Camera.java revision 4a68e3c26dd2512c319071dc20074baa6e7d171f
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 android.annotation.SdkConstant; 20import android.annotation.SdkConstant.SdkConstantType; 21import android.content.Context; 22import android.graphics.ImageFormat; 23import android.graphics.Point; 24import android.graphics.Rect; 25import android.graphics.SurfaceTexture; 26import android.media.IAudioService; 27import android.os.Handler; 28import android.os.IBinder; 29import android.os.Looper; 30import android.os.Message; 31import android.os.RemoteException; 32import android.os.ServiceManager; 33import android.util.Log; 34import android.text.TextUtils; 35import android.view.Surface; 36import android.view.SurfaceHolder; 37 38import java.io.IOException; 39import java.lang.ref.WeakReference; 40import java.util.ArrayList; 41import java.util.HashMap; 42import java.util.List; 43import java.util.concurrent.locks.ReentrantLock; 44 45/** 46 * The Camera class is used to set image capture settings, start/stop preview, 47 * snap pictures, and retrieve frames for encoding for video. This class is a 48 * client for the Camera service, which manages the actual camera hardware. 49 * 50 * <p>To access the device camera, you must declare the 51 * {@link android.Manifest.permission#CAMERA} permission in your Android 52 * Manifest. Also be sure to include the 53 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 54 * manifest element to declare camera features used by your application. 55 * For example, if you use the camera and auto-focus feature, your Manifest 56 * should include the following:</p> 57 * <pre> <uses-permission android:name="android.permission.CAMERA" /> 58 * <uses-feature android:name="android.hardware.camera" /> 59 * <uses-feature android:name="android.hardware.camera.autofocus" /></pre> 60 * 61 * <p>To take pictures with this class, use the following steps:</p> 62 * 63 * <ol> 64 * <li>Obtain an instance of Camera from {@link #open(int)}. 65 * 66 * <li>Get existing (default) settings with {@link #getParameters()}. 67 * 68 * <li>If necessary, modify the returned {@link Camera.Parameters} object and call 69 * {@link #setParameters(Camera.Parameters)}. 70 * 71 * <li>If desired, call {@link #setDisplayOrientation(int)}. 72 * 73 * <li><b>Important</b>: Pass a fully initialized {@link SurfaceHolder} to 74 * {@link #setPreviewDisplay(SurfaceHolder)}. Without a surface, the camera 75 * will be unable to start the preview. 76 * 77 * <li><b>Important</b>: Call {@link #startPreview()} to start updating the 78 * preview surface. Preview must be started before you can take a picture. 79 * 80 * <li>When you want, call {@link #takePicture(Camera.ShutterCallback, 81 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)} to 82 * capture a photo. Wait for the callbacks to provide the actual image data. 83 * 84 * <li>After taking a picture, preview display will have stopped. To take more 85 * photos, call {@link #startPreview()} again first. 86 * 87 * <li>Call {@link #stopPreview()} to stop updating the preview surface. 88 * 89 * <li><b>Important:</b> Call {@link #release()} to release the camera for 90 * use by other applications. Applications should release the camera 91 * immediately in {@link android.app.Activity#onPause()} (and re-{@link #open()} 92 * it in {@link android.app.Activity#onResume()}). 93 * </ol> 94 * 95 * <p>To quickly switch to video recording mode, use these steps:</p> 96 * 97 * <ol> 98 * <li>Obtain and initialize a Camera and start preview as described above. 99 * 100 * <li>Call {@link #unlock()} to allow the media process to access the camera. 101 * 102 * <li>Pass the camera to {@link android.media.MediaRecorder#setCamera(Camera)}. 103 * See {@link android.media.MediaRecorder} information about video recording. 104 * 105 * <li>When finished recording, call {@link #reconnect()} to re-acquire 106 * and re-lock the camera. 107 * 108 * <li>If desired, restart preview and take more photos or videos. 109 * 110 * <li>Call {@link #stopPreview()} and {@link #release()} as described above. 111 * </ol> 112 * 113 * <p>This class is not thread-safe, and is meant for use from one event thread. 114 * Most long-running operations (preview, focus, photo capture, etc) happen 115 * asynchronously and invoke callbacks as necessary. Callbacks will be invoked 116 * on the event thread {@link #open(int)} was called from. This class's methods 117 * must never be called from multiple threads at once.</p> 118 * 119 * <p class="caution"><strong>Caution:</strong> Different Android-powered devices 120 * may have different hardware specifications, such as megapixel ratings and 121 * auto-focus capabilities. In order for your application to be compatible with 122 * more devices, you should not make assumptions about the device camera 123 * specifications.</p> 124 * 125 * <div class="special reference"> 126 * <h3>Developer Guides</h3> 127 * <p>For more information about using cameras, read the 128 * <a href="{@docRoot}guide/topics/media/camera.html">Camera</a> developer guide.</p> 129 * </div> 130 */ 131public class Camera { 132 private static final String TAG = "Camera"; 133 134 // These match the enums in frameworks/base/include/camera/Camera.h 135 private static final int CAMERA_MSG_ERROR = 0x001; 136 private static final int CAMERA_MSG_SHUTTER = 0x002; 137 private static final int CAMERA_MSG_FOCUS = 0x004; 138 private static final int CAMERA_MSG_ZOOM = 0x008; 139 private static final int CAMERA_MSG_PREVIEW_FRAME = 0x010; 140 private static final int CAMERA_MSG_VIDEO_FRAME = 0x020; 141 private static final int CAMERA_MSG_POSTVIEW_FRAME = 0x040; 142 private static final int CAMERA_MSG_RAW_IMAGE = 0x080; 143 private static final int CAMERA_MSG_COMPRESSED_IMAGE = 0x100; 144 private static final int CAMERA_MSG_RAW_IMAGE_NOTIFY = 0x200; 145 private static final int CAMERA_MSG_PREVIEW_METADATA = 0x400; 146 private static final int CAMERA_MSG_FOCUS_MOVE = 0x800; 147 148 private int mNativeContext; // accessed by native methods 149 private EventHandler mEventHandler; 150 private ShutterCallback mShutterCallback; 151 private PictureCallback mRawImageCallback; 152 private PictureCallback mJpegCallback; 153 private PreviewCallback mPreviewCallback; 154 private PictureCallback mPostviewCallback; 155 private AutoFocusCallback mAutoFocusCallback; 156 private AutoFocusMoveCallback mAutoFocusMoveCallback; 157 private OnZoomChangeListener mZoomListener; 158 private FaceDetectionListener mFaceListener; 159 private ErrorCallback mErrorCallback; 160 private boolean mOneShot; 161 private boolean mWithBuffer; 162 private boolean mFaceDetectionRunning = false; 163 private Object mAutoFocusCallbackLock = new Object(); 164 165 /** 166 * Broadcast Action: A new picture is taken by the camera, and the entry of 167 * the picture has been added to the media store. 168 * {@link android.content.Intent#getData} is URI of the picture. 169 */ 170 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 171 public static final String ACTION_NEW_PICTURE = "android.hardware.action.NEW_PICTURE"; 172 173 /** 174 * Broadcast Action: A new video is recorded by the camera, and the entry 175 * of the video has been added to the media store. 176 * {@link android.content.Intent#getData} is URI of the video. 177 */ 178 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 179 public static final String ACTION_NEW_VIDEO = "android.hardware.action.NEW_VIDEO"; 180 181 /** 182 * Hardware face detection. It does not use much CPU. 183 */ 184 private static final int CAMERA_FACE_DETECTION_HW = 0; 185 186 /** 187 * Software face detection. It uses some CPU. 188 */ 189 private static final int CAMERA_FACE_DETECTION_SW = 1; 190 191 /** 192 * Returns the number of physical cameras available on this device. 193 */ 194 public native static int getNumberOfCameras(); 195 196 /** 197 * Returns the information about a particular camera. 198 * If {@link #getNumberOfCameras()} returns N, the valid id is 0 to N-1. 199 */ 200 public static void getCameraInfo(int cameraId, CameraInfo cameraInfo) { 201 _getCameraInfo(cameraId, cameraInfo); 202 IBinder b = ServiceManager.getService(Context.AUDIO_SERVICE); 203 IAudioService audioService = IAudioService.Stub.asInterface(b); 204 try { 205 if (audioService.isCameraSoundForced()) { 206 // Only set this when sound is forced; otherwise let native code 207 // decide. 208 cameraInfo.canDisableShutterSound = false; 209 } 210 } catch (RemoteException e) { 211 Log.e(TAG, "Audio service is unavailable for queries"); 212 } 213 } 214 private native static void _getCameraInfo(int cameraId, CameraInfo cameraInfo); 215 216 /** 217 * Information about a camera 218 */ 219 public static class CameraInfo { 220 /** 221 * The facing of the camera is opposite to that of the screen. 222 */ 223 public static final int CAMERA_FACING_BACK = 0; 224 225 /** 226 * The facing of the camera is the same as that of the screen. 227 */ 228 public static final int CAMERA_FACING_FRONT = 1; 229 230 /** 231 * The direction that the camera faces. It should be 232 * CAMERA_FACING_BACK or CAMERA_FACING_FRONT. 233 */ 234 public int facing; 235 236 /** 237 * <p>The orientation of the camera image. The value is the angle that the 238 * camera image needs to be rotated clockwise so it shows correctly on 239 * the display in its natural orientation. It should be 0, 90, 180, or 270.</p> 240 * 241 * <p>For example, suppose a device has a naturally tall screen. The 242 * back-facing camera sensor is mounted in landscape. You are looking at 243 * the screen. If the top side of the camera sensor is aligned with the 244 * right edge of the screen in natural orientation, the value should be 245 * 90. If the top side of a front-facing camera sensor is aligned with 246 * the right of the screen, the value should be 270.</p> 247 * 248 * @see #setDisplayOrientation(int) 249 * @see Parameters#setRotation(int) 250 * @see Parameters#setPreviewSize(int, int) 251 * @see Parameters#setPictureSize(int, int) 252 * @see Parameters#setJpegThumbnailSize(int, int) 253 */ 254 public int orientation; 255 256 /** 257 * <p>Whether the shutter sound can be disabled.</p> 258 * 259 * <p>On some devices, the camera shutter sound cannot be turned off 260 * through {@link #enableShutterSound enableShutterSound}. This field 261 * can be used to determine whether a call to disable the shutter sound 262 * will succeed.</p> 263 * 264 * <p>If this field is set to true, then a call of 265 * {@code enableShutterSound(false)} will be successful. If set to 266 * false, then that call will fail, and the shutter sound will be played 267 * when {@link Camera#takePicture takePicture} is called.</p> 268 */ 269 public boolean canDisableShutterSound; 270 }; 271 272 /** 273 * Creates a new Camera object to access a particular hardware camera. If 274 * the same camera is opened by other applications, this will throw a 275 * RuntimeException. 276 * 277 * <p>You must call {@link #release()} when you are done using the camera, 278 * otherwise it will remain locked and be unavailable to other applications. 279 * 280 * <p>Your application should only have one Camera object active at a time 281 * for a particular hardware camera. 282 * 283 * <p>Callbacks from other methods are delivered to the event loop of the 284 * thread which called open(). If this thread has no event loop, then 285 * callbacks are delivered to the main application event loop. If there 286 * is no main application event loop, callbacks are not delivered. 287 * 288 * <p class="caution"><b>Caution:</b> On some devices, this method may 289 * take a long time to complete. It is best to call this method from a 290 * worker thread (possibly using {@link android.os.AsyncTask}) to avoid 291 * blocking the main application UI thread. 292 * 293 * @param cameraId the hardware camera to access, between 0 and 294 * {@link #getNumberOfCameras()}-1. 295 * @return a new Camera object, connected, locked and ready for use. 296 * @throws RuntimeException if opening the camera fails (for example, if the 297 * camera is in use by another process or device policy manager has 298 * disabled the camera). 299 * @see android.app.admin.DevicePolicyManager#getCameraDisabled(android.content.ComponentName) 300 */ 301 public static Camera open(int cameraId) { 302 return new Camera(cameraId); 303 } 304 305 /** 306 * Creates a new Camera object to access the first back-facing camera on the 307 * device. If the device does not have a back-facing camera, this returns 308 * null. 309 * @see #open(int) 310 */ 311 public static Camera open() { 312 int numberOfCameras = getNumberOfCameras(); 313 CameraInfo cameraInfo = new CameraInfo(); 314 for (int i = 0; i < numberOfCameras; i++) { 315 getCameraInfo(i, cameraInfo); 316 if (cameraInfo.facing == CameraInfo.CAMERA_FACING_BACK) { 317 return new Camera(i); 318 } 319 } 320 return null; 321 } 322 323 Camera(int cameraId) { 324 mShutterCallback = null; 325 mRawImageCallback = null; 326 mJpegCallback = null; 327 mPreviewCallback = null; 328 mPostviewCallback = null; 329 mZoomListener = null; 330 331 Looper looper; 332 if ((looper = Looper.myLooper()) != null) { 333 mEventHandler = new EventHandler(this, looper); 334 } else if ((looper = Looper.getMainLooper()) != null) { 335 mEventHandler = new EventHandler(this, looper); 336 } else { 337 mEventHandler = null; 338 } 339 340 native_setup(new WeakReference<Camera>(this), cameraId); 341 } 342 343 /** 344 * An empty Camera for testing purpose. 345 */ 346 Camera() { 347 } 348 349 protected void finalize() { 350 release(); 351 } 352 353 private native final void native_setup(Object camera_this, int cameraId); 354 private native final void native_release(); 355 356 357 /** 358 * Disconnects and releases the Camera object resources. 359 * 360 * <p>You must call this as soon as you're done with the Camera object.</p> 361 */ 362 public final void release() { 363 native_release(); 364 mFaceDetectionRunning = false; 365 } 366 367 /** 368 * Unlocks the camera to allow another process to access it. 369 * Normally, the camera is locked to the process with an active Camera 370 * object until {@link #release()} is called. To allow rapid handoff 371 * between processes, you can call this method to release the camera 372 * temporarily for another process to use; once the other process is done 373 * you can call {@link #reconnect()} to reclaim the camera. 374 * 375 * <p>This must be done before calling 376 * {@link android.media.MediaRecorder#setCamera(Camera)}. This cannot be 377 * called after recording starts. 378 * 379 * <p>If you are not recording video, you probably do not need this method. 380 * 381 * @throws RuntimeException if the camera cannot be unlocked. 382 */ 383 public native final void unlock(); 384 385 /** 386 * Re-locks the camera to prevent other processes from accessing it. 387 * Camera objects are locked by default unless {@link #unlock()} is 388 * called. Normally {@link #reconnect()} is used instead. 389 * 390 * <p>Since API level 14, camera is automatically locked for applications in 391 * {@link android.media.MediaRecorder#start()}. Applications can use the 392 * camera (ex: zoom) after recording starts. There is no need to call this 393 * after recording starts or stops. 394 * 395 * <p>If you are not recording video, you probably do not need this method. 396 * 397 * @throws RuntimeException if the camera cannot be re-locked (for 398 * example, if the camera is still in use by another process). 399 */ 400 public native final void lock(); 401 402 /** 403 * Reconnects to the camera service after another process used it. 404 * After {@link #unlock()} is called, another process may use the 405 * camera; when the process is done, you must reconnect to the camera, 406 * which will re-acquire the lock and allow you to continue using the 407 * camera. 408 * 409 * <p>Since API level 14, camera is automatically locked for applications in 410 * {@link android.media.MediaRecorder#start()}. Applications can use the 411 * camera (ex: zoom) after recording starts. There is no need to call this 412 * after recording starts or stops. 413 * 414 * <p>If you are not recording video, you probably do not need this method. 415 * 416 * @throws IOException if a connection cannot be re-established (for 417 * example, if the camera is still in use by another process). 418 */ 419 public native final void reconnect() throws IOException; 420 421 /** 422 * Sets the {@link Surface} to be used for live preview. 423 * Either a surface or surface texture is necessary for preview, and 424 * preview is necessary to take pictures. The same surface can be re-set 425 * without harm. Setting a preview surface will un-set any preview surface 426 * texture that was set via {@link #setPreviewTexture}. 427 * 428 * <p>The {@link SurfaceHolder} must already contain a surface when this 429 * method is called. If you are using {@link android.view.SurfaceView}, 430 * you will need to register a {@link SurfaceHolder.Callback} with 431 * {@link SurfaceHolder#addCallback(SurfaceHolder.Callback)} and wait for 432 * {@link SurfaceHolder.Callback#surfaceCreated(SurfaceHolder)} before 433 * calling setPreviewDisplay() or starting preview. 434 * 435 * <p>This method must be called before {@link #startPreview()}. The 436 * one exception is that if the preview surface is not set (or set to null) 437 * before startPreview() is called, then this method may be called once 438 * with a non-null parameter to set the preview surface. (This allows 439 * camera setup and surface creation to happen in parallel, saving time.) 440 * The preview surface may not otherwise change while preview is running. 441 * 442 * @param holder containing the Surface on which to place the preview, 443 * or null to remove the preview surface 444 * @throws IOException if the method fails (for example, if the surface 445 * is unavailable or unsuitable). 446 */ 447 public final void setPreviewDisplay(SurfaceHolder holder) throws IOException { 448 if (holder != null) { 449 setPreviewDisplay(holder.getSurface()); 450 } else { 451 setPreviewDisplay((Surface)null); 452 } 453 } 454 455 private native final void setPreviewDisplay(Surface surface) throws IOException; 456 457 /** 458 * Sets the {@link SurfaceTexture} to be used for live preview. 459 * Either a surface or surface texture is necessary for preview, and 460 * preview is necessary to take pictures. The same surface texture can be 461 * re-set without harm. Setting a preview surface texture will un-set any 462 * preview surface that was set via {@link #setPreviewDisplay}. 463 * 464 * <p>This method must be called before {@link #startPreview()}. The 465 * one exception is that if the preview surface texture is not set (or set 466 * to null) before startPreview() is called, then this method may be called 467 * once with a non-null parameter to set the preview surface. (This allows 468 * camera setup and surface creation to happen in parallel, saving time.) 469 * The preview surface texture may not otherwise change while preview is 470 * running. 471 * 472 * <p>The timestamps provided by {@link SurfaceTexture#getTimestamp()} for a 473 * SurfaceTexture set as the preview texture have an unspecified zero point, 474 * and cannot be directly compared between different cameras or different 475 * instances of the same camera, or across multiple runs of the same 476 * program. 477 * 478 * <p>If you are using the preview data to create video or still images, 479 * strongly consider using {@link android.media.MediaActionSound} to 480 * properly indicate image capture or recording start/stop to the user.</p> 481 * 482 * @see android.media.MediaActionSound 483 * @see android.graphics.SurfaceTexture 484 * @see android.view.TextureView 485 * @param surfaceTexture the {@link SurfaceTexture} to which the preview 486 * images are to be sent or null to remove the current preview surface 487 * texture 488 * @throws IOException if the method fails (for example, if the surface 489 * texture is unavailable or unsuitable). 490 */ 491 public native final void setPreviewTexture(SurfaceTexture surfaceTexture) throws IOException; 492 493 /** 494 * Callback interface used to deliver copies of preview frames as 495 * they are displayed. 496 * 497 * @see #setPreviewCallback(Camera.PreviewCallback) 498 * @see #setOneShotPreviewCallback(Camera.PreviewCallback) 499 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 500 * @see #startPreview() 501 */ 502 public interface PreviewCallback 503 { 504 /** 505 * Called as preview frames are displayed. This callback is invoked 506 * on the event thread {@link #open(int)} was called from. 507 * 508 * <p>If using the {@link android.graphics.ImageFormat#YV12} format, 509 * refer to the equations in {@link Camera.Parameters#setPreviewFormat} 510 * for the arrangement of the pixel data in the preview callback 511 * buffers. 512 * 513 * @param data the contents of the preview frame in the format defined 514 * by {@link android.graphics.ImageFormat}, which can be queried 515 * with {@link android.hardware.Camera.Parameters#getPreviewFormat()}. 516 * If {@link android.hardware.Camera.Parameters#setPreviewFormat(int)} 517 * is never called, the default will be the YCbCr_420_SP 518 * (NV21) format. 519 * @param camera the Camera service object. 520 */ 521 void onPreviewFrame(byte[] data, Camera camera); 522 }; 523 524 /** 525 * Starts capturing and drawing preview frames to the screen. 526 * Preview will not actually start until a surface is supplied 527 * with {@link #setPreviewDisplay(SurfaceHolder)} or 528 * {@link #setPreviewTexture(SurfaceTexture)}. 529 * 530 * <p>If {@link #setPreviewCallback(Camera.PreviewCallback)}, 531 * {@link #setOneShotPreviewCallback(Camera.PreviewCallback)}, or 532 * {@link #setPreviewCallbackWithBuffer(Camera.PreviewCallback)} were 533 * called, {@link Camera.PreviewCallback#onPreviewFrame(byte[], Camera)} 534 * will be called when preview data becomes available. 535 */ 536 public native final void startPreview(); 537 538 /** 539 * Stops capturing and drawing preview frames to the surface, and 540 * resets the camera for a future call to {@link #startPreview()}. 541 */ 542 public final void stopPreview() { 543 _stopPreview(); 544 mFaceDetectionRunning = false; 545 546 mShutterCallback = null; 547 mRawImageCallback = null; 548 mPostviewCallback = null; 549 mJpegCallback = null; 550 synchronized (mAutoFocusCallbackLock) { 551 mAutoFocusCallback = null; 552 } 553 mAutoFocusMoveCallback = null; 554 } 555 556 private native final void _stopPreview(); 557 558 /** 559 * Return current preview state. 560 * 561 * FIXME: Unhide before release 562 * @hide 563 */ 564 public native final boolean previewEnabled(); 565 566 /** 567 * <p>Installs a callback to be invoked for every preview frame in addition 568 * to displaying them on the screen. The callback will be repeatedly called 569 * for as long as preview is active. This method can be called at any time, 570 * even while preview is live. Any other preview callbacks are 571 * overridden.</p> 572 * 573 * <p>If you are using the preview data to create video or still images, 574 * strongly consider using {@link android.media.MediaActionSound} to 575 * properly indicate image capture or recording start/stop to the user.</p> 576 * 577 * @param cb a callback object that receives a copy of each preview frame, 578 * or null to stop receiving callbacks. 579 * @see android.media.MediaActionSound 580 */ 581 public final void setPreviewCallback(PreviewCallback cb) { 582 mPreviewCallback = cb; 583 mOneShot = false; 584 mWithBuffer = false; 585 // Always use one-shot mode. We fake camera preview mode by 586 // doing one-shot preview continuously. 587 setHasPreviewCallback(cb != null, false); 588 } 589 590 /** 591 * <p>Installs a callback to be invoked for the next preview frame in 592 * addition to displaying it on the screen. After one invocation, the 593 * callback is cleared. This method can be called any time, even when 594 * preview is live. Any other preview callbacks are overridden.</p> 595 * 596 * <p>If you are using the preview data to create video or still images, 597 * strongly consider using {@link android.media.MediaActionSound} to 598 * properly indicate image capture or recording start/stop to the user.</p> 599 * 600 * @param cb a callback object that receives a copy of the next preview frame, 601 * or null to stop receiving callbacks. 602 * @see android.media.MediaActionSound 603 */ 604 public final void setOneShotPreviewCallback(PreviewCallback cb) { 605 mPreviewCallback = cb; 606 mOneShot = true; 607 mWithBuffer = false; 608 setHasPreviewCallback(cb != null, false); 609 } 610 611 private native final void setHasPreviewCallback(boolean installed, boolean manualBuffer); 612 613 /** 614 * <p>Installs a callback to be invoked for every preview frame, using 615 * buffers supplied with {@link #addCallbackBuffer(byte[])}, in addition to 616 * displaying them on the screen. The callback will be repeatedly called 617 * for as long as preview is active and buffers are available. Any other 618 * preview callbacks are overridden.</p> 619 * 620 * <p>The purpose of this method is to improve preview efficiency and frame 621 * rate by allowing preview frame memory reuse. You must call 622 * {@link #addCallbackBuffer(byte[])} at some point -- before or after 623 * calling this method -- or no callbacks will received.</p> 624 * 625 * <p>The buffer queue will be cleared if this method is called with a null 626 * callback, {@link #setPreviewCallback(Camera.PreviewCallback)} is called, 627 * or {@link #setOneShotPreviewCallback(Camera.PreviewCallback)} is 628 * called.</p> 629 * 630 * <p>If you are using the preview data to create video or still images, 631 * strongly consider using {@link android.media.MediaActionSound} to 632 * properly indicate image capture or recording start/stop to the user.</p> 633 * 634 * @param cb a callback object that receives a copy of the preview frame, 635 * or null to stop receiving callbacks and clear the buffer queue. 636 * @see #addCallbackBuffer(byte[]) 637 * @see android.media.MediaActionSound 638 */ 639 public final void setPreviewCallbackWithBuffer(PreviewCallback cb) { 640 mPreviewCallback = cb; 641 mOneShot = false; 642 mWithBuffer = true; 643 setHasPreviewCallback(cb != null, true); 644 } 645 646 /** 647 * Adds a pre-allocated buffer to the preview callback buffer queue. 648 * Applications can add one or more buffers to the queue. When a preview 649 * frame arrives and there is still at least one available buffer, the 650 * buffer will be used and removed from the queue. Then preview callback is 651 * invoked with the buffer. If a frame arrives and there is no buffer left, 652 * the frame is discarded. Applications should add buffers back when they 653 * finish processing the data in them. 654 * 655 * <p>For formats besides YV12, the size of the buffer is determined by 656 * multiplying the preview image width, height, and bytes per pixel. The 657 * width and height can be read from 658 * {@link Camera.Parameters#getPreviewSize()}. Bytes per pixel can be 659 * computed from {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 660 * 8, using the image format from 661 * {@link Camera.Parameters#getPreviewFormat()}. 662 * 663 * <p>If using the {@link android.graphics.ImageFormat#YV12} format, the 664 * size can be calculated using the equations listed in 665 * {@link Camera.Parameters#setPreviewFormat}. 666 * 667 * <p>This method is only necessary when 668 * {@link #setPreviewCallbackWithBuffer(PreviewCallback)} is used. When 669 * {@link #setPreviewCallback(PreviewCallback)} or 670 * {@link #setOneShotPreviewCallback(PreviewCallback)} are used, buffers 671 * are automatically allocated. When a supplied buffer is too small to 672 * hold the preview frame data, preview callback will return null and 673 * the buffer will be removed from the buffer queue. 674 * 675 * @param callbackBuffer the buffer to add to the queue. The size of the 676 * buffer must match the values described above. 677 * @see #setPreviewCallbackWithBuffer(PreviewCallback) 678 */ 679 public final void addCallbackBuffer(byte[] callbackBuffer) 680 { 681 _addCallbackBuffer(callbackBuffer, CAMERA_MSG_PREVIEW_FRAME); 682 } 683 684 /** 685 * Adds a pre-allocated buffer to the raw image callback buffer queue. 686 * Applications can add one or more buffers to the queue. When a raw image 687 * frame arrives and there is still at least one available buffer, the 688 * buffer will be used to hold the raw image data and removed from the 689 * queue. Then raw image callback is invoked with the buffer. If a raw 690 * image frame arrives but there is no buffer left, the frame is 691 * discarded. Applications should add buffers back when they finish 692 * processing the data in them by calling this method again in order 693 * to avoid running out of raw image callback buffers. 694 * 695 * <p>The size of the buffer is determined by multiplying the raw image 696 * width, height, and bytes per pixel. The width and height can be 697 * read from {@link Camera.Parameters#getPictureSize()}. Bytes per pixel 698 * can be computed from 699 * {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 8, 700 * using the image format from {@link Camera.Parameters#getPreviewFormat()}. 701 * 702 * <p>This method is only necessary when the PictureCallbck for raw image 703 * is used while calling {@link #takePicture(Camera.ShutterCallback, 704 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}. 705 * 706 * <p>Please note that by calling this method, the mode for 707 * application-managed callback buffers is triggered. If this method has 708 * never been called, null will be returned by the raw image callback since 709 * there is no image callback buffer available. Furthermore, When a supplied 710 * buffer is too small to hold the raw image data, raw image callback will 711 * return null and the buffer will be removed from the buffer queue. 712 * 713 * @param callbackBuffer the buffer to add to the raw image callback buffer 714 * queue. The size should be width * height * (bits per pixel) / 8. An 715 * null callbackBuffer will be ignored and won't be added to the queue. 716 * 717 * @see #takePicture(Camera.ShutterCallback, 718 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}. 719 * 720 * {@hide} 721 */ 722 public final void addRawImageCallbackBuffer(byte[] callbackBuffer) 723 { 724 addCallbackBuffer(callbackBuffer, CAMERA_MSG_RAW_IMAGE); 725 } 726 727 private final void addCallbackBuffer(byte[] callbackBuffer, int msgType) 728 { 729 // CAMERA_MSG_VIDEO_FRAME may be allowed in the future. 730 if (msgType != CAMERA_MSG_PREVIEW_FRAME && 731 msgType != CAMERA_MSG_RAW_IMAGE) { 732 throw new IllegalArgumentException( 733 "Unsupported message type: " + msgType); 734 } 735 736 _addCallbackBuffer(callbackBuffer, msgType); 737 } 738 739 private native final void _addCallbackBuffer( 740 byte[] callbackBuffer, int msgType); 741 742 private class EventHandler extends Handler 743 { 744 private Camera mCamera; 745 746 public EventHandler(Camera c, Looper looper) { 747 super(looper); 748 mCamera = c; 749 } 750 751 @Override 752 public void handleMessage(Message msg) { 753 switch(msg.what) { 754 case CAMERA_MSG_SHUTTER: 755 if (mShutterCallback != null) { 756 mShutterCallback.onShutter(); 757 } 758 return; 759 760 case CAMERA_MSG_RAW_IMAGE: 761 if (mRawImageCallback != null) { 762 mRawImageCallback.onPictureTaken((byte[])msg.obj, mCamera); 763 } 764 return; 765 766 case CAMERA_MSG_COMPRESSED_IMAGE: 767 if (mJpegCallback != null) { 768 mJpegCallback.onPictureTaken((byte[])msg.obj, mCamera); 769 } 770 return; 771 772 case CAMERA_MSG_PREVIEW_FRAME: 773 PreviewCallback pCb = mPreviewCallback; 774 if (pCb != null) { 775 if (mOneShot) { 776 // Clear the callback variable before the callback 777 // in case the app calls setPreviewCallback from 778 // the callback function 779 mPreviewCallback = null; 780 } else if (!mWithBuffer) { 781 // We're faking the camera preview mode to prevent 782 // the app from being flooded with preview frames. 783 // Set to oneshot mode again. 784 setHasPreviewCallback(true, false); 785 } 786 pCb.onPreviewFrame((byte[])msg.obj, mCamera); 787 } 788 return; 789 790 case CAMERA_MSG_POSTVIEW_FRAME: 791 if (mPostviewCallback != null) { 792 mPostviewCallback.onPictureTaken((byte[])msg.obj, mCamera); 793 } 794 return; 795 796 case CAMERA_MSG_FOCUS: 797 AutoFocusCallback cb = null; 798 synchronized (mAutoFocusCallbackLock) { 799 cb = mAutoFocusCallback; 800 } 801 if (cb != null) { 802 boolean success = msg.arg1 == 0 ? false : true; 803 cb.onAutoFocus(success, mCamera); 804 } 805 return; 806 807 case CAMERA_MSG_ZOOM: 808 if (mZoomListener != null) { 809 mZoomListener.onZoomChange(msg.arg1, msg.arg2 != 0, mCamera); 810 } 811 return; 812 813 case CAMERA_MSG_PREVIEW_METADATA: 814 if (mFaceListener != null) { 815 mFaceListener.onFaceDetection((Face[])msg.obj, mCamera); 816 } 817 return; 818 819 case CAMERA_MSG_ERROR : 820 Log.e(TAG, "Error " + msg.arg1); 821 if (mErrorCallback != null) { 822 mErrorCallback.onError(msg.arg1, mCamera); 823 } 824 return; 825 826 case CAMERA_MSG_FOCUS_MOVE: 827 if (mAutoFocusMoveCallback != null) { 828 mAutoFocusMoveCallback.onAutoFocusMoving(msg.arg1 == 0 ? false : true, mCamera); 829 } 830 return; 831 832 default: 833 Log.e(TAG, "Unknown message type " + msg.what); 834 return; 835 } 836 } 837 } 838 839 private static void postEventFromNative(Object camera_ref, 840 int what, int arg1, int arg2, Object obj) 841 { 842 Camera c = (Camera)((WeakReference)camera_ref).get(); 843 if (c == null) 844 return; 845 846 if (c.mEventHandler != null) { 847 Message m = c.mEventHandler.obtainMessage(what, arg1, arg2, obj); 848 c.mEventHandler.sendMessage(m); 849 } 850 } 851 852 /** 853 * Callback interface used to notify on completion of camera auto focus. 854 * 855 * <p>Devices that do not support auto-focus will receive a "fake" 856 * callback to this interface. If your application needs auto-focus and 857 * should not be installed on devices <em>without</em> auto-focus, you must 858 * declare that your app uses the 859 * {@code android.hardware.camera.autofocus} feature, in the 860 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 861 * manifest element.</p> 862 * 863 * @see #autoFocus(AutoFocusCallback) 864 */ 865 public interface AutoFocusCallback 866 { 867 /** 868 * Called when the camera auto focus completes. If the camera 869 * does not support auto-focus and autoFocus is called, 870 * onAutoFocus will be called immediately with a fake value of 871 * <code>success</code> set to <code>true</code>. 872 * 873 * The auto-focus routine does not lock auto-exposure and auto-white 874 * balance after it completes. 875 * 876 * @param success true if focus was successful, false if otherwise 877 * @param camera the Camera service object 878 * @see android.hardware.Camera.Parameters#setAutoExposureLock(boolean) 879 * @see android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean) 880 */ 881 void onAutoFocus(boolean success, Camera camera); 882 } 883 884 /** 885 * Starts camera auto-focus and registers a callback function to run when 886 * the camera is focused. This method is only valid when preview is active 887 * (between {@link #startPreview()} and before {@link #stopPreview()}). 888 * 889 * <p>Callers should check 890 * {@link android.hardware.Camera.Parameters#getFocusMode()} to determine if 891 * this method should be called. If the camera does not support auto-focus, 892 * it is a no-op and {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} 893 * callback will be called immediately. 894 * 895 * <p>If your application should not be installed 896 * on devices without auto-focus, you must declare that your application 897 * uses auto-focus with the 898 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 899 * manifest element.</p> 900 * 901 * <p>If the current flash mode is not 902 * {@link android.hardware.Camera.Parameters#FLASH_MODE_OFF}, flash may be 903 * fired during auto-focus, depending on the driver and camera hardware.<p> 904 * 905 * <p>Auto-exposure lock {@link android.hardware.Camera.Parameters#getAutoExposureLock()} 906 * and auto-white balance locks {@link android.hardware.Camera.Parameters#getAutoWhiteBalanceLock()} 907 * do not change during and after autofocus. But auto-focus routine may stop 908 * auto-exposure and auto-white balance transiently during focusing. 909 * 910 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 911 * image capture with {@link #takePicture(Camera.ShutterCallback, 912 * Camera.PictureCallback, Camera.PictureCallback)}, will not change the 913 * the focus position. Applications must call cancelAutoFocus to reset the 914 * focus.</p> 915 * 916 * <p>If autofocus is successful, consider using 917 * {@link android.media.MediaActionSound} to properly play back an autofocus 918 * success sound to the user.</p> 919 * 920 * @param cb the callback to run 921 * @see #cancelAutoFocus() 922 * @see android.hardware.Camera.Parameters#setAutoExposureLock(boolean) 923 * @see android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean) 924 * @see android.media.MediaActionSound 925 */ 926 public final void autoFocus(AutoFocusCallback cb) 927 { 928 synchronized (mAutoFocusCallbackLock) { 929 mAutoFocusCallback = cb; 930 } 931 native_autoFocus(); 932 } 933 private native final void native_autoFocus(); 934 935 /** 936 * Cancels any auto-focus function in progress. 937 * Whether or not auto-focus is currently in progress, 938 * this function will return the focus position to the default. 939 * If the camera does not support auto-focus, this is a no-op. 940 * 941 * @see #autoFocus(Camera.AutoFocusCallback) 942 */ 943 public final void cancelAutoFocus() 944 { 945 synchronized (mAutoFocusCallbackLock) { 946 mAutoFocusCallback = null; 947 } 948 native_cancelAutoFocus(); 949 // CAMERA_MSG_FOCUS should be removed here because the following 950 // scenario can happen: 951 // - An application uses the same thread for autoFocus, cancelAutoFocus 952 // and looper thread. 953 // - The application calls autoFocus. 954 // - HAL sends CAMERA_MSG_FOCUS, which enters the looper message queue. 955 // Before event handler's handleMessage() is invoked, the application 956 // calls cancelAutoFocus and autoFocus. 957 // - The application gets the old CAMERA_MSG_FOCUS and thinks autofocus 958 // has been completed. But in fact it is not. 959 // 960 // As documented in the beginning of the file, apps should not use 961 // multiple threads to call autoFocus and cancelAutoFocus at the same 962 // time. It is HAL's responsibility not to send a CAMERA_MSG_FOCUS 963 // message after native_cancelAutoFocus is called. 964 mEventHandler.removeMessages(CAMERA_MSG_FOCUS); 965 } 966 private native final void native_cancelAutoFocus(); 967 968 /** 969 * Callback interface used to notify on auto focus start and stop. 970 * 971 * <p>This is only supported in continuous autofocus modes -- {@link 972 * Parameters#FOCUS_MODE_CONTINUOUS_VIDEO} and {@link 973 * Parameters#FOCUS_MODE_CONTINUOUS_PICTURE}. Applications can show 974 * autofocus animation based on this.</p> 975 */ 976 public interface AutoFocusMoveCallback 977 { 978 /** 979 * Called when the camera auto focus starts or stops. 980 * 981 * @param start true if focus starts to move, false if focus stops to move 982 * @param camera the Camera service object 983 */ 984 void onAutoFocusMoving(boolean start, Camera camera); 985 } 986 987 /** 988 * Sets camera auto-focus move callback. 989 * 990 * @param cb the callback to run 991 */ 992 public void setAutoFocusMoveCallback(AutoFocusMoveCallback cb) { 993 mAutoFocusMoveCallback = cb; 994 enableFocusMoveCallback((mAutoFocusMoveCallback != null) ? 1 : 0); 995 } 996 997 private native void enableFocusMoveCallback(int enable); 998 999 /** 1000 * Callback interface used to signal the moment of actual image capture. 1001 * 1002 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 1003 */ 1004 public interface ShutterCallback 1005 { 1006 /** 1007 * Called as near as possible to the moment when a photo is captured 1008 * from the sensor. This is a good opportunity to play a shutter sound 1009 * or give other feedback of camera operation. This may be some time 1010 * after the photo was triggered, but some time before the actual data 1011 * is available. 1012 */ 1013 void onShutter(); 1014 } 1015 1016 /** 1017 * Callback interface used to supply image data from a photo capture. 1018 * 1019 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 1020 */ 1021 public interface PictureCallback { 1022 /** 1023 * Called when image data is available after a picture is taken. 1024 * The format of the data depends on the context of the callback 1025 * and {@link Camera.Parameters} settings. 1026 * 1027 * @param data a byte array of the picture data 1028 * @param camera the Camera service object 1029 */ 1030 void onPictureTaken(byte[] data, Camera camera); 1031 }; 1032 1033 /** 1034 * Equivalent to takePicture(shutter, raw, null, jpeg). 1035 * 1036 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 1037 */ 1038 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 1039 PictureCallback jpeg) { 1040 takePicture(shutter, raw, null, jpeg); 1041 } 1042 private native final void native_takePicture(int msgType); 1043 1044 /** 1045 * Triggers an asynchronous image capture. The camera service will initiate 1046 * a series of callbacks to the application as the image capture progresses. 1047 * The shutter callback occurs after the image is captured. This can be used 1048 * to trigger a sound to let the user know that image has been captured. The 1049 * raw callback occurs when the raw image data is available (NOTE: the data 1050 * will be null if there is no raw image callback buffer available or the 1051 * raw image callback buffer is not large enough to hold the raw image). 1052 * The postview callback occurs when a scaled, fully processed postview 1053 * image is available (NOTE: not all hardware supports this). The jpeg 1054 * callback occurs when the compressed image is available. If the 1055 * application does not need a particular callback, a null can be passed 1056 * instead of a callback method. 1057 * 1058 * <p>This method is only valid when preview is active (after 1059 * {@link #startPreview()}). Preview will be stopped after the image is 1060 * taken; callers must call {@link #startPreview()} again if they want to 1061 * re-start preview or take more pictures. This should not be called between 1062 * {@link android.media.MediaRecorder#start()} and 1063 * {@link android.media.MediaRecorder#stop()}. 1064 * 1065 * <p>After calling this method, you must not call {@link #startPreview()} 1066 * or take another picture until the JPEG callback has returned. 1067 * 1068 * @param shutter the callback for image capture moment, or null 1069 * @param raw the callback for raw (uncompressed) image data, or null 1070 * @param postview callback with postview image data, may be null 1071 * @param jpeg the callback for JPEG image data, or null 1072 */ 1073 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 1074 PictureCallback postview, PictureCallback jpeg) { 1075 mShutterCallback = shutter; 1076 mRawImageCallback = raw; 1077 mPostviewCallback = postview; 1078 mJpegCallback = jpeg; 1079 1080 // If callback is not set, do not send me callbacks. 1081 int msgType = 0; 1082 if (mShutterCallback != null) { 1083 msgType |= CAMERA_MSG_SHUTTER; 1084 } 1085 if (mRawImageCallback != null) { 1086 msgType |= CAMERA_MSG_RAW_IMAGE; 1087 } 1088 if (mPostviewCallback != null) { 1089 msgType |= CAMERA_MSG_POSTVIEW_FRAME; 1090 } 1091 if (mJpegCallback != null) { 1092 msgType |= CAMERA_MSG_COMPRESSED_IMAGE; 1093 } 1094 1095 native_takePicture(msgType); 1096 mFaceDetectionRunning = false; 1097 } 1098 1099 /** 1100 * Zooms to the requested value smoothly. The driver will notify {@link 1101 * OnZoomChangeListener} of the zoom value and whether zoom is stopped at 1102 * the time. For example, suppose the current zoom is 0 and startSmoothZoom 1103 * is called with value 3. The 1104 * {@link Camera.OnZoomChangeListener#onZoomChange(int, boolean, Camera)} 1105 * method will be called three times with zoom values 1, 2, and 3. 1106 * Applications can call {@link #stopSmoothZoom} to stop the zoom earlier. 1107 * Applications should not call startSmoothZoom again or change the zoom 1108 * value before zoom stops. If the supplied zoom value equals to the current 1109 * zoom value, no zoom callback will be generated. This method is supported 1110 * if {@link android.hardware.Camera.Parameters#isSmoothZoomSupported} 1111 * returns true. 1112 * 1113 * @param value zoom value. The valid range is 0 to {@link 1114 * android.hardware.Camera.Parameters#getMaxZoom}. 1115 * @throws IllegalArgumentException if the zoom value is invalid. 1116 * @throws RuntimeException if the method fails. 1117 * @see #setZoomChangeListener(OnZoomChangeListener) 1118 */ 1119 public native final void startSmoothZoom(int value); 1120 1121 /** 1122 * Stops the smooth zoom. Applications should wait for the {@link 1123 * OnZoomChangeListener} to know when the zoom is actually stopped. This 1124 * method is supported if {@link 1125 * android.hardware.Camera.Parameters#isSmoothZoomSupported} is true. 1126 * 1127 * @throws RuntimeException if the method fails. 1128 */ 1129 public native final void stopSmoothZoom(); 1130 1131 /** 1132 * Set the clockwise rotation of preview display in degrees. This affects 1133 * the preview frames and the picture displayed after snapshot. This method 1134 * is useful for portrait mode applications. Note that preview display of 1135 * front-facing cameras is flipped horizontally before the rotation, that 1136 * is, the image is reflected along the central vertical axis of the camera 1137 * sensor. So the users can see themselves as looking into a mirror. 1138 * 1139 * <p>This does not affect the order of byte array passed in {@link 1140 * PreviewCallback#onPreviewFrame}, JPEG pictures, or recorded videos. This 1141 * method is not allowed to be called during preview. 1142 * 1143 * <p>If you want to make the camera image show in the same orientation as 1144 * the display, you can use the following code. 1145 * <pre> 1146 * public static void setCameraDisplayOrientation(Activity activity, 1147 * int cameraId, android.hardware.Camera camera) { 1148 * android.hardware.Camera.CameraInfo info = 1149 * new android.hardware.Camera.CameraInfo(); 1150 * android.hardware.Camera.getCameraInfo(cameraId, info); 1151 * int rotation = activity.getWindowManager().getDefaultDisplay() 1152 * .getRotation(); 1153 * int degrees = 0; 1154 * switch (rotation) { 1155 * case Surface.ROTATION_0: degrees = 0; break; 1156 * case Surface.ROTATION_90: degrees = 90; break; 1157 * case Surface.ROTATION_180: degrees = 180; break; 1158 * case Surface.ROTATION_270: degrees = 270; break; 1159 * } 1160 * 1161 * int result; 1162 * if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) { 1163 * result = (info.orientation + degrees) % 360; 1164 * result = (360 - result) % 360; // compensate the mirror 1165 * } else { // back-facing 1166 * result = (info.orientation - degrees + 360) % 360; 1167 * } 1168 * camera.setDisplayOrientation(result); 1169 * } 1170 * </pre> 1171 * 1172 * <p>Starting from API level 14, this method can be called when preview is 1173 * active. 1174 * 1175 * @param degrees the angle that the picture will be rotated clockwise. 1176 * Valid values are 0, 90, 180, and 270. The starting 1177 * position is 0 (landscape). 1178 * @see #setPreviewDisplay(SurfaceHolder) 1179 */ 1180 public native final void setDisplayOrientation(int degrees); 1181 1182 /** 1183 * <p>Enable or disable the default shutter sound when taking a picture.</p> 1184 * 1185 * <p>By default, the camera plays the system-defined camera shutter sound 1186 * when {@link #takePicture} is called. Using this method, the shutter sound 1187 * can be disabled. It is strongly recommended that an alternative shutter 1188 * sound is played in the {@link ShutterCallback} when the system shutter 1189 * sound is disabled.</p> 1190 * 1191 * <p>Note that devices may not always allow disabling the camera shutter 1192 * sound. If the shutter sound state cannot be set to the desired value, 1193 * this method will return false. {@link CameraInfo#canDisableShutterSound} 1194 * can be used to determine whether the device will allow the shutter sound 1195 * to be disabled.</p> 1196 * 1197 * @param enabled whether the camera should play the system shutter sound 1198 * when {@link #takePicture takePicture} is called. 1199 * @return {@code true} if the shutter sound state was successfully 1200 * changed. {@code false} if the shutter sound state could not be 1201 * changed. {@code true} is also returned if shutter sound playback 1202 * is already set to the requested state. 1203 * @see #takePicture 1204 * @see CameraInfo#canDisableShutterSound 1205 * @see ShutterCallback 1206 */ 1207 public final boolean enableShutterSound(boolean enabled) { 1208 if (!enabled) { 1209 IBinder b = ServiceManager.getService(Context.AUDIO_SERVICE); 1210 IAudioService audioService = IAudioService.Stub.asInterface(b); 1211 try { 1212 if (audioService.isCameraSoundForced()) return false; 1213 } catch (RemoteException e) { 1214 Log.e(TAG, "Audio service is unavailable for queries"); 1215 } 1216 } 1217 return _enableShutterSound(enabled); 1218 } 1219 1220 private native final boolean _enableShutterSound(boolean enabled); 1221 1222 /** 1223 * Callback interface for zoom changes during a smooth zoom operation. 1224 * 1225 * @see #setZoomChangeListener(OnZoomChangeListener) 1226 * @see #startSmoothZoom(int) 1227 */ 1228 public interface OnZoomChangeListener 1229 { 1230 /** 1231 * Called when the zoom value has changed during a smooth zoom. 1232 * 1233 * @param zoomValue the current zoom value. In smooth zoom mode, camera 1234 * calls this for every new zoom value. 1235 * @param stopped whether smooth zoom is stopped. If the value is true, 1236 * this is the last zoom update for the application. 1237 * @param camera the Camera service object 1238 */ 1239 void onZoomChange(int zoomValue, boolean stopped, Camera camera); 1240 }; 1241 1242 /** 1243 * Registers a listener to be notified when the zoom value is updated by the 1244 * camera driver during smooth zoom. 1245 * 1246 * @param listener the listener to notify 1247 * @see #startSmoothZoom(int) 1248 */ 1249 public final void setZoomChangeListener(OnZoomChangeListener listener) 1250 { 1251 mZoomListener = listener; 1252 } 1253 1254 /** 1255 * Callback interface for face detected in the preview frame. 1256 * 1257 */ 1258 public interface FaceDetectionListener 1259 { 1260 /** 1261 * Notify the listener of the detected faces in the preview frame. 1262 * 1263 * @param faces The detected faces in a list 1264 * @param camera The {@link Camera} service object 1265 */ 1266 void onFaceDetection(Face[] faces, Camera camera); 1267 } 1268 1269 /** 1270 * Registers a listener to be notified about the faces detected in the 1271 * preview frame. 1272 * 1273 * @param listener the listener to notify 1274 * @see #startFaceDetection() 1275 */ 1276 public final void setFaceDetectionListener(FaceDetectionListener listener) 1277 { 1278 mFaceListener = listener; 1279 } 1280 1281 /** 1282 * Starts the face detection. This should be called after preview is started. 1283 * The camera will notify {@link FaceDetectionListener} of the detected 1284 * faces in the preview frame. The detected faces may be the same as the 1285 * previous ones. Applications should call {@link #stopFaceDetection} to 1286 * stop the face detection. This method is supported if {@link 1287 * Parameters#getMaxNumDetectedFaces()} returns a number larger than 0. 1288 * If the face detection has started, apps should not call this again. 1289 * 1290 * <p>When the face detection is running, {@link Parameters#setWhiteBalance(String)}, 1291 * {@link Parameters#setFocusAreas(List)}, and {@link Parameters#setMeteringAreas(List)} 1292 * have no effect. The camera uses the detected faces to do auto-white balance, 1293 * auto exposure, and autofocus. 1294 * 1295 * <p>If the apps call {@link #autoFocus(AutoFocusCallback)}, the camera 1296 * will stop sending face callbacks. The last face callback indicates the 1297 * areas used to do autofocus. After focus completes, face detection will 1298 * resume sending face callbacks. If the apps call {@link 1299 * #cancelAutoFocus()}, the face callbacks will also resume.</p> 1300 * 1301 * <p>After calling {@link #takePicture(Camera.ShutterCallback, Camera.PictureCallback, 1302 * Camera.PictureCallback)} or {@link #stopPreview()}, and then resuming 1303 * preview with {@link #startPreview()}, the apps should call this method 1304 * again to resume face detection.</p> 1305 * 1306 * @throws IllegalArgumentException if the face detection is unsupported. 1307 * @throws RuntimeException if the method fails or the face detection is 1308 * already running. 1309 * @see FaceDetectionListener 1310 * @see #stopFaceDetection() 1311 * @see Parameters#getMaxNumDetectedFaces() 1312 */ 1313 public final void startFaceDetection() { 1314 if (mFaceDetectionRunning) { 1315 throw new RuntimeException("Face detection is already running"); 1316 } 1317 _startFaceDetection(CAMERA_FACE_DETECTION_HW); 1318 mFaceDetectionRunning = true; 1319 } 1320 1321 /** 1322 * Stops the face detection. 1323 * 1324 * @see #startFaceDetection() 1325 */ 1326 public final void stopFaceDetection() { 1327 _stopFaceDetection(); 1328 mFaceDetectionRunning = false; 1329 } 1330 1331 private native final void _startFaceDetection(int type); 1332 private native final void _stopFaceDetection(); 1333 1334 /** 1335 * Information about a face identified through camera face detection. 1336 * 1337 * <p>When face detection is used with a camera, the {@link FaceDetectionListener} returns a 1338 * list of face objects for use in focusing and metering.</p> 1339 * 1340 * @see FaceDetectionListener 1341 */ 1342 public static class Face { 1343 /** 1344 * Create an empty face. 1345 */ 1346 public Face() { 1347 } 1348 1349 /** 1350 * Bounds of the face. (-1000, -1000) represents the top-left of the 1351 * camera field of view, and (1000, 1000) represents the bottom-right of 1352 * the field of view. For example, suppose the size of the viewfinder UI 1353 * is 800x480. The rect passed from the driver is (-1000, -1000, 0, 0). 1354 * The corresponding viewfinder rect should be (0, 0, 400, 240). It is 1355 * guaranteed left < right and top < bottom. The coordinates can be 1356 * smaller than -1000 or bigger than 1000. But at least one vertex will 1357 * be within (-1000, -1000) and (1000, 1000). 1358 * 1359 * <p>The direction is relative to the sensor orientation, that is, what 1360 * the sensor sees. The direction is not affected by the rotation or 1361 * mirroring of {@link #setDisplayOrientation(int)}. The face bounding 1362 * rectangle does not provide any information about face orientation.</p> 1363 * 1364 * <p>Here is the matrix to convert driver coordinates to View coordinates 1365 * in pixels.</p> 1366 * <pre> 1367 * Matrix matrix = new Matrix(); 1368 * CameraInfo info = CameraHolder.instance().getCameraInfo()[cameraId]; 1369 * // Need mirror for front camera. 1370 * boolean mirror = (info.facing == CameraInfo.CAMERA_FACING_FRONT); 1371 * matrix.setScale(mirror ? -1 : 1, 1); 1372 * // This is the value for android.hardware.Camera.setDisplayOrientation. 1373 * matrix.postRotate(displayOrientation); 1374 * // Camera driver coordinates range from (-1000, -1000) to (1000, 1000). 1375 * // UI coordinates range from (0, 0) to (width, height). 1376 * matrix.postScale(view.getWidth() / 2000f, view.getHeight() / 2000f); 1377 * matrix.postTranslate(view.getWidth() / 2f, view.getHeight() / 2f); 1378 * </pre> 1379 * 1380 * @see #startFaceDetection() 1381 */ 1382 public Rect rect; 1383 1384 /** 1385 * <p>The confidence level for the detection of the face. The range is 1 to 1386 * 100. 100 is the highest confidence.</p> 1387 * 1388 * <p>Depending on the device, even very low-confidence faces may be 1389 * listed, so applications should filter out faces with low confidence, 1390 * depending on the use case. For a typical point-and-shoot camera 1391 * application that wishes to display rectangles around detected faces, 1392 * filtering out faces with confidence less than 50 is recommended.</p> 1393 * 1394 * @see #startFaceDetection() 1395 */ 1396 public int score; 1397 1398 /** 1399 * An unique id per face while the face is visible to the tracker. If 1400 * the face leaves the field-of-view and comes back, it will get a new 1401 * id. This is an optional field, may not be supported on all devices. 1402 * If not supported, id will always be set to -1. The optional fields 1403 * are supported as a set. Either they are all valid, or none of them 1404 * are. 1405 */ 1406 public int id = -1; 1407 1408 /** 1409 * The coordinates of the center of the left eye. The coordinates are in 1410 * the same space as the ones for {@link #rect}. This is an optional 1411 * field, may not be supported on all devices. If not supported, the 1412 * value will always be set to null. The optional fields are supported 1413 * as a set. Either they are all valid, or none of them are. 1414 */ 1415 public Point leftEye = null; 1416 1417 /** 1418 * The coordinates of the center of the right eye. The coordinates are 1419 * in the same space as the ones for {@link #rect}.This is an optional 1420 * field, may not be supported on all devices. If not supported, the 1421 * value will always be set to null. The optional fields are supported 1422 * as a set. Either they are all valid, or none of them are. 1423 */ 1424 public Point rightEye = null; 1425 1426 /** 1427 * The coordinates of the center of the mouth. The coordinates are in 1428 * the same space as the ones for {@link #rect}. This is an optional 1429 * field, may not be supported on all devices. If not supported, the 1430 * value will always be set to null. The optional fields are supported 1431 * as a set. Either they are all valid, or none of them are. 1432 */ 1433 public Point mouth = null; 1434 } 1435 1436 // Error codes match the enum in include/ui/Camera.h 1437 1438 /** 1439 * Unspecified camera error. 1440 * @see Camera.ErrorCallback 1441 */ 1442 public static final int CAMERA_ERROR_UNKNOWN = 1; 1443 1444 /** 1445 * Media server died. In this case, the application must release the 1446 * Camera object and instantiate a new one. 1447 * @see Camera.ErrorCallback 1448 */ 1449 public static final int CAMERA_ERROR_SERVER_DIED = 100; 1450 1451 /** 1452 * Callback interface for camera error notification. 1453 * 1454 * @see #setErrorCallback(ErrorCallback) 1455 */ 1456 public interface ErrorCallback 1457 { 1458 /** 1459 * Callback for camera errors. 1460 * @param error error code: 1461 * <ul> 1462 * <li>{@link #CAMERA_ERROR_UNKNOWN} 1463 * <li>{@link #CAMERA_ERROR_SERVER_DIED} 1464 * </ul> 1465 * @param camera the Camera service object 1466 */ 1467 void onError(int error, Camera camera); 1468 }; 1469 1470 /** 1471 * Registers a callback to be invoked when an error occurs. 1472 * @param cb The callback to run 1473 */ 1474 public final void setErrorCallback(ErrorCallback cb) 1475 { 1476 mErrorCallback = cb; 1477 } 1478 1479 private native final void native_setParameters(String params); 1480 private native final String native_getParameters(); 1481 1482 /** 1483 * Changes the settings for this Camera service. 1484 * 1485 * @param params the Parameters to use for this Camera service 1486 * @throws RuntimeException if any parameter is invalid or not supported. 1487 * @see #getParameters() 1488 */ 1489 public void setParameters(Parameters params) { 1490 native_setParameters(params.flatten()); 1491 } 1492 1493 /** 1494 * Returns the current settings for this Camera service. 1495 * If modifications are made to the returned Parameters, they must be passed 1496 * to {@link #setParameters(Camera.Parameters)} to take effect. 1497 * 1498 * @see #setParameters(Camera.Parameters) 1499 */ 1500 public Parameters getParameters() { 1501 Parameters p = new Parameters(); 1502 String s = native_getParameters(); 1503 p.unflatten(s); 1504 return p; 1505 } 1506 1507 /** 1508 * Returns an empty {@link Parameters} for testing purpose. 1509 * 1510 * @return a Parameter object. 1511 * 1512 * @hide 1513 */ 1514 public static Parameters getEmptyParameters() { 1515 Camera camera = new Camera(); 1516 return camera.new Parameters(); 1517 } 1518 1519 /** 1520 * Image size (width and height dimensions). 1521 */ 1522 public class Size { 1523 /** 1524 * Sets the dimensions for pictures. 1525 * 1526 * @param w the photo width (pixels) 1527 * @param h the photo height (pixels) 1528 */ 1529 public Size(int w, int h) { 1530 width = w; 1531 height = h; 1532 } 1533 /** 1534 * Compares {@code obj} to this size. 1535 * 1536 * @param obj the object to compare this size with. 1537 * @return {@code true} if the width and height of {@code obj} is the 1538 * same as those of this size. {@code false} otherwise. 1539 */ 1540 @Override 1541 public boolean equals(Object obj) { 1542 if (!(obj instanceof Size)) { 1543 return false; 1544 } 1545 Size s = (Size) obj; 1546 return width == s.width && height == s.height; 1547 } 1548 @Override 1549 public int hashCode() { 1550 return width * 32713 + height; 1551 } 1552 /** width of the picture */ 1553 public int width; 1554 /** height of the picture */ 1555 public int height; 1556 }; 1557 1558 /** 1559 * <p>The Area class is used for choosing specific metering and focus areas for 1560 * the camera to use when calculating auto-exposure, auto-white balance, and 1561 * auto-focus.</p> 1562 * 1563 * <p>To find out how many simultaneous areas a given camera supports, use 1564 * {@link Parameters#getMaxNumMeteringAreas()} and 1565 * {@link Parameters#getMaxNumFocusAreas()}. If metering or focusing area 1566 * selection is unsupported, these methods will return 0.</p> 1567 * 1568 * <p>Each Area consists of a rectangle specifying its bounds, and a weight 1569 * that determines its importance. The bounds are relative to the camera's 1570 * current field of view. The coordinates are mapped so that (-1000, -1000) 1571 * is always the top-left corner of the current field of view, and (1000, 1572 * 1000) is always the bottom-right corner of the current field of 1573 * view. Setting Areas with bounds outside that range is not allowed. Areas 1574 * with zero or negative width or height are not allowed.</p> 1575 * 1576 * <p>The weight must range from 1 to 1000, and represents a weight for 1577 * every pixel in the area. This means that a large metering area with 1578 * the same weight as a smaller area will have more effect in the 1579 * metering result. Metering areas can overlap and the driver 1580 * will add the weights in the overlap region.</p> 1581 * 1582 * @see Parameters#setFocusAreas(List) 1583 * @see Parameters#getFocusAreas() 1584 * @see Parameters#getMaxNumFocusAreas() 1585 * @see Parameters#setMeteringAreas(List) 1586 * @see Parameters#getMeteringAreas() 1587 * @see Parameters#getMaxNumMeteringAreas() 1588 */ 1589 public static class Area { 1590 /** 1591 * Create an area with specified rectangle and weight. 1592 * 1593 * @param rect the bounds of the area. 1594 * @param weight the weight of the area. 1595 */ 1596 public Area(Rect rect, int weight) { 1597 this.rect = rect; 1598 this.weight = weight; 1599 } 1600 /** 1601 * Compares {@code obj} to this area. 1602 * 1603 * @param obj the object to compare this area with. 1604 * @return {@code true} if the rectangle and weight of {@code obj} is 1605 * the same as those of this area. {@code false} otherwise. 1606 */ 1607 @Override 1608 public boolean equals(Object obj) { 1609 if (!(obj instanceof Area)) { 1610 return false; 1611 } 1612 Area a = (Area) obj; 1613 if (rect == null) { 1614 if (a.rect != null) return false; 1615 } else { 1616 if (!rect.equals(a.rect)) return false; 1617 } 1618 return weight == a.weight; 1619 } 1620 1621 /** 1622 * Bounds of the area. (-1000, -1000) represents the top-left of the 1623 * camera field of view, and (1000, 1000) represents the bottom-right of 1624 * the field of view. Setting bounds outside that range is not 1625 * allowed. Bounds with zero or negative width or height are not 1626 * allowed. 1627 * 1628 * @see Parameters#getFocusAreas() 1629 * @see Parameters#getMeteringAreas() 1630 */ 1631 public Rect rect; 1632 1633 /** 1634 * Weight of the area. The weight must range from 1 to 1000, and 1635 * represents a weight for every pixel in the area. This means that a 1636 * large metering area with the same weight as a smaller area will have 1637 * more effect in the metering result. Metering areas can overlap and 1638 * the driver will add the weights in the overlap region. 1639 * 1640 * @see Parameters#getFocusAreas() 1641 * @see Parameters#getMeteringAreas() 1642 */ 1643 public int weight; 1644 } 1645 1646 /** 1647 * Camera service settings. 1648 * 1649 * <p>To make camera parameters take effect, applications have to call 1650 * {@link Camera#setParameters(Camera.Parameters)}. For example, after 1651 * {@link Camera.Parameters#setWhiteBalance} is called, white balance is not 1652 * actually changed until {@link Camera#setParameters(Camera.Parameters)} 1653 * is called with the changed parameters object. 1654 * 1655 * <p>Different devices may have different camera capabilities, such as 1656 * picture size or flash modes. The application should query the camera 1657 * capabilities before setting parameters. For example, the application 1658 * should call {@link Camera.Parameters#getSupportedColorEffects()} before 1659 * calling {@link Camera.Parameters#setColorEffect(String)}. If the 1660 * camera does not support color effects, 1661 * {@link Camera.Parameters#getSupportedColorEffects()} will return null. 1662 */ 1663 public class Parameters { 1664 // Parameter keys to communicate with the camera driver. 1665 private static final String KEY_PREVIEW_SIZE = "preview-size"; 1666 private static final String KEY_PREVIEW_FORMAT = "preview-format"; 1667 private static final String KEY_PREVIEW_FRAME_RATE = "preview-frame-rate"; 1668 private static final String KEY_PREVIEW_FPS_RANGE = "preview-fps-range"; 1669 private static final String KEY_PICTURE_SIZE = "picture-size"; 1670 private static final String KEY_PICTURE_FORMAT = "picture-format"; 1671 private static final String KEY_JPEG_THUMBNAIL_SIZE = "jpeg-thumbnail-size"; 1672 private static final String KEY_JPEG_THUMBNAIL_WIDTH = "jpeg-thumbnail-width"; 1673 private static final String KEY_JPEG_THUMBNAIL_HEIGHT = "jpeg-thumbnail-height"; 1674 private static final String KEY_JPEG_THUMBNAIL_QUALITY = "jpeg-thumbnail-quality"; 1675 private static final String KEY_JPEG_QUALITY = "jpeg-quality"; 1676 private static final String KEY_ROTATION = "rotation"; 1677 private static final String KEY_GPS_LATITUDE = "gps-latitude"; 1678 private static final String KEY_GPS_LONGITUDE = "gps-longitude"; 1679 private static final String KEY_GPS_ALTITUDE = "gps-altitude"; 1680 private static final String KEY_GPS_TIMESTAMP = "gps-timestamp"; 1681 private static final String KEY_GPS_PROCESSING_METHOD = "gps-processing-method"; 1682 private static final String KEY_WHITE_BALANCE = "whitebalance"; 1683 private static final String KEY_EFFECT = "effect"; 1684 private static final String KEY_ANTIBANDING = "antibanding"; 1685 private static final String KEY_SCENE_MODE = "scene-mode"; 1686 private static final String KEY_FLASH_MODE = "flash-mode"; 1687 private static final String KEY_FOCUS_MODE = "focus-mode"; 1688 private static final String KEY_FOCUS_AREAS = "focus-areas"; 1689 private static final String KEY_MAX_NUM_FOCUS_AREAS = "max-num-focus-areas"; 1690 private static final String KEY_FOCAL_LENGTH = "focal-length"; 1691 private static final String KEY_HORIZONTAL_VIEW_ANGLE = "horizontal-view-angle"; 1692 private static final String KEY_VERTICAL_VIEW_ANGLE = "vertical-view-angle"; 1693 private static final String KEY_EXPOSURE_COMPENSATION = "exposure-compensation"; 1694 private static final String KEY_MAX_EXPOSURE_COMPENSATION = "max-exposure-compensation"; 1695 private static final String KEY_MIN_EXPOSURE_COMPENSATION = "min-exposure-compensation"; 1696 private static final String KEY_EXPOSURE_COMPENSATION_STEP = "exposure-compensation-step"; 1697 private static final String KEY_AUTO_EXPOSURE_LOCK = "auto-exposure-lock"; 1698 private static final String KEY_AUTO_EXPOSURE_LOCK_SUPPORTED = "auto-exposure-lock-supported"; 1699 private static final String KEY_AUTO_WHITEBALANCE_LOCK = "auto-whitebalance-lock"; 1700 private static final String KEY_AUTO_WHITEBALANCE_LOCK_SUPPORTED = "auto-whitebalance-lock-supported"; 1701 private static final String KEY_METERING_AREAS = "metering-areas"; 1702 private static final String KEY_MAX_NUM_METERING_AREAS = "max-num-metering-areas"; 1703 private static final String KEY_ZOOM = "zoom"; 1704 private static final String KEY_MAX_ZOOM = "max-zoom"; 1705 private static final String KEY_ZOOM_RATIOS = "zoom-ratios"; 1706 private static final String KEY_ZOOM_SUPPORTED = "zoom-supported"; 1707 private static final String KEY_SMOOTH_ZOOM_SUPPORTED = "smooth-zoom-supported"; 1708 private static final String KEY_FOCUS_DISTANCES = "focus-distances"; 1709 private static final String KEY_VIDEO_SIZE = "video-size"; 1710 private static final String KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO = 1711 "preferred-preview-size-for-video"; 1712 private static final String KEY_MAX_NUM_DETECTED_FACES_HW = "max-num-detected-faces-hw"; 1713 private static final String KEY_MAX_NUM_DETECTED_FACES_SW = "max-num-detected-faces-sw"; 1714 private static final String KEY_RECORDING_HINT = "recording-hint"; 1715 private static final String KEY_VIDEO_SNAPSHOT_SUPPORTED = "video-snapshot-supported"; 1716 private static final String KEY_VIDEO_STABILIZATION = "video-stabilization"; 1717 private static final String KEY_VIDEO_STABILIZATION_SUPPORTED = "video-stabilization-supported"; 1718 1719 // Parameter key suffix for supported values. 1720 private static final String SUPPORTED_VALUES_SUFFIX = "-values"; 1721 1722 private static final String TRUE = "true"; 1723 private static final String FALSE = "false"; 1724 1725 // Values for white balance settings. 1726 public static final String WHITE_BALANCE_AUTO = "auto"; 1727 public static final String WHITE_BALANCE_INCANDESCENT = "incandescent"; 1728 public static final String WHITE_BALANCE_FLUORESCENT = "fluorescent"; 1729 public static final String WHITE_BALANCE_WARM_FLUORESCENT = "warm-fluorescent"; 1730 public static final String WHITE_BALANCE_DAYLIGHT = "daylight"; 1731 public static final String WHITE_BALANCE_CLOUDY_DAYLIGHT = "cloudy-daylight"; 1732 public static final String WHITE_BALANCE_TWILIGHT = "twilight"; 1733 public static final String WHITE_BALANCE_SHADE = "shade"; 1734 1735 // Values for color effect settings. 1736 public static final String EFFECT_NONE = "none"; 1737 public static final String EFFECT_MONO = "mono"; 1738 public static final String EFFECT_NEGATIVE = "negative"; 1739 public static final String EFFECT_SOLARIZE = "solarize"; 1740 public static final String EFFECT_SEPIA = "sepia"; 1741 public static final String EFFECT_POSTERIZE = "posterize"; 1742 public static final String EFFECT_WHITEBOARD = "whiteboard"; 1743 public static final String EFFECT_BLACKBOARD = "blackboard"; 1744 public static final String EFFECT_AQUA = "aqua"; 1745 1746 // Values for antibanding settings. 1747 public static final String ANTIBANDING_AUTO = "auto"; 1748 public static final String ANTIBANDING_50HZ = "50hz"; 1749 public static final String ANTIBANDING_60HZ = "60hz"; 1750 public static final String ANTIBANDING_OFF = "off"; 1751 1752 // Values for flash mode settings. 1753 /** 1754 * Flash will not be fired. 1755 */ 1756 public static final String FLASH_MODE_OFF = "off"; 1757 1758 /** 1759 * Flash will be fired automatically when required. The flash may be fired 1760 * during preview, auto-focus, or snapshot depending on the driver. 1761 */ 1762 public static final String FLASH_MODE_AUTO = "auto"; 1763 1764 /** 1765 * Flash will always be fired during snapshot. The flash may also be 1766 * fired during preview or auto-focus depending on the driver. 1767 */ 1768 public static final String FLASH_MODE_ON = "on"; 1769 1770 /** 1771 * Flash will be fired in red-eye reduction mode. 1772 */ 1773 public static final String FLASH_MODE_RED_EYE = "red-eye"; 1774 1775 /** 1776 * Constant emission of light during preview, auto-focus and snapshot. 1777 * This can also be used for video recording. 1778 */ 1779 public static final String FLASH_MODE_TORCH = "torch"; 1780 1781 /** 1782 * Scene mode is off. 1783 */ 1784 public static final String SCENE_MODE_AUTO = "auto"; 1785 1786 /** 1787 * Take photos of fast moving objects. Same as {@link 1788 * #SCENE_MODE_SPORTS}. 1789 */ 1790 public static final String SCENE_MODE_ACTION = "action"; 1791 1792 /** 1793 * Take people pictures. 1794 */ 1795 public static final String SCENE_MODE_PORTRAIT = "portrait"; 1796 1797 /** 1798 * Take pictures on distant objects. 1799 */ 1800 public static final String SCENE_MODE_LANDSCAPE = "landscape"; 1801 1802 /** 1803 * Take photos at night. 1804 */ 1805 public static final String SCENE_MODE_NIGHT = "night"; 1806 1807 /** 1808 * Take people pictures at night. 1809 */ 1810 public static final String SCENE_MODE_NIGHT_PORTRAIT = "night-portrait"; 1811 1812 /** 1813 * Take photos in a theater. Flash light is off. 1814 */ 1815 public static final String SCENE_MODE_THEATRE = "theatre"; 1816 1817 /** 1818 * Take pictures on the beach. 1819 */ 1820 public static final String SCENE_MODE_BEACH = "beach"; 1821 1822 /** 1823 * Take pictures on the snow. 1824 */ 1825 public static final String SCENE_MODE_SNOW = "snow"; 1826 1827 /** 1828 * Take sunset photos. 1829 */ 1830 public static final String SCENE_MODE_SUNSET = "sunset"; 1831 1832 /** 1833 * Avoid blurry pictures (for example, due to hand shake). 1834 */ 1835 public static final String SCENE_MODE_STEADYPHOTO = "steadyphoto"; 1836 1837 /** 1838 * For shooting firework displays. 1839 */ 1840 public static final String SCENE_MODE_FIREWORKS = "fireworks"; 1841 1842 /** 1843 * Take photos of fast moving objects. Same as {@link 1844 * #SCENE_MODE_ACTION}. 1845 */ 1846 public static final String SCENE_MODE_SPORTS = "sports"; 1847 1848 /** 1849 * Take indoor low-light shot. 1850 */ 1851 public static final String SCENE_MODE_PARTY = "party"; 1852 1853 /** 1854 * Capture the naturally warm color of scenes lit by candles. 1855 */ 1856 public static final String SCENE_MODE_CANDLELIGHT = "candlelight"; 1857 1858 /** 1859 * Applications are looking for a barcode. Camera driver will be 1860 * optimized for barcode reading. 1861 */ 1862 public static final String SCENE_MODE_BARCODE = "barcode"; 1863 1864 /** 1865 * Capture a scene using high dynamic range imaging techniques. The 1866 * camera will return an image that has an extended dynamic range 1867 * compared to a regular capture. Capturing such an image may take 1868 * longer than a regular capture. 1869 */ 1870 public static final String SCENE_MODE_HDR = "hdr"; 1871 1872 /** 1873 * Auto-focus mode. Applications should call {@link 1874 * #autoFocus(AutoFocusCallback)} to start the focus in this mode. 1875 */ 1876 public static final String FOCUS_MODE_AUTO = "auto"; 1877 1878 /** 1879 * Focus is set at infinity. Applications should not call 1880 * {@link #autoFocus(AutoFocusCallback)} in this mode. 1881 */ 1882 public static final String FOCUS_MODE_INFINITY = "infinity"; 1883 1884 /** 1885 * Macro (close-up) focus mode. Applications should call 1886 * {@link #autoFocus(AutoFocusCallback)} to start the focus in this 1887 * mode. 1888 */ 1889 public static final String FOCUS_MODE_MACRO = "macro"; 1890 1891 /** 1892 * Focus is fixed. The camera is always in this mode if the focus is not 1893 * adjustable. If the camera has auto-focus, this mode can fix the 1894 * focus, which is usually at hyperfocal distance. Applications should 1895 * not call {@link #autoFocus(AutoFocusCallback)} in this mode. 1896 */ 1897 public static final String FOCUS_MODE_FIXED = "fixed"; 1898 1899 /** 1900 * Extended depth of field (EDOF). Focusing is done digitally and 1901 * continuously. Applications should not call {@link 1902 * #autoFocus(AutoFocusCallback)} in this mode. 1903 */ 1904 public static final String FOCUS_MODE_EDOF = "edof"; 1905 1906 /** 1907 * Continuous auto focus mode intended for video recording. The camera 1908 * continuously tries to focus. This is the best choice for video 1909 * recording because the focus changes smoothly . Applications still can 1910 * call {@link #takePicture(Camera.ShutterCallback, 1911 * Camera.PictureCallback, Camera.PictureCallback)} in this mode but the 1912 * subject may not be in focus. Auto focus starts when the parameter is 1913 * set. 1914 * 1915 * <p>Since API level 14, applications can call {@link 1916 * #autoFocus(AutoFocusCallback)} in this mode. The focus callback will 1917 * immediately return with a boolean that indicates whether the focus is 1918 * sharp or not. The focus position is locked after autoFocus call. If 1919 * applications want to resume the continuous focus, cancelAutoFocus 1920 * must be called. Restarting the preview will not resume the continuous 1921 * autofocus. To stop continuous focus, applications should change the 1922 * focus mode to other modes. 1923 * 1924 * @see #FOCUS_MODE_CONTINUOUS_PICTURE 1925 */ 1926 public static final String FOCUS_MODE_CONTINUOUS_VIDEO = "continuous-video"; 1927 1928 /** 1929 * Continuous auto focus mode intended for taking pictures. The camera 1930 * continuously tries to focus. The speed of focus change is more 1931 * aggressive than {@link #FOCUS_MODE_CONTINUOUS_VIDEO}. Auto focus 1932 * starts when the parameter is set. 1933 * 1934 * <p>Applications can call {@link #autoFocus(AutoFocusCallback)} in 1935 * this mode. If the autofocus is in the middle of scanning, the focus 1936 * callback will return when it completes. If the autofocus is not 1937 * scanning, the focus callback will immediately return with a boolean 1938 * that indicates whether the focus is sharp or not. The apps can then 1939 * decide if they want to take a picture immediately or to change the 1940 * focus mode to auto, and run a full autofocus cycle. The focus 1941 * position is locked after autoFocus call. If applications want to 1942 * resume the continuous focus, cancelAutoFocus must be called. 1943 * Restarting the preview will not resume the continuous autofocus. To 1944 * stop continuous focus, applications should change the focus mode to 1945 * other modes. 1946 * 1947 * @see #FOCUS_MODE_CONTINUOUS_VIDEO 1948 */ 1949 public static final String FOCUS_MODE_CONTINUOUS_PICTURE = "continuous-picture"; 1950 1951 // Indices for focus distance array. 1952 /** 1953 * The array index of near focus distance for use with 1954 * {@link #getFocusDistances(float[])}. 1955 */ 1956 public static final int FOCUS_DISTANCE_NEAR_INDEX = 0; 1957 1958 /** 1959 * The array index of optimal focus distance for use with 1960 * {@link #getFocusDistances(float[])}. 1961 */ 1962 public static final int FOCUS_DISTANCE_OPTIMAL_INDEX = 1; 1963 1964 /** 1965 * The array index of far focus distance for use with 1966 * {@link #getFocusDistances(float[])}. 1967 */ 1968 public static final int FOCUS_DISTANCE_FAR_INDEX = 2; 1969 1970 /** 1971 * The array index of minimum preview fps for use with {@link 1972 * #getPreviewFpsRange(int[])} or {@link 1973 * #getSupportedPreviewFpsRange()}. 1974 */ 1975 public static final int PREVIEW_FPS_MIN_INDEX = 0; 1976 1977 /** 1978 * The array index of maximum preview fps for use with {@link 1979 * #getPreviewFpsRange(int[])} or {@link 1980 * #getSupportedPreviewFpsRange()}. 1981 */ 1982 public static final int PREVIEW_FPS_MAX_INDEX = 1; 1983 1984 // Formats for setPreviewFormat and setPictureFormat. 1985 private static final String PIXEL_FORMAT_YUV422SP = "yuv422sp"; 1986 private static final String PIXEL_FORMAT_YUV420SP = "yuv420sp"; 1987 private static final String PIXEL_FORMAT_YUV422I = "yuv422i-yuyv"; 1988 private static final String PIXEL_FORMAT_YUV420P = "yuv420p"; 1989 private static final String PIXEL_FORMAT_RGB565 = "rgb565"; 1990 private static final String PIXEL_FORMAT_JPEG = "jpeg"; 1991 private static final String PIXEL_FORMAT_BAYER_RGGB = "bayer-rggb"; 1992 1993 private HashMap<String, String> mMap; 1994 1995 private Parameters() { 1996 mMap = new HashMap<String, String>(64); 1997 } 1998 1999 /** 2000 * Writes the current Parameters to the log. 2001 * @hide 2002 * @deprecated 2003 */ 2004 public void dump() { 2005 Log.e(TAG, "dump: size=" + mMap.size()); 2006 for (String k : mMap.keySet()) { 2007 Log.e(TAG, "dump: " + k + "=" + mMap.get(k)); 2008 } 2009 } 2010 2011 /** 2012 * Creates a single string with all the parameters set in 2013 * this Parameters object. 2014 * <p>The {@link #unflatten(String)} method does the reverse.</p> 2015 * 2016 * @return a String with all values from this Parameters object, in 2017 * semi-colon delimited key-value pairs 2018 */ 2019 public String flatten() { 2020 StringBuilder flattened = new StringBuilder(128); 2021 for (String k : mMap.keySet()) { 2022 flattened.append(k); 2023 flattened.append("="); 2024 flattened.append(mMap.get(k)); 2025 flattened.append(";"); 2026 } 2027 // chop off the extra semicolon at the end 2028 flattened.deleteCharAt(flattened.length()-1); 2029 return flattened.toString(); 2030 } 2031 2032 /** 2033 * Takes a flattened string of parameters and adds each one to 2034 * this Parameters object. 2035 * <p>The {@link #flatten()} method does the reverse.</p> 2036 * 2037 * @param flattened a String of parameters (key-value paired) that 2038 * are semi-colon delimited 2039 */ 2040 public void unflatten(String flattened) { 2041 mMap.clear(); 2042 2043 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(';'); 2044 splitter.setString(flattened); 2045 for (String kv : splitter) { 2046 int pos = kv.indexOf('='); 2047 if (pos == -1) { 2048 continue; 2049 } 2050 String k = kv.substring(0, pos); 2051 String v = kv.substring(pos + 1); 2052 mMap.put(k, v); 2053 } 2054 } 2055 2056 public void remove(String key) { 2057 mMap.remove(key); 2058 } 2059 2060 /** 2061 * Sets a String parameter. 2062 * 2063 * @param key the key name for the parameter 2064 * @param value the String value of the parameter 2065 */ 2066 public void set(String key, String value) { 2067 if (key.indexOf('=') != -1 || key.indexOf(';') != -1 || key.indexOf(0) != -1) { 2068 Log.e(TAG, "Key \"" + key + "\" contains invalid character (= or ; or \\0)"); 2069 return; 2070 } 2071 if (value.indexOf('=') != -1 || value.indexOf(';') != -1 || value.indexOf(0) != -1) { 2072 Log.e(TAG, "Value \"" + value + "\" contains invalid character (= or ; or \\0)"); 2073 return; 2074 } 2075 2076 mMap.put(key, value); 2077 } 2078 2079 /** 2080 * Sets an integer parameter. 2081 * 2082 * @param key the key name for the parameter 2083 * @param value the int value of the parameter 2084 */ 2085 public void set(String key, int value) { 2086 mMap.put(key, Integer.toString(value)); 2087 } 2088 2089 private void set(String key, List<Area> areas) { 2090 if (areas == null) { 2091 set(key, "(0,0,0,0,0)"); 2092 } else { 2093 StringBuilder buffer = new StringBuilder(); 2094 for (int i = 0; i < areas.size(); i++) { 2095 Area area = areas.get(i); 2096 Rect rect = area.rect; 2097 buffer.append('('); 2098 buffer.append(rect.left); 2099 buffer.append(','); 2100 buffer.append(rect.top); 2101 buffer.append(','); 2102 buffer.append(rect.right); 2103 buffer.append(','); 2104 buffer.append(rect.bottom); 2105 buffer.append(','); 2106 buffer.append(area.weight); 2107 buffer.append(')'); 2108 if (i != areas.size() - 1) buffer.append(','); 2109 } 2110 set(key, buffer.toString()); 2111 } 2112 } 2113 2114 /** 2115 * Returns the value of a String parameter. 2116 * 2117 * @param key the key name for the parameter 2118 * @return the String value of the parameter 2119 */ 2120 public String get(String key) { 2121 return mMap.get(key); 2122 } 2123 2124 /** 2125 * Returns the value of an integer parameter. 2126 * 2127 * @param key the key name for the parameter 2128 * @return the int value of the parameter 2129 */ 2130 public int getInt(String key) { 2131 return Integer.parseInt(mMap.get(key)); 2132 } 2133 2134 /** 2135 * Sets the dimensions for preview pictures. If the preview has already 2136 * started, applications should stop the preview first before changing 2137 * preview size. 2138 * 2139 * The sides of width and height are based on camera orientation. That 2140 * is, the preview size is the size before it is rotated by display 2141 * orientation. So applications need to consider the display orientation 2142 * while setting preview size. For example, suppose the camera supports 2143 * both 480x320 and 320x480 preview sizes. The application wants a 3:2 2144 * preview ratio. If the display orientation is set to 0 or 180, preview 2145 * size should be set to 480x320. If the display orientation is set to 2146 * 90 or 270, preview size should be set to 320x480. The display 2147 * orientation should also be considered while setting picture size and 2148 * thumbnail size. 2149 * 2150 * @param width the width of the pictures, in pixels 2151 * @param height the height of the pictures, in pixels 2152 * @see #setDisplayOrientation(int) 2153 * @see #getCameraInfo(int, CameraInfo) 2154 * @see #setPictureSize(int, int) 2155 * @see #setJpegThumbnailSize(int, int) 2156 */ 2157 public void setPreviewSize(int width, int height) { 2158 String v = Integer.toString(width) + "x" + Integer.toString(height); 2159 set(KEY_PREVIEW_SIZE, v); 2160 } 2161 2162 /** 2163 * Returns the dimensions setting for preview pictures. 2164 * 2165 * @return a Size object with the width and height setting 2166 * for the preview picture 2167 */ 2168 public Size getPreviewSize() { 2169 String pair = get(KEY_PREVIEW_SIZE); 2170 return strToSize(pair); 2171 } 2172 2173 /** 2174 * Gets the supported preview sizes. 2175 * 2176 * @return a list of Size object. This method will always return a list 2177 * with at least one element. 2178 */ 2179 public List<Size> getSupportedPreviewSizes() { 2180 String str = get(KEY_PREVIEW_SIZE + SUPPORTED_VALUES_SUFFIX); 2181 return splitSize(str); 2182 } 2183 2184 /** 2185 * <p>Gets the supported video frame sizes that can be used by 2186 * MediaRecorder.</p> 2187 * 2188 * <p>If the returned list is not null, the returned list will contain at 2189 * least one Size and one of the sizes in the returned list must be 2190 * passed to MediaRecorder.setVideoSize() for camcorder application if 2191 * camera is used as the video source. In this case, the size of the 2192 * preview can be different from the resolution of the recorded video 2193 * during video recording.</p> 2194 * 2195 * @return a list of Size object if camera has separate preview and 2196 * video output; otherwise, null is returned. 2197 * @see #getPreferredPreviewSizeForVideo() 2198 */ 2199 public List<Size> getSupportedVideoSizes() { 2200 String str = get(KEY_VIDEO_SIZE + SUPPORTED_VALUES_SUFFIX); 2201 return splitSize(str); 2202 } 2203 2204 /** 2205 * Returns the preferred or recommended preview size (width and height) 2206 * in pixels for video recording. Camcorder applications should 2207 * set the preview size to a value that is not larger than the 2208 * preferred preview size. In other words, the product of the width 2209 * and height of the preview size should not be larger than that of 2210 * the preferred preview size. In addition, we recommend to choose a 2211 * preview size that has the same aspect ratio as the resolution of 2212 * video to be recorded. 2213 * 2214 * @return the preferred preview size (width and height) in pixels for 2215 * video recording if getSupportedVideoSizes() does not return 2216 * null; otherwise, null is returned. 2217 * @see #getSupportedVideoSizes() 2218 */ 2219 public Size getPreferredPreviewSizeForVideo() { 2220 String pair = get(KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO); 2221 return strToSize(pair); 2222 } 2223 2224 /** 2225 * <p>Sets the dimensions for EXIF thumbnail in Jpeg picture. If 2226 * applications set both width and height to 0, EXIF will not contain 2227 * thumbnail.</p> 2228 * 2229 * <p>Applications need to consider the display orientation. See {@link 2230 * #setPreviewSize(int,int)} for reference.</p> 2231 * 2232 * @param width the width of the thumbnail, in pixels 2233 * @param height the height of the thumbnail, in pixels 2234 * @see #setPreviewSize(int,int) 2235 */ 2236 public void setJpegThumbnailSize(int width, int height) { 2237 set(KEY_JPEG_THUMBNAIL_WIDTH, width); 2238 set(KEY_JPEG_THUMBNAIL_HEIGHT, height); 2239 } 2240 2241 /** 2242 * Returns the dimensions for EXIF thumbnail in Jpeg picture. 2243 * 2244 * @return a Size object with the height and width setting for the EXIF 2245 * thumbnails 2246 */ 2247 public Size getJpegThumbnailSize() { 2248 return new Size(getInt(KEY_JPEG_THUMBNAIL_WIDTH), 2249 getInt(KEY_JPEG_THUMBNAIL_HEIGHT)); 2250 } 2251 2252 /** 2253 * Gets the supported jpeg thumbnail sizes. 2254 * 2255 * @return a list of Size object. This method will always return a list 2256 * with at least two elements. Size 0,0 (no thumbnail) is always 2257 * supported. 2258 */ 2259 public List<Size> getSupportedJpegThumbnailSizes() { 2260 String str = get(KEY_JPEG_THUMBNAIL_SIZE + SUPPORTED_VALUES_SUFFIX); 2261 return splitSize(str); 2262 } 2263 2264 /** 2265 * Sets the quality of the EXIF thumbnail in Jpeg picture. 2266 * 2267 * @param quality the JPEG quality of the EXIF thumbnail. The range is 1 2268 * to 100, with 100 being the best. 2269 */ 2270 public void setJpegThumbnailQuality(int quality) { 2271 set(KEY_JPEG_THUMBNAIL_QUALITY, quality); 2272 } 2273 2274 /** 2275 * Returns the quality setting for the EXIF thumbnail in Jpeg picture. 2276 * 2277 * @return the JPEG quality setting of the EXIF thumbnail. 2278 */ 2279 public int getJpegThumbnailQuality() { 2280 return getInt(KEY_JPEG_THUMBNAIL_QUALITY); 2281 } 2282 2283 /** 2284 * Sets Jpeg quality of captured picture. 2285 * 2286 * @param quality the JPEG quality of captured picture. The range is 1 2287 * to 100, with 100 being the best. 2288 */ 2289 public void setJpegQuality(int quality) { 2290 set(KEY_JPEG_QUALITY, quality); 2291 } 2292 2293 /** 2294 * Returns the quality setting for the JPEG picture. 2295 * 2296 * @return the JPEG picture quality setting. 2297 */ 2298 public int getJpegQuality() { 2299 return getInt(KEY_JPEG_QUALITY); 2300 } 2301 2302 /** 2303 * Sets the rate at which preview frames are received. This is the 2304 * target frame rate. The actual frame rate depends on the driver. 2305 * 2306 * @param fps the frame rate (frames per second) 2307 * @deprecated replaced by {@link #setPreviewFpsRange(int,int)} 2308 */ 2309 @Deprecated 2310 public void setPreviewFrameRate(int fps) { 2311 set(KEY_PREVIEW_FRAME_RATE, fps); 2312 } 2313 2314 /** 2315 * Returns the setting for the rate at which preview frames are 2316 * received. This is the target frame rate. The actual frame rate 2317 * depends on the driver. 2318 * 2319 * @return the frame rate setting (frames per second) 2320 * @deprecated replaced by {@link #getPreviewFpsRange(int[])} 2321 */ 2322 @Deprecated 2323 public int getPreviewFrameRate() { 2324 return getInt(KEY_PREVIEW_FRAME_RATE); 2325 } 2326 2327 /** 2328 * Gets the supported preview frame rates. 2329 * 2330 * @return a list of supported preview frame rates. null if preview 2331 * frame rate setting is not supported. 2332 * @deprecated replaced by {@link #getSupportedPreviewFpsRange()} 2333 */ 2334 @Deprecated 2335 public List<Integer> getSupportedPreviewFrameRates() { 2336 String str = get(KEY_PREVIEW_FRAME_RATE + SUPPORTED_VALUES_SUFFIX); 2337 return splitInt(str); 2338 } 2339 2340 /** 2341 * Sets the minimum and maximum preview fps. This controls the rate of 2342 * preview frames received in {@link PreviewCallback}. The minimum and 2343 * maximum preview fps must be one of the elements from {@link 2344 * #getSupportedPreviewFpsRange}. 2345 * 2346 * @param min the minimum preview fps (scaled by 1000). 2347 * @param max the maximum preview fps (scaled by 1000). 2348 * @throws RuntimeException if fps range is invalid. 2349 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 2350 * @see #getSupportedPreviewFpsRange() 2351 */ 2352 public void setPreviewFpsRange(int min, int max) { 2353 set(KEY_PREVIEW_FPS_RANGE, "" + min + "," + max); 2354 } 2355 2356 /** 2357 * Returns the current minimum and maximum preview fps. The values are 2358 * one of the elements returned by {@link #getSupportedPreviewFpsRange}. 2359 * 2360 * @return range the minimum and maximum preview fps (scaled by 1000). 2361 * @see #PREVIEW_FPS_MIN_INDEX 2362 * @see #PREVIEW_FPS_MAX_INDEX 2363 * @see #getSupportedPreviewFpsRange() 2364 */ 2365 public void getPreviewFpsRange(int[] range) { 2366 if (range == null || range.length != 2) { 2367 throw new IllegalArgumentException( 2368 "range must be an array with two elements."); 2369 } 2370 splitInt(get(KEY_PREVIEW_FPS_RANGE), range); 2371 } 2372 2373 /** 2374 * Gets the supported preview fps (frame-per-second) ranges. Each range 2375 * contains a minimum fps and maximum fps. If minimum fps equals to 2376 * maximum fps, the camera outputs frames in fixed frame rate. If not, 2377 * the camera outputs frames in auto frame rate. The actual frame rate 2378 * fluctuates between the minimum and the maximum. The values are 2379 * multiplied by 1000 and represented in integers. For example, if frame 2380 * rate is 26.623 frames per second, the value is 26623. 2381 * 2382 * @return a list of supported preview fps ranges. This method returns a 2383 * list with at least one element. Every element is an int array 2384 * of two values - minimum fps and maximum fps. The list is 2385 * sorted from small to large (first by maximum fps and then 2386 * minimum fps). 2387 * @see #PREVIEW_FPS_MIN_INDEX 2388 * @see #PREVIEW_FPS_MAX_INDEX 2389 */ 2390 public List<int[]> getSupportedPreviewFpsRange() { 2391 String str = get(KEY_PREVIEW_FPS_RANGE + SUPPORTED_VALUES_SUFFIX); 2392 return splitRange(str); 2393 } 2394 2395 /** 2396 * Sets the image format for preview pictures. 2397 * <p>If this is never called, the default format will be 2398 * {@link android.graphics.ImageFormat#NV21}, which 2399 * uses the NV21 encoding format.</p> 2400 * 2401 * <p>Use {@link Parameters#getSupportedPreviewFormats} to get a list of 2402 * the available preview formats. 2403 * 2404 * <p>It is strongly recommended that either 2405 * {@link android.graphics.ImageFormat#NV21} or 2406 * {@link android.graphics.ImageFormat#YV12} is used, since 2407 * they are supported by all camera devices.</p> 2408 * 2409 * <p>For YV12, the image buffer that is received is not necessarily 2410 * tightly packed, as there may be padding at the end of each row of 2411 * pixel data, as described in 2412 * {@link android.graphics.ImageFormat#YV12}. For camera callback data, 2413 * it can be assumed that the stride of the Y and UV data is the 2414 * smallest possible that meets the alignment requirements. That is, if 2415 * the preview size is <var>width x height</var>, then the following 2416 * equations describe the buffer index for the beginning of row 2417 * <var>y</var> for the Y plane and row <var>c</var> for the U and V 2418 * planes: 2419 * 2420 * {@code 2421 * <pre> 2422 * yStride = (int) ceil(width / 16.0) * 16; 2423 * uvStride = (int) ceil( (yStride / 2) / 16.0) * 16; 2424 * ySize = yStride * height; 2425 * uvSize = uvStride * height / 2; 2426 * yRowIndex = yStride * y; 2427 * uRowIndex = ySize + uvSize + uvStride * c; 2428 * vRowIndex = ySize + uvStride * c; 2429 * size = ySize + uvSize * 2;</pre> 2430 * } 2431 * 2432 * @param pixel_format the desired preview picture format, defined by 2433 * one of the {@link android.graphics.ImageFormat} constants. (E.g., 2434 * <var>ImageFormat.NV21</var> (default), or 2435 * <var>ImageFormat.YV12</var>) 2436 * 2437 * @see android.graphics.ImageFormat 2438 * @see android.hardware.Camera.Parameters#getSupportedPreviewFormats 2439 */ 2440 public void setPreviewFormat(int pixel_format) { 2441 String s = cameraFormatForPixelFormat(pixel_format); 2442 if (s == null) { 2443 throw new IllegalArgumentException( 2444 "Invalid pixel_format=" + pixel_format); 2445 } 2446 2447 set(KEY_PREVIEW_FORMAT, s); 2448 } 2449 2450 /** 2451 * Returns the image format for preview frames got from 2452 * {@link PreviewCallback}. 2453 * 2454 * @return the preview format. 2455 * @see android.graphics.ImageFormat 2456 * @see #setPreviewFormat 2457 */ 2458 public int getPreviewFormat() { 2459 return pixelFormatForCameraFormat(get(KEY_PREVIEW_FORMAT)); 2460 } 2461 2462 /** 2463 * Gets the supported preview formats. {@link android.graphics.ImageFormat#NV21} 2464 * is always supported. {@link android.graphics.ImageFormat#YV12} 2465 * is always supported since API level 12. 2466 * 2467 * @return a list of supported preview formats. This method will always 2468 * return a list with at least one element. 2469 * @see android.graphics.ImageFormat 2470 * @see #setPreviewFormat 2471 */ 2472 public List<Integer> getSupportedPreviewFormats() { 2473 String str = get(KEY_PREVIEW_FORMAT + SUPPORTED_VALUES_SUFFIX); 2474 ArrayList<Integer> formats = new ArrayList<Integer>(); 2475 for (String s : split(str)) { 2476 int f = pixelFormatForCameraFormat(s); 2477 if (f == ImageFormat.UNKNOWN) continue; 2478 formats.add(f); 2479 } 2480 return formats; 2481 } 2482 2483 /** 2484 * <p>Sets the dimensions for pictures.</p> 2485 * 2486 * <p>Applications need to consider the display orientation. See {@link 2487 * #setPreviewSize(int,int)} for reference.</p> 2488 * 2489 * @param width the width for pictures, in pixels 2490 * @param height the height for pictures, in pixels 2491 * @see #setPreviewSize(int,int) 2492 * 2493 */ 2494 public void setPictureSize(int width, int height) { 2495 String v = Integer.toString(width) + "x" + Integer.toString(height); 2496 set(KEY_PICTURE_SIZE, v); 2497 } 2498 2499 /** 2500 * Returns the dimension setting for pictures. 2501 * 2502 * @return a Size object with the height and width setting 2503 * for pictures 2504 */ 2505 public Size getPictureSize() { 2506 String pair = get(KEY_PICTURE_SIZE); 2507 return strToSize(pair); 2508 } 2509 2510 /** 2511 * Gets the supported picture sizes. 2512 * 2513 * @return a list of supported picture sizes. This method will always 2514 * return a list with at least one element. 2515 */ 2516 public List<Size> getSupportedPictureSizes() { 2517 String str = get(KEY_PICTURE_SIZE + SUPPORTED_VALUES_SUFFIX); 2518 return splitSize(str); 2519 } 2520 2521 /** 2522 * Sets the image format for pictures. 2523 * 2524 * @param pixel_format the desired picture format 2525 * (<var>ImageFormat.NV21</var>, 2526 * <var>ImageFormat.RGB_565</var>, or 2527 * <var>ImageFormat.JPEG</var>) 2528 * @see android.graphics.ImageFormat 2529 */ 2530 public void setPictureFormat(int pixel_format) { 2531 String s = cameraFormatForPixelFormat(pixel_format); 2532 if (s == null) { 2533 throw new IllegalArgumentException( 2534 "Invalid pixel_format=" + pixel_format); 2535 } 2536 2537 set(KEY_PICTURE_FORMAT, s); 2538 } 2539 2540 /** 2541 * Returns the image format for pictures. 2542 * 2543 * @return the picture format 2544 * @see android.graphics.ImageFormat 2545 */ 2546 public int getPictureFormat() { 2547 return pixelFormatForCameraFormat(get(KEY_PICTURE_FORMAT)); 2548 } 2549 2550 /** 2551 * Gets the supported picture formats. 2552 * 2553 * @return supported picture formats. This method will always return a 2554 * list with at least one element. 2555 * @see android.graphics.ImageFormat 2556 */ 2557 public List<Integer> getSupportedPictureFormats() { 2558 String str = get(KEY_PICTURE_FORMAT + SUPPORTED_VALUES_SUFFIX); 2559 ArrayList<Integer> formats = new ArrayList<Integer>(); 2560 for (String s : split(str)) { 2561 int f = pixelFormatForCameraFormat(s); 2562 if (f == ImageFormat.UNKNOWN) continue; 2563 formats.add(f); 2564 } 2565 return formats; 2566 } 2567 2568 private String cameraFormatForPixelFormat(int pixel_format) { 2569 switch(pixel_format) { 2570 case ImageFormat.NV16: return PIXEL_FORMAT_YUV422SP; 2571 case ImageFormat.NV21: return PIXEL_FORMAT_YUV420SP; 2572 case ImageFormat.YUY2: return PIXEL_FORMAT_YUV422I; 2573 case ImageFormat.YV12: return PIXEL_FORMAT_YUV420P; 2574 case ImageFormat.RGB_565: return PIXEL_FORMAT_RGB565; 2575 case ImageFormat.JPEG: return PIXEL_FORMAT_JPEG; 2576 case ImageFormat.BAYER_RGGB: return PIXEL_FORMAT_BAYER_RGGB; 2577 default: return null; 2578 } 2579 } 2580 2581 private int pixelFormatForCameraFormat(String format) { 2582 if (format == null) 2583 return ImageFormat.UNKNOWN; 2584 2585 if (format.equals(PIXEL_FORMAT_YUV422SP)) 2586 return ImageFormat.NV16; 2587 2588 if (format.equals(PIXEL_FORMAT_YUV420SP)) 2589 return ImageFormat.NV21; 2590 2591 if (format.equals(PIXEL_FORMAT_YUV422I)) 2592 return ImageFormat.YUY2; 2593 2594 if (format.equals(PIXEL_FORMAT_YUV420P)) 2595 return ImageFormat.YV12; 2596 2597 if (format.equals(PIXEL_FORMAT_RGB565)) 2598 return ImageFormat.RGB_565; 2599 2600 if (format.equals(PIXEL_FORMAT_JPEG)) 2601 return ImageFormat.JPEG; 2602 2603 return ImageFormat.UNKNOWN; 2604 } 2605 2606 /** 2607 * Sets the clockwise rotation angle in degrees relative to the 2608 * orientation of the camera. This affects the pictures returned from 2609 * JPEG {@link PictureCallback}. The camera driver may set orientation 2610 * in the EXIF header without rotating the picture. Or the driver may 2611 * rotate the picture and the EXIF thumbnail. If the Jpeg picture is 2612 * rotated, the orientation in the EXIF header will be missing or 1 2613 * (row #0 is top and column #0 is left side). 2614 * 2615 * <p>If applications want to rotate the picture to match the orientation 2616 * of what users see, apps should use {@link 2617 * android.view.OrientationEventListener} and {@link CameraInfo}. 2618 * The value from OrientationEventListener is relative to the natural 2619 * orientation of the device. CameraInfo.orientation is the angle 2620 * between camera orientation and natural device orientation. The sum 2621 * of the two is the rotation angle for back-facing camera. The 2622 * difference of the two is the rotation angle for front-facing camera. 2623 * Note that the JPEG pictures of front-facing cameras are not mirrored 2624 * as in preview display. 2625 * 2626 * <p>For example, suppose the natural orientation of the device is 2627 * portrait. The device is rotated 270 degrees clockwise, so the device 2628 * orientation is 270. Suppose a back-facing camera sensor is mounted in 2629 * landscape and the top side of the camera sensor is aligned with the 2630 * right edge of the display in natural orientation. So the camera 2631 * orientation is 90. The rotation should be set to 0 (270 + 90). 2632 * 2633 * <p>The reference code is as follows. 2634 * 2635 * <pre> 2636 * public void onOrientationChanged(int orientation) { 2637 * if (orientation == ORIENTATION_UNKNOWN) return; 2638 * android.hardware.Camera.CameraInfo info = 2639 * new android.hardware.Camera.CameraInfo(); 2640 * android.hardware.Camera.getCameraInfo(cameraId, info); 2641 * orientation = (orientation + 45) / 90 * 90; 2642 * int rotation = 0; 2643 * if (info.facing == CameraInfo.CAMERA_FACING_FRONT) { 2644 * rotation = (info.orientation - orientation + 360) % 360; 2645 * } else { // back-facing camera 2646 * rotation = (info.orientation + orientation) % 360; 2647 * } 2648 * mParameters.setRotation(rotation); 2649 * } 2650 * </pre> 2651 * 2652 * @param rotation The rotation angle in degrees relative to the 2653 * orientation of the camera. Rotation can only be 0, 2654 * 90, 180 or 270. 2655 * @throws IllegalArgumentException if rotation value is invalid. 2656 * @see android.view.OrientationEventListener 2657 * @see #getCameraInfo(int, CameraInfo) 2658 */ 2659 public void setRotation(int rotation) { 2660 if (rotation == 0 || rotation == 90 || rotation == 180 2661 || rotation == 270) { 2662 set(KEY_ROTATION, Integer.toString(rotation)); 2663 } else { 2664 throw new IllegalArgumentException( 2665 "Invalid rotation=" + rotation); 2666 } 2667 } 2668 2669 /** 2670 * Sets GPS latitude coordinate. This will be stored in JPEG EXIF 2671 * header. 2672 * 2673 * @param latitude GPS latitude coordinate. 2674 */ 2675 public void setGpsLatitude(double latitude) { 2676 set(KEY_GPS_LATITUDE, Double.toString(latitude)); 2677 } 2678 2679 /** 2680 * Sets GPS longitude coordinate. This will be stored in JPEG EXIF 2681 * header. 2682 * 2683 * @param longitude GPS longitude coordinate. 2684 */ 2685 public void setGpsLongitude(double longitude) { 2686 set(KEY_GPS_LONGITUDE, Double.toString(longitude)); 2687 } 2688 2689 /** 2690 * Sets GPS altitude. This will be stored in JPEG EXIF header. 2691 * 2692 * @param altitude GPS altitude in meters. 2693 */ 2694 public void setGpsAltitude(double altitude) { 2695 set(KEY_GPS_ALTITUDE, Double.toString(altitude)); 2696 } 2697 2698 /** 2699 * Sets GPS timestamp. This will be stored in JPEG EXIF header. 2700 * 2701 * @param timestamp GPS timestamp (UTC in seconds since January 1, 2702 * 1970). 2703 */ 2704 public void setGpsTimestamp(long timestamp) { 2705 set(KEY_GPS_TIMESTAMP, Long.toString(timestamp)); 2706 } 2707 2708 /** 2709 * Sets GPS processing method. It will store up to 32 characters 2710 * in JPEG EXIF header. 2711 * 2712 * @param processing_method The processing method to get this location. 2713 */ 2714 public void setGpsProcessingMethod(String processing_method) { 2715 set(KEY_GPS_PROCESSING_METHOD, processing_method); 2716 } 2717 2718 /** 2719 * Removes GPS latitude, longitude, altitude, and timestamp from the 2720 * parameters. 2721 */ 2722 public void removeGpsData() { 2723 remove(KEY_GPS_LATITUDE); 2724 remove(KEY_GPS_LONGITUDE); 2725 remove(KEY_GPS_ALTITUDE); 2726 remove(KEY_GPS_TIMESTAMP); 2727 remove(KEY_GPS_PROCESSING_METHOD); 2728 } 2729 2730 /** 2731 * Gets the current white balance setting. 2732 * 2733 * @return current white balance. null if white balance setting is not 2734 * supported. 2735 * @see #WHITE_BALANCE_AUTO 2736 * @see #WHITE_BALANCE_INCANDESCENT 2737 * @see #WHITE_BALANCE_FLUORESCENT 2738 * @see #WHITE_BALANCE_WARM_FLUORESCENT 2739 * @see #WHITE_BALANCE_DAYLIGHT 2740 * @see #WHITE_BALANCE_CLOUDY_DAYLIGHT 2741 * @see #WHITE_BALANCE_TWILIGHT 2742 * @see #WHITE_BALANCE_SHADE 2743 * 2744 */ 2745 public String getWhiteBalance() { 2746 return get(KEY_WHITE_BALANCE); 2747 } 2748 2749 /** 2750 * Sets the white balance. Changing the setting will release the 2751 * auto-white balance lock. It is recommended not to change white 2752 * balance and AWB lock at the same time. 2753 * 2754 * @param value new white balance. 2755 * @see #getWhiteBalance() 2756 * @see #setAutoWhiteBalanceLock(boolean) 2757 */ 2758 public void setWhiteBalance(String value) { 2759 String oldValue = get(KEY_WHITE_BALANCE); 2760 if (same(value, oldValue)) return; 2761 set(KEY_WHITE_BALANCE, value); 2762 set(KEY_AUTO_WHITEBALANCE_LOCK, FALSE); 2763 } 2764 2765 /** 2766 * Gets the supported white balance. 2767 * 2768 * @return a list of supported white balance. null if white balance 2769 * setting is not supported. 2770 * @see #getWhiteBalance() 2771 */ 2772 public List<String> getSupportedWhiteBalance() { 2773 String str = get(KEY_WHITE_BALANCE + SUPPORTED_VALUES_SUFFIX); 2774 return split(str); 2775 } 2776 2777 /** 2778 * Gets the current color effect setting. 2779 * 2780 * @return current color effect. null if color effect 2781 * setting is not supported. 2782 * @see #EFFECT_NONE 2783 * @see #EFFECT_MONO 2784 * @see #EFFECT_NEGATIVE 2785 * @see #EFFECT_SOLARIZE 2786 * @see #EFFECT_SEPIA 2787 * @see #EFFECT_POSTERIZE 2788 * @see #EFFECT_WHITEBOARD 2789 * @see #EFFECT_BLACKBOARD 2790 * @see #EFFECT_AQUA 2791 */ 2792 public String getColorEffect() { 2793 return get(KEY_EFFECT); 2794 } 2795 2796 /** 2797 * Sets the current color effect setting. 2798 * 2799 * @param value new color effect. 2800 * @see #getColorEffect() 2801 */ 2802 public void setColorEffect(String value) { 2803 set(KEY_EFFECT, value); 2804 } 2805 2806 /** 2807 * Gets the supported color effects. 2808 * 2809 * @return a list of supported color effects. null if color effect 2810 * setting is not supported. 2811 * @see #getColorEffect() 2812 */ 2813 public List<String> getSupportedColorEffects() { 2814 String str = get(KEY_EFFECT + SUPPORTED_VALUES_SUFFIX); 2815 return split(str); 2816 } 2817 2818 2819 /** 2820 * Gets the current antibanding setting. 2821 * 2822 * @return current antibanding. null if antibanding setting is not 2823 * supported. 2824 * @see #ANTIBANDING_AUTO 2825 * @see #ANTIBANDING_50HZ 2826 * @see #ANTIBANDING_60HZ 2827 * @see #ANTIBANDING_OFF 2828 */ 2829 public String getAntibanding() { 2830 return get(KEY_ANTIBANDING); 2831 } 2832 2833 /** 2834 * Sets the antibanding. 2835 * 2836 * @param antibanding new antibanding value. 2837 * @see #getAntibanding() 2838 */ 2839 public void setAntibanding(String antibanding) { 2840 set(KEY_ANTIBANDING, antibanding); 2841 } 2842 2843 /** 2844 * Gets the supported antibanding values. 2845 * 2846 * @return a list of supported antibanding values. null if antibanding 2847 * setting is not supported. 2848 * @see #getAntibanding() 2849 */ 2850 public List<String> getSupportedAntibanding() { 2851 String str = get(KEY_ANTIBANDING + SUPPORTED_VALUES_SUFFIX); 2852 return split(str); 2853 } 2854 2855 /** 2856 * Gets the current scene mode setting. 2857 * 2858 * @return one of SCENE_MODE_XXX string constant. null if scene mode 2859 * setting is not supported. 2860 * @see #SCENE_MODE_AUTO 2861 * @see #SCENE_MODE_ACTION 2862 * @see #SCENE_MODE_PORTRAIT 2863 * @see #SCENE_MODE_LANDSCAPE 2864 * @see #SCENE_MODE_NIGHT 2865 * @see #SCENE_MODE_NIGHT_PORTRAIT 2866 * @see #SCENE_MODE_THEATRE 2867 * @see #SCENE_MODE_BEACH 2868 * @see #SCENE_MODE_SNOW 2869 * @see #SCENE_MODE_SUNSET 2870 * @see #SCENE_MODE_STEADYPHOTO 2871 * @see #SCENE_MODE_FIREWORKS 2872 * @see #SCENE_MODE_SPORTS 2873 * @see #SCENE_MODE_PARTY 2874 * @see #SCENE_MODE_CANDLELIGHT 2875 * @see #SCENE_MODE_BARCODE 2876 */ 2877 public String getSceneMode() { 2878 return get(KEY_SCENE_MODE); 2879 } 2880 2881 /** 2882 * Sets the scene mode. Changing scene mode may override other 2883 * parameters (such as flash mode, focus mode, white balance). For 2884 * example, suppose originally flash mode is on and supported flash 2885 * modes are on/off. In night scene mode, both flash mode and supported 2886 * flash mode may be changed to off. After setting scene mode, 2887 * applications should call getParameters to know if some parameters are 2888 * changed. 2889 * 2890 * @param value scene mode. 2891 * @see #getSceneMode() 2892 */ 2893 public void setSceneMode(String value) { 2894 set(KEY_SCENE_MODE, value); 2895 } 2896 2897 /** 2898 * Gets the supported scene modes. 2899 * 2900 * @return a list of supported scene modes. null if scene mode setting 2901 * is not supported. 2902 * @see #getSceneMode() 2903 */ 2904 public List<String> getSupportedSceneModes() { 2905 String str = get(KEY_SCENE_MODE + SUPPORTED_VALUES_SUFFIX); 2906 return split(str); 2907 } 2908 2909 /** 2910 * Gets the current flash mode setting. 2911 * 2912 * @return current flash mode. null if flash mode setting is not 2913 * supported. 2914 * @see #FLASH_MODE_OFF 2915 * @see #FLASH_MODE_AUTO 2916 * @see #FLASH_MODE_ON 2917 * @see #FLASH_MODE_RED_EYE 2918 * @see #FLASH_MODE_TORCH 2919 */ 2920 public String getFlashMode() { 2921 return get(KEY_FLASH_MODE); 2922 } 2923 2924 /** 2925 * Sets the flash mode. 2926 * 2927 * @param value flash mode. 2928 * @see #getFlashMode() 2929 */ 2930 public void setFlashMode(String value) { 2931 set(KEY_FLASH_MODE, value); 2932 } 2933 2934 /** 2935 * Gets the supported flash modes. 2936 * 2937 * @return a list of supported flash modes. null if flash mode setting 2938 * is not supported. 2939 * @see #getFlashMode() 2940 */ 2941 public List<String> getSupportedFlashModes() { 2942 String str = get(KEY_FLASH_MODE + SUPPORTED_VALUES_SUFFIX); 2943 return split(str); 2944 } 2945 2946 /** 2947 * Gets the current focus mode setting. 2948 * 2949 * @return current focus mode. This method will always return a non-null 2950 * value. Applications should call {@link 2951 * #autoFocus(AutoFocusCallback)} to start the focus if focus 2952 * mode is FOCUS_MODE_AUTO or FOCUS_MODE_MACRO. 2953 * @see #FOCUS_MODE_AUTO 2954 * @see #FOCUS_MODE_INFINITY 2955 * @see #FOCUS_MODE_MACRO 2956 * @see #FOCUS_MODE_FIXED 2957 * @see #FOCUS_MODE_EDOF 2958 * @see #FOCUS_MODE_CONTINUOUS_VIDEO 2959 */ 2960 public String getFocusMode() { 2961 return get(KEY_FOCUS_MODE); 2962 } 2963 2964 /** 2965 * Sets the focus mode. 2966 * 2967 * @param value focus mode. 2968 * @see #getFocusMode() 2969 */ 2970 public void setFocusMode(String value) { 2971 set(KEY_FOCUS_MODE, value); 2972 } 2973 2974 /** 2975 * Gets the supported focus modes. 2976 * 2977 * @return a list of supported focus modes. This method will always 2978 * return a list with at least one element. 2979 * @see #getFocusMode() 2980 */ 2981 public List<String> getSupportedFocusModes() { 2982 String str = get(KEY_FOCUS_MODE + SUPPORTED_VALUES_SUFFIX); 2983 return split(str); 2984 } 2985 2986 /** 2987 * Gets the focal length (in millimeter) of the camera. 2988 * 2989 * @return the focal length. This method will always return a valid 2990 * value. 2991 */ 2992 public float getFocalLength() { 2993 return Float.parseFloat(get(KEY_FOCAL_LENGTH)); 2994 } 2995 2996 /** 2997 * Gets the horizontal angle of view in degrees. 2998 * 2999 * @return horizontal angle of view. This method will always return a 3000 * valid value. 3001 */ 3002 public float getHorizontalViewAngle() { 3003 return Float.parseFloat(get(KEY_HORIZONTAL_VIEW_ANGLE)); 3004 } 3005 3006 /** 3007 * Gets the vertical angle of view in degrees. 3008 * 3009 * @return vertical angle of view. This method will always return a 3010 * valid value. 3011 */ 3012 public float getVerticalViewAngle() { 3013 return Float.parseFloat(get(KEY_VERTICAL_VIEW_ANGLE)); 3014 } 3015 3016 /** 3017 * Gets the current exposure compensation index. 3018 * 3019 * @return current exposure compensation index. The range is {@link 3020 * #getMinExposureCompensation} to {@link 3021 * #getMaxExposureCompensation}. 0 means exposure is not 3022 * adjusted. 3023 */ 3024 public int getExposureCompensation() { 3025 return getInt(KEY_EXPOSURE_COMPENSATION, 0); 3026 } 3027 3028 /** 3029 * Sets the exposure compensation index. 3030 * 3031 * @param value exposure compensation index. The valid value range is 3032 * from {@link #getMinExposureCompensation} (inclusive) to {@link 3033 * #getMaxExposureCompensation} (inclusive). 0 means exposure is 3034 * not adjusted. Application should call 3035 * getMinExposureCompensation and getMaxExposureCompensation to 3036 * know if exposure compensation is supported. 3037 */ 3038 public void setExposureCompensation(int value) { 3039 set(KEY_EXPOSURE_COMPENSATION, value); 3040 } 3041 3042 /** 3043 * Gets the maximum exposure compensation index. 3044 * 3045 * @return maximum exposure compensation index (>=0). If both this 3046 * method and {@link #getMinExposureCompensation} return 0, 3047 * exposure compensation is not supported. 3048 */ 3049 public int getMaxExposureCompensation() { 3050 return getInt(KEY_MAX_EXPOSURE_COMPENSATION, 0); 3051 } 3052 3053 /** 3054 * Gets the minimum exposure compensation index. 3055 * 3056 * @return minimum exposure compensation index (<=0). If both this 3057 * method and {@link #getMaxExposureCompensation} return 0, 3058 * exposure compensation is not supported. 3059 */ 3060 public int getMinExposureCompensation() { 3061 return getInt(KEY_MIN_EXPOSURE_COMPENSATION, 0); 3062 } 3063 3064 /** 3065 * Gets the exposure compensation step. 3066 * 3067 * @return exposure compensation step. Applications can get EV by 3068 * multiplying the exposure compensation index and step. Ex: if 3069 * exposure compensation index is -6 and step is 0.333333333, EV 3070 * is -2. 3071 */ 3072 public float getExposureCompensationStep() { 3073 return getFloat(KEY_EXPOSURE_COMPENSATION_STEP, 0); 3074 } 3075 3076 /** 3077 * <p>Sets the auto-exposure lock state. Applications should check 3078 * {@link #isAutoExposureLockSupported} before using this method.</p> 3079 * 3080 * <p>If set to true, the camera auto-exposure routine will immediately 3081 * pause until the lock is set to false. Exposure compensation settings 3082 * changes will still take effect while auto-exposure is locked.</p> 3083 * 3084 * <p>If auto-exposure is already locked, setting this to true again has 3085 * no effect (the driver will not recalculate exposure values).</p> 3086 * 3087 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 3088 * image capture with {@link #takePicture(Camera.ShutterCallback, 3089 * Camera.PictureCallback, Camera.PictureCallback)}, will not change the 3090 * lock.</p> 3091 * 3092 * <p>Exposure compensation, auto-exposure lock, and auto-white balance 3093 * lock can be used to capture an exposure-bracketed burst of images, 3094 * for example.</p> 3095 * 3096 * <p>Auto-exposure state, including the lock state, will not be 3097 * maintained after camera {@link #release()} is called. Locking 3098 * auto-exposure after {@link #open()} but before the first call to 3099 * {@link #startPreview()} will not allow the auto-exposure routine to 3100 * run at all, and may result in severely over- or under-exposed 3101 * images.</p> 3102 * 3103 * @param toggle new state of the auto-exposure lock. True means that 3104 * auto-exposure is locked, false means that the auto-exposure 3105 * routine is free to run normally. 3106 * 3107 * @see #getAutoExposureLock() 3108 */ 3109 public void setAutoExposureLock(boolean toggle) { 3110 set(KEY_AUTO_EXPOSURE_LOCK, toggle ? TRUE : FALSE); 3111 } 3112 3113 /** 3114 * Gets the state of the auto-exposure lock. Applications should check 3115 * {@link #isAutoExposureLockSupported} before using this method. See 3116 * {@link #setAutoExposureLock} for details about the lock. 3117 * 3118 * @return State of the auto-exposure lock. Returns true if 3119 * auto-exposure is currently locked, and false otherwise. 3120 * 3121 * @see #setAutoExposureLock(boolean) 3122 * 3123 */ 3124 public boolean getAutoExposureLock() { 3125 String str = get(KEY_AUTO_EXPOSURE_LOCK); 3126 return TRUE.equals(str); 3127 } 3128 3129 /** 3130 * Returns true if auto-exposure locking is supported. Applications 3131 * should call this before trying to lock auto-exposure. See 3132 * {@link #setAutoExposureLock} for details about the lock. 3133 * 3134 * @return true if auto-exposure lock is supported. 3135 * @see #setAutoExposureLock(boolean) 3136 * 3137 */ 3138 public boolean isAutoExposureLockSupported() { 3139 String str = get(KEY_AUTO_EXPOSURE_LOCK_SUPPORTED); 3140 return TRUE.equals(str); 3141 } 3142 3143 /** 3144 * <p>Sets the auto-white balance lock state. Applications should check 3145 * {@link #isAutoWhiteBalanceLockSupported} before using this 3146 * method.</p> 3147 * 3148 * <p>If set to true, the camera auto-white balance routine will 3149 * immediately pause until the lock is set to false.</p> 3150 * 3151 * <p>If auto-white balance is already locked, setting this to true 3152 * again has no effect (the driver will not recalculate white balance 3153 * values).</p> 3154 * 3155 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 3156 * image capture with {@link #takePicture(Camera.ShutterCallback, 3157 * Camera.PictureCallback, Camera.PictureCallback)}, will not change the 3158 * the lock.</p> 3159 * 3160 * <p> Changing the white balance mode with {@link #setWhiteBalance} 3161 * will release the auto-white balance lock if it is set.</p> 3162 * 3163 * <p>Exposure compensation, AE lock, and AWB lock can be used to 3164 * capture an exposure-bracketed burst of images, for example. 3165 * Auto-white balance state, including the lock state, will not be 3166 * maintained after camera {@link #release()} is called. Locking 3167 * auto-white balance after {@link #open()} but before the first call to 3168 * {@link #startPreview()} will not allow the auto-white balance routine 3169 * to run at all, and may result in severely incorrect color in captured 3170 * images.</p> 3171 * 3172 * @param toggle new state of the auto-white balance lock. True means 3173 * that auto-white balance is locked, false means that the 3174 * auto-white balance routine is free to run normally. 3175 * 3176 * @see #getAutoWhiteBalanceLock() 3177 * @see #setWhiteBalance(String) 3178 */ 3179 public void setAutoWhiteBalanceLock(boolean toggle) { 3180 set(KEY_AUTO_WHITEBALANCE_LOCK, toggle ? TRUE : FALSE); 3181 } 3182 3183 /** 3184 * Gets the state of the auto-white balance lock. Applications should 3185 * check {@link #isAutoWhiteBalanceLockSupported} before using this 3186 * method. See {@link #setAutoWhiteBalanceLock} for details about the 3187 * lock. 3188 * 3189 * @return State of the auto-white balance lock. Returns true if 3190 * auto-white balance is currently locked, and false 3191 * otherwise. 3192 * 3193 * @see #setAutoWhiteBalanceLock(boolean) 3194 * 3195 */ 3196 public boolean getAutoWhiteBalanceLock() { 3197 String str = get(KEY_AUTO_WHITEBALANCE_LOCK); 3198 return TRUE.equals(str); 3199 } 3200 3201 /** 3202 * Returns true if auto-white balance locking is supported. Applications 3203 * should call this before trying to lock auto-white balance. See 3204 * {@link #setAutoWhiteBalanceLock} for details about the lock. 3205 * 3206 * @return true if auto-white balance lock is supported. 3207 * @see #setAutoWhiteBalanceLock(boolean) 3208 * 3209 */ 3210 public boolean isAutoWhiteBalanceLockSupported() { 3211 String str = get(KEY_AUTO_WHITEBALANCE_LOCK_SUPPORTED); 3212 return TRUE.equals(str); 3213 } 3214 3215 /** 3216 * Gets current zoom value. This also works when smooth zoom is in 3217 * progress. Applications should check {@link #isZoomSupported} before 3218 * using this method. 3219 * 3220 * @return the current zoom value. The range is 0 to {@link 3221 * #getMaxZoom}. 0 means the camera is not zoomed. 3222 */ 3223 public int getZoom() { 3224 return getInt(KEY_ZOOM, 0); 3225 } 3226 3227 /** 3228 * Sets current zoom value. If the camera is zoomed (value > 0), the 3229 * actual picture size may be smaller than picture size setting. 3230 * Applications can check the actual picture size after picture is 3231 * returned from {@link PictureCallback}. The preview size remains the 3232 * same in zoom. Applications should check {@link #isZoomSupported} 3233 * before using this method. 3234 * 3235 * @param value zoom value. The valid range is 0 to {@link #getMaxZoom}. 3236 */ 3237 public void setZoom(int value) { 3238 set(KEY_ZOOM, value); 3239 } 3240 3241 /** 3242 * Returns true if zoom is supported. Applications should call this 3243 * before using other zoom methods. 3244 * 3245 * @return true if zoom is supported. 3246 */ 3247 public boolean isZoomSupported() { 3248 String str = get(KEY_ZOOM_SUPPORTED); 3249 return TRUE.equals(str); 3250 } 3251 3252 /** 3253 * Gets the maximum zoom value allowed for snapshot. This is the maximum 3254 * value that applications can set to {@link #setZoom(int)}. 3255 * Applications should call {@link #isZoomSupported} before using this 3256 * method. This value may change in different preview size. Applications 3257 * should call this again after setting preview size. 3258 * 3259 * @return the maximum zoom value supported by the camera. 3260 */ 3261 public int getMaxZoom() { 3262 return getInt(KEY_MAX_ZOOM, 0); 3263 } 3264 3265 /** 3266 * Gets the zoom ratios of all zoom values. Applications should check 3267 * {@link #isZoomSupported} before using this method. 3268 * 3269 * @return the zoom ratios in 1/100 increments. Ex: a zoom of 3.2x is 3270 * returned as 320. The number of elements is {@link 3271 * #getMaxZoom} + 1. The list is sorted from small to large. The 3272 * first element is always 100. The last element is the zoom 3273 * ratio of the maximum zoom value. 3274 */ 3275 public List<Integer> getZoomRatios() { 3276 return splitInt(get(KEY_ZOOM_RATIOS)); 3277 } 3278 3279 /** 3280 * Returns true if smooth zoom is supported. Applications should call 3281 * this before using other smooth zoom methods. 3282 * 3283 * @return true if smooth zoom is supported. 3284 */ 3285 public boolean isSmoothZoomSupported() { 3286 String str = get(KEY_SMOOTH_ZOOM_SUPPORTED); 3287 return TRUE.equals(str); 3288 } 3289 3290 /** 3291 * <p>Gets the distances from the camera to where an object appears to be 3292 * in focus. The object is sharpest at the optimal focus distance. The 3293 * depth of field is the far focus distance minus near focus distance.</p> 3294 * 3295 * <p>Focus distances may change after calling {@link 3296 * #autoFocus(AutoFocusCallback)}, {@link #cancelAutoFocus}, or {@link 3297 * #startPreview()}. Applications can call {@link #getParameters()} 3298 * and this method anytime to get the latest focus distances. If the 3299 * focus mode is FOCUS_MODE_CONTINUOUS_VIDEO, focus distances may change 3300 * from time to time.</p> 3301 * 3302 * <p>This method is intended to estimate the distance between the camera 3303 * and the subject. After autofocus, the subject distance may be within 3304 * near and far focus distance. However, the precision depends on the 3305 * camera hardware, autofocus algorithm, the focus area, and the scene. 3306 * The error can be large and it should be only used as a reference.</p> 3307 * 3308 * <p>Far focus distance >= optimal focus distance >= near focus distance. 3309 * If the focus distance is infinity, the value will be 3310 * {@code Float.POSITIVE_INFINITY}.</p> 3311 * 3312 * @param output focus distances in meters. output must be a float 3313 * array with three elements. Near focus distance, optimal focus 3314 * distance, and far focus distance will be filled in the array. 3315 * @see #FOCUS_DISTANCE_NEAR_INDEX 3316 * @see #FOCUS_DISTANCE_OPTIMAL_INDEX 3317 * @see #FOCUS_DISTANCE_FAR_INDEX 3318 */ 3319 public void getFocusDistances(float[] output) { 3320 if (output == null || output.length != 3) { 3321 throw new IllegalArgumentException( 3322 "output must be a float array with three elements."); 3323 } 3324 splitFloat(get(KEY_FOCUS_DISTANCES), output); 3325 } 3326 3327 /** 3328 * Gets the maximum number of focus areas supported. This is the maximum 3329 * length of the list in {@link #setFocusAreas(List)} and 3330 * {@link #getFocusAreas()}. 3331 * 3332 * @return the maximum number of focus areas supported by the camera. 3333 * @see #getFocusAreas() 3334 */ 3335 public int getMaxNumFocusAreas() { 3336 return getInt(KEY_MAX_NUM_FOCUS_AREAS, 0); 3337 } 3338 3339 /** 3340 * <p>Gets the current focus areas. Camera driver uses the areas to decide 3341 * focus.</p> 3342 * 3343 * <p>Before using this API or {@link #setFocusAreas(List)}, apps should 3344 * call {@link #getMaxNumFocusAreas()} to know the maximum number of 3345 * focus areas first. If the value is 0, focus area is not supported.</p> 3346 * 3347 * <p>Each focus area is a rectangle with specified weight. The direction 3348 * is relative to the sensor orientation, that is, what the sensor sees. 3349 * The direction is not affected by the rotation or mirroring of 3350 * {@link #setDisplayOrientation(int)}. Coordinates of the rectangle 3351 * range from -1000 to 1000. (-1000, -1000) is the upper left point. 3352 * (1000, 1000) is the lower right point. The width and height of focus 3353 * areas cannot be 0 or negative.</p> 3354 * 3355 * <p>The weight must range from 1 to 1000. The weight should be 3356 * interpreted as a per-pixel weight - all pixels in the area have the 3357 * specified weight. This means a small area with the same weight as a 3358 * larger area will have less influence on the focusing than the larger 3359 * area. Focus areas can partially overlap and the driver will add the 3360 * weights in the overlap region.</p> 3361 * 3362 * <p>A special case of a {@code null} focus area list means the driver is 3363 * free to select focus targets as it wants. For example, the driver may 3364 * use more signals to select focus areas and change them 3365 * dynamically. Apps can set the focus area list to {@code null} if they 3366 * want the driver to completely control focusing.</p> 3367 * 3368 * <p>Focus areas are relative to the current field of view 3369 * ({@link #getZoom()}). No matter what the zoom level is, (-1000,-1000) 3370 * represents the top of the currently visible camera frame. The focus 3371 * area cannot be set to be outside the current field of view, even 3372 * when using zoom.</p> 3373 * 3374 * <p>Focus area only has effect if the current focus mode is 3375 * {@link #FOCUS_MODE_AUTO}, {@link #FOCUS_MODE_MACRO}, 3376 * {@link #FOCUS_MODE_CONTINUOUS_VIDEO}, or 3377 * {@link #FOCUS_MODE_CONTINUOUS_PICTURE}.</p> 3378 * 3379 * @return a list of current focus areas 3380 */ 3381 public List<Area> getFocusAreas() { 3382 return splitArea(get(KEY_FOCUS_AREAS)); 3383 } 3384 3385 /** 3386 * Sets focus areas. See {@link #getFocusAreas()} for documentation. 3387 * 3388 * @param focusAreas the focus areas 3389 * @see #getFocusAreas() 3390 */ 3391 public void setFocusAreas(List<Area> focusAreas) { 3392 set(KEY_FOCUS_AREAS, focusAreas); 3393 } 3394 3395 /** 3396 * Gets the maximum number of metering areas supported. This is the 3397 * maximum length of the list in {@link #setMeteringAreas(List)} and 3398 * {@link #getMeteringAreas()}. 3399 * 3400 * @return the maximum number of metering areas supported by the camera. 3401 * @see #getMeteringAreas() 3402 */ 3403 public int getMaxNumMeteringAreas() { 3404 return getInt(KEY_MAX_NUM_METERING_AREAS, 0); 3405 } 3406 3407 /** 3408 * <p>Gets the current metering areas. Camera driver uses these areas to 3409 * decide exposure.</p> 3410 * 3411 * <p>Before using this API or {@link #setMeteringAreas(List)}, apps should 3412 * call {@link #getMaxNumMeteringAreas()} to know the maximum number of 3413 * metering areas first. If the value is 0, metering area is not 3414 * supported.</p> 3415 * 3416 * <p>Each metering area is a rectangle with specified weight. The 3417 * direction is relative to the sensor orientation, that is, what the 3418 * sensor sees. The direction is not affected by the rotation or 3419 * mirroring of {@link #setDisplayOrientation(int)}. Coordinates of the 3420 * rectangle range from -1000 to 1000. (-1000, -1000) is the upper left 3421 * point. (1000, 1000) is the lower right point. The width and height of 3422 * metering areas cannot be 0 or negative.</p> 3423 * 3424 * <p>The weight must range from 1 to 1000, and represents a weight for 3425 * every pixel in the area. This means that a large metering area with 3426 * the same weight as a smaller area will have more effect in the 3427 * metering result. Metering areas can partially overlap and the driver 3428 * will add the weights in the overlap region.</p> 3429 * 3430 * <p>A special case of a {@code null} metering area list means the driver 3431 * is free to meter as it chooses. For example, the driver may use more 3432 * signals to select metering areas and change them dynamically. Apps 3433 * can set the metering area list to {@code null} if they want the 3434 * driver to completely control metering.</p> 3435 * 3436 * <p>Metering areas are relative to the current field of view 3437 * ({@link #getZoom()}). No matter what the zoom level is, (-1000,-1000) 3438 * represents the top of the currently visible camera frame. The 3439 * metering area cannot be set to be outside the current field of view, 3440 * even when using zoom.</p> 3441 * 3442 * <p>No matter what metering areas are, the final exposure are compensated 3443 * by {@link #setExposureCompensation(int)}.</p> 3444 * 3445 * @return a list of current metering areas 3446 */ 3447 public List<Area> getMeteringAreas() { 3448 return splitArea(get(KEY_METERING_AREAS)); 3449 } 3450 3451 /** 3452 * Sets metering areas. See {@link #getMeteringAreas()} for 3453 * documentation. 3454 * 3455 * @param meteringAreas the metering areas 3456 * @see #getMeteringAreas() 3457 */ 3458 public void setMeteringAreas(List<Area> meteringAreas) { 3459 set(KEY_METERING_AREAS, meteringAreas); 3460 } 3461 3462 /** 3463 * Gets the maximum number of detected faces supported. This is the 3464 * maximum length of the list returned from {@link FaceDetectionListener}. 3465 * If the return value is 0, face detection of the specified type is not 3466 * supported. 3467 * 3468 * @return the maximum number of detected face supported by the camera. 3469 * @see #startFaceDetection() 3470 */ 3471 public int getMaxNumDetectedFaces() { 3472 return getInt(KEY_MAX_NUM_DETECTED_FACES_HW, 0); 3473 } 3474 3475 /** 3476 * Sets recording mode hint. This tells the camera that the intent of 3477 * the application is to record videos {@link 3478 * android.media.MediaRecorder#start()}, not to take still pictures 3479 * {@link #takePicture(Camera.ShutterCallback, Camera.PictureCallback, 3480 * Camera.PictureCallback, Camera.PictureCallback)}. Using this hint can 3481 * allow MediaRecorder.start() to start faster or with fewer glitches on 3482 * output. This should be called before starting preview for the best 3483 * result, but can be changed while the preview is active. The default 3484 * value is false. 3485 * 3486 * The app can still call takePicture() when the hint is true or call 3487 * MediaRecorder.start() when the hint is false. But the performance may 3488 * be worse. 3489 * 3490 * @param hint true if the apps intend to record videos using 3491 * {@link android.media.MediaRecorder}. 3492 */ 3493 public void setRecordingHint(boolean hint) { 3494 set(KEY_RECORDING_HINT, hint ? TRUE : FALSE); 3495 } 3496 3497 /** 3498 * <p>Returns true if video snapshot is supported. That is, applications 3499 * can call {@link #takePicture(Camera.ShutterCallback, 3500 * Camera.PictureCallback, Camera.PictureCallback, 3501 * Camera.PictureCallback)} during recording. Applications do not need 3502 * to call {@link #startPreview()} after taking a picture. The preview 3503 * will be still active. Other than that, taking a picture during 3504 * recording is identical to taking a picture normally. All settings and 3505 * methods related to takePicture work identically. Ex: 3506 * {@link #getPictureSize()}, {@link #getSupportedPictureSizes()}, 3507 * {@link #setJpegQuality(int)}, {@link #setRotation(int)}, and etc. The 3508 * picture will have an EXIF header. {@link #FLASH_MODE_AUTO} and 3509 * {@link #FLASH_MODE_ON} also still work, but the video will record the 3510 * flash.</p> 3511 * 3512 * <p>Applications can set shutter callback as null to avoid the shutter 3513 * sound. It is also recommended to set raw picture and post view 3514 * callbacks to null to avoid the interrupt of preview display.</p> 3515 * 3516 * <p>Field-of-view of the recorded video may be different from that of the 3517 * captured pictures. The maximum size of a video snapshot may be 3518 * smaller than that for regular still captures. If the current picture 3519 * size is set higher than can be supported by video snapshot, the 3520 * picture will be captured at the maximum supported size instead.</p> 3521 * 3522 * @return true if video snapshot is supported. 3523 */ 3524 public boolean isVideoSnapshotSupported() { 3525 String str = get(KEY_VIDEO_SNAPSHOT_SUPPORTED); 3526 return TRUE.equals(str); 3527 } 3528 3529 /** 3530 * <p>Enables and disables video stabilization. Use 3531 * {@link #isVideoStabilizationSupported} to determine if calling this 3532 * method is valid.</p> 3533 * 3534 * <p>Video stabilization reduces the shaking due to the motion of the 3535 * camera in both the preview stream and in recorded videos, including 3536 * data received from the preview callback. It does not reduce motion 3537 * blur in images captured with 3538 * {@link Camera#takePicture takePicture}.</p> 3539 * 3540 * <p>Video stabilization can be enabled and disabled while preview or 3541 * recording is active, but toggling it may cause a jump in the video 3542 * stream that may be undesirable in a recorded video.</p> 3543 * 3544 * @param toggle Set to true to enable video stabilization, and false to 3545 * disable video stabilization. 3546 * @see #isVideoStabilizationSupported() 3547 * @see #getVideoStabilization() 3548 */ 3549 public void setVideoStabilization(boolean toggle) { 3550 set(KEY_VIDEO_STABILIZATION, toggle ? TRUE : FALSE); 3551 } 3552 3553 /** 3554 * Get the current state of video stabilization. See 3555 * {@link #setVideoStabilization} for details of video stabilization. 3556 * 3557 * @return true if video stabilization is enabled 3558 * @see #isVideoStabilizationSupported() 3559 * @see #setVideoStabilization(boolean) 3560 */ 3561 public boolean getVideoStabilization() { 3562 String str = get(KEY_VIDEO_STABILIZATION); 3563 return TRUE.equals(str); 3564 } 3565 3566 /** 3567 * Returns true if video stabilization is supported. See 3568 * {@link #setVideoStabilization} for details of video stabilization. 3569 * 3570 * @return true if video stabilization is supported 3571 * @see #setVideoStabilization(boolean) 3572 * @see #getVideoStabilization() 3573 */ 3574 public boolean isVideoStabilizationSupported() { 3575 String str = get(KEY_VIDEO_STABILIZATION_SUPPORTED); 3576 return TRUE.equals(str); 3577 } 3578 3579 // Splits a comma delimited string to an ArrayList of String. 3580 // Return null if the passing string is null or the size is 0. 3581 private ArrayList<String> split(String str) { 3582 if (str == null) return null; 3583 3584 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 3585 splitter.setString(str); 3586 ArrayList<String> substrings = new ArrayList<String>(); 3587 for (String s : splitter) { 3588 substrings.add(s); 3589 } 3590 return substrings; 3591 } 3592 3593 // Splits a comma delimited string to an ArrayList of Integer. 3594 // Return null if the passing string is null or the size is 0. 3595 private ArrayList<Integer> splitInt(String str) { 3596 if (str == null) return null; 3597 3598 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 3599 splitter.setString(str); 3600 ArrayList<Integer> substrings = new ArrayList<Integer>(); 3601 for (String s : splitter) { 3602 substrings.add(Integer.parseInt(s)); 3603 } 3604 if (substrings.size() == 0) return null; 3605 return substrings; 3606 } 3607 3608 private void splitInt(String str, int[] output) { 3609 if (str == null) return; 3610 3611 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 3612 splitter.setString(str); 3613 int index = 0; 3614 for (String s : splitter) { 3615 output[index++] = Integer.parseInt(s); 3616 } 3617 } 3618 3619 // Splits a comma delimited string to an ArrayList of Float. 3620 private void splitFloat(String str, float[] output) { 3621 if (str == null) return; 3622 3623 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 3624 splitter.setString(str); 3625 int index = 0; 3626 for (String s : splitter) { 3627 output[index++] = Float.parseFloat(s); 3628 } 3629 } 3630 3631 // Returns the value of a float parameter. 3632 private float getFloat(String key, float defaultValue) { 3633 try { 3634 return Float.parseFloat(mMap.get(key)); 3635 } catch (NumberFormatException ex) { 3636 return defaultValue; 3637 } 3638 } 3639 3640 // Returns the value of a integer parameter. 3641 private int getInt(String key, int defaultValue) { 3642 try { 3643 return Integer.parseInt(mMap.get(key)); 3644 } catch (NumberFormatException ex) { 3645 return defaultValue; 3646 } 3647 } 3648 3649 // Splits a comma delimited string to an ArrayList of Size. 3650 // Return null if the passing string is null or the size is 0. 3651 private ArrayList<Size> splitSize(String str) { 3652 if (str == null) return null; 3653 3654 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 3655 splitter.setString(str); 3656 ArrayList<Size> sizeList = new ArrayList<Size>(); 3657 for (String s : splitter) { 3658 Size size = strToSize(s); 3659 if (size != null) sizeList.add(size); 3660 } 3661 if (sizeList.size() == 0) return null; 3662 return sizeList; 3663 } 3664 3665 // Parses a string (ex: "480x320") to Size object. 3666 // Return null if the passing string is null. 3667 private Size strToSize(String str) { 3668 if (str == null) return null; 3669 3670 int pos = str.indexOf('x'); 3671 if (pos != -1) { 3672 String width = str.substring(0, pos); 3673 String height = str.substring(pos + 1); 3674 return new Size(Integer.parseInt(width), 3675 Integer.parseInt(height)); 3676 } 3677 Log.e(TAG, "Invalid size parameter string=" + str); 3678 return null; 3679 } 3680 3681 // Splits a comma delimited string to an ArrayList of int array. 3682 // Example string: "(10000,26623),(10000,30000)". Return null if the 3683 // passing string is null or the size is 0. 3684 private ArrayList<int[]> splitRange(String str) { 3685 if (str == null || str.charAt(0) != '(' 3686 || str.charAt(str.length() - 1) != ')') { 3687 Log.e(TAG, "Invalid range list string=" + str); 3688 return null; 3689 } 3690 3691 ArrayList<int[]> rangeList = new ArrayList<int[]>(); 3692 int endIndex, fromIndex = 1; 3693 do { 3694 int[] range = new int[2]; 3695 endIndex = str.indexOf("),(", fromIndex); 3696 if (endIndex == -1) endIndex = str.length() - 1; 3697 splitInt(str.substring(fromIndex, endIndex), range); 3698 rangeList.add(range); 3699 fromIndex = endIndex + 3; 3700 } while (endIndex != str.length() - 1); 3701 3702 if (rangeList.size() == 0) return null; 3703 return rangeList; 3704 } 3705 3706 // Splits a comma delimited string to an ArrayList of Area objects. 3707 // Example string: "(-10,-10,0,0,300),(0,0,10,10,700)". Return null if 3708 // the passing string is null or the size is 0 or (0,0,0,0,0). 3709 private ArrayList<Area> splitArea(String str) { 3710 if (str == null || str.charAt(0) != '(' 3711 || str.charAt(str.length() - 1) != ')') { 3712 Log.e(TAG, "Invalid area string=" + str); 3713 return null; 3714 } 3715 3716 ArrayList<Area> result = new ArrayList<Area>(); 3717 int endIndex, fromIndex = 1; 3718 int[] array = new int[5]; 3719 do { 3720 endIndex = str.indexOf("),(", fromIndex); 3721 if (endIndex == -1) endIndex = str.length() - 1; 3722 splitInt(str.substring(fromIndex, endIndex), array); 3723 Rect rect = new Rect(array[0], array[1], array[2], array[3]); 3724 result.add(new Area(rect, array[4])); 3725 fromIndex = endIndex + 3; 3726 } while (endIndex != str.length() - 1); 3727 3728 if (result.size() == 0) return null; 3729 3730 if (result.size() == 1) { 3731 Area area = result.get(0); 3732 Rect rect = area.rect; 3733 if (rect.left == 0 && rect.top == 0 && rect.right == 0 3734 && rect.bottom == 0 && area.weight == 0) { 3735 return null; 3736 } 3737 } 3738 3739 return result; 3740 } 3741 3742 private boolean same(String s1, String s2) { 3743 if (s1 == null && s2 == null) return true; 3744 if (s1 != null && s1.equals(s2)) return true; 3745 return false; 3746 } 3747 }; 3748} 3749