If this thread has no event loop, then 406 * callbacks are delivered to the main application event loop. If there is 407 * no main application event loop, callbacks are not delivered. 408 * <p class="caution"> 409 * <b>Caution:</b> On some devices, this method may take a long time to 410 * complete. It is best to call this method from a worker thread (possibly 411 * using {@link android.os.AsyncTask}) to avoid blocking the main 412 * application UI thread. 413 * 414 * @param cameraId The hardware camera to access, between 0 and 415 * {@link #getNumberOfCameras()}-1. 416 * @param halVersion The HAL API version this camera device to be opened as. 417 * @return a new Camera object, connected, locked and ready for use. 418 * 419 * @throws IllegalArgumentException if the {@code halVersion} is invalid 420 * 421 * @throws RuntimeException if opening the camera fails (for example, if the 422 * camera is in use by another process or device policy manager has disabled 423 * the camera). 424 * 425 * @see android.app.admin.DevicePolicyManager#getCameraDisabled(android.content.ComponentName) 426 * @see #CAMERA_HAL_API_VERSION_1_0 427 * 428 * @hide 429 */ 430 public static Camera openLegacy(int cameraId, int halVersion) { 431 if (halVersion < CAMERA_HAL_API_VERSION_1_0) { 432 throw new IllegalArgumentException("Invalid HAL version " + halVersion); 433 } 434 435 return new Camera(cameraId, halVersion); 436 } 437 438 /** 439 * Create a legacy camera object. 440 * 441 * @param cameraId The hardware camera to access, between 0 and 442 * {@link #getNumberOfCameras()}-1. 443 * @param halVersion The HAL API version this camera device to be opened as. 444 */ 445 private Camera(int cameraId, int halVersion) { 446 int err = cameraInitVersion(cameraId, halVersion); 447 if (checkInitErrors(err)) { 448 if (err == -EACCES) { 449 throw new RuntimeException("Fail to connect to camera service"); 450 } else if (err == -ENODEV) { 451 throw new RuntimeException("Camera initialization failed"); 452 } else if (err == -ENOSYS) { 453 throw new RuntimeException("Camera initialization failed because some methods" 454 + " are not implemented"); 455 } else if (err == -EOPNOTSUPP) { 456 throw new RuntimeException("Camera initialization failed because the hal" 457 + " version is not supported by this device"); 458 } else if (err == -EINVAL) { 459 throw new RuntimeException("Camera initialization failed because the input" 460 + " arugments are invalid"); 461 } else if (err == -EBUSY) { 462 throw new RuntimeException("Camera initialization failed because the camera" 463 + " device was already opened"); 464 } else if (err == -EUSERS) { 465 throw new RuntimeException("Camera initialization failed because the max" 466 + " number of camera devices were already opened"); 467 } 468 // Should never hit this. 469 throw new RuntimeException("Unknown camera error"); 470 } 471 } 472 473 private int cameraInitVersion(int cameraId, int halVersion) { 474 mShutterCallback = null; 475 mRawImageCallback = null; 476 mJpegCallback = null; 477 mPreviewCallback = null; 478 mPostviewCallback = null; 479 mUsingPreviewAllocation = false; 480 mZoomListener = null; 481 482 Looper looper; 483 if ((looper = Looper.myLooper()) != null) { 484 mEventHandler = new EventHandler(this, looper); 485 } else if ((looper = Looper.getMainLooper()) != null) { 486 mEventHandler = new EventHandler(this, looper); 487 } else { 488 mEventHandler = null; 489 } 490 491 return native_setup(new WeakReference<Camera>(this), cameraId, halVersion, 492 ActivityThread.currentOpPackageName()); 493 } 494 495 private int cameraInitNormal(int cameraId) { 496 return cameraInitVersion(cameraId, CAMERA_HAL_API_VERSION_NORMAL_CONNECT); 497 } 498 499 /** 500 * Connect to the camera service using #connectLegacy 501 * 502 * <p> 503 * This acts the same as normal except that it will return 504 * the detailed error code if open fails instead of 505 * converting everything into {@code NO_INIT}.</p> 506 * 507 * <p>Intended to use by the camera2 shim only, do <i>not</i> use this for other code.</p> 508 * 509 * @return a detailed errno error code, or {@code NO_ERROR} on success 510 * 511 * @hide 512 */ 513 public int cameraInitUnspecified(int cameraId) { 514 return cameraInitVersion(cameraId, CAMERA_HAL_API_VERSION_UNSPECIFIED); 515 } 516 517 /** used by Camera#open, Camera#open(int) */ 518 Camera(int cameraId) { 519 int err = cameraInitNormal(cameraId); 520 if (checkInitErrors(err)) { 521 if (err == -EACCES) { 522 throw new RuntimeException("Fail to connect to camera service"); 523 } else if (err == -ENODEV) { 524 throw new RuntimeException("Camera initialization failed"); 525 } 526 // Should never hit this. 527 throw new RuntimeException("Unknown camera error"); 528 } 529 } 530 531 532 /** 533 * @hide 534 */ 535 public static boolean checkInitErrors(int err) { 536 return err != NO_ERROR; 537 } 538 539 /** 540 * @hide 541 */ 542 public static Camera openUninitialized() { 543 return new Camera(); 544 } 545 546 /** 547 * An empty Camera for testing purpose. 548 */ 549 Camera() { 550 } 551 552 @Override 553 protected void finalize() { 554 release(); 555 } 556 557 private native final int native_setup(Object camera_this, int cameraId, int halVersion, 558 String packageName); 559 560 private native final void native_release(); 561 562 563 /** 564 * Disconnects and releases the Camera object resources. 565 * 566 * <p>You must call this as soon as you're done with the Camera object.</p> 567 */ 568 public final void release() { 569 native_release(); 570 mFaceDetectionRunning = false; 571 } 572 573 /** 574 * Unlocks the camera to allow another process to access it. 575 * Normally, the camera is locked to the process with an active Camera 576 * object until {@link #release()} is called. To allow rapid handoff 577 * between processes, you can call this method to release the camera 578 * temporarily for another process to use; once the other process is done 579 * you can call {@link #reconnect()} to reclaim the camera. 580 * 581 * <p>This must be done before calling 582 * {@link android.media.MediaRecorder#setCamera(Camera)}. This cannot be 583 * called after recording starts. 584 * 585 * <p>If you are not recording video, you probably do not need this method. 586 * 587 * @throws RuntimeException if the camera cannot be unlocked. 588 */ 589 public native final void unlock(); 590 591 /** 592 * Re-locks the camera to prevent other processes from accessing it. 593 * Camera objects are locked by default unless {@link #unlock()} is 594 * called. Normally {@link #reconnect()} is used instead. 595 * 596 * <p>Since API level 14, camera is automatically locked for applications in 597 * {@link android.media.MediaRecorder#start()}. Applications can use the 598 * camera (ex: zoom) after recording starts. There is no need to call this 599 * after recording starts or stops. 600 * 601 * <p>If you are not recording video, you probably do not need this method. 602 * 603 * @throws RuntimeException if the camera cannot be re-locked (for 604 * example, if the camera is still in use by another process). 605 */ 606 public native final void lock(); 607 608 /** 609 * Reconnects to the camera service after another process used it. 610 * After {@link #unlock()} is called, another process may use the 611 * camera; when the process is done, you must reconnect to the camera, 612 * which will re-acquire the lock and allow you to continue using the 613 * camera. 614 * 615 * <p>Since API level 14, camera is automatically locked for applications in 616 * {@link android.media.MediaRecorder#start()}. Applications can use the 617 * camera (ex: zoom) after recording starts. There is no need to call this 618 * after recording starts or stops. 619 * 620 * <p>If you are not recording video, you probably do not need this method. 621 * 622 * @throws IOException if a connection cannot be re-established (for 623 * example, if the camera is still in use by another process). 624 * @throws RuntimeException if release() has been called on this Camera 625 * instance. 626 */ 627 public native final void reconnect() throws IOException; 628 629 /** 630 * Sets the {@link Surface} to be used for live preview. 631 * Either a surface or surface texture is necessary for preview, and 632 * preview is necessary to take pictures. The same surface can be re-set 633 * without harm. Setting a preview surface will un-set any preview surface 634 * texture that was set via {@link #setPreviewTexture}. 635 * 636 * <p>The {@link SurfaceHolder} must already contain a surface when this 637 * method is called. If you are using {@link android.view.SurfaceView}, 638 * you will need to register a {@link SurfaceHolder.Callback} with 639 * {@link SurfaceHolder#addCallback(SurfaceHolder.Callback)} and wait for 640 * {@link SurfaceHolder.Callback#surfaceCreated(SurfaceHolder)} before 641 * calling setPreviewDisplay() or starting preview. 642 * 643 * <p>This method must be called before {@link #startPreview()}. The 644 * one exception is that if the preview surface is not set (or set to null) 645 * before startPreview() is called, then this method may be called once 646 * with a non-null parameter to set the preview surface. (This allows 647 * camera setup and surface creation to happen in parallel, saving time.) 648 * The preview surface may not otherwise change while preview is running. 649 * 650 * @param holder containing the Surface on which to place the preview, 651 * or null to remove the preview surface 652 * @throws IOException if the method fails (for example, if the surface 653 * is unavailable or unsuitable). 654 * @throws RuntimeException if release() has been called on this Camera 655 * instance. 656 */ 657 public final void setPreviewDisplay(SurfaceHolder holder) throws IOException { 658 if (holder != null) { 659 setPreviewSurface(holder.getSurface()); 660 } else { 661 setPreviewSurface((Surface)null); 662 } 663 } 664 665 /** 666 * @hide 667 */ 668 public native final void setPreviewSurface(Surface surface) throws IOException; 669 670 /** 671 * Sets the {@link SurfaceTexture} to be used for live preview. 672 * Either a surface or surface texture is necessary for preview, and 673 * preview is necessary to take pictures. The same surface texture can be 674 * re-set without harm. Setting a preview surface texture will un-set any 675 * preview surface that was set via {@link #setPreviewDisplay}. 676 * 677 * <p>This method must be called before {@link #startPreview()}. The 678 * one exception is that if the preview surface texture is not set (or set 679 * to null) before startPreview() is called, then this method may be called 680 * once with a non-null parameter to set the preview surface. (This allows 681 * camera setup and surface creation to happen in parallel, saving time.) 682 * The preview surface texture may not otherwise change while preview is 683 * running. 684 * 685 * <p>The timestamps provided by {@link SurfaceTexture#getTimestamp()} for a 686 * SurfaceTexture set as the preview texture have an unspecified zero point, 687 * and cannot be directly compared between different cameras or different 688 * instances of the same camera, or across multiple runs of the same 689 * program. 690 * 691 * <p>If you are using the preview data to create video or still images, 692 * strongly consider using {@link android.media.MediaActionSound} to 693 * properly indicate image capture or recording start/stop to the user.</p> 694 * 695 * @see android.media.MediaActionSound 696 * @see android.graphics.SurfaceTexture 697 * @see android.view.TextureView 698 * @param surfaceTexture the {@link SurfaceTexture} to which the preview 699 * images are to be sent or null to remove the current preview surface 700 * texture 701 * @throws IOException if the method fails (for example, if the surface 702 * texture is unavailable or unsuitable). 703 * @throws RuntimeException if release() has been called on this Camera 704 * instance. 705 */ 706 public native final void setPreviewTexture(SurfaceTexture surfaceTexture) throws IOException; 707 708 /** 709 * Callback interface used to deliver copies of preview frames as 710 * they are displayed. 711 * 712 * @see #setPreviewCallback(Camera.PreviewCallback) 713 * @see #setOneShotPreviewCallback(Camera.PreviewCallback) 714 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 715 * @see #startPreview() 716 * 717 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 718 * applications. 719 */ 720 @Deprecated 721 public interface PreviewCallback 722 { 723 /** 724 * Called as preview frames are displayed. This callback is invoked 725 * on the event thread {@link #open(int)} was called from. 726 * 727 * <p>If using the {@link android.graphics.ImageFormat#YV12} format, 728 * refer to the equations in {@link Camera.Parameters#setPreviewFormat} 729 * for the arrangement of the pixel data in the preview callback 730 * buffers. 731 * 732 * @param data the contents of the preview frame in the format defined 733 * by {@link android.graphics.ImageFormat}, which can be queried 734 * with {@link android.hardware.Camera.Parameters#getPreviewFormat()}. 735 * If {@link android.hardware.Camera.Parameters#setPreviewFormat(int)} 736 * is never called, the default will be the YCbCr_420_SP 737 * (NV21) format. 738 * @param camera the Camera service object. 739 */ 740 void onPreviewFrame(byte[] data, Camera camera); 741 }; 742 743 /** 744 * Starts capturing and drawing preview frames to the screen. 745 * Preview will not actually start until a surface is supplied 746 * with {@link #setPreviewDisplay(SurfaceHolder)} or 747 * {@link #setPreviewTexture(SurfaceTexture)}. 748 * 749 * <p>If {@link #setPreviewCallback(Camera.PreviewCallback)}, 750 * {@link #setOneShotPreviewCallback(Camera.PreviewCallback)}, or 751 * {@link #setPreviewCallbackWithBuffer(Camera.PreviewCallback)} were 752 * called, {@link Camera.PreviewCallback#onPreviewFrame(byte[], Camera)} 753 * will be called when preview data becomes available. 754 * 755 * @throws RuntimeException if starting preview fails; usually this would be 756 * because of a hardware or other low-level error, or because release() 757 * has been called on this Camera instance. 758 */ 759 public native final void startPreview(); 760 761 /** 762 * Stops capturing and drawing preview frames to the surface, and 763 * resets the camera for a future call to {@link #startPreview()}. 764 * 765 * @throws RuntimeException if stopping preview fails; usually this would be 766 * because of a hardware or other low-level error, or because release() 767 * has been called on this Camera instance. 768 */ 769 public final void stopPreview() { 770 _stopPreview(); 771 mFaceDetectionRunning = false; 772 773 mShutterCallback = null; 774 mRawImageCallback = null; 775 mPostviewCallback = null; 776 mJpegCallback = null; 777 synchronized (mAutoFocusCallbackLock) { 778 mAutoFocusCallback = null; 779 } 780 mAutoFocusMoveCallback = null; 781 } 782 783 private native final void _stopPreview(); 784 785 /** 786 * Return current preview state. 787 * 788 * FIXME: Unhide before release 789 * @hide 790 */ 791 public native final boolean previewEnabled(); 792 793 /** 794 * <p>Installs a callback to be invoked for every preview frame in addition 795 * to displaying them on the screen. The callback will be repeatedly called 796 * for as long as preview is active. This method can be called at any time, 797 * even while preview is live. Any other preview callbacks are 798 * overridden.</p> 799 * 800 * <p>If you are using the preview data to create video or still images, 801 * strongly consider using {@link android.media.MediaActionSound} to 802 * properly indicate image capture or recording start/stop to the user.</p> 803 * 804 * @param cb a callback object that receives a copy of each preview frame, 805 * or null to stop receiving callbacks. 806 * @throws RuntimeException if release() has been called on this Camera 807 * instance. 808 * @see android.media.MediaActionSound 809 */ 810 public final void setPreviewCallback(PreviewCallback cb) { 811 mPreviewCallback = cb; 812 mOneShot = false; 813 mWithBuffer = false; 814 if (cb != null) { 815 mUsingPreviewAllocation = false; 816 } 817 // Always use one-shot mode. We fake camera preview mode by 818 // doing one-shot preview continuously. 819 setHasPreviewCallback(cb != null, false); 820 } 821 822 /** 823 * <p>Installs a callback to be invoked for the next preview frame in 824 * addition to displaying it on the screen. After one invocation, the 825 * callback is cleared. This method can be called any time, even when 826 * preview is live. Any other preview callbacks are overridden.</p> 827 * 828 * <p>If you are using the preview data to create video or still images, 829 * strongly consider using {@link android.media.MediaActionSound} to 830 * properly indicate image capture or recording start/stop to the user.</p> 831 * 832 * @param cb a callback object that receives a copy of the next preview frame, 833 * or null to stop receiving callbacks. 834 * @throws RuntimeException if release() has been called on this Camera 835 * instance. 836 * @see android.media.MediaActionSound 837 */ 838 public final void setOneShotPreviewCallback(PreviewCallback cb) { 839 mPreviewCallback = cb; 840 mOneShot = true; 841 mWithBuffer = false; 842 if (cb != null) { 843 mUsingPreviewAllocation = false; 844 } 845 setHasPreviewCallback(cb != null, false); 846 } 847 848 private native final void setHasPreviewCallback(boolean installed, boolean manualBuffer); 849 850 /** 851 * <p>Installs a callback to be invoked for every preview frame, using 852 * buffers supplied with {@link #addCallbackBuffer(byte[])}, in addition to 853 * displaying them on the screen. The callback will be repeatedly called 854 * for as long as preview is active and buffers are available. Any other 855 * preview callbacks are overridden.</p> 856 * 857 * <p>The purpose of this method is to improve preview efficiency and frame 858 * rate by allowing preview frame memory reuse. You must call 859 * {@link #addCallbackBuffer(byte[])} at some point -- before or after 860 * calling this method -- or no callbacks will received.</p> 861 * 862 * <p>The buffer queue will be cleared if this method is called with a null 863 * callback, {@link #setPreviewCallback(Camera.PreviewCallback)} is called, 864 * or {@link #setOneShotPreviewCallback(Camera.PreviewCallback)} is 865 * called.</p> 866 * 867 * <p>If you are using the preview data to create video or still images, 868 * strongly consider using {@link android.media.MediaActionSound} to 869 * properly indicate image capture or recording start/stop to the user.</p> 870 * 871 * @param cb a callback object that receives a copy of the preview frame, 872 * or null to stop receiving callbacks and clear the buffer queue. 873 * @throws RuntimeException if release() has been called on this Camera 874 * instance. 875 * @see #addCallbackBuffer(byte[]) 876 * @see android.media.MediaActionSound 877 */ 878 public final void setPreviewCallbackWithBuffer(PreviewCallback cb) { 879 mPreviewCallback = cb; 880 mOneShot = false; 881 mWithBuffer = true; 882 if (cb != null) { 883 mUsingPreviewAllocation = false; 884 } 885 setHasPreviewCallback(cb != null, true); 886 } 887 888 /** 889 * Adds a pre-allocated buffer to the preview callback buffer queue. 890 * Applications can add one or more buffers to the queue. When a preview 891 * frame arrives and there is still at least one available buffer, the 892 * buffer will be used and removed from the queue. Then preview callback is 893 * invoked with the buffer. If a frame arrives and there is no buffer left, 894 * the frame is discarded. Applications should add buffers back when they 895 * finish processing the data in them. 896 * 897 * <p>For formats besides YV12, the size of the buffer is determined by 898 * multiplying the preview image width, height, and bytes per pixel. The 899 * width and height can be read from 900 * {@link Camera.Parameters#getPreviewSize()}. Bytes per pixel can be 901 * computed from {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 902 * 8, using the image format from 903 * {@link Camera.Parameters#getPreviewFormat()}. 904 * 905 * <p>If using the {@link android.graphics.ImageFormat#YV12} format, the 906 * size can be calculated using the equations listed in 907 * {@link Camera.Parameters#setPreviewFormat}. 908 * 909 * <p>This method is only necessary when 910 * {@link #setPreviewCallbackWithBuffer(PreviewCallback)} is used. When 911 * {@link #setPreviewCallback(PreviewCallback)} or 912 * {@link #setOneShotPreviewCallback(PreviewCallback)} are used, buffers 913 * are automatically allocated. When a supplied buffer is too small to 914 * hold the preview frame data, preview callback will return null and 915 * the buffer will be removed from the buffer queue. 916 * 917 * @param callbackBuffer the buffer to add to the queue. The size of the 918 * buffer must match the values described above. 919 * @see #setPreviewCallbackWithBuffer(PreviewCallback) 920 */ 921 public final void addCallbackBuffer(byte[] callbackBuffer) 922 { 923 _addCallbackBuffer(callbackBuffer, CAMERA_MSG_PREVIEW_FRAME); 924 } 925 926 /** 927 * Adds a pre-allocated buffer to the raw image callback buffer queue. 928 * Applications can add one or more buffers to the queue. When a raw image 929 * frame arrives and there is still at least one available buffer, the 930 * buffer will be used to hold the raw image data and removed from the 931 * queue. Then raw image callback is invoked with the buffer. If a raw 932 * image frame arrives but there is no buffer left, the frame is 933 * discarded. Applications should add buffers back when they finish 934 * processing the data in them by calling this method again in order 935 * to avoid running out of raw image callback buffers. 936 * 937 * <p>The size of the buffer is determined by multiplying the raw image 938 * width, height, and bytes per pixel. The width and height can be 939 * read from {@link Camera.Parameters#getPictureSize()}. Bytes per pixel 940 * can be computed from 941 * {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 8, 942 * using the image format from {@link Camera.Parameters#getPreviewFormat()}. 943 * 944 * <p>This method is only necessary when the PictureCallbck for raw image 945 * is used while calling {@link #takePicture(Camera.ShutterCallback, 946 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}. 947 * 948 * <p>Please note that by calling this method, the mode for 949 * application-managed callback buffers is triggered. If this method has 950 * never been called, null will be returned by the raw image callback since 951 * there is no image callback buffer available. Furthermore, When a supplied 952 * buffer is too small to hold the raw image data, raw image callback will 953 * return null and the buffer will be removed from the buffer queue. 954 * 955 * @param callbackBuffer the buffer to add to the raw image callback buffer 956 * queue. The size should be width * height * (bits per pixel) / 8. An 957 * null callbackBuffer will be ignored and won't be added to the queue. 958 * 959 * @see #takePicture(Camera.ShutterCallback, 960 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}. 961 * 962 * {@hide} 963 */ 964 public final void addRawImageCallbackBuffer(byte[] callbackBuffer) 965 { 966 addCallbackBuffer(callbackBuffer, CAMERA_MSG_RAW_IMAGE); 967 } 968 969 private final void addCallbackBuffer(byte[] callbackBuffer, int msgType) 970 { 971 // CAMERA_MSG_VIDEO_FRAME may be allowed in the future. 972 if (msgType != CAMERA_MSG_PREVIEW_FRAME && 973 msgType != CAMERA_MSG_RAW_IMAGE) { 974 throw new IllegalArgumentException( 975 "Unsupported message type: " + msgType); 976 } 977 978 _addCallbackBuffer(callbackBuffer, msgType); 979 } 980 981 private native final void _addCallbackBuffer( 982 byte[] callbackBuffer, int msgType); 983 984 /** 985 * <p>Create a {@link android.renderscript RenderScript} 986 * {@link android.renderscript.Allocation Allocation} to use as a 987 * destination of preview callback frames. Use 988 * {@link #setPreviewCallbackAllocation setPreviewCallbackAllocation} to use 989 * the created Allocation as a destination for camera preview frames.</p> 990 * 991 * <p>The Allocation will be created with a YUV type, and its contents must 992 * be accessed within Renderscript with the {@code rsGetElementAtYuv_*} 993 * accessor methods. Its size will be based on the current 994 * {@link Parameters#getPreviewSize preview size} configured for this 995 * camera.</p> 996 * 997 * @param rs the RenderScript context for this Allocation. 998 * @param usage additional usage flags to set for the Allocation. The usage 999 * flag {@link android.renderscript.Allocation#USAGE_IO_INPUT} will always 1000 * be set on the created Allocation, but additional flags may be provided 1001 * here. 1002 * @return a new YUV-type Allocation with dimensions equal to the current 1003 * preview size. 1004 * @throws RSIllegalArgumentException if the usage flags are not compatible 1005 * with an YUV Allocation. 1006 * @see #setPreviewCallbackAllocation 1007 * @hide 1008 */ 1009 public final Allocation createPreviewAllocation(RenderScript rs, int usage) 1010 throws RSIllegalArgumentException { 1011 Parameters p = getParameters(); 1012 Size previewSize = p.getPreviewSize(); 1013 Type.Builder yuvBuilder = new Type.Builder(rs, 1014 Element.createPixel(rs, 1015 Element.DataType.UNSIGNED_8, 1016 Element.DataKind.PIXEL_YUV)); 1017 // Use YV12 for wide compatibility. Changing this requires also 1018 // adjusting camera service's format selection. 1019 yuvBuilder.setYuvFormat(ImageFormat.YV12); 1020 yuvBuilder.setX(previewSize.width); 1021 yuvBuilder.setY(previewSize.height); 1022 1023 Allocation a = Allocation.createTyped(rs, yuvBuilder.create(), 1024 usage | Allocation.USAGE_IO_INPUT); 1025 1026 return a; 1027 } 1028 1029 /** 1030 * <p>Set an {@link android.renderscript.Allocation Allocation} as the 1031 * target of preview callback data. Use this method for efficient processing 1032 * of camera preview data with RenderScript. The Allocation must be created 1033 * with the {@link #createPreviewAllocation createPreviewAllocation } 1034 * method.</p> 1035 * 1036 * <p>Setting a preview allocation will disable any active preview callbacks 1037 * set by {@link #setPreviewCallback setPreviewCallback} or 1038 * {@link #setPreviewCallbackWithBuffer setPreviewCallbackWithBuffer}, and 1039 * vice versa. Using a preview allocation still requires an active standard 1040 * preview target to be set, either with 1041 * {@link #setPreviewTexture setPreviewTexture} or 1042 * {@link #setPreviewDisplay setPreviewDisplay}.</p> 1043 * 1044 * <p>To be notified when new frames are available to the Allocation, use 1045 * {@link android.renderscript.Allocation#setIoInputNotificationHandler Allocation.setIoInputNotificationHandler}. To 1046 * update the frame currently accessible from the Allocation to the latest 1047 * preview frame, call 1048 * {@link android.renderscript.Allocation#ioReceive Allocation.ioReceive}.</p> 1049 * 1050 * <p>To disable preview into the Allocation, call this method with a 1051 * {@code null} parameter.</p> 1052 * 1053 * <p>Once a preview allocation is set, the preview size set by 1054 * {@link Parameters#setPreviewSize setPreviewSize} cannot be changed. If 1055 * you wish to change the preview size, first remove the preview allocation 1056 * by calling {@code setPreviewCallbackAllocation(null)}, then change the 1057 * preview size, create a new preview Allocation with 1058 * {@link #createPreviewAllocation createPreviewAllocation}, and set it as 1059 * the new preview callback allocation target.</p> 1060 * 1061 * <p>If you are using the preview data to create video or still images, 1062 * strongly consider using {@link android.media.MediaActionSound} to 1063 * properly indicate image capture or recording start/stop to the user.</p> 1064 * 1065 * @param previewAllocation the allocation to use as destination for preview 1066 * @throws IOException if configuring the camera to use the Allocation for 1067 * preview fails. 1068 * @throws IllegalArgumentException if the Allocation's dimensions or other 1069 * parameters don't meet the requirements. 1070 * @see #createPreviewAllocation 1071 * @see #setPreviewCallback 1072 * @see #setPreviewCallbackWithBuffer 1073 * @hide 1074 */ 1075 public final void setPreviewCallbackAllocation(Allocation previewAllocation) 1076 throws IOException { 1077 Surface previewSurface = null; 1078 if (previewAllocation != null) { 1079 Parameters p = getParameters(); 1080 Size previewSize = p.getPreviewSize(); 1081 if (previewSize.width != previewAllocation.getType().getX() || 1082 previewSize.height != previewAllocation.getType().getY()) { 1083 throw new IllegalArgumentException( 1084 "Allocation dimensions don't match preview dimensions: " + 1085 "Allocation is " + 1086 previewAllocation.getType().getX() + 1087 ", " + 1088 previewAllocation.getType().getY() + 1089 ". Preview is " + previewSize.width + ", " + 1090 previewSize.height); 1091 } 1092 if ((previewAllocation.getUsage() & 1093 Allocation.USAGE_IO_INPUT) == 0) { 1094 throw new IllegalArgumentException( 1095 "Allocation usage does not include USAGE_IO_INPUT"); 1096 } 1097 if (previewAllocation.getType().getElement().getDataKind() != 1098 Element.DataKind.PIXEL_YUV) { 1099 throw new IllegalArgumentException( 1100 "Allocation is not of a YUV type"); 1101 } 1102 previewSurface = previewAllocation.getSurface(); 1103 mUsingPreviewAllocation = true; 1104 } else { 1105 mUsingPreviewAllocation = false; 1106 } 1107 setPreviewCallbackSurface(previewSurface); 1108 } 1109 1110 private native final void setPreviewCallbackSurface(Surface s); 1111 1112 private class EventHandler extends Handler 1113 { 1114 private final Camera mCamera; 1115 1116 public EventHandler(Camera c, Looper looper) { 1117 super(looper); 1118 mCamera = c; 1119 } 1120 1121 @Override 1122 public void handleMessage(Message msg) { 1123 switch(msg.what) { 1124 case CAMERA_MSG_SHUTTER: 1125 if (mShutterCallback != null) { 1126 mShutterCallback.onShutter(); 1127 } 1128 return; 1129 1130 case CAMERA_MSG_RAW_IMAGE: 1131 if (mRawImageCallback != null) { 1132 mRawImageCallback.onPictureTaken((byte[])msg.obj, mCamera); 1133 } 1134 return; 1135 1136 case CAMERA_MSG_COMPRESSED_IMAGE: 1137 if (mJpegCallback != null) { 1138 mJpegCallback.onPictureTaken((byte[])msg.obj, mCamera); 1139 } 1140 return; 1141 1142 case CAMERA_MSG_PREVIEW_FRAME: 1143 PreviewCallback pCb = mPreviewCallback; 1144 if (pCb != null) { 1145 if (mOneShot) { 1146 // Clear the callback variable before the callback 1147 // in case the app calls setPreviewCallback from 1148 // the callback function 1149 mPreviewCallback = null; 1150 } else if (!mWithBuffer) { 1151 // We're faking the camera preview mode to prevent 1152 // the app from being flooded with preview frames. 1153 // Set to oneshot mode again. 1154 setHasPreviewCallback(true, false); 1155 } 1156 pCb.onPreviewFrame((byte[])msg.obj, mCamera); 1157 } 1158 return; 1159 1160 case CAMERA_MSG_POSTVIEW_FRAME: 1161 if (mPostviewCallback != null) { 1162 mPostviewCallback.onPictureTaken((byte[])msg.obj, mCamera); 1163 } 1164 return; 1165 1166 case CAMERA_MSG_FOCUS: 1167 AutoFocusCallback cb = null; 1168 synchronized (mAutoFocusCallbackLock) { 1169 cb = mAutoFocusCallback; 1170 } 1171 if (cb != null) { 1172 boolean success = msg.arg1 == 0 ? false : true; 1173 cb.onAutoFocus(success, mCamera); 1174 } 1175 return; 1176 1177 case CAMERA_MSG_ZOOM: 1178 if (mZoomListener != null) { 1179 mZoomListener.onZoomChange(msg.arg1, msg.arg2 != 0, mCamera); 1180 } 1181 return; 1182 1183 case CAMERA_MSG_PREVIEW_METADATA: 1184 if (mFaceListener != null) { 1185 mFaceListener.onFaceDetection((Face[])msg.obj, mCamera); 1186 } 1187 return; 1188 1189 case CAMERA_MSG_ERROR : 1190 Log.e(TAG, "Error " + msg.arg1); 1191 if (mErrorCallback != null) { 1192 mErrorCallback.onError(msg.arg1, mCamera); 1193 } 1194 return; 1195 1196 case CAMERA_MSG_FOCUS_MOVE: 1197 if (mAutoFocusMoveCallback != null) { 1198 mAutoFocusMoveCallback.onAutoFocusMoving(msg.arg1 == 0 ? false : true, mCamera); 1199 } 1200 return; 1201 1202 default: 1203 Log.e(TAG, "Unknown message type " + msg.what); 1204 return; 1205 } 1206 } 1207 } 1208 1209 private static void postEventFromNative(Object camera_ref, 1210 int what, int arg1, int arg2, Object obj) 1211 { 1212 Camera c = (Camera)((WeakReference)camera_ref).get(); 1213 if (c == null) 1214 return; 1215 1216 if (c.mEventHandler != null) { 1217 Message m = c.mEventHandler.obtainMessage(what, arg1, arg2, obj); 1218 c.mEventHandler.sendMessage(m); 1219 } 1220 } 1221 1222 /** 1223 * Callback interface used to notify on completion of camera auto focus. 1224 * 1225 * <p>Devices that do not support auto-focus will receive a "fake" 1226 * callback to this interface. If your application needs auto-focus and 1227 * should not be installed on devices <em>without</em> auto-focus, you must 1228 * declare that your app uses the 1229 * {@code android.hardware.camera.autofocus} feature, in the 1230 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 1231 * manifest element.</p> 1232 * 1233 * @see #autoFocus(AutoFocusCallback) 1234 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1235 * applications. 1236 */ 1237 @Deprecated 1238 public interface AutoFocusCallback 1239 { 1240 /** 1241 * Called when the camera auto focus completes. If the camera 1242 * does not support auto-focus and autoFocus is called, 1243 * onAutoFocus will be called immediately with a fake value of 1244 * <code>success</code> set to <code>true</code>. 1245 * 1246 * The auto-focus routine does not lock auto-exposure and auto-white 1247 * balance after it completes. 1248 * 1249 * @param success true if focus was successful, false if otherwise 1250 * @param camera the Camera service object 1251 * @see android.hardware.Camera.Parameters#setAutoExposureLock(boolean) 1252 * @see android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean) 1253 */ 1254 void onAutoFocus(boolean success, Camera camera); 1255 } 1256 1257 /** 1258 * Starts camera auto-focus and registers a callback function to run when 1259 * the camera is focused. This method is only valid when preview is active 1260 * (between {@link #startPreview()} and before {@link #stopPreview()}). 1261 * 1262 * <p>Callers should check 1263 * {@link android.hardware.Camera.Parameters#getFocusMode()} to determine if 1264 * this method should be called. If the camera does not support auto-focus, 1265 * it is a no-op and {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} 1266 * callback will be called immediately. 1267 * 1268 * <p>If your application should not be installed 1269 * on devices without auto-focus, you must declare that your application 1270 * uses auto-focus with the 1271 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 1272 * manifest element.</p> 1273 * 1274 * <p>If the current flash mode is not 1275 * {@link android.hardware.Camera.Parameters#FLASH_MODE_OFF}, flash may be 1276 * fired during auto-focus, depending on the driver and camera hardware.<p> 1277 * 1278 * <p>Auto-exposure lock {@link android.hardware.Camera.Parameters#getAutoExposureLock()} 1279 * and auto-white balance locks {@link android.hardware.Camera.Parameters#getAutoWhiteBalanceLock()} 1280 * do not change during and after autofocus. But auto-focus routine may stop 1281 * auto-exposure and auto-white balance transiently during focusing. 1282 * 1283 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 1284 * image capture with {@link #takePicture(Camera.ShutterCallback, 1285 * Camera.PictureCallback, Camera.PictureCallback)}, will not change the 1286 * the focus position. Applications must call cancelAutoFocus to reset the 1287 * focus.</p> 1288 * 1289 * <p>If autofocus is successful, consider using 1290 * {@link android.media.MediaActionSound} to properly play back an autofocus 1291 * success sound to the user.</p> 1292 * 1293 * @param cb the callback to run 1294 * @throws RuntimeException if starting autofocus fails; usually this would 1295 * be because of a hardware or other low-level error, or because 1296 * release() has been called on this Camera instance. 1297 * @see #cancelAutoFocus() 1298 * @see android.hardware.Camera.Parameters#setAutoExposureLock(boolean) 1299 * @see android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean) 1300 * @see android.media.MediaActionSound 1301 */ 1302 public final void autoFocus(AutoFocusCallback cb) 1303 { 1304 synchronized (mAutoFocusCallbackLock) { 1305 mAutoFocusCallback = cb; 1306 } 1307 native_autoFocus(); 1308 } 1309 private native final void native_autoFocus(); 1310 1311 /** 1312 * Cancels any auto-focus function in progress. 1313 * Whether or not auto-focus is currently in progress, 1314 * this function will return the focus position to the default. 1315 * If the camera does not support auto-focus, this is a no-op. 1316 * 1317 * @throws RuntimeException if canceling autofocus fails; usually this would 1318 * be because of a hardware or other low-level error, or because 1319 * release() has been called on this Camera instance. 1320 * @see #autoFocus(Camera.AutoFocusCallback) 1321 */ 1322 public final void cancelAutoFocus() 1323 { 1324 synchronized (mAutoFocusCallbackLock) { 1325 mAutoFocusCallback = null; 1326 } 1327 native_cancelAutoFocus(); 1328 // CAMERA_MSG_FOCUS should be removed here because the following 1329 // scenario can happen: 1330 // - An application uses the same thread for autoFocus, cancelAutoFocus 1331 // and looper thread. 1332 // - The application calls autoFocus. 1333 // - HAL sends CAMERA_MSG_FOCUS, which enters the looper message queue. 1334 // Before event handler's handleMessage() is invoked, the application 1335 // calls cancelAutoFocus and autoFocus. 1336 // - The application gets the old CAMERA_MSG_FOCUS and thinks autofocus 1337 // has been completed. But in fact it is not. 1338 // 1339 // As documented in the beginning of the file, apps should not use 1340 // multiple threads to call autoFocus and cancelAutoFocus at the same 1341 // time. It is HAL's responsibility not to send a CAMERA_MSG_FOCUS 1342 // message after native_cancelAutoFocus is called. 1343 mEventHandler.removeMessages(CAMERA_MSG_FOCUS); 1344 } 1345 private native final void native_cancelAutoFocus(); 1346 1347 /** 1348 * Callback interface used to notify on auto focus start and stop. 1349 * 1350 * <p>This is only supported in continuous autofocus modes -- {@link 1351 * Parameters#FOCUS_MODE_CONTINUOUS_VIDEO} and {@link 1352 * Parameters#FOCUS_MODE_CONTINUOUS_PICTURE}. Applications can show 1353 * autofocus animation based on this.</p> 1354 * 1355 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1356 * applications. 1357 */ 1358 @Deprecated 1359 public interface AutoFocusMoveCallback 1360 { 1361 /** 1362 * Called when the camera auto focus starts or stops. 1363 * 1364 * @param start true if focus starts to move, false if focus stops to move 1365 * @param camera the Camera service object 1366 */ 1367 void onAutoFocusMoving(boolean start, Camera camera); 1368 } 1369 1370 /** 1371 * Sets camera auto-focus move callback. 1372 * 1373 * @param cb the callback to run 1374 * @throws RuntimeException if enabling the focus move callback fails; 1375 * usually this would be because of a hardware or other low-level error, 1376 * or because release() has been called on this Camera instance. 1377 */ 1378 public void setAutoFocusMoveCallback(AutoFocusMoveCallback cb) { 1379 mAutoFocusMoveCallback = cb; 1380 enableFocusMoveCallback((mAutoFocusMoveCallback != null) ? 1 : 0); 1381 } 1382 1383 private native void enableFocusMoveCallback(int enable); 1384 1385 /** 1386 * Callback interface used to signal the moment of actual image capture. 1387 * 1388 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 1389 * 1390 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1391 * applications. 1392 */ 1393 @Deprecated 1394 public interface ShutterCallback 1395 { 1396 /** 1397 * Called as near as possible to the moment when a photo is captured 1398 * from the sensor. This is a good opportunity to play a shutter sound 1399 * or give other feedback of camera operation. This may be some time 1400 * after the photo was triggered, but some time before the actual data 1401 * is available. 1402 */ 1403 void onShutter(); 1404 } 1405 1406 /** 1407 * Callback interface used to supply image data from a photo capture. 1408 * 1409 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 1410 * 1411 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1412 * applications. 1413 */ 1414 @Deprecated 1415 public interface PictureCallback { 1416 /** 1417 * Called when image data is available after a picture is taken. 1418 * The format of the data depends on the context of the callback 1419 * and {@link Camera.Parameters} settings. 1420 * 1421 * @param data a byte array of the picture data 1422 * @param camera the Camera service object 1423 */ 1424 void onPictureTaken(byte[] data, Camera camera); 1425 }; 1426 1427 /** 1428 * Equivalent to <pre>takePicture(Shutter, raw, null, jpeg)</pre>. 1429 * 1430 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 1431 */ 1432 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 1433 PictureCallback jpeg) { 1434 takePicture(shutter, raw, null, jpeg); 1435 } 1436 private native final void native_takePicture(int msgType); 1437 1438 /** 1439 * Triggers an asynchronous image capture. The camera service will initiate 1440 * a series of callbacks to the application as the image capture progresses. 1441 * The shutter callback occurs after the image is captured. This can be used 1442 * to trigger a sound to let the user know that image has been captured. The 1443 * raw callback occurs when the raw image data is available (NOTE: the data 1444 * will be null if there is no raw image callback buffer available or the 1445 * raw image callback buffer is not large enough to hold the raw image). 1446 * The postview callback occurs when a scaled, fully processed postview 1447 * image is available (NOTE: not all hardware supports this). The jpeg 1448 * callback occurs when the compressed image is available. If the 1449 * application does not need a particular callback, a null can be passed 1450 * instead of a callback method. 1451 * 1452 * <p>This method is only valid when preview is active (after 1453 * {@link #startPreview()}). Preview will be stopped after the image is 1454 * taken; callers must call {@link #startPreview()} again if they want to 1455 * re-start preview or take more pictures. This should not be called between 1456 * {@link android.media.MediaRecorder#start()} and 1457 * {@link android.media.MediaRecorder#stop()}. 1458 * 1459 * <p>After calling this method, you must not call {@link #startPreview()} 1460 * or take another picture until the JPEG callback has returned. 1461 * 1462 * @param shutter the callback for image capture moment, or null 1463 * @param raw the callback for raw (uncompressed) image data, or null 1464 * @param postview callback with postview image data, may be null 1465 * @param jpeg the callback for JPEG image data, or null 1466 * @throws RuntimeException if starting picture capture fails; usually this 1467 * would be because of a hardware or other low-level error, or because 1468 * release() has been called on this Camera instance. 1469 */ 1470 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 1471 PictureCallback postview, PictureCallback jpeg) { 1472 mShutterCallback = shutter; 1473 mRawImageCallback = raw; 1474 mPostviewCallback = postview; 1475 mJpegCallback = jpeg; 1476 1477 // If callback is not set, do not send me callbacks. 1478 int msgType = 0; 1479 if (mShutterCallback != null) { 1480 msgType |= CAMERA_MSG_SHUTTER; 1481 } 1482 if (mRawImageCallback != null) { 1483 msgType |= CAMERA_MSG_RAW_IMAGE; 1484 } 1485 if (mPostviewCallback != null) { 1486 msgType |= CAMERA_MSG_POSTVIEW_FRAME; 1487 } 1488 if (mJpegCallback != null) { 1489 msgType |= CAMERA_MSG_COMPRESSED_IMAGE; 1490 } 1491 1492 native_takePicture(msgType); 1493 mFaceDetectionRunning = false; 1494 } 1495 1496 /** 1497 * Zooms to the requested value smoothly. The driver will notify {@link 1498 * OnZoomChangeListener} of the zoom value and whether zoom is stopped at 1499 * the time. For example, suppose the current zoom is 0 and startSmoothZoom 1500 * is called with value 3. The 1501 * {@link Camera.OnZoomChangeListener#onZoomChange(int, boolean, Camera)} 1502 * method will be called three times with zoom values 1, 2, and 3. 1503 * Applications can call {@link #stopSmoothZoom} to stop the zoom earlier. 1504 * Applications should not call startSmoothZoom again or change the zoom 1505 * value before zoom stops. If the supplied zoom value equals to the current 1506 * zoom value, no zoom callback will be generated. This method is supported 1507 * if {@link android.hardware.Camera.Parameters#isSmoothZoomSupported} 1508 * returns true. 1509 * 1510 * @param value zoom value. The valid range is 0 to {@link 1511 * android.hardware.Camera.Parameters#getMaxZoom}. 1512 * @throws IllegalArgumentException if the zoom value is invalid. 1513 * @throws RuntimeException if the method fails. 1514 * @see #setZoomChangeListener(OnZoomChangeListener) 1515 */ 1516 public native final void startSmoothZoom(int value); 1517 1518 /** 1519 * Stops the smooth zoom. Applications should wait for the {@link 1520 * OnZoomChangeListener} to know when the zoom is actually stopped. This 1521 * method is supported if {@link 1522 * android.hardware.Camera.Parameters#isSmoothZoomSupported} is true. 1523 * 1524 * @throws RuntimeException if the method fails. 1525 */ 1526 public native final void stopSmoothZoom(); 1527 1528 /** 1529 * Set the clockwise rotation of preview display in degrees. This affects 1530 * the preview frames and the picture displayed after snapshot. This method 1531 * is useful for portrait mode applications. Note that preview display of 1532 * front-facing cameras is flipped horizontally before the rotation, that 1533 * is, the image is reflected along the central vertical axis of the camera 1534 * sensor. So the users can see themselves as looking into a mirror. 1535 * 1536 * <p>This does not affect the order of byte array passed in {@link 1537 * PreviewCallback#onPreviewFrame}, JPEG pictures, or recorded videos. This 1538 * method is not allowed to be called during preview. 1539 * 1540 * <p>If you want to make the camera image show in the same orientation as 1541 * the display, you can use the following code. 1542 * <pre> 1543 * public static void setCameraDisplayOrientation(Activity activity, 1544 * int cameraId, android.hardware.Camera camera) { 1545 * android.hardware.Camera.CameraInfo info = 1546 * new android.hardware.Camera.CameraInfo(); 1547 * android.hardware.Camera.getCameraInfo(cameraId, info); 1548 * int rotation = activity.getWindowManager().getDefaultDisplay() 1549 * .getRotation(); 1550 * int degrees = 0; 1551 * switch (rotation) { 1552 * case Surface.ROTATION_0: degrees = 0; break; 1553 * case Surface.ROTATION_90: degrees = 90; break; 1554 * case Surface.ROTATION_180: degrees = 180; break; 1555 * case Surface.ROTATION_270: degrees = 270; break; 1556 * } 1557 * 1558 * int result; 1559 * if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) { 1560 * result = (info.orientation + degrees) % 360; 1561 * result = (360 - result) % 360; // compensate the mirror 1562 * } else { // back-facing 1563 * result = (info.orientation - degrees + 360) % 360; 1564 * } 1565 * camera.setDisplayOrientation(result); 1566 * } 1567 * </pre> 1568 * 1569 * <p>Starting from API level 14, this method can be called when preview is 1570 * active. 1571 * 1572 * <p><b>Note: </b>Before API level 24, the default value for orientation is 0. Starting in 1573 * API level 24, the default orientation will be such that applications in forced-landscape mode 1574 * will have correct preview orientation, which may be either a default of 0 or 1575 * 180. Applications that operate in portrait mode or allow for changing orientation must still 1576 * call this method after each orientation change to ensure correct preview display in all 1577 * cases.</p> 1578 * 1579 * @param degrees the angle that the picture will be rotated clockwise. 1580 * Valid values are 0, 90, 180, and 270. 1581 * @throws RuntimeException if setting orientation fails; usually this would 1582 * be because of a hardware or other low-level error, or because 1583 * release() has been called on this Camera instance. 1584 * @see #setPreviewDisplay(SurfaceHolder) 1585 */ 1586 public native final void setDisplayOrientation(int degrees); 1587 1588 /** 1589 * <p>Enable or disable the default shutter sound when taking a picture.</p> 1590 * 1591 * <p>By default, the camera plays the system-defined camera shutter sound 1592 * when {@link #takePicture} is called. Using this method, the shutter sound 1593 * can be disabled. It is strongly recommended that an alternative shutter 1594 * sound is played in the {@link ShutterCallback} when the system shutter 1595 * sound is disabled.</p> 1596 * 1597 * <p>Note that devices may not always allow disabling the camera shutter 1598 * sound. If the shutter sound state cannot be set to the desired value, 1599 * this method will return false. {@link CameraInfo#canDisableShutterSound} 1600 * can be used to determine whether the device will allow the shutter sound 1601 * to be disabled.</p> 1602 * 1603 * @param enabled whether the camera should play the system shutter sound 1604 * when {@link #takePicture takePicture} is called. 1605 * @return {@code true} if the shutter sound state was successfully 1606 * changed. {@code false} if the shutter sound state could not be 1607 * changed. {@code true} is also returned if shutter sound playback 1608 * is already set to the requested state. 1609 * @throws RuntimeException if the call fails; usually this would be because 1610 * of a hardware or other low-level error, or because release() has been 1611 * called on this Camera instance. 1612 * @see #takePicture 1613 * @see CameraInfo#canDisableShutterSound 1614 * @see ShutterCallback 1615 */ 1616 public final boolean enableShutterSound(boolean enabled) { 1617 if (!enabled) { 1618 IBinder b = ServiceManager.getService(Context.AUDIO_SERVICE); 1619 IAudioService audioService = IAudioService.Stub.asInterface(b); 1620 try { 1621 if (audioService.isCameraSoundForced()) return false; 1622 } catch (RemoteException e) { 1623 Log.e(TAG, "Audio service is unavailable for queries"); 1624 } 1625 } 1626 return _enableShutterSound(enabled); 1627 } 1628 1629 /** 1630 * Disable the shutter sound unconditionally. 1631 * 1632 * <p> 1633 * This is only guaranteed to work for legacy cameras 1634 * (i.e. initialized with {@link #cameraInitUnspecified}). Trying to call this on 1635 * a regular camera will force a conditional check in the camera service. 1636 * </p> 1637 * 1638 * @return {@code true} if the shutter sound state was successfully 1639 * changed. {@code false} if the shutter sound state could not be 1640 * changed. {@code true} is also returned if shutter sound playback 1641 * is already set to the requested state. 1642 * 1643 * @hide 1644 */ 1645 public final boolean disableShutterSound() { 1646 return _enableShutterSound(/*enabled*/false); 1647 } 1648 1649 private native final boolean _enableShutterSound(boolean enabled); 1650 1651 /** 1652 * Callback interface for zoom changes during a smooth zoom operation. 1653 * 1654 * @see #setZoomChangeListener(OnZoomChangeListener) 1655 * @see #startSmoothZoom(int) 1656 * 1657 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1658 * applications. 1659 */ 1660 @Deprecated 1661 public interface OnZoomChangeListener 1662 { 1663 /** 1664 * Called when the zoom value has changed during a smooth zoom. 1665 * 1666 * @param zoomValue the current zoom value. In smooth zoom mode, camera 1667 * calls this for every new zoom value. 1668 * @param stopped whether smooth zoom is stopped. If the value is true, 1669 * this is the last zoom update for the application. 1670 * @param camera the Camera service object 1671 */ 1672 void onZoomChange(int zoomValue, boolean stopped, Camera camera); 1673 }; 1674 1675 /** 1676 * Registers a listener to be notified when the zoom value is updated by the 1677 * camera driver during smooth zoom. 1678 * 1679 * @param listener the listener to notify 1680 * @see #startSmoothZoom(int) 1681 */ 1682 public final void setZoomChangeListener(OnZoomChangeListener listener) 1683 { 1684 mZoomListener = listener; 1685 } 1686 1687 /** 1688 * Callback interface for face detected in the preview frame. 1689 * 1690 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1691 * applications. 1692 */ 1693 @Deprecated 1694 public interface FaceDetectionListener 1695 { 1696 /** 1697 * Notify the listener of the detected faces in the preview frame. 1698 * 1699 * @param faces The detected faces in a list 1700 * @param camera The {@link Camera} service object 1701 */ 1702 void onFaceDetection(Face[] faces, Camera camera); 1703 } 1704 1705 /** 1706 * Registers a listener to be notified about the faces detected in the 1707 * preview frame. 1708 * 1709 * @param listener the listener to notify 1710 * @see #startFaceDetection() 1711 */ 1712 public final void setFaceDetectionListener(FaceDetectionListener listener) 1713 { 1714 mFaceListener = listener; 1715 } 1716 1717 /** 1718 * Starts the face detection. This should be called after preview is started. 1719 * The camera will notify {@link FaceDetectionListener} of the detected 1720 * faces in the preview frame. The detected faces may be the same as the 1721 * previous ones. Applications should call {@link #stopFaceDetection} to 1722 * stop the face detection. This method is supported if {@link 1723 * Parameters#getMaxNumDetectedFaces()} returns a number larger than 0. 1724 * If the face detection has started, apps should not call this again. 1725 * 1726 * <p>When the face detection is running, {@link Parameters#setWhiteBalance(String)}, 1727 * {@link Parameters#setFocusAreas(List)}, and {@link Parameters#setMeteringAreas(List)} 1728 * have no effect. The camera uses the detected faces to do auto-white balance, 1729 * auto exposure, and autofocus. 1730 * 1731 * <p>If the apps call {@link #autoFocus(AutoFocusCallback)}, the camera 1732 * will stop sending face callbacks. The last face callback indicates the 1733 * areas used to do autofocus. After focus completes, face detection will 1734 * resume sending face callbacks. If the apps call {@link 1735 * #cancelAutoFocus()}, the face callbacks will also resume.</p> 1736 * 1737 * <p>After calling {@link #takePicture(Camera.ShutterCallback, Camera.PictureCallback, 1738 * Camera.PictureCallback)} or {@link #stopPreview()}, and then resuming 1739 * preview with {@link #startPreview()}, the apps should call this method 1740 * again to resume face detection.</p> 1741 * 1742 * @throws IllegalArgumentException if the face detection is unsupported. 1743 * @throws RuntimeException if the method fails or the face detection is 1744 * already running. 1745 * @see FaceDetectionListener 1746 * @see #stopFaceDetection() 1747 * @see Parameters#getMaxNumDetectedFaces() 1748 */ 1749 public final void startFaceDetection() { 1750 if (mFaceDetectionRunning) { 1751 throw new RuntimeException("Face detection is already running"); 1752 } 1753 _startFaceDetection(CAMERA_FACE_DETECTION_HW); 1754 mFaceDetectionRunning = true; 1755 } 1756 1757 /** 1758 * Stops the face detection. 1759 * 1760 * @see #startFaceDetection() 1761 */ 1762 public final void stopFaceDetection() { 1763 _stopFaceDetection(); 1764 mFaceDetectionRunning = false; 1765 } 1766 1767 private native final void _startFaceDetection(int type); 1768 private native final void _stopFaceDetection(); 1769 1770 /** 1771 * Information about a face identified through camera face detection. 1772 * 1773 * <p>When face detection is used with a camera, the {@link FaceDetectionListener} returns a 1774 * list of face objects for use in focusing and metering.</p> 1775 * 1776 * @see FaceDetectionListener 1777 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1778 * applications. 1779 */ 1780 @Deprecated 1781 public static class Face { 1782 /** 1783 * Create an empty face. 1784 */ 1785 public Face() { 1786 } 1787 1788 /** 1789 * Bounds of the face. (-1000, -1000) represents the top-left of the 1790 * camera field of view, and (1000, 1000) represents the bottom-right of 1791 * the field of view. For example, suppose the size of the viewfinder UI 1792 * is 800x480. The rect passed from the driver is (-1000, -1000, 0, 0). 1793 * The corresponding viewfinder rect should be (0, 0, 400, 240). It is 1794 * guaranteed left < right and top < bottom. The coordinates can be 1795 * smaller than -1000 or bigger than 1000. But at least one vertex will 1796 * be within (-1000, -1000) and (1000, 1000). 1797 * 1798 * <p>The direction is relative to the sensor orientation, that is, what 1799 * the sensor sees. The direction is not affected by the rotation or 1800 * mirroring of {@link #setDisplayOrientation(int)}. The face bounding 1801 * rectangle does not provide any information about face orientation.</p> 1802 * 1803 * <p>Here is the matrix to convert driver coordinates to View coordinates 1804 * in pixels.</p> 1805 * <pre> 1806 * Matrix matrix = new Matrix(); 1807 * CameraInfo info = CameraHolder.instance().getCameraInfo()[cameraId]; 1808 * // Need mirror for front camera. 1809 * boolean mirror = (info.facing == CameraInfo.CAMERA_FACING_FRONT); 1810 * matrix.setScale(mirror ? -1 : 1, 1); 1811 * // This is the value for android.hardware.Camera.setDisplayOrientation. 1812 * matrix.postRotate(displayOrientation); 1813 * // Camera driver coordinates range from (-1000, -1000) to (1000, 1000). 1814 * // UI coordinates range from (0, 0) to (width, height). 1815 * matrix.postScale(view.getWidth() / 2000f, view.getHeight() / 2000f); 1816 * matrix.postTranslate(view.getWidth() / 2f, view.getHeight() / 2f); 1817 * </pre> 1818 * 1819 * @see #startFaceDetection() 1820 */ 1821 public Rect rect; 1822 1823 /** 1824 * <p>The confidence level for the detection of the face. The range is 1 to 1825 * 100. 100 is the highest confidence.</p> 1826 * 1827 * <p>Depending on the device, even very low-confidence faces may be 1828 * listed, so applications should filter out faces with low confidence, 1829 * depending on the use case. For a typical point-and-shoot camera 1830 * application that wishes to display rectangles around detected faces, 1831 * filtering out faces with confidence less than 50 is recommended.</p> 1832 * 1833 * @see #startFaceDetection() 1834 */ 1835 public int score; 1836 1837 /** 1838 * An unique id per face while the face is visible to the tracker. If 1839 * the face leaves the field-of-view and comes back, it will get a new 1840 * id. This is an optional field, may not be supported on all devices. 1841 * If not supported, id will always be set to -1. The optional fields 1842 * are supported as a set. Either they are all valid, or none of them 1843 * are. 1844 */ 1845 public int id = -1; 1846 1847 /** 1848 * The coordinates of the center of the left eye. The coordinates are in 1849 * the same space as the ones for {@link #rect}. This is an optional 1850 * field, may not be supported on all devices. If not supported, the 1851 * value will always be set to null. The optional fields are supported 1852 * as a set. Either they are all valid, or none of them are. 1853 */ 1854 public Point leftEye = null; 1855 1856 /** 1857 * The coordinates of the center of the right eye. The coordinates are 1858 * in the same space as the ones for {@link #rect}.This is an optional 1859 * field, may not be supported on all devices. If not supported, the 1860 * value will always be set to null. The optional fields are supported 1861 * as a set. Either they are all valid, or none of them are. 1862 */ 1863 public Point rightEye = null; 1864 1865 /** 1866 * The coordinates of the center of the mouth. The coordinates are in 1867 * the same space as the ones for {@link #rect}. This is an optional 1868 * field, may not be supported on all devices. If not supported, the 1869 * value will always be set to null. The optional fields are supported 1870 * as a set. Either they are all valid, or none of them are. 1871 */ 1872 public Point mouth = null; 1873 } 1874 1875 /** 1876 * Unspecified camera error. 1877 * @see Camera.ErrorCallback 1878 */ 1879 public static final int CAMERA_ERROR_UNKNOWN = 1; 1880 1881 /** 1882 * Camera was disconnected due to use by higher priority user. 1883 * @see Camera.ErrorCallback 1884 */ 1885 public static final int CAMERA_ERROR_EVICTED = 2; 1886 1887 /** 1888 * Media server died. In this case, the application must release the 1889 * Camera object and instantiate a new one. 1890 * @see Camera.ErrorCallback 1891 */ 1892 public static final int CAMERA_ERROR_SERVER_DIED = 100; 1893 1894 /** 1895 * Callback interface for camera error notification. 1896 * 1897 * @see #setErrorCallback(ErrorCallback) 1898 * 1899 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 1900 * applications. 1901 */ 1902 @Deprecated 1903 public interface ErrorCallback 1904 { 1905 /** 1906 * Callback for camera errors. 1907 * @param error error code: 1908 * <ul> 1909 * <li>{@link #CAMERA_ERROR_UNKNOWN} 1910 * <li>{@link #CAMERA_ERROR_SERVER_DIED} 1911 * </ul> 1912 * @param camera the Camera service object 1913 */ 1914 void onError(int error, Camera camera); 1915 }; 1916 1917 /** 1918 * Registers a callback to be invoked when an error occurs. 1919 * @param cb The callback to run 1920 */ 1921 public final void setErrorCallback(ErrorCallback cb) 1922 { 1923 mErrorCallback = cb; 1924 } 1925 1926 private native final void native_setParameters(String params); 1927 private native final String native_getParameters(); 1928 1929 /** 1930 * Changes the settings for this Camera service. 1931 * 1932 * @param params the Parameters to use for this Camera service 1933 * @throws RuntimeException if any parameter is invalid or not supported. 1934 * @see #getParameters() 1935 */ 1936 public void setParameters(Parameters params) { 1937 // If using preview allocations, don't allow preview size changes 1938 if (mUsingPreviewAllocation) { 1939 Size newPreviewSize = params.getPreviewSize(); 1940 Size currentPreviewSize = getParameters().getPreviewSize(); 1941 if (newPreviewSize.width != currentPreviewSize.width || 1942 newPreviewSize.height != currentPreviewSize.height) { 1943 throw new IllegalStateException("Cannot change preview size" + 1944 " while a preview allocation is configured."); 1945 } 1946 } 1947 1948 native_setParameters(params.flatten()); 1949 } 1950 1951 /** 1952 * Returns the current settings for this Camera service. 1953 * If modifications are made to the returned Parameters, they must be passed 1954 * to {@link #setParameters(Camera.Parameters)} to take effect. 1955 * 1956 * @throws RuntimeException if reading parameters fails; usually this would 1957 * be because of a hardware or other low-level error, or because 1958 * release() has been called on this Camera instance. 1959 * @see #setParameters(Camera.Parameters) 1960 */ 1961 public Parameters getParameters() { 1962 Parameters p = new Parameters(); 1963 String s = native_getParameters(); 1964 p.unflatten(s); 1965 return p; 1966 } 1967 1968 /** 1969 * Returns an empty {@link Parameters} for testing purpose. 1970 * 1971 * @return a Parameter object. 1972 * 1973 * @hide 1974 */ 1975 public static Parameters getEmptyParameters() { 1976 Camera camera = new Camera(); 1977 return camera.new Parameters(); 1978 } 1979 1980 /** 1981 * Returns a copied {@link Parameters}; for shim use only. 1982 * 1983 * @param parameters a non-{@code null} parameters 1984 * @return a Parameter object, with all the parameters copied from {@code parameters}. 1985 * 1986 * @throws NullPointerException if {@code parameters} was {@code null} 1987 * @hide 1988 */ 1989 public static Parameters getParametersCopy(Camera.Parameters parameters) { 1990 if (parameters == null) { 1991 throw new NullPointerException("parameters must not be null"); 1992 } 1993 1994 Camera camera = parameters.getOuter(); 1995 Parameters p = camera.new Parameters(); 1996 p.copyFrom(parameters); 1997 1998 return p; 1999 } 2000 2001 /** 2002 * Image size (width and height dimensions). 2003 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 2004 * applications. 2005 */ 2006 @Deprecated 2007 public class Size { 2008 /** 2009 * Sets the dimensions for pictures. 2010 * 2011 * @param w the photo width (pixels) 2012 * @param h the photo height (pixels) 2013 */ 2014 public Size(int w, int h) { 2015 width = w; 2016 height = h; 2017 } 2018 /** 2019 * Compares {@code obj} to this size. 2020 * 2021 * @param obj the object to compare this size with. 2022 * @return {@code true} if the width and height of {@code obj} is the 2023 * same as those of this size. {@code false} otherwise. 2024 */ 2025 @Override 2026 public boolean equals(Object obj) { 2027 if (!(obj instanceof Size)) { 2028 return false; 2029 } 2030 Size s = (Size) obj; 2031 return width == s.width && height == s.height; 2032 } 2033 @Override 2034 public int hashCode() { 2035 return width * 32713 + height; 2036 } 2037 /** width of the picture */ 2038 public int width; 2039 /** height of the picture */ 2040 public int height; 2041 }; 2042 2043 /** 2044 * <p>The Area class is used for choosing specific metering and focus areas for 2045 * the camera to use when calculating auto-exposure, auto-white balance, and 2046 * auto-focus.</p> 2047 * 2048 * <p>To find out how many simultaneous areas a given camera supports, use 2049 * {@link Parameters#getMaxNumMeteringAreas()} and 2050 * {@link Parameters#getMaxNumFocusAreas()}. If metering or focusing area 2051 * selection is unsupported, these methods will return 0.</p> 2052 * 2053 * <p>Each Area consists of a rectangle specifying its bounds, and a weight 2054 * that determines its importance. The bounds are relative to the camera's 2055 * current field of view. The coordinates are mapped so that (-1000, -1000) 2056 * is always the top-left corner of the current field of view, and (1000, 2057 * 1000) is always the bottom-right corner of the current field of 2058 * view. Setting Areas with bounds outside that range is not allowed. Areas 2059 * with zero or negative width or height are not allowed.</p> 2060 * 2061 * <p>The weight must range from 1 to 1000, and represents a weight for 2062 * every pixel in the area. This means that a large metering area with 2063 * the same weight as a smaller area will have more effect in the 2064 * metering result. Metering areas can overlap and the driver 2065 * will add the weights in the overlap region.</p> 2066 * 2067 * @see Parameters#setFocusAreas(List) 2068 * @see Parameters#getFocusAreas() 2069 * @see Parameters#getMaxNumFocusAreas() 2070 * @see Parameters#setMeteringAreas(List) 2071 * @see Parameters#getMeteringAreas() 2072 * @see Parameters#getMaxNumMeteringAreas() 2073 * 2074 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 2075 * applications. 2076 */ 2077 @Deprecated 2078 public static class Area { 2079 /** 2080 * Create an area with specified rectangle and weight. 2081 * 2082 * @param rect the bounds of the area. 2083 * @param weight the weight of the area. 2084 */ 2085 public Area(Rect rect, int weight) { 2086 this.rect = rect; 2087 this.weight = weight; 2088 } 2089 /** 2090 * Compares {@code obj} to this area. 2091 * 2092 * @param obj the object to compare this area with. 2093 * @return {@code true} if the rectangle and weight of {@code obj} is 2094 * the same as those of this area. {@code false} otherwise. 2095 */ 2096 @Override 2097 public boolean equals(Object obj) { 2098 if (!(obj instanceof Area)) { 2099 return false; 2100 } 2101 Area a = (Area) obj; 2102 if (rect == null) { 2103 if (a.rect != null) return false; 2104 } else { 2105 if (!rect.equals(a.rect)) return false; 2106 } 2107 return weight == a.weight; 2108 } 2109 2110 /** 2111 * Bounds of the area. (-1000, -1000) represents the top-left of the 2112 * camera field of view, and (1000, 1000) represents the bottom-right of 2113 * the field of view. Setting bounds outside that range is not 2114 * allowed. Bounds with zero or negative width or height are not 2115 * allowed. 2116 * 2117 * @see Parameters#getFocusAreas() 2118 * @see Parameters#getMeteringAreas() 2119 */ 2120 public Rect rect; 2121 2122 /** 2123 * Weight of the area. The weight must range from 1 to 1000, and 2124 * represents a weight for every pixel in the area. This means that a 2125 * large metering area with the same weight as a smaller area will have 2126 * more effect in the metering result. Metering areas can overlap and 2127 * the driver will add the weights in the overlap region. 2128 * 2129 * @see Parameters#getFocusAreas() 2130 * @see Parameters#getMeteringAreas() 2131 */ 2132 public int weight; 2133 } 2134 2135 /** 2136 * Camera service settings. 2137 * 2138 * <p>To make camera parameters take effect, applications have to call 2139 * {@link Camera#setParameters(Camera.Parameters)}. For example, after 2140 * {@link Camera.Parameters#setWhiteBalance} is called, white balance is not 2141 * actually changed until {@link Camera#setParameters(Camera.Parameters)} 2142 * is called with the changed parameters object. 2143 * 2144 * <p>Different devices may have different camera capabilities, such as 2145 * picture size or flash modes. The application should query the camera 2146 * capabilities before setting parameters. For example, the application 2147 * should call {@link Camera.Parameters#getSupportedColorEffects()} before 2148 * calling {@link Camera.Parameters#setColorEffect(String)}. If the 2149 * camera does not support color effects, 2150 * {@link Camera.Parameters#getSupportedColorEffects()} will return null. 2151 * 2152 * @deprecated We recommend using the new {@link android.hardware.camera2} API for new 2153 * applications. 2154 */ 2155 @Deprecated 2156 public class Parameters { 2157 // Parameter keys to communicate with the camera driver. 2158 private static final String KEY_PREVIEW_SIZE = "preview-size"; 2159 private static final String KEY_PREVIEW_FORMAT = "preview-format"; 2160 private static final String KEY_PREVIEW_FRAME_RATE = "preview-frame-rate"; 2161 private static final String KEY_PREVIEW_FPS_RANGE = "preview-fps-range"; 2162 private static final String KEY_PICTURE_SIZE = "picture-size"; 2163 private static final String KEY_PICTURE_FORMAT = "picture-format"; 2164 private static final String KEY_JPEG_THUMBNAIL_SIZE = "jpeg-thumbnail-size"; 2165 private static final String KEY_JPEG_THUMBNAIL_WIDTH = "jpeg-thumbnail-width"; 2166 private static final String KEY_JPEG_THUMBNAIL_HEIGHT = "jpeg-thumbnail-height"; 2167 private static final String KEY_JPEG_THUMBNAIL_QUALITY = "jpeg-thumbnail-quality"; 2168 private static final String KEY_JPEG_QUALITY = "jpeg-quality"; 2169 private static final String KEY_ROTATION = "rotation"; 2170 private static final String KEY_GPS_LATITUDE = "gps-latitude"; 2171 private static final String KEY_GPS_LONGITUDE = "gps-longitude"; 2172 private static final String KEY_GPS_ALTITUDE = "gps-altitude"; 2173 private static final String KEY_GPS_TIMESTAMP = "gps-timestamp"; 2174 private static final String KEY_GPS_PROCESSING_METHOD = "gps-processing-method"; 2175 private static final String KEY_WHITE_BALANCE = "whitebalance"; 2176 private static final String KEY_EFFECT = "effect"; 2177 private static final String KEY_ANTIBANDING = "antibanding"; 2178 private static final String KEY_SCENE_MODE = "scene-mode"; 2179 private static final String KEY_FLASH_MODE = "flash-mode"; 2180 private static final String KEY_FOCUS_MODE = "focus-mode"; 2181 private static final String KEY_FOCUS_AREAS = "focus-areas"; 2182 private static final String KEY_MAX_NUM_FOCUS_AREAS = "max-num-focus-areas"; 2183 private static final String KEY_FOCAL_LENGTH = "focal-length"; 2184 private static final String KEY_HORIZONTAL_VIEW_ANGLE = "horizontal-view-angle"; 2185 private static final String KEY_VERTICAL_VIEW_ANGLE = "vertical-view-angle"; 2186 private static final String KEY_EXPOSURE_COMPENSATION = "exposure-compensation"; 2187 private static final String KEY_MAX_EXPOSURE_COMPENSATION = "max-exposure-compensation"; 2188 private static final String KEY_MIN_EXPOSURE_COMPENSATION = "min-exposure-compensation"; 2189 private static final String KEY_EXPOSURE_COMPENSATION_STEP = "exposure-compensation-step"; 2190 private static final String KEY_AUTO_EXPOSURE_LOCK = "auto-exposure-lock"; 2191 private static final String KEY_AUTO_EXPOSURE_LOCK_SUPPORTED = "auto-exposure-lock-supported"; 2192 private static final String KEY_AUTO_WHITEBALANCE_LOCK = "auto-whitebalance-lock"; 2193 private static final String KEY_AUTO_WHITEBALANCE_LOCK_SUPPORTED = "auto-whitebalance-lock-supported"; 2194 private static final String KEY_METERING_AREAS = "metering-areas"; 2195 private static final String KEY_MAX_NUM_METERING_AREAS = "max-num-metering-areas"; 2196 private static final String KEY_ZOOM = "zoom"; 2197 private static final String KEY_MAX_ZOOM = "max-zoom"; 2198 private static final String KEY_ZOOM_RATIOS = "zoom-ratios"; 2199 private static final String KEY_ZOOM_SUPPORTED = "zoom-supported"; 2200 private static final String KEY_SMOOTH_ZOOM_SUPPORTED = "smooth-zoom-supported"; 2201 private static final String KEY_FOCUS_DISTANCES = "focus-distances"; 2202 private static final String KEY_VIDEO_SIZE = "video-size"; 2203 private static final String KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO = 2204 "preferred-preview-size-for-video"; 2205 private static final String KEY_MAX_NUM_DETECTED_FACES_HW = "max-num-detected-faces-hw"; 2206 private static final String KEY_MAX_NUM_DETECTED_FACES_SW = "max-num-detected-faces-sw"; 2207 private static final String KEY_RECORDING_HINT = "recording-hint"; 2208 private static final String KEY_VIDEO_SNAPSHOT_SUPPORTED = "video-snapshot-supported"; 2209 private static final String KEY_VIDEO_STABILIZATION = "video-stabilization"; 2210 private static final String KEY_VIDEO_STABILIZATION_SUPPORTED = "video-stabilization-supported"; 2211 2212 // Parameter key suffix for supported values. 2213 private static final String SUPPORTED_VALUES_SUFFIX = "-values"; 2214 2215 private static final String TRUE = "true"; 2216 private static final String FALSE = "false"; 2217 2218 // Values for white balance settings. 2219 public static final String WHITE_BALANCE_AUTO = "auto"; 2220 public static final String WHITE_BALANCE_INCANDESCENT = "incandescent"; 2221 public static final String WHITE_BALANCE_FLUORESCENT = "fluorescent"; 2222 public static final String WHITE_BALANCE_WARM_FLUORESCENT = "warm-fluorescent"; 2223 public static final String WHITE_BALANCE_DAYLIGHT = "daylight"; 2224 public static final String WHITE_BALANCE_CLOUDY_DAYLIGHT = "cloudy-daylight"; 2225 public static final String WHITE_BALANCE_TWILIGHT = "twilight"; 2226 public static final String WHITE_BALANCE_SHADE = "shade"; 2227 2228 // Values for color effect settings. 2229 public static final String EFFECT_NONE = "none"; 2230 public static final String EFFECT_MONO = "mono"; 2231 public static final String EFFECT_NEGATIVE = "negative"; 2232 public static final String EFFECT_SOLARIZE = "solarize"; 2233 public static final String EFFECT_SEPIA = "sepia"; 2234 public static final String EFFECT_POSTERIZE = "posterize"; 2235 public static final String EFFECT_WHITEBOARD = "whiteboard"; 2236 public static final String EFFECT_BLACKBOARD = "blackboard"; 2237 public static final String EFFECT_AQUA = "aqua"; 2238 2239 // Values for antibanding settings. 2240 public static final String ANTIBANDING_AUTO = "auto"; 2241 public static final String ANTIBANDING_50HZ = "50hz"; 2242 public static final String ANTIBANDING_60HZ = "60hz"; 2243 public static final String ANTIBANDING_OFF = "off"; 2244 2245 // Values for flash mode settings. 2246 /** 2247 * Flash will not be fired. 2248 */ 2249 public static final String FLASH_MODE_OFF = "off"; 2250 2251 /** 2252 * Flash will be fired automatically when required. The flash may be fired 2253 * during preview, auto-focus, or snapshot depending on the driver. 2254 */ 2255 public static final String FLASH_MODE_AUTO = "auto"; 2256 2257 /** 2258 * Flash will always be fired during snapshot. The flash may also be 2259 * fired during preview or auto-focus depending on the driver. 2260 */ 2261 public static final String FLASH_MODE_ON = "on"; 2262 2263 /** 2264 * Flash will be fired in red-eye reduction mode. 2265 */ 2266 public static final String FLASH_MODE_RED_EYE = "red-eye"; 2267 2268 /** 2269 * Constant emission of light during preview, auto-focus and snapshot. 2270 * This can also be used for video recording. 2271 */ 2272 public static final String FLASH_MODE_TORCH = "torch"; 2273 2274 /** 2275 * Scene mode is off. 2276 */ 2277 public static final String SCENE_MODE_AUTO = "auto"; 2278 2279 /** 2280 * Take photos of fast moving objects. Same as {@link 2281 * #SCENE_MODE_SPORTS}. 2282 */ 2283 public static final String SCENE_MODE_ACTION = "action"; 2284 2285 /** 2286 * Take people pictures. 2287 */ 2288 public static final String SCENE_MODE_PORTRAIT = "portrait"; 2289 2290 /** 2291 * Take pictures on distant objects. 2292 */ 2293 public static final String SCENE_MODE_LANDSCAPE = "landscape"; 2294 2295 /** 2296 * Take photos at night. 2297 */ 2298 public static final String SCENE_MODE_NIGHT = "night"; 2299 2300 /** 2301 * Take people pictures at night. 2302 */ 2303 public static final String SCENE_MODE_NIGHT_PORTRAIT = "night-portrait"; 2304 2305 /** 2306 * Take photos in a theater. Flash light is off. 2307 */ 2308 public static final String SCENE_MODE_THEATRE = "theatre"; 2309 2310 /** 2311 * Take pictures on the beach. 2312 */ 2313 public static final String SCENE_MODE_BEACH = "beach"; 2314 2315 /** 2316 * Take pictures on the snow. 2317 */ 2318 public static final String SCENE_MODE_SNOW = "snow"; 2319 2320 /** 2321 * Take sunset photos. 2322 */ 2323 public static final String SCENE_MODE_SUNSET = "sunset"; 2324 2325 /** 2326 * Avoid blurry pictures (for example, due to hand shake). 2327 */ 2328 public static final String SCENE_MODE_STEADYPHOTO = "steadyphoto"; 2329 2330 /** 2331 * For shooting firework displays. 2332 */ 2333 public static final String SCENE_MODE_FIREWORKS = "fireworks"; 2334 2335 /** 2336 * Take photos of fast moving objects. Same as {@link 2337 * #SCENE_MODE_ACTION}. 2338 */ 2339 public static final String SCENE_MODE_SPORTS = "sports"; 2340 2341 /** 2342 * Take indoor low-light shot. 2343 */ 2344 public static final String SCENE_MODE_PARTY = "party"; 2345 2346 /** 2347 * Capture the naturally warm color of scenes lit by candles. 2348 */ 2349 public static final String SCENE_MODE_CANDLELIGHT = "candlelight"; 2350 2351 /** 2352 * Applications are looking for a barcode. Camera driver will be 2353 * optimized for barcode reading. 2354 */ 2355 public static final String SCENE_MODE_BARCODE = "barcode"; 2356 2357 /** 2358 * Capture a scene using high dynamic range imaging techniques. The 2359 * camera will return an image that has an extended dynamic range 2360 * compared to a regular capture. Capturing such an image may take 2361 * longer than a regular capture. 2362 */ 2363 public static final String SCENE_MODE_HDR = "hdr"; 2364 2365 /** 2366 * Auto-focus mode. Applications should call {@link 2367 * #autoFocus(AutoFocusCallback)} to start the focus in this mode. 2368 */ 2369 public static final String FOCUS_MODE_AUTO = "auto"; 2370 2371 /** 2372 * Focus is set at infinity. Applications should not call 2373 * {@link #autoFocus(AutoFocusCallback)} in this mode. 2374 */ 2375 public static final String FOCUS_MODE_INFINITY = "infinity"; 2376 2377 /** 2378 * Macro (close-up) focus mode. Applications should call 2379 * {@link #autoFocus(AutoFocusCallback)} to start the focus in this 2380 * mode. 2381 */ 2382 public static final String FOCUS_MODE_MACRO = "macro"; 2383 2384 /** 2385 * Focus is fixed. The camera is always in this mode if the focus is not 2386 * adjustable. If the camera has auto-focus, this mode can fix the 2387 * focus, which is usually at hyperfocal distance. Applications should 2388 * not call {@link #autoFocus(AutoFocusCallback)} in this mode. 2389 */ 2390 public static final String FOCUS_MODE_FIXED = "fixed"; 2391 2392 /** 2393 * Extended depth of field (EDOF). Focusing is done digitally and 2394 * continuously. Applications should not call {@link 2395 * #autoFocus(AutoFocusCallback)} in this mode. 2396 */ 2397 public static final String FOCUS_MODE_EDOF = "edof"; 2398 2399 /** 2400 * Continuous auto focus mode intended for video recording. The camera 2401 * continuously tries to focus. This is the best choice for video 2402 * recording because the focus changes smoothly . Applications still can 2403 * call {@link #takePicture(Camera.ShutterCallback, 2404 * Camera.PictureCallback, Camera.PictureCallback)} in this mode but the 2405 * subject may not be in focus. Auto focus starts when the parameter is 2406 * set. 2407 * 2408 * <p>Since API level 14, applications can call {@link 2409 * #autoFocus(AutoFocusCallback)} in this mode. The focus callback will 2410 * immediately return with a boolean that indicates whether the focus is 2411 * sharp or not. The focus position is locked after autoFocus call. If 2412 * applications want to resume the continuous focus, cancelAutoFocus 2413 * must be called. Restarting the preview will not resume the continuous 2414 * autofocus. To stop continuous focus, applications should change the 2415 * focus mode to other modes. 2416 * 2417 * @see #FOCUS_MODE_CONTINUOUS_PICTURE 2418 */ 2419 public static final String FOCUS_MODE_CONTINUOUS_VIDEO = "continuous-video"; 2420 2421 /** 2422 * Continuous auto focus mode intended for taking pictures. The camera 2423 * continuously tries to focus. The speed of focus change is more 2424 * aggressive than {@link #FOCUS_MODE_CONTINUOUS_VIDEO}. Auto focus 2425 * starts when the parameter is set. 2426 * 2427 * <p>Applications can call {@link #autoFocus(AutoFocusCallback)} in 2428 * this mode. If the autofocus is in the middle of scanning, the focus 2429 * callback will return when it completes. If the autofocus is not 2430 * scanning, the focus callback will immediately return with a boolean 2431 * that indicates whether the focus is sharp or not. The apps can then 2432 * decide if they want to take a picture immediately or to change the 2433 * focus mode to auto, and run a full autofocus cycle. The focus 2434 * position is locked after autoFocus call. If applications want to 2435 * resume the continuous focus, cancelAutoFocus must be called. 2436 * Restarting the preview will not resume the continuous autofocus. To 2437 * stop continuous focus, applications should change the focus mode to 2438 * other modes. 2439 * 2440 * @see #FOCUS_MODE_CONTINUOUS_VIDEO 2441 */ 2442 public static final String FOCUS_MODE_CONTINUOUS_PICTURE = "continuous-picture"; 2443 2444 // Indices for focus distance array. 2445 /** 2446 * The array index of near focus distance for use with 2447 * {@link #getFocusDistances(float[])}. 2448 */ 2449 public static final int FOCUS_DISTANCE_NEAR_INDEX = 0; 2450 2451 /** 2452 * The array index of optimal focus distance for use with 2453 * {@link #getFocusDistances(float[])}. 2454 */ 2455 public static final int FOCUS_DISTANCE_OPTIMAL_INDEX = 1; 2456 2457 /** 2458 * The array index of far focus distance for use with 2459 * {@link #getFocusDistances(float[])}. 2460 */ 2461 public static final int FOCUS_DISTANCE_FAR_INDEX = 2; 2462 2463 /** 2464 * The array index of minimum preview fps for use with {@link 2465 * #getPreviewFpsRange(int[])} or {@link 2466 * #getSupportedPreviewFpsRange()}. 2467 */ 2468 public static final int PREVIEW_FPS_MIN_INDEX = 0; 2469 2470 /** 2471 * The array index of maximum preview fps for use with {@link 2472 * #getPreviewFpsRange(int[])} or {@link 2473 * #getSupportedPreviewFpsRange()}. 2474 */ 2475 public static final int PREVIEW_FPS_MAX_INDEX = 1; 2476 2477 // Formats for setPreviewFormat and setPictureFormat. 2478 private static final String PIXEL_FORMAT_YUV422SP = "yuv422sp"; 2479 private static final String PIXEL_FORMAT_YUV420SP = "yuv420sp"; 2480 private static final String PIXEL_FORMAT_YUV422I = "yuv422i-yuyv"; 2481 private static final String PIXEL_FORMAT_YUV420P = "yuv420p"; 2482 private static final String PIXEL_FORMAT_RGB565 = "rgb565"; 2483 private static final String PIXEL_FORMAT_JPEG = "jpeg"; 2484 private static final String PIXEL_FORMAT_BAYER_RGGB = "bayer-rggb"; 2485 2486 /** 2487 * Order matters: Keys that are {@link #set(String, String) set} later 2488 * will take precedence over keys that are set earlier (if the two keys 2489 * conflict with each other). 2490 * 2491 * <p>One example is {@link #setPreviewFpsRange(int, int)} , since it 2492 * conflicts with {@link #setPreviewFrameRate(int)} whichever key is set later 2493 * is the one that will take precedence. 2494 * </p> 2495 */ 2496 private final LinkedHashMap<String, String> mMap; 2497 2498 private Parameters() { 2499 mMap = new LinkedHashMap<String, String>(/*initialCapacity*/64); 2500 } 2501 2502 /** 2503 * Overwrite existing parameters with a copy of the ones from {@code other}. 2504 * 2505 * <b>For use by the legacy shim only.</b> 2506 * 2507 * @hide 2508 */ 2509 public void copyFrom(Parameters other) { 2510 if (other == null) { 2511 throw new NullPointerException("other must not be null"); 2512 } 2513 2514 mMap.putAll(other.mMap); 2515 } 2516 2517 private Camera getOuter() { 2518 return Camera.this; 2519 } 2520 2521 2522 /** 2523 * Value equality check. 2524 * 2525 * @hide 2526 */ 2527 public boolean same(Parameters other) { 2528 if (this == other) { 2529 return true; 2530 } 2531 return other != null && Parameters.this.mMap.equals(other.mMap); 2532 } 2533 2534 /** 2535 * Writes the current Parameters to the log. 2536 * @hide 2537 * @deprecated 2538 */ 2539 @Deprecated 2540 public void dump() { 2541 Log.e(TAG, "dump: size=" + mMap.size()); 2542 for (String k : mMap.keySet()) { 2543 Log.e(TAG, "dump: " + k + "=" + mMap.get(k)); 2544 } 2545 } 2546 2547 /** 2548 * Creates a single string with all the parameters set in 2549 * this Parameters object. 2550 * <p>The {@link #unflatten(String)} method does the reverse.</p> 2551 * 2552 * @return a String with all values from this Parameters object, in 2553 * semi-colon delimited key-value pairs 2554 */ 2555 public String flatten() { 2556 StringBuilder flattened = new StringBuilder(128); 2557 for (String k : mMap.keySet()) { 2558 flattened.append(k); 2559 flattened.append("="); 2560 flattened.append(mMap.get(k)); 2561 flattened.append(";"); 2562 } 2563 // chop off the extra semicolon at the end 2564 flattened.deleteCharAt(flattened.length()-1); 2565 return flattened.toString(); 2566 } 2567 2568 /** 2569 * Takes a flattened string of parameters and adds each one to 2570 * this Parameters object. 2571 * <p>The {@link #flatten()} method does the reverse.</p> 2572 * 2573 * @param flattened a String of parameters (key-value paired) that 2574 * are semi-colon delimited 2575 */ 2576 public void unflatten(String flattened) { 2577 mMap.clear(); 2578 2579 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(';'); 2580 splitter.setString(flattened); 2581 for (String kv : splitter) { 2582 int pos = kv.indexOf('='); 2583 if (pos == -1) { 2584 continue; 2585 } 2586 String k = kv.substring(0, pos); 2587 String v = kv.substring(pos + 1); 2588 mMap.put(k, v); 2589 } 2590 } 2591 2592 public void remove(String key) { 2593 mMap.remove(key); 2594 } 2595 2596 /** 2597 * Sets a String parameter. 2598 * 2599 * @param key the key name for the parameter 2600 * @param value the String value of the parameter 2601 */ 2602 public void set(String key, String value) { 2603 if (key.indexOf('=') != -1 || key.indexOf(';') != -1 || key.indexOf(0) != -1) { 2604 Log.e(TAG, "Key \"" + key + "\" contains invalid character (= or ; or \\0)"); 2605 return; 2606 } 2607 if (value.indexOf('=') != -1 || value.indexOf(';') != -1 || value.indexOf(0) != -1) { 2608 Log.e(TAG, "Value \"" + value + "\" contains invalid character (= or ; or \\0)"); 2609 return; 2610 } 2611 2612 put(key, value); 2613 } 2614 2615 /** 2616 * Sets an integer parameter. 2617 * 2618 * @param key the key name for the parameter 2619 * @param value the int value of the parameter 2620 */ 2621 public void set(String key, int value) { 2622 put(key, Integer.toString(value)); 2623 } 2624 2625 private void put(String key, String value) { 2626 /* 2627 * Remove the key if it already exists. 2628 * 2629 * This way setting a new value for an already existing key will always move 2630 * that key to be ordered the latest in the map. 2631 */ 2632 mMap.remove(key); 2633 mMap.put(key, value); 2634 } 2635 2636 private void set(String key, List<Area> areas) { 2637 if (areas == null) { 2638 set(key, "(0,0,0,0,0)"); 2639 } else { 2640 StringBuilder buffer = new StringBuilder(); 2641 for (int i = 0; i < areas.size(); i++) { 2642 Area area = areas.get(i); 2643 Rect rect = area.rect; 2644 buffer.append('('); 2645 buffer.append(rect.left); 2646 buffer.append(','); 2647 buffer.append(rect.top); 2648 buffer.append(','); 2649 buffer.append(rect.right); 2650 buffer.append(','); 2651 buffer.append(rect.bottom); 2652 buffer.append(','); 2653 buffer.append(area.weight); 2654 buffer.append(')'); 2655 if (i != areas.size() - 1) buffer.append(','); 2656 } 2657 set(key, buffer.toString()); 2658 } 2659 } 2660 2661 /** 2662 * Returns the value of a String parameter. 2663 * 2664 * @param key the key name for the parameter 2665 * @return the String value of the parameter 2666 */ 2667 public String get(String key) { 2668 return mMap.get(key); 2669 } 2670 2671 /** 2672 * Returns the value of an integer parameter. 2673 * 2674 * @param key the key name for the parameter 2675 * @return the int value of the parameter 2676 */ 2677 public int getInt(String key) { 2678 return Integer.parseInt(mMap.get(key)); 2679 } 2680 2681 /** 2682 * Sets the dimensions for preview pictures. If the preview has already 2683 * started, applications should stop the preview first before changing 2684 * preview size. 2685 * 2686 * The sides of width and height are based on camera orientation. That 2687 * is, the preview size is the size before it is rotated by display 2688 * orientation. So applications need to consider the display orientation 2689 * while setting preview size. For example, suppose the camera supports 2690 * both 480x320 and 320x480 preview sizes. The application wants a 3:2 2691 * preview ratio. If the display orientation is set to 0 or 180, preview 2692 * size should be set to 480x320. If the display orientation is set to 2693 * 90 or 270, preview size should be set to 320x480. The display 2694 * orientation should also be considered while setting picture size and 2695 * thumbnail size. 2696 * 2697 * @param width the width of the pictures, in pixels 2698 * @param height the height of the pictures, in pixels 2699 * @see #setDisplayOrientation(int) 2700 * @see #getCameraInfo(int, CameraInfo) 2701 * @see #setPictureSize(int, int) 2702 * @see #setJpegThumbnailSize(int, int) 2703 */ 2704 public void setPreviewSize(int width, int height) { 2705 String v = Integer.toString(width) + "x" + Integer.toString(height); 2706 set(KEY_PREVIEW_SIZE, v); 2707 } 2708 2709 /** 2710 * Returns the dimensions setting for preview pictures. 2711 * 2712 * @return a Size object with the width and height setting 2713 * for the preview picture 2714 */ 2715 public Size getPreviewSize() { 2716 String pair = get(KEY_PREVIEW_SIZE); 2717 return strToSize(pair); 2718 } 2719 2720 /** 2721 * Gets the supported preview sizes. 2722 * 2723 * @return a list of Size object. This method will always return a list 2724 * with at least one element. 2725 */ 2726 public List<Size> getSupportedPreviewSizes() { 2727 String str = get(KEY_PREVIEW_SIZE + SUPPORTED_VALUES_SUFFIX); 2728 return splitSize(str); 2729 } 2730 2731 /** 2732 * <p>Gets the supported video frame sizes that can be used by 2733 * MediaRecorder.</p> 2734 * 2735 * <p>If the returned list is not null, the returned list will contain at 2736 * least one Size and one of the sizes in the returned list must be 2737 * passed to MediaRecorder.setVideoSize() for camcorder application if 2738 * camera is used as the video source. In this case, the size of the 2739 * preview can be different from the resolution of the recorded video 2740 * during video recording.</p> 2741 * 2742 * @return a list of Size object if camera has separate preview and 2743 * video output; otherwise, null is returned. 2744 * @see #getPreferredPreviewSizeForVideo() 2745 */ 2746 public List<Size> getSupportedVideoSizes() { 2747 String str = get(KEY_VIDEO_SIZE + SUPPORTED_VALUES_SUFFIX); 2748 return splitSize(str); 2749 } 2750 2751 /** 2752 * Returns the preferred or recommended preview size (width and height) 2753 * in pixels for video recording. Camcorder applications should 2754 * set the preview size to a value that is not larger than the 2755 * preferred preview size. In other words, the product of the width 2756 * and height of the preview size should not be larger than that of 2757 * the preferred preview size. In addition, we recommend to choose a 2758 * preview size that has the same aspect ratio as the resolution of 2759 * video to be recorded. 2760 * 2761 * @return the preferred preview size (width and height) in pixels for 2762 * video recording if getSupportedVideoSizes() does not return 2763 * null; otherwise, null is returned. 2764 * @see #getSupportedVideoSizes() 2765 */ 2766 public Size getPreferredPreviewSizeForVideo() { 2767 String pair = get(KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO); 2768 return strToSize(pair); 2769 } 2770 2771 /** 2772 * <p>Sets the dimensions for EXIF thumbnail in Jpeg picture. If 2773 * applications set both width and height to 0, EXIF will not contain 2774 * thumbnail.</p> 2775 * 2776 * <p>Applications need to consider the display orientation. See {@link 2777 * #setPreviewSize(int,int)} for reference.</p> 2778 * 2779 * @param width the width of the thumbnail, in pixels 2780 * @param height the height of the thumbnail, in pixels 2781 * @see #setPreviewSize(int,int) 2782 */ 2783 public void setJpegThumbnailSize(int width, int height) { 2784 set(KEY_JPEG_THUMBNAIL_WIDTH, width); 2785 set(KEY_JPEG_THUMBNAIL_HEIGHT, height); 2786 } 2787 2788 /** 2789 * Returns the dimensions for EXIF thumbnail in Jpeg picture. 2790 * 2791 * @return a Size object with the height and width setting for the EXIF 2792 * thumbnails 2793 */ 2794 public Size getJpegThumbnailSize() { 2795 return new Size(getInt(KEY_JPEG_THUMBNAIL_WIDTH), 2796 getInt(KEY_JPEG_THUMBNAIL_HEIGHT)); 2797 } 2798 2799 /** 2800 * Gets the supported jpeg thumbnail sizes. 2801 * 2802 * @return a list of Size object. This method will always return a list 2803 * with at least two elements. Size 0,0 (no thumbnail) is always 2804 * supported. 2805 */ 2806 public List<Size> getSupportedJpegThumbnailSizes() { 2807 String str = get(KEY_JPEG_THUMBNAIL_SIZE + SUPPORTED_VALUES_SUFFIX); 2808 return splitSize(str); 2809 } 2810 2811 /** 2812 * Sets the quality of the EXIF thumbnail in Jpeg picture. 2813 * 2814 * @param quality the JPEG quality of the EXIF thumbnail. The range is 1 2815 * to 100, with 100 being the best. 2816 */ 2817 public void setJpegThumbnailQuality(int quality) { 2818 set(KEY_JPEG_THUMBNAIL_QUALITY, quality); 2819 } 2820 2821 /** 2822 * Returns the quality setting for the EXIF thumbnail in Jpeg picture. 2823 * 2824 * @return the JPEG quality setting of the EXIF thumbnail. 2825 */ 2826 public int getJpegThumbnailQuality() { 2827 return getInt(KEY_JPEG_THUMBNAIL_QUALITY); 2828 } 2829 2830 /** 2831 * Sets Jpeg quality of captured picture. 2832 * 2833 * @param quality the JPEG quality of captured picture. The range is 1 2834 * to 100, with 100 being the best. 2835 */ 2836 public void setJpegQuality(int quality) { 2837 set(KEY_JPEG_QUALITY, quality); 2838 } 2839 2840 /** 2841 * Returns the quality setting for the JPEG picture. 2842 * 2843 * @return the JPEG picture quality setting. 2844 */ 2845 public int getJpegQuality() { 2846 return getInt(KEY_JPEG_QUALITY); 2847 } 2848 2849 /** 2850 * Sets the rate at which preview frames are received. This is the 2851 * target frame rate. The actual frame rate depends on the driver. 2852 * 2853 * @param fps the frame rate (frames per second) 2854 * @deprecated replaced by {@link #setPreviewFpsRange(int,int)} 2855 */ 2856 @Deprecated 2857 public void setPreviewFrameRate(int fps) { 2858 set(KEY_PREVIEW_FRAME_RATE, fps); 2859 } 2860 2861 /** 2862 * Returns the setting for the rate at which preview frames are 2863 * received. This is the target frame rate. The actual frame rate 2864 * depends on the driver. 2865 * 2866 * @return the frame rate setting (frames per second) 2867 * @deprecated replaced by {@link #getPreviewFpsRange(int[])} 2868 */ 2869 @Deprecated 2870 public int getPreviewFrameRate() { 2871 return getInt(KEY_PREVIEW_FRAME_RATE); 2872 } 2873 2874 /** 2875 * Gets the supported preview frame rates. 2876 * 2877 * @return a list of supported preview frame rates. null if preview 2878 * frame rate setting is not supported. 2879 * @deprecated replaced by {@link #getSupportedPreviewFpsRange()} 2880 */ 2881 @Deprecated 2882 public List<Integer> getSupportedPreviewFrameRates() { 2883 String str = get(KEY_PREVIEW_FRAME_RATE + SUPPORTED_VALUES_SUFFIX); 2884 return splitInt(str); 2885 } 2886 2887 /** 2888 * Sets the minimum and maximum preview fps. This controls the rate of 2889 * preview frames received in {@link PreviewCallback}. The minimum and 2890 * maximum preview fps must be one of the elements from {@link 2891 * #getSupportedPreviewFpsRange}. 2892 * 2893 * @param min the minimum preview fps (scaled by 1000). 2894 * @param max the maximum preview fps (scaled by 1000). 2895 * @throws RuntimeException if fps range is invalid. 2896 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 2897 * @see #getSupportedPreviewFpsRange() 2898 */ 2899 public void setPreviewFpsRange(int min, int max) { 2900 set(KEY_PREVIEW_FPS_RANGE, "" + min + "," + max); 2901 } 2902 2903 /** 2904 * Returns the current minimum and maximum preview fps. The values are 2905 * one of the elements returned by {@link #getSupportedPreviewFpsRange}. 2906 * 2907 * @return range the minimum and maximum preview fps (scaled by 1000). 2908 * @see #PREVIEW_FPS_MIN_INDEX 2909 * @see #PREVIEW_FPS_MAX_INDEX 2910 * @see #getSupportedPreviewFpsRange() 2911 */ 2912 public void getPreviewFpsRange(int[] range) { 2913 if (range == null || range.length != 2) { 2914 throw new IllegalArgumentException( 2915 "range must be an array with two elements."); 2916 } 2917 splitInt(get(KEY_PREVIEW_FPS_RANGE), range); 2918 } 2919 2920 /** 2921 * Gets the supported preview fps (frame-per-second) ranges. Each range 2922 * contains a minimum fps and maximum fps. If minimum fps equals to 2923 * maximum fps, the camera outputs frames in fixed frame rate. If not, 2924 * the camera outputs frames in auto frame rate. The actual frame rate 2925 * fluctuates between the minimum and the maximum. The values are 2926 * multiplied by 1000 and represented in integers. For example, if frame 2927 * rate is 26.623 frames per second, the value is 26623. 2928 * 2929 * @return a list of supported preview fps ranges. This method returns a 2930 * list with at least one element. Every element is an int array 2931 * of two values - minimum fps and maximum fps. The list is 2932 * sorted from small to large (first by maximum fps and then 2933 * minimum fps). 2934 * @see #PREVIEW_FPS_MIN_INDEX 2935 * @see #PREVIEW_FPS_MAX_INDEX 2936 */ 2937 public List<int[]> getSupportedPreviewFpsRange() { 2938 String str = get(KEY_PREVIEW_FPS_RANGE + SUPPORTED_VALUES_SUFFIX); 2939 return splitRange(str); 2940 } 2941 2942 /** 2943 * Sets the image format for preview pictures. 2944 * <p>If this is never called, the default format will be 2945 * {@link android.graphics.ImageFormat#NV21}, which 2946 * uses the NV21 encoding format.</p> 2947 * 2948 * <p>Use {@link Parameters#getSupportedPreviewFormats} to get a list of 2949 * the available preview formats. 2950 * 2951 * <p>It is strongly recommended that either 2952 * {@link android.graphics.ImageFormat#NV21} or 2953 * {@link android.graphics.ImageFormat#YV12} is used, since 2954 * they are supported by all camera devices.</p> 2955 * 2956 * <p>For YV12, the image buffer that is received is not necessarily 2957 * tightly packed, as there may be padding at the end of each row of 2958 * pixel data, as described in 2959 * {@link android.graphics.ImageFormat#YV12}. For camera callback data, 2960 * it can be assumed that the stride of the Y and UV data is the 2961 * smallest possible that meets the alignment requirements. That is, if 2962 * the preview size is <var>width x height</var>, then the following 2963 * equations describe the buffer index for the beginning of row 2964 * <var>y</var> for the Y plane and row <var>c</var> for the U and V 2965 * planes: 2966 * 2967 * <pre>{@code 2968 * yStride = (int) ceil(width / 16.0) * 16; 2969 * uvStride = (int) ceil( (yStride / 2) / 16.0) * 16; 2970 * ySize = yStride * height; 2971 * uvSize = uvStride * height / 2; 2972 * yRowIndex = yStride * y; 2973 * uRowIndex = ySize + uvSize + uvStride * c; 2974 * vRowIndex = ySize + uvStride * c; 2975 * size = ySize + uvSize * 2; 2976 * } 2977 *</pre> 2978 * 2979 * @param pixel_format the desired preview picture format, defined by 2980 * one of the {@link android.graphics.ImageFormat} constants. (E.g., 2981 * <var>ImageFormat.NV21</var> (default), or 2982 * <var>ImageFormat.YV12</var>) 2983 * 2984 * @see android.graphics.ImageFormat 2985 * @see android.hardware.Camera.Parameters#getSupportedPreviewFormats 2986 */ 2987 public void setPreviewFormat(int pixel_format) { 2988 String s = cameraFormatForPixelFormat(pixel_format); 2989 if (s == null) { 2990 throw new IllegalArgumentException( 2991 "Invalid pixel_format=" + pixel_format); 2992 } 2993 2994 set(KEY_PREVIEW_FORMAT, s); 2995 } 2996 2997 /** 2998 * Returns the image format for preview frames got from 2999 * {@link PreviewCallback}. 3000 * 3001 * @return the preview format. 3002 * @see android.graphics.ImageFormat 3003 * @see #setPreviewFormat 3004 */ 3005 public int getPreviewFormat() { 3006 return pixelFormatForCameraFormat(get(KEY_PREVIEW_FORMAT)); 3007 } 3008 3009 /** 3010 * Gets the supported preview formats. {@link android.graphics.ImageFormat#NV21} 3011 * is always supported. {@link android.graphics.ImageFormat#YV12} 3012 * is always supported since API level 12. 3013 * 3014 * @return a list of supported preview formats. This method will always 3015 * return a list with at least one element. 3016 * @see android.graphics.ImageFormat 3017 * @see #setPreviewFormat 3018 */ 3019 public List<Integer> getSupportedPreviewFormats() { 3020 String str = get(KEY_PREVIEW_FORMAT + SUPPORTED_VALUES_SUFFIX); 3021 ArrayList<Integer> formats = new ArrayList<Integer>(); 3022 for (String s : split(str)) { 3023 int f = pixelFormatForCameraFormat(s); 3024 if (f == ImageFormat.UNKNOWN) continue; 3025 formats.add(f); 3026 } 3027 return formats; 3028 } 3029 3030 /** 3031 * <p>Sets the dimensions for pictures.</p> 3032 * 3033 * <p>Applications need to consider the display orientation. See {@link 3034 * #setPreviewSize(int,int)} for reference.</p> 3035 * 3036 * @param width the width for pictures, in pixels 3037 * @param height the height for pictures, in pixels 3038 * @see #setPreviewSize(int,int) 3039 * 3040 */ 3041 public void setPictureSize(int width, int height) { 3042 String v = Integer.toString(width) + "x" + Integer.toString(height); 3043 set(KEY_PICTURE_SIZE, v); 3044 } 3045 3046 /** 3047 * Returns the dimension setting for pictures. 3048 * 3049 * @return a Size object with the height and width setting 3050 * for pictures 3051 */ 3052 public Size getPictureSize() { 3053 String pair = get(KEY_PICTURE_SIZE); 3054 return strToSize(pair); 3055 } 3056 3057 /** 3058 * Gets the supported picture sizes. 3059 * 3060 * @return a list of supported picture sizes. This method will always 3061 * return a list with at least one element. 3062 */ 3063 public List<Size> getSupportedPictureSizes() { 3064 String str = get(KEY_PICTURE_SIZE + SUPPORTED_VALUES_SUFFIX); 3065 return splitSize(str); 3066 } 3067 3068 /** 3069 * Sets the image format for pictures. 3070 * 3071 * @param pixel_format the desired picture format 3072 * (<var>ImageFormat.NV21</var>, 3073 * <var>ImageFormat.RGB_565</var>, or 3074 * <var>ImageFormat.JPEG</var>) 3075 * @see android.graphics.ImageFormat 3076 */ 3077 public void setPictureFormat(int pixel_format) { 3078 String s = cameraFormatForPixelFormat(pixel_format); 3079 if (s == null) { 3080 throw new IllegalArgumentException( 3081 "Invalid pixel_format=" + pixel_format); 3082 } 3083 3084 set(KEY_PICTURE_FORMAT, s); 3085 } 3086 3087 /** 3088 * Returns the image format for pictures. 3089 * 3090 * @return the picture format 3091 * @see android.graphics.ImageFormat 3092 */ 3093 public int getPictureFormat() { 3094 return pixelFormatForCameraFormat(get(KEY_PICTURE_FORMAT)); 3095 } 3096 3097 /** 3098 * Gets the supported picture formats. 3099 * 3100 * @return supported picture formats. This method will always return a 3101 * list with at least one element. 3102 * @see android.graphics.ImageFormat 3103 */ 3104 public List<Integer> getSupportedPictureFormats() { 3105 String str = get(KEY_PICTURE_FORMAT + SUPPORTED_VALUES_SUFFIX); 3106 ArrayList<Integer> formats = new ArrayList<Integer>(); 3107 for (String s : split(str)) { 3108 int f = pixelFormatForCameraFormat(s); 3109 if (f == ImageFormat.UNKNOWN) continue; 3110 formats.add(f); 3111 } 3112 return formats; 3113 } 3114 3115 private String cameraFormatForPixelFormat(int pixel_format) { 3116 switch(pixel_format) { 3117 case ImageFormat.NV16: return PIXEL_FORMAT_YUV422SP; 3118 case ImageFormat.NV21: return PIXEL_FORMAT_YUV420SP; 3119 case ImageFormat.YUY2: return PIXEL_FORMAT_YUV422I; 3120 case ImageFormat.YV12: return PIXEL_FORMAT_YUV420P; 3121 case ImageFormat.RGB_565: return PIXEL_FORMAT_RGB565; 3122 case ImageFormat.JPEG: return PIXEL_FORMAT_JPEG; 3123 default: return null; 3124 } 3125 } 3126 3127 private int pixelFormatForCameraFormat(String format) { 3128 if (format == null) 3129 return ImageFormat.UNKNOWN; 3130 3131 if (format.equals(PIXEL_FORMAT_YUV422SP)) 3132 return ImageFormat.NV16; 3133 3134 if (format.equals(PIXEL_FORMAT_YUV420SP)) 3135 return ImageFormat.NV21; 3136 3137 if (format.equals(PIXEL_FORMAT_YUV422I)) 3138 return ImageFormat.YUY2; 3139 3140 if (format.equals(PIXEL_FORMAT_YUV420P)) 3141 return ImageFormat.YV12; 3142 3143 if (format.equals(PIXEL_FORMAT_RGB565)) 3144 return ImageFormat.RGB_565; 3145 3146 if (format.equals(PIXEL_FORMAT_JPEG)) 3147 return ImageFormat.JPEG; 3148 3149 return ImageFormat.UNKNOWN; 3150 } 3151 3152 /** 3153 * Sets the clockwise rotation angle in degrees relative to the 3154 * orientation of the camera. This affects the pictures returned from 3155 * JPEG {@link PictureCallback}. The camera driver may set orientation 3156 * in the EXIF header without rotating the picture. Or the driver may 3157 * rotate the picture and the EXIF thumbnail. If the Jpeg picture is 3158 * rotated, the orientation in the EXIF header will be missing or 1 (row 3159 * #0 is top and column #0 is left side). 3160 * 3161 * <p> 3162 * If applications want to rotate the picture to match the orientation 3163 * of what users see, apps should use 3164 * {@link android.view.OrientationEventListener} and 3165 * {@link android.hardware.Camera.CameraInfo}. The value from 3166 * OrientationEventListener is relative to the natural orientation of 3167 * the device. CameraInfo.orientation is the angle between camera 3168 * orientation and natural device orientation. The sum of the two is the 3169 * rotation angle for back-facing camera. The difference of the two is 3170 * the rotation angle for front-facing camera. Note that the JPEG 3171 * pictures of front-facing cameras are not mirrored as in preview 3172 * display. 3173 * 3174 * <p> 3175 * For example, suppose the natural orientation of the device is 3176 * portrait. The device is rotated 270 degrees clockwise, so the device 3177 * orientation is 270. Suppose a back-facing camera sensor is mounted in 3178 * landscape and the top side of the camera sensor is aligned with the 3179 * right edge of the display in natural orientation. So the camera 3180 * orientation is 90. The rotation should be set to 0 (270 + 90). 3181 * 3182 * <p>The reference code is as follows. 3183 * 3184 * <pre> 3185 * public void onOrientationChanged(int orientation) { 3186 * if (orientation == ORIENTATION_UNKNOWN) return; 3187 * android.hardware.Camera.CameraInfo info = 3188 * new android.hardware.Camera.CameraInfo(); 3189 * android.hardware.Camera.getCameraInfo(cameraId, info); 3190 * orientation = (orientation + 45) / 90 * 90; 3191 * int rotation = 0; 3192 * if (info.facing == CameraInfo.CAMERA_FACING_FRONT) { 3193 * rotation = (info.orientation - orientation + 360) % 360; 3194 * } else { // back-facing camera 3195 * rotation = (info.orientation + orientation) % 360; 3196 * } 3197 * mParameters.setRotation(rotation); 3198 * } 3199 * </pre> 3200 * 3201 * @param rotation The rotation angle in degrees relative to the 3202 * orientation of the camera. Rotation can only be 0, 3203 * 90, 180 or 270. 3204 * @throws IllegalArgumentException if rotation value is invalid. 3205 * @see android.view.OrientationEventListener 3206 * @see #getCameraInfo(int, CameraInfo) 3207 */ 3208 public void setRotation(int rotation) { 3209 if (rotation == 0 || rotation == 90 || rotation == 180 3210 || rotation == 270) { 3211 set(KEY_ROTATION, Integer.toString(rotation)); 3212 } else { 3213 throw new IllegalArgumentException( 3214 "Invalid rotation=" + rotation); 3215 } 3216 } 3217 3218 /** 3219 * Sets GPS latitude coordinate. This will be stored in JPEG EXIF 3220 * header. 3221 * 3222 * @param latitude GPS latitude coordinate. 3223 */ 3224 public void setGpsLatitude(double latitude) { 3225 set(KEY_GPS_LATITUDE, Double.toString(latitude)); 3226 } 3227 3228 /** 3229 * Sets GPS longitude coordinate. This will be stored in JPEG EXIF 3230 * header. 3231 * 3232 * @param longitude GPS longitude coordinate. 3233 */ 3234 public void setGpsLongitude(double longitude) { 3235 set(KEY_GPS_LONGITUDE, Double.toString(longitude)); 3236 } 3237 3238 /** 3239 * Sets GPS altitude. This will be stored in JPEG EXIF header. 3240 * 3241 * @param altitude GPS altitude in meters. 3242 */ 3243 public void setGpsAltitude(double altitude) { 3244 set(KEY_GPS_ALTITUDE, Double.toString(altitude)); 3245 } 3246 3247 /** 3248 * Sets GPS timestamp. This will be stored in JPEG EXIF header. 3249 * 3250 * @param timestamp GPS timestamp (UTC in seconds since January 1, 3251 * 1970). 3252 */ 3253 public void setGpsTimestamp(long timestamp) { 3254 set(KEY_GPS_TIMESTAMP, Long.toString(timestamp)); 3255 } 3256 3257 /** 3258 * Sets GPS processing method. The method will be stored in a UTF-8 string up to 31 bytes 3259 * long, in the JPEG EXIF header. 3260 * 3261 * @param processing_method The processing method to get this location. 3262 */ 3263 public void setGpsProcessingMethod(String processing_method) { 3264 set(KEY_GPS_PROCESSING_METHOD, processing_method); 3265 } 3266 3267 /** 3268 * Removes GPS latitude, longitude, altitude, and timestamp from the 3269 * parameters. 3270 */ 3271 public void removeGpsData() { 3272 remove(KEY_GPS_LATITUDE); 3273 remove(KEY_GPS_LONGITUDE); 3274 remove(KEY_GPS_ALTITUDE); 3275 remove(KEY_GPS_TIMESTAMP); 3276 remove(KEY_GPS_PROCESSING_METHOD); 3277 } 3278 3279 /** 3280 * Gets the current white balance setting. 3281 * 3282 * @return current white balance. null if white balance setting is not 3283 * supported. 3284 * @see #WHITE_BALANCE_AUTO 3285 * @see #WHITE_BALANCE_INCANDESCENT 3286 * @see #WHITE_BALANCE_FLUORESCENT 3287 * @see #WHITE_BALANCE_WARM_FLUORESCENT 3288 * @see #WHITE_BALANCE_DAYLIGHT 3289 * @see #WHITE_BALANCE_CLOUDY_DAYLIGHT 3290 * @see #WHITE_BALANCE_TWILIGHT 3291 * @see #WHITE_BALANCE_SHADE 3292 * 3293 */ 3294 public String getWhiteBalance() { 3295 return get(KEY_WHITE_BALANCE); 3296 } 3297 3298 /** 3299 * Sets the white balance. Changing the setting will release the 3300 * auto-white balance lock. It is recommended not to change white 3301 * balance and AWB lock at the same time. 3302 * 3303 * @param value new white balance. 3304 * @see #getWhiteBalance() 3305 * @see #setAutoWhiteBalanceLock(boolean) 3306 */ 3307 public void setWhiteBalance(String value) { 3308 String oldValue = get(KEY_WHITE_BALANCE); 3309 if (same(value, oldValue)) return; 3310 set(KEY_WHITE_BALANCE, value); 3311 set(KEY_AUTO_WHITEBALANCE_LOCK, FALSE); 3312 } 3313 3314 /** 3315 * Gets the supported white balance. 3316 * 3317 * @return a list of supported white balance. null if white balance 3318 * setting is not supported. 3319 * @see #getWhiteBalance() 3320 */ 3321 public List<String> getSupportedWhiteBalance() { 3322 String str = get(KEY_WHITE_BALANCE + SUPPORTED_VALUES_SUFFIX); 3323 return split(str); 3324 } 3325 3326 /** 3327 * Gets the current color effect setting. 3328 * 3329 * @return current color effect. null if color effect 3330 * setting is not supported. 3331 * @see #EFFECT_NONE 3332 * @see #EFFECT_MONO 3333 * @see #EFFECT_NEGATIVE 3334 * @see #EFFECT_SOLARIZE 3335 * @see #EFFECT_SEPIA 3336 * @see #EFFECT_POSTERIZE 3337 * @see #EFFECT_WHITEBOARD 3338 * @see #EFFECT_BLACKBOARD 3339 * @see #EFFECT_AQUA 3340 */ 3341 public String getColorEffect() { 3342 return get(KEY_EFFECT); 3343 } 3344 3345 /** 3346 * Sets the current color effect setting. 3347 * 3348 * @param value new color effect. 3349 * @see #getColorEffect() 3350 */ 3351 public void setColorEffect(String value) { 3352 set(KEY_EFFECT, value); 3353 } 3354 3355 /** 3356 * Gets the supported color effects. 3357 * 3358 * @return a list of supported color effects. null if color effect 3359 * setting is not supported. 3360 * @see #getColorEffect() 3361 */ 3362 public List<String> getSupportedColorEffects() { 3363 String str = get(KEY_EFFECT + SUPPORTED_VALUES_SUFFIX); 3364 return split(str); 3365 } 3366 3367 3368 /** 3369 * Gets the current antibanding setting. 3370 * 3371 * @return current antibanding. null if antibanding setting is not 3372 * supported. 3373 * @see #ANTIBANDING_AUTO 3374 * @see #ANTIBANDING_50HZ 3375 * @see #ANTIBANDING_60HZ 3376 * @see #ANTIBANDING_OFF 3377 */ 3378 public String getAntibanding() { 3379 return get(KEY_ANTIBANDING); 3380 } 3381 3382 /** 3383 * Sets the antibanding. 3384 * 3385 * @param antibanding new antibanding value. 3386 * @see #getAntibanding() 3387 */ 3388 public void setAntibanding(String antibanding) { 3389 set(KEY_ANTIBANDING, antibanding); 3390 } 3391 3392 /** 3393 * Gets the supported antibanding values. 3394 * 3395 * @return a list of supported antibanding values. null if antibanding 3396 * setting is not supported. 3397 * @see #getAntibanding() 3398 */ 3399 public List<String> getSupportedAntibanding() { 3400 String str = get(KEY_ANTIBANDING + SUPPORTED_VALUES_SUFFIX); 3401 return split(str); 3402 } 3403 3404 /** 3405 * Gets the current scene mode setting. 3406 * 3407 * @return one of SCENE_MODE_XXX string constant. null if scene mode 3408 * setting is not supported. 3409 * @see #SCENE_MODE_AUTO 3410 * @see #SCENE_MODE_ACTION 3411 * @see #SCENE_MODE_PORTRAIT 3412 * @see #SCENE_MODE_LANDSCAPE 3413 * @see #SCENE_MODE_NIGHT 3414 * @see #SCENE_MODE_NIGHT_PORTRAIT 3415 * @see #SCENE_MODE_THEATRE 3416 * @see #SCENE_MODE_BEACH 3417 * @see #SCENE_MODE_SNOW 3418 * @see #SCENE_MODE_SUNSET 3419 * @see #SCENE_MODE_STEADYPHOTO 3420 * @see #SCENE_MODE_FIREWORKS 3421 * @see #SCENE_MODE_SPORTS 3422 * @see #SCENE_MODE_PARTY 3423 * @see #SCENE_MODE_CANDLELIGHT 3424 * @see #SCENE_MODE_BARCODE 3425 */ 3426 public String getSceneMode() { 3427 return get(KEY_SCENE_MODE); 3428 } 3429 3430 /** 3431 * Sets the scene mode. Changing scene mode may override other 3432 * parameters (such as flash mode, focus mode, white balance). For 3433 * example, suppose originally flash mode is on and supported flash 3434 * modes are on/off. In night scene mode, both flash mode and supported 3435 * flash mode may be changed to off. After setting scene mode, 3436 * applications should call getParameters to know if some parameters are 3437 * changed. 3438 * 3439 * @param value scene mode. 3440 * @see #getSceneMode() 3441 */ 3442 public void setSceneMode(String value) { 3443 set(KEY_SCENE_MODE, value); 3444 } 3445 3446 /** 3447 * Gets the supported scene modes. 3448 * 3449 * @return a list of supported scene modes. null if scene mode setting 3450 * is not supported. 3451 * @see #getSceneMode() 3452 */ 3453 public List<String> getSupportedSceneModes() { 3454 String str = get(KEY_SCENE_MODE + SUPPORTED_VALUES_SUFFIX); 3455 return split(str); 3456 } 3457 3458 /** 3459 * Gets the current flash mode setting. 3460 * 3461 * @return current flash mode. null if flash mode setting is not 3462 * supported. 3463 * @see #FLASH_MODE_OFF 3464 * @see #FLASH_MODE_AUTO 3465 * @see #FLASH_MODE_ON 3466 * @see #FLASH_MODE_RED_EYE 3467 * @see #FLASH_MODE_TORCH 3468 */ 3469 public String getFlashMode() { 3470 return get(KEY_FLASH_MODE); 3471 } 3472 3473 /** 3474 * Sets the flash mode. 3475 * 3476 * @param value flash mode. 3477 * @see #getFlashMode() 3478 */ 3479 public void setFlashMode(String value) { 3480 set(KEY_FLASH_MODE, value); 3481 } 3482 3483 /** 3484 * Gets the supported flash modes. 3485 * 3486 * @return a list of supported flash modes. null if flash mode setting 3487 * is not supported. 3488 * @see #getFlashMode() 3489 */ 3490 public List<String> getSupportedFlashModes() { 3491 String str = get(KEY_FLASH_MODE + SUPPORTED_VALUES_SUFFIX); 3492 return split(str); 3493 } 3494 3495 /** 3496 * Gets the current focus mode setting. 3497 * 3498 * @return current focus mode. This method will always return a non-null 3499 * value. Applications should call {@link 3500 * #autoFocus(AutoFocusCallback)} to start the focus if focus 3501 * mode is FOCUS_MODE_AUTO or FOCUS_MODE_MACRO. 3502 * @see #FOCUS_MODE_AUTO 3503 * @see #FOCUS_MODE_INFINITY 3504 * @see #FOCUS_MODE_MACRO 3505 * @see #FOCUS_MODE_FIXED 3506 * @see #FOCUS_MODE_EDOF 3507 * @see #FOCUS_MODE_CONTINUOUS_VIDEO 3508 */ 3509 public String getFocusMode() { 3510 return get(KEY_FOCUS_MODE); 3511 } 3512 3513 /** 3514 * Sets the focus mode. 3515 * 3516 * @param value focus mode. 3517 * @see #getFocusMode() 3518 */ 3519 public void setFocusMode(String value) { 3520 set(KEY_FOCUS_MODE, value); 3521 } 3522 3523 /** 3524 * Gets the supported focus modes. 3525 * 3526 * @return a list of supported focus modes. This method will always 3527 * return a list with at least one element. 3528 * @see #getFocusMode() 3529 */ 3530 public List<String> getSupportedFocusModes() { 3531 String str = get(KEY_FOCUS_MODE + SUPPORTED_VALUES_SUFFIX); 3532 return split(str); 3533 } 3534 3535 /** 3536 * Gets the focal length (in millimeter) of the camera. 3537 * 3538 * @return the focal length. Returns -1.0 when the device 3539 * doesn't report focal length information. 3540 */ 3541 public float getFocalLength() { 3542 return Float.parseFloat(get(KEY_FOCAL_LENGTH)); 3543 } 3544 3545 /** 3546 * Gets the horizontal angle of view in degrees. 3547 * 3548 * @return horizontal angle of view. Returns -1.0 when the device 3549 * doesn't report view angle information. 3550 */ 3551 public float getHorizontalViewAngle() { 3552 return Float.parseFloat(get(KEY_HORIZONTAL_VIEW_ANGLE)); 3553 } 3554 3555 /** 3556 * Gets the vertical angle of view in degrees. 3557 * 3558 * @return vertical angle of view. Returns -1.0 when the device 3559 * doesn't report view angle information. 3560 */ 3561 public float getVerticalViewAngle() { 3562 return Float.parseFloat(get(KEY_VERTICAL_VIEW_ANGLE)); 3563 } 3564 3565 /** 3566 * Gets the current exposure compensation index. 3567 * 3568 * @return current exposure compensation index. The range is {@link 3569 * #getMinExposureCompensation} to {@link 3570 * #getMaxExposureCompensation}. 0 means exposure is not 3571 * adjusted. 3572 */ 3573 public int getExposureCompensation() { 3574 return getInt(KEY_EXPOSURE_COMPENSATION, 0); 3575 } 3576 3577 /** 3578 * Sets the exposure compensation index. 3579 * 3580 * @param value exposure compensation index. The valid value range is 3581 * from {@link #getMinExposureCompensation} (inclusive) to {@link 3582 * #getMaxExposureCompensation} (inclusive). 0 means exposure is 3583 * not adjusted. Application should call 3584 * getMinExposureCompensation and getMaxExposureCompensation to 3585 * know if exposure compensation is supported. 3586 */ 3587 public void setExposureCompensation(int value) { 3588 set(KEY_EXPOSURE_COMPENSATION, value); 3589 } 3590 3591 /** 3592 * Gets the maximum exposure compensation index. 3593 * 3594 * @return maximum exposure compensation index (>=0). If both this 3595 * method and {@link #getMinExposureCompensation} return 0, 3596 * exposure compensation is not supported. 3597 */ 3598 public int getMaxExposureCompensation() { 3599 return getInt(KEY_MAX_EXPOSURE_COMPENSATION, 0); 3600 } 3601 3602 /** 3603 * Gets the minimum exposure compensation index. 3604 * 3605 * @return minimum exposure compensation index (<=0). If both this 3606 * method and {@link #getMaxExposureCompensation} return 0, 3607 * exposure compensation is not supported. 3608 */ 3609 public int getMinExposureCompensation() { 3610 return getInt(KEY_MIN_EXPOSURE_COMPENSATION, 0); 3611 } 3612 3613 /** 3614 * Gets the exposure compensation step. 3615 * 3616 * @return exposure compensation step. Applications can get EV by 3617 * multiplying the exposure compensation index and step. Ex: if 3618 * exposure compensation index is -6 and step is 0.333333333, EV 3619 * is -2. 3620 */ 3621 public float getExposureCompensationStep() { 3622 return getFloat(KEY_EXPOSURE_COMPENSATION_STEP, 0); 3623 } 3624 3625 /** 3626 * <p>Sets the auto-exposure lock state. Applications should check 3627 * {@link #isAutoExposureLockSupported} before using this method.</p> 3628 * 3629 * <p>If set to true, the camera auto-exposure routine will immediately 3630 * pause until the lock is set to false. Exposure compensation settings 3631 * changes will still take effect while auto-exposure is locked.</p> 3632 * 3633 * <p>If auto-exposure is already locked, setting this to true again has 3634 * no effect (the driver will not recalculate exposure values).</p> 3635 * 3636 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 3637 * image capture with {@link #takePicture(Camera.ShutterCallback, 3638 * Camera.PictureCallback, Camera.PictureCallback)}, will not change the 3639 * lock.</p> 3640 * 3641 * <p>Exposure compensation, auto-exposure lock, and auto-white balance 3642 * lock can be used to capture an exposure-bracketed burst of images, 3643 * for example.</p> 3644 * 3645 * <p>Auto-exposure state, including the lock state, will not be 3646 * maintained after camera {@link #release()} is called. Locking 3647 * auto-exposure after {@link #open()} but before the first call to 3648 * {@link #startPreview()} will not allow the auto-exposure routine to 3649 * run at all, and may result in severely over- or under-exposed 3650 * images.</p> 3651 * 3652 * @param toggle new state of the auto-exposure lock. True means that 3653 * auto-exposure is locked, false means that the auto-exposure 3654 * routine is free to run normally. 3655 * 3656 * @see #getAutoExposureLock() 3657 */ 3658 public void setAutoExposureLock(boolean toggle) { 3659 set(KEY_AUTO_EXPOSURE_LOCK, toggle ? TRUE : FALSE); 3660 } 3661 3662 /** 3663 * Gets the state of the auto-exposure lock. Applications should check 3664 * {@link #isAutoExposureLockSupported} before using this method. See 3665 * {@link #setAutoExposureLock} for details about the lock. 3666 * 3667 * @return State of the auto-exposure lock. Returns true if 3668 * auto-exposure is currently locked, and false otherwise. 3669 * 3670 * @see #setAutoExposureLock(boolean) 3671 * 3672 */ 3673 public boolean getAutoExposureLock() { 3674 String str = get(KEY_AUTO_EXPOSURE_LOCK); 3675 return TRUE.equals(str); 3676 } 3677 3678 /** 3679 * Returns true if auto-exposure locking is supported. Applications 3680 * should call this before trying to lock auto-exposure. See 3681 * {@link #setAutoExposureLock} for details about the lock. 3682 * 3683 * @return true if auto-exposure lock is supported. 3684 * @see #setAutoExposureLock(boolean) 3685 * 3686 */ 3687 public boolean isAutoExposureLockSupported() { 3688 String str = get(KEY_AUTO_EXPOSURE_LOCK_SUPPORTED); 3689 return TRUE.equals(str); 3690 } 3691 3692 /** 3693 * <p>Sets the auto-white balance lock state. Applications should check 3694 * {@link #isAutoWhiteBalanceLockSupported} before using this 3695 * method.</p> 3696 * 3697 * <p>If set to true, the camera auto-white balance routine will 3698 * immediately pause until the lock is set to false.</p> 3699 * 3700 * <p>If auto-white balance is already locked, setting this to true 3701 * again has no effect (the driver will not recalculate white balance 3702 * values).</p> 3703 * 3704 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 3705 * image capture with {@link #takePicture(Camera.ShutterCallback, 3706 * Camera.PictureCallback, Camera.PictureCallback)}, will not change the 3707 * the lock.</p> 3708 * 3709 * <p> Changing the white balance mode with {@link #setWhiteBalance} 3710 * will release the auto-white balance lock if it is set.</p> 3711 * 3712 * <p>Exposure compensation, AE lock, and AWB lock can be used to 3713 * capture an exposure-bracketed burst of images, for example. 3714 * Auto-white balance state, including the lock state, will not be 3715 * maintained after camera {@link #release()} is called. Locking 3716 * auto-white balance after {@link #open()} but before the first call to 3717 * {@link #startPreview()} will not allow the auto-white balance routine 3718 * to run at all, and may result in severely incorrect color in captured 3719 * images.</p> 3720 * 3721 * @param toggle new state of the auto-white balance lock. True means 3722 * that auto-white balance is locked, false means that the 3723 * auto-white balance routine is free to run normally. 3724 * 3725 * @see #getAutoWhiteBalanceLock() 3726 * @see #setWhiteBalance(String) 3727 */ 3728 public void setAutoWhiteBalanceLock(boolean toggle) { 3729 set(KEY_AUTO_WHITEBALANCE_LOCK, toggle ? TRUE : FALSE); 3730 } 3731 3732 /** 3733 * Gets the state of the auto-white balance lock. Applications should 3734 * check {@link #isAutoWhiteBalanceLockSupported} before using this 3735 * method. See {@link #setAutoWhiteBalanceLock} for details about the 3736 * lock. 3737 * 3738 * @return State of the auto-white balance lock. Returns true if 3739 * auto-white balance is currently locked, and false 3740 * otherwise. 3741 * 3742 * @see #setAutoWhiteBalanceLock(boolean) 3743 * 3744 */ 3745 public boolean getAutoWhiteBalanceLock() { 3746 String str = get(KEY_AUTO_WHITEBALANCE_LOCK); 3747 return TRUE.equals(str); 3748 } 3749 3750 /** 3751 * Returns true if auto-white balance locking is supported. Applications 3752 * should call this before trying to lock auto-white balance. See 3753 * {@link #setAutoWhiteBalanceLock} for details about the lock. 3754 * 3755 * @return true if auto-white balance lock is supported. 3756 * @see #setAutoWhiteBalanceLock(boolean) 3757 * 3758 */ 3759 public boolean isAutoWhiteBalanceLockSupported() { 3760 String str = get(KEY_AUTO_WHITEBALANCE_LOCK_SUPPORTED); 3761 return TRUE.equals(str); 3762 } 3763 3764 /** 3765 * Gets current zoom value. This also works when smooth zoom is in 3766 * progress. Applications should check {@link #isZoomSupported} before 3767 * using this method. 3768 * 3769 * @return the current zoom value. The range is 0 to {@link 3770 * #getMaxZoom}. 0 means the camera is not zoomed. 3771 */ 3772 public int getZoom() { 3773 return getInt(KEY_ZOOM, 0); 3774 } 3775 3776 /** 3777 * Sets current zoom value. If the camera is zoomed (value > 0), the 3778 * actual picture size may be smaller than picture size setting. 3779 * Applications can check the actual picture size after picture is 3780 * returned from {@link PictureCallback}. The preview size remains the 3781 * same in zoom. Applications should check {@link #isZoomSupported} 3782 * before using this method. 3783 * 3784 * @param value zoom value. The valid range is 0 to {@link #getMaxZoom}. 3785 */ 3786 public void setZoom(int value) { 3787 set(KEY_ZOOM, value); 3788 } 3789 3790 /** 3791 * Returns true if zoom is supported. Applications should call this 3792 * before using other zoom methods. 3793 * 3794 * @return true if zoom is supported. 3795 */ 3796 public boolean isZoomSupported() { 3797 String str = get(KEY_ZOOM_SUPPORTED); 3798 return TRUE.equals(str); 3799 } 3800 3801 /** 3802 * Gets the maximum zoom value allowed for snapshot. This is the maximum 3803 * value that applications can set to {@link #setZoom(int)}. 3804 * Applications should call {@link #isZoomSupported} before using this 3805 * method. This value may change in different preview size. Applications 3806 * should call this again after setting preview size. 3807 * 3808 * @return the maximum zoom value supported by the camera. 3809 */ 3810 public int getMaxZoom() { 3811 return getInt(KEY_MAX_ZOOM, 0); 3812 } 3813 3814 /** 3815 * Gets the zoom ratios of all zoom values. Applications should check 3816 * {@link #isZoomSupported} before using this method. 3817 * 3818 * @return the zoom ratios in 1/100 increments. Ex: a zoom of 3.2x is 3819 * returned as 320. The number of elements is {@link 3820 * #getMaxZoom} + 1. The list is sorted from small to large. The 3821 * first element is always 100. The last element is the zoom 3822 * ratio of the maximum zoom value. 3823 */ 3824 public List<Integer> getZoomRatios() { 3825 return splitInt(get(KEY_ZOOM_RATIOS)); 3826 } 3827 3828 /** 3829 * Returns true if smooth zoom is supported. Applications should call 3830 * this before using other smooth zoom methods. 3831 * 3832 * @return true if smooth zoom is supported. 3833 */ 3834 public boolean isSmoothZoomSupported() { 3835 String str = get(KEY_SMOOTH_ZOOM_SUPPORTED); 3836 return TRUE.equals(str); 3837 } 3838 3839 /** 3840 * <p>Gets the distances from the camera to where an object appears to be 3841 * in focus. The object is sharpest at the optimal focus distance. The 3842 * depth of field is the far focus distance minus near focus distance.</p> 3843 * 3844 * <p>Focus distances may change after calling {@link 3845 * #autoFocus(AutoFocusCallback)}, {@link #cancelAutoFocus}, or {@link 3846 * #startPreview()}. Applications can call {@link #getParameters()} 3847 * and this method anytime to get the latest focus distances. If the 3848 * focus mode is FOCUS_MODE_CONTINUOUS_VIDEO, focus distances may change 3849 * from time to time.</p> 3850 * 3851 * <p>This method is intended to estimate the distance between the camera 3852 * and the subject. After autofocus, the subject distance may be within 3853 * near and far focus distance. However, the precision depends on the 3854 * camera hardware, autofocus algorithm, the focus area, and the scene. 3855 * The error can be large and it should be only used as a reference.</p> 3856 * 3857 * <p>Far focus distance >= optimal focus distance >= near focus distance. 3858 * If the focus distance is infinity, the value will be 3859 * {@code Float.POSITIVE_INFINITY}.</p> 3860 * 3861 * @param output focus distances in meters. output must be a float 3862 * array with three elements. Near focus distance, optimal focus 3863 * distance, and far focus distance will be filled in the array. 3864 * @see #FOCUS_DISTANCE_NEAR_INDEX 3865 * @see #FOCUS_DISTANCE_OPTIMAL_INDEX 3866 * @see #FOCUS_DISTANCE_FAR_INDEX 3867 */ 3868 public void getFocusDistances(float[] output) { 3869 if (output == null || output.length != 3) { 3870 throw new IllegalArgumentException( 3871 "output must be a float array with three elements."); 3872 } 3873 splitFloat(get(KEY_FOCUS_DISTANCES), output); 3874 } 3875 3876 /** 3877 * Gets the maximum number of focus areas supported. This is the maximum 3878 * length of the list in {@link #setFocusAreas(List)} and 3879 * {@link #getFocusAreas()}. 3880 * 3881 * @return the maximum number of focus areas supported by the camera. 3882 * @see #getFocusAreas() 3883 */ 3884 public int getMaxNumFocusAreas() { 3885 return getInt(KEY_MAX_NUM_FOCUS_AREAS, 0); 3886 } 3887 3888 /** 3889 * <p>Gets the current focus areas. Camera driver uses the areas to decide 3890 * focus.</p> 3891 * 3892 * <p>Before using this API or {@link #setFocusAreas(List)}, apps should 3893 * call {@link #getMaxNumFocusAreas()} to know the maximum number of 3894 * focus areas first. If the value is 0, focus area is not supported.</p> 3895 * 3896 * <p>Each focus area is a rectangle with specified weight. The direction 3897 * is relative to the sensor orientation, that is, what the sensor sees. 3898 * The direction is not affected by the rotation or mirroring of 3899 * {@link #setDisplayOrientation(int)}. Coordinates of the rectangle 3900 * range from -1000 to 1000. (-1000, -1000) is the upper left point. 3901 * (1000, 1000) is the lower right point. The width and height of focus 3902 * areas cannot be 0 or negative.</p> 3903 * 3904 * <p>The weight must range from 1 to 1000. The weight should be 3905 * interpreted as a per-pixel weight - all pixels in the area have the 3906 * specified weight. This means a small area with the same weight as a 3907 * larger area will have less influence on the focusing than the larger 3908 * area. Focus areas can partially overlap and the driver will add the 3909 * weights in the overlap region.</p> 3910 * 3911 * <p>A special case of a {@code null} focus area list means the driver is 3912 * free to select focus targets as it wants. For example, the driver may 3913 * use more signals to select focus areas and change them 3914 * dynamically. Apps can set the focus area list to {@code null} if they 3915 * want the driver to completely control focusing.</p> 3916 * 3917 * <p>Focus areas are relative to the current field of view 3918 * ({@link #getZoom()}). No matter what the zoom level is, (-1000,-1000) 3919 * represents the top of the currently visible camera frame. The focus 3920 * area cannot be set to be outside the current field of view, even 3921 * when using zoom.</p> 3922 * 3923 * <p>Focus area only has effect if the current focus mode is 3924 * {@link #FOCUS_MODE_AUTO}, {@link #FOCUS_MODE_MACRO}, 3925 * {@link #FOCUS_MODE_CONTINUOUS_VIDEO}, or 3926 * {@link #FOCUS_MODE_CONTINUOUS_PICTURE}.</p> 3927 * 3928 * @return a list of current focus areas 3929 */ 3930 public List<Area> getFocusAreas() { 3931 return splitArea(get(KEY_FOCUS_AREAS)); 3932 } 3933 3934 /** 3935 * Sets focus areas. See {@link #getFocusAreas()} for documentation. 3936 * 3937 * @param focusAreas the focus areas 3938 * @see #getFocusAreas() 3939 */ 3940 public void setFocusAreas(List<Area> focusAreas) { 3941 set(KEY_FOCUS_AREAS, focusAreas); 3942 } 3943 3944 /** 3945 * Gets the maximum number of metering areas supported. This is the 3946 * maximum length of the list in {@link #setMeteringAreas(List)} and 3947 * {@link #getMeteringAreas()}. 3948 * 3949 * @return the maximum number of metering areas supported by the camera. 3950 * @see #getMeteringAreas() 3951 */ 3952 public int getMaxNumMeteringAreas() { 3953 return getInt(KEY_MAX_NUM_METERING_AREAS, 0); 3954 } 3955 3956 /** 3957 * <p>Gets the current metering areas. Camera driver uses these areas to 3958 * decide exposure.</p> 3959 * 3960 * <p>Before using this API or {@link #setMeteringAreas(List)}, apps should 3961 * call {@link #getMaxNumMeteringAreas()} to know the maximum number of 3962 * metering areas first. If the value is 0, metering area is not 3963 * supported.</p> 3964 * 3965 * <p>Each metering area is a rectangle with specified weight. The 3966 * direction is relative to the sensor orientation, that is, what the 3967 * sensor sees. The direction is not affected by the rotation or 3968 * mirroring of {@link #setDisplayOrientation(int)}. Coordinates of the 3969 * rectangle range from -1000 to 1000. (-1000, -1000) is the upper left 3970 * point. (1000, 1000) is the lower right point. The width and height of 3971 * metering areas cannot be 0 or negative.</p> 3972 * 3973 * <p>The weight must range from 1 to 1000, and represents a weight for 3974 * every pixel in the area. This means that a large metering area with 3975 * the same weight as a smaller area will have more effect in the 3976 * metering result. Metering areas can partially overlap and the driver 3977 * will add the weights in the overlap region.</p> 3978 * 3979 * <p>A special case of a {@code null} metering area list means the driver 3980 * is free to meter as it chooses. For example, the driver may use more 3981 * signals to select metering areas and change them dynamically. Apps 3982 * can set the metering area list to {@code null} if they want the 3983 * driver to completely control metering.</p> 3984 * 3985 * <p>Metering areas are relative to the current field of view 3986 * ({@link #getZoom()}). No matter what the zoom level is, (-1000,-1000) 3987 * represents the top of the currently visible camera frame. The 3988 * metering area cannot be set to be outside the current field of view, 3989 * even when using zoom.</p> 3990 * 3991 * <p>No matter what metering areas are, the final exposure are compensated 3992 * by {@link #setExposureCompensation(int)}.</p> 3993 * 3994 * @return a list of current metering areas 3995 */ 3996 public List<Area> getMeteringAreas() { 3997 return splitArea(get(KEY_METERING_AREAS)); 3998 } 3999 4000 /** 4001 * Sets metering areas. See {@link #getMeteringAreas()} for 4002 * documentation. 4003 * 4004 * @param meteringAreas the metering areas 4005 * @see #getMeteringAreas() 4006 */ 4007 public void setMeteringAreas(List<Area> meteringAreas) { 4008 set(KEY_METERING_AREAS, meteringAreas); 4009 } 4010 4011 /** 4012 * Gets the maximum number of detected faces supported. This is the 4013 * maximum length of the list returned from {@link FaceDetectionListener}. 4014 * If the return value is 0, face detection of the specified type is not 4015 * supported. 4016 * 4017 * @return the maximum number of detected face supported by the camera. 4018 * @see #startFaceDetection() 4019 */ 4020 public int getMaxNumDetectedFaces() { 4021 return getInt(KEY_MAX_NUM_DETECTED_FACES_HW, 0); 4022 } 4023 4024 /** 4025 * Sets recording mode hint. This tells the camera that the intent of 4026 * the application is to record videos {@link 4027 * android.media.MediaRecorder#start()}, not to take still pictures 4028 * {@link #takePicture(Camera.ShutterCallback, Camera.PictureCallback, 4029 * Camera.PictureCallback, Camera.PictureCallback)}. Using this hint can 4030 * allow MediaRecorder.start() to start faster or with fewer glitches on 4031 * output. This should be called before starting preview for the best 4032 * result, but can be changed while the preview is active. The default 4033 * value is false. 4034 * 4035 * The app can still call takePicture() when the hint is true or call 4036 * MediaRecorder.start() when the hint is false. But the performance may 4037 * be worse. 4038 * 4039 * @param hint true if the apps intend to record videos using 4040 * {@link android.media.MediaRecorder}. 4041 */ 4042 public void setRecordingHint(boolean hint) { 4043 set(KEY_RECORDING_HINT, hint ? TRUE : FALSE); 4044 } 4045 4046 /** 4047 * <p>Returns true if video snapshot is supported. That is, applications 4048 * can call {@link #takePicture(Camera.ShutterCallback, 4049 * Camera.PictureCallback, Camera.PictureCallback, 4050 * Camera.PictureCallback)} during recording. Applications do not need 4051 * to call {@link #startPreview()} after taking a picture. The preview 4052 * will be still active. Other than that, taking a picture during 4053 * recording is identical to taking a picture normally. All settings and 4054 * methods related to takePicture work identically. Ex: 4055 * {@link #getPictureSize()}, {@link #getSupportedPictureSizes()}, 4056 * {@link #setJpegQuality(int)}, {@link #setRotation(int)}, and etc. The 4057 * picture will have an EXIF header. {@link #FLASH_MODE_AUTO} and 4058 * {@link #FLASH_MODE_ON} also still work, but the video will record the 4059 * flash.</p> 4060 * 4061 * <p>Applications can set shutter callback as null to avoid the shutter 4062 * sound. It is also recommended to set raw picture and post view 4063 * callbacks to null to avoid the interrupt of preview display.</p> 4064 * 4065 * <p>Field-of-view of the recorded video may be different from that of the 4066 * captured pictures. The maximum size of a video snapshot may be 4067 * smaller than that for regular still captures. If the current picture 4068 * size is set higher than can be supported by video snapshot, the 4069 * picture will be captured at the maximum supported size instead.</p> 4070 * 4071 * @return true if video snapshot is supported. 4072 */ 4073 public boolean isVideoSnapshotSupported() { 4074 String str = get(KEY_VIDEO_SNAPSHOT_SUPPORTED); 4075 return TRUE.equals(str); 4076 } 4077 4078 /** 4079 * <p>Enables and disables video stabilization. Use 4080 * {@link #isVideoStabilizationSupported} to determine if calling this 4081 * method is valid.</p> 4082 * 4083 * <p>Video stabilization reduces the shaking due to the motion of the 4084 * camera in both the preview stream and in recorded videos, including 4085 * data received from the preview callback. It does not reduce motion 4086 * blur in images captured with 4087 * {@link Camera#takePicture takePicture}.</p> 4088 * 4089 * <p>Video stabilization can be enabled and disabled while preview or 4090 * recording is active, but toggling it may cause a jump in the video 4091 * stream that may be undesirable in a recorded video.</p> 4092 * 4093 * @param toggle Set to true to enable video stabilization, and false to 4094 * disable video stabilization. 4095 * @see #isVideoStabilizationSupported() 4096 * @see #getVideoStabilization() 4097 */ 4098 public void setVideoStabilization(boolean toggle) { 4099 set(KEY_VIDEO_STABILIZATION, toggle ? TRUE : FALSE); 4100 } 4101 4102 /** 4103 * Get the current state of video stabilization. See 4104 * {@link #setVideoStabilization} for details of video stabilization. 4105 * 4106 * @return true if video stabilization is enabled 4107 * @see #isVideoStabilizationSupported() 4108 * @see #setVideoStabilization(boolean) 4109 */ 4110 public boolean getVideoStabilization() { 4111 String str = get(KEY_VIDEO_STABILIZATION); 4112 return TRUE.equals(str); 4113 } 4114 4115 /** 4116 * Returns true if video stabilization is supported. See 4117 * {@link #setVideoStabilization} for details of video stabilization. 4118 * 4119 * @return true if video stabilization is supported 4120 * @see #setVideoStabilization(boolean) 4121 * @see #getVideoStabilization() 4122 */ 4123 public boolean isVideoStabilizationSupported() { 4124 String str = get(KEY_VIDEO_STABILIZATION_SUPPORTED); 4125 return TRUE.equals(str); 4126 } 4127 4128 // Splits a comma delimited string to an ArrayList of String. 4129 // Return null if the passing string is null or the size is 0. 4130 private ArrayList<String> split(String str) { 4131 if (str == null) return null; 4132 4133 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 4134 splitter.setString(str); 4135 ArrayList<String> substrings = new ArrayList<String>(); 4136 for (String s : splitter) { 4137 substrings.add(s); 4138 } 4139 return substrings; 4140 } 4141 4142 // Splits a comma delimited string to an ArrayList of Integer. 4143 // Return null if the passing string is null or the size is 0. 4144 private ArrayList<Integer> splitInt(String str) { 4145 if (str == null) return null; 4146 4147 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 4148 splitter.setString(str); 4149 ArrayList<Integer> substrings = new ArrayList<Integer>(); 4150 for (String s : splitter) { 4151 substrings.add(Integer.parseInt(s)); 4152 } 4153 if (substrings.size() == 0) return null; 4154 return substrings; 4155 } 4156 4157 private void splitInt(String str, int[] output) { 4158 if (str == null) return; 4159 4160 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 4161 splitter.setString(str); 4162 int index = 0; 4163 for (String s : splitter) { 4164 output[index++] = Integer.parseInt(s); 4165 } 4166 } 4167 4168 // Splits a comma delimited string to an ArrayList of Float. 4169 private void splitFloat(String str, float[] output) { 4170 if (str == null) return; 4171 4172 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 4173 splitter.setString(str); 4174 int index = 0; 4175 for (String s : splitter) { 4176 output[index++] = Float.parseFloat(s); 4177 } 4178 } 4179 4180 // Returns the value of a float parameter. 4181 private float getFloat(String key, float defaultValue) { 4182 try { 4183 return Float.parseFloat(mMap.get(key)); 4184 } catch (NumberFormatException ex) { 4185 return defaultValue; 4186 } 4187 } 4188 4189 // Returns the value of a integer parameter. 4190 private int getInt(String key, int defaultValue) { 4191 try { 4192 return Integer.parseInt(mMap.get(key)); 4193 } catch (NumberFormatException ex) { 4194 return defaultValue; 4195 } 4196 } 4197 4198 // Splits a comma delimited string to an ArrayList of Size. 4199 // Return null if the passing string is null or the size is 0. 4200 private ArrayList<Size> splitSize(String str) { 4201 if (str == null) return null; 4202 4203 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 4204 splitter.setString(str); 4205 ArrayList<Size> sizeList = new ArrayList<Size>(); 4206 for (String s : splitter) { 4207 Size size = strToSize(s); 4208 if (size != null) sizeList.add(size); 4209 } 4210 if (sizeList.size() == 0) return null; 4211 return sizeList; 4212 } 4213 4214 // Parses a string (ex: "480x320") to Size object. 4215 // Return null if the passing string is null. 4216 private Size strToSize(String str) { 4217 if (str == null) return null; 4218 4219 int pos = str.indexOf('x'); 4220 if (pos != -1) { 4221 String width = str.substring(0, pos); 4222 String height = str.substring(pos + 1); 4223 return new Size(Integer.parseInt(width), 4224 Integer.parseInt(height)); 4225 } 4226 Log.e(TAG, "Invalid size parameter string=" + str); 4227 return null; 4228 } 4229 4230 // Splits a comma delimited string to an ArrayList of int array. 4231 // Example string: "(10000,26623),(10000,30000)". Return null if the 4232 // passing string is null or the size is 0. 4233 private ArrayList<int[]> splitRange(String str) { 4234 if (str == null || str.charAt(0) != '(' 4235 || str.charAt(str.length() - 1) != ')') { 4236 Log.e(TAG, "Invalid range list string=" + str); 4237 return null; 4238 } 4239 4240 ArrayList<int[]> rangeList = new ArrayList<int[]>(); 4241 int endIndex, fromIndex = 1; 4242 do { 4243 int[] range = new int[2]; 4244 endIndex = str.indexOf("),(", fromIndex); 4245 if (endIndex == -1) endIndex = str.length() - 1; 4246 splitInt(str.substring(fromIndex, endIndex), range); 4247 rangeList.add(range); 4248 fromIndex = endIndex + 3; 4249 } while (endIndex != str.length() - 1); 4250 4251 if (rangeList.size() == 0) return null; 4252 return rangeList; 4253 } 4254 4255 // Splits a comma delimited string to an ArrayList of Area objects. 4256 // Example string: "(-10,-10,0,0,300),(0,0,10,10,700)". Return null if 4257 // the passing string is null or the size is 0 or (0,0,0,0,0). 4258 private ArrayList<Area> splitArea(String str) { 4259 if (str == null || str.charAt(0) != '(' 4260 || str.charAt(str.length() - 1) != ')') { 4261 Log.e(TAG, "Invalid area string=" + str); 4262 return null; 4263 } 4264 4265 ArrayList<Area> result = new ArrayList<Area>(); 4266 int endIndex, fromIndex = 1; 4267 int[] array = new int[5]; 4268 do { 4269 endIndex = str.indexOf("),(", fromIndex); 4270 if (endIndex == -1) endIndex = str.length() - 1; 4271 splitInt(str.substring(fromIndex, endIndex), array); 4272 Rect rect = new Rect(array[0], array[1], array[2], array[3]); 4273 result.add(new Area(rect, array[4])); 4274 fromIndex = endIndex + 3; 4275 } while (endIndex != str.length() - 1); 4276 4277 if (result.size() == 0) return null; 4278 4279 if (result.size() == 1) { 4280 Area area = result.get(0); 4281 Rect rect = area.rect; 4282 if (rect.left == 0 && rect.top == 0 && rect.right == 0 4283 && rect.bottom == 0 && area.weight == 0) { 4284 return null; 4285 } 4286 } 4287 4288 return result; 4289 } 4290 4291 private boolean same(String s1, String s2) { 4292 if (s1 == null && s2 == null) return true; 4293 if (s1 != null && s1.equals(s2)) return true; 4294 return false; 4295 } 4296 }; 4297} 4298