Camera.java revision 487acdfb4eca3859fd688a1ff0a32fe6314b68f6
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.graphics.ImageFormat; 22import android.graphics.Point; 23import android.graphics.Rect; 24import android.graphics.SurfaceTexture; 25import android.os.Handler; 26import android.os.Looper; 27import android.os.Message; 28import android.util.Log; 29import android.text.TextUtils; 30import android.view.Surface; 31import android.view.SurfaceHolder; 32 33import java.io.IOException; 34import java.lang.ref.WeakReference; 35import java.util.ArrayList; 36import java.util.HashMap; 37import java.util.List; 38import java.util.concurrent.locks.ReentrantLock; 39 40/** 41 * The Camera class is used to set image capture settings, start/stop preview, 42 * snap pictures, and retrieve frames for encoding for video. This class is a 43 * client for the Camera service, which manages the actual camera hardware. 44 * 45 * <p>To access the device camera, you must declare the 46 * {@link android.Manifest.permission#CAMERA} permission in your Android 47 * Manifest. Also be sure to include the 48 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 49 * manifest element to declare camera features used by your application. 50 * For example, if you use the camera and auto-focus feature, your Manifest 51 * should include the following:</p> 52 * <pre> <uses-permission android:name="android.permission.CAMERA" /> 53 * <uses-feature android:name="android.hardware.camera" /> 54 * <uses-feature android:name="android.hardware.camera.autofocus" /></pre> 55 * 56 * <p>To take pictures with this class, use the following steps:</p> 57 * 58 * <ol> 59 * <li>Obtain an instance of Camera from {@link #open(int)}. 60 * 61 * <li>Get existing (default) settings with {@link #getParameters()}. 62 * 63 * <li>If necessary, modify the returned {@link Camera.Parameters} object and call 64 * {@link #setParameters(Camera.Parameters)}. 65 * 66 * <li>If desired, call {@link #setDisplayOrientation(int)}. 67 * 68 * <li><b>Important</b>: Pass a fully initialized {@link SurfaceHolder} to 69 * {@link #setPreviewDisplay(SurfaceHolder)}. Without a surface, the camera 70 * will be unable to start the preview. 71 * 72 * <li><b>Important</b>: Call {@link #startPreview()} to start updating the 73 * preview surface. Preview must be started before you can take a picture. 74 * 75 * <li>When you want, call {@link #takePicture(Camera.ShutterCallback, 76 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)} to 77 * capture a photo. Wait for the callbacks to provide the actual image data. 78 * 79 * <li>After taking a picture, preview display will have stopped. To take more 80 * photos, call {@link #startPreview()} again first. 81 * 82 * <li>Call {@link #stopPreview()} to stop updating the preview surface. 83 * 84 * <li><b>Important:</b> Call {@link #release()} to release the camera for 85 * use by other applications. Applications should release the camera 86 * immediately in {@link android.app.Activity#onPause()} (and re-{@link #open()} 87 * it in {@link android.app.Activity#onResume()}). 88 * </ol> 89 * 90 * <p>To quickly switch to video recording mode, use these steps:</p> 91 * 92 * <ol> 93 * <li>Obtain and initialize a Camera and start preview as described above. 94 * 95 * <li>Call {@link #unlock()} to allow the media process to access the camera. 96 * 97 * <li>Pass the camera to {@link android.media.MediaRecorder#setCamera(Camera)}. 98 * See {@link android.media.MediaRecorder} information about video recording. 99 * 100 * <li>When finished recording, call {@link #reconnect()} to re-acquire 101 * and re-lock the camera. 102 * 103 * <li>If desired, restart preview and take more photos or videos. 104 * 105 * <li>Call {@link #stopPreview()} and {@link #release()} as described above. 106 * </ol> 107 * 108 * <p>This class is not thread-safe, and is meant for use from one event thread. 109 * Most long-running operations (preview, focus, photo capture, etc) happen 110 * asynchronously and invoke callbacks as necessary. Callbacks will be invoked 111 * on the event thread {@link #open(int)} was called from. This class's methods 112 * must never be called from multiple threads at once.</p> 113 * 114 * <p class="caution"><strong>Caution:</strong> Different Android-powered devices 115 * may have different hardware specifications, such as megapixel ratings and 116 * auto-focus capabilities. In order for your application to be compatible with 117 * more devices, you should not make assumptions about the device camera 118 * specifications.</p> 119 * 120 * <div class="special reference"> 121 * <h3>Developer Guides</h3> 122 * <p>For more information about using cameras, read the 123 * <a href="{@docRoot}guide/topics/media/camera.html">Camera</a> developer guide.</p> 124 * </div> 125 */ 126public class Camera { 127 private static final String TAG = "Camera"; 128 129 // These match the enums in frameworks/base/include/camera/Camera.h 130 private static final int CAMERA_MSG_ERROR = 0x001; 131 private static final int CAMERA_MSG_SHUTTER = 0x002; 132 private static final int CAMERA_MSG_FOCUS = 0x004; 133 private static final int CAMERA_MSG_ZOOM = 0x008; 134 private static final int CAMERA_MSG_PREVIEW_FRAME = 0x010; 135 private static final int CAMERA_MSG_VIDEO_FRAME = 0x020; 136 private static final int CAMERA_MSG_POSTVIEW_FRAME = 0x040; 137 private static final int CAMERA_MSG_RAW_IMAGE = 0x080; 138 private static final int CAMERA_MSG_COMPRESSED_IMAGE = 0x100; 139 private static final int CAMERA_MSG_RAW_IMAGE_NOTIFY = 0x200; 140 private static final int CAMERA_MSG_PREVIEW_METADATA = 0x400; 141 private static final int CAMERA_MSG_FOCUS_MOVE = 0x800; 142 143 private int mNativeContext; // accessed by native methods 144 private EventHandler mEventHandler; 145 private ShutterCallback mShutterCallback; 146 private PictureCallback mRawImageCallback; 147 private PictureCallback mJpegCallback; 148 private PreviewCallback mPreviewCallback; 149 private PictureCallback mPostviewCallback; 150 private AutoFocusCallback mAutoFocusCallback; 151 private AutoFocusMoveCallback mAutoFocusMoveCallback; 152 private OnZoomChangeListener mZoomListener; 153 private FaceDetectionListener mFaceListener; 154 private ErrorCallback mErrorCallback; 155 private boolean mOneShot; 156 private boolean mWithBuffer; 157 private boolean mFaceDetectionRunning = false; 158 private Object mAutoFocusCallbackLock = new Object(); 159 160 /** 161 * Broadcast Action: A new picture is taken by the camera, and the entry of 162 * the picture has been added to the media store. 163 * {@link android.content.Intent#getData} is URI of the picture. 164 */ 165 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 166 public static final String ACTION_NEW_PICTURE = "android.hardware.action.NEW_PICTURE"; 167 168 /** 169 * Broadcast Action: A new video is recorded by the camera, and the entry 170 * of the video has been added to the media store. 171 * {@link android.content.Intent#getData} is URI of the video. 172 */ 173 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 174 public static final String ACTION_NEW_VIDEO = "android.hardware.action.NEW_VIDEO"; 175 176 /** 177 * Hardware face detection. It does not use much CPU. 178 */ 179 private static final int CAMERA_FACE_DETECTION_HW = 0; 180 181 /** 182 * Software face detection. It uses some CPU. 183 */ 184 private static final int CAMERA_FACE_DETECTION_SW = 1; 185 186 /** 187 * Returns the number of physical cameras available on this device. 188 */ 189 public native static int getNumberOfCameras(); 190 191 /** 192 * Returns the information about a particular camera. 193 * If {@link #getNumberOfCameras()} returns N, the valid id is 0 to N-1. 194 */ 195 public native static void getCameraInfo(int cameraId, CameraInfo cameraInfo); 196 197 /** 198 * Information about a camera 199 */ 200 public static class CameraInfo { 201 /** 202 * The facing of the camera is opposite to that of the screen. 203 */ 204 public static final int CAMERA_FACING_BACK = 0; 205 206 /** 207 * The facing of the camera is the same as that of the screen. 208 */ 209 public static final int CAMERA_FACING_FRONT = 1; 210 211 /** 212 * The direction that the camera faces. It should be 213 * CAMERA_FACING_BACK or CAMERA_FACING_FRONT. 214 */ 215 public int facing; 216 217 /** 218 * <p>The orientation of the camera image. The value is the angle that the 219 * camera image needs to be rotated clockwise so it shows correctly on 220 * the display in its natural orientation. It should be 0, 90, 180, or 270.</p> 221 * 222 * <p>For example, suppose a device has a naturally tall screen. The 223 * back-facing camera sensor is mounted in landscape. You are looking at 224 * the screen. If the top side of the camera sensor is aligned with the 225 * right edge of the screen in natural orientation, the value should be 226 * 90. If the top side of a front-facing camera sensor is aligned with 227 * the right of the screen, the value should be 270.</p> 228 * 229 * @see #setDisplayOrientation(int) 230 * @see Parameters#setRotation(int) 231 * @see Parameters#setPreviewSize(int, int) 232 * @see Parameters#setPictureSize(int, int) 233 * @see Parameters#setJpegThumbnailSize(int, int) 234 */ 235 public int orientation; 236 237 /** 238 * <p>Whether the shutter sound can be disabled.</p> 239 * 240 * <p>On some devices, the camera shutter sound cannot be turned off 241 * through {@link #enableShutterSound enableShutterSound}. This field 242 * can be used to determine whether a call to disable the shutter sound 243 * will succeed.</p> 244 * 245 * <p>If this field is set to true, then a call of 246 * {@code enableShutterSound(false)} will be successful. If set to 247 * false, then that call will fail, and the shutter sound will be played 248 * when {@link Camera#takePicture takePicture} is called.</p> 249 */ 250 public boolean canDisableShutterSound; 251 }; 252 253 /** 254 * Creates a new Camera object to access a particular hardware camera. If 255 * the same camera is opened by other applications, this will throw a 256 * RuntimeException. 257 * 258 * <p>You must call {@link #release()} when you are done using the camera, 259 * otherwise it will remain locked and be unavailable to other applications. 260 * 261 * <p>Your application should only have one Camera object active at a time 262 * for a particular hardware camera. 263 * 264 * <p>Callbacks from other methods are delivered to the event loop of the 265 * thread which called open(). If this thread has no event loop, then 266 * callbacks are delivered to the main application event loop. If there 267 * is no main application event loop, callbacks are not delivered. 268 * 269 * <p class="caution"><b>Caution:</b> On some devices, this method may 270 * take a long time to complete. It is best to call this method from a 271 * worker thread (possibly using {@link android.os.AsyncTask}) to avoid 272 * blocking the main application UI thread. 273 * 274 * @param cameraId the hardware camera to access, between 0 and 275 * {@link #getNumberOfCameras()}-1. 276 * @return a new Camera object, connected, locked and ready for use. 277 * @throws RuntimeException if opening the camera fails (for example, if the 278 * camera is in use by another process or device policy manager has 279 * disabled the camera). 280 * @see android.app.admin.DevicePolicyManager#getCameraDisabled(android.content.ComponentName) 281 */ 282 public static Camera open(int cameraId) { 283 return new Camera(cameraId); 284 } 285 286 /** 287 * Creates a new Camera object to access the first back-facing camera on the 288 * device. If the device does not have a back-facing camera, this returns 289 * null. 290 * @see #open(int) 291 */ 292 public static Camera open() { 293 int numberOfCameras = getNumberOfCameras(); 294 CameraInfo cameraInfo = new CameraInfo(); 295 for (int i = 0; i < numberOfCameras; i++) { 296 getCameraInfo(i, cameraInfo); 297 if (cameraInfo.facing == CameraInfo.CAMERA_FACING_BACK) { 298 return new Camera(i); 299 } 300 } 301 return null; 302 } 303 304 Camera(int cameraId) { 305 mShutterCallback = null; 306 mRawImageCallback = null; 307 mJpegCallback = null; 308 mPreviewCallback = null; 309 mPostviewCallback = null; 310 mZoomListener = null; 311 312 Looper looper; 313 if ((looper = Looper.myLooper()) != null) { 314 mEventHandler = new EventHandler(this, looper); 315 } else if ((looper = Looper.getMainLooper()) != null) { 316 mEventHandler = new EventHandler(this, looper); 317 } else { 318 mEventHandler = null; 319 } 320 321 native_setup(new WeakReference<Camera>(this), cameraId); 322 } 323 324 /** 325 * An empty Camera for testing purpose. 326 */ 327 Camera() { 328 } 329 330 protected void finalize() { 331 release(); 332 } 333 334 private native final void native_setup(Object camera_this, int cameraId); 335 private native final void native_release(); 336 337 338 /** 339 * Disconnects and releases the Camera object resources. 340 * 341 * <p>You must call this as soon as you're done with the Camera object.</p> 342 */ 343 public final void release() { 344 native_release(); 345 mFaceDetectionRunning = false; 346 } 347 348 /** 349 * Unlocks the camera to allow another process to access it. 350 * Normally, the camera is locked to the process with an active Camera 351 * object until {@link #release()} is called. To allow rapid handoff 352 * between processes, you can call this method to release the camera 353 * temporarily for another process to use; once the other process is done 354 * you can call {@link #reconnect()} to reclaim the camera. 355 * 356 * <p>This must be done before calling 357 * {@link android.media.MediaRecorder#setCamera(Camera)}. This cannot be 358 * called after recording starts. 359 * 360 * <p>If you are not recording video, you probably do not need this method. 361 * 362 * @throws RuntimeException if the camera cannot be unlocked. 363 */ 364 public native final void unlock(); 365 366 /** 367 * Re-locks the camera to prevent other processes from accessing it. 368 * Camera objects are locked by default unless {@link #unlock()} is 369 * called. Normally {@link #reconnect()} is used instead. 370 * 371 * <p>Since API level 14, camera is automatically locked for applications in 372 * {@link android.media.MediaRecorder#start()}. Applications can use the 373 * camera (ex: zoom) after recording starts. There is no need to call this 374 * after recording starts or stops. 375 * 376 * <p>If you are not recording video, you probably do not need this method. 377 * 378 * @throws RuntimeException if the camera cannot be re-locked (for 379 * example, if the camera is still in use by another process). 380 */ 381 public native final void lock(); 382 383 /** 384 * Reconnects to the camera service after another process used it. 385 * After {@link #unlock()} is called, another process may use the 386 * camera; when the process is done, you must reconnect to the camera, 387 * which will re-acquire the lock and allow you to continue using the 388 * camera. 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 IOException if a connection cannot be re-established (for 398 * example, if the camera is still in use by another process). 399 */ 400 public native final void reconnect() throws IOException; 401 402 /** 403 * Sets the {@link Surface} to be used for live preview. 404 * Either a surface or surface texture is necessary for preview, and 405 * preview is necessary to take pictures. The same surface can be re-set 406 * without harm. Setting a preview surface will un-set any preview surface 407 * texture that was set via {@link #setPreviewTexture}. 408 * 409 * <p>The {@link SurfaceHolder} must already contain a surface when this 410 * method is called. If you are using {@link android.view.SurfaceView}, 411 * you will need to register a {@link SurfaceHolder.Callback} with 412 * {@link SurfaceHolder#addCallback(SurfaceHolder.Callback)} and wait for 413 * {@link SurfaceHolder.Callback#surfaceCreated(SurfaceHolder)} before 414 * calling setPreviewDisplay() or starting preview. 415 * 416 * <p>This method must be called before {@link #startPreview()}. The 417 * one exception is that if the preview surface is not set (or set to null) 418 * before startPreview() is called, then this method may be called once 419 * with a non-null parameter to set the preview surface. (This allows 420 * camera setup and surface creation to happen in parallel, saving time.) 421 * The preview surface may not otherwise change while preview is running. 422 * 423 * @param holder containing the Surface on which to place the preview, 424 * or null to remove the preview surface 425 * @throws IOException if the method fails (for example, if the surface 426 * is unavailable or unsuitable). 427 */ 428 public final void setPreviewDisplay(SurfaceHolder holder) throws IOException { 429 if (holder != null) { 430 setPreviewDisplay(holder.getSurface()); 431 } else { 432 setPreviewDisplay((Surface)null); 433 } 434 } 435 436 private native final void setPreviewDisplay(Surface surface) throws IOException; 437 438 /** 439 * Sets the {@link SurfaceTexture} to be used for live preview. 440 * Either a surface or surface texture is necessary for preview, and 441 * preview is necessary to take pictures. The same surface texture can be 442 * re-set without harm. Setting a preview surface texture will un-set any 443 * preview surface that was set via {@link #setPreviewDisplay}. 444 * 445 * <p>This method must be called before {@link #startPreview()}. The 446 * one exception is that if the preview surface texture is not set (or set 447 * to null) before startPreview() is called, then this method may be called 448 * once with a non-null parameter to set the preview surface. (This allows 449 * camera setup and surface creation to happen in parallel, saving time.) 450 * The preview surface texture may not otherwise change while preview is 451 * running. 452 * 453 * <p>The timestamps provided by {@link SurfaceTexture#getTimestamp()} for a 454 * SurfaceTexture set as the preview texture have an unspecified zero point, 455 * and cannot be directly compared between different cameras or different 456 * instances of the same camera, or across multiple runs of the same 457 * program. 458 * 459 * <p>If you are using the preview data to create video or still images, 460 * strongly consider using {@link android.media.MediaActionSound} to 461 * properly indicate image capture or recording start/stop to the user.</p> 462 * 463 * @see android.media.MediaActionSound 464 * @see android.graphics.SurfaceTexture 465 * @see android.view.TextureView 466 * @param surfaceTexture the {@link SurfaceTexture} to which the preview 467 * images are to be sent or null to remove the current preview surface 468 * texture 469 * @throws IOException if the method fails (for example, if the surface 470 * texture is unavailable or unsuitable). 471 */ 472 public native final void setPreviewTexture(SurfaceTexture surfaceTexture) throws IOException; 473 474 /** 475 * Callback interface used to deliver copies of preview frames as 476 * they are displayed. 477 * 478 * @see #setPreviewCallback(Camera.PreviewCallback) 479 * @see #setOneShotPreviewCallback(Camera.PreviewCallback) 480 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 481 * @see #startPreview() 482 */ 483 public interface PreviewCallback 484 { 485 /** 486 * Called as preview frames are displayed. This callback is invoked 487 * on the event thread {@link #open(int)} was called from. 488 * 489 * <p>If using the {@link android.graphics.ImageFormat#YV12} format, 490 * refer to the equations in {@link Camera.Parameters#setPreviewFormat} 491 * for the arrangement of the pixel data in the preview callback 492 * buffers. 493 * 494 * @param data the contents of the preview frame in the format defined 495 * by {@link android.graphics.ImageFormat}, which can be queried 496 * with {@link android.hardware.Camera.Parameters#getPreviewFormat()}. 497 * If {@link android.hardware.Camera.Parameters#setPreviewFormat(int)} 498 * is never called, the default will be the YCbCr_420_SP 499 * (NV21) format. 500 * @param camera the Camera service object. 501 */ 502 void onPreviewFrame(byte[] data, Camera camera); 503 }; 504 505 /** 506 * Starts capturing and drawing preview frames to the screen. 507 * Preview will not actually start until a surface is supplied 508 * with {@link #setPreviewDisplay(SurfaceHolder)} or 509 * {@link #setPreviewTexture(SurfaceTexture)}. 510 * 511 * <p>If {@link #setPreviewCallback(Camera.PreviewCallback)}, 512 * {@link #setOneShotPreviewCallback(Camera.PreviewCallback)}, or 513 * {@link #setPreviewCallbackWithBuffer(Camera.PreviewCallback)} were 514 * called, {@link Camera.PreviewCallback#onPreviewFrame(byte[], Camera)} 515 * will be called when preview data becomes available. 516 */ 517 public native final void startPreview(); 518 519 /** 520 * Stops capturing and drawing preview frames to the surface, and 521 * resets the camera for a future call to {@link #startPreview()}. 522 */ 523 public final void stopPreview() { 524 _stopPreview(); 525 mFaceDetectionRunning = false; 526 527 mShutterCallback = null; 528 mRawImageCallback = null; 529 mPostviewCallback = null; 530 mJpegCallback = null; 531 synchronized (mAutoFocusCallbackLock) { 532 mAutoFocusCallback = null; 533 } 534 mAutoFocusMoveCallback = null; 535 } 536 537 private native final void _stopPreview(); 538 539 /** 540 * Return current preview state. 541 * 542 * FIXME: Unhide before release 543 * @hide 544 */ 545 public native final boolean previewEnabled(); 546 547 /** 548 * <p>Installs a callback to be invoked for every preview frame in addition 549 * to displaying them on the screen. The callback will be repeatedly called 550 * for as long as preview is active. This method can be called at any time, 551 * even while preview is live. Any other preview callbacks are 552 * overridden.</p> 553 * 554 * <p>If you are using the preview data to create video or still images, 555 * strongly consider using {@link android.media.MediaActionSound} to 556 * properly indicate image capture or recording start/stop to the user.</p> 557 * 558 * @param cb a callback object that receives a copy of each preview frame, 559 * or null to stop receiving callbacks. 560 * @see android.media.MediaActionSound 561 */ 562 public final void setPreviewCallback(PreviewCallback cb) { 563 mPreviewCallback = cb; 564 mOneShot = false; 565 mWithBuffer = false; 566 // Always use one-shot mode. We fake camera preview mode by 567 // doing one-shot preview continuously. 568 setHasPreviewCallback(cb != null, false); 569 } 570 571 /** 572 * <p>Installs a callback to be invoked for the next preview frame in 573 * addition to displaying it on the screen. After one invocation, the 574 * callback is cleared. This method can be called any time, even when 575 * preview is live. Any other preview callbacks are overridden.</p> 576 * 577 * <p>If you are using the preview data to create video or still images, 578 * strongly consider using {@link android.media.MediaActionSound} to 579 * properly indicate image capture or recording start/stop to the user.</p> 580 * 581 * @param cb a callback object that receives a copy of the next preview frame, 582 * or null to stop receiving callbacks. 583 * @see android.media.MediaActionSound 584 */ 585 public final void setOneShotPreviewCallback(PreviewCallback cb) { 586 mPreviewCallback = cb; 587 mOneShot = true; 588 mWithBuffer = false; 589 setHasPreviewCallback(cb != null, false); 590 } 591 592 private native final void setHasPreviewCallback(boolean installed, boolean manualBuffer); 593 594 /** 595 * <p>Installs a callback to be invoked for every preview frame, using 596 * buffers supplied with {@link #addCallbackBuffer(byte[])}, in addition to 597 * displaying them on the screen. The callback will be repeatedly called 598 * for as long as preview is active and buffers are available. Any other 599 * preview callbacks are overridden.</p> 600 * 601 * <p>The purpose of this method is to improve preview efficiency and frame 602 * rate by allowing preview frame memory reuse. You must call 603 * {@link #addCallbackBuffer(byte[])} at some point -- before or after 604 * calling this method -- or no callbacks will received.</p> 605 * 606 * <p>The buffer queue will be cleared if this method is called with a null 607 * callback, {@link #setPreviewCallback(Camera.PreviewCallback)} is called, 608 * or {@link #setOneShotPreviewCallback(Camera.PreviewCallback)} is 609 * called.</p> 610 * 611 * <p>If you are using the preview data to create video or still images, 612 * strongly consider using {@link android.media.MediaActionSound} to 613 * properly indicate image capture or recording start/stop to the user.</p> 614 * 615 * @param cb a callback object that receives a copy of the preview frame, 616 * or null to stop receiving callbacks and clear the buffer queue. 617 * @see #addCallbackBuffer(byte[]) 618 * @see android.media.MediaActionSound 619 */ 620 public final void setPreviewCallbackWithBuffer(PreviewCallback cb) { 621 mPreviewCallback = cb; 622 mOneShot = false; 623 mWithBuffer = true; 624 setHasPreviewCallback(cb != null, true); 625 } 626 627 /** 628 * Adds a pre-allocated buffer to the preview callback buffer queue. 629 * Applications can add one or more buffers to the queue. When a preview 630 * frame arrives and there is still at least one available buffer, the 631 * buffer will be used and removed from the queue. Then preview callback is 632 * invoked with the buffer. If a frame arrives and there is no buffer left, 633 * the frame is discarded. Applications should add buffers back when they 634 * finish processing the data in them. 635 * 636 * <p>For formats besides YV12, the size of the buffer is determined by 637 * multiplying the preview image width, height, and bytes per pixel. The 638 * width and height can be read from 639 * {@link Camera.Parameters#getPreviewSize()}. Bytes per pixel can be 640 * computed from {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 641 * 8, using the image format from 642 * {@link Camera.Parameters#getPreviewFormat()}. 643 * 644 * <p>If using the {@link android.graphics.ImageFormat#YV12} format, the 645 * size can be calculated using the equations listed in 646 * {@link Camera.Parameters#setPreviewFormat}. 647 * 648 * <p>This method is only necessary when 649 * {@link #setPreviewCallbackWithBuffer(PreviewCallback)} is used. When 650 * {@link #setPreviewCallback(PreviewCallback)} or 651 * {@link #setOneShotPreviewCallback(PreviewCallback)} are used, buffers 652 * are automatically allocated. When a supplied buffer is too small to 653 * hold the preview frame data, preview callback will return null and 654 * the buffer will be removed from the buffer queue. 655 * 656 * @param callbackBuffer the buffer to add to the queue. The size of the 657 * buffer must match the values described above. 658 * @see #setPreviewCallbackWithBuffer(PreviewCallback) 659 */ 660 public final void addCallbackBuffer(byte[] callbackBuffer) 661 { 662 _addCallbackBuffer(callbackBuffer, CAMERA_MSG_PREVIEW_FRAME); 663 } 664 665 /** 666 * Adds a pre-allocated buffer to the raw image callback buffer queue. 667 * Applications can add one or more buffers to the queue. When a raw image 668 * frame arrives and there is still at least one available buffer, the 669 * buffer will be used to hold the raw image data and removed from the 670 * queue. Then raw image callback is invoked with the buffer. If a raw 671 * image frame arrives but there is no buffer left, the frame is 672 * discarded. Applications should add buffers back when they finish 673 * processing the data in them by calling this method again in order 674 * to avoid running out of raw image callback buffers. 675 * 676 * <p>The size of the buffer is determined by multiplying the raw image 677 * width, height, and bytes per pixel. The width and height can be 678 * read from {@link Camera.Parameters#getPictureSize()}. Bytes per pixel 679 * can be computed from 680 * {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 8, 681 * using the image format from {@link Camera.Parameters#getPreviewFormat()}. 682 * 683 * <p>This method is only necessary when the PictureCallbck for raw image 684 * is used while calling {@link #takePicture(Camera.ShutterCallback, 685 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}. 686 * 687 * <p>Please note that by calling this method, the mode for 688 * application-managed callback buffers is triggered. If this method has 689 * never been called, null will be returned by the raw image callback since 690 * there is no image callback buffer available. Furthermore, When a supplied 691 * buffer is too small to hold the raw image data, raw image callback will 692 * return null and the buffer will be removed from the buffer queue. 693 * 694 * @param callbackBuffer the buffer to add to the raw image callback buffer 695 * queue. The size should be width * height * (bits per pixel) / 8. An 696 * null callbackBuffer will be ignored and won't be added to the queue. 697 * 698 * @see #takePicture(Camera.ShutterCallback, 699 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}. 700 * 701 * {@hide} 702 */ 703 public final void addRawImageCallbackBuffer(byte[] callbackBuffer) 704 { 705 addCallbackBuffer(callbackBuffer, CAMERA_MSG_RAW_IMAGE); 706 } 707 708 private final void addCallbackBuffer(byte[] callbackBuffer, int msgType) 709 { 710 // CAMERA_MSG_VIDEO_FRAME may be allowed in the future. 711 if (msgType != CAMERA_MSG_PREVIEW_FRAME && 712 msgType != CAMERA_MSG_RAW_IMAGE) { 713 throw new IllegalArgumentException( 714 "Unsupported message type: " + msgType); 715 } 716 717 _addCallbackBuffer(callbackBuffer, msgType); 718 } 719 720 private native final void _addCallbackBuffer( 721 byte[] callbackBuffer, int msgType); 722 723 private class EventHandler extends Handler 724 { 725 private Camera mCamera; 726 727 public EventHandler(Camera c, Looper looper) { 728 super(looper); 729 mCamera = c; 730 } 731 732 @Override 733 public void handleMessage(Message msg) { 734 switch(msg.what) { 735 case CAMERA_MSG_SHUTTER: 736 if (mShutterCallback != null) { 737 mShutterCallback.onShutter(); 738 } 739 return; 740 741 case CAMERA_MSG_RAW_IMAGE: 742 if (mRawImageCallback != null) { 743 mRawImageCallback.onPictureTaken((byte[])msg.obj, mCamera); 744 } 745 return; 746 747 case CAMERA_MSG_COMPRESSED_IMAGE: 748 if (mJpegCallback != null) { 749 mJpegCallback.onPictureTaken((byte[])msg.obj, mCamera); 750 } 751 return; 752 753 case CAMERA_MSG_PREVIEW_FRAME: 754 PreviewCallback pCb = mPreviewCallback; 755 if (pCb != null) { 756 if (mOneShot) { 757 // Clear the callback variable before the callback 758 // in case the app calls setPreviewCallback from 759 // the callback function 760 mPreviewCallback = null; 761 } else if (!mWithBuffer) { 762 // We're faking the camera preview mode to prevent 763 // the app from being flooded with preview frames. 764 // Set to oneshot mode again. 765 setHasPreviewCallback(true, false); 766 } 767 pCb.onPreviewFrame((byte[])msg.obj, mCamera); 768 } 769 return; 770 771 case CAMERA_MSG_POSTVIEW_FRAME: 772 if (mPostviewCallback != null) { 773 mPostviewCallback.onPictureTaken((byte[])msg.obj, mCamera); 774 } 775 return; 776 777 case CAMERA_MSG_FOCUS: 778 AutoFocusCallback cb = null; 779 synchronized (mAutoFocusCallbackLock) { 780 cb = mAutoFocusCallback; 781 } 782 if (cb != null) { 783 boolean success = msg.arg1 == 0 ? false : true; 784 cb.onAutoFocus(success, mCamera); 785 } 786 return; 787 788 case CAMERA_MSG_ZOOM: 789 if (mZoomListener != null) { 790 mZoomListener.onZoomChange(msg.arg1, msg.arg2 != 0, mCamera); 791 } 792 return; 793 794 case CAMERA_MSG_PREVIEW_METADATA: 795 if (mFaceListener != null) { 796 mFaceListener.onFaceDetection((Face[])msg.obj, mCamera); 797 } 798 return; 799 800 case CAMERA_MSG_ERROR : 801 Log.e(TAG, "Error " + msg.arg1); 802 if (mErrorCallback != null) { 803 mErrorCallback.onError(msg.arg1, mCamera); 804 } 805 return; 806 807 case CAMERA_MSG_FOCUS_MOVE: 808 if (mAutoFocusMoveCallback != null) { 809 mAutoFocusMoveCallback.onAutoFocusMoving(msg.arg1 == 0 ? false : true, mCamera); 810 } 811 return; 812 813 default: 814 Log.e(TAG, "Unknown message type " + msg.what); 815 return; 816 } 817 } 818 } 819 820 private static void postEventFromNative(Object camera_ref, 821 int what, int arg1, int arg2, Object obj) 822 { 823 Camera c = (Camera)((WeakReference)camera_ref).get(); 824 if (c == null) 825 return; 826 827 if (c.mEventHandler != null) { 828 Message m = c.mEventHandler.obtainMessage(what, arg1, arg2, obj); 829 c.mEventHandler.sendMessage(m); 830 } 831 } 832 833 /** 834 * Callback interface used to notify on completion of camera auto focus. 835 * 836 * <p>Devices that do not support auto-focus will receive a "fake" 837 * callback to this interface. If your application needs auto-focus and 838 * should not be installed on devices <em>without</em> auto-focus, you must 839 * declare that your app uses the 840 * {@code android.hardware.camera.autofocus} feature, in the 841 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 842 * manifest element.</p> 843 * 844 * @see #autoFocus(AutoFocusCallback) 845 */ 846 public interface AutoFocusCallback 847 { 848 /** 849 * Called when the camera auto focus completes. If the camera 850 * does not support auto-focus and autoFocus is called, 851 * onAutoFocus will be called immediately with a fake value of 852 * <code>success</code> set to <code>true</code>. 853 * 854 * The auto-focus routine does not lock auto-exposure and auto-white 855 * balance after it completes. 856 * 857 * @param success true if focus was successful, false if otherwise 858 * @param camera the Camera service object 859 * @see android.hardware.Camera.Parameters#setAutoExposureLock(boolean) 860 * @see android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean) 861 */ 862 void onAutoFocus(boolean success, Camera camera); 863 } 864 865 /** 866 * Starts camera auto-focus and registers a callback function to run when 867 * the camera is focused. This method is only valid when preview is active 868 * (between {@link #startPreview()} and before {@link #stopPreview()}). 869 * 870 * <p>Callers should check 871 * {@link android.hardware.Camera.Parameters#getFocusMode()} to determine if 872 * this method should be called. If the camera does not support auto-focus, 873 * it is a no-op and {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} 874 * callback will be called immediately. 875 * 876 * <p>If your application should not be installed 877 * on devices without auto-focus, you must declare that your application 878 * uses auto-focus with the 879 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 880 * manifest element.</p> 881 * 882 * <p>If the current flash mode is not 883 * {@link android.hardware.Camera.Parameters#FLASH_MODE_OFF}, flash may be 884 * fired during auto-focus, depending on the driver and camera hardware.<p> 885 * 886 * <p>Auto-exposure lock {@link android.hardware.Camera.Parameters#getAutoExposureLock()} 887 * and auto-white balance locks {@link android.hardware.Camera.Parameters#getAutoWhiteBalanceLock()} 888 * do not change during and after autofocus. But auto-focus routine may stop 889 * auto-exposure and auto-white balance transiently during focusing. 890 * 891 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 892 * image capture with {@link #takePicture(Camera.ShutterCallback, 893 * Camera.PictureCallback, Camera.PictureCallback)}, will not change the 894 * the focus position. Applications must call cancelAutoFocus to reset the 895 * focus.</p> 896 * 897 * <p>If autofocus is successful, consider using 898 * {@link android.media.MediaActionSound} to properly play back an autofocus 899 * success sound to the user.</p> 900 * 901 * @param cb the callback to run 902 * @see #cancelAutoFocus() 903 * @see android.hardware.Camera.Parameters#setAutoExposureLock(boolean) 904 * @see android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean) 905 * @see android.media.MediaActionSound 906 */ 907 public final void autoFocus(AutoFocusCallback cb) 908 { 909 synchronized (mAutoFocusCallbackLock) { 910 mAutoFocusCallback = cb; 911 } 912 native_autoFocus(); 913 } 914 private native final void native_autoFocus(); 915 916 /** 917 * Cancels any auto-focus function in progress. 918 * Whether or not auto-focus is currently in progress, 919 * this function will return the focus position to the default. 920 * If the camera does not support auto-focus, this is a no-op. 921 * 922 * @see #autoFocus(Camera.AutoFocusCallback) 923 */ 924 public final void cancelAutoFocus() 925 { 926 synchronized (mAutoFocusCallbackLock) { 927 mAutoFocusCallback = null; 928 } 929 native_cancelAutoFocus(); 930 // CAMERA_MSG_FOCUS should be removed here because the following 931 // scenario can happen: 932 // - An application uses the same thread for autoFocus, cancelAutoFocus 933 // and looper thread. 934 // - The application calls autoFocus. 935 // - HAL sends CAMERA_MSG_FOCUS, which enters the looper message queue. 936 // Before event handler's handleMessage() is invoked, the application 937 // calls cancelAutoFocus and autoFocus. 938 // - The application gets the old CAMERA_MSG_FOCUS and thinks autofocus 939 // has been completed. But in fact it is not. 940 // 941 // As documented in the beginning of the file, apps should not use 942 // multiple threads to call autoFocus and cancelAutoFocus at the same 943 // time. It is HAL's responsibility not to send a CAMERA_MSG_FOCUS 944 // message after native_cancelAutoFocus is called. 945 mEventHandler.removeMessages(CAMERA_MSG_FOCUS); 946 } 947 private native final void native_cancelAutoFocus(); 948 949 /** 950 * Callback interface used to notify on auto focus start and stop. 951 * 952 * <p>This is only supported in continuous autofocus modes -- {@link 953 * Parameters#FOCUS_MODE_CONTINUOUS_VIDEO} and {@link 954 * Parameters#FOCUS_MODE_CONTINUOUS_PICTURE}. Applications can show 955 * autofocus animation based on this.</p> 956 */ 957 public interface AutoFocusMoveCallback 958 { 959 /** 960 * Called when the camera auto focus starts or stops. 961 * 962 * @param start true if focus starts to move, false if focus stops to move 963 * @param camera the Camera service object 964 */ 965 void onAutoFocusMoving(boolean start, Camera camera); 966 } 967 968 /** 969 * Sets camera auto-focus move callback. 970 * 971 * @param cb the callback to run 972 */ 973 public void setAutoFocusMoveCallback(AutoFocusMoveCallback cb) { 974 mAutoFocusMoveCallback = cb; 975 enableFocusMoveCallback((mAutoFocusMoveCallback != null) ? 1 : 0); 976 } 977 978 private native void enableFocusMoveCallback(int enable); 979 980 /** 981 * Callback interface used to signal the moment of actual image capture. 982 * 983 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 984 */ 985 public interface ShutterCallback 986 { 987 /** 988 * Called as near as possible to the moment when a photo is captured 989 * from the sensor. This is a good opportunity to play a shutter sound 990 * or give other feedback of camera operation. This may be some time 991 * after the photo was triggered, but some time before the actual data 992 * is available. 993 */ 994 void onShutter(); 995 } 996 997 /** 998 * Callback interface used to supply image data from a photo capture. 999 * 1000 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 1001 */ 1002 public interface PictureCallback { 1003 /** 1004 * Called when image data is available after a picture is taken. 1005 * The format of the data depends on the context of the callback 1006 * and {@link Camera.Parameters} settings. 1007 * 1008 * @param data a byte array of the picture data 1009 * @param camera the Camera service object 1010 */ 1011 void onPictureTaken(byte[] data, Camera camera); 1012 }; 1013 1014 /** 1015 * Equivalent to takePicture(shutter, raw, null, jpeg). 1016 * 1017 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 1018 */ 1019 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 1020 PictureCallback jpeg) { 1021 takePicture(shutter, raw, null, jpeg); 1022 } 1023 private native final void native_takePicture(int msgType); 1024 1025 /** 1026 * Triggers an asynchronous image capture. The camera service will initiate 1027 * a series of callbacks to the application as the image capture progresses. 1028 * The shutter callback occurs after the image is captured. This can be used 1029 * to trigger a sound to let the user know that image has been captured. The 1030 * raw callback occurs when the raw image data is available (NOTE: the data 1031 * will be null if there is no raw image callback buffer available or the 1032 * raw image callback buffer is not large enough to hold the raw image). 1033 * The postview callback occurs when a scaled, fully processed postview 1034 * image is available (NOTE: not all hardware supports this). The jpeg 1035 * callback occurs when the compressed image is available. If the 1036 * application does not need a particular callback, a null can be passed 1037 * instead of a callback method. 1038 * 1039 * <p>This method is only valid when preview is active (after 1040 * {@link #startPreview()}). Preview will be stopped after the image is 1041 * taken; callers must call {@link #startPreview()} again if they want to 1042 * re-start preview or take more pictures. This should not be called between 1043 * {@link android.media.MediaRecorder#start()} and 1044 * {@link android.media.MediaRecorder#stop()}. 1045 * 1046 * <p>After calling this method, you must not call {@link #startPreview()} 1047 * or take another picture until the JPEG callback has returned. 1048 * 1049 * @param shutter the callback for image capture moment, or null 1050 * @param raw the callback for raw (uncompressed) image data, or null 1051 * @param postview callback with postview image data, may be null 1052 * @param jpeg the callback for JPEG image data, or null 1053 */ 1054 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 1055 PictureCallback postview, PictureCallback jpeg) { 1056 mShutterCallback = shutter; 1057 mRawImageCallback = raw; 1058 mPostviewCallback = postview; 1059 mJpegCallback = jpeg; 1060 1061 // If callback is not set, do not send me callbacks. 1062 int msgType = 0; 1063 if (mShutterCallback != null) { 1064 msgType |= CAMERA_MSG_SHUTTER; 1065 } 1066 if (mRawImageCallback != null) { 1067 msgType |= CAMERA_MSG_RAW_IMAGE; 1068 } 1069 if (mPostviewCallback != null) { 1070 msgType |= CAMERA_MSG_POSTVIEW_FRAME; 1071 } 1072 if (mJpegCallback != null) { 1073 msgType |= CAMERA_MSG_COMPRESSED_IMAGE; 1074 } 1075 1076 native_takePicture(msgType); 1077 mFaceDetectionRunning = false; 1078 } 1079 1080 /** 1081 * Zooms to the requested value smoothly. The driver will notify {@link 1082 * OnZoomChangeListener} of the zoom value and whether zoom is stopped at 1083 * the time. For example, suppose the current zoom is 0 and startSmoothZoom 1084 * is called with value 3. The 1085 * {@link Camera.OnZoomChangeListener#onZoomChange(int, boolean, Camera)} 1086 * method will be called three times with zoom values 1, 2, and 3. 1087 * Applications can call {@link #stopSmoothZoom} to stop the zoom earlier. 1088 * Applications should not call startSmoothZoom again or change the zoom 1089 * value before zoom stops. If the supplied zoom value equals to the current 1090 * zoom value, no zoom callback will be generated. This method is supported 1091 * if {@link android.hardware.Camera.Parameters#isSmoothZoomSupported} 1092 * returns true. 1093 * 1094 * @param value zoom value. The valid range is 0 to {@link 1095 * android.hardware.Camera.Parameters#getMaxZoom}. 1096 * @throws IllegalArgumentException if the zoom value is invalid. 1097 * @throws RuntimeException if the method fails. 1098 * @see #setZoomChangeListener(OnZoomChangeListener) 1099 */ 1100 public native final void startSmoothZoom(int value); 1101 1102 /** 1103 * Stops the smooth zoom. Applications should wait for the {@link 1104 * OnZoomChangeListener} to know when the zoom is actually stopped. This 1105 * method is supported if {@link 1106 * android.hardware.Camera.Parameters#isSmoothZoomSupported} is true. 1107 * 1108 * @throws RuntimeException if the method fails. 1109 */ 1110 public native final void stopSmoothZoom(); 1111 1112 /** 1113 * Set the clockwise rotation of preview display in degrees. This affects 1114 * the preview frames and the picture displayed after snapshot. This method 1115 * is useful for portrait mode applications. Note that preview display of 1116 * front-facing cameras is flipped horizontally before the rotation, that 1117 * is, the image is reflected along the central vertical axis of the camera 1118 * sensor. So the users can see themselves as looking into a mirror. 1119 * 1120 * <p>This does not affect the order of byte array passed in {@link 1121 * PreviewCallback#onPreviewFrame}, JPEG pictures, or recorded videos. This 1122 * method is not allowed to be called during preview. 1123 * 1124 * <p>If you want to make the camera image show in the same orientation as 1125 * the display, you can use the following code. 1126 * <pre> 1127 * public static void setCameraDisplayOrientation(Activity activity, 1128 * int cameraId, android.hardware.Camera camera) { 1129 * android.hardware.Camera.CameraInfo info = 1130 * new android.hardware.Camera.CameraInfo(); 1131 * android.hardware.Camera.getCameraInfo(cameraId, info); 1132 * int rotation = activity.getWindowManager().getDefaultDisplay() 1133 * .getRotation(); 1134 * int degrees = 0; 1135 * switch (rotation) { 1136 * case Surface.ROTATION_0: degrees = 0; break; 1137 * case Surface.ROTATION_90: degrees = 90; break; 1138 * case Surface.ROTATION_180: degrees = 180; break; 1139 * case Surface.ROTATION_270: degrees = 270; break; 1140 * } 1141 * 1142 * int result; 1143 * if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) { 1144 * result = (info.orientation + degrees) % 360; 1145 * result = (360 - result) % 360; // compensate the mirror 1146 * } else { // back-facing 1147 * result = (info.orientation - degrees + 360) % 360; 1148 * } 1149 * camera.setDisplayOrientation(result); 1150 * } 1151 * </pre> 1152 * 1153 * <p>Starting from API level 14, this method can be called when preview is 1154 * active. 1155 * 1156 * @param degrees the angle that the picture will be rotated clockwise. 1157 * Valid values are 0, 90, 180, and 270. The starting 1158 * position is 0 (landscape). 1159 * @see #setPreviewDisplay(SurfaceHolder) 1160 */ 1161 public native final void setDisplayOrientation(int degrees); 1162 1163 /** 1164 * <p>Enable or disable the default shutter sound when taking a picture.</p> 1165 * 1166 * <p>By default, the camera plays the system-defined camera shutter sound 1167 * when {@link #takePicture} is called. Using this method, the shutter sound 1168 * can be disabled. It is strongly recommended that an alternative shutter 1169 * sound is played in the {@link ShutterCallback} when the system shutter 1170 * sound is disabled.</p> 1171 * 1172 * <p>Note that devices may not always allow disabling the camera shutter 1173 * sound. If the shutter sound state cannot be set to the desired value, 1174 * this method will return false. {@link CameraInfo#canDisableShutterSound} 1175 * can be used to determine whether the device will allow the shutter sound 1176 * to be disabled.</p> 1177 * 1178 * @param enabled whether the camera should play the system shutter sound 1179 * when {@link #takePicture takePicture} is called. 1180 * @return {@code true} if the shutter sound state was successfully 1181 * changed. {@code false} if the shutter sound state could not be 1182 * changed. {@code true} is also returned if shutter sound playback 1183 * is already set to the requested state. 1184 * @see #takePicture 1185 * @see CameraInfo#canDisableShutterSound 1186 * @see ShutterCallback 1187 */ 1188 public native final boolean enableShutterSound(boolean enabled); 1189 1190 /** 1191 * Callback interface for zoom changes during a smooth zoom operation. 1192 * 1193 * @see #setZoomChangeListener(OnZoomChangeListener) 1194 * @see #startSmoothZoom(int) 1195 */ 1196 public interface OnZoomChangeListener 1197 { 1198 /** 1199 * Called when the zoom value has changed during a smooth zoom. 1200 * 1201 * @param zoomValue the current zoom value. In smooth zoom mode, camera 1202 * calls this for every new zoom value. 1203 * @param stopped whether smooth zoom is stopped. If the value is true, 1204 * this is the last zoom update for the application. 1205 * @param camera the Camera service object 1206 */ 1207 void onZoomChange(int zoomValue, boolean stopped, Camera camera); 1208 }; 1209 1210 /** 1211 * Registers a listener to be notified when the zoom value is updated by the 1212 * camera driver during smooth zoom. 1213 * 1214 * @param listener the listener to notify 1215 * @see #startSmoothZoom(int) 1216 */ 1217 public final void setZoomChangeListener(OnZoomChangeListener listener) 1218 { 1219 mZoomListener = listener; 1220 } 1221 1222 /** 1223 * Callback interface for face detected in the preview frame. 1224 * 1225 */ 1226 public interface FaceDetectionListener 1227 { 1228 /** 1229 * Notify the listener of the detected faces in the preview frame. 1230 * 1231 * @param faces The detected faces in a list 1232 * @param camera The {@link Camera} service object 1233 */ 1234 void onFaceDetection(Face[] faces, Camera camera); 1235 } 1236 1237 /** 1238 * Registers a listener to be notified about the faces detected in the 1239 * preview frame. 1240 * 1241 * @param listener the listener to notify 1242 * @see #startFaceDetection() 1243 */ 1244 public final void setFaceDetectionListener(FaceDetectionListener listener) 1245 { 1246 mFaceListener = listener; 1247 } 1248 1249 /** 1250 * Starts the face detection. This should be called after preview is started. 1251 * The camera will notify {@link FaceDetectionListener} of the detected 1252 * faces in the preview frame. The detected faces may be the same as the 1253 * previous ones. Applications should call {@link #stopFaceDetection} to 1254 * stop the face detection. This method is supported if {@link 1255 * Parameters#getMaxNumDetectedFaces()} returns a number larger than 0. 1256 * If the face detection has started, apps should not call this again. 1257 * 1258 * <p>When the face detection is running, {@link Parameters#setWhiteBalance(String)}, 1259 * {@link Parameters#setFocusAreas(List)}, and {@link Parameters#setMeteringAreas(List)} 1260 * have no effect. The camera uses the detected faces to do auto-white balance, 1261 * auto exposure, and autofocus. 1262 * 1263 * <p>If the apps call {@link #autoFocus(AutoFocusCallback)}, the camera 1264 * will stop sending face callbacks. The last face callback indicates the 1265 * areas used to do autofocus. After focus completes, face detection will 1266 * resume sending face callbacks. If the apps call {@link 1267 * #cancelAutoFocus()}, the face callbacks will also resume.</p> 1268 * 1269 * <p>After calling {@link #takePicture(Camera.ShutterCallback, Camera.PictureCallback, 1270 * Camera.PictureCallback)} or {@link #stopPreview()}, and then resuming 1271 * preview with {@link #startPreview()}, the apps should call this method 1272 * again to resume face detection.</p> 1273 * 1274 * @throws IllegalArgumentException if the face detection is unsupported. 1275 * @throws RuntimeException if the method fails or the face detection is 1276 * already running. 1277 * @see FaceDetectionListener 1278 * @see #stopFaceDetection() 1279 * @see Parameters#getMaxNumDetectedFaces() 1280 */ 1281 public final void startFaceDetection() { 1282 if (mFaceDetectionRunning) { 1283 throw new RuntimeException("Face detection is already running"); 1284 } 1285 _startFaceDetection(CAMERA_FACE_DETECTION_HW); 1286 mFaceDetectionRunning = true; 1287 } 1288 1289 /** 1290 * Stops the face detection. 1291 * 1292 * @see #startFaceDetection() 1293 */ 1294 public final void stopFaceDetection() { 1295 _stopFaceDetection(); 1296 mFaceDetectionRunning = false; 1297 } 1298 1299 private native final void _startFaceDetection(int type); 1300 private native final void _stopFaceDetection(); 1301 1302 /** 1303 * Information about a face identified through camera face detection. 1304 * 1305 * <p>When face detection is used with a camera, the {@link FaceDetectionListener} returns a 1306 * list of face objects for use in focusing and metering.</p> 1307 * 1308 * @see FaceDetectionListener 1309 */ 1310 public static class Face { 1311 /** 1312 * Create an empty face. 1313 */ 1314 public Face() { 1315 } 1316 1317 /** 1318 * Bounds of the face. (-1000, -1000) represents the top-left of the 1319 * camera field of view, and (1000, 1000) represents the bottom-right of 1320 * the field of view. For example, suppose the size of the viewfinder UI 1321 * is 800x480. The rect passed from the driver is (-1000, -1000, 0, 0). 1322 * The corresponding viewfinder rect should be (0, 0, 400, 240). It is 1323 * guaranteed left < right and top < bottom. The coordinates can be 1324 * smaller than -1000 or bigger than 1000. But at least one vertex will 1325 * be within (-1000, -1000) and (1000, 1000). 1326 * 1327 * <p>The direction is relative to the sensor orientation, that is, what 1328 * the sensor sees. The direction is not affected by the rotation or 1329 * mirroring of {@link #setDisplayOrientation(int)}. The face bounding 1330 * rectangle does not provide any information about face orientation.</p> 1331 * 1332 * <p>Here is the matrix to convert driver coordinates to View coordinates 1333 * in pixels.</p> 1334 * <pre> 1335 * Matrix matrix = new Matrix(); 1336 * CameraInfo info = CameraHolder.instance().getCameraInfo()[cameraId]; 1337 * // Need mirror for front camera. 1338 * boolean mirror = (info.facing == CameraInfo.CAMERA_FACING_FRONT); 1339 * matrix.setScale(mirror ? -1 : 1, 1); 1340 * // This is the value for android.hardware.Camera.setDisplayOrientation. 1341 * matrix.postRotate(displayOrientation); 1342 * // Camera driver coordinates range from (-1000, -1000) to (1000, 1000). 1343 * // UI coordinates range from (0, 0) to (width, height). 1344 * matrix.postScale(view.getWidth() / 2000f, view.getHeight() / 2000f); 1345 * matrix.postTranslate(view.getWidth() / 2f, view.getHeight() / 2f); 1346 * </pre> 1347 * 1348 * @see #startFaceDetection() 1349 */ 1350 public Rect rect; 1351 1352 /** 1353 * <p>The confidence level for the detection of the face. The range is 1 to 1354 * 100. 100 is the highest confidence.</p> 1355 * 1356 * <p>Depending on the device, even very low-confidence faces may be 1357 * listed, so applications should filter out faces with low confidence, 1358 * depending on the use case. For a typical point-and-shoot camera 1359 * application that wishes to display rectangles around detected faces, 1360 * filtering out faces with confidence less than 50 is recommended.</p> 1361 * 1362 * @see #startFaceDetection() 1363 */ 1364 public int score; 1365 1366 /** 1367 * An unique id per face while the face is visible to the tracker. If 1368 * the face leaves the field-of-view and comes back, it will get a new 1369 * id. This is an optional field, may not be supported on all devices. 1370 * If not supported, id will always be set to -1. The optional fields 1371 * are supported as a set. Either they are all valid, or none of them 1372 * are. 1373 */ 1374 public int id = -1; 1375 1376 /** 1377 * The coordinates of the center of the left eye. The coordinates are in 1378 * the same space as the ones for {@link #rect}. This is an optional 1379 * field, may not be supported on all devices. If not supported, the 1380 * value will always be set to null. The optional fields are supported 1381 * as a set. Either they are all valid, or none of them are. 1382 */ 1383 public Point leftEye = null; 1384 1385 /** 1386 * The coordinates of the center of the right eye. The coordinates are 1387 * in the same space as the ones for {@link #rect}.This is an optional 1388 * field, may not be supported on all devices. If not supported, the 1389 * value will always be set to null. The optional fields are supported 1390 * as a set. Either they are all valid, or none of them are. 1391 */ 1392 public Point rightEye = null; 1393 1394 /** 1395 * The coordinates of the center of the mouth. The coordinates are in 1396 * the same space as the ones for {@link #rect}. This is an optional 1397 * field, may not be supported on all devices. If not supported, the 1398 * value will always be set to null. The optional fields are supported 1399 * as a set. Either they are all valid, or none of them are. 1400 */ 1401 public Point mouth = null; 1402 } 1403 1404 // Error codes match the enum in include/ui/Camera.h 1405 1406 /** 1407 * Unspecified camera error. 1408 * @see Camera.ErrorCallback 1409 */ 1410 public static final int CAMERA_ERROR_UNKNOWN = 1; 1411 1412 /** 1413 * Media server died. In this case, the application must release the 1414 * Camera object and instantiate a new one. 1415 * @see Camera.ErrorCallback 1416 */ 1417 public static final int CAMERA_ERROR_SERVER_DIED = 100; 1418 1419 /** 1420 * Callback interface for camera error notification. 1421 * 1422 * @see #setErrorCallback(ErrorCallback) 1423 */ 1424 public interface ErrorCallback 1425 { 1426 /** 1427 * Callback for camera errors. 1428 * @param error error code: 1429 * <ul> 1430 * <li>{@link #CAMERA_ERROR_UNKNOWN} 1431 * <li>{@link #CAMERA_ERROR_SERVER_DIED} 1432 * </ul> 1433 * @param camera the Camera service object 1434 */ 1435 void onError(int error, Camera camera); 1436 }; 1437 1438 /** 1439 * Registers a callback to be invoked when an error occurs. 1440 * @param cb The callback to run 1441 */ 1442 public final void setErrorCallback(ErrorCallback cb) 1443 { 1444 mErrorCallback = cb; 1445 } 1446 1447 private native final void native_setParameters(String params); 1448 private native final String native_getParameters(); 1449 1450 /** 1451 * Changes the settings for this Camera service. 1452 * 1453 * @param params the Parameters to use for this Camera service 1454 * @throws RuntimeException if any parameter is invalid or not supported. 1455 * @see #getParameters() 1456 */ 1457 public void setParameters(Parameters params) { 1458 native_setParameters(params.flatten()); 1459 } 1460 1461 /** 1462 * Returns the current settings for this Camera service. 1463 * If modifications are made to the returned Parameters, they must be passed 1464 * to {@link #setParameters(Camera.Parameters)} to take effect. 1465 * 1466 * @see #setParameters(Camera.Parameters) 1467 */ 1468 public Parameters getParameters() { 1469 Parameters p = new Parameters(); 1470 String s = native_getParameters(); 1471 p.unflatten(s); 1472 return p; 1473 } 1474 1475 /** 1476 * Returns an empty {@link Parameters} for testing purpose. 1477 * 1478 * @return a Parameter object. 1479 * 1480 * @hide 1481 */ 1482 public static Parameters getEmptyParameters() { 1483 Camera camera = new Camera(); 1484 return camera.new Parameters(); 1485 } 1486 1487 /** 1488 * Image size (width and height dimensions). 1489 */ 1490 public class Size { 1491 /** 1492 * Sets the dimensions for pictures. 1493 * 1494 * @param w the photo width (pixels) 1495 * @param h the photo height (pixels) 1496 */ 1497 public Size(int w, int h) { 1498 width = w; 1499 height = h; 1500 } 1501 /** 1502 * Compares {@code obj} to this size. 1503 * 1504 * @param obj the object to compare this size with. 1505 * @return {@code true} if the width and height of {@code obj} is the 1506 * same as those of this size. {@code false} otherwise. 1507 */ 1508 @Override 1509 public boolean equals(Object obj) { 1510 if (!(obj instanceof Size)) { 1511 return false; 1512 } 1513 Size s = (Size) obj; 1514 return width == s.width && height == s.height; 1515 } 1516 @Override 1517 public int hashCode() { 1518 return width * 32713 + height; 1519 } 1520 /** width of the picture */ 1521 public int width; 1522 /** height of the picture */ 1523 public int height; 1524 }; 1525 1526 /** 1527 * <p>The Area class is used for choosing specific metering and focus areas for 1528 * the camera to use when calculating auto-exposure, auto-white balance, and 1529 * auto-focus.</p> 1530 * 1531 * <p>To find out how many simultaneous areas a given camera supports, use 1532 * {@link Parameters#getMaxNumMeteringAreas()} and 1533 * {@link Parameters#getMaxNumFocusAreas()}. If metering or focusing area 1534 * selection is unsupported, these methods will return 0.</p> 1535 * 1536 * <p>Each Area consists of a rectangle specifying its bounds, and a weight 1537 * that determines its importance. The bounds are relative to the camera's 1538 * current field of view. The coordinates are mapped so that (-1000, -1000) 1539 * is always the top-left corner of the current field of view, and (1000, 1540 * 1000) is always the bottom-right corner of the current field of 1541 * view. Setting Areas with bounds outside that range is not allowed. Areas 1542 * with zero or negative width or height are not allowed.</p> 1543 * 1544 * <p>The weight must range from 1 to 1000, and represents a weight for 1545 * every pixel in the area. This means that a large metering area with 1546 * the same weight as a smaller area will have more effect in the 1547 * metering result. Metering areas can overlap and the driver 1548 * will add the weights in the overlap region.</p> 1549 * 1550 * @see Parameters#setFocusAreas(List) 1551 * @see Parameters#getFocusAreas() 1552 * @see Parameters#getMaxNumFocusAreas() 1553 * @see Parameters#setMeteringAreas(List) 1554 * @see Parameters#getMeteringAreas() 1555 * @see Parameters#getMaxNumMeteringAreas() 1556 */ 1557 public static class Area { 1558 /** 1559 * Create an area with specified rectangle and weight. 1560 * 1561 * @param rect the bounds of the area. 1562 * @param weight the weight of the area. 1563 */ 1564 public Area(Rect rect, int weight) { 1565 this.rect = rect; 1566 this.weight = weight; 1567 } 1568 /** 1569 * Compares {@code obj} to this area. 1570 * 1571 * @param obj the object to compare this area with. 1572 * @return {@code true} if the rectangle and weight of {@code obj} is 1573 * the same as those of this area. {@code false} otherwise. 1574 */ 1575 @Override 1576 public boolean equals(Object obj) { 1577 if (!(obj instanceof Area)) { 1578 return false; 1579 } 1580 Area a = (Area) obj; 1581 if (rect == null) { 1582 if (a.rect != null) return false; 1583 } else { 1584 if (!rect.equals(a.rect)) return false; 1585 } 1586 return weight == a.weight; 1587 } 1588 1589 /** 1590 * Bounds of the area. (-1000, -1000) represents the top-left of the 1591 * camera field of view, and (1000, 1000) represents the bottom-right of 1592 * the field of view. Setting bounds outside that range is not 1593 * allowed. Bounds with zero or negative width or height are not 1594 * allowed. 1595 * 1596 * @see Parameters#getFocusAreas() 1597 * @see Parameters#getMeteringAreas() 1598 */ 1599 public Rect rect; 1600 1601 /** 1602 * Weight of the area. The weight must range from 1 to 1000, and 1603 * represents a weight for every pixel in the area. This means that a 1604 * large metering area with the same weight as a smaller area will have 1605 * more effect in the metering result. Metering areas can overlap and 1606 * the driver will add the weights in the overlap region. 1607 * 1608 * @see Parameters#getFocusAreas() 1609 * @see Parameters#getMeteringAreas() 1610 */ 1611 public int weight; 1612 } 1613 1614 /** 1615 * Camera service settings. 1616 * 1617 * <p>To make camera parameters take effect, applications have to call 1618 * {@link Camera#setParameters(Camera.Parameters)}. For example, after 1619 * {@link Camera.Parameters#setWhiteBalance} is called, white balance is not 1620 * actually changed until {@link Camera#setParameters(Camera.Parameters)} 1621 * is called with the changed parameters object. 1622 * 1623 * <p>Different devices may have different camera capabilities, such as 1624 * picture size or flash modes. The application should query the camera 1625 * capabilities before setting parameters. For example, the application 1626 * should call {@link Camera.Parameters#getSupportedColorEffects()} before 1627 * calling {@link Camera.Parameters#setColorEffect(String)}. If the 1628 * camera does not support color effects, 1629 * {@link Camera.Parameters#getSupportedColorEffects()} will return null. 1630 */ 1631 public class Parameters { 1632 // Parameter keys to communicate with the camera driver. 1633 private static final String KEY_PREVIEW_SIZE = "preview-size"; 1634 private static final String KEY_PREVIEW_FORMAT = "preview-format"; 1635 private static final String KEY_PREVIEW_FRAME_RATE = "preview-frame-rate"; 1636 private static final String KEY_PREVIEW_FPS_RANGE = "preview-fps-range"; 1637 private static final String KEY_PICTURE_SIZE = "picture-size"; 1638 private static final String KEY_PICTURE_FORMAT = "picture-format"; 1639 private static final String KEY_JPEG_THUMBNAIL_SIZE = "jpeg-thumbnail-size"; 1640 private static final String KEY_JPEG_THUMBNAIL_WIDTH = "jpeg-thumbnail-width"; 1641 private static final String KEY_JPEG_THUMBNAIL_HEIGHT = "jpeg-thumbnail-height"; 1642 private static final String KEY_JPEG_THUMBNAIL_QUALITY = "jpeg-thumbnail-quality"; 1643 private static final String KEY_JPEG_QUALITY = "jpeg-quality"; 1644 private static final String KEY_ROTATION = "rotation"; 1645 private static final String KEY_GPS_LATITUDE = "gps-latitude"; 1646 private static final String KEY_GPS_LONGITUDE = "gps-longitude"; 1647 private static final String KEY_GPS_ALTITUDE = "gps-altitude"; 1648 private static final String KEY_GPS_TIMESTAMP = "gps-timestamp"; 1649 private static final String KEY_GPS_PROCESSING_METHOD = "gps-processing-method"; 1650 private static final String KEY_WHITE_BALANCE = "whitebalance"; 1651 private static final String KEY_EFFECT = "effect"; 1652 private static final String KEY_ANTIBANDING = "antibanding"; 1653 private static final String KEY_SCENE_MODE = "scene-mode"; 1654 private static final String KEY_FLASH_MODE = "flash-mode"; 1655 private static final String KEY_FOCUS_MODE = "focus-mode"; 1656 private static final String KEY_FOCUS_AREAS = "focus-areas"; 1657 private static final String KEY_MAX_NUM_FOCUS_AREAS = "max-num-focus-areas"; 1658 private static final String KEY_FOCAL_LENGTH = "focal-length"; 1659 private static final String KEY_HORIZONTAL_VIEW_ANGLE = "horizontal-view-angle"; 1660 private static final String KEY_VERTICAL_VIEW_ANGLE = "vertical-view-angle"; 1661 private static final String KEY_EXPOSURE_COMPENSATION = "exposure-compensation"; 1662 private static final String KEY_MAX_EXPOSURE_COMPENSATION = "max-exposure-compensation"; 1663 private static final String KEY_MIN_EXPOSURE_COMPENSATION = "min-exposure-compensation"; 1664 private static final String KEY_EXPOSURE_COMPENSATION_STEP = "exposure-compensation-step"; 1665 private static final String KEY_AUTO_EXPOSURE_LOCK = "auto-exposure-lock"; 1666 private static final String KEY_AUTO_EXPOSURE_LOCK_SUPPORTED = "auto-exposure-lock-supported"; 1667 private static final String KEY_AUTO_WHITEBALANCE_LOCK = "auto-whitebalance-lock"; 1668 private static final String KEY_AUTO_WHITEBALANCE_LOCK_SUPPORTED = "auto-whitebalance-lock-supported"; 1669 private static final String KEY_METERING_AREAS = "metering-areas"; 1670 private static final String KEY_MAX_NUM_METERING_AREAS = "max-num-metering-areas"; 1671 private static final String KEY_ZOOM = "zoom"; 1672 private static final String KEY_MAX_ZOOM = "max-zoom"; 1673 private static final String KEY_ZOOM_RATIOS = "zoom-ratios"; 1674 private static final String KEY_ZOOM_SUPPORTED = "zoom-supported"; 1675 private static final String KEY_SMOOTH_ZOOM_SUPPORTED = "smooth-zoom-supported"; 1676 private static final String KEY_FOCUS_DISTANCES = "focus-distances"; 1677 private static final String KEY_VIDEO_SIZE = "video-size"; 1678 private static final String KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO = 1679 "preferred-preview-size-for-video"; 1680 private static final String KEY_MAX_NUM_DETECTED_FACES_HW = "max-num-detected-faces-hw"; 1681 private static final String KEY_MAX_NUM_DETECTED_FACES_SW = "max-num-detected-faces-sw"; 1682 private static final String KEY_RECORDING_HINT = "recording-hint"; 1683 private static final String KEY_VIDEO_SNAPSHOT_SUPPORTED = "video-snapshot-supported"; 1684 private static final String KEY_VIDEO_STABILIZATION = "video-stabilization"; 1685 private static final String KEY_VIDEO_STABILIZATION_SUPPORTED = "video-stabilization-supported"; 1686 1687 // Parameter key suffix for supported values. 1688 private static final String SUPPORTED_VALUES_SUFFIX = "-values"; 1689 1690 private static final String TRUE = "true"; 1691 private static final String FALSE = "false"; 1692 1693 // Values for white balance settings. 1694 public static final String WHITE_BALANCE_AUTO = "auto"; 1695 public static final String WHITE_BALANCE_INCANDESCENT = "incandescent"; 1696 public static final String WHITE_BALANCE_FLUORESCENT = "fluorescent"; 1697 public static final String WHITE_BALANCE_WARM_FLUORESCENT = "warm-fluorescent"; 1698 public static final String WHITE_BALANCE_DAYLIGHT = "daylight"; 1699 public static final String WHITE_BALANCE_CLOUDY_DAYLIGHT = "cloudy-daylight"; 1700 public static final String WHITE_BALANCE_TWILIGHT = "twilight"; 1701 public static final String WHITE_BALANCE_SHADE = "shade"; 1702 1703 // Values for color effect settings. 1704 public static final String EFFECT_NONE = "none"; 1705 public static final String EFFECT_MONO = "mono"; 1706 public static final String EFFECT_NEGATIVE = "negative"; 1707 public static final String EFFECT_SOLARIZE = "solarize"; 1708 public static final String EFFECT_SEPIA = "sepia"; 1709 public static final String EFFECT_POSTERIZE = "posterize"; 1710 public static final String EFFECT_WHITEBOARD = "whiteboard"; 1711 public static final String EFFECT_BLACKBOARD = "blackboard"; 1712 public static final String EFFECT_AQUA = "aqua"; 1713 1714 // Values for antibanding settings. 1715 public static final String ANTIBANDING_AUTO = "auto"; 1716 public static final String ANTIBANDING_50HZ = "50hz"; 1717 public static final String ANTIBANDING_60HZ = "60hz"; 1718 public static final String ANTIBANDING_OFF = "off"; 1719 1720 // Values for flash mode settings. 1721 /** 1722 * Flash will not be fired. 1723 */ 1724 public static final String FLASH_MODE_OFF = "off"; 1725 1726 /** 1727 * Flash will be fired automatically when required. The flash may be fired 1728 * during preview, auto-focus, or snapshot depending on the driver. 1729 */ 1730 public static final String FLASH_MODE_AUTO = "auto"; 1731 1732 /** 1733 * Flash will always be fired during snapshot. The flash may also be 1734 * fired during preview or auto-focus depending on the driver. 1735 */ 1736 public static final String FLASH_MODE_ON = "on"; 1737 1738 /** 1739 * Flash will be fired in red-eye reduction mode. 1740 */ 1741 public static final String FLASH_MODE_RED_EYE = "red-eye"; 1742 1743 /** 1744 * Constant emission of light during preview, auto-focus and snapshot. 1745 * This can also be used for video recording. 1746 */ 1747 public static final String FLASH_MODE_TORCH = "torch"; 1748 1749 /** 1750 * Scene mode is off. 1751 */ 1752 public static final String SCENE_MODE_AUTO = "auto"; 1753 1754 /** 1755 * Take photos of fast moving objects. Same as {@link 1756 * #SCENE_MODE_SPORTS}. 1757 */ 1758 public static final String SCENE_MODE_ACTION = "action"; 1759 1760 /** 1761 * Take people pictures. 1762 */ 1763 public static final String SCENE_MODE_PORTRAIT = "portrait"; 1764 1765 /** 1766 * Take pictures on distant objects. 1767 */ 1768 public static final String SCENE_MODE_LANDSCAPE = "landscape"; 1769 1770 /** 1771 * Take photos at night. 1772 */ 1773 public static final String SCENE_MODE_NIGHT = "night"; 1774 1775 /** 1776 * Take people pictures at night. 1777 */ 1778 public static final String SCENE_MODE_NIGHT_PORTRAIT = "night-portrait"; 1779 1780 /** 1781 * Take photos in a theater. Flash light is off. 1782 */ 1783 public static final String SCENE_MODE_THEATRE = "theatre"; 1784 1785 /** 1786 * Take pictures on the beach. 1787 */ 1788 public static final String SCENE_MODE_BEACH = "beach"; 1789 1790 /** 1791 * Take pictures on the snow. 1792 */ 1793 public static final String SCENE_MODE_SNOW = "snow"; 1794 1795 /** 1796 * Take sunset photos. 1797 */ 1798 public static final String SCENE_MODE_SUNSET = "sunset"; 1799 1800 /** 1801 * Avoid blurry pictures (for example, due to hand shake). 1802 */ 1803 public static final String SCENE_MODE_STEADYPHOTO = "steadyphoto"; 1804 1805 /** 1806 * For shooting firework displays. 1807 */ 1808 public static final String SCENE_MODE_FIREWORKS = "fireworks"; 1809 1810 /** 1811 * Take photos of fast moving objects. Same as {@link 1812 * #SCENE_MODE_ACTION}. 1813 */ 1814 public static final String SCENE_MODE_SPORTS = "sports"; 1815 1816 /** 1817 * Take indoor low-light shot. 1818 */ 1819 public static final String SCENE_MODE_PARTY = "party"; 1820 1821 /** 1822 * Capture the naturally warm color of scenes lit by candles. 1823 */ 1824 public static final String SCENE_MODE_CANDLELIGHT = "candlelight"; 1825 1826 /** 1827 * Applications are looking for a barcode. Camera driver will be 1828 * optimized for barcode reading. 1829 */ 1830 public static final String SCENE_MODE_BARCODE = "barcode"; 1831 1832 /** 1833 * Capture a scene using high dynamic range imaging techniques. The 1834 * camera will return an image that has an extended dynamic range 1835 * compared to a regular capture. Capturing such an image may take 1836 * longer than a regular capture. 1837 */ 1838 public static final String SCENE_MODE_HDR = "hdr"; 1839 1840 /** 1841 * Auto-focus mode. Applications should call {@link 1842 * #autoFocus(AutoFocusCallback)} to start the focus in this mode. 1843 */ 1844 public static final String FOCUS_MODE_AUTO = "auto"; 1845 1846 /** 1847 * Focus is set at infinity. Applications should not call 1848 * {@link #autoFocus(AutoFocusCallback)} in this mode. 1849 */ 1850 public static final String FOCUS_MODE_INFINITY = "infinity"; 1851 1852 /** 1853 * Macro (close-up) focus mode. Applications should call 1854 * {@link #autoFocus(AutoFocusCallback)} to start the focus in this 1855 * mode. 1856 */ 1857 public static final String FOCUS_MODE_MACRO = "macro"; 1858 1859 /** 1860 * Focus is fixed. The camera is always in this mode if the focus is not 1861 * adjustable. If the camera has auto-focus, this mode can fix the 1862 * focus, which is usually at hyperfocal distance. Applications should 1863 * not call {@link #autoFocus(AutoFocusCallback)} in this mode. 1864 */ 1865 public static final String FOCUS_MODE_FIXED = "fixed"; 1866 1867 /** 1868 * Extended depth of field (EDOF). Focusing is done digitally and 1869 * continuously. Applications should not call {@link 1870 * #autoFocus(AutoFocusCallback)} in this mode. 1871 */ 1872 public static final String FOCUS_MODE_EDOF = "edof"; 1873 1874 /** 1875 * Continuous auto focus mode intended for video recording. The camera 1876 * continuously tries to focus. This is the best choice for video 1877 * recording because the focus changes smoothly . Applications still can 1878 * call {@link #takePicture(Camera.ShutterCallback, 1879 * Camera.PictureCallback, Camera.PictureCallback)} in this mode but the 1880 * subject may not be in focus. Auto focus starts when the parameter is 1881 * set. 1882 * 1883 * <p>Since API level 14, applications can call {@link 1884 * #autoFocus(AutoFocusCallback)} in this mode. The focus callback will 1885 * immediately return with a boolean that indicates whether the focus is 1886 * sharp or not. The focus position is locked after autoFocus call. If 1887 * applications want to resume the continuous focus, cancelAutoFocus 1888 * must be called. Restarting the preview will not resume the continuous 1889 * autofocus. To stop continuous focus, applications should change the 1890 * focus mode to other modes. 1891 * 1892 * @see #FOCUS_MODE_CONTINUOUS_PICTURE 1893 */ 1894 public static final String FOCUS_MODE_CONTINUOUS_VIDEO = "continuous-video"; 1895 1896 /** 1897 * Continuous auto focus mode intended for taking pictures. The camera 1898 * continuously tries to focus. The speed of focus change is more 1899 * aggressive than {@link #FOCUS_MODE_CONTINUOUS_VIDEO}. Auto focus 1900 * starts when the parameter is set. 1901 * 1902 * <p>Applications can call {@link #autoFocus(AutoFocusCallback)} in 1903 * this mode. If the autofocus is in the middle of scanning, the focus 1904 * callback will return when it completes. If the autofocus is not 1905 * scanning, the focus callback will immediately return with a boolean 1906 * that indicates whether the focus is sharp or not. The apps can then 1907 * decide if they want to take a picture immediately or to change the 1908 * focus mode to auto, and run a full autofocus cycle. The focus 1909 * position is locked after autoFocus call. If applications want to 1910 * resume the continuous focus, cancelAutoFocus must be called. 1911 * Restarting the preview will not resume the continuous autofocus. To 1912 * stop continuous focus, applications should change the focus mode to 1913 * other modes. 1914 * 1915 * @see #FOCUS_MODE_CONTINUOUS_VIDEO 1916 */ 1917 public static final String FOCUS_MODE_CONTINUOUS_PICTURE = "continuous-picture"; 1918 1919 // Indices for focus distance array. 1920 /** 1921 * The array index of near focus distance for use with 1922 * {@link #getFocusDistances(float[])}. 1923 */ 1924 public static final int FOCUS_DISTANCE_NEAR_INDEX = 0; 1925 1926 /** 1927 * The array index of optimal focus distance for use with 1928 * {@link #getFocusDistances(float[])}. 1929 */ 1930 public static final int FOCUS_DISTANCE_OPTIMAL_INDEX = 1; 1931 1932 /** 1933 * The array index of far focus distance for use with 1934 * {@link #getFocusDistances(float[])}. 1935 */ 1936 public static final int FOCUS_DISTANCE_FAR_INDEX = 2; 1937 1938 /** 1939 * The array index of minimum preview fps for use with {@link 1940 * #getPreviewFpsRange(int[])} or {@link 1941 * #getSupportedPreviewFpsRange()}. 1942 */ 1943 public static final int PREVIEW_FPS_MIN_INDEX = 0; 1944 1945 /** 1946 * The array index of maximum preview fps for use with {@link 1947 * #getPreviewFpsRange(int[])} or {@link 1948 * #getSupportedPreviewFpsRange()}. 1949 */ 1950 public static final int PREVIEW_FPS_MAX_INDEX = 1; 1951 1952 // Formats for setPreviewFormat and setPictureFormat. 1953 private static final String PIXEL_FORMAT_YUV422SP = "yuv422sp"; 1954 private static final String PIXEL_FORMAT_YUV420SP = "yuv420sp"; 1955 private static final String PIXEL_FORMAT_YUV422I = "yuv422i-yuyv"; 1956 private static final String PIXEL_FORMAT_YUV420P = "yuv420p"; 1957 private static final String PIXEL_FORMAT_RGB565 = "rgb565"; 1958 private static final String PIXEL_FORMAT_JPEG = "jpeg"; 1959 private static final String PIXEL_FORMAT_BAYER_RGGB = "bayer-rggb"; 1960 1961 private HashMap<String, String> mMap; 1962 1963 private Parameters() { 1964 mMap = new HashMap<String, String>(64); 1965 } 1966 1967 /** 1968 * Writes the current Parameters to the log. 1969 * @hide 1970 * @deprecated 1971 */ 1972 public void dump() { 1973 Log.e(TAG, "dump: size=" + mMap.size()); 1974 for (String k : mMap.keySet()) { 1975 Log.e(TAG, "dump: " + k + "=" + mMap.get(k)); 1976 } 1977 } 1978 1979 /** 1980 * Creates a single string with all the parameters set in 1981 * this Parameters object. 1982 * <p>The {@link #unflatten(String)} method does the reverse.</p> 1983 * 1984 * @return a String with all values from this Parameters object, in 1985 * semi-colon delimited key-value pairs 1986 */ 1987 public String flatten() { 1988 StringBuilder flattened = new StringBuilder(128); 1989 for (String k : mMap.keySet()) { 1990 flattened.append(k); 1991 flattened.append("="); 1992 flattened.append(mMap.get(k)); 1993 flattened.append(";"); 1994 } 1995 // chop off the extra semicolon at the end 1996 flattened.deleteCharAt(flattened.length()-1); 1997 return flattened.toString(); 1998 } 1999 2000 /** 2001 * Takes a flattened string of parameters and adds each one to 2002 * this Parameters object. 2003 * <p>The {@link #flatten()} method does the reverse.</p> 2004 * 2005 * @param flattened a String of parameters (key-value paired) that 2006 * are semi-colon delimited 2007 */ 2008 public void unflatten(String flattened) { 2009 mMap.clear(); 2010 2011 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(';'); 2012 splitter.setString(flattened); 2013 for (String kv : splitter) { 2014 int pos = kv.indexOf('='); 2015 if (pos == -1) { 2016 continue; 2017 } 2018 String k = kv.substring(0, pos); 2019 String v = kv.substring(pos + 1); 2020 mMap.put(k, v); 2021 } 2022 } 2023 2024 public void remove(String key) { 2025 mMap.remove(key); 2026 } 2027 2028 /** 2029 * Sets a String parameter. 2030 * 2031 * @param key the key name for the parameter 2032 * @param value the String value of the parameter 2033 */ 2034 public void set(String key, String value) { 2035 if (key.indexOf('=') != -1 || key.indexOf(';') != -1 || key.indexOf(0) != -1) { 2036 Log.e(TAG, "Key \"" + key + "\" contains invalid character (= or ; or \\0)"); 2037 return; 2038 } 2039 if (value.indexOf('=') != -1 || value.indexOf(';') != -1 || value.indexOf(0) != -1) { 2040 Log.e(TAG, "Value \"" + value + "\" contains invalid character (= or ; or \\0)"); 2041 return; 2042 } 2043 2044 mMap.put(key, value); 2045 } 2046 2047 /** 2048 * Sets an integer parameter. 2049 * 2050 * @param key the key name for the parameter 2051 * @param value the int value of the parameter 2052 */ 2053 public void set(String key, int value) { 2054 mMap.put(key, Integer.toString(value)); 2055 } 2056 2057 private void set(String key, List<Area> areas) { 2058 if (areas == null) { 2059 set(key, "(0,0,0,0,0)"); 2060 } else { 2061 StringBuilder buffer = new StringBuilder(); 2062 for (int i = 0; i < areas.size(); i++) { 2063 Area area = areas.get(i); 2064 Rect rect = area.rect; 2065 buffer.append('('); 2066 buffer.append(rect.left); 2067 buffer.append(','); 2068 buffer.append(rect.top); 2069 buffer.append(','); 2070 buffer.append(rect.right); 2071 buffer.append(','); 2072 buffer.append(rect.bottom); 2073 buffer.append(','); 2074 buffer.append(area.weight); 2075 buffer.append(')'); 2076 if (i != areas.size() - 1) buffer.append(','); 2077 } 2078 set(key, buffer.toString()); 2079 } 2080 } 2081 2082 /** 2083 * Returns the value of a String parameter. 2084 * 2085 * @param key the key name for the parameter 2086 * @return the String value of the parameter 2087 */ 2088 public String get(String key) { 2089 return mMap.get(key); 2090 } 2091 2092 /** 2093 * Returns the value of an integer parameter. 2094 * 2095 * @param key the key name for the parameter 2096 * @return the int value of the parameter 2097 */ 2098 public int getInt(String key) { 2099 return Integer.parseInt(mMap.get(key)); 2100 } 2101 2102 /** 2103 * Sets the dimensions for preview pictures. If the preview has already 2104 * started, applications should stop the preview first before changing 2105 * preview size. 2106 * 2107 * The sides of width and height are based on camera orientation. That 2108 * is, the preview size is the size before it is rotated by display 2109 * orientation. So applications need to consider the display orientation 2110 * while setting preview size. For example, suppose the camera supports 2111 * both 480x320 and 320x480 preview sizes. The application wants a 3:2 2112 * preview ratio. If the display orientation is set to 0 or 180, preview 2113 * size should be set to 480x320. If the display orientation is set to 2114 * 90 or 270, preview size should be set to 320x480. The display 2115 * orientation should also be considered while setting picture size and 2116 * thumbnail size. 2117 * 2118 * @param width the width of the pictures, in pixels 2119 * @param height the height of the pictures, in pixels 2120 * @see #setDisplayOrientation(int) 2121 * @see #getCameraInfo(int, CameraInfo) 2122 * @see #setPictureSize(int, int) 2123 * @see #setJpegThumbnailSize(int, int) 2124 */ 2125 public void setPreviewSize(int width, int height) { 2126 String v = Integer.toString(width) + "x" + Integer.toString(height); 2127 set(KEY_PREVIEW_SIZE, v); 2128 } 2129 2130 /** 2131 * Returns the dimensions setting for preview pictures. 2132 * 2133 * @return a Size object with the width and height setting 2134 * for the preview picture 2135 */ 2136 public Size getPreviewSize() { 2137 String pair = get(KEY_PREVIEW_SIZE); 2138 return strToSize(pair); 2139 } 2140 2141 /** 2142 * Gets the supported preview sizes. 2143 * 2144 * @return a list of Size object. This method will always return a list 2145 * with at least one element. 2146 */ 2147 public List<Size> getSupportedPreviewSizes() { 2148 String str = get(KEY_PREVIEW_SIZE + SUPPORTED_VALUES_SUFFIX); 2149 return splitSize(str); 2150 } 2151 2152 /** 2153 * <p>Gets the supported video frame sizes that can be used by 2154 * MediaRecorder.</p> 2155 * 2156 * <p>If the returned list is not null, the returned list will contain at 2157 * least one Size and one of the sizes in the returned list must be 2158 * passed to MediaRecorder.setVideoSize() for camcorder application if 2159 * camera is used as the video source. In this case, the size of the 2160 * preview can be different from the resolution of the recorded video 2161 * during video recording.</p> 2162 * 2163 * @return a list of Size object if camera has separate preview and 2164 * video output; otherwise, null is returned. 2165 * @see #getPreferredPreviewSizeForVideo() 2166 */ 2167 public List<Size> getSupportedVideoSizes() { 2168 String str = get(KEY_VIDEO_SIZE + SUPPORTED_VALUES_SUFFIX); 2169 return splitSize(str); 2170 } 2171 2172 /** 2173 * Returns the preferred or recommended preview size (width and height) 2174 * in pixels for video recording. Camcorder applications should 2175 * set the preview size to a value that is not larger than the 2176 * preferred preview size. In other words, the product of the width 2177 * and height of the preview size should not be larger than that of 2178 * the preferred preview size. In addition, we recommend to choose a 2179 * preview size that has the same aspect ratio as the resolution of 2180 * video to be recorded. 2181 * 2182 * @return the preferred preview size (width and height) in pixels for 2183 * video recording if getSupportedVideoSizes() does not return 2184 * null; otherwise, null is returned. 2185 * @see #getSupportedVideoSizes() 2186 */ 2187 public Size getPreferredPreviewSizeForVideo() { 2188 String pair = get(KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO); 2189 return strToSize(pair); 2190 } 2191 2192 /** 2193 * <p>Sets the dimensions for EXIF thumbnail in Jpeg picture. If 2194 * applications set both width and height to 0, EXIF will not contain 2195 * thumbnail.</p> 2196 * 2197 * <p>Applications need to consider the display orientation. See {@link 2198 * #setPreviewSize(int,int)} for reference.</p> 2199 * 2200 * @param width the width of the thumbnail, in pixels 2201 * @param height the height of the thumbnail, in pixels 2202 * @see #setPreviewSize(int,int) 2203 */ 2204 public void setJpegThumbnailSize(int width, int height) { 2205 set(KEY_JPEG_THUMBNAIL_WIDTH, width); 2206 set(KEY_JPEG_THUMBNAIL_HEIGHT, height); 2207 } 2208 2209 /** 2210 * Returns the dimensions for EXIF thumbnail in Jpeg picture. 2211 * 2212 * @return a Size object with the height and width setting for the EXIF 2213 * thumbnails 2214 */ 2215 public Size getJpegThumbnailSize() { 2216 return new Size(getInt(KEY_JPEG_THUMBNAIL_WIDTH), 2217 getInt(KEY_JPEG_THUMBNAIL_HEIGHT)); 2218 } 2219 2220 /** 2221 * Gets the supported jpeg thumbnail sizes. 2222 * 2223 * @return a list of Size object. This method will always return a list 2224 * with at least two elements. Size 0,0 (no thumbnail) is always 2225 * supported. 2226 */ 2227 public List<Size> getSupportedJpegThumbnailSizes() { 2228 String str = get(KEY_JPEG_THUMBNAIL_SIZE + SUPPORTED_VALUES_SUFFIX); 2229 return splitSize(str); 2230 } 2231 2232 /** 2233 * Sets the quality of the EXIF thumbnail in Jpeg picture. 2234 * 2235 * @param quality the JPEG quality of the EXIF thumbnail. The range is 1 2236 * to 100, with 100 being the best. 2237 */ 2238 public void setJpegThumbnailQuality(int quality) { 2239 set(KEY_JPEG_THUMBNAIL_QUALITY, quality); 2240 } 2241 2242 /** 2243 * Returns the quality setting for the EXIF thumbnail in Jpeg picture. 2244 * 2245 * @return the JPEG quality setting of the EXIF thumbnail. 2246 */ 2247 public int getJpegThumbnailQuality() { 2248 return getInt(KEY_JPEG_THUMBNAIL_QUALITY); 2249 } 2250 2251 /** 2252 * Sets Jpeg quality of captured picture. 2253 * 2254 * @param quality the JPEG quality of captured picture. The range is 1 2255 * to 100, with 100 being the best. 2256 */ 2257 public void setJpegQuality(int quality) { 2258 set(KEY_JPEG_QUALITY, quality); 2259 } 2260 2261 /** 2262 * Returns the quality setting for the JPEG picture. 2263 * 2264 * @return the JPEG picture quality setting. 2265 */ 2266 public int getJpegQuality() { 2267 return getInt(KEY_JPEG_QUALITY); 2268 } 2269 2270 /** 2271 * Sets the rate at which preview frames are received. This is the 2272 * target frame rate. The actual frame rate depends on the driver. 2273 * 2274 * @param fps the frame rate (frames per second) 2275 * @deprecated replaced by {@link #setPreviewFpsRange(int,int)} 2276 */ 2277 @Deprecated 2278 public void setPreviewFrameRate(int fps) { 2279 set(KEY_PREVIEW_FRAME_RATE, fps); 2280 } 2281 2282 /** 2283 * Returns the setting for the rate at which preview frames are 2284 * received. This is the target frame rate. The actual frame rate 2285 * depends on the driver. 2286 * 2287 * @return the frame rate setting (frames per second) 2288 * @deprecated replaced by {@link #getPreviewFpsRange(int[])} 2289 */ 2290 @Deprecated 2291 public int getPreviewFrameRate() { 2292 return getInt(KEY_PREVIEW_FRAME_RATE); 2293 } 2294 2295 /** 2296 * Gets the supported preview frame rates. 2297 * 2298 * @return a list of supported preview frame rates. null if preview 2299 * frame rate setting is not supported. 2300 * @deprecated replaced by {@link #getSupportedPreviewFpsRange()} 2301 */ 2302 @Deprecated 2303 public List<Integer> getSupportedPreviewFrameRates() { 2304 String str = get(KEY_PREVIEW_FRAME_RATE + SUPPORTED_VALUES_SUFFIX); 2305 return splitInt(str); 2306 } 2307 2308 /** 2309 * Sets the maximum and maximum preview fps. This controls the rate of 2310 * preview frames received in {@link PreviewCallback}. The minimum and 2311 * maximum preview fps must be one of the elements from {@link 2312 * #getSupportedPreviewFpsRange}. 2313 * 2314 * @param min the minimum preview fps (scaled by 1000). 2315 * @param max the maximum preview fps (scaled by 1000). 2316 * @throws RuntimeException if fps range is invalid. 2317 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 2318 * @see #getSupportedPreviewFpsRange() 2319 */ 2320 public void setPreviewFpsRange(int min, int max) { 2321 set(KEY_PREVIEW_FPS_RANGE, "" + min + "," + max); 2322 } 2323 2324 /** 2325 * Returns the current minimum and maximum preview fps. The values are 2326 * one of the elements returned by {@link #getSupportedPreviewFpsRange}. 2327 * 2328 * @return range the minimum and maximum preview fps (scaled by 1000). 2329 * @see #PREVIEW_FPS_MIN_INDEX 2330 * @see #PREVIEW_FPS_MAX_INDEX 2331 * @see #getSupportedPreviewFpsRange() 2332 */ 2333 public void getPreviewFpsRange(int[] range) { 2334 if (range == null || range.length != 2) { 2335 throw new IllegalArgumentException( 2336 "range must be an array with two elements."); 2337 } 2338 splitInt(get(KEY_PREVIEW_FPS_RANGE), range); 2339 } 2340 2341 /** 2342 * Gets the supported preview fps (frame-per-second) ranges. Each range 2343 * contains a minimum fps and maximum fps. If minimum fps equals to 2344 * maximum fps, the camera outputs frames in fixed frame rate. If not, 2345 * the camera outputs frames in auto frame rate. The actual frame rate 2346 * fluctuates between the minimum and the maximum. The values are 2347 * multiplied by 1000 and represented in integers. For example, if frame 2348 * rate is 26.623 frames per second, the value is 26623. 2349 * 2350 * @return a list of supported preview fps ranges. This method returns a 2351 * list with at least one element. Every element is an int array 2352 * of two values - minimum fps and maximum fps. The list is 2353 * sorted from small to large (first by maximum fps and then 2354 * minimum fps). 2355 * @see #PREVIEW_FPS_MIN_INDEX 2356 * @see #PREVIEW_FPS_MAX_INDEX 2357 */ 2358 public List<int[]> getSupportedPreviewFpsRange() { 2359 String str = get(KEY_PREVIEW_FPS_RANGE + SUPPORTED_VALUES_SUFFIX); 2360 return splitRange(str); 2361 } 2362 2363 /** 2364 * Sets the image format for preview pictures. 2365 * <p>If this is never called, the default format will be 2366 * {@link android.graphics.ImageFormat#NV21}, which 2367 * uses the NV21 encoding format.</p> 2368 * 2369 * <p>Use {@link Parameters#getSupportedPreviewFormats} to get a list of 2370 * the available preview formats. 2371 * 2372 * <p>It is strongly recommended that either 2373 * {@link android.graphics.ImageFormat#NV21} or 2374 * {@link android.graphics.ImageFormat#YV12} is used, since 2375 * they are supported by all camera devices.</p> 2376 * 2377 * <p>For YV12, the image buffer that is received is not necessarily 2378 * tightly packed, as there may be padding at the end of each row of 2379 * pixel data, as described in 2380 * {@link android.graphics.ImageFormat#YV12}. For camera callback data, 2381 * it can be assumed that the stride of the Y and UV data is the 2382 * smallest possible that meets the alignment requirements. That is, if 2383 * the preview size is <var>width x height</var>, then the following 2384 * equations describe the buffer index for the beginning of row 2385 * <var>y</var> for the Y plane and row <var>c</var> for the U and V 2386 * planes: 2387 * 2388 * {@code 2389 * <pre> 2390 * yStride = (int) ceil(width / 16.0) * 16; 2391 * uvStride = (int) ceil( (yStride / 2) / 16.0) * 16; 2392 * ySize = yStride * height; 2393 * uvSize = uvStride * height / 2; 2394 * yRowIndex = yStride * y; 2395 * uRowIndex = ySize + uvSize + uvStride * c; 2396 * vRowIndex = ySize + uvStride * c; 2397 * size = ySize + uvSize * 2;</pre> 2398 * } 2399 * 2400 * @param pixel_format the desired preview picture format, defined by 2401 * one of the {@link android.graphics.ImageFormat} constants. (E.g., 2402 * <var>ImageFormat.NV21</var> (default), or 2403 * <var>ImageFormat.YV12</var>) 2404 * 2405 * @see android.graphics.ImageFormat 2406 * @see android.hardware.Camera.Parameters#getSupportedPreviewFormats 2407 */ 2408 public void setPreviewFormat(int pixel_format) { 2409 String s = cameraFormatForPixelFormat(pixel_format); 2410 if (s == null) { 2411 throw new IllegalArgumentException( 2412 "Invalid pixel_format=" + pixel_format); 2413 } 2414 2415 set(KEY_PREVIEW_FORMAT, s); 2416 } 2417 2418 /** 2419 * Returns the image format for preview frames got from 2420 * {@link PreviewCallback}. 2421 * 2422 * @return the preview format. 2423 * @see android.graphics.ImageFormat 2424 * @see #setPreviewFormat 2425 */ 2426 public int getPreviewFormat() { 2427 return pixelFormatForCameraFormat(get(KEY_PREVIEW_FORMAT)); 2428 } 2429 2430 /** 2431 * Gets the supported preview formats. {@link android.graphics.ImageFormat#NV21} 2432 * is always supported. {@link android.graphics.ImageFormat#YV12} 2433 * is always supported since API level 12. 2434 * 2435 * @return a list of supported preview formats. This method will always 2436 * return a list with at least one element. 2437 * @see android.graphics.ImageFormat 2438 * @see #setPreviewFormat 2439 */ 2440 public List<Integer> getSupportedPreviewFormats() { 2441 String str = get(KEY_PREVIEW_FORMAT + SUPPORTED_VALUES_SUFFIX); 2442 ArrayList<Integer> formats = new ArrayList<Integer>(); 2443 for (String s : split(str)) { 2444 int f = pixelFormatForCameraFormat(s); 2445 if (f == ImageFormat.UNKNOWN) continue; 2446 formats.add(f); 2447 } 2448 return formats; 2449 } 2450 2451 /** 2452 * <p>Sets the dimensions for pictures.</p> 2453 * 2454 * <p>Applications need to consider the display orientation. See {@link 2455 * #setPreviewSize(int,int)} for reference.</p> 2456 * 2457 * @param width the width for pictures, in pixels 2458 * @param height the height for pictures, in pixels 2459 * @see #setPreviewSize(int,int) 2460 * 2461 */ 2462 public void setPictureSize(int width, int height) { 2463 String v = Integer.toString(width) + "x" + Integer.toString(height); 2464 set(KEY_PICTURE_SIZE, v); 2465 } 2466 2467 /** 2468 * Returns the dimension setting for pictures. 2469 * 2470 * @return a Size object with the height and width setting 2471 * for pictures 2472 */ 2473 public Size getPictureSize() { 2474 String pair = get(KEY_PICTURE_SIZE); 2475 return strToSize(pair); 2476 } 2477 2478 /** 2479 * Gets the supported picture sizes. 2480 * 2481 * @return a list of supported picture sizes. This method will always 2482 * return a list with at least one element. 2483 */ 2484 public List<Size> getSupportedPictureSizes() { 2485 String str = get(KEY_PICTURE_SIZE + SUPPORTED_VALUES_SUFFIX); 2486 return splitSize(str); 2487 } 2488 2489 /** 2490 * Sets the image format for pictures. 2491 * 2492 * @param pixel_format the desired picture format 2493 * (<var>ImageFormat.NV21</var>, 2494 * <var>ImageFormat.RGB_565</var>, or 2495 * <var>ImageFormat.JPEG</var>) 2496 * @see android.graphics.ImageFormat 2497 */ 2498 public void setPictureFormat(int pixel_format) { 2499 String s = cameraFormatForPixelFormat(pixel_format); 2500 if (s == null) { 2501 throw new IllegalArgumentException( 2502 "Invalid pixel_format=" + pixel_format); 2503 } 2504 2505 set(KEY_PICTURE_FORMAT, s); 2506 } 2507 2508 /** 2509 * Returns the image format for pictures. 2510 * 2511 * @return the picture format 2512 * @see android.graphics.ImageFormat 2513 */ 2514 public int getPictureFormat() { 2515 return pixelFormatForCameraFormat(get(KEY_PICTURE_FORMAT)); 2516 } 2517 2518 /** 2519 * Gets the supported picture formats. 2520 * 2521 * @return supported picture formats. This method will always return a 2522 * list with at least one element. 2523 * @see android.graphics.ImageFormat 2524 */ 2525 public List<Integer> getSupportedPictureFormats() { 2526 String str = get(KEY_PICTURE_FORMAT + SUPPORTED_VALUES_SUFFIX); 2527 ArrayList<Integer> formats = new ArrayList<Integer>(); 2528 for (String s : split(str)) { 2529 int f = pixelFormatForCameraFormat(s); 2530 if (f == ImageFormat.UNKNOWN) continue; 2531 formats.add(f); 2532 } 2533 return formats; 2534 } 2535 2536 private String cameraFormatForPixelFormat(int pixel_format) { 2537 switch(pixel_format) { 2538 case ImageFormat.NV16: return PIXEL_FORMAT_YUV422SP; 2539 case ImageFormat.NV21: return PIXEL_FORMAT_YUV420SP; 2540 case ImageFormat.YUY2: return PIXEL_FORMAT_YUV422I; 2541 case ImageFormat.YV12: return PIXEL_FORMAT_YUV420P; 2542 case ImageFormat.RGB_565: return PIXEL_FORMAT_RGB565; 2543 case ImageFormat.JPEG: return PIXEL_FORMAT_JPEG; 2544 case ImageFormat.BAYER_RGGB: return PIXEL_FORMAT_BAYER_RGGB; 2545 default: return null; 2546 } 2547 } 2548 2549 private int pixelFormatForCameraFormat(String format) { 2550 if (format == null) 2551 return ImageFormat.UNKNOWN; 2552 2553 if (format.equals(PIXEL_FORMAT_YUV422SP)) 2554 return ImageFormat.NV16; 2555 2556 if (format.equals(PIXEL_FORMAT_YUV420SP)) 2557 return ImageFormat.NV21; 2558 2559 if (format.equals(PIXEL_FORMAT_YUV422I)) 2560 return ImageFormat.YUY2; 2561 2562 if (format.equals(PIXEL_FORMAT_YUV420P)) 2563 return ImageFormat.YV12; 2564 2565 if (format.equals(PIXEL_FORMAT_RGB565)) 2566 return ImageFormat.RGB_565; 2567 2568 if (format.equals(PIXEL_FORMAT_JPEG)) 2569 return ImageFormat.JPEG; 2570 2571 return ImageFormat.UNKNOWN; 2572 } 2573 2574 /** 2575 * Sets the clockwise rotation angle in degrees relative to the 2576 * orientation of the camera. This affects the pictures returned from 2577 * JPEG {@link PictureCallback}. The camera driver may set orientation 2578 * in the EXIF header without rotating the picture. Or the driver may 2579 * rotate the picture and the EXIF thumbnail. If the Jpeg picture is 2580 * rotated, the orientation in the EXIF header will be missing or 1 2581 * (row #0 is top and column #0 is left side). 2582 * 2583 * <p>If applications want to rotate the picture to match the orientation 2584 * of what users see, apps should use {@link 2585 * android.view.OrientationEventListener} and {@link CameraInfo}. 2586 * The value from OrientationEventListener is relative to the natural 2587 * orientation of the device. CameraInfo.orientation is the angle 2588 * between camera orientation and natural device orientation. The sum 2589 * of the two is the rotation angle for back-facing camera. The 2590 * difference of the two is the rotation angle for front-facing camera. 2591 * Note that the JPEG pictures of front-facing cameras are not mirrored 2592 * as in preview display. 2593 * 2594 * <p>For example, suppose the natural orientation of the device is 2595 * portrait. The device is rotated 270 degrees clockwise, so the device 2596 * orientation is 270. Suppose a back-facing camera sensor is mounted in 2597 * landscape and the top side of the camera sensor is aligned with the 2598 * right edge of the display in natural orientation. So the camera 2599 * orientation is 90. The rotation should be set to 0 (270 + 90). 2600 * 2601 * <p>The reference code is as follows. 2602 * 2603 * <pre> 2604 * public void onOrientationChanged(int orientation) { 2605 * if (orientation == ORIENTATION_UNKNOWN) return; 2606 * android.hardware.Camera.CameraInfo info = 2607 * new android.hardware.Camera.CameraInfo(); 2608 * android.hardware.Camera.getCameraInfo(cameraId, info); 2609 * orientation = (orientation + 45) / 90 * 90; 2610 * int rotation = 0; 2611 * if (info.facing == CameraInfo.CAMERA_FACING_FRONT) { 2612 * rotation = (info.orientation - orientation + 360) % 360; 2613 * } else { // back-facing camera 2614 * rotation = (info.orientation + orientation) % 360; 2615 * } 2616 * mParameters.setRotation(rotation); 2617 * } 2618 * </pre> 2619 * 2620 * @param rotation The rotation angle in degrees relative to the 2621 * orientation of the camera. Rotation can only be 0, 2622 * 90, 180 or 270. 2623 * @throws IllegalArgumentException if rotation value is invalid. 2624 * @see android.view.OrientationEventListener 2625 * @see #getCameraInfo(int, CameraInfo) 2626 */ 2627 public void setRotation(int rotation) { 2628 if (rotation == 0 || rotation == 90 || rotation == 180 2629 || rotation == 270) { 2630 set(KEY_ROTATION, Integer.toString(rotation)); 2631 } else { 2632 throw new IllegalArgumentException( 2633 "Invalid rotation=" + rotation); 2634 } 2635 } 2636 2637 /** 2638 * Sets GPS latitude coordinate. This will be stored in JPEG EXIF 2639 * header. 2640 * 2641 * @param latitude GPS latitude coordinate. 2642 */ 2643 public void setGpsLatitude(double latitude) { 2644 set(KEY_GPS_LATITUDE, Double.toString(latitude)); 2645 } 2646 2647 /** 2648 * Sets GPS longitude coordinate. This will be stored in JPEG EXIF 2649 * header. 2650 * 2651 * @param longitude GPS longitude coordinate. 2652 */ 2653 public void setGpsLongitude(double longitude) { 2654 set(KEY_GPS_LONGITUDE, Double.toString(longitude)); 2655 } 2656 2657 /** 2658 * Sets GPS altitude. This will be stored in JPEG EXIF header. 2659 * 2660 * @param altitude GPS altitude in meters. 2661 */ 2662 public void setGpsAltitude(double altitude) { 2663 set(KEY_GPS_ALTITUDE, Double.toString(altitude)); 2664 } 2665 2666 /** 2667 * Sets GPS timestamp. This will be stored in JPEG EXIF header. 2668 * 2669 * @param timestamp GPS timestamp (UTC in seconds since January 1, 2670 * 1970). 2671 */ 2672 public void setGpsTimestamp(long timestamp) { 2673 set(KEY_GPS_TIMESTAMP, Long.toString(timestamp)); 2674 } 2675 2676 /** 2677 * Sets GPS processing method. It will store up to 32 characters 2678 * in JPEG EXIF header. 2679 * 2680 * @param processing_method The processing method to get this location. 2681 */ 2682 public void setGpsProcessingMethod(String processing_method) { 2683 set(KEY_GPS_PROCESSING_METHOD, processing_method); 2684 } 2685 2686 /** 2687 * Removes GPS latitude, longitude, altitude, and timestamp from the 2688 * parameters. 2689 */ 2690 public void removeGpsData() { 2691 remove(KEY_GPS_LATITUDE); 2692 remove(KEY_GPS_LONGITUDE); 2693 remove(KEY_GPS_ALTITUDE); 2694 remove(KEY_GPS_TIMESTAMP); 2695 remove(KEY_GPS_PROCESSING_METHOD); 2696 } 2697 2698 /** 2699 * Gets the current white balance setting. 2700 * 2701 * @return current white balance. null if white balance setting is not 2702 * supported. 2703 * @see #WHITE_BALANCE_AUTO 2704 * @see #WHITE_BALANCE_INCANDESCENT 2705 * @see #WHITE_BALANCE_FLUORESCENT 2706 * @see #WHITE_BALANCE_WARM_FLUORESCENT 2707 * @see #WHITE_BALANCE_DAYLIGHT 2708 * @see #WHITE_BALANCE_CLOUDY_DAYLIGHT 2709 * @see #WHITE_BALANCE_TWILIGHT 2710 * @see #WHITE_BALANCE_SHADE 2711 * 2712 */ 2713 public String getWhiteBalance() { 2714 return get(KEY_WHITE_BALANCE); 2715 } 2716 2717 /** 2718 * Sets the white balance. Changing the setting will release the 2719 * auto-white balance lock. It is recommended not to change white 2720 * balance and AWB lock at the same time. 2721 * 2722 * @param value new white balance. 2723 * @see #getWhiteBalance() 2724 * @see #setAutoWhiteBalanceLock(boolean) 2725 */ 2726 public void setWhiteBalance(String value) { 2727 String oldValue = get(KEY_WHITE_BALANCE); 2728 if (same(value, oldValue)) return; 2729 set(KEY_WHITE_BALANCE, value); 2730 set(KEY_AUTO_WHITEBALANCE_LOCK, FALSE); 2731 } 2732 2733 /** 2734 * Gets the supported white balance. 2735 * 2736 * @return a list of supported white balance. null if white balance 2737 * setting is not supported. 2738 * @see #getWhiteBalance() 2739 */ 2740 public List<String> getSupportedWhiteBalance() { 2741 String str = get(KEY_WHITE_BALANCE + SUPPORTED_VALUES_SUFFIX); 2742 return split(str); 2743 } 2744 2745 /** 2746 * Gets the current color effect setting. 2747 * 2748 * @return current color effect. null if color effect 2749 * setting is not supported. 2750 * @see #EFFECT_NONE 2751 * @see #EFFECT_MONO 2752 * @see #EFFECT_NEGATIVE 2753 * @see #EFFECT_SOLARIZE 2754 * @see #EFFECT_SEPIA 2755 * @see #EFFECT_POSTERIZE 2756 * @see #EFFECT_WHITEBOARD 2757 * @see #EFFECT_BLACKBOARD 2758 * @see #EFFECT_AQUA 2759 */ 2760 public String getColorEffect() { 2761 return get(KEY_EFFECT); 2762 } 2763 2764 /** 2765 * Sets the current color effect setting. 2766 * 2767 * @param value new color effect. 2768 * @see #getColorEffect() 2769 */ 2770 public void setColorEffect(String value) { 2771 set(KEY_EFFECT, value); 2772 } 2773 2774 /** 2775 * Gets the supported color effects. 2776 * 2777 * @return a list of supported color effects. null if color effect 2778 * setting is not supported. 2779 * @see #getColorEffect() 2780 */ 2781 public List<String> getSupportedColorEffects() { 2782 String str = get(KEY_EFFECT + SUPPORTED_VALUES_SUFFIX); 2783 return split(str); 2784 } 2785 2786 2787 /** 2788 * Gets the current antibanding setting. 2789 * 2790 * @return current antibanding. null if antibanding setting is not 2791 * supported. 2792 * @see #ANTIBANDING_AUTO 2793 * @see #ANTIBANDING_50HZ 2794 * @see #ANTIBANDING_60HZ 2795 * @see #ANTIBANDING_OFF 2796 */ 2797 public String getAntibanding() { 2798 return get(KEY_ANTIBANDING); 2799 } 2800 2801 /** 2802 * Sets the antibanding. 2803 * 2804 * @param antibanding new antibanding value. 2805 * @see #getAntibanding() 2806 */ 2807 public void setAntibanding(String antibanding) { 2808 set(KEY_ANTIBANDING, antibanding); 2809 } 2810 2811 /** 2812 * Gets the supported antibanding values. 2813 * 2814 * @return a list of supported antibanding values. null if antibanding 2815 * setting is not supported. 2816 * @see #getAntibanding() 2817 */ 2818 public List<String> getSupportedAntibanding() { 2819 String str = get(KEY_ANTIBANDING + SUPPORTED_VALUES_SUFFIX); 2820 return split(str); 2821 } 2822 2823 /** 2824 * Gets the current scene mode setting. 2825 * 2826 * @return one of SCENE_MODE_XXX string constant. null if scene mode 2827 * setting is not supported. 2828 * @see #SCENE_MODE_AUTO 2829 * @see #SCENE_MODE_ACTION 2830 * @see #SCENE_MODE_PORTRAIT 2831 * @see #SCENE_MODE_LANDSCAPE 2832 * @see #SCENE_MODE_NIGHT 2833 * @see #SCENE_MODE_NIGHT_PORTRAIT 2834 * @see #SCENE_MODE_THEATRE 2835 * @see #SCENE_MODE_BEACH 2836 * @see #SCENE_MODE_SNOW 2837 * @see #SCENE_MODE_SUNSET 2838 * @see #SCENE_MODE_STEADYPHOTO 2839 * @see #SCENE_MODE_FIREWORKS 2840 * @see #SCENE_MODE_SPORTS 2841 * @see #SCENE_MODE_PARTY 2842 * @see #SCENE_MODE_CANDLELIGHT 2843 * @see #SCENE_MODE_BARCODE 2844 */ 2845 public String getSceneMode() { 2846 return get(KEY_SCENE_MODE); 2847 } 2848 2849 /** 2850 * Sets the scene mode. Changing scene mode may override other 2851 * parameters (such as flash mode, focus mode, white balance). For 2852 * example, suppose originally flash mode is on and supported flash 2853 * modes are on/off. In night scene mode, both flash mode and supported 2854 * flash mode may be changed to off. After setting scene mode, 2855 * applications should call getParameters to know if some parameters are 2856 * changed. 2857 * 2858 * @param value scene mode. 2859 * @see #getSceneMode() 2860 */ 2861 public void setSceneMode(String value) { 2862 set(KEY_SCENE_MODE, value); 2863 } 2864 2865 /** 2866 * Gets the supported scene modes. 2867 * 2868 * @return a list of supported scene modes. null if scene mode setting 2869 * is not supported. 2870 * @see #getSceneMode() 2871 */ 2872 public List<String> getSupportedSceneModes() { 2873 String str = get(KEY_SCENE_MODE + SUPPORTED_VALUES_SUFFIX); 2874 return split(str); 2875 } 2876 2877 /** 2878 * Gets the current flash mode setting. 2879 * 2880 * @return current flash mode. null if flash mode setting is not 2881 * supported. 2882 * @see #FLASH_MODE_OFF 2883 * @see #FLASH_MODE_AUTO 2884 * @see #FLASH_MODE_ON 2885 * @see #FLASH_MODE_RED_EYE 2886 * @see #FLASH_MODE_TORCH 2887 */ 2888 public String getFlashMode() { 2889 return get(KEY_FLASH_MODE); 2890 } 2891 2892 /** 2893 * Sets the flash mode. 2894 * 2895 * @param value flash mode. 2896 * @see #getFlashMode() 2897 */ 2898 public void setFlashMode(String value) { 2899 set(KEY_FLASH_MODE, value); 2900 } 2901 2902 /** 2903 * Gets the supported flash modes. 2904 * 2905 * @return a list of supported flash modes. null if flash mode setting 2906 * is not supported. 2907 * @see #getFlashMode() 2908 */ 2909 public List<String> getSupportedFlashModes() { 2910 String str = get(KEY_FLASH_MODE + SUPPORTED_VALUES_SUFFIX); 2911 return split(str); 2912 } 2913 2914 /** 2915 * Gets the current focus mode setting. 2916 * 2917 * @return current focus mode. This method will always return a non-null 2918 * value. Applications should call {@link 2919 * #autoFocus(AutoFocusCallback)} to start the focus if focus 2920 * mode is FOCUS_MODE_AUTO or FOCUS_MODE_MACRO. 2921 * @see #FOCUS_MODE_AUTO 2922 * @see #FOCUS_MODE_INFINITY 2923 * @see #FOCUS_MODE_MACRO 2924 * @see #FOCUS_MODE_FIXED 2925 * @see #FOCUS_MODE_EDOF 2926 * @see #FOCUS_MODE_CONTINUOUS_VIDEO 2927 */ 2928 public String getFocusMode() { 2929 return get(KEY_FOCUS_MODE); 2930 } 2931 2932 /** 2933 * Sets the focus mode. 2934 * 2935 * @param value focus mode. 2936 * @see #getFocusMode() 2937 */ 2938 public void setFocusMode(String value) { 2939 set(KEY_FOCUS_MODE, value); 2940 } 2941 2942 /** 2943 * Gets the supported focus modes. 2944 * 2945 * @return a list of supported focus modes. This method will always 2946 * return a list with at least one element. 2947 * @see #getFocusMode() 2948 */ 2949 public List<String> getSupportedFocusModes() { 2950 String str = get(KEY_FOCUS_MODE + SUPPORTED_VALUES_SUFFIX); 2951 return split(str); 2952 } 2953 2954 /** 2955 * Gets the focal length (in millimeter) of the camera. 2956 * 2957 * @return the focal length. This method will always return a valid 2958 * value. 2959 */ 2960 public float getFocalLength() { 2961 return Float.parseFloat(get(KEY_FOCAL_LENGTH)); 2962 } 2963 2964 /** 2965 * Gets the horizontal angle of view in degrees. 2966 * 2967 * @return horizontal angle of view. This method will always return a 2968 * valid value. 2969 */ 2970 public float getHorizontalViewAngle() { 2971 return Float.parseFloat(get(KEY_HORIZONTAL_VIEW_ANGLE)); 2972 } 2973 2974 /** 2975 * Gets the vertical angle of view in degrees. 2976 * 2977 * @return vertical angle of view. This method will always return a 2978 * valid value. 2979 */ 2980 public float getVerticalViewAngle() { 2981 return Float.parseFloat(get(KEY_VERTICAL_VIEW_ANGLE)); 2982 } 2983 2984 /** 2985 * Gets the current exposure compensation index. 2986 * 2987 * @return current exposure compensation index. The range is {@link 2988 * #getMinExposureCompensation} to {@link 2989 * #getMaxExposureCompensation}. 0 means exposure is not 2990 * adjusted. 2991 */ 2992 public int getExposureCompensation() { 2993 return getInt(KEY_EXPOSURE_COMPENSATION, 0); 2994 } 2995 2996 /** 2997 * Sets the exposure compensation index. 2998 * 2999 * @param value exposure compensation index. The valid value range is 3000 * from {@link #getMinExposureCompensation} (inclusive) to {@link 3001 * #getMaxExposureCompensation} (inclusive). 0 means exposure is 3002 * not adjusted. Application should call 3003 * getMinExposureCompensation and getMaxExposureCompensation to 3004 * know if exposure compensation is supported. 3005 */ 3006 public void setExposureCompensation(int value) { 3007 set(KEY_EXPOSURE_COMPENSATION, value); 3008 } 3009 3010 /** 3011 * Gets the maximum exposure compensation index. 3012 * 3013 * @return maximum exposure compensation index (>=0). If both this 3014 * method and {@link #getMinExposureCompensation} return 0, 3015 * exposure compensation is not supported. 3016 */ 3017 public int getMaxExposureCompensation() { 3018 return getInt(KEY_MAX_EXPOSURE_COMPENSATION, 0); 3019 } 3020 3021 /** 3022 * Gets the minimum exposure compensation index. 3023 * 3024 * @return minimum exposure compensation index (<=0). If both this 3025 * method and {@link #getMaxExposureCompensation} return 0, 3026 * exposure compensation is not supported. 3027 */ 3028 public int getMinExposureCompensation() { 3029 return getInt(KEY_MIN_EXPOSURE_COMPENSATION, 0); 3030 } 3031 3032 /** 3033 * Gets the exposure compensation step. 3034 * 3035 * @return exposure compensation step. Applications can get EV by 3036 * multiplying the exposure compensation index and step. Ex: if 3037 * exposure compensation index is -6 and step is 0.333333333, EV 3038 * is -2. 3039 */ 3040 public float getExposureCompensationStep() { 3041 return getFloat(KEY_EXPOSURE_COMPENSATION_STEP, 0); 3042 } 3043 3044 /** 3045 * <p>Sets the auto-exposure lock state. Applications should check 3046 * {@link #isAutoExposureLockSupported} before using this method.</p> 3047 * 3048 * <p>If set to true, the camera auto-exposure routine will immediately 3049 * pause until the lock is set to false. Exposure compensation settings 3050 * changes will still take effect while auto-exposure is locked.</p> 3051 * 3052 * <p>If auto-exposure is already locked, setting this to true again has 3053 * no effect (the driver will not recalculate exposure values).</p> 3054 * 3055 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 3056 * image capture with {@link #takePicture(Camera.ShutterCallback, 3057 * Camera.PictureCallback, Camera.PictureCallback)}, will not change the 3058 * lock.</p> 3059 * 3060 * <p>Exposure compensation, auto-exposure lock, and auto-white balance 3061 * lock can be used to capture an exposure-bracketed burst of images, 3062 * for example.</p> 3063 * 3064 * <p>Auto-exposure state, including the lock state, will not be 3065 * maintained after camera {@link #release()} is called. Locking 3066 * auto-exposure after {@link #open()} but before the first call to 3067 * {@link #startPreview()} will not allow the auto-exposure routine to 3068 * run at all, and may result in severely over- or under-exposed 3069 * images.</p> 3070 * 3071 * @param toggle new state of the auto-exposure lock. True means that 3072 * auto-exposure is locked, false means that the auto-exposure 3073 * routine is free to run normally. 3074 * 3075 * @see #getAutoExposureLock() 3076 */ 3077 public void setAutoExposureLock(boolean toggle) { 3078 set(KEY_AUTO_EXPOSURE_LOCK, toggle ? TRUE : FALSE); 3079 } 3080 3081 /** 3082 * Gets the state of the auto-exposure lock. Applications should check 3083 * {@link #isAutoExposureLockSupported} before using this method. See 3084 * {@link #setAutoExposureLock} for details about the lock. 3085 * 3086 * @return State of the auto-exposure lock. Returns true if 3087 * auto-exposure is currently locked, and false otherwise. 3088 * 3089 * @see #setAutoExposureLock(boolean) 3090 * 3091 */ 3092 public boolean getAutoExposureLock() { 3093 String str = get(KEY_AUTO_EXPOSURE_LOCK); 3094 return TRUE.equals(str); 3095 } 3096 3097 /** 3098 * Returns true if auto-exposure locking is supported. Applications 3099 * should call this before trying to lock auto-exposure. See 3100 * {@link #setAutoExposureLock} for details about the lock. 3101 * 3102 * @return true if auto-exposure lock is supported. 3103 * @see #setAutoExposureLock(boolean) 3104 * 3105 */ 3106 public boolean isAutoExposureLockSupported() { 3107 String str = get(KEY_AUTO_EXPOSURE_LOCK_SUPPORTED); 3108 return TRUE.equals(str); 3109 } 3110 3111 /** 3112 * <p>Sets the auto-white balance lock state. Applications should check 3113 * {@link #isAutoWhiteBalanceLockSupported} before using this 3114 * method.</p> 3115 * 3116 * <p>If set to true, the camera auto-white balance routine will 3117 * immediately pause until the lock is set to false.</p> 3118 * 3119 * <p>If auto-white balance is already locked, setting this to true 3120 * again has no effect (the driver will not recalculate white balance 3121 * values).</p> 3122 * 3123 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 3124 * image capture with {@link #takePicture(Camera.ShutterCallback, 3125 * Camera.PictureCallback, Camera.PictureCallback)}, will not change the 3126 * the lock.</p> 3127 * 3128 * <p> Changing the white balance mode with {@link #setWhiteBalance} 3129 * will release the auto-white balance lock if it is set.</p> 3130 * 3131 * <p>Exposure compensation, AE lock, and AWB lock can be used to 3132 * capture an exposure-bracketed burst of images, for example. 3133 * Auto-white balance state, including the lock state, will not be 3134 * maintained after camera {@link #release()} is called. Locking 3135 * auto-white balance after {@link #open()} but before the first call to 3136 * {@link #startPreview()} will not allow the auto-white balance routine 3137 * to run at all, and may result in severely incorrect color in captured 3138 * images.</p> 3139 * 3140 * @param toggle new state of the auto-white balance lock. True means 3141 * that auto-white balance is locked, false means that the 3142 * auto-white balance routine is free to run normally. 3143 * 3144 * @see #getAutoWhiteBalanceLock() 3145 * @see #setWhiteBalance(String) 3146 */ 3147 public void setAutoWhiteBalanceLock(boolean toggle) { 3148 set(KEY_AUTO_WHITEBALANCE_LOCK, toggle ? TRUE : FALSE); 3149 } 3150 3151 /** 3152 * Gets the state of the auto-white balance lock. Applications should 3153 * check {@link #isAutoWhiteBalanceLockSupported} before using this 3154 * method. See {@link #setAutoWhiteBalanceLock} for details about the 3155 * lock. 3156 * 3157 * @return State of the auto-white balance lock. Returns true if 3158 * auto-white balance is currently locked, and false 3159 * otherwise. 3160 * 3161 * @see #setAutoWhiteBalanceLock(boolean) 3162 * 3163 */ 3164 public boolean getAutoWhiteBalanceLock() { 3165 String str = get(KEY_AUTO_WHITEBALANCE_LOCK); 3166 return TRUE.equals(str); 3167 } 3168 3169 /** 3170 * Returns true if auto-white balance locking is supported. Applications 3171 * should call this before trying to lock auto-white balance. See 3172 * {@link #setAutoWhiteBalanceLock} for details about the lock. 3173 * 3174 * @return true if auto-white balance lock is supported. 3175 * @see #setAutoWhiteBalanceLock(boolean) 3176 * 3177 */ 3178 public boolean isAutoWhiteBalanceLockSupported() { 3179 String str = get(KEY_AUTO_WHITEBALANCE_LOCK_SUPPORTED); 3180 return TRUE.equals(str); 3181 } 3182 3183 /** 3184 * Gets current zoom value. This also works when smooth zoom is in 3185 * progress. Applications should check {@link #isZoomSupported} before 3186 * using this method. 3187 * 3188 * @return the current zoom value. The range is 0 to {@link 3189 * #getMaxZoom}. 0 means the camera is not zoomed. 3190 */ 3191 public int getZoom() { 3192 return getInt(KEY_ZOOM, 0); 3193 } 3194 3195 /** 3196 * Sets current zoom value. If the camera is zoomed (value > 0), the 3197 * actual picture size may be smaller than picture size setting. 3198 * Applications can check the actual picture size after picture is 3199 * returned from {@link PictureCallback}. The preview size remains the 3200 * same in zoom. Applications should check {@link #isZoomSupported} 3201 * before using this method. 3202 * 3203 * @param value zoom value. The valid range is 0 to {@link #getMaxZoom}. 3204 */ 3205 public void setZoom(int value) { 3206 set(KEY_ZOOM, value); 3207 } 3208 3209 /** 3210 * Returns true if zoom is supported. Applications should call this 3211 * before using other zoom methods. 3212 * 3213 * @return true if zoom is supported. 3214 */ 3215 public boolean isZoomSupported() { 3216 String str = get(KEY_ZOOM_SUPPORTED); 3217 return TRUE.equals(str); 3218 } 3219 3220 /** 3221 * Gets the maximum zoom value allowed for snapshot. This is the maximum 3222 * value that applications can set to {@link #setZoom(int)}. 3223 * Applications should call {@link #isZoomSupported} before using this 3224 * method. This value may change in different preview size. Applications 3225 * should call this again after setting preview size. 3226 * 3227 * @return the maximum zoom value supported by the camera. 3228 */ 3229 public int getMaxZoom() { 3230 return getInt(KEY_MAX_ZOOM, 0); 3231 } 3232 3233 /** 3234 * Gets the zoom ratios of all zoom values. Applications should check 3235 * {@link #isZoomSupported} before using this method. 3236 * 3237 * @return the zoom ratios in 1/100 increments. Ex: a zoom of 3.2x is 3238 * returned as 320. The number of elements is {@link 3239 * #getMaxZoom} + 1. The list is sorted from small to large. The 3240 * first element is always 100. The last element is the zoom 3241 * ratio of the maximum zoom value. 3242 */ 3243 public List<Integer> getZoomRatios() { 3244 return splitInt(get(KEY_ZOOM_RATIOS)); 3245 } 3246 3247 /** 3248 * Returns true if smooth zoom is supported. Applications should call 3249 * this before using other smooth zoom methods. 3250 * 3251 * @return true if smooth zoom is supported. 3252 */ 3253 public boolean isSmoothZoomSupported() { 3254 String str = get(KEY_SMOOTH_ZOOM_SUPPORTED); 3255 return TRUE.equals(str); 3256 } 3257 3258 /** 3259 * <p>Gets the distances from the camera to where an object appears to be 3260 * in focus. The object is sharpest at the optimal focus distance. The 3261 * depth of field is the far focus distance minus near focus distance.</p> 3262 * 3263 * <p>Focus distances may change after calling {@link 3264 * #autoFocus(AutoFocusCallback)}, {@link #cancelAutoFocus}, or {@link 3265 * #startPreview()}. Applications can call {@link #getParameters()} 3266 * and this method anytime to get the latest focus distances. If the 3267 * focus mode is FOCUS_MODE_CONTINUOUS_VIDEO, focus distances may change 3268 * from time to time.</p> 3269 * 3270 * <p>This method is intended to estimate the distance between the camera 3271 * and the subject. After autofocus, the subject distance may be within 3272 * near and far focus distance. However, the precision depends on the 3273 * camera hardware, autofocus algorithm, the focus area, and the scene. 3274 * The error can be large and it should be only used as a reference.</p> 3275 * 3276 * <p>Far focus distance >= optimal focus distance >= near focus distance. 3277 * If the focus distance is infinity, the value will be 3278 * {@code Float.POSITIVE_INFINITY}.</p> 3279 * 3280 * @param output focus distances in meters. output must be a float 3281 * array with three elements. Near focus distance, optimal focus 3282 * distance, and far focus distance will be filled in the array. 3283 * @see #FOCUS_DISTANCE_NEAR_INDEX 3284 * @see #FOCUS_DISTANCE_OPTIMAL_INDEX 3285 * @see #FOCUS_DISTANCE_FAR_INDEX 3286 */ 3287 public void getFocusDistances(float[] output) { 3288 if (output == null || output.length != 3) { 3289 throw new IllegalArgumentException( 3290 "output must be a float array with three elements."); 3291 } 3292 splitFloat(get(KEY_FOCUS_DISTANCES), output); 3293 } 3294 3295 /** 3296 * Gets the maximum number of focus areas supported. This is the maximum 3297 * length of the list in {@link #setFocusAreas(List)} and 3298 * {@link #getFocusAreas()}. 3299 * 3300 * @return the maximum number of focus areas supported by the camera. 3301 * @see #getFocusAreas() 3302 */ 3303 public int getMaxNumFocusAreas() { 3304 return getInt(KEY_MAX_NUM_FOCUS_AREAS, 0); 3305 } 3306 3307 /** 3308 * <p>Gets the current focus areas. Camera driver uses the areas to decide 3309 * focus.</p> 3310 * 3311 * <p>Before using this API or {@link #setFocusAreas(List)}, apps should 3312 * call {@link #getMaxNumFocusAreas()} to know the maximum number of 3313 * focus areas first. If the value is 0, focus area is not supported.</p> 3314 * 3315 * <p>Each focus area is a rectangle with specified weight. The direction 3316 * is relative to the sensor orientation, that is, what the sensor sees. 3317 * The direction is not affected by the rotation or mirroring of 3318 * {@link #setDisplayOrientation(int)}. Coordinates of the rectangle 3319 * range from -1000 to 1000. (-1000, -1000) is the upper left point. 3320 * (1000, 1000) is the lower right point. The width and height of focus 3321 * areas cannot be 0 or negative.</p> 3322 * 3323 * <p>The weight must range from 1 to 1000. The weight should be 3324 * interpreted as a per-pixel weight - all pixels in the area have the 3325 * specified weight. This means a small area with the same weight as a 3326 * larger area will have less influence on the focusing than the larger 3327 * area. Focus areas can partially overlap and the driver will add the 3328 * weights in the overlap region.</p> 3329 * 3330 * <p>A special case of a {@code null} focus area list means the driver is 3331 * free to select focus targets as it wants. For example, the driver may 3332 * use more signals to select focus areas and change them 3333 * dynamically. Apps can set the focus area list to {@code null} if they 3334 * want the driver to completely control focusing.</p> 3335 * 3336 * <p>Focus areas are relative to the current field of view 3337 * ({@link #getZoom()}). No matter what the zoom level is, (-1000,-1000) 3338 * represents the top of the currently visible camera frame. The focus 3339 * area cannot be set to be outside the current field of view, even 3340 * when using zoom.</p> 3341 * 3342 * <p>Focus area only has effect if the current focus mode is 3343 * {@link #FOCUS_MODE_AUTO}, {@link #FOCUS_MODE_MACRO}, 3344 * {@link #FOCUS_MODE_CONTINUOUS_VIDEO}, or 3345 * {@link #FOCUS_MODE_CONTINUOUS_PICTURE}.</p> 3346 * 3347 * @return a list of current focus areas 3348 */ 3349 public List<Area> getFocusAreas() { 3350 return splitArea(get(KEY_FOCUS_AREAS)); 3351 } 3352 3353 /** 3354 * Sets focus areas. See {@link #getFocusAreas()} for documentation. 3355 * 3356 * @param focusAreas the focus areas 3357 * @see #getFocusAreas() 3358 */ 3359 public void setFocusAreas(List<Area> focusAreas) { 3360 set(KEY_FOCUS_AREAS, focusAreas); 3361 } 3362 3363 /** 3364 * Gets the maximum number of metering areas supported. This is the 3365 * maximum length of the list in {@link #setMeteringAreas(List)} and 3366 * {@link #getMeteringAreas()}. 3367 * 3368 * @return the maximum number of metering areas supported by the camera. 3369 * @see #getMeteringAreas() 3370 */ 3371 public int getMaxNumMeteringAreas() { 3372 return getInt(KEY_MAX_NUM_METERING_AREAS, 0); 3373 } 3374 3375 /** 3376 * <p>Gets the current metering areas. Camera driver uses these areas to 3377 * decide exposure.</p> 3378 * 3379 * <p>Before using this API or {@link #setMeteringAreas(List)}, apps should 3380 * call {@link #getMaxNumMeteringAreas()} to know the maximum number of 3381 * metering areas first. If the value is 0, metering area is not 3382 * supported.</p> 3383 * 3384 * <p>Each metering area is a rectangle with specified weight. The 3385 * direction is relative to the sensor orientation, that is, what the 3386 * sensor sees. The direction is not affected by the rotation or 3387 * mirroring of {@link #setDisplayOrientation(int)}. Coordinates of the 3388 * rectangle range from -1000 to 1000. (-1000, -1000) is the upper left 3389 * point. (1000, 1000) is the lower right point. The width and height of 3390 * metering areas cannot be 0 or negative.</p> 3391 * 3392 * <p>The weight must range from 1 to 1000, and represents a weight for 3393 * every pixel in the area. This means that a large metering area with 3394 * the same weight as a smaller area will have more effect in the 3395 * metering result. Metering areas can partially overlap and the driver 3396 * will add the weights in the overlap region.</p> 3397 * 3398 * <p>A special case of a {@code null} metering area list means the driver 3399 * is free to meter as it chooses. For example, the driver may use more 3400 * signals to select metering areas and change them dynamically. Apps 3401 * can set the metering area list to {@code null} if they want the 3402 * driver to completely control metering.</p> 3403 * 3404 * <p>Metering areas are relative to the current field of view 3405 * ({@link #getZoom()}). No matter what the zoom level is, (-1000,-1000) 3406 * represents the top of the currently visible camera frame. The 3407 * metering area cannot be set to be outside the current field of view, 3408 * even when using zoom.</p> 3409 * 3410 * <p>No matter what metering areas are, the final exposure are compensated 3411 * by {@link #setExposureCompensation(int)}.</p> 3412 * 3413 * @return a list of current metering areas 3414 */ 3415 public List<Area> getMeteringAreas() { 3416 return splitArea(get(KEY_METERING_AREAS)); 3417 } 3418 3419 /** 3420 * Sets metering areas. See {@link #getMeteringAreas()} for 3421 * documentation. 3422 * 3423 * @param meteringAreas the metering areas 3424 * @see #getMeteringAreas() 3425 */ 3426 public void setMeteringAreas(List<Area> meteringAreas) { 3427 set(KEY_METERING_AREAS, meteringAreas); 3428 } 3429 3430 /** 3431 * Gets the maximum number of detected faces supported. This is the 3432 * maximum length of the list returned from {@link FaceDetectionListener}. 3433 * If the return value is 0, face detection of the specified type is not 3434 * supported. 3435 * 3436 * @return the maximum number of detected face supported by the camera. 3437 * @see #startFaceDetection() 3438 */ 3439 public int getMaxNumDetectedFaces() { 3440 return getInt(KEY_MAX_NUM_DETECTED_FACES_HW, 0); 3441 } 3442 3443 /** 3444 * Sets recording mode hint. This tells the camera that the intent of 3445 * the application is to record videos {@link 3446 * android.media.MediaRecorder#start()}, not to take still pictures 3447 * {@link #takePicture(Camera.ShutterCallback, Camera.PictureCallback, 3448 * Camera.PictureCallback, Camera.PictureCallback)}. Using this hint can 3449 * allow MediaRecorder.start() to start faster or with fewer glitches on 3450 * output. This should be called before starting preview for the best 3451 * result, but can be changed while the preview is active. The default 3452 * value is false. 3453 * 3454 * The app can still call takePicture() when the hint is true or call 3455 * MediaRecorder.start() when the hint is false. But the performance may 3456 * be worse. 3457 * 3458 * @param hint true if the apps intend to record videos using 3459 * {@link android.media.MediaRecorder}. 3460 */ 3461 public void setRecordingHint(boolean hint) { 3462 set(KEY_RECORDING_HINT, hint ? TRUE : FALSE); 3463 } 3464 3465 /** 3466 * Returns true if video snapshot is supported. That is, applications 3467 * can call {@link #takePicture(Camera.ShutterCallback, 3468 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)} 3469 * during recording. Applications do not need to call {@link 3470 * #startPreview()} after taking a picture. The preview will be still 3471 * active. Other than that, taking a picture during recording is 3472 * identical to taking a picture normally. All settings and methods 3473 * related to takePicture work identically. Ex: {@link 3474 * #getPictureSize()}, {@link #getSupportedPictureSizes()}, {@link 3475 * #setJpegQuality(int)}, {@link #setRotation(int)}, and etc. The 3476 * picture will have an EXIF header. {@link #FLASH_MODE_AUTO} and {@link 3477 * #FLASH_MODE_ON} also still work, but the video will record the flash. 3478 * 3479 * Applications can set shutter callback as null to avoid the shutter 3480 * sound. It is also recommended to set raw picture and post view 3481 * callbacks to null to avoid the interrupt of preview display. 3482 * 3483 * Field-of-view of the recorded video may be different from that of the 3484 * captured pictures. 3485 * 3486 * @return true if video snapshot is supported. 3487 */ 3488 public boolean isVideoSnapshotSupported() { 3489 String str = get(KEY_VIDEO_SNAPSHOT_SUPPORTED); 3490 return TRUE.equals(str); 3491 } 3492 3493 /** 3494 * <p>Enables and disables video stabilization. Use 3495 * {@link #isVideoStabilizationSupported} to determine if calling this 3496 * method is valid.</p> 3497 * 3498 * <p>Video stabilization reduces the shaking due to the motion of the 3499 * camera in both the preview stream and in recorded videos, including 3500 * data received from the preview callback. It does not reduce motion 3501 * blur in images captured with 3502 * {@link Camera#takePicture takePicture}.</p> 3503 * 3504 * <p>Video stabilization can be enabled and disabled while preview or 3505 * recording is active, but toggling it may cause a jump in the video 3506 * stream that may be undesirable in a recorded video.</p> 3507 * 3508 * @param toggle Set to true to enable video stabilization, and false to 3509 * disable video stabilization. 3510 * @see #isVideoStabilizationSupported() 3511 * @see #getVideoStabilization() 3512 */ 3513 public void setVideoStabilization(boolean toggle) { 3514 set(KEY_VIDEO_STABILIZATION, toggle ? TRUE : FALSE); 3515 } 3516 3517 /** 3518 * Get the current state of video stabilization. See 3519 * {@link #setVideoStabilization} for details of video stabilization. 3520 * 3521 * @return true if video stabilization is enabled 3522 * @see #isVideoStabilizationSupported() 3523 * @see #setVideoStabilization(boolean) 3524 */ 3525 public boolean getVideoStabilization() { 3526 String str = get(KEY_VIDEO_STABILIZATION); 3527 return TRUE.equals(str); 3528 } 3529 3530 /** 3531 * Returns true if video stabilization is supported. See 3532 * {@link #setVideoStabilization} for details of video stabilization. 3533 * 3534 * @return true if video stabilization is supported 3535 * @see #setVideoStabilization(boolean) 3536 * @see #getVideoStabilization() 3537 */ 3538 public boolean isVideoStabilizationSupported() { 3539 String str = get(KEY_VIDEO_STABILIZATION_SUPPORTED); 3540 return TRUE.equals(str); 3541 } 3542 3543 // Splits a comma delimited string to an ArrayList of String. 3544 // Return null if the passing string is null or the size is 0. 3545 private ArrayList<String> split(String str) { 3546 if (str == null) return null; 3547 3548 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 3549 splitter.setString(str); 3550 ArrayList<String> substrings = new ArrayList<String>(); 3551 for (String s : splitter) { 3552 substrings.add(s); 3553 } 3554 return substrings; 3555 } 3556 3557 // Splits a comma delimited string to an ArrayList of Integer. 3558 // Return null if the passing string is null or the size is 0. 3559 private ArrayList<Integer> splitInt(String str) { 3560 if (str == null) return null; 3561 3562 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 3563 splitter.setString(str); 3564 ArrayList<Integer> substrings = new ArrayList<Integer>(); 3565 for (String s : splitter) { 3566 substrings.add(Integer.parseInt(s)); 3567 } 3568 if (substrings.size() == 0) return null; 3569 return substrings; 3570 } 3571 3572 private void splitInt(String str, int[] output) { 3573 if (str == null) return; 3574 3575 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 3576 splitter.setString(str); 3577 int index = 0; 3578 for (String s : splitter) { 3579 output[index++] = Integer.parseInt(s); 3580 } 3581 } 3582 3583 // Splits a comma delimited string to an ArrayList of Float. 3584 private void splitFloat(String str, float[] output) { 3585 if (str == null) return; 3586 3587 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 3588 splitter.setString(str); 3589 int index = 0; 3590 for (String s : splitter) { 3591 output[index++] = Float.parseFloat(s); 3592 } 3593 } 3594 3595 // Returns the value of a float parameter. 3596 private float getFloat(String key, float defaultValue) { 3597 try { 3598 return Float.parseFloat(mMap.get(key)); 3599 } catch (NumberFormatException ex) { 3600 return defaultValue; 3601 } 3602 } 3603 3604 // Returns the value of a integer parameter. 3605 private int getInt(String key, int defaultValue) { 3606 try { 3607 return Integer.parseInt(mMap.get(key)); 3608 } catch (NumberFormatException ex) { 3609 return defaultValue; 3610 } 3611 } 3612 3613 // Splits a comma delimited string to an ArrayList of Size. 3614 // Return null if the passing string is null or the size is 0. 3615 private ArrayList<Size> splitSize(String str) { 3616 if (str == null) return null; 3617 3618 TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(','); 3619 splitter.setString(str); 3620 ArrayList<Size> sizeList = new ArrayList<Size>(); 3621 for (String s : splitter) { 3622 Size size = strToSize(s); 3623 if (size != null) sizeList.add(size); 3624 } 3625 if (sizeList.size() == 0) return null; 3626 return sizeList; 3627 } 3628 3629 // Parses a string (ex: "480x320") to Size object. 3630 // Return null if the passing string is null. 3631 private Size strToSize(String str) { 3632 if (str == null) return null; 3633 3634 int pos = str.indexOf('x'); 3635 if (pos != -1) { 3636 String width = str.substring(0, pos); 3637 String height = str.substring(pos + 1); 3638 return new Size(Integer.parseInt(width), 3639 Integer.parseInt(height)); 3640 } 3641 Log.e(TAG, "Invalid size parameter string=" + str); 3642 return null; 3643 } 3644 3645 // Splits a comma delimited string to an ArrayList of int array. 3646 // Example string: "(10000,26623),(10000,30000)". Return null if the 3647 // passing string is null or the size is 0. 3648 private ArrayList<int[]> splitRange(String str) { 3649 if (str == null || str.charAt(0) != '(' 3650 || str.charAt(str.length() - 1) != ')') { 3651 Log.e(TAG, "Invalid range list string=" + str); 3652 return null; 3653 } 3654 3655 ArrayList<int[]> rangeList = new ArrayList<int[]>(); 3656 int endIndex, fromIndex = 1; 3657 do { 3658 int[] range = new int[2]; 3659 endIndex = str.indexOf("),(", fromIndex); 3660 if (endIndex == -1) endIndex = str.length() - 1; 3661 splitInt(str.substring(fromIndex, endIndex), range); 3662 rangeList.add(range); 3663 fromIndex = endIndex + 3; 3664 } while (endIndex != str.length() - 1); 3665 3666 if (rangeList.size() == 0) return null; 3667 return rangeList; 3668 } 3669 3670 // Splits a comma delimited string to an ArrayList of Area objects. 3671 // Example string: "(-10,-10,0,0,300),(0,0,10,10,700)". Return null if 3672 // the passing string is null or the size is 0 or (0,0,0,0,0). 3673 private ArrayList<Area> splitArea(String str) { 3674 if (str == null || str.charAt(0) != '(' 3675 || str.charAt(str.length() - 1) != ')') { 3676 Log.e(TAG, "Invalid area string=" + str); 3677 return null; 3678 } 3679 3680 ArrayList<Area> result = new ArrayList<Area>(); 3681 int endIndex, fromIndex = 1; 3682 int[] array = new int[5]; 3683 do { 3684 endIndex = str.indexOf("),(", fromIndex); 3685 if (endIndex == -1) endIndex = str.length() - 1; 3686 splitInt(str.substring(fromIndex, endIndex), array); 3687 Rect rect = new Rect(array[0], array[1], array[2], array[3]); 3688 result.add(new Area(rect, array[4])); 3689 fromIndex = endIndex + 3; 3690 } while (endIndex != str.length() - 1); 3691 3692 if (result.size() == 0) return null; 3693 3694 if (result.size() == 1) { 3695 Area area = result.get(0); 3696 Rect rect = area.rect; 3697 if (rect.left == 0 && rect.top == 0 && rect.right == 0 3698 && rect.bottom == 0 && area.weight == 0) { 3699 return null; 3700 } 3701 } 3702 3703 return result; 3704 } 3705 3706 private boolean same(String s1, String s2) { 3707 if (s1 == null && s2 == null) return true; 3708 if (s1 != null && s1.equals(s2)) return true; 3709 return false; 3710 } 3711 }; 3712} 3713