Camera.java revision 83d3352cf7a67efd60732c0d40e5928f642f6808
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.graphics.ImageFormat; 20import android.graphics.Rect; 21import android.graphics.SurfaceTexture; 22import android.os.Handler; 23import android.os.Looper; 24import android.os.Message; 25import android.util.Log; 26import android.view.Surface; 27import android.view.SurfaceHolder; 28 29import java.io.IOException; 30import java.lang.ref.WeakReference; 31import java.util.ArrayList; 32import java.util.HashMap; 33import java.util.List; 34import java.util.StringTokenizer; 35 36/** 37 * The Camera class is used to set image capture settings, start/stop preview, 38 * snap pictures, and retrieve frames for encoding for video. This class is a 39 * client for the Camera service, which manages the actual camera hardware. 40 * 41 * <p>To access the device camera, you must declare the 42 * {@link android.Manifest.permission#CAMERA} permission in your Android 43 * Manifest. Also be sure to include the 44 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 45 * manifest element to declare camera features used by your application. 46 * For example, if you use the camera and auto-focus feature, your Manifest 47 * should include the following:</p> 48 * <pre> <uses-permission android:name="android.permission.CAMERA" /> 49 * <uses-feature android:name="android.hardware.camera" /> 50 * <uses-feature android:name="android.hardware.camera.autofocus" /></pre> 51 * 52 * <p>To take pictures with this class, use the following steps:</p> 53 * 54 * <ol> 55 * <li>Obtain an instance of Camera from {@link #open(int)}. 56 * 57 * <li>Get existing (default) settings with {@link #getParameters()}. 58 * 59 * <li>If necessary, modify the returned {@link Camera.Parameters} object and call 60 * {@link #setParameters(Camera.Parameters)}. 61 * 62 * <li>If desired, call {@link #setDisplayOrientation(int)}. 63 * 64 * <li><b>Important</b>: Pass a fully initialized {@link SurfaceHolder} to 65 * {@link #setPreviewDisplay(SurfaceHolder)}. Without a surface, the camera 66 * will be unable to start the preview. 67 * 68 * <li><b>Important</b>: Call {@link #startPreview()} to start updating the 69 * preview surface. Preview must be started before you can take a picture. 70 * 71 * <li>When you want, call {@link #takePicture(Camera.ShutterCallback, 72 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)} to 73 * capture a photo. Wait for the callbacks to provide the actual image data. 74 * 75 * <li>After taking a picture, preview display will have stopped. To take more 76 * photos, call {@link #startPreview()} again first. 77 * 78 * <li>Call {@link #stopPreview()} to stop updating the preview surface. 79 * 80 * <li><b>Important:</b> Call {@link #release()} to release the camera for 81 * use by other applications. Applications should release the camera 82 * immediately in {@link android.app.Activity#onPause()} (and re-{@link #open()} 83 * it in {@link android.app.Activity#onResume()}). 84 * </ol> 85 * 86 * <p>To quickly switch to video recording mode, use these steps:</p> 87 * 88 * <ol> 89 * <li>Obtain and initialize a Camera and start preview as described above. 90 * 91 * <li>Call {@link #unlock()} to allow the media process to access the camera. 92 * 93 * <li>Pass the camera to {@link android.media.MediaRecorder#setCamera(Camera)}. 94 * See {@link android.media.MediaRecorder} information about video recording. 95 * 96 * <li>When finished recording, call {@link #reconnect()} to re-acquire 97 * and re-lock the camera. 98 * 99 * <li>If desired, restart preview and take more photos or videos. 100 * 101 * <li>Call {@link #stopPreview()} and {@link #release()} as described above. 102 * </ol> 103 * 104 * <p>This class is not thread-safe, and is meant for use from one event thread. 105 * Most long-running operations (preview, focus, photo capture, etc) happen 106 * asynchronously and invoke callbacks as necessary. Callbacks will be invoked 107 * on the event thread {@link #open(int)} was called from. This class's methods 108 * must never be called from multiple threads at once.</p> 109 * 110 * <p class="caution"><strong>Caution:</strong> Different Android-powered devices 111 * may have different hardware specifications, such as megapixel ratings and 112 * auto-focus capabilities. In order for your application to be compatible with 113 * more devices, you should not make assumptions about the device camera 114 * specifications.</p> 115 */ 116public class Camera { 117 private static final String TAG = "Camera"; 118 119 // These match the enums in frameworks/base/include/camera/Camera.h 120 private static final int CAMERA_MSG_ERROR = 0x001; 121 private static final int CAMERA_MSG_SHUTTER = 0x002; 122 private static final int CAMERA_MSG_FOCUS = 0x004; 123 private static final int CAMERA_MSG_ZOOM = 0x008; 124 private static final int CAMERA_MSG_PREVIEW_FRAME = 0x010; 125 private static final int CAMERA_MSG_VIDEO_FRAME = 0x020; 126 private static final int CAMERA_MSG_POSTVIEW_FRAME = 0x040; 127 private static final int CAMERA_MSG_RAW_IMAGE = 0x080; 128 private static final int CAMERA_MSG_COMPRESSED_IMAGE = 0x100; 129 private static final int CAMERA_MSG_ALL_MSGS = 0x1FF; 130 131 private int mNativeContext; // accessed by native methods 132 private EventHandler mEventHandler; 133 private ShutterCallback mShutterCallback; 134 private PictureCallback mRawImageCallback; 135 private PictureCallback mJpegCallback; 136 private PreviewCallback mPreviewCallback; 137 private PictureCallback mPostviewCallback; 138 private AutoFocusCallback mAutoFocusCallback; 139 private OnZoomChangeListener mZoomListener; 140 private ErrorCallback mErrorCallback; 141 private boolean mOneShot; 142 private boolean mWithBuffer; 143 144 /** 145 * Returns the number of physical cameras available on this device. 146 */ 147 public native static int getNumberOfCameras(); 148 149 /** 150 * Returns the information about a particular camera. 151 * If {@link #getNumberOfCameras()} returns N, the valid id is 0 to N-1. 152 */ 153 public native static void getCameraInfo(int cameraId, CameraInfo cameraInfo); 154 155 /** 156 * Information about a camera 157 */ 158 public static class CameraInfo { 159 /** 160 * The facing of the camera is opposite to that of the screen. 161 */ 162 public static final int CAMERA_FACING_BACK = 0; 163 164 /** 165 * The facing of the camera is the same as that of the screen. 166 */ 167 public static final int CAMERA_FACING_FRONT = 1; 168 169 /** 170 * The direction that the camera faces to. It should be 171 * CAMERA_FACING_BACK or CAMERA_FACING_FRONT. 172 */ 173 public int facing; 174 175 /** 176 * <p>The orientation of the camera image. The value is the angle that the 177 * camera image needs to be rotated clockwise so it shows correctly on 178 * the display in its natural orientation. It should be 0, 90, 180, or 270.</p> 179 * 180 * <p>For example, suppose a device has a naturally tall screen. The 181 * back-facing camera sensor is mounted in landscape. You are looking at 182 * the screen. If the top side of the camera sensor is aligned with the 183 * right edge of the screen in natural orientation, the value should be 184 * 90. If the top side of a front-facing camera sensor is aligned with 185 * the right of the screen, the value should be 270.</p> 186 * 187 * @see #setDisplayOrientation(int) 188 * @see Parameters#setRotation(int) 189 * @see Parameters#setPreviewSize(int, int) 190 * @see Parameters#setPictureSize(int, int) 191 * @see Parameters#setJpegThumbnailSize(int, int) 192 */ 193 public int orientation; 194 }; 195 196 /** 197 * Creates a new Camera object to access a particular hardware camera. 198 * 199 * <p>You must call {@link #release()} when you are done using the camera, 200 * otherwise it will remain locked and be unavailable to other applications. 201 * 202 * <p>Your application should only have one Camera object active at a time 203 * for a particular hardware camera. 204 * 205 * <p>Callbacks from other methods are delivered to the event loop of the 206 * thread which called open(). If this thread has no event loop, then 207 * callbacks are delivered to the main application event loop. If there 208 * is no main application event loop, callbacks are not delivered. 209 * 210 * <p class="caution"><b>Caution:</b> On some devices, this method may 211 * take a long time to complete. It is best to call this method from a 212 * worker thread (possibly using {@link android.os.AsyncTask}) to avoid 213 * blocking the main application UI thread. 214 * 215 * @param cameraId the hardware camera to access, between 0 and 216 * {@link #getNumberOfCameras()}-1. 217 * @return a new Camera object, connected, locked and ready for use. 218 * @throws RuntimeException if connection to the camera service fails (for 219 * example, if the camera is in use by another process or device policy 220 * manager has disabled the camera). 221 * @see android.app.admin.DevicePolicyManager#getCameraDisabled(android.content.ComponentName) 222 */ 223 public static Camera open(int cameraId) { 224 return new Camera(cameraId); 225 } 226 227 /** 228 * Creates a new Camera object to access the first back-facing camera on the 229 * device. If the device does not have a back-facing camera, this returns 230 * null. 231 * @see #open(int) 232 */ 233 public static Camera open() { 234 int numberOfCameras = getNumberOfCameras(); 235 CameraInfo cameraInfo = new CameraInfo(); 236 for (int i = 0; i < numberOfCameras; i++) { 237 getCameraInfo(i, cameraInfo); 238 if (cameraInfo.facing == CameraInfo.CAMERA_FACING_BACK) { 239 return new Camera(i); 240 } 241 } 242 return null; 243 } 244 245 Camera(int cameraId) { 246 mShutterCallback = null; 247 mRawImageCallback = null; 248 mJpegCallback = null; 249 mPreviewCallback = null; 250 mPostviewCallback = null; 251 mZoomListener = null; 252 253 Looper looper; 254 if ((looper = Looper.myLooper()) != null) { 255 mEventHandler = new EventHandler(this, looper); 256 } else if ((looper = Looper.getMainLooper()) != null) { 257 mEventHandler = new EventHandler(this, looper); 258 } else { 259 mEventHandler = null; 260 } 261 262 native_setup(new WeakReference<Camera>(this), cameraId); 263 } 264 265 protected void finalize() { 266 native_release(); 267 } 268 269 private native final void native_setup(Object camera_this, int cameraId); 270 private native final void native_release(); 271 272 273 /** 274 * Disconnects and releases the Camera object resources. 275 * 276 * <p>You must call this as soon as you're done with the Camera object.</p> 277 */ 278 public final void release() { 279 native_release(); 280 } 281 282 /** 283 * Unlocks the camera to allow another process to access it. 284 * Normally, the camera is locked to the process with an active Camera 285 * object until {@link #release()} is called. To allow rapid handoff 286 * between processes, you can call this method to release the camera 287 * temporarily for another process to use; once the other process is done 288 * you can call {@link #reconnect()} to reclaim the camera. 289 * 290 * <p>This must be done before calling 291 * {@link android.media.MediaRecorder#setCamera(Camera)}. This cannot be 292 * called after recording starts. 293 * 294 * <p>If you are not recording video, you probably do not need this method. 295 * 296 * @throws RuntimeException if the camera cannot be unlocked. 297 */ 298 public native final void unlock(); 299 300 /** 301 * Re-locks the camera to prevent other processes from accessing it. 302 * Camera objects are locked by default unless {@link #unlock()} is 303 * called. Normally {@link #reconnect()} is used instead. 304 * 305 * <p>Since API level 13, camera is automatically locked for applications in 306 * {@link android.media.MediaRecorder#start()}. Applications can use the 307 * camera (ex: zoom) after recording starts. There is no need to call this 308 * after recording starts or stops. 309 * 310 * <p>If you are not recording video, you probably do not need this method. 311 * 312 * @throws RuntimeException if the camera cannot be re-locked (for 313 * example, if the camera is still in use by another process). 314 */ 315 public native final void lock(); 316 317 /** 318 * Reconnects to the camera service after another process used it. 319 * After {@link #unlock()} is called, another process may use the 320 * camera; when the process is done, you must reconnect to the camera, 321 * which will re-acquire the lock and allow you to continue using the 322 * camera. 323 * 324 * <p>Since API level 13, camera is automatically locked for applications in 325 * {@link android.media.MediaRecorder#start()}. Applications can use the 326 * camera (ex: zoom) after recording starts. There is no need to call this 327 * after recording starts or stops. 328 * 329 * <p>If you are not recording video, you probably do not need this method. 330 * 331 * @throws IOException if a connection cannot be re-established (for 332 * example, if the camera is still in use by another process). 333 */ 334 public native final void reconnect() throws IOException; 335 336 /** 337 * Sets the {@link Surface} to be used for live preview. 338 * Either a surface or surface texture is necessary for preview, and 339 * preview is necessary to take pictures. The same surface can be re-set 340 * without harm. Setting a preview surface will un-set any preview surface 341 * texture that was set via {@link #setPreviewTexture}. 342 * 343 * <p>The {@link SurfaceHolder} must already contain a surface when this 344 * method is called. If you are using {@link android.view.SurfaceView}, 345 * you will need to register a {@link SurfaceHolder.Callback} with 346 * {@link SurfaceHolder#addCallback(SurfaceHolder.Callback)} and wait for 347 * {@link SurfaceHolder.Callback#surfaceCreated(SurfaceHolder)} before 348 * calling setPreviewDisplay() or starting preview. 349 * 350 * <p>This method must be called before {@link #startPreview()}. The 351 * one exception is that if the preview surface is not set (or set to null) 352 * before startPreview() is called, then this method may be called once 353 * with a non-null parameter to set the preview surface. (This allows 354 * camera setup and surface creation to happen in parallel, saving time.) 355 * The preview surface may not otherwise change while preview is running. 356 * 357 * @param holder containing the Surface on which to place the preview, 358 * or null to remove the preview surface 359 * @throws IOException if the method fails (for example, if the surface 360 * is unavailable or unsuitable). 361 */ 362 public final void setPreviewDisplay(SurfaceHolder holder) throws IOException { 363 if (holder != null) { 364 setPreviewDisplay(holder.getSurface()); 365 } else { 366 setPreviewDisplay((Surface)null); 367 } 368 } 369 370 private native final void setPreviewDisplay(Surface surface) throws IOException; 371 372 /** 373 * Sets the {@link SurfaceTexture} to be used for live preview. 374 * Either a surface or surface texture is necessary for preview, and 375 * preview is necessary to take pictures. The same surface texture can be 376 * re-set without harm. Setting a preview surface texture will un-set any 377 * preview surface that was set via {@link #setPreviewDisplay}. 378 * 379 * <p>This method must be called before {@link #startPreview()}. The 380 * one exception is that if the preview surface texture is not set (or set 381 * to null) before startPreview() is called, then this method may be called 382 * once with a non-null parameter to set the preview surface. (This allows 383 * camera setup and surface creation to happen in parallel, saving time.) 384 * The preview surface texture may not otherwise change while preview is 385 * running. 386 * 387 * <p>The timestamps provided by {@link SurfaceTexture#getTimestamp()} for a 388 * SurfaceTexture set as the preview texture have an unspecified zero point, 389 * and cannot be directly compared between different cameras or different 390 * instances of the same camera, or across multiple runs of the same 391 * program. 392 * 393 * @param surfaceTexture the {@link SurfaceTexture} to which the preview 394 * images are to be sent or null to remove the current preview surface 395 * texture 396 * @throws IOException if the method fails (for example, if the surface 397 * texture is unavailable or unsuitable). 398 */ 399 public native final void setPreviewTexture(SurfaceTexture surfaceTexture) throws IOException; 400 401 /** 402 * Callback interface used to deliver copies of preview frames as 403 * they are displayed. 404 * 405 * @see #setPreviewCallback(Camera.PreviewCallback) 406 * @see #setOneShotPreviewCallback(Camera.PreviewCallback) 407 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 408 * @see #startPreview() 409 */ 410 public interface PreviewCallback 411 { 412 /** 413 * Called as preview frames are displayed. This callback is invoked 414 * on the event thread {@link #open(int)} was called from. 415 * 416 * @param data the contents of the preview frame in the format defined 417 * by {@link android.graphics.ImageFormat}, which can be queried 418 * with {@link android.hardware.Camera.Parameters#getPreviewFormat()}. 419 * If {@link android.hardware.Camera.Parameters#setPreviewFormat(int)} 420 * is never called, the default will be the YCbCr_420_SP 421 * (NV21) format. 422 * @param camera the Camera service object. 423 */ 424 void onPreviewFrame(byte[] data, Camera camera); 425 }; 426 427 /** 428 * Starts capturing and drawing preview frames to the screen. 429 * Preview will not actually start until a surface is supplied 430 * with {@link #setPreviewDisplay(SurfaceHolder)} or 431 * {@link #setPreviewTexture(SurfaceTexture)}. 432 * 433 * <p>If {@link #setPreviewCallback(Camera.PreviewCallback)}, 434 * {@link #setOneShotPreviewCallback(Camera.PreviewCallback)}, or 435 * {@link #setPreviewCallbackWithBuffer(Camera.PreviewCallback)} were 436 * called, {@link Camera.PreviewCallback#onPreviewFrame(byte[], Camera)} 437 * will be called when preview data becomes available. 438 */ 439 public native final void startPreview(); 440 441 /** 442 * Stops capturing and drawing preview frames to the surface, and 443 * resets the camera for a future call to {@link #startPreview()}. 444 */ 445 public native final void stopPreview(); 446 447 /** 448 * Return current preview state. 449 * 450 * FIXME: Unhide before release 451 * @hide 452 */ 453 public native final boolean previewEnabled(); 454 455 /** 456 * Installs a callback to be invoked for every preview frame in addition 457 * to displaying them on the screen. The callback will be repeatedly called 458 * for as long as preview is active. This method can be called at any time, 459 * even while preview is live. Any other preview callbacks are overridden. 460 * 461 * @param cb a callback object that receives a copy of each preview frame, 462 * or null to stop receiving callbacks. 463 */ 464 public final void setPreviewCallback(PreviewCallback cb) { 465 mPreviewCallback = cb; 466 mOneShot = false; 467 mWithBuffer = false; 468 // Always use one-shot mode. We fake camera preview mode by 469 // doing one-shot preview continuously. 470 setHasPreviewCallback(cb != null, false); 471 } 472 473 /** 474 * Installs a callback to be invoked for the next preview frame in addition 475 * to displaying it on the screen. After one invocation, the callback is 476 * cleared. This method can be called any time, even when preview is live. 477 * Any other preview callbacks are overridden. 478 * 479 * @param cb a callback object that receives a copy of the next preview frame, 480 * or null to stop receiving callbacks. 481 */ 482 public final void setOneShotPreviewCallback(PreviewCallback cb) { 483 mPreviewCallback = cb; 484 mOneShot = true; 485 mWithBuffer = false; 486 setHasPreviewCallback(cb != null, false); 487 } 488 489 private native final void setHasPreviewCallback(boolean installed, boolean manualBuffer); 490 491 /** 492 * Installs a callback to be invoked for every preview frame, using buffers 493 * supplied with {@link #addCallbackBuffer(byte[])}, in addition to 494 * displaying them on the screen. The callback will be repeatedly called 495 * for as long as preview is active and buffers are available. 496 * Any other preview callbacks are overridden. 497 * 498 * <p>The purpose of this method is to improve preview efficiency and frame 499 * rate by allowing preview frame memory reuse. You must call 500 * {@link #addCallbackBuffer(byte[])} at some point -- before or after 501 * calling this method -- or no callbacks will received. 502 * 503 * The buffer queue will be cleared if this method is called with a null 504 * callback, {@link #setPreviewCallback(Camera.PreviewCallback)} is called, 505 * or {@link #setOneShotPreviewCallback(Camera.PreviewCallback)} is called. 506 * 507 * @param cb a callback object that receives a copy of the preview frame, 508 * or null to stop receiving callbacks and clear the buffer queue. 509 * @see #addCallbackBuffer(byte[]) 510 */ 511 public final void setPreviewCallbackWithBuffer(PreviewCallback cb) { 512 mPreviewCallback = cb; 513 mOneShot = false; 514 mWithBuffer = true; 515 setHasPreviewCallback(cb != null, true); 516 } 517 518 /** 519 * Adds a pre-allocated buffer to the preview callback buffer queue. 520 * Applications can add one or more buffers to the queue. When a preview 521 * frame arrives and there is still at least one available buffer, the 522 * buffer will be used and removed from the queue. Then preview callback is 523 * invoked with the buffer. If a frame arrives and there is no buffer left, 524 * the frame is discarded. Applications should add buffers back when they 525 * finish processing the data in them. 526 * 527 * <p>The size of the buffer is determined by multiplying the preview 528 * image width, height, and bytes per pixel. The width and height can be 529 * read from {@link Camera.Parameters#getPreviewSize()}. Bytes per pixel 530 * can be computed from 531 * {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 8, 532 * using the image format from {@link Camera.Parameters#getPreviewFormat()}. 533 * 534 * <p>This method is only necessary when 535 * {@link #setPreviewCallbackWithBuffer(PreviewCallback)} is used. When 536 * {@link #setPreviewCallback(PreviewCallback)} or 537 * {@link #setOneShotPreviewCallback(PreviewCallback)} are used, buffers 538 * are automatically allocated. When a supplied buffer is too small to 539 * hold the preview frame data, preview callback will return null and 540 * the buffer will be removed from the buffer queue. 541 * 542 * @param callbackBuffer the buffer to add to the queue. 543 * The size should be width * height * bits_per_pixel / 8. 544 * @see #setPreviewCallbackWithBuffer(PreviewCallback) 545 */ 546 public final void addCallbackBuffer(byte[] callbackBuffer) 547 { 548 _addCallbackBuffer(callbackBuffer, CAMERA_MSG_PREVIEW_FRAME); 549 } 550 551 /** 552 * Adds a pre-allocated buffer to the raw image callback buffer queue. 553 * Applications can add one or more buffers to the queue. When a raw image 554 * frame arrives and there is still at least one available buffer, the 555 * buffer will be used to hold the raw image data and removed from the 556 * queue. Then raw image callback is invoked with the buffer. If a raw 557 * image frame arrives but there is no buffer left, the frame is 558 * discarded. Applications should add buffers back when they finish 559 * processing the data in them by calling this method again in order 560 * to avoid running out of raw image callback buffers. 561 * 562 * <p>The size of the buffer is determined by multiplying the raw image 563 * width, height, and bytes per pixel. The width and height can be 564 * read from {@link Camera.Parameters#getPictureSize()}. Bytes per pixel 565 * can be computed from 566 * {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 8, 567 * using the image format from {@link Camera.Parameters#getPreviewFormat()}. 568 * 569 * <p>This method is only necessary when the PictureCallbck for raw image 570 * is used while calling {@link #takePicture(Camera.ShutterCallback, 571 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}. 572 * 573 * <p>Please note that by calling this method, the mode for 574 * application-managed callback buffers is triggered. If this method has 575 * never been called, null will be returned by the raw image callback since 576 * there is no image callback buffer available. Furthermore, When a supplied 577 * buffer is too small to hold the raw image data, raw image callback will 578 * return null and the buffer will be removed from the buffer queue. 579 * 580 * @param callbackBuffer the buffer to add to the raw image callback buffer 581 * queue. The size should be width * height * (bits per pixel) / 8. An 582 * null callbackBuffer will be ignored and won't be added to the queue. 583 * 584 * @see #takePicture(Camera.ShutterCallback, 585 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}. 586 * 587 * {@hide} 588 */ 589 public final void addRawImageCallbackBuffer(byte[] callbackBuffer) 590 { 591 addCallbackBuffer(callbackBuffer, CAMERA_MSG_RAW_IMAGE); 592 } 593 594 private final void addCallbackBuffer(byte[] callbackBuffer, int msgType) 595 { 596 // CAMERA_MSG_VIDEO_FRAME may be allowed in the future. 597 if (msgType != CAMERA_MSG_PREVIEW_FRAME && 598 msgType != CAMERA_MSG_RAW_IMAGE) { 599 throw new IllegalArgumentException( 600 "Unsupported message type: " + msgType); 601 } 602 603 _addCallbackBuffer(callbackBuffer, msgType); 604 } 605 606 private native final void _addCallbackBuffer( 607 byte[] callbackBuffer, int msgType); 608 609 private class EventHandler extends Handler 610 { 611 private Camera mCamera; 612 613 public EventHandler(Camera c, Looper looper) { 614 super(looper); 615 mCamera = c; 616 } 617 618 @Override 619 public void handleMessage(Message msg) { 620 switch(msg.what) { 621 case CAMERA_MSG_SHUTTER: 622 if (mShutterCallback != null) { 623 mShutterCallback.onShutter(); 624 } 625 return; 626 627 case CAMERA_MSG_RAW_IMAGE: 628 if (mRawImageCallback != null) { 629 mRawImageCallback.onPictureTaken((byte[])msg.obj, mCamera); 630 } 631 return; 632 633 case CAMERA_MSG_COMPRESSED_IMAGE: 634 if (mJpegCallback != null) { 635 mJpegCallback.onPictureTaken((byte[])msg.obj, mCamera); 636 } 637 return; 638 639 case CAMERA_MSG_PREVIEW_FRAME: 640 if (mPreviewCallback != null) { 641 PreviewCallback cb = mPreviewCallback; 642 if (mOneShot) { 643 // Clear the callback variable before the callback 644 // in case the app calls setPreviewCallback from 645 // the callback function 646 mPreviewCallback = null; 647 } else if (!mWithBuffer) { 648 // We're faking the camera preview mode to prevent 649 // the app from being flooded with preview frames. 650 // Set to oneshot mode again. 651 setHasPreviewCallback(true, false); 652 } 653 cb.onPreviewFrame((byte[])msg.obj, mCamera); 654 } 655 return; 656 657 case CAMERA_MSG_POSTVIEW_FRAME: 658 if (mPostviewCallback != null) { 659 mPostviewCallback.onPictureTaken((byte[])msg.obj, mCamera); 660 } 661 return; 662 663 case CAMERA_MSG_FOCUS: 664 if (mAutoFocusCallback != null) { 665 mAutoFocusCallback.onAutoFocus(msg.arg1 == 0 ? false : true, mCamera); 666 } 667 return; 668 669 case CAMERA_MSG_ZOOM: 670 if (mZoomListener != null) { 671 mZoomListener.onZoomChange(msg.arg1, msg.arg2 != 0, mCamera); 672 } 673 return; 674 675 case CAMERA_MSG_ERROR : 676 Log.e(TAG, "Error " + msg.arg1); 677 if (mErrorCallback != null) { 678 mErrorCallback.onError(msg.arg1, mCamera); 679 } 680 return; 681 682 default: 683 Log.e(TAG, "Unknown message type " + msg.what); 684 return; 685 } 686 } 687 } 688 689 private static void postEventFromNative(Object camera_ref, 690 int what, int arg1, int arg2, Object obj) 691 { 692 Camera c = (Camera)((WeakReference)camera_ref).get(); 693 if (c == null) 694 return; 695 696 if (c.mEventHandler != null) { 697 Message m = c.mEventHandler.obtainMessage(what, arg1, arg2, obj); 698 c.mEventHandler.sendMessage(m); 699 } 700 } 701 702 /** 703 * Callback interface used to notify on completion of camera auto focus. 704 * 705 * <p>Devices that do not support auto-focus will receive a "fake" 706 * callback to this interface. If your application needs auto-focus and 707 * should not be installed on devices <em>without</em> auto-focus, you must 708 * declare that your app uses the 709 * {@code android.hardware.camera.autofocus} feature, in the 710 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 711 * manifest element.</p> 712 * 713 * @see #autoFocus(AutoFocusCallback) 714 */ 715 public interface AutoFocusCallback 716 { 717 /** 718 * Called when the camera auto focus completes. If the camera 719 * does not support auto-focus and autoFocus is called, 720 * onAutoFocus will be called immediately with a fake value of 721 * <code>success</code> set to <code>true</code>. 722 * 723 * The auto-focus routine may lock auto-exposure and auto-white balance 724 * after it completes. To check for the state of these locks, use the 725 * {@link android.hardware.Camera.Parameters#getAutoExposureLock()} and 726 * {@link android.hardware.Camera.Parameters#getAutoWhiteBalanceLock()} 727 * methods. If such locking is undesirable, use 728 * {@link android.hardware.Camera.Parameters#setAutoExposureLock(boolean)} 729 * and 730 * {@link android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean)} 731 * to release the locks. 732 * 733 * @param success true if focus was successful, false if otherwise 734 * @param camera the Camera service object 735 * @see android.hardware.Camera.Parameters#setAutoExposureLock(boolean) 736 * @see android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean) 737 */ 738 void onAutoFocus(boolean success, Camera camera); 739 }; 740 741 /** 742 * Starts camera auto-focus and registers a callback function to run when 743 * the camera is focused. This method is only valid when preview is active 744 * (between {@link #startPreview()} and before {@link #stopPreview()}). 745 * 746 * <p>Callers should check 747 * {@link android.hardware.Camera.Parameters#getFocusMode()} to determine if 748 * this method should be called. If the camera does not support auto-focus, 749 * it is a no-op and {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} 750 * callback will be called immediately. 751 * 752 * <p>If your application should not be installed 753 * on devices without auto-focus, you must declare that your application 754 * uses auto-focus with the 755 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 756 * manifest element.</p> 757 * 758 * <p>If the current flash mode is not 759 * {@link android.hardware.Camera.Parameters#FLASH_MODE_OFF}, flash may be 760 * fired during auto-focus, depending on the driver and camera hardware.<p> 761 * 762 * The auto-focus routine may lock auto-exposure and auto-white balance 763 * after it completes. To check for the state of these locks, use the 764 * {@link android.hardware.Camera.Parameters#getAutoExposureLock()} and 765 * {@link android.hardware.Camera.Parameters#getAutoWhiteBalanceLock()} 766 * methods after the {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} 767 * callback is invoked. If such locking is undesirable, use 768 * {@link android.hardware.Camera.Parameters#setAutoExposureLock(boolean)} 769 * and 770 * {@link android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean)} 771 * to release the locks. 772 * 773 * @param cb the callback to run 774 * @see #cancelAutoFocus() 775 * @see android.hardware.Camera.Parameters#setAutoExposureLock(boolean) 776 * @see android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean) 777 */ 778 public final void autoFocus(AutoFocusCallback cb) 779 { 780 mAutoFocusCallback = cb; 781 native_autoFocus(); 782 } 783 private native final void native_autoFocus(); 784 785 /** 786 * Cancels any auto-focus function in progress. 787 * Whether or not auto-focus is currently in progress, 788 * this function will return the focus position to the default. 789 * If the camera does not support auto-focus, this is a no-op. 790 * 791 * Canceling auto-focus will return the auto-exposure lock and auto-white 792 * balance lock to their state before {@link #autoFocus(AutoFocusCallback)} 793 * was called. 794 * 795 * @see #autoFocus(Camera.AutoFocusCallback) 796 * @see android.hardware.Camera.Parameters#setAutoExposureLock(boolean) 797 * @see android.hardware.Camera.Parameters#setAutoWhiteBalanceLock(boolean) 798 */ 799 public final void cancelAutoFocus() 800 { 801 mAutoFocusCallback = null; 802 native_cancelAutoFocus(); 803 } 804 private native final void native_cancelAutoFocus(); 805 806 /** 807 * Callback interface used to signal the moment of actual image capture. 808 * 809 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 810 */ 811 public interface ShutterCallback 812 { 813 /** 814 * Called as near as possible to the moment when a photo is captured 815 * from the sensor. This is a good opportunity to play a shutter sound 816 * or give other feedback of camera operation. This may be some time 817 * after the photo was triggered, but some time before the actual data 818 * is available. 819 */ 820 void onShutter(); 821 } 822 823 /** 824 * Callback interface used to supply image data from a photo capture. 825 * 826 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 827 */ 828 public interface PictureCallback { 829 /** 830 * Called when image data is available after a picture is taken. 831 * The format of the data depends on the context of the callback 832 * and {@link Camera.Parameters} settings. 833 * 834 * @param data a byte array of the picture data 835 * @param camera the Camera service object 836 */ 837 void onPictureTaken(byte[] data, Camera camera); 838 }; 839 840 /** 841 * Equivalent to takePicture(shutter, raw, null, jpeg). 842 * 843 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 844 */ 845 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 846 PictureCallback jpeg) { 847 takePicture(shutter, raw, null, jpeg); 848 } 849 private native final void native_takePicture(int msgType); 850 851 /** 852 * Triggers an asynchronous image capture. The camera service will initiate 853 * a series of callbacks to the application as the image capture progresses. 854 * The shutter callback occurs after the image is captured. This can be used 855 * to trigger a sound to let the user know that image has been captured. The 856 * raw callback occurs when the raw image data is available (NOTE: the data 857 * will be null if there is no raw image callback buffer available or the 858 * raw image callback buffer is not large enough to hold the raw image). 859 * The postview callback occurs when a scaled, fully processed postview 860 * image is available (NOTE: not all hardware supports this). The jpeg 861 * callback occurs when the compressed image is available. If the 862 * application does not need a particular callback, a null can be passed 863 * instead of a callback method. 864 * 865 * <p>This method is only valid when preview is active (after 866 * {@link #startPreview()}). Preview will be stopped after the image is 867 * taken; callers must call {@link #startPreview()} again if they want to 868 * re-start preview or take more pictures. This should not be called between 869 * {@link android.media.MediaRecorder#start()} and 870 * {@link android.media.MediaRecorder#stop()}. 871 * 872 * <p>After calling this method, you must not call {@link #startPreview()} 873 * or take another picture until the JPEG callback has returned. 874 * 875 * @param shutter the callback for image capture moment, or null 876 * @param raw the callback for raw (uncompressed) image data, or null 877 * @param postview callback with postview image data, may be null 878 * @param jpeg the callback for JPEG image data, or null 879 */ 880 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 881 PictureCallback postview, PictureCallback jpeg) { 882 mShutterCallback = shutter; 883 mRawImageCallback = raw; 884 mPostviewCallback = postview; 885 mJpegCallback = jpeg; 886 887 // If callback is not set, do not send me callbacks. 888 int msgType = 0; 889 if (mShutterCallback != null) { 890 msgType |= CAMERA_MSG_SHUTTER; 891 } 892 if (mRawImageCallback != null) { 893 msgType |= CAMERA_MSG_RAW_IMAGE; 894 } 895 if (mPostviewCallback != null) { 896 msgType |= CAMERA_MSG_POSTVIEW_FRAME; 897 } 898 if (mJpegCallback != null) { 899 msgType |= CAMERA_MSG_COMPRESSED_IMAGE; 900 } 901 902 native_takePicture(msgType); 903 } 904 905 /** 906 * Zooms to the requested value smoothly. The driver will notify {@link 907 * OnZoomChangeListener} of the zoom value and whether zoom is stopped at 908 * the time. For example, suppose the current zoom is 0 and startSmoothZoom 909 * is called with value 3. The 910 * {@link Camera.OnZoomChangeListener#onZoomChange(int, boolean, Camera)} 911 * method will be called three times with zoom values 1, 2, and 3. 912 * Applications can call {@link #stopSmoothZoom} to stop the zoom earlier. 913 * Applications should not call startSmoothZoom again or change the zoom 914 * value before zoom stops. If the supplied zoom value equals to the current 915 * zoom value, no zoom callback will be generated. This method is supported 916 * if {@link android.hardware.Camera.Parameters#isSmoothZoomSupported} 917 * returns true. 918 * 919 * @param value zoom value. The valid range is 0 to {@link 920 * android.hardware.Camera.Parameters#getMaxZoom}. 921 * @throws IllegalArgumentException if the zoom value is invalid. 922 * @throws RuntimeException if the method fails. 923 * @see #setZoomChangeListener(OnZoomChangeListener) 924 */ 925 public native final void startSmoothZoom(int value); 926 927 /** 928 * Stops the smooth zoom. Applications should wait for the {@link 929 * OnZoomChangeListener} to know when the zoom is actually stopped. This 930 * method is supported if {@link 931 * android.hardware.Camera.Parameters#isSmoothZoomSupported} is true. 932 * 933 * @throws RuntimeException if the method fails. 934 */ 935 public native final void stopSmoothZoom(); 936 937 /** 938 * Set the clockwise rotation of preview display in degrees. This affects 939 * the preview frames and the picture displayed after snapshot. This method 940 * is useful for portrait mode applications. Note that preview display of 941 * front-facing cameras is flipped horizontally before the rotation, that 942 * is, the image is reflected along the central vertical axis of the camera 943 * sensor. So the users can see themselves as looking into a mirror. 944 * 945 * <p>This does not affect the order of byte array passed in {@link 946 * PreviewCallback#onPreviewFrame}, JPEG pictures, or recorded videos. This 947 * method is not allowed to be called during preview. 948 * 949 * <p>If you want to make the camera image show in the same orientation as 950 * the display, you can use the following code. 951 * <pre> 952 * public static void setCameraDisplayOrientation(Activity activity, 953 * int cameraId, android.hardware.Camera camera) { 954 * android.hardware.Camera.CameraInfo info = 955 * new android.hardware.Camera.CameraInfo(); 956 * android.hardware.Camera.getCameraInfo(cameraId, info); 957 * int rotation = activity.getWindowManager().getDefaultDisplay() 958 * .getRotation(); 959 * int degrees = 0; 960 * switch (rotation) { 961 * case Surface.ROTATION_0: degrees = 0; break; 962 * case Surface.ROTATION_90: degrees = 90; break; 963 * case Surface.ROTATION_180: degrees = 180; break; 964 * case Surface.ROTATION_270: degrees = 270; break; 965 * } 966 * 967 * int result; 968 * if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) { 969 * result = (info.orientation + degrees) % 360; 970 * result = (360 - result) % 360; // compensate the mirror 971 * } else { // back-facing 972 * result = (info.orientation - degrees + 360) % 360; 973 * } 974 * camera.setDisplayOrientation(result); 975 * } 976 * </pre> 977 * @param degrees the angle that the picture will be rotated clockwise. 978 * Valid values are 0, 90, 180, and 270. The starting 979 * position is 0 (landscape). 980 * @see #setPreviewDisplay(SurfaceHolder) 981 */ 982 public native final void setDisplayOrientation(int degrees); 983 984 /** 985 * Callback interface for zoom changes during a smooth zoom operation. 986 * 987 * @see #setZoomChangeListener(OnZoomChangeListener) 988 * @see #startSmoothZoom(int) 989 */ 990 public interface OnZoomChangeListener 991 { 992 /** 993 * Called when the zoom value has changed during a smooth zoom. 994 * 995 * @param zoomValue the current zoom value. In smooth zoom mode, camera 996 * calls this for every new zoom value. 997 * @param stopped whether smooth zoom is stopped. If the value is true, 998 * this is the last zoom update for the application. 999 * @param camera the Camera service object 1000 */ 1001 void onZoomChange(int zoomValue, boolean stopped, Camera camera); 1002 }; 1003 1004 /** 1005 * Registers a listener to be notified when the zoom value is updated by the 1006 * camera driver during smooth zoom. 1007 * 1008 * @param listener the listener to notify 1009 * @see #startSmoothZoom(int) 1010 */ 1011 public final void setZoomChangeListener(OnZoomChangeListener listener) 1012 { 1013 mZoomListener = listener; 1014 } 1015 1016 // Error codes match the enum in include/ui/Camera.h 1017 1018 /** 1019 * Unspecified camera error. 1020 * @see Camera.ErrorCallback 1021 */ 1022 public static final int CAMERA_ERROR_UNKNOWN = 1; 1023 1024 /** 1025 * Media server died. In this case, the application must release the 1026 * Camera object and instantiate a new one. 1027 * @see Camera.ErrorCallback 1028 */ 1029 public static final int CAMERA_ERROR_SERVER_DIED = 100; 1030 1031 /** 1032 * Callback interface for camera error notification. 1033 * 1034 * @see #setErrorCallback(ErrorCallback) 1035 */ 1036 public interface ErrorCallback 1037 { 1038 /** 1039 * Callback for camera errors. 1040 * @param error error code: 1041 * <ul> 1042 * <li>{@link #CAMERA_ERROR_UNKNOWN} 1043 * <li>{@link #CAMERA_ERROR_SERVER_DIED} 1044 * </ul> 1045 * @param camera the Camera service object 1046 */ 1047 void onError(int error, Camera camera); 1048 }; 1049 1050 /** 1051 * Registers a callback to be invoked when an error occurs. 1052 * @param cb The callback to run 1053 */ 1054 public final void setErrorCallback(ErrorCallback cb) 1055 { 1056 mErrorCallback = cb; 1057 } 1058 1059 private native final void native_setParameters(String params); 1060 private native final String native_getParameters(); 1061 1062 /** 1063 * Changes the settings for this Camera service. 1064 * 1065 * @param params the Parameters to use for this Camera service 1066 * @throws RuntimeException if any parameter is invalid or not supported. 1067 * @see #getParameters() 1068 */ 1069 public void setParameters(Parameters params) { 1070 native_setParameters(params.flatten()); 1071 } 1072 1073 /** 1074 * Returns the current settings for this Camera service. 1075 * If modifications are made to the returned Parameters, they must be passed 1076 * to {@link #setParameters(Camera.Parameters)} to take effect. 1077 * 1078 * @see #setParameters(Camera.Parameters) 1079 */ 1080 public Parameters getParameters() { 1081 Parameters p = new Parameters(); 1082 String s = native_getParameters(); 1083 p.unflatten(s); 1084 return p; 1085 } 1086 1087 /** 1088 * Image size (width and height dimensions). 1089 */ 1090 public class Size { 1091 /** 1092 * Sets the dimensions for pictures. 1093 * 1094 * @param w the photo width (pixels) 1095 * @param h the photo height (pixels) 1096 */ 1097 public Size(int w, int h) { 1098 width = w; 1099 height = h; 1100 } 1101 /** 1102 * Compares {@code obj} to this size. 1103 * 1104 * @param obj the object to compare this size with. 1105 * @return {@code true} if the width and height of {@code obj} is the 1106 * same as those of this size. {@code false} otherwise. 1107 */ 1108 @Override 1109 public boolean equals(Object obj) { 1110 if (!(obj instanceof Size)) { 1111 return false; 1112 } 1113 Size s = (Size) obj; 1114 return width == s.width && height == s.height; 1115 } 1116 @Override 1117 public int hashCode() { 1118 return width * 32713 + height; 1119 } 1120 /** width of the picture */ 1121 public int width; 1122 /** height of the picture */ 1123 public int height; 1124 }; 1125 1126 /** 1127 * <p>The Area class is used for choosing specific metering and focus areas for 1128 * the camera to use when calculating auto-exposure, auto-white balance, and 1129 * auto-focus.</p> 1130 * 1131 * <p>To find out how many simultaneous areas a given camera supports, use 1132 * {@link Parameters#getMaxNumMeteringAreas()} and 1133 * {@link Parameters#getMaxNumFocusAreas()}. If metering or focusing area 1134 * selection is unsupported, these methods will return 0.</p> 1135 * 1136 * <p>Each Area consists of a rectangle specifying its bounds, and a weight 1137 * that determines its importance. The bounds are relative to the camera's 1138 * current field of view. The coordinates are mapped so that (-1000, -1000) 1139 * is always the top-left corner of the current field of view, and (1000, 1140 * 1000) is always the bottom-right corner of the current field of 1141 * view. Setting Areas with bounds outside that range is not allowed. Areas 1142 * with zero or negative width or height are not allowed.</p> 1143 * 1144 * <p>The weight must range from 1 to 1000, and represents a weight for 1145 * every pixel in the area. This means that a large metering area with 1146 * the same weight as a smaller area will have more effect in the 1147 * metering result. Metering areas can overlap and the driver 1148 * will add the weights in the overlap region.</p> 1149 * 1150 * @see Parameters#setFocusAreas(List) 1151 * @see Parameters#getFocusAreas() 1152 * @see Parameters#getMaxNumFocusAreas() 1153 * @see Parameters#setMeteringAreas(List) 1154 * @see Parameters#getMeteringAreas() 1155 * @see Parameters#getMaxNumMeteringAreas() 1156 */ 1157 public static class Area { 1158 /** 1159 * Create an area with specified rectangle and weight. 1160 * 1161 * @param rect the bounds of the area. 1162 * @param weight the weight of the area. 1163 */ 1164 public Area(Rect rect, int weight) { 1165 this.rect = rect; 1166 this.weight = weight; 1167 } 1168 /** 1169 * Compares {@code obj} to this area. 1170 * 1171 * @param obj the object to compare this area with. 1172 * @return {@code true} if the rectangle and weight of {@code obj} is 1173 * the same as those of this area. {@code false} otherwise. 1174 */ 1175 @Override 1176 public boolean equals(Object obj) { 1177 if (!(obj instanceof Area)) { 1178 return false; 1179 } 1180 Area a = (Area) obj; 1181 if (rect == null) { 1182 if (a.rect != null) return false; 1183 } else { 1184 if (!rect.equals(a.rect)) return false; 1185 } 1186 return weight == a.weight; 1187 } 1188 1189 /** 1190 * Bounds of the area. (-1000, -1000) represents the top-left of the 1191 * camera field of view, and (1000, 1000) represents the bottom-right of 1192 * the field of view. Setting bounds outside that range is not 1193 * allowed. Bounds with zero or negative width or height are not 1194 * allowed. 1195 * 1196 * @see Parameters#getFocusAreas() 1197 * @see Parameters#getMeteringAreas() 1198 */ 1199 public Rect rect; 1200 1201 /** 1202 * Weight of the area. The weight must range from 1 to 1000, and 1203 * represents a weight for every pixel in the area. This means that a 1204 * large metering area with the same weight as a smaller area will have 1205 * more effect in the metering result. Metering areas can overlap and 1206 * the driver will add the weights in the overlap region. 1207 * 1208 * @see Parameters#getFocusAreas() 1209 * @see Parameters#getMeteringAreas() 1210 */ 1211 public int weight; 1212 } 1213 1214 /** 1215 * Camera service settings. 1216 * 1217 * <p>To make camera parameters take effect, applications have to call 1218 * {@link Camera#setParameters(Camera.Parameters)}. For example, after 1219 * {@link Camera.Parameters#setWhiteBalance} is called, white balance is not 1220 * actually changed until {@link Camera#setParameters(Camera.Parameters)} 1221 * is called with the changed parameters object. 1222 * 1223 * <p>Different devices may have different camera capabilities, such as 1224 * picture size or flash modes. The application should query the camera 1225 * capabilities before setting parameters. For example, the application 1226 * should call {@link Camera.Parameters#getSupportedColorEffects()} before 1227 * calling {@link Camera.Parameters#setColorEffect(String)}. If the 1228 * camera does not support color effects, 1229 * {@link Camera.Parameters#getSupportedColorEffects()} will return null. 1230 */ 1231 public class Parameters { 1232 // Parameter keys to communicate with the camera driver. 1233 private static final String KEY_PREVIEW_SIZE = "preview-size"; 1234 private static final String KEY_PREVIEW_FORMAT = "preview-format"; 1235 private static final String KEY_PREVIEW_FRAME_RATE = "preview-frame-rate"; 1236 private static final String KEY_PREVIEW_FPS_RANGE = "preview-fps-range"; 1237 private static final String KEY_PICTURE_SIZE = "picture-size"; 1238 private static final String KEY_PICTURE_FORMAT = "picture-format"; 1239 private static final String KEY_JPEG_THUMBNAIL_SIZE = "jpeg-thumbnail-size"; 1240 private static final String KEY_JPEG_THUMBNAIL_WIDTH = "jpeg-thumbnail-width"; 1241 private static final String KEY_JPEG_THUMBNAIL_HEIGHT = "jpeg-thumbnail-height"; 1242 private static final String KEY_JPEG_THUMBNAIL_QUALITY = "jpeg-thumbnail-quality"; 1243 private static final String KEY_JPEG_QUALITY = "jpeg-quality"; 1244 private static final String KEY_ROTATION = "rotation"; 1245 private static final String KEY_GPS_LATITUDE = "gps-latitude"; 1246 private static final String KEY_GPS_LONGITUDE = "gps-longitude"; 1247 private static final String KEY_GPS_ALTITUDE = "gps-altitude"; 1248 private static final String KEY_GPS_TIMESTAMP = "gps-timestamp"; 1249 private static final String KEY_GPS_PROCESSING_METHOD = "gps-processing-method"; 1250 private static final String KEY_WHITE_BALANCE = "whitebalance"; 1251 private static final String KEY_EFFECT = "effect"; 1252 private static final String KEY_ANTIBANDING = "antibanding"; 1253 private static final String KEY_SCENE_MODE = "scene-mode"; 1254 private static final String KEY_FLASH_MODE = "flash-mode"; 1255 private static final String KEY_FOCUS_MODE = "focus-mode"; 1256 private static final String KEY_FOCUS_AREAS = "focus-areas"; 1257 private static final String KEY_MAX_NUM_FOCUS_AREAS = "max-num-focus-areas"; 1258 private static final String KEY_FOCAL_LENGTH = "focal-length"; 1259 private static final String KEY_HORIZONTAL_VIEW_ANGLE = "horizontal-view-angle"; 1260 private static final String KEY_VERTICAL_VIEW_ANGLE = "vertical-view-angle"; 1261 private static final String KEY_EXPOSURE_COMPENSATION = "exposure-compensation"; 1262 private static final String KEY_MAX_EXPOSURE_COMPENSATION = "max-exposure-compensation"; 1263 private static final String KEY_MIN_EXPOSURE_COMPENSATION = "min-exposure-compensation"; 1264 private static final String KEY_EXPOSURE_COMPENSATION_STEP = "exposure-compensation-step"; 1265 private static final String KEY_AUTO_EXPOSURE_LOCK = "auto-exposure-lock"; 1266 private static final String KEY_AUTO_EXPOSURE_LOCK_SUPPORTED = "auto-exposure-lock-supported"; 1267 private static final String KEY_AUTO_WHITEBALANCE_LOCK = "auto-whitebalance-lock"; 1268 private static final String KEY_AUTO_WHITEBALANCE_LOCK_SUPPORTED = "auto-whitebalance-lock-supported"; 1269 private static final String KEY_METERING_AREAS = "metering-areas"; 1270 private static final String KEY_MAX_NUM_METERING_AREAS = "max-num-metering-areas"; 1271 private static final String KEY_ZOOM = "zoom"; 1272 private static final String KEY_MAX_ZOOM = "max-zoom"; 1273 private static final String KEY_ZOOM_RATIOS = "zoom-ratios"; 1274 private static final String KEY_ZOOM_SUPPORTED = "zoom-supported"; 1275 private static final String KEY_SMOOTH_ZOOM_SUPPORTED = "smooth-zoom-supported"; 1276 private static final String KEY_FOCUS_DISTANCES = "focus-distances"; 1277 private static final String KEY_VIDEO_SIZE = "video-size"; 1278 private static final String KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO = 1279 "preferred-preview-size-for-video"; 1280 1281 // Parameter key suffix for supported values. 1282 private static final String SUPPORTED_VALUES_SUFFIX = "-values"; 1283 1284 private static final String TRUE = "true"; 1285 private static final String FALSE = "false"; 1286 1287 // Values for white balance settings. 1288 public static final String WHITE_BALANCE_AUTO = "auto"; 1289 public static final String WHITE_BALANCE_INCANDESCENT = "incandescent"; 1290 public static final String WHITE_BALANCE_FLUORESCENT = "fluorescent"; 1291 public static final String WHITE_BALANCE_WARM_FLUORESCENT = "warm-fluorescent"; 1292 public static final String WHITE_BALANCE_DAYLIGHT = "daylight"; 1293 public static final String WHITE_BALANCE_CLOUDY_DAYLIGHT = "cloudy-daylight"; 1294 public static final String WHITE_BALANCE_TWILIGHT = "twilight"; 1295 public static final String WHITE_BALANCE_SHADE = "shade"; 1296 1297 // Values for color effect settings. 1298 public static final String EFFECT_NONE = "none"; 1299 public static final String EFFECT_MONO = "mono"; 1300 public static final String EFFECT_NEGATIVE = "negative"; 1301 public static final String EFFECT_SOLARIZE = "solarize"; 1302 public static final String EFFECT_SEPIA = "sepia"; 1303 public static final String EFFECT_POSTERIZE = "posterize"; 1304 public static final String EFFECT_WHITEBOARD = "whiteboard"; 1305 public static final String EFFECT_BLACKBOARD = "blackboard"; 1306 public static final String EFFECT_AQUA = "aqua"; 1307 1308 // Values for antibanding settings. 1309 public static final String ANTIBANDING_AUTO = "auto"; 1310 public static final String ANTIBANDING_50HZ = "50hz"; 1311 public static final String ANTIBANDING_60HZ = "60hz"; 1312 public static final String ANTIBANDING_OFF = "off"; 1313 1314 // Values for flash mode settings. 1315 /** 1316 * Flash will not be fired. 1317 */ 1318 public static final String FLASH_MODE_OFF = "off"; 1319 1320 /** 1321 * Flash will be fired automatically when required. The flash may be fired 1322 * during preview, auto-focus, or snapshot depending on the driver. 1323 */ 1324 public static final String FLASH_MODE_AUTO = "auto"; 1325 1326 /** 1327 * Flash will always be fired during snapshot. The flash may also be 1328 * fired during preview or auto-focus depending on the driver. 1329 */ 1330 public static final String FLASH_MODE_ON = "on"; 1331 1332 /** 1333 * Flash will be fired in red-eye reduction mode. 1334 */ 1335 public static final String FLASH_MODE_RED_EYE = "red-eye"; 1336 1337 /** 1338 * Constant emission of light during preview, auto-focus and snapshot. 1339 * This can also be used for video recording. 1340 */ 1341 public static final String FLASH_MODE_TORCH = "torch"; 1342 1343 /** 1344 * Scene mode is off. 1345 */ 1346 public static final String SCENE_MODE_AUTO = "auto"; 1347 1348 /** 1349 * Take photos of fast moving objects. Same as {@link 1350 * #SCENE_MODE_SPORTS}. 1351 */ 1352 public static final String SCENE_MODE_ACTION = "action"; 1353 1354 /** 1355 * Take people pictures. 1356 */ 1357 public static final String SCENE_MODE_PORTRAIT = "portrait"; 1358 1359 /** 1360 * Take pictures on distant objects. 1361 */ 1362 public static final String SCENE_MODE_LANDSCAPE = "landscape"; 1363 1364 /** 1365 * Take photos at night. 1366 */ 1367 public static final String SCENE_MODE_NIGHT = "night"; 1368 1369 /** 1370 * Take people pictures at night. 1371 */ 1372 public static final String SCENE_MODE_NIGHT_PORTRAIT = "night-portrait"; 1373 1374 /** 1375 * Take photos in a theater. Flash light is off. 1376 */ 1377 public static final String SCENE_MODE_THEATRE = "theatre"; 1378 1379 /** 1380 * Take pictures on the beach. 1381 */ 1382 public static final String SCENE_MODE_BEACH = "beach"; 1383 1384 /** 1385 * Take pictures on the snow. 1386 */ 1387 public static final String SCENE_MODE_SNOW = "snow"; 1388 1389 /** 1390 * Take sunset photos. 1391 */ 1392 public static final String SCENE_MODE_SUNSET = "sunset"; 1393 1394 /** 1395 * Avoid blurry pictures (for example, due to hand shake). 1396 */ 1397 public static final String SCENE_MODE_STEADYPHOTO = "steadyphoto"; 1398 1399 /** 1400 * For shooting firework displays. 1401 */ 1402 public static final String SCENE_MODE_FIREWORKS = "fireworks"; 1403 1404 /** 1405 * Take photos of fast moving objects. Same as {@link 1406 * #SCENE_MODE_ACTION}. 1407 */ 1408 public static final String SCENE_MODE_SPORTS = "sports"; 1409 1410 /** 1411 * Take indoor low-light shot. 1412 */ 1413 public static final String SCENE_MODE_PARTY = "party"; 1414 1415 /** 1416 * Capture the naturally warm color of scenes lit by candles. 1417 */ 1418 public static final String SCENE_MODE_CANDLELIGHT = "candlelight"; 1419 1420 /** 1421 * Applications are looking for a barcode. Camera driver will be 1422 * optimized for barcode reading. 1423 */ 1424 public static final String SCENE_MODE_BARCODE = "barcode"; 1425 1426 /** 1427 * Auto-focus mode. Applications should call {@link 1428 * #autoFocus(AutoFocusCallback)} to start the focus in this mode. 1429 */ 1430 public static final String FOCUS_MODE_AUTO = "auto"; 1431 1432 /** 1433 * Focus is set at infinity. Applications should not call 1434 * {@link #autoFocus(AutoFocusCallback)} in this mode. 1435 */ 1436 public static final String FOCUS_MODE_INFINITY = "infinity"; 1437 1438 /** 1439 * Macro (close-up) focus mode. Applications should call 1440 * {@link #autoFocus(AutoFocusCallback)} to start the focus in this 1441 * mode. 1442 */ 1443 public static final String FOCUS_MODE_MACRO = "macro"; 1444 1445 /** 1446 * Focus is fixed. The camera is always in this mode if the focus is not 1447 * adjustable. If the camera has auto-focus, this mode can fix the 1448 * focus, which is usually at hyperfocal distance. Applications should 1449 * not call {@link #autoFocus(AutoFocusCallback)} in this mode. 1450 */ 1451 public static final String FOCUS_MODE_FIXED = "fixed"; 1452 1453 /** 1454 * Extended depth of field (EDOF). Focusing is done digitally and 1455 * continuously. Applications should not call {@link 1456 * #autoFocus(AutoFocusCallback)} in this mode. 1457 */ 1458 public static final String FOCUS_MODE_EDOF = "edof"; 1459 1460 /** 1461 * Continuous auto focus mode intended for video recording. The camera 1462 * continuously tries to focus. This is ideal for shooting video. 1463 * Applications still can call {@link 1464 * #takePicture(Camera.ShutterCallback, Camera.PictureCallback, 1465 * Camera.PictureCallback)} in this mode but the subject may not be in 1466 * focus. Auto focus starts when the parameter is set. Applications 1467 * should not call {@link #autoFocus(AutoFocusCallback)} in this mode. 1468 * To stop continuous focus, applications should change the focus mode 1469 * to other modes. 1470 */ 1471 public static final String FOCUS_MODE_CONTINUOUS_VIDEO = "continuous-video"; 1472 1473 // Indices for focus distance array. 1474 /** 1475 * The array index of near focus distance for use with 1476 * {@link #getFocusDistances(float[])}. 1477 */ 1478 public static final int FOCUS_DISTANCE_NEAR_INDEX = 0; 1479 1480 /** 1481 * The array index of optimal focus distance for use with 1482 * {@link #getFocusDistances(float[])}. 1483 */ 1484 public static final int FOCUS_DISTANCE_OPTIMAL_INDEX = 1; 1485 1486 /** 1487 * The array index of far focus distance for use with 1488 * {@link #getFocusDistances(float[])}. 1489 */ 1490 public static final int FOCUS_DISTANCE_FAR_INDEX = 2; 1491 1492 /** 1493 * The array index of minimum preview fps for use with {@link 1494 * #getPreviewFpsRange(int[])} or {@link 1495 * #getSupportedPreviewFpsRange()}. 1496 */ 1497 public static final int PREVIEW_FPS_MIN_INDEX = 0; 1498 1499 /** 1500 * The array index of maximum preview fps for use with {@link 1501 * #getPreviewFpsRange(int[])} or {@link 1502 * #getSupportedPreviewFpsRange()}. 1503 */ 1504 public static final int PREVIEW_FPS_MAX_INDEX = 1; 1505 1506 // Formats for setPreviewFormat and setPictureFormat. 1507 private static final String PIXEL_FORMAT_YUV422SP = "yuv422sp"; 1508 private static final String PIXEL_FORMAT_YUV420SP = "yuv420sp"; 1509 private static final String PIXEL_FORMAT_YUV422I = "yuv422i-yuyv"; 1510 private static final String PIXEL_FORMAT_YUV420P = "yuv420p"; 1511 private static final String PIXEL_FORMAT_RGB565 = "rgb565"; 1512 private static final String PIXEL_FORMAT_JPEG = "jpeg"; 1513 1514 private HashMap<String, String> mMap; 1515 1516 private Parameters() { 1517 mMap = new HashMap<String, String>(); 1518 } 1519 1520 /** 1521 * Writes the current Parameters to the log. 1522 * @hide 1523 * @deprecated 1524 */ 1525 public void dump() { 1526 Log.e(TAG, "dump: size=" + mMap.size()); 1527 for (String k : mMap.keySet()) { 1528 Log.e(TAG, "dump: " + k + "=" + mMap.get(k)); 1529 } 1530 } 1531 1532 /** 1533 * Creates a single string with all the parameters set in 1534 * this Parameters object. 1535 * <p>The {@link #unflatten(String)} method does the reverse.</p> 1536 * 1537 * @return a String with all values from this Parameters object, in 1538 * semi-colon delimited key-value pairs 1539 */ 1540 public String flatten() { 1541 StringBuilder flattened = new StringBuilder(); 1542 for (String k : mMap.keySet()) { 1543 flattened.append(k); 1544 flattened.append("="); 1545 flattened.append(mMap.get(k)); 1546 flattened.append(";"); 1547 } 1548 // chop off the extra semicolon at the end 1549 flattened.deleteCharAt(flattened.length()-1); 1550 return flattened.toString(); 1551 } 1552 1553 /** 1554 * Takes a flattened string of parameters and adds each one to 1555 * this Parameters object. 1556 * <p>The {@link #flatten()} method does the reverse.</p> 1557 * 1558 * @param flattened a String of parameters (key-value paired) that 1559 * are semi-colon delimited 1560 */ 1561 public void unflatten(String flattened) { 1562 mMap.clear(); 1563 1564 StringTokenizer tokenizer = new StringTokenizer(flattened, ";"); 1565 while (tokenizer.hasMoreElements()) { 1566 String kv = tokenizer.nextToken(); 1567 int pos = kv.indexOf('='); 1568 if (pos == -1) { 1569 continue; 1570 } 1571 String k = kv.substring(0, pos); 1572 String v = kv.substring(pos + 1); 1573 mMap.put(k, v); 1574 } 1575 } 1576 1577 public void remove(String key) { 1578 mMap.remove(key); 1579 } 1580 1581 /** 1582 * Sets a String parameter. 1583 * 1584 * @param key the key name for the parameter 1585 * @param value the String value of the parameter 1586 */ 1587 public void set(String key, String value) { 1588 if (key.indexOf('=') != -1 || key.indexOf(';') != -1) { 1589 Log.e(TAG, "Key \"" + key + "\" contains invalid character (= or ;)"); 1590 return; 1591 } 1592 if (value.indexOf('=') != -1 || value.indexOf(';') != -1) { 1593 Log.e(TAG, "Value \"" + value + "\" contains invalid character (= or ;)"); 1594 return; 1595 } 1596 1597 mMap.put(key, value); 1598 } 1599 1600 /** 1601 * Sets an integer parameter. 1602 * 1603 * @param key the key name for the parameter 1604 * @param value the int value of the parameter 1605 */ 1606 public void set(String key, int value) { 1607 mMap.put(key, Integer.toString(value)); 1608 } 1609 1610 private void set(String key, List<Area> areas) { 1611 if (areas == null) { 1612 set(key, "(0,0,0,0,0)"); 1613 } else { 1614 StringBuilder buffer = new StringBuilder(); 1615 for (int i = 0; i < areas.size(); i++) { 1616 Area area = areas.get(i); 1617 Rect rect = area.rect; 1618 buffer.append('('); 1619 buffer.append(rect.left); 1620 buffer.append(','); 1621 buffer.append(rect.top); 1622 buffer.append(','); 1623 buffer.append(rect.right); 1624 buffer.append(','); 1625 buffer.append(rect.bottom); 1626 buffer.append(','); 1627 buffer.append(area.weight); 1628 buffer.append(')'); 1629 if (i != areas.size() - 1) buffer.append(','); 1630 } 1631 set(key, buffer.toString()); 1632 } 1633 } 1634 1635 /** 1636 * Returns the value of a String parameter. 1637 * 1638 * @param key the key name for the parameter 1639 * @return the String value of the parameter 1640 */ 1641 public String get(String key) { 1642 return mMap.get(key); 1643 } 1644 1645 /** 1646 * Returns the value of an integer parameter. 1647 * 1648 * @param key the key name for the parameter 1649 * @return the int value of the parameter 1650 */ 1651 public int getInt(String key) { 1652 return Integer.parseInt(mMap.get(key)); 1653 } 1654 1655 /** 1656 * Sets the dimensions for preview pictures. If the preview has already 1657 * started, applications should stop the preview first before changing 1658 * preview size. 1659 * 1660 * The sides of width and height are based on camera orientation. That 1661 * is, the preview size is the size before it is rotated by display 1662 * orientation. So applications need to consider the display orientation 1663 * while setting preview size. For example, suppose the camera supports 1664 * both 480x320 and 320x480 preview sizes. The application wants a 3:2 1665 * preview ratio. If the display orientation is set to 0 or 180, preview 1666 * size should be set to 480x320. If the display orientation is set to 1667 * 90 or 270, preview size should be set to 320x480. The display 1668 * orientation should also be considered while setting picture size and 1669 * thumbnail size. 1670 * 1671 * @param width the width of the pictures, in pixels 1672 * @param height the height of the pictures, in pixels 1673 * @see #setDisplayOrientation(int) 1674 * @see #getCameraInfo(int, CameraInfo) 1675 * @see #setPictureSize(int, int) 1676 * @see #setJpegThumbnailSize(int, int) 1677 */ 1678 public void setPreviewSize(int width, int height) { 1679 String v = Integer.toString(width) + "x" + Integer.toString(height); 1680 set(KEY_PREVIEW_SIZE, v); 1681 } 1682 1683 /** 1684 * Returns the dimensions setting for preview pictures. 1685 * 1686 * @return a Size object with the width and height setting 1687 * for the preview picture 1688 */ 1689 public Size getPreviewSize() { 1690 String pair = get(KEY_PREVIEW_SIZE); 1691 return strToSize(pair); 1692 } 1693 1694 /** 1695 * Gets the supported preview sizes. 1696 * 1697 * @return a list of Size object. This method will always return a list 1698 * with at least one element. 1699 */ 1700 public List<Size> getSupportedPreviewSizes() { 1701 String str = get(KEY_PREVIEW_SIZE + SUPPORTED_VALUES_SUFFIX); 1702 return splitSize(str); 1703 } 1704 1705 /** 1706 * <p>Gets the supported video frame sizes that can be used by 1707 * MediaRecorder.</p> 1708 * 1709 * <p>If the returned list is not null, the returned list will contain at 1710 * least one Size and one of the sizes in the returned list must be 1711 * passed to MediaRecorder.setVideoSize() for camcorder application if 1712 * camera is used as the video source. In this case, the size of the 1713 * preview can be different from the resolution of the recorded video 1714 * during video recording.</p> 1715 * 1716 * @return a list of Size object if camera has separate preview and 1717 * video output; otherwise, null is returned. 1718 * @see #getPreferredPreviewSizeForVideo() 1719 */ 1720 public List<Size> getSupportedVideoSizes() { 1721 String str = get(KEY_VIDEO_SIZE + SUPPORTED_VALUES_SUFFIX); 1722 return splitSize(str); 1723 } 1724 1725 /** 1726 * Returns the preferred or recommended preview size (width and height) 1727 * in pixels for video recording. Camcorder applications should 1728 * set the preview size to a value that is not larger than the 1729 * preferred preview size. In other words, the product of the width 1730 * and height of the preview size should not be larger than that of 1731 * the preferred preview size. In addition, we recommend to choose a 1732 * preview size that has the same aspect ratio as the resolution of 1733 * video to be recorded. 1734 * 1735 * @return the preferred preview size (width and height) in pixels for 1736 * video recording if getSupportedVideoSizes() does not return 1737 * null; otherwise, null is returned. 1738 * @see #getSupportedVideoSizes() 1739 */ 1740 public Size getPreferredPreviewSizeForVideo() { 1741 String pair = get(KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO); 1742 return strToSize(pair); 1743 } 1744 1745 /** 1746 * <p>Sets the dimensions for EXIF thumbnail in Jpeg picture. If 1747 * applications set both width and height to 0, EXIF will not contain 1748 * thumbnail.</p> 1749 * 1750 * <p>Applications need to consider the display orientation. See {@link 1751 * #setPreviewSize(int,int)} for reference.</p> 1752 * 1753 * @param width the width of the thumbnail, in pixels 1754 * @param height the height of the thumbnail, in pixels 1755 * @see #setPreviewSize(int,int) 1756 */ 1757 public void setJpegThumbnailSize(int width, int height) { 1758 set(KEY_JPEG_THUMBNAIL_WIDTH, width); 1759 set(KEY_JPEG_THUMBNAIL_HEIGHT, height); 1760 } 1761 1762 /** 1763 * Returns the dimensions for EXIF thumbnail in Jpeg picture. 1764 * 1765 * @return a Size object with the height and width setting for the EXIF 1766 * thumbnails 1767 */ 1768 public Size getJpegThumbnailSize() { 1769 return new Size(getInt(KEY_JPEG_THUMBNAIL_WIDTH), 1770 getInt(KEY_JPEG_THUMBNAIL_HEIGHT)); 1771 } 1772 1773 /** 1774 * Gets the supported jpeg thumbnail sizes. 1775 * 1776 * @return a list of Size object. This method will always return a list 1777 * with at least two elements. Size 0,0 (no thumbnail) is always 1778 * supported. 1779 */ 1780 public List<Size> getSupportedJpegThumbnailSizes() { 1781 String str = get(KEY_JPEG_THUMBNAIL_SIZE + SUPPORTED_VALUES_SUFFIX); 1782 return splitSize(str); 1783 } 1784 1785 /** 1786 * Sets the quality of the EXIF thumbnail in Jpeg picture. 1787 * 1788 * @param quality the JPEG quality of the EXIF thumbnail. The range is 1 1789 * to 100, with 100 being the best. 1790 */ 1791 public void setJpegThumbnailQuality(int quality) { 1792 set(KEY_JPEG_THUMBNAIL_QUALITY, quality); 1793 } 1794 1795 /** 1796 * Returns the quality setting for the EXIF thumbnail in Jpeg picture. 1797 * 1798 * @return the JPEG quality setting of the EXIF thumbnail. 1799 */ 1800 public int getJpegThumbnailQuality() { 1801 return getInt(KEY_JPEG_THUMBNAIL_QUALITY); 1802 } 1803 1804 /** 1805 * Sets Jpeg quality of captured picture. 1806 * 1807 * @param quality the JPEG quality of captured picture. The range is 1 1808 * to 100, with 100 being the best. 1809 */ 1810 public void setJpegQuality(int quality) { 1811 set(KEY_JPEG_QUALITY, quality); 1812 } 1813 1814 /** 1815 * Returns the quality setting for the JPEG picture. 1816 * 1817 * @return the JPEG picture quality setting. 1818 */ 1819 public int getJpegQuality() { 1820 return getInt(KEY_JPEG_QUALITY); 1821 } 1822 1823 /** 1824 * Sets the rate at which preview frames are received. This is the 1825 * target frame rate. The actual frame rate depends on the driver. 1826 * 1827 * @param fps the frame rate (frames per second) 1828 * @deprecated replaced by {@link #setPreviewFpsRange(int,int)} 1829 */ 1830 @Deprecated 1831 public void setPreviewFrameRate(int fps) { 1832 set(KEY_PREVIEW_FRAME_RATE, fps); 1833 } 1834 1835 /** 1836 * Returns the setting for the rate at which preview frames are 1837 * received. This is the target frame rate. The actual frame rate 1838 * depends on the driver. 1839 * 1840 * @return the frame rate setting (frames per second) 1841 * @deprecated replaced by {@link #getPreviewFpsRange(int[])} 1842 */ 1843 @Deprecated 1844 public int getPreviewFrameRate() { 1845 return getInt(KEY_PREVIEW_FRAME_RATE); 1846 } 1847 1848 /** 1849 * Gets the supported preview frame rates. 1850 * 1851 * @return a list of supported preview frame rates. null if preview 1852 * frame rate setting is not supported. 1853 * @deprecated replaced by {@link #getSupportedPreviewFpsRange()} 1854 */ 1855 @Deprecated 1856 public List<Integer> getSupportedPreviewFrameRates() { 1857 String str = get(KEY_PREVIEW_FRAME_RATE + SUPPORTED_VALUES_SUFFIX); 1858 return splitInt(str); 1859 } 1860 1861 /** 1862 * Sets the maximum and maximum preview fps. This controls the rate of 1863 * preview frames received in {@link PreviewCallback}. The minimum and 1864 * maximum preview fps must be one of the elements from {@link 1865 * #getSupportedPreviewFpsRange}. 1866 * 1867 * @param min the minimum preview fps (scaled by 1000). 1868 * @param max the maximum preview fps (scaled by 1000). 1869 * @throws RuntimeException if fps range is invalid. 1870 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 1871 * @see #getSupportedPreviewFpsRange() 1872 */ 1873 public void setPreviewFpsRange(int min, int max) { 1874 set(KEY_PREVIEW_FPS_RANGE, "" + min + "," + max); 1875 } 1876 1877 /** 1878 * Returns the current minimum and maximum preview fps. The values are 1879 * one of the elements returned by {@link #getSupportedPreviewFpsRange}. 1880 * 1881 * @return range the minimum and maximum preview fps (scaled by 1000). 1882 * @see #PREVIEW_FPS_MIN_INDEX 1883 * @see #PREVIEW_FPS_MAX_INDEX 1884 * @see #getSupportedPreviewFpsRange() 1885 */ 1886 public void getPreviewFpsRange(int[] range) { 1887 if (range == null || range.length != 2) { 1888 throw new IllegalArgumentException( 1889 "range must be an array with two elements."); 1890 } 1891 splitInt(get(KEY_PREVIEW_FPS_RANGE), range); 1892 } 1893 1894 /** 1895 * Gets the supported preview fps (frame-per-second) ranges. Each range 1896 * contains a minimum fps and maximum fps. If minimum fps equals to 1897 * maximum fps, the camera outputs frames in fixed frame rate. If not, 1898 * the camera outputs frames in auto frame rate. The actual frame rate 1899 * fluctuates between the minimum and the maximum. The values are 1900 * multiplied by 1000 and represented in integers. For example, if frame 1901 * rate is 26.623 frames per second, the value is 26623. 1902 * 1903 * @return a list of supported preview fps ranges. This method returns a 1904 * list with at least one element. Every element is an int array 1905 * of two values - minimum fps and maximum fps. The list is 1906 * sorted from small to large (first by maximum fps and then 1907 * minimum fps). 1908 * @see #PREVIEW_FPS_MIN_INDEX 1909 * @see #PREVIEW_FPS_MAX_INDEX 1910 */ 1911 public List<int[]> getSupportedPreviewFpsRange() { 1912 String str = get(KEY_PREVIEW_FPS_RANGE + SUPPORTED_VALUES_SUFFIX); 1913 return splitRange(str); 1914 } 1915 1916 /** 1917 * Sets the image format for preview pictures. 1918 * <p>If this is never called, the default format will be 1919 * {@link android.graphics.ImageFormat#NV21}, which 1920 * uses the NV21 encoding format.</p> 1921 * 1922 * @param pixel_format the desired preview picture format, defined 1923 * by one of the {@link android.graphics.ImageFormat} constants. 1924 * (E.g., <var>ImageFormat.NV21</var> (default), 1925 * <var>ImageFormat.RGB_565</var>, or 1926 * <var>ImageFormat.JPEG</var>) 1927 * @see android.graphics.ImageFormat 1928 */ 1929 public void setPreviewFormat(int pixel_format) { 1930 String s = cameraFormatForPixelFormat(pixel_format); 1931 if (s == null) { 1932 throw new IllegalArgumentException( 1933 "Invalid pixel_format=" + pixel_format); 1934 } 1935 1936 set(KEY_PREVIEW_FORMAT, s); 1937 } 1938 1939 /** 1940 * Returns the image format for preview frames got from 1941 * {@link PreviewCallback}. 1942 * 1943 * @return the preview format. 1944 * @see android.graphics.ImageFormat 1945 */ 1946 public int getPreviewFormat() { 1947 return pixelFormatForCameraFormat(get(KEY_PREVIEW_FORMAT)); 1948 } 1949 1950 /** 1951 * Gets the supported preview formats. {@link android.graphics.ImageFormat#NV21} 1952 * is always supported. {@link android.graphics.ImageFormat#YV12} 1953 * is always supported since API level 12. 1954 * 1955 * @return a list of supported preview formats. This method will always 1956 * return a list with at least one element. 1957 * @see android.graphics.ImageFormat 1958 */ 1959 public List<Integer> getSupportedPreviewFormats() { 1960 String str = get(KEY_PREVIEW_FORMAT + SUPPORTED_VALUES_SUFFIX); 1961 ArrayList<Integer> formats = new ArrayList<Integer>(); 1962 for (String s : split(str)) { 1963 int f = pixelFormatForCameraFormat(s); 1964 if (f == ImageFormat.UNKNOWN) continue; 1965 formats.add(f); 1966 } 1967 return formats; 1968 } 1969 1970 /** 1971 * <p>Sets the dimensions for pictures.</p> 1972 * 1973 * <p>Applications need to consider the display orientation. See {@link 1974 * #setPreviewSize(int,int)} for reference.</p> 1975 * 1976 * @param width the width for pictures, in pixels 1977 * @param height the height for pictures, in pixels 1978 * @see #setPreviewSize(int,int) 1979 * 1980 */ 1981 public void setPictureSize(int width, int height) { 1982 String v = Integer.toString(width) + "x" + Integer.toString(height); 1983 set(KEY_PICTURE_SIZE, v); 1984 } 1985 1986 /** 1987 * Returns the dimension setting for pictures. 1988 * 1989 * @return a Size object with the height and width setting 1990 * for pictures 1991 */ 1992 public Size getPictureSize() { 1993 String pair = get(KEY_PICTURE_SIZE); 1994 return strToSize(pair); 1995 } 1996 1997 /** 1998 * Gets the supported picture sizes. 1999 * 2000 * @return a list of supported picture sizes. This method will always 2001 * return a list with at least one element. 2002 */ 2003 public List<Size> getSupportedPictureSizes() { 2004 String str = get(KEY_PICTURE_SIZE + SUPPORTED_VALUES_SUFFIX); 2005 return splitSize(str); 2006 } 2007 2008 /** 2009 * Sets the image format for pictures. 2010 * 2011 * @param pixel_format the desired picture format 2012 * (<var>ImageFormat.NV21</var>, 2013 * <var>ImageFormat.RGB_565</var>, or 2014 * <var>ImageFormat.JPEG</var>) 2015 * @see android.graphics.ImageFormat 2016 */ 2017 public void setPictureFormat(int pixel_format) { 2018 String s = cameraFormatForPixelFormat(pixel_format); 2019 if (s == null) { 2020 throw new IllegalArgumentException( 2021 "Invalid pixel_format=" + pixel_format); 2022 } 2023 2024 set(KEY_PICTURE_FORMAT, s); 2025 } 2026 2027 /** 2028 * Returns the image format for pictures. 2029 * 2030 * @return the picture format 2031 * @see android.graphics.ImageFormat 2032 */ 2033 public int getPictureFormat() { 2034 return pixelFormatForCameraFormat(get(KEY_PICTURE_FORMAT)); 2035 } 2036 2037 /** 2038 * Gets the supported picture formats. 2039 * 2040 * @return supported picture formats. This method will always return a 2041 * list with at least one element. 2042 * @see android.graphics.ImageFormat 2043 */ 2044 public List<Integer> getSupportedPictureFormats() { 2045 String str = get(KEY_PICTURE_FORMAT + SUPPORTED_VALUES_SUFFIX); 2046 ArrayList<Integer> formats = new ArrayList<Integer>(); 2047 for (String s : split(str)) { 2048 int f = pixelFormatForCameraFormat(s); 2049 if (f == ImageFormat.UNKNOWN) continue; 2050 formats.add(f); 2051 } 2052 return formats; 2053 } 2054 2055 private String cameraFormatForPixelFormat(int pixel_format) { 2056 switch(pixel_format) { 2057 case ImageFormat.NV16: return PIXEL_FORMAT_YUV422SP; 2058 case ImageFormat.NV21: return PIXEL_FORMAT_YUV420SP; 2059 case ImageFormat.YUY2: return PIXEL_FORMAT_YUV422I; 2060 case ImageFormat.YV12: return PIXEL_FORMAT_YUV420P; 2061 case ImageFormat.RGB_565: return PIXEL_FORMAT_RGB565; 2062 case ImageFormat.JPEG: return PIXEL_FORMAT_JPEG; 2063 default: return null; 2064 } 2065 } 2066 2067 private int pixelFormatForCameraFormat(String format) { 2068 if (format == null) 2069 return ImageFormat.UNKNOWN; 2070 2071 if (format.equals(PIXEL_FORMAT_YUV422SP)) 2072 return ImageFormat.NV16; 2073 2074 if (format.equals(PIXEL_FORMAT_YUV420SP)) 2075 return ImageFormat.NV21; 2076 2077 if (format.equals(PIXEL_FORMAT_YUV422I)) 2078 return ImageFormat.YUY2; 2079 2080 if (format.equals(PIXEL_FORMAT_YUV420P)) 2081 return ImageFormat.YV12; 2082 2083 if (format.equals(PIXEL_FORMAT_RGB565)) 2084 return ImageFormat.RGB_565; 2085 2086 if (format.equals(PIXEL_FORMAT_JPEG)) 2087 return ImageFormat.JPEG; 2088 2089 return ImageFormat.UNKNOWN; 2090 } 2091 2092 /** 2093 * Sets the rotation angle in degrees relative to the orientation of 2094 * the camera. This affects the pictures returned from JPEG {@link 2095 * PictureCallback}. The camera driver may set orientation in the 2096 * EXIF header without rotating the picture. Or the driver may rotate 2097 * the picture and the EXIF thumbnail. If the Jpeg picture is rotated, 2098 * the orientation in the EXIF header will be missing or 1 (row #0 is 2099 * top and column #0 is left side). 2100 * 2101 * <p>If applications want to rotate the picture to match the orientation 2102 * of what users see, apps should use {@link 2103 * android.view.OrientationEventListener} and {@link CameraInfo}. 2104 * The value from OrientationEventListener is relative to the natural 2105 * orientation of the device. CameraInfo.orientation is the angle 2106 * between camera orientation and natural device orientation. The sum 2107 * of the two is the rotation angle for back-facing camera. The 2108 * difference of the two is the rotation angle for front-facing camera. 2109 * Note that the JPEG pictures of front-facing cameras are not mirrored 2110 * as in preview display. 2111 * 2112 * <p>For example, suppose the natural orientation of the device is 2113 * portrait. The device is rotated 270 degrees clockwise, so the device 2114 * orientation is 270. Suppose a back-facing camera sensor is mounted in 2115 * landscape and the top side of the camera sensor is aligned with the 2116 * right edge of the display in natural orientation. So the camera 2117 * orientation is 90. The rotation should be set to 0 (270 + 90). 2118 * 2119 * <p>The reference code is as follows. 2120 * 2121 * <pre> 2122 * public void public void onOrientationChanged(int orientation) { 2123 * if (orientation == ORIENTATION_UNKNOWN) return; 2124 * android.hardware.Camera.CameraInfo info = 2125 * new android.hardware.Camera.CameraInfo(); 2126 * android.hardware.Camera.getCameraInfo(cameraId, info); 2127 * orientation = (orientation + 45) / 90 * 90; 2128 * int rotation = 0; 2129 * if (info.facing == CameraInfo.CAMERA_FACING_FRONT) { 2130 * rotation = (info.orientation - orientation + 360) % 360; 2131 * } else { // back-facing camera 2132 * rotation = (info.orientation + orientation) % 360; 2133 * } 2134 * mParameters.setRotation(rotation); 2135 * } 2136 * </pre> 2137 * 2138 * @param rotation The rotation angle in degrees relative to the 2139 * orientation of the camera. Rotation can only be 0, 2140 * 90, 180 or 270. 2141 * @throws IllegalArgumentException if rotation value is invalid. 2142 * @see android.view.OrientationEventListener 2143 * @see #getCameraInfo(int, CameraInfo) 2144 */ 2145 public void setRotation(int rotation) { 2146 if (rotation == 0 || rotation == 90 || rotation == 180 2147 || rotation == 270) { 2148 set(KEY_ROTATION, Integer.toString(rotation)); 2149 } else { 2150 throw new IllegalArgumentException( 2151 "Invalid rotation=" + rotation); 2152 } 2153 } 2154 2155 /** 2156 * Sets GPS latitude coordinate. This will be stored in JPEG EXIF 2157 * header. 2158 * 2159 * @param latitude GPS latitude coordinate. 2160 */ 2161 public void setGpsLatitude(double latitude) { 2162 set(KEY_GPS_LATITUDE, Double.toString(latitude)); 2163 } 2164 2165 /** 2166 * Sets GPS longitude coordinate. This will be stored in JPEG EXIF 2167 * header. 2168 * 2169 * @param longitude GPS longitude coordinate. 2170 */ 2171 public void setGpsLongitude(double longitude) { 2172 set(KEY_GPS_LONGITUDE, Double.toString(longitude)); 2173 } 2174 2175 /** 2176 * Sets GPS altitude. This will be stored in JPEG EXIF header. 2177 * 2178 * @param altitude GPS altitude in meters. 2179 */ 2180 public void setGpsAltitude(double altitude) { 2181 set(KEY_GPS_ALTITUDE, Double.toString(altitude)); 2182 } 2183 2184 /** 2185 * Sets GPS timestamp. This will be stored in JPEG EXIF header. 2186 * 2187 * @param timestamp GPS timestamp (UTC in seconds since January 1, 2188 * 1970). 2189 */ 2190 public void setGpsTimestamp(long timestamp) { 2191 set(KEY_GPS_TIMESTAMP, Long.toString(timestamp)); 2192 } 2193 2194 /** 2195 * Sets GPS processing method. It will store up to 32 characters 2196 * in JPEG EXIF header. 2197 * 2198 * @param processing_method The processing method to get this location. 2199 */ 2200 public void setGpsProcessingMethod(String processing_method) { 2201 set(KEY_GPS_PROCESSING_METHOD, processing_method); 2202 } 2203 2204 /** 2205 * Removes GPS latitude, longitude, altitude, and timestamp from the 2206 * parameters. 2207 */ 2208 public void removeGpsData() { 2209 remove(KEY_GPS_LATITUDE); 2210 remove(KEY_GPS_LONGITUDE); 2211 remove(KEY_GPS_ALTITUDE); 2212 remove(KEY_GPS_TIMESTAMP); 2213 remove(KEY_GPS_PROCESSING_METHOD); 2214 } 2215 2216 /** 2217 * Gets the current white balance setting. 2218 * 2219 * @return current white balance. null if white balance setting is not 2220 * supported. 2221 * @see #WHITE_BALANCE_AUTO 2222 * @see #WHITE_BALANCE_INCANDESCENT 2223 * @see #WHITE_BALANCE_FLUORESCENT 2224 * @see #WHITE_BALANCE_WARM_FLUORESCENT 2225 * @see #WHITE_BALANCE_DAYLIGHT 2226 * @see #WHITE_BALANCE_CLOUDY_DAYLIGHT 2227 * @see #WHITE_BALANCE_TWILIGHT 2228 * @see #WHITE_BALANCE_SHADE 2229 * 2230 */ 2231 public String getWhiteBalance() { 2232 return get(KEY_WHITE_BALANCE); 2233 } 2234 2235 /** 2236 * Sets the white balance. 2237 * 2238 * @param value new white balance. 2239 * @see #getWhiteBalance() 2240 */ 2241 public void setWhiteBalance(String value) { 2242 set(KEY_WHITE_BALANCE, value); 2243 } 2244 2245 /** 2246 * Gets the supported white balance. 2247 * 2248 * @return a list of supported white balance. null if white balance 2249 * setting is not supported. 2250 * @see #getWhiteBalance() 2251 */ 2252 public List<String> getSupportedWhiteBalance() { 2253 String str = get(KEY_WHITE_BALANCE + SUPPORTED_VALUES_SUFFIX); 2254 return split(str); 2255 } 2256 2257 /** 2258 * Gets the current color effect setting. 2259 * 2260 * @return current color effect. null if color effect 2261 * setting is not supported. 2262 * @see #EFFECT_NONE 2263 * @see #EFFECT_MONO 2264 * @see #EFFECT_NEGATIVE 2265 * @see #EFFECT_SOLARIZE 2266 * @see #EFFECT_SEPIA 2267 * @see #EFFECT_POSTERIZE 2268 * @see #EFFECT_WHITEBOARD 2269 * @see #EFFECT_BLACKBOARD 2270 * @see #EFFECT_AQUA 2271 */ 2272 public String getColorEffect() { 2273 return get(KEY_EFFECT); 2274 } 2275 2276 /** 2277 * Sets the current color effect setting. 2278 * 2279 * @param value new color effect. 2280 * @see #getColorEffect() 2281 */ 2282 public void setColorEffect(String value) { 2283 set(KEY_EFFECT, value); 2284 } 2285 2286 /** 2287 * Gets the supported color effects. 2288 * 2289 * @return a list of supported color effects. null if color effect 2290 * setting is not supported. 2291 * @see #getColorEffect() 2292 */ 2293 public List<String> getSupportedColorEffects() { 2294 String str = get(KEY_EFFECT + SUPPORTED_VALUES_SUFFIX); 2295 return split(str); 2296 } 2297 2298 2299 /** 2300 * Gets the current antibanding setting. 2301 * 2302 * @return current antibanding. null if antibanding setting is not 2303 * supported. 2304 * @see #ANTIBANDING_AUTO 2305 * @see #ANTIBANDING_50HZ 2306 * @see #ANTIBANDING_60HZ 2307 * @see #ANTIBANDING_OFF 2308 */ 2309 public String getAntibanding() { 2310 return get(KEY_ANTIBANDING); 2311 } 2312 2313 /** 2314 * Sets the antibanding. 2315 * 2316 * @param antibanding new antibanding value. 2317 * @see #getAntibanding() 2318 */ 2319 public void setAntibanding(String antibanding) { 2320 set(KEY_ANTIBANDING, antibanding); 2321 } 2322 2323 /** 2324 * Gets the supported antibanding values. 2325 * 2326 * @return a list of supported antibanding values. null if antibanding 2327 * setting is not supported. 2328 * @see #getAntibanding() 2329 */ 2330 public List<String> getSupportedAntibanding() { 2331 String str = get(KEY_ANTIBANDING + SUPPORTED_VALUES_SUFFIX); 2332 return split(str); 2333 } 2334 2335 /** 2336 * Gets the current scene mode setting. 2337 * 2338 * @return one of SCENE_MODE_XXX string constant. null if scene mode 2339 * setting is not supported. 2340 * @see #SCENE_MODE_AUTO 2341 * @see #SCENE_MODE_ACTION 2342 * @see #SCENE_MODE_PORTRAIT 2343 * @see #SCENE_MODE_LANDSCAPE 2344 * @see #SCENE_MODE_NIGHT 2345 * @see #SCENE_MODE_NIGHT_PORTRAIT 2346 * @see #SCENE_MODE_THEATRE 2347 * @see #SCENE_MODE_BEACH 2348 * @see #SCENE_MODE_SNOW 2349 * @see #SCENE_MODE_SUNSET 2350 * @see #SCENE_MODE_STEADYPHOTO 2351 * @see #SCENE_MODE_FIREWORKS 2352 * @see #SCENE_MODE_SPORTS 2353 * @see #SCENE_MODE_PARTY 2354 * @see #SCENE_MODE_CANDLELIGHT 2355 */ 2356 public String getSceneMode() { 2357 return get(KEY_SCENE_MODE); 2358 } 2359 2360 /** 2361 * Sets the scene mode. Changing scene mode may override other 2362 * parameters (such as flash mode, focus mode, white balance). For 2363 * example, suppose originally flash mode is on and supported flash 2364 * modes are on/off. In night scene mode, both flash mode and supported 2365 * flash mode may be changed to off. After setting scene mode, 2366 * applications should call getParameters to know if some parameters are 2367 * changed. 2368 * 2369 * @param value scene mode. 2370 * @see #getSceneMode() 2371 */ 2372 public void setSceneMode(String value) { 2373 set(KEY_SCENE_MODE, value); 2374 } 2375 2376 /** 2377 * Gets the supported scene modes. 2378 * 2379 * @return a list of supported scene modes. null if scene mode setting 2380 * is not supported. 2381 * @see #getSceneMode() 2382 */ 2383 public List<String> getSupportedSceneModes() { 2384 String str = get(KEY_SCENE_MODE + SUPPORTED_VALUES_SUFFIX); 2385 return split(str); 2386 } 2387 2388 /** 2389 * Gets the current flash mode setting. 2390 * 2391 * @return current flash mode. null if flash mode setting is not 2392 * supported. 2393 * @see #FLASH_MODE_OFF 2394 * @see #FLASH_MODE_AUTO 2395 * @see #FLASH_MODE_ON 2396 * @see #FLASH_MODE_RED_EYE 2397 * @see #FLASH_MODE_TORCH 2398 */ 2399 public String getFlashMode() { 2400 return get(KEY_FLASH_MODE); 2401 } 2402 2403 /** 2404 * Sets the flash mode. 2405 * 2406 * @param value flash mode. 2407 * @see #getFlashMode() 2408 */ 2409 public void setFlashMode(String value) { 2410 set(KEY_FLASH_MODE, value); 2411 } 2412 2413 /** 2414 * Gets the supported flash modes. 2415 * 2416 * @return a list of supported flash modes. null if flash mode setting 2417 * is not supported. 2418 * @see #getFlashMode() 2419 */ 2420 public List<String> getSupportedFlashModes() { 2421 String str = get(KEY_FLASH_MODE + SUPPORTED_VALUES_SUFFIX); 2422 return split(str); 2423 } 2424 2425 /** 2426 * Gets the current focus mode setting. 2427 * 2428 * @return current focus mode. This method will always return a non-null 2429 * value. Applications should call {@link 2430 * #autoFocus(AutoFocusCallback)} to start the focus if focus 2431 * mode is FOCUS_MODE_AUTO or FOCUS_MODE_MACRO. 2432 * @see #FOCUS_MODE_AUTO 2433 * @see #FOCUS_MODE_INFINITY 2434 * @see #FOCUS_MODE_MACRO 2435 * @see #FOCUS_MODE_FIXED 2436 * @see #FOCUS_MODE_EDOF 2437 * @see #FOCUS_MODE_CONTINUOUS_VIDEO 2438 */ 2439 public String getFocusMode() { 2440 return get(KEY_FOCUS_MODE); 2441 } 2442 2443 /** 2444 * Sets the focus mode. 2445 * 2446 * @param value focus mode. 2447 * @see #getFocusMode() 2448 */ 2449 public void setFocusMode(String value) { 2450 set(KEY_FOCUS_MODE, value); 2451 } 2452 2453 /** 2454 * Gets the supported focus modes. 2455 * 2456 * @return a list of supported focus modes. This method will always 2457 * return a list with at least one element. 2458 * @see #getFocusMode() 2459 */ 2460 public List<String> getSupportedFocusModes() { 2461 String str = get(KEY_FOCUS_MODE + SUPPORTED_VALUES_SUFFIX); 2462 return split(str); 2463 } 2464 2465 /** 2466 * Gets the focal length (in millimeter) of the camera. 2467 * 2468 * @return the focal length. This method will always return a valid 2469 * value. 2470 */ 2471 public float getFocalLength() { 2472 return Float.parseFloat(get(KEY_FOCAL_LENGTH)); 2473 } 2474 2475 /** 2476 * Gets the horizontal angle of view in degrees. 2477 * 2478 * @return horizontal angle of view. This method will always return a 2479 * valid value. 2480 */ 2481 public float getHorizontalViewAngle() { 2482 return Float.parseFloat(get(KEY_HORIZONTAL_VIEW_ANGLE)); 2483 } 2484 2485 /** 2486 * Gets the vertical angle of view in degrees. 2487 * 2488 * @return vertical angle of view. This method will always return a 2489 * valid value. 2490 */ 2491 public float getVerticalViewAngle() { 2492 return Float.parseFloat(get(KEY_VERTICAL_VIEW_ANGLE)); 2493 } 2494 2495 /** 2496 * Gets the current exposure compensation index. 2497 * 2498 * @return current exposure compensation index. The range is {@link 2499 * #getMinExposureCompensation} to {@link 2500 * #getMaxExposureCompensation}. 0 means exposure is not 2501 * adjusted. 2502 */ 2503 public int getExposureCompensation() { 2504 return getInt(KEY_EXPOSURE_COMPENSATION, 0); 2505 } 2506 2507 /** 2508 * Sets the exposure compensation index. 2509 * 2510 * @param value exposure compensation index. The valid value range is 2511 * from {@link #getMinExposureCompensation} (inclusive) to {@link 2512 * #getMaxExposureCompensation} (inclusive). 0 means exposure is 2513 * not adjusted. Application should call 2514 * getMinExposureCompensation and getMaxExposureCompensation to 2515 * know if exposure compensation is supported. 2516 */ 2517 public void setExposureCompensation(int value) { 2518 set(KEY_EXPOSURE_COMPENSATION, value); 2519 } 2520 2521 /** 2522 * Gets the maximum exposure compensation index. 2523 * 2524 * @return maximum exposure compensation index (>=0). If both this 2525 * method and {@link #getMinExposureCompensation} return 0, 2526 * exposure compensation is not supported. 2527 */ 2528 public int getMaxExposureCompensation() { 2529 return getInt(KEY_MAX_EXPOSURE_COMPENSATION, 0); 2530 } 2531 2532 /** 2533 * Gets the minimum exposure compensation index. 2534 * 2535 * @return minimum exposure compensation index (<=0). If both this 2536 * method and {@link #getMaxExposureCompensation} return 0, 2537 * exposure compensation is not supported. 2538 */ 2539 public int getMinExposureCompensation() { 2540 return getInt(KEY_MIN_EXPOSURE_COMPENSATION, 0); 2541 } 2542 2543 /** 2544 * Gets the exposure compensation step. 2545 * 2546 * @return exposure compensation step. Applications can get EV by 2547 * multiplying the exposure compensation index and step. Ex: if 2548 * exposure compensation index is -6 and step is 0.333333333, EV 2549 * is -2. 2550 */ 2551 public float getExposureCompensationStep() { 2552 return getFloat(KEY_EXPOSURE_COMPENSATION_STEP, 0); 2553 } 2554 2555 /** 2556 * <p>Sets the auto-exposure lock state. Applications should check 2557 * {@link #isAutoExposureLockSupported} before using this method.</p> 2558 * 2559 * <p>If set to true, the camera auto-exposure routine will immediately 2560 * pause until the lock is set to false. Exposure compensation settings 2561 * changes will still take effect while auto-exposure is locked.</p> 2562 * 2563 * <p>If auto-exposure is already locked, setting this to true again has 2564 * no effect (the driver will not recalculate exposure values).</p> 2565 * 2566 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 2567 * image capture with {@link #takePicture(Camera.ShutterCallback, 2568 * Camera.PictureCallback, Camera.PictureCallback)}, will automatically 2569 * set the lock to false. However, the lock can be re-enabled before 2570 * preview is re-started to keep the same AE parameters.</p> 2571 * 2572 * <p>Exposure compensation, in conjunction with re-enabling the AE and 2573 * AWB locks after each still capture, can be used to capture an 2574 * exposure-bracketed burst of images, for example.</p> 2575 * 2576 * <p>Auto-exposure state, including the lock state, will not be 2577 * maintained after camera {@link #release()} is called. Locking 2578 * auto-exposure after {@link #open()} but before the first call to 2579 * {@link #startPreview()} will not allow the auto-exposure routine to 2580 * run at all, and may result in severely over- or under-exposed 2581 * images.</p> 2582 * 2583 * <p>The driver may also independently lock auto-exposure after 2584 * auto-focus completes. If this is undesirable, be sure to always set 2585 * the auto-exposure lock to false after the 2586 * {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} callback is 2587 * received. The {@link #getAutoExposureLock()} method can be used after 2588 * the callback to determine if the camera has locked auto-exposure 2589 * independently.</p> 2590 * 2591 * @param toggle new state of the auto-exposure lock. True means that 2592 * auto-exposure is locked, false means that the auto-exposure 2593 * routine is free to run normally. 2594 * 2595 * @see #getAutoExposureLock() 2596 */ 2597 public void setAutoExposureLock(boolean toggle) { 2598 set(KEY_AUTO_EXPOSURE_LOCK, toggle ? TRUE : FALSE); 2599 } 2600 2601 /** 2602 * Gets the state of the auto-exposure lock. Applications should check 2603 * {@link #isAutoExposureLockSupported} before using this method. See 2604 * {@link #setAutoExposureLock} for details about the lock. 2605 * 2606 * @return State of the auto-exposure lock. Returns true if 2607 * auto-exposure is currently locked, and false otherwise. The 2608 * auto-exposure lock may be independently enabled by the camera 2609 * subsystem when auto-focus has completed. This method can be 2610 * used after the {@link AutoFocusCallback#onAutoFocus(boolean, 2611 * Camera)} callback to determine if the camera has locked AE. 2612 * 2613 * @see #setAutoExposureLock(boolean) 2614 * 2615 */ 2616 public boolean getAutoExposureLock() { 2617 String str = get(KEY_AUTO_EXPOSURE_LOCK); 2618 return TRUE.equals(str); 2619 } 2620 2621 /** 2622 * Returns true if auto-exposure locking is supported. Applications 2623 * should call this before trying to lock auto-exposure. See 2624 * {@link #setAutoExposureLock} for details about the lock. 2625 * 2626 * @return true if auto-exposure lock is supported. 2627 * @see #setAutoExposureLock(boolean) 2628 * 2629 */ 2630 public boolean isAutoExposureLockSupported() { 2631 String str = get(KEY_AUTO_EXPOSURE_LOCK_SUPPORTED); 2632 return TRUE.equals(str); 2633 } 2634 2635 /** 2636 * <p>Sets the auto-white balance lock state. Applications should check 2637 * {@link #isAutoWhiteBalanceLockSupported} before using this 2638 * method.</p> 2639 * 2640 * <p>If set to true, the camera auto-white balance routine will 2641 * immediately pause until the lock is set to false.</p> 2642 * 2643 * <p>If auto-white balance is already locked, setting this to true 2644 * again has no effect (the driver will not recalculate white balance 2645 * values).</p> 2646 * 2647 * <p>Stopping preview with {@link #stopPreview()}, or triggering still 2648 * image capture with {@link #takePicture(Camera.ShutterCallback, 2649 * Camera.PictureCallback, Camera.PictureCallback)}, will automatically 2650 * set the lock to false. However, the lock can be re-enabled before 2651 * preview is re-started to keep the same white balance parameters.</p> 2652 * 2653 * <p>Exposure compensation, in conjunction with re-enabling the AE and 2654 * AWB locks after each still capture, can be used to capture an 2655 * exposure-bracketed burst of images, for example. Auto-white balance 2656 * state, including the lock state, will not be maintained after camera 2657 * {@link #release()} is called. Locking auto-white balance after 2658 * {@link #open()} but before the first call to {@link #startPreview()} 2659 * will not allow the auto-white balance routine to run at all, and may 2660 * result in severely incorrect color in captured images.</p> 2661 * 2662 * <p>The driver may also independently lock auto-white balance after 2663 * auto-focus completes. If this is undesirable, be sure to always set 2664 * the auto-white balance lock to false after the 2665 * {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} callback is 2666 * received. The {@link #getAutoWhiteBalanceLock()} method can be used 2667 * after the callback to determine if the camera has locked auto-white 2668 * balance independently.</p> 2669 * 2670 * @param toggle new state of the auto-white balance lock. True means 2671 * that auto-white balance is locked, false means that the 2672 * auto-white balance routine is free to run normally. 2673 * 2674 * @see #getAutoWhiteBalanceLock() 2675 */ 2676 public void setAutoWhiteBalanceLock(boolean toggle) { 2677 set(KEY_AUTO_WHITEBALANCE_LOCK, toggle ? TRUE : FALSE); 2678 } 2679 2680 /** 2681 * Gets the state of the auto-white balance lock. Applications should 2682 * check {@link #isAutoWhiteBalanceLockSupported} before using this 2683 * method. See {@link #setAutoWhiteBalanceLock} for details about the 2684 * lock. 2685 * 2686 * @return State of the auto-white balance lock. Returns true if 2687 * auto-white balance is currently locked, and false 2688 * otherwise. The auto-white balance lock may be independently 2689 * enabled by the camera subsystem when auto-focus has 2690 * completed. This method can be used after the 2691 * {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} 2692 * callback to determine if the camera has locked AWB. 2693 * 2694 * @see #setAutoWhiteBalanceLock(boolean) 2695 * 2696 */ 2697 public boolean getAutoWhiteBalanceLock() { 2698 String str = get(KEY_AUTO_WHITEBALANCE_LOCK); 2699 return TRUE.equals(str); 2700 } 2701 2702 /** 2703 * Returns true if auto-white balance locking is supported. Applications 2704 * should call this before trying to lock auto-white balance. See 2705 * {@link #setAutoWhiteBalanceLock} for details about the lock. 2706 * 2707 * @return true if auto-white balance lock is supported. 2708 * @see #setAutoWhiteBalanceLock(boolean) 2709 * 2710 */ 2711 public boolean isAutoWhiteBalanceLockSupported() { 2712 String str = get(KEY_AUTO_WHITEBALANCE_LOCK_SUPPORTED); 2713 return TRUE.equals(str); 2714 } 2715 2716 /** 2717 * Gets current zoom value. This also works when smooth zoom is in 2718 * progress. Applications should check {@link #isZoomSupported} before 2719 * using this method. 2720 * 2721 * @return the current zoom value. The range is 0 to {@link 2722 * #getMaxZoom}. 0 means the camera is not zoomed. 2723 */ 2724 public int getZoom() { 2725 return getInt(KEY_ZOOM, 0); 2726 } 2727 2728 /** 2729 * Sets current zoom value. If the camera is zoomed (value > 0), the 2730 * actual picture size may be smaller than picture size setting. 2731 * Applications can check the actual picture size after picture is 2732 * returned from {@link PictureCallback}. The preview size remains the 2733 * same in zoom. Applications should check {@link #isZoomSupported} 2734 * before using this method. 2735 * 2736 * @param value zoom value. The valid range is 0 to {@link #getMaxZoom}. 2737 */ 2738 public void setZoom(int value) { 2739 set(KEY_ZOOM, value); 2740 } 2741 2742 /** 2743 * Returns true if zoom is supported. Applications should call this 2744 * before using other zoom methods. 2745 * 2746 * @return true if zoom is supported. 2747 */ 2748 public boolean isZoomSupported() { 2749 String str = get(KEY_ZOOM_SUPPORTED); 2750 return TRUE.equals(str); 2751 } 2752 2753 /** 2754 * Gets the maximum zoom value allowed for snapshot. This is the maximum 2755 * value that applications can set to {@link #setZoom(int)}. 2756 * Applications should call {@link #isZoomSupported} before using this 2757 * method. This value may change in different preview size. Applications 2758 * should call this again after setting preview size. 2759 * 2760 * @return the maximum zoom value supported by the camera. 2761 */ 2762 public int getMaxZoom() { 2763 return getInt(KEY_MAX_ZOOM, 0); 2764 } 2765 2766 /** 2767 * Gets the zoom ratios of all zoom values. Applications should check 2768 * {@link #isZoomSupported} before using this method. 2769 * 2770 * @return the zoom ratios in 1/100 increments. Ex: a zoom of 3.2x is 2771 * returned as 320. The number of elements is {@link 2772 * #getMaxZoom} + 1. The list is sorted from small to large. The 2773 * first element is always 100. The last element is the zoom 2774 * ratio of the maximum zoom value. 2775 */ 2776 public List<Integer> getZoomRatios() { 2777 return splitInt(get(KEY_ZOOM_RATIOS)); 2778 } 2779 2780 /** 2781 * Returns true if smooth zoom is supported. Applications should call 2782 * this before using other smooth zoom methods. 2783 * 2784 * @return true if smooth zoom is supported. 2785 */ 2786 public boolean isSmoothZoomSupported() { 2787 String str = get(KEY_SMOOTH_ZOOM_SUPPORTED); 2788 return TRUE.equals(str); 2789 } 2790 2791 /** 2792 * <p>Gets the distances from the camera to where an object appears to be 2793 * in focus. The object is sharpest at the optimal focus distance. The 2794 * depth of field is the far focus distance minus near focus distance.</p> 2795 * 2796 * <p>Focus distances may change after calling {@link 2797 * #autoFocus(AutoFocusCallback)}, {@link #cancelAutoFocus}, or {@link 2798 * #startPreview()}. Applications can call {@link #getParameters()} 2799 * and this method anytime to get the latest focus distances. If the 2800 * focus mode is FOCUS_MODE_CONTINUOUS_VIDEO, focus distances may change 2801 * from time to time.</p> 2802 * 2803 * <p>This method is intended to estimate the distance between the camera 2804 * and the subject. After autofocus, the subject distance may be within 2805 * near and far focus distance. However, the precision depends on the 2806 * camera hardware, autofocus algorithm, the focus area, and the scene. 2807 * The error can be large and it should be only used as a reference.</p> 2808 * 2809 * <p>Far focus distance >= optimal focus distance >= near focus distance. 2810 * If the focus distance is infinity, the value will be 2811 * {@code Float.POSITIVE_INFINITY}.</p> 2812 * 2813 * @param output focus distances in meters. output must be a float 2814 * array with three elements. Near focus distance, optimal focus 2815 * distance, and far focus distance will be filled in the array. 2816 * @see #FOCUS_DISTANCE_NEAR_INDEX 2817 * @see #FOCUS_DISTANCE_OPTIMAL_INDEX 2818 * @see #FOCUS_DISTANCE_FAR_INDEX 2819 */ 2820 public void getFocusDistances(float[] output) { 2821 if (output == null || output.length != 3) { 2822 throw new IllegalArgumentException( 2823 "output must be an float array with three elements."); 2824 } 2825 splitFloat(get(KEY_FOCUS_DISTANCES), output); 2826 } 2827 2828 /** 2829 * Gets the maximum number of focus areas supported. This is the maximum 2830 * length of the list in {@link #setFocusAreas(List)} and 2831 * {@link #getFocusAreas()}. 2832 * 2833 * @return the maximum number of focus areas supported by the camera. 2834 * @see #getFocusAreas() 2835 */ 2836 public int getMaxNumFocusAreas() { 2837 return getInt(KEY_MAX_NUM_FOCUS_AREAS, 0); 2838 } 2839 2840 /** 2841 * <p>Gets the current focus areas. Camera driver uses the areas to decide 2842 * focus.</p> 2843 * 2844 * <p>Before using this API or {@link #setFocusAreas(List)}, apps should 2845 * call {@link #getMaxNumFocusAreas()} to know the maximum number of 2846 * focus areas first. If the value is 0, focus area is not supported.</p> 2847 * 2848 * <p>Each focus area is a rectangle with specified weight. The direction 2849 * is relative to the sensor orientation, that is, what the sensor sees. 2850 * The direction is not affected by the rotation or mirroring of 2851 * {@link #setDisplayOrientation(int)}. Coordinates of the rectangle 2852 * range from -1000 to 1000. (-1000, -1000) is the upper left point. 2853 * (1000, 1000) is the lower right point. The width and height of focus 2854 * areas cannot be 0 or negative.</p> 2855 * 2856 * <p>The weight must range from 1 to 1000. The weight should be 2857 * interpreted as a per-pixel weight - all pixels in the area have the 2858 * specified weight. This means a small area with the same weight as a 2859 * larger area will have less influence on the focusing than the larger 2860 * area. Focus areas can partially overlap and the driver will add the 2861 * weights in the overlap region.</p> 2862 * 2863 * <p>A special case of a {@code null} focus area list means the driver is 2864 * free to select focus targets as it wants. For example, the driver may 2865 * use more signals to select focus areas and change them 2866 * dynamically. Apps can set the focus area list to {@code null} if they 2867 * want the driver to completely control focusing.</p> 2868 * 2869 * <p>Focus areas are relative to the current field of view 2870 * ({@link #getZoom()}). No matter what the zoom level is, (-1000,-1000) 2871 * represents the top of the currently visible camera frame. The focus 2872 * area cannot be set to be outside the current field of view, even 2873 * when using zoom.</p> 2874 * 2875 * <p>Focus area only has effect if the current focus mode is 2876 * {@link #FOCUS_MODE_AUTO}, {@link #FOCUS_MODE_MACRO}, or 2877 * {@link #FOCUS_MODE_CONTINUOUS_VIDEO}.</p> 2878 * 2879 * @return a list of current focus areas 2880 */ 2881 public List<Area> getFocusAreas() { 2882 return splitArea(get(KEY_FOCUS_AREAS)); 2883 } 2884 2885 /** 2886 * Sets focus areas. See {@link #getFocusAreas()} for documentation. 2887 * 2888 * @param focusAreas the focus areas 2889 * @see #getFocusAreas() 2890 */ 2891 public void setFocusAreas(List<Area> focusAreas) { 2892 set(KEY_FOCUS_AREAS, focusAreas); 2893 } 2894 2895 /** 2896 * Gets the maximum number of metering areas supported. This is the 2897 * maximum length of the list in {@link #setMeteringAreas(List)} and 2898 * {@link #getMeteringAreas()}. 2899 * 2900 * @return the maximum number of metering areas supported by the camera. 2901 * @see #getMeteringAreas() 2902 */ 2903 public int getMaxNumMeteringAreas() { 2904 return getInt(KEY_MAX_NUM_METERING_AREAS, 0); 2905 } 2906 2907 /** 2908 * <p>Gets the current metering areas. Camera driver uses these areas to 2909 * decide exposure.</p> 2910 * 2911 * <p>Before using this API or {@link #setMeteringAreas(List)}, apps should 2912 * call {@link #getMaxNumMeteringAreas()} to know the maximum number of 2913 * metering areas first. If the value is 0, metering area is not 2914 * supported.</p> 2915 * 2916 * <p>Each metering area is a rectangle with specified weight. The 2917 * direction is relative to the sensor orientation, that is, what the 2918 * sensor sees. The direction is not affected by the rotation or 2919 * mirroring of {@link #setDisplayOrientation(int)}. Coordinates of the 2920 * rectangle range from -1000 to 1000. (-1000, -1000) is the upper left 2921 * point. (1000, 1000) is the lower right point. The width and height of 2922 * metering areas cannot be 0 or negative.</p> 2923 * 2924 * <p>The weight must range from 1 to 1000, and represents a weight for 2925 * every pixel in the area. This means that a large metering area with 2926 * the same weight as a smaller area will have more effect in the 2927 * metering result. Metering areas can partially overlap and the driver 2928 * will add the weights in the overlap region.</p> 2929 * 2930 * <p>A special case of a {@code null} metering area list means the driver 2931 * is free to meter as it chooses. For example, the driver may use more 2932 * signals to select metering areas and change them dynamically. Apps 2933 * can set the metering area list to {@code null} if they want the 2934 * driver to completely control metering.</p> 2935 * 2936 * <p>Metering areas are relative to the current field of view 2937 * ({@link #getZoom()}). No matter what the zoom level is, (-1000,-1000) 2938 * represents the top of the currently visible camera frame. The 2939 * metering area cannot be set to be outside the current field of view, 2940 * even when using zoom.</p> 2941 * 2942 * <p>No matter what metering areas are, the final exposure are compensated 2943 * by {@link #setExposureCompensation(int)}.</p> 2944 * 2945 * @return a list of current metering areas 2946 */ 2947 public List<Area> getMeteringAreas() { 2948 return splitArea(get(KEY_METERING_AREAS)); 2949 } 2950 2951 /** 2952 * Sets metering areas. See {@link #getMeteringAreas()} for 2953 * documentation. 2954 * 2955 * @param meteringAreas the metering areas 2956 * @see #getMeteringAreas() 2957 */ 2958 public void setMeteringAreas(List<Area> meteringAreas) { 2959 set(KEY_METERING_AREAS, meteringAreas); 2960 } 2961 2962 // Splits a comma delimited string to an ArrayList of String. 2963 // Return null if the passing string is null or the size is 0. 2964 private ArrayList<String> split(String str) { 2965 if (str == null) return null; 2966 2967 // Use StringTokenizer because it is faster than split. 2968 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2969 ArrayList<String> substrings = new ArrayList<String>(); 2970 while (tokenizer.hasMoreElements()) { 2971 substrings.add(tokenizer.nextToken()); 2972 } 2973 return substrings; 2974 } 2975 2976 // Splits a comma delimited string to an ArrayList of Integer. 2977 // Return null if the passing string is null or the size is 0. 2978 private ArrayList<Integer> splitInt(String str) { 2979 if (str == null) return null; 2980 2981 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2982 ArrayList<Integer> substrings = new ArrayList<Integer>(); 2983 while (tokenizer.hasMoreElements()) { 2984 String token = tokenizer.nextToken(); 2985 substrings.add(Integer.parseInt(token)); 2986 } 2987 if (substrings.size() == 0) return null; 2988 return substrings; 2989 } 2990 2991 private void splitInt(String str, int[] output) { 2992 if (str == null) return; 2993 2994 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2995 int index = 0; 2996 while (tokenizer.hasMoreElements()) { 2997 String token = tokenizer.nextToken(); 2998 output[index++] = Integer.parseInt(token); 2999 } 3000 } 3001 3002 // Splits a comma delimited string to an ArrayList of Float. 3003 private void splitFloat(String str, float[] output) { 3004 if (str == null) return; 3005 3006 StringTokenizer tokenizer = new StringTokenizer(str, ","); 3007 int index = 0; 3008 while (tokenizer.hasMoreElements()) { 3009 String token = tokenizer.nextToken(); 3010 output[index++] = Float.parseFloat(token); 3011 } 3012 } 3013 3014 // Returns the value of a float parameter. 3015 private float getFloat(String key, float defaultValue) { 3016 try { 3017 return Float.parseFloat(mMap.get(key)); 3018 } catch (NumberFormatException ex) { 3019 return defaultValue; 3020 } 3021 } 3022 3023 // Returns the value of a integer parameter. 3024 private int getInt(String key, int defaultValue) { 3025 try { 3026 return Integer.parseInt(mMap.get(key)); 3027 } catch (NumberFormatException ex) { 3028 return defaultValue; 3029 } 3030 } 3031 3032 // Splits a comma delimited string to an ArrayList of Size. 3033 // Return null if the passing string is null or the size is 0. 3034 private ArrayList<Size> splitSize(String str) { 3035 if (str == null) return null; 3036 3037 StringTokenizer tokenizer = new StringTokenizer(str, ","); 3038 ArrayList<Size> sizeList = new ArrayList<Size>(); 3039 while (tokenizer.hasMoreElements()) { 3040 Size size = strToSize(tokenizer.nextToken()); 3041 if (size != null) sizeList.add(size); 3042 } 3043 if (sizeList.size() == 0) return null; 3044 return sizeList; 3045 } 3046 3047 // Parses a string (ex: "480x320") to Size object. 3048 // Return null if the passing string is null. 3049 private Size strToSize(String str) { 3050 if (str == null) return null; 3051 3052 int pos = str.indexOf('x'); 3053 if (pos != -1) { 3054 String width = str.substring(0, pos); 3055 String height = str.substring(pos + 1); 3056 return new Size(Integer.parseInt(width), 3057 Integer.parseInt(height)); 3058 } 3059 Log.e(TAG, "Invalid size parameter string=" + str); 3060 return null; 3061 } 3062 3063 // Splits a comma delimited string to an ArrayList of int array. 3064 // Example string: "(10000,26623),(10000,30000)". Return null if the 3065 // passing string is null or the size is 0. 3066 private ArrayList<int[]> splitRange(String str) { 3067 if (str == null || str.charAt(0) != '(' 3068 || str.charAt(str.length() - 1) != ')') { 3069 Log.e(TAG, "Invalid range list string=" + str); 3070 return null; 3071 } 3072 3073 ArrayList<int[]> rangeList = new ArrayList<int[]>(); 3074 int endIndex, fromIndex = 1; 3075 do { 3076 int[] range = new int[2]; 3077 endIndex = str.indexOf("),(", fromIndex); 3078 if (endIndex == -1) endIndex = str.length() - 1; 3079 splitInt(str.substring(fromIndex, endIndex), range); 3080 rangeList.add(range); 3081 fromIndex = endIndex + 3; 3082 } while (endIndex != str.length() - 1); 3083 3084 if (rangeList.size() == 0) return null; 3085 return rangeList; 3086 } 3087 3088 // Splits a comma delimited string to an ArrayList of Area objects. 3089 // Example string: "(-10,-10,0,0,300),(0,0,10,10,700)". Return null if 3090 // the passing string is null or the size is 0 or (0,0,0,0,0). 3091 private ArrayList<Area> splitArea(String str) { 3092 if (str == null || str.charAt(0) != '(' 3093 || str.charAt(str.length() - 1) != ')') { 3094 Log.e(TAG, "Invalid area string=" + str); 3095 return null; 3096 } 3097 3098 ArrayList<Area> result = new ArrayList<Area>(); 3099 int endIndex, fromIndex = 1; 3100 int[] array = new int[5]; 3101 do { 3102 endIndex = str.indexOf("),(", fromIndex); 3103 if (endIndex == -1) endIndex = str.length() - 1; 3104 splitInt(str.substring(fromIndex, endIndex), array); 3105 Rect rect = new Rect(array[0], array[1], array[2], array[3]); 3106 result.add(new Area(rect, array[4])); 3107 fromIndex = endIndex + 3; 3108 } while (endIndex != str.length() - 1); 3109 3110 if (result.size() == 0) return null; 3111 3112 if (result.size() == 1) { 3113 Area area = result.get(0); 3114 Rect rect = area.rect; 3115 if (rect.left == 0 && rect.top == 0 && rect.right == 0 3116 && rect.bottom == 0 && area.weight == 0) { 3117 return null; 3118 } 3119 } 3120 3121 return result; 3122 } 3123 }; 3124} 3125