Camera.java revision e00cab707dcaf6f05adb5ccb9c80fdf25c483427
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 java.lang.ref.WeakReference; 20import java.util.ArrayList; 21import java.util.HashMap; 22import java.util.List; 23import java.util.StringTokenizer; 24import java.io.IOException; 25 26import android.util.Log; 27import android.view.Surface; 28import android.view.SurfaceHolder; 29import android.graphics.ImageFormat; 30import android.graphics.SurfaceTexture; 31import android.os.Handler; 32import android.os.Looper; 33import android.os.Message; 34 35/** 36 * The Camera class is used to set image capture settings, start/stop preview, 37 * snap pictures, and retrieve frames for encoding for video. This class is a 38 * client for the Camera service, which manages the actual camera hardware. 39 * 40 * <p>To access the device camera, you must declare the 41 * {@link android.Manifest.permission#CAMERA} permission in your Android 42 * Manifest. Also be sure to include the 43 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 44 * manifest element to declare camera features used by your application. 45 * For example, if you use the camera and auto-focus feature, your Manifest 46 * should include the following:</p> 47 * <pre> <uses-permission android:name="android.permission.CAMERA" /> 48 * <uses-feature android:name="android.hardware.camera" /> 49 * <uses-feature android:name="android.hardware.camera.autofocus" /></pre> 50 * 51 * <p>To take pictures with this class, use the following steps:</p> 52 * 53 * <ol> 54 * <li>Obtain an instance of Camera from {@link #open(int)}. 55 * 56 * <li>Get existing (default) settings with {@link #getParameters()}. 57 * 58 * <li>If necessary, modify the returned {@link Camera.Parameters} object and call 59 * {@link #setParameters(Camera.Parameters)}. 60 * 61 * <li>If desired, call {@link #setDisplayOrientation(int)}. 62 * 63 * <li><b>Important</b>: Pass a fully initialized {@link SurfaceHolder} to 64 * {@link #setPreviewDisplay(SurfaceHolder)}. Without a surface, the camera 65 * will be unable to start the preview. 66 * 67 * <li><b>Important</b>: Call {@link #startPreview()} to start updating the 68 * preview surface. Preview must be started before you can take a picture. 69 * 70 * <li>When you want, call {@link #takePicture(Camera.ShutterCallback, 71 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)} to 72 * capture a photo. Wait for the callbacks to provide the actual image data. 73 * 74 * <li>After taking a picture, preview display will have stopped. To take more 75 * photos, call {@link #startPreview()} again first. 76 * 77 * <li>Call {@link #stopPreview()} to stop updating the preview surface. 78 * 79 * <li><b>Important:</b> Call {@link #release()} to release the camera for 80 * use by other applications. Applications should release the camera 81 * immediately in {@link android.app.Activity#onPause()} (and re-{@link #open()} 82 * it in {@link android.app.Activity#onResume()}). 83 * </ol> 84 * 85 * <p>To quickly switch to video recording mode, use these steps:</p> 86 * 87 * <ol> 88 * <li>Obtain and initialize a Camera and start preview as described above. 89 * 90 * <li>Call {@link #unlock()} to allow the media process to access the camera. 91 * 92 * <li>Pass the camera to {@link android.media.MediaRecorder#setCamera(Camera)}. 93 * See {@link android.media.MediaRecorder} information about video recording. 94 * 95 * <li>When finished recording, call {@link #reconnect()} to re-acquire 96 * and re-lock the camera. 97 * 98 * <li>If desired, restart preview and take more photos or videos. 99 * 100 * <li>Call {@link #stopPreview()} and {@link #release()} as described above. 101 * </ol> 102 * 103 * <p>This class is not thread-safe, and is meant for use from one event thread. 104 * Most long-running operations (preview, focus, photo capture, etc) happen 105 * asynchronously and invoke callbacks as necessary. Callbacks will be invoked 106 * on the event thread {@link #open(int)} was called from. This class's methods 107 * must never be called from multiple threads at once.</p> 108 * 109 * <p class="caution"><strong>Caution:</strong> Different Android-powered devices 110 * may have different hardware specifications, such as megapixel ratings and 111 * auto-focus capabilities. In order for your application to be compatible with 112 * more devices, you should not make assumptions about the device camera 113 * specifications.</p> 114 */ 115public class Camera { 116 private static final String TAG = "Camera"; 117 118 // These match the enums in frameworks/base/include/camera/Camera.h 119 private static final int CAMERA_MSG_ERROR = 0x001; 120 private static final int CAMERA_MSG_SHUTTER = 0x002; 121 private static final int CAMERA_MSG_FOCUS = 0x004; 122 private static final int CAMERA_MSG_ZOOM = 0x008; 123 private static final int CAMERA_MSG_PREVIEW_FRAME = 0x010; 124 private static final int CAMERA_MSG_VIDEO_FRAME = 0x020; 125 private static final int CAMERA_MSG_POSTVIEW_FRAME = 0x040; 126 private static final int CAMERA_MSG_RAW_IMAGE = 0x080; 127 private static final int CAMERA_MSG_COMPRESSED_IMAGE = 0x100; 128 private static final int CAMERA_MSG_ALL_MSGS = 0x1FF; 129 130 private int mNativeContext; // accessed by native methods 131 private EventHandler mEventHandler; 132 private ShutterCallback mShutterCallback; 133 private PictureCallback mRawImageCallback; 134 private PictureCallback mJpegCallback; 135 private PreviewCallback mPreviewCallback; 136 private PictureCallback mPostviewCallback; 137 private AutoFocusCallback mAutoFocusCallback; 138 private OnZoomChangeListener mZoomListener; 139 private ErrorCallback mErrorCallback; 140 private boolean mOneShot; 141 private boolean mWithBuffer; 142 143 /** 144 * Returns the number of physical cameras available on this device. 145 */ 146 public native static int getNumberOfCameras(); 147 148 /** 149 * Returns the information about a particular camera. 150 * If {@link #getNumberOfCameras()} returns N, the valid id is 0 to N-1. 151 */ 152 public native static void getCameraInfo(int cameraId, CameraInfo cameraInfo); 153 154 /** 155 * Information about a camera 156 */ 157 public static class CameraInfo { 158 /** 159 * The facing of the camera is opposite to that of the screen. 160 */ 161 public static final int CAMERA_FACING_BACK = 0; 162 163 /** 164 * The facing of the camera is the same as that of the screen. 165 */ 166 public static final int CAMERA_FACING_FRONT = 1; 167 168 /** 169 * The direction that the camera faces to. It should be 170 * CAMERA_FACING_BACK or CAMERA_FACING_FRONT. 171 */ 172 public int facing; 173 174 /** 175 * The orientation of the camera image. The value is the angle that the 176 * camera image needs to be rotated clockwise so it shows correctly on 177 * the display in its natural orientation. It should be 0, 90, 180, or 270. 178 * 179 * For example, suppose a device has a naturally tall screen. The 180 * back-facing camera sensor is mounted in landscape. You are looking at 181 * the screen. If the top side of the camera sensor is aligned with the 182 * right edge of the screen in natural orientation, the value should be 183 * 90. If the top side of a front-facing camera sensor is aligned with 184 * the right of the screen, the value should be 270. 185 * 186 * @see #setDisplayOrientation(int) 187 * @see Parameters#setRotation(int) 188 * @see Parameters#setPreviewSize(int, int) 189 * @see Parameters#setPictureSize(int, int) 190 * @see Parameters#setJpegThumbnailSize(int, int) 191 */ 192 public int orientation; 193 }; 194 195 /** 196 * Creates a new Camera object to access a particular hardware camera. 197 * 198 * <p>You must call {@link #release()} when you are done using the camera, 199 * otherwise it will remain locked and be unavailable to other applications. 200 * 201 * <p>Your application should only have one Camera object active at a time 202 * for a particular hardware camera. 203 * 204 * <p>Callbacks from other methods are delivered to the event loop of the 205 * thread which called open(). If this thread has no event loop, then 206 * callbacks are delivered to the main application event loop. If there 207 * is no main application event loop, callbacks are not delivered. 208 * 209 * <p class="caution"><b>Caution:</b> On some devices, this method may 210 * take a long time to complete. It is best to call this method from a 211 * worker thread (possibly using {@link android.os.AsyncTask}) to avoid 212 * blocking the main application UI thread. 213 * 214 * @param cameraId the hardware camera to access, between 0 and 215 * {@link #getNumberOfCameras()}-1. 216 * @return a new Camera object, connected, locked and ready for use. 217 * @throws RuntimeException if connection to the camera service fails (for 218 * example, if the camera is in use by another process). 219 */ 220 public static Camera open(int cameraId) { 221 return new Camera(cameraId); 222 } 223 224 /** 225 * Creates a new Camera object to access the first back-facing camera on the 226 * device. If the device does not have a back-facing camera, this returns 227 * null. 228 * @see #open(int) 229 */ 230 public static Camera open() { 231 int numberOfCameras = getNumberOfCameras(); 232 CameraInfo cameraInfo = new CameraInfo(); 233 for (int i = 0; i < numberOfCameras; i++) { 234 getCameraInfo(i, cameraInfo); 235 if (cameraInfo.facing == CameraInfo.CAMERA_FACING_BACK) { 236 return new Camera(i); 237 } 238 } 239 return null; 240 } 241 242 Camera(int cameraId) { 243 mShutterCallback = null; 244 mRawImageCallback = null; 245 mJpegCallback = null; 246 mPreviewCallback = null; 247 mPostviewCallback = null; 248 mZoomListener = null; 249 250 Looper looper; 251 if ((looper = Looper.myLooper()) != null) { 252 mEventHandler = new EventHandler(this, looper); 253 } else if ((looper = Looper.getMainLooper()) != null) { 254 mEventHandler = new EventHandler(this, looper); 255 } else { 256 mEventHandler = null; 257 } 258 259 native_setup(new WeakReference<Camera>(this), cameraId); 260 } 261 262 protected void finalize() { 263 native_release(); 264 } 265 266 private native final void native_setup(Object camera_this, int cameraId); 267 private native final void native_release(); 268 269 270 /** 271 * Disconnects and releases the Camera object resources. 272 * 273 * <p>You must call this as soon as you're done with the Camera object.</p> 274 */ 275 public final void release() { 276 native_release(); 277 } 278 279 /** 280 * Unlocks the camera to allow another process to access it. 281 * Normally, the camera is locked to the process with an active Camera 282 * object until {@link #release()} is called. To allow rapid handoff 283 * between processes, you can call this method to release the camera 284 * temporarily for another process to use; once the other process is done 285 * you can call {@link #reconnect()} to reclaim the camera. 286 * 287 * <p>This must be done before calling 288 * {@link android.media.MediaRecorder#setCamera(Camera)}. 289 * 290 * <p>If you are not recording video, you probably do not need this method. 291 * 292 * @throws RuntimeException if the camera cannot be unlocked. 293 */ 294 public native final void unlock(); 295 296 /** 297 * Re-locks the camera to prevent other processes from accessing it. 298 * Camera objects are locked by default unless {@link #unlock()} is 299 * called. Normally {@link #reconnect()} is used instead. 300 * 301 * <p>If you are not recording video, you probably do not need this method. 302 * 303 * @throws RuntimeException if the camera cannot be re-locked (for 304 * example, if the camera is still in use by another process). 305 */ 306 public native final void lock(); 307 308 /** 309 * Reconnects to the camera service after another process used it. 310 * After {@link #unlock()} is called, another process may use the 311 * camera; when the process is done, you must reconnect to the camera, 312 * which will re-acquire the lock and allow you to continue using the 313 * camera. 314 * 315 * <p>This must be done after {@link android.media.MediaRecorder} is 316 * done recording if {@link android.media.MediaRecorder#setCamera(Camera)} 317 * was used. 318 * 319 * <p>If you are not recording video, you probably do not need this method. 320 * 321 * @throws IOException if a connection cannot be re-established (for 322 * example, if the camera is still in use by another process). 323 */ 324 public native final void reconnect() throws IOException; 325 326 /** 327 * Sets the {@link Surface} to be used for live preview. 328 * Either a surface or surface texture is necessary for preview, and 329 * preview is necessary to take pictures. The same surface can be re-set 330 * without harm. Setting a preview surface will un-set any preview surface 331 * texture that was set via {@link #setPreviewTexture}. 332 * 333 * <p>The {@link SurfaceHolder} must already contain a surface when this 334 * method is called. If you are using {@link android.view.SurfaceView}, 335 * you will need to register a {@link SurfaceHolder.Callback} with 336 * {@link SurfaceHolder#addCallback(SurfaceHolder.Callback)} and wait for 337 * {@link SurfaceHolder.Callback#surfaceCreated(SurfaceHolder)} before 338 * calling setPreviewDisplay() or starting preview. 339 * 340 * <p>This method must be called before {@link #startPreview()}. The 341 * one exception is that if the preview surface is not set (or set to null) 342 * before startPreview() is called, then this method may be called once 343 * with a non-null parameter to set the preview surface. (This allows 344 * camera setup and surface creation to happen in parallel, saving time.) 345 * The preview surface may not otherwise change while preview is running. 346 * 347 * @param holder containing the Surface on which to place the preview, 348 * or null to remove the preview surface 349 * @throws IOException if the method fails (for example, if the surface 350 * is unavailable or unsuitable). 351 */ 352 public final void setPreviewDisplay(SurfaceHolder holder) throws IOException { 353 if (holder != null) { 354 setPreviewDisplay(holder.getSurface()); 355 } else { 356 setPreviewDisplay((Surface)null); 357 } 358 } 359 360 private native final void setPreviewDisplay(Surface surface) throws IOException; 361 362 /** 363 * Sets the {@link SurfaceTexture} to be used for live preview. 364 * Either a surface or surface texture is necessary for preview, and 365 * preview is necessary to take pictures. The same surface texture can be 366 * re-set without harm. Setting a preview surface texture will un-set any 367 * preview surface that was set via {@link #setPreviewDisplay}. 368 * 369 * <p>This method must be called before {@link #startPreview()}. The 370 * one exception is that if the preview surface texture is not set (or set 371 * to null) before startPreview() is called, then this method may be called 372 * once with a non-null parameter to set the preview surface. (This allows 373 * camera setup and surface creation to happen in parallel, saving time.) 374 * The preview surface texture may not otherwise change while preview is 375 * running. 376 * 377 * @param surfaceTexture the {@link SurfaceTexture} to which the preview 378 * images are to be sent or null to remove the current preview surface 379 * texture 380 * @throws IOException if the method fails (for example, if the surface 381 * texture is unavailable or unsuitable). 382 */ 383 public native final void setPreviewTexture(SurfaceTexture surfaceTexture) throws IOException; 384 385 /** 386 * Callback interface used to deliver copies of preview frames as 387 * they are displayed. 388 * 389 * @see #setPreviewCallback(Camera.PreviewCallback) 390 * @see #setOneShotPreviewCallback(Camera.PreviewCallback) 391 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 392 * @see #startPreview() 393 */ 394 public interface PreviewCallback 395 { 396 /** 397 * Called as preview frames are displayed. This callback is invoked 398 * on the event thread {@link #open(int)} was called from. 399 * 400 * @param data the contents of the preview frame in the format defined 401 * by {@link android.graphics.ImageFormat}, which can be queried 402 * with {@link android.hardware.Camera.Parameters#getPreviewFormat()}. 403 * If {@link android.hardware.Camera.Parameters#setPreviewFormat(int)} 404 * is never called, the default will be the YCbCr_420_SP 405 * (NV21) format. 406 * @param camera the Camera service object. 407 */ 408 void onPreviewFrame(byte[] data, Camera camera); 409 }; 410 411 /** 412 * Starts capturing and drawing preview frames to the screen. 413 * Preview will not actually start until a surface is supplied with 414 * {@link #setPreviewDisplay(SurfaceHolder)}. 415 * 416 * <p>If {@link #setPreviewCallback(Camera.PreviewCallback)}, 417 * {@link #setOneShotPreviewCallback(Camera.PreviewCallback)}, or 418 * {@link #setPreviewCallbackWithBuffer(Camera.PreviewCallback)} were 419 * called, {@link Camera.PreviewCallback#onPreviewFrame(byte[], Camera)} 420 * will be called when preview data becomes available. 421 */ 422 public native final void startPreview(); 423 424 /** 425 * Stops capturing and drawing preview frames to the surface, and 426 * resets the camera for a future call to {@link #startPreview()}. 427 */ 428 public native final void stopPreview(); 429 430 /** 431 * Return current preview state. 432 * 433 * FIXME: Unhide before release 434 * @hide 435 */ 436 public native final boolean previewEnabled(); 437 438 /** 439 * Installs a callback to be invoked for every preview frame in addition 440 * to displaying them on the screen. The callback will be repeatedly called 441 * for as long as preview is active. This method can be called at any time, 442 * even while preview is live. Any other preview callbacks are overridden. 443 * 444 * @param cb a callback object that receives a copy of each preview frame, 445 * or null to stop receiving callbacks. 446 */ 447 public final void setPreviewCallback(PreviewCallback cb) { 448 mPreviewCallback = cb; 449 mOneShot = false; 450 mWithBuffer = false; 451 // Always use one-shot mode. We fake camera preview mode by 452 // doing one-shot preview continuously. 453 setHasPreviewCallback(cb != null, false); 454 } 455 456 /** 457 * Installs a callback to be invoked for the next preview frame in addition 458 * to displaying it on the screen. After one invocation, the callback is 459 * cleared. This method can be called any time, even when preview is live. 460 * Any other preview callbacks are overridden. 461 * 462 * @param cb a callback object that receives a copy of the next preview frame, 463 * or null to stop receiving callbacks. 464 */ 465 public final void setOneShotPreviewCallback(PreviewCallback cb) { 466 mPreviewCallback = cb; 467 mOneShot = true; 468 mWithBuffer = false; 469 setHasPreviewCallback(cb != null, false); 470 } 471 472 private native final void setHasPreviewCallback(boolean installed, boolean manualBuffer); 473 474 /** 475 * Installs a callback to be invoked for every preview frame, using buffers 476 * supplied with {@link #addCallbackBuffer(byte[])}, in addition to 477 * displaying them on the screen. The callback will be repeatedly called 478 * for as long as preview is active and buffers are available. 479 * Any other preview callbacks are overridden. 480 * 481 * <p>The purpose of this method is to improve preview efficiency and frame 482 * rate by allowing preview frame memory reuse. You must call 483 * {@link #addCallbackBuffer(byte[])} at some point -- before or after 484 * calling this method -- or no callbacks will received. 485 * 486 * The buffer queue will be cleared if this method is called with a null 487 * callback, {@link #setPreviewCallback(Camera.PreviewCallback)} is called, 488 * or {@link #setOneShotPreviewCallback(Camera.PreviewCallback)} is called. 489 * 490 * @param cb a callback object that receives a copy of the preview frame, 491 * or null to stop receiving callbacks and clear the buffer queue. 492 * @see #addCallbackBuffer(byte[]) 493 */ 494 public final void setPreviewCallbackWithBuffer(PreviewCallback cb) { 495 mPreviewCallback = cb; 496 mOneShot = false; 497 mWithBuffer = true; 498 setHasPreviewCallback(cb != null, true); 499 } 500 501 /** 502 * Adds a pre-allocated buffer to the preview callback buffer queue. 503 * Applications can add one or more buffers to the queue. When a preview 504 * frame arrives and there is still at least one available buffer, the 505 * buffer will be used and removed from the queue. Then preview callback is 506 * invoked with the buffer. If a frame arrives and there is no buffer left, 507 * the frame is discarded. Applications should add buffers back when they 508 * finish processing the data in them. 509 * 510 * <p>The size of the buffer is determined by multiplying the preview 511 * image width, height, and bytes per pixel. The width and height can be 512 * read from {@link Camera.Parameters#getPreviewSize()}. Bytes per pixel 513 * can be computed from 514 * {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 8, 515 * using the image format from {@link Camera.Parameters#getPreviewFormat()}. 516 * 517 * <p>This method is only necessary when 518 * {@link #setPreviewCallbackWithBuffer(PreviewCallback)} is used. When 519 * {@link #setPreviewCallback(PreviewCallback)} or 520 * {@link #setOneShotPreviewCallback(PreviewCallback)} are used, buffers 521 * are automatically allocated. When a supplied buffer is too small to 522 * hold the preview frame data, preview callback will return null and 523 * the buffer will be removed from the buffer queue. 524 * 525 * @param callbackBuffer the buffer to add to the queue. 526 * The size should be width * height * bits_per_pixel / 8. 527 * @see #setPreviewCallbackWithBuffer(PreviewCallback) 528 */ 529 public final void addCallbackBuffer(byte[] callbackBuffer) 530 { 531 _addCallbackBuffer(callbackBuffer, CAMERA_MSG_PREVIEW_FRAME); 532 } 533 534 /** 535 * Adds a pre-allocated buffer to the raw image callback buffer queue. 536 * Applications can add one or more buffers to the queue. When a raw image 537 * frame arrives and there is still at least one available buffer, the 538 * buffer will be used to hold the raw image data and removed from the 539 * queue. Then raw image callback is invoked with the buffer. If a raw 540 * image frame arrives but there is no buffer left, the frame is 541 * discarded. Applications should add buffers back when they finish 542 * processing the data in them by calling this method again in order 543 * to avoid running out of raw image callback buffers. 544 * 545 * <p>The size of the buffer is determined by multiplying the raw image 546 * width, height, and bytes per pixel. The width and height can be 547 * read from {@link Camera.Parameters#getPictureSize()}. Bytes per pixel 548 * can be computed from 549 * {@link android.graphics.ImageFormat#getBitsPerPixel(int)} / 8, 550 * using the image format from {@link Camera.Parameters#getPreviewFormat()}. 551 * 552 * <p>This method is only necessary when the PictureCallbck for raw image 553 * is used while calling {@link #takePicture(Camera.ShutterCallback, 554 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}. 555 * 556 * Please note that by calling this method, the mode for application-managed 557 * callback buffers is triggered. If this method has never been called, 558 * null will be returned by the raw image callback since there is 559 * no image callback buffer available. Furthermore, When a supplied buffer 560 * is too small to hold the raw image data, raw image callback will return 561 * null and the buffer will be removed from the buffer queue. 562 * 563 * @param callbackBuffer the buffer to add to the raw image callback buffer 564 * queue. The size should be width * height * (bits per pixel) / 8. An 565 * null callbackBuffer will be ignored and won't be added to the queue. 566 * 567 * @see #takePicture(Camera.ShutterCallback, 568 * Camera.PictureCallback, Camera.PictureCallback, Camera.PictureCallback)}. 569 * 570 * {@hide} 571 */ 572 public final void addRawImageCallbackBuffer(byte[] callbackBuffer) 573 { 574 addCallbackBuffer(callbackBuffer, CAMERA_MSG_RAW_IMAGE); 575 } 576 577 private final void addCallbackBuffer(byte[] callbackBuffer, int msgType) 578 { 579 // CAMERA_MSG_VIDEO_FRAME may be allowed in the future. 580 if (msgType != CAMERA_MSG_PREVIEW_FRAME && 581 msgType != CAMERA_MSG_RAW_IMAGE) { 582 throw new IllegalArgumentException( 583 "Unsupported message type: " + msgType); 584 } 585 586 _addCallbackBuffer(callbackBuffer, msgType); 587 } 588 589 private native final void _addCallbackBuffer( 590 byte[] callbackBuffer, int msgType); 591 592 private class EventHandler extends Handler 593 { 594 private Camera mCamera; 595 596 public EventHandler(Camera c, Looper looper) { 597 super(looper); 598 mCamera = c; 599 } 600 601 @Override 602 public void handleMessage(Message msg) { 603 switch(msg.what) { 604 case CAMERA_MSG_SHUTTER: 605 if (mShutterCallback != null) { 606 mShutterCallback.onShutter(); 607 } 608 return; 609 610 case CAMERA_MSG_RAW_IMAGE: 611 if (mRawImageCallback != null) { 612 mRawImageCallback.onPictureTaken((byte[])msg.obj, mCamera); 613 } 614 return; 615 616 case CAMERA_MSG_COMPRESSED_IMAGE: 617 if (mJpegCallback != null) { 618 mJpegCallback.onPictureTaken((byte[])msg.obj, mCamera); 619 } 620 return; 621 622 case CAMERA_MSG_PREVIEW_FRAME: 623 if (mPreviewCallback != null) { 624 PreviewCallback cb = mPreviewCallback; 625 if (mOneShot) { 626 // Clear the callback variable before the callback 627 // in case the app calls setPreviewCallback from 628 // the callback function 629 mPreviewCallback = null; 630 } else if (!mWithBuffer) { 631 // We're faking the camera preview mode to prevent 632 // the app from being flooded with preview frames. 633 // Set to oneshot mode again. 634 setHasPreviewCallback(true, false); 635 } 636 cb.onPreviewFrame((byte[])msg.obj, mCamera); 637 } 638 return; 639 640 case CAMERA_MSG_POSTVIEW_FRAME: 641 if (mPostviewCallback != null) { 642 mPostviewCallback.onPictureTaken((byte[])msg.obj, mCamera); 643 } 644 return; 645 646 case CAMERA_MSG_FOCUS: 647 if (mAutoFocusCallback != null) { 648 mAutoFocusCallback.onAutoFocus(msg.arg1 == 0 ? false : true, mCamera); 649 } 650 return; 651 652 case CAMERA_MSG_ZOOM: 653 if (mZoomListener != null) { 654 mZoomListener.onZoomChange(msg.arg1, msg.arg2 != 0, mCamera); 655 } 656 return; 657 658 case CAMERA_MSG_ERROR : 659 Log.e(TAG, "Error " + msg.arg1); 660 if (mErrorCallback != null) { 661 mErrorCallback.onError(msg.arg1, mCamera); 662 } 663 return; 664 665 default: 666 Log.e(TAG, "Unknown message type " + msg.what); 667 return; 668 } 669 } 670 } 671 672 private static void postEventFromNative(Object camera_ref, 673 int what, int arg1, int arg2, Object obj) 674 { 675 Camera c = (Camera)((WeakReference)camera_ref).get(); 676 if (c == null) 677 return; 678 679 if (c.mEventHandler != null) { 680 Message m = c.mEventHandler.obtainMessage(what, arg1, arg2, obj); 681 c.mEventHandler.sendMessage(m); 682 } 683 } 684 685 /** 686 * Callback interface used to notify on completion of camera auto focus. 687 * 688 * <p>Devices that do not support auto-focus will receive a "fake" 689 * callback to this interface. If your application needs auto-focus and 690 * should not be installed on devices <em>without</em> auto-focus, you must 691 * declare that your app uses the 692 * {@code android.hardware.camera.autofocus} feature, in the 693 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 694 * manifest element.</p> 695 * 696 * @see #autoFocus(AutoFocusCallback) 697 */ 698 public interface AutoFocusCallback 699 { 700 /** 701 * Called when the camera auto focus completes. If the camera 702 * does not support auto-focus and autoFocus is called, 703 * onAutoFocus will be called immediately with a fake value of 704 * <code>success</code> set to <code>true</code>. 705 * 706 * @param success true if focus was successful, false if otherwise 707 * @param camera the Camera service object 708 */ 709 void onAutoFocus(boolean success, Camera camera); 710 }; 711 712 /** 713 * Starts camera auto-focus and registers a callback function to run when 714 * the camera is focused. This method is only valid when preview is active 715 * (between {@link #startPreview()} and before {@link #stopPreview()}). 716 * 717 * <p>Callers should check 718 * {@link android.hardware.Camera.Parameters#getFocusMode()} to determine if 719 * this method should be called. If the camera does not support auto-focus, 720 * it is a no-op and {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} 721 * callback will be called immediately. 722 * 723 * <p>If your application should not be installed 724 * on devices without auto-focus, you must declare that your application 725 * uses auto-focus with the 726 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 727 * manifest element.</p> 728 * 729 * <p>If the current flash mode is not 730 * {@link android.hardware.Camera.Parameters#FLASH_MODE_OFF}, flash may be 731 * fired during auto-focus, depending on the driver and camera hardware.<p> 732 * 733 * @param cb the callback to run 734 * @see #cancelAutoFocus() 735 */ 736 public final void autoFocus(AutoFocusCallback cb) 737 { 738 mAutoFocusCallback = cb; 739 native_autoFocus(); 740 } 741 private native final void native_autoFocus(); 742 743 /** 744 * Cancels any auto-focus function in progress. 745 * Whether or not auto-focus is currently in progress, 746 * this function will return the focus position to the default. 747 * If the camera does not support auto-focus, this is a no-op. 748 * 749 * @see #autoFocus(Camera.AutoFocusCallback) 750 */ 751 public final void cancelAutoFocus() 752 { 753 mAutoFocusCallback = null; 754 native_cancelAutoFocus(); 755 } 756 private native final void native_cancelAutoFocus(); 757 758 /** 759 * Callback interface used to signal the moment of actual image capture. 760 * 761 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 762 */ 763 public interface ShutterCallback 764 { 765 /** 766 * Called as near as possible to the moment when a photo is captured 767 * from the sensor. This is a good opportunity to play a shutter sound 768 * or give other feedback of camera operation. This may be some time 769 * after the photo was triggered, but some time before the actual data 770 * is available. 771 */ 772 void onShutter(); 773 } 774 775 /** 776 * Callback interface used to supply image data from a photo capture. 777 * 778 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 779 */ 780 public interface PictureCallback { 781 /** 782 * Called when image data is available after a picture is taken. 783 * The format of the data depends on the context of the callback 784 * and {@link Camera.Parameters} settings. 785 * 786 * @param data a byte array of the picture data 787 * @param camera the Camera service object 788 */ 789 void onPictureTaken(byte[] data, Camera camera); 790 }; 791 792 /** 793 * Equivalent to takePicture(shutter, raw, null, jpeg). 794 * 795 * @see #takePicture(ShutterCallback, PictureCallback, PictureCallback, PictureCallback) 796 */ 797 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 798 PictureCallback jpeg) { 799 takePicture(shutter, raw, null, jpeg); 800 } 801 private native final void native_takePicture(int msgType); 802 803 /** 804 * Triggers an asynchronous image capture. The camera service will initiate 805 * a series of callbacks to the application as the image capture progresses. 806 * The shutter callback occurs after the image is captured. This can be used 807 * to trigger a sound to let the user know that image has been captured. The 808 * raw callback occurs when the raw image data is available (NOTE: the data 809 * will be null if there is no raw image callback buffer available or the 810 * raw image callback buffer is not large enough to hold the raw image). 811 * The postview callback occurs when a scaled, fully processed postview 812 * image is available (NOTE: not all hardware supports this). The jpeg 813 * callback occurs when the compressed image is available. If the 814 * application does not need a particular callback, a null can be passed 815 * instead of a callback method. 816 * 817 * <p>This method is only valid when preview is active (after 818 * {@link #startPreview()}). Preview will be stopped after the image is 819 * taken; callers must call {@link #startPreview()} again if they want to 820 * re-start preview or take more pictures. 821 * 822 * <p>After calling this method, you must not call {@link #startPreview()} 823 * or take another picture until the JPEG callback has returned. 824 * 825 * @param shutter the callback for image capture moment, or null 826 * @param raw the callback for raw (uncompressed) image data, or null 827 * @param postview callback with postview image data, may be null 828 * @param jpeg the callback for JPEG image data, or null 829 * 830 * @see #addRawImageCallbackBuffer(byte[]) 831 */ 832 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 833 PictureCallback postview, PictureCallback jpeg) { 834 mShutterCallback = shutter; 835 mRawImageCallback = raw; 836 mPostviewCallback = postview; 837 mJpegCallback = jpeg; 838 839 // If callback is not set, do not send me callbacks. 840 int msgType = 0; 841 if (mShutterCallback != null) { 842 msgType |= CAMERA_MSG_SHUTTER; 843 } 844 if (mRawImageCallback != null) { 845 msgType |= CAMERA_MSG_RAW_IMAGE; 846 } 847 if (mPostviewCallback != null) { 848 msgType |= CAMERA_MSG_POSTVIEW_FRAME; 849 } 850 if (mJpegCallback != null) { 851 msgType |= CAMERA_MSG_COMPRESSED_IMAGE; 852 } 853 854 native_takePicture(msgType); 855 } 856 857 /** 858 * Zooms to the requested value smoothly. The driver will notify {@link 859 * OnZoomChangeListener} of the zoom value and whether zoom is stopped at 860 * the time. For example, suppose the current zoom is 0 and startSmoothZoom 861 * is called with value 3. The 862 * {@link Camera.OnZoomChangeListener#onZoomChange(int, boolean, Camera)} 863 * method will be called three times with zoom values 1, 2, and 3. 864 * Applications can call {@link #stopSmoothZoom} to stop the zoom earlier. 865 * Applications should not call startSmoothZoom again or change the zoom 866 * value before zoom stops. If the supplied zoom value equals to the current 867 * zoom value, no zoom callback will be generated. This method is supported 868 * if {@link android.hardware.Camera.Parameters#isSmoothZoomSupported} 869 * returns true. 870 * 871 * @param value zoom value. The valid range is 0 to {@link 872 * android.hardware.Camera.Parameters#getMaxZoom}. 873 * @throws IllegalArgumentException if the zoom value is invalid. 874 * @throws RuntimeException if the method fails. 875 * @see #setZoomChangeListener(OnZoomChangeListener) 876 */ 877 public native final void startSmoothZoom(int value); 878 879 /** 880 * Stops the smooth zoom. Applications should wait for the {@link 881 * OnZoomChangeListener} to know when the zoom is actually stopped. This 882 * method is supported if {@link 883 * android.hardware.Camera.Parameters#isSmoothZoomSupported} is true. 884 * 885 * @throws RuntimeException if the method fails. 886 */ 887 public native final void stopSmoothZoom(); 888 889 /** 890 * Set the clockwise rotation of preview display in degrees. This affects 891 * the preview frames and the picture displayed after snapshot. This method 892 * is useful for portrait mode applications. Note that preview display of 893 * front-facing cameras is flipped horizontally before the rotation, that 894 * is, the image is reflected along the central vertical axis of the camera 895 * sensor. So the users can see themselves as looking into a mirror. 896 * 897 * <p>This does not affect the order of byte array passed in {@link 898 * PreviewCallback#onPreviewFrame}, JPEG pictures, or recorded videos. This 899 * method is not allowed to be called during preview. 900 * 901 * <p>If you want to make the camera image show in the same orientation as 902 * the display, you can use the following code. 903 * <pre> 904 * public static void setCameraDisplayOrientation(Activity activity, 905 * int cameraId, android.hardware.Camera camera) { 906 * android.hardware.Camera.CameraInfo info = 907 * new android.hardware.Camera.CameraInfo(); 908 * android.hardware.Camera.getCameraInfo(cameraId, info); 909 * int rotation = activity.getWindowManager().getDefaultDisplay() 910 * .getRotation(); 911 * int degrees = 0; 912 * switch (rotation) { 913 * case Surface.ROTATION_0: degrees = 0; break; 914 * case Surface.ROTATION_90: degrees = 90; break; 915 * case Surface.ROTATION_180: degrees = 180; break; 916 * case Surface.ROTATION_270: degrees = 270; break; 917 * } 918 * 919 * int result; 920 * if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) { 921 * result = (info.orientation + degrees) % 360; 922 * result = (360 - result) % 360; // compensate the mirror 923 * } else { // back-facing 924 * result = (info.orientation - degrees + 360) % 360; 925 * } 926 * camera.setDisplayOrientation(result); 927 * } 928 * </pre> 929 * @param degrees the angle that the picture will be rotated clockwise. 930 * Valid values are 0, 90, 180, and 270. The starting 931 * position is 0 (landscape). 932 * @see #setPreviewDisplay(SurfaceHolder) 933 */ 934 public native final void setDisplayOrientation(int degrees); 935 936 /** 937 * Callback interface for zoom changes during a smooth zoom operation. 938 * 939 * @see #setZoomChangeListener(OnZoomChangeListener) 940 * @see #startSmoothZoom(int) 941 */ 942 public interface OnZoomChangeListener 943 { 944 /** 945 * Called when the zoom value has changed during a smooth zoom. 946 * 947 * @param zoomValue the current zoom value. In smooth zoom mode, camera 948 * calls this for every new zoom value. 949 * @param stopped whether smooth zoom is stopped. If the value is true, 950 * this is the last zoom update for the application. 951 * @param camera the Camera service object 952 */ 953 void onZoomChange(int zoomValue, boolean stopped, Camera camera); 954 }; 955 956 /** 957 * Registers a listener to be notified when the zoom value is updated by the 958 * camera driver during smooth zoom. 959 * 960 * @param listener the listener to notify 961 * @see #startSmoothZoom(int) 962 */ 963 public final void setZoomChangeListener(OnZoomChangeListener listener) 964 { 965 mZoomListener = listener; 966 } 967 968 // Error codes match the enum in include/ui/Camera.h 969 970 /** 971 * Unspecified camera error. 972 * @see Camera.ErrorCallback 973 */ 974 public static final int CAMERA_ERROR_UNKNOWN = 1; 975 976 /** 977 * Media server died. In this case, the application must release the 978 * Camera object and instantiate a new one. 979 * @see Camera.ErrorCallback 980 */ 981 public static final int CAMERA_ERROR_SERVER_DIED = 100; 982 983 /** 984 * Callback interface for camera error notification. 985 * 986 * @see #setErrorCallback(ErrorCallback) 987 */ 988 public interface ErrorCallback 989 { 990 /** 991 * Callback for camera errors. 992 * @param error error code: 993 * <ul> 994 * <li>{@link #CAMERA_ERROR_UNKNOWN} 995 * <li>{@link #CAMERA_ERROR_SERVER_DIED} 996 * </ul> 997 * @param camera the Camera service object 998 */ 999 void onError(int error, Camera camera); 1000 }; 1001 1002 /** 1003 * Registers a callback to be invoked when an error occurs. 1004 * @param cb The callback to run 1005 */ 1006 public final void setErrorCallback(ErrorCallback cb) 1007 { 1008 mErrorCallback = cb; 1009 } 1010 1011 private native final void native_setParameters(String params); 1012 private native final String native_getParameters(); 1013 1014 /** 1015 * Changes the settings for this Camera service. 1016 * 1017 * @param params the Parameters to use for this Camera service 1018 * @throws RuntimeException if any parameter is invalid or not supported. 1019 * @see #getParameters() 1020 */ 1021 public void setParameters(Parameters params) { 1022 native_setParameters(params.flatten()); 1023 } 1024 1025 /** 1026 * Returns the current settings for this Camera service. 1027 * If modifications are made to the returned Parameters, they must be passed 1028 * to {@link #setParameters(Camera.Parameters)} to take effect. 1029 * 1030 * @see #setParameters(Camera.Parameters) 1031 */ 1032 public Parameters getParameters() { 1033 Parameters p = new Parameters(); 1034 String s = native_getParameters(); 1035 p.unflatten(s); 1036 return p; 1037 } 1038 1039 /** 1040 * Image size (width and height dimensions). 1041 */ 1042 public class Size { 1043 /** 1044 * Sets the dimensions for pictures. 1045 * 1046 * @param w the photo width (pixels) 1047 * @param h the photo height (pixels) 1048 */ 1049 public Size(int w, int h) { 1050 width = w; 1051 height = h; 1052 } 1053 /** 1054 * Compares {@code obj} to this size. 1055 * 1056 * @param obj the object to compare this size with. 1057 * @return {@code true} if the width and height of {@code obj} is the 1058 * same as those of this size. {@code false} otherwise. 1059 */ 1060 @Override 1061 public boolean equals(Object obj) { 1062 if (!(obj instanceof Size)) { 1063 return false; 1064 } 1065 Size s = (Size) obj; 1066 return width == s.width && height == s.height; 1067 } 1068 @Override 1069 public int hashCode() { 1070 return width * 32713 + height; 1071 } 1072 /** width of the picture */ 1073 public int width; 1074 /** height of the picture */ 1075 public int height; 1076 }; 1077 1078 /** 1079 * Camera service settings. 1080 * 1081 * <p>To make camera parameters take effect, applications have to call 1082 * {@link Camera#setParameters(Camera.Parameters)}. For example, after 1083 * {@link Camera.Parameters#setWhiteBalance} is called, white balance is not 1084 * actually changed until {@link Camera#setParameters(Camera.Parameters)} 1085 * is called with the changed parameters object. 1086 * 1087 * <p>Different devices may have different camera capabilities, such as 1088 * picture size or flash modes. The application should query the camera 1089 * capabilities before setting parameters. For example, the application 1090 * should call {@link Camera.Parameters#getSupportedColorEffects()} before 1091 * calling {@link Camera.Parameters#setColorEffect(String)}. If the 1092 * camera does not support color effects, 1093 * {@link Camera.Parameters#getSupportedColorEffects()} will return null. 1094 */ 1095 public class Parameters { 1096 // Parameter keys to communicate with the camera driver. 1097 private static final String KEY_PREVIEW_SIZE = "preview-size"; 1098 private static final String KEY_PREVIEW_FORMAT = "preview-format"; 1099 private static final String KEY_PREVIEW_FRAME_RATE = "preview-frame-rate"; 1100 private static final String KEY_PREVIEW_FPS_RANGE = "preview-fps-range"; 1101 private static final String KEY_PICTURE_SIZE = "picture-size"; 1102 private static final String KEY_PICTURE_FORMAT = "picture-format"; 1103 private static final String KEY_JPEG_THUMBNAIL_SIZE = "jpeg-thumbnail-size"; 1104 private static final String KEY_JPEG_THUMBNAIL_WIDTH = "jpeg-thumbnail-width"; 1105 private static final String KEY_JPEG_THUMBNAIL_HEIGHT = "jpeg-thumbnail-height"; 1106 private static final String KEY_JPEG_THUMBNAIL_QUALITY = "jpeg-thumbnail-quality"; 1107 private static final String KEY_JPEG_QUALITY = "jpeg-quality"; 1108 private static final String KEY_ROTATION = "rotation"; 1109 private static final String KEY_GPS_LATITUDE = "gps-latitude"; 1110 private static final String KEY_GPS_LONGITUDE = "gps-longitude"; 1111 private static final String KEY_GPS_ALTITUDE = "gps-altitude"; 1112 private static final String KEY_GPS_TIMESTAMP = "gps-timestamp"; 1113 private static final String KEY_GPS_PROCESSING_METHOD = "gps-processing-method"; 1114 private static final String KEY_WHITE_BALANCE = "whitebalance"; 1115 private static final String KEY_EFFECT = "effect"; 1116 private static final String KEY_ANTIBANDING = "antibanding"; 1117 private static final String KEY_SCENE_MODE = "scene-mode"; 1118 private static final String KEY_FLASH_MODE = "flash-mode"; 1119 private static final String KEY_FOCUS_MODE = "focus-mode"; 1120 private static final String KEY_FOCAL_LENGTH = "focal-length"; 1121 private static final String KEY_HORIZONTAL_VIEW_ANGLE = "horizontal-view-angle"; 1122 private static final String KEY_VERTICAL_VIEW_ANGLE = "vertical-view-angle"; 1123 private static final String KEY_EXPOSURE_COMPENSATION = "exposure-compensation"; 1124 private static final String KEY_MAX_EXPOSURE_COMPENSATION = "max-exposure-compensation"; 1125 private static final String KEY_MIN_EXPOSURE_COMPENSATION = "min-exposure-compensation"; 1126 private static final String KEY_EXPOSURE_COMPENSATION_STEP = "exposure-compensation-step"; 1127 private static final String KEY_ZOOM = "zoom"; 1128 private static final String KEY_MAX_ZOOM = "max-zoom"; 1129 private static final String KEY_ZOOM_RATIOS = "zoom-ratios"; 1130 private static final String KEY_ZOOM_SUPPORTED = "zoom-supported"; 1131 private static final String KEY_SMOOTH_ZOOM_SUPPORTED = "smooth-zoom-supported"; 1132 private static final String KEY_FOCUS_DISTANCES = "focus-distances"; 1133 private static final String KEY_VIDEO_SIZE = "video-size"; 1134 private static final String KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO = 1135 "preferred-preview-size-for-video"; 1136 1137 // Parameter key suffix for supported values. 1138 private static final String SUPPORTED_VALUES_SUFFIX = "-values"; 1139 1140 private static final String TRUE = "true"; 1141 1142 // Values for white balance settings. 1143 public static final String WHITE_BALANCE_AUTO = "auto"; 1144 public static final String WHITE_BALANCE_INCANDESCENT = "incandescent"; 1145 public static final String WHITE_BALANCE_FLUORESCENT = "fluorescent"; 1146 public static final String WHITE_BALANCE_WARM_FLUORESCENT = "warm-fluorescent"; 1147 public static final String WHITE_BALANCE_DAYLIGHT = "daylight"; 1148 public static final String WHITE_BALANCE_CLOUDY_DAYLIGHT = "cloudy-daylight"; 1149 public static final String WHITE_BALANCE_TWILIGHT = "twilight"; 1150 public static final String WHITE_BALANCE_SHADE = "shade"; 1151 1152 // Values for color effect settings. 1153 public static final String EFFECT_NONE = "none"; 1154 public static final String EFFECT_MONO = "mono"; 1155 public static final String EFFECT_NEGATIVE = "negative"; 1156 public static final String EFFECT_SOLARIZE = "solarize"; 1157 public static final String EFFECT_SEPIA = "sepia"; 1158 public static final String EFFECT_POSTERIZE = "posterize"; 1159 public static final String EFFECT_WHITEBOARD = "whiteboard"; 1160 public static final String EFFECT_BLACKBOARD = "blackboard"; 1161 public static final String EFFECT_AQUA = "aqua"; 1162 1163 // Values for antibanding settings. 1164 public static final String ANTIBANDING_AUTO = "auto"; 1165 public static final String ANTIBANDING_50HZ = "50hz"; 1166 public static final String ANTIBANDING_60HZ = "60hz"; 1167 public static final String ANTIBANDING_OFF = "off"; 1168 1169 // Values for flash mode settings. 1170 /** 1171 * Flash will not be fired. 1172 */ 1173 public static final String FLASH_MODE_OFF = "off"; 1174 1175 /** 1176 * Flash will be fired automatically when required. The flash may be fired 1177 * during preview, auto-focus, or snapshot depending on the driver. 1178 */ 1179 public static final String FLASH_MODE_AUTO = "auto"; 1180 1181 /** 1182 * Flash will always be fired during snapshot. The flash may also be 1183 * fired during preview or auto-focus depending on the driver. 1184 */ 1185 public static final String FLASH_MODE_ON = "on"; 1186 1187 /** 1188 * Flash will be fired in red-eye reduction mode. 1189 */ 1190 public static final String FLASH_MODE_RED_EYE = "red-eye"; 1191 1192 /** 1193 * Constant emission of light during preview, auto-focus and snapshot. 1194 * This can also be used for video recording. 1195 */ 1196 public static final String FLASH_MODE_TORCH = "torch"; 1197 1198 /** 1199 * Scene mode is off. 1200 */ 1201 public static final String SCENE_MODE_AUTO = "auto"; 1202 1203 /** 1204 * Take photos of fast moving objects. Same as {@link 1205 * #SCENE_MODE_SPORTS}. 1206 */ 1207 public static final String SCENE_MODE_ACTION = "action"; 1208 1209 /** 1210 * Take people pictures. 1211 */ 1212 public static final String SCENE_MODE_PORTRAIT = "portrait"; 1213 1214 /** 1215 * Take pictures on distant objects. 1216 */ 1217 public static final String SCENE_MODE_LANDSCAPE = "landscape"; 1218 1219 /** 1220 * Take photos at night. 1221 */ 1222 public static final String SCENE_MODE_NIGHT = "night"; 1223 1224 /** 1225 * Take people pictures at night. 1226 */ 1227 public static final String SCENE_MODE_NIGHT_PORTRAIT = "night-portrait"; 1228 1229 /** 1230 * Take photos in a theater. Flash light is off. 1231 */ 1232 public static final String SCENE_MODE_THEATRE = "theatre"; 1233 1234 /** 1235 * Take pictures on the beach. 1236 */ 1237 public static final String SCENE_MODE_BEACH = "beach"; 1238 1239 /** 1240 * Take pictures on the snow. 1241 */ 1242 public static final String SCENE_MODE_SNOW = "snow"; 1243 1244 /** 1245 * Take sunset photos. 1246 */ 1247 public static final String SCENE_MODE_SUNSET = "sunset"; 1248 1249 /** 1250 * Avoid blurry pictures (for example, due to hand shake). 1251 */ 1252 public static final String SCENE_MODE_STEADYPHOTO = "steadyphoto"; 1253 1254 /** 1255 * For shooting firework displays. 1256 */ 1257 public static final String SCENE_MODE_FIREWORKS = "fireworks"; 1258 1259 /** 1260 * Take photos of fast moving objects. Same as {@link 1261 * #SCENE_MODE_ACTION}. 1262 */ 1263 public static final String SCENE_MODE_SPORTS = "sports"; 1264 1265 /** 1266 * Take indoor low-light shot. 1267 */ 1268 public static final String SCENE_MODE_PARTY = "party"; 1269 1270 /** 1271 * Capture the naturally warm color of scenes lit by candles. 1272 */ 1273 public static final String SCENE_MODE_CANDLELIGHT = "candlelight"; 1274 1275 /** 1276 * Applications are looking for a barcode. Camera driver will be 1277 * optimized for barcode reading. 1278 */ 1279 public static final String SCENE_MODE_BARCODE = "barcode"; 1280 1281 /** 1282 * Auto-focus mode. Applications should call {@link 1283 * #autoFocus(AutoFocusCallback)} to start the focus in this mode. 1284 */ 1285 public static final String FOCUS_MODE_AUTO = "auto"; 1286 1287 /** 1288 * Focus is set at infinity. Applications should not call 1289 * {@link #autoFocus(AutoFocusCallback)} in this mode. 1290 */ 1291 public static final String FOCUS_MODE_INFINITY = "infinity"; 1292 1293 /** 1294 * Macro (close-up) focus mode. Applications should call 1295 * {@link #autoFocus(AutoFocusCallback)} to start the focus in this 1296 * mode. 1297 */ 1298 public static final String FOCUS_MODE_MACRO = "macro"; 1299 1300 /** 1301 * Focus is fixed. The camera is always in this mode if the focus is not 1302 * adjustable. If the camera has auto-focus, this mode can fix the 1303 * focus, which is usually at hyperfocal distance. Applications should 1304 * not call {@link #autoFocus(AutoFocusCallback)} in this mode. 1305 */ 1306 public static final String FOCUS_MODE_FIXED = "fixed"; 1307 1308 /** 1309 * Extended depth of field (EDOF). Focusing is done digitally and 1310 * continuously. Applications should not call {@link 1311 * #autoFocus(AutoFocusCallback)} in this mode. 1312 */ 1313 public static final String FOCUS_MODE_EDOF = "edof"; 1314 1315 /** 1316 * Continuous auto focus mode intended for video recording. The camera 1317 * continuously tries to focus. This is ideal for shooting video. 1318 * Applications still can call {@link 1319 * #takePicture(Camera.ShutterCallback, Camera.PictureCallback, 1320 * Camera.PictureCallback)} in this mode but the subject may not be in 1321 * focus. Auto focus starts when the parameter is set. Applications 1322 * should not call {@link #autoFocus(AutoFocusCallback)} in this mode. 1323 * To stop continuous focus, applications should change the focus mode 1324 * to other modes. 1325 */ 1326 public static final String FOCUS_MODE_CONTINUOUS_VIDEO = "continuous-video"; 1327 1328 // Indices for focus distance array. 1329 /** 1330 * The array index of near focus distance for use with 1331 * {@link #getFocusDistances(float[])}. 1332 */ 1333 public static final int FOCUS_DISTANCE_NEAR_INDEX = 0; 1334 1335 /** 1336 * The array index of optimal focus distance for use with 1337 * {@link #getFocusDistances(float[])}. 1338 */ 1339 public static final int FOCUS_DISTANCE_OPTIMAL_INDEX = 1; 1340 1341 /** 1342 * The array index of far focus distance for use with 1343 * {@link #getFocusDistances(float[])}. 1344 */ 1345 public static final int FOCUS_DISTANCE_FAR_INDEX = 2; 1346 1347 /** 1348 * The array index of minimum preview fps for use with {@link 1349 * #getPreviewFpsRange(int[])} or {@link 1350 * #getSupportedPreviewFpsRange()}. 1351 */ 1352 public static final int PREVIEW_FPS_MIN_INDEX = 0; 1353 1354 /** 1355 * The array index of maximum preview fps for use with {@link 1356 * #getPreviewFpsRange(int[])} or {@link 1357 * #getSupportedPreviewFpsRange()}. 1358 */ 1359 public static final int PREVIEW_FPS_MAX_INDEX = 1; 1360 1361 // Formats for setPreviewFormat and setPictureFormat. 1362 private static final String PIXEL_FORMAT_YUV422SP = "yuv422sp"; 1363 private static final String PIXEL_FORMAT_YUV420SP = "yuv420sp"; 1364 private static final String PIXEL_FORMAT_YUV422I = "yuv422i-yuyv"; 1365 private static final String PIXEL_FORMAT_RGB565 = "rgb565"; 1366 private static final String PIXEL_FORMAT_JPEG = "jpeg"; 1367 1368 private HashMap<String, String> mMap; 1369 1370 private Parameters() { 1371 mMap = new HashMap<String, String>(); 1372 } 1373 1374 /** 1375 * Writes the current Parameters to the log. 1376 * @hide 1377 * @deprecated 1378 */ 1379 public void dump() { 1380 Log.e(TAG, "dump: size=" + mMap.size()); 1381 for (String k : mMap.keySet()) { 1382 Log.e(TAG, "dump: " + k + "=" + mMap.get(k)); 1383 } 1384 } 1385 1386 /** 1387 * Creates a single string with all the parameters set in 1388 * this Parameters object. 1389 * <p>The {@link #unflatten(String)} method does the reverse.</p> 1390 * 1391 * @return a String with all values from this Parameters object, in 1392 * semi-colon delimited key-value pairs 1393 */ 1394 public String flatten() { 1395 StringBuilder flattened = new StringBuilder(); 1396 for (String k : mMap.keySet()) { 1397 flattened.append(k); 1398 flattened.append("="); 1399 flattened.append(mMap.get(k)); 1400 flattened.append(";"); 1401 } 1402 // chop off the extra semicolon at the end 1403 flattened.deleteCharAt(flattened.length()-1); 1404 return flattened.toString(); 1405 } 1406 1407 /** 1408 * Takes a flattened string of parameters and adds each one to 1409 * this Parameters object. 1410 * <p>The {@link #flatten()} method does the reverse.</p> 1411 * 1412 * @param flattened a String of parameters (key-value paired) that 1413 * are semi-colon delimited 1414 */ 1415 public void unflatten(String flattened) { 1416 mMap.clear(); 1417 1418 StringTokenizer tokenizer = new StringTokenizer(flattened, ";"); 1419 while (tokenizer.hasMoreElements()) { 1420 String kv = tokenizer.nextToken(); 1421 int pos = kv.indexOf('='); 1422 if (pos == -1) { 1423 continue; 1424 } 1425 String k = kv.substring(0, pos); 1426 String v = kv.substring(pos + 1); 1427 mMap.put(k, v); 1428 } 1429 } 1430 1431 public void remove(String key) { 1432 mMap.remove(key); 1433 } 1434 1435 /** 1436 * Sets a String parameter. 1437 * 1438 * @param key the key name for the parameter 1439 * @param value the String value of the parameter 1440 */ 1441 public void set(String key, String value) { 1442 if (key.indexOf('=') != -1 || key.indexOf(';') != -1) { 1443 Log.e(TAG, "Key \"" + key + "\" contains invalid character (= or ;)"); 1444 return; 1445 } 1446 if (value.indexOf('=') != -1 || value.indexOf(';') != -1) { 1447 Log.e(TAG, "Value \"" + value + "\" contains invalid character (= or ;)"); 1448 return; 1449 } 1450 1451 mMap.put(key, value); 1452 } 1453 1454 /** 1455 * Sets an integer parameter. 1456 * 1457 * @param key the key name for the parameter 1458 * @param value the int value of the parameter 1459 */ 1460 public void set(String key, int value) { 1461 mMap.put(key, Integer.toString(value)); 1462 } 1463 1464 /** 1465 * Returns the value of a String parameter. 1466 * 1467 * @param key the key name for the parameter 1468 * @return the String value of the parameter 1469 */ 1470 public String get(String key) { 1471 return mMap.get(key); 1472 } 1473 1474 /** 1475 * Returns the value of an integer parameter. 1476 * 1477 * @param key the key name for the parameter 1478 * @return the int value of the parameter 1479 */ 1480 public int getInt(String key) { 1481 return Integer.parseInt(mMap.get(key)); 1482 } 1483 1484 /** 1485 * Sets the dimensions for preview pictures. 1486 * 1487 * The sides of width and height are based on camera orientation. That 1488 * is, the preview size is the size before it is rotated by display 1489 * orientation. So applications need to consider the display orientation 1490 * while setting preview size. For example, suppose the camera supports 1491 * both 480x320 and 320x480 preview sizes. The application wants a 3:2 1492 * preview ratio. If the display orientation is set to 0 or 180, preview 1493 * size should be set to 480x320. If the display orientation is set to 1494 * 90 or 270, preview size should be set to 320x480. The display 1495 * orientation should also be considered while setting picture size and 1496 * thumbnail size. 1497 * 1498 * @param width the width of the pictures, in pixels 1499 * @param height the height of the pictures, in pixels 1500 * @see #setDisplayOrientation(int) 1501 * @see #getCameraInfo(int, CameraInfo) 1502 * @see #setPictureSize(int, int) 1503 * @see #setJpegThumbnailSize(int, int) 1504 */ 1505 public void setPreviewSize(int width, int height) { 1506 String v = Integer.toString(width) + "x" + Integer.toString(height); 1507 set(KEY_PREVIEW_SIZE, v); 1508 } 1509 1510 /** 1511 * Returns the dimensions setting for preview pictures. 1512 * 1513 * @return a Size object with the width and height setting 1514 * for the preview picture 1515 */ 1516 public Size getPreviewSize() { 1517 String pair = get(KEY_PREVIEW_SIZE); 1518 return strToSize(pair); 1519 } 1520 1521 /** 1522 * Gets the supported preview sizes. 1523 * 1524 * @return a list of Size object. This method will always return a list 1525 * with at least one element. 1526 */ 1527 public List<Size> getSupportedPreviewSizes() { 1528 String str = get(KEY_PREVIEW_SIZE + SUPPORTED_VALUES_SUFFIX); 1529 return splitSize(str); 1530 } 1531 1532 /** 1533 * Gets the supported video frame sizes that can be used by 1534 * MediaRecorder. 1535 * 1536 * If the returned list is not null, the returned list will contain at 1537 * least one Size and one of the sizes in the returned list must be 1538 * passed to MediaRecorder.setVideoSize() for camcorder application if 1539 * camera is used as the video source. In this case, the size of the 1540 * preview can be different from the resolution of the recorded video 1541 * during video recording. 1542 * 1543 * @return a list of Size object if camera has separate preview and 1544 * video output; otherwise, null is returned. 1545 * @see #getPreferredPreviewSizeForVideo() 1546 */ 1547 public List<Size> getSupportedVideoSizes() { 1548 String str = get(KEY_VIDEO_SIZE + SUPPORTED_VALUES_SUFFIX); 1549 return splitSize(str); 1550 } 1551 1552 /** 1553 * Returns the preferred or recommended preview size (width and height) 1554 * in pixels for video recording. Camcorder applications should 1555 * set the preview size to a value that is not larger than the 1556 * preferred preview size. In other words, the product of the width 1557 * and height of the preview size should not be larger than that of 1558 * the preferred preview size. In addition, we recommend to choose a 1559 * preview size that has the same aspect ratio as the resolution of 1560 * video to be recorded. 1561 * 1562 * @return the preferred preview size (width and height) in pixels for 1563 * video recording if getSupportedVideoSizes() does not return 1564 * null; otherwise, null is returned. 1565 * @see #getSupportedVideoSizes() 1566 */ 1567 public Size getPreferredPreviewSizeForVideo() { 1568 String pair = get(KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO); 1569 return strToSize(pair); 1570 } 1571 1572 /** 1573 * Sets the dimensions for EXIF thumbnail in Jpeg picture. If 1574 * applications set both width and height to 0, EXIF will not contain 1575 * thumbnail. 1576 * 1577 * Applications need to consider the display orientation. See {@link 1578 * #setPreviewSize(int,int)} for reference. 1579 * 1580 * @param width the width of the thumbnail, in pixels 1581 * @param height the height of the thumbnail, in pixels 1582 * @see #setPreviewSize(int,int) 1583 */ 1584 public void setJpegThumbnailSize(int width, int height) { 1585 set(KEY_JPEG_THUMBNAIL_WIDTH, width); 1586 set(KEY_JPEG_THUMBNAIL_HEIGHT, height); 1587 } 1588 1589 /** 1590 * Returns the dimensions for EXIF thumbnail in Jpeg picture. 1591 * 1592 * @return a Size object with the height and width setting for the EXIF 1593 * thumbnails 1594 */ 1595 public Size getJpegThumbnailSize() { 1596 return new Size(getInt(KEY_JPEG_THUMBNAIL_WIDTH), 1597 getInt(KEY_JPEG_THUMBNAIL_HEIGHT)); 1598 } 1599 1600 /** 1601 * Gets the supported jpeg thumbnail sizes. 1602 * 1603 * @return a list of Size object. This method will always return a list 1604 * with at least two elements. Size 0,0 (no thumbnail) is always 1605 * supported. 1606 */ 1607 public List<Size> getSupportedJpegThumbnailSizes() { 1608 String str = get(KEY_JPEG_THUMBNAIL_SIZE + SUPPORTED_VALUES_SUFFIX); 1609 return splitSize(str); 1610 } 1611 1612 /** 1613 * Sets the quality of the EXIF thumbnail in Jpeg picture. 1614 * 1615 * @param quality the JPEG quality of the EXIF thumbnail. The range is 1 1616 * to 100, with 100 being the best. 1617 */ 1618 public void setJpegThumbnailQuality(int quality) { 1619 set(KEY_JPEG_THUMBNAIL_QUALITY, quality); 1620 } 1621 1622 /** 1623 * Returns the quality setting for the EXIF thumbnail in Jpeg picture. 1624 * 1625 * @return the JPEG quality setting of the EXIF thumbnail. 1626 */ 1627 public int getJpegThumbnailQuality() { 1628 return getInt(KEY_JPEG_THUMBNAIL_QUALITY); 1629 } 1630 1631 /** 1632 * Sets Jpeg quality of captured picture. 1633 * 1634 * @param quality the JPEG quality of captured picture. The range is 1 1635 * to 100, with 100 being the best. 1636 */ 1637 public void setJpegQuality(int quality) { 1638 set(KEY_JPEG_QUALITY, quality); 1639 } 1640 1641 /** 1642 * Returns the quality setting for the JPEG picture. 1643 * 1644 * @return the JPEG picture quality setting. 1645 */ 1646 public int getJpegQuality() { 1647 return getInt(KEY_JPEG_QUALITY); 1648 } 1649 1650 /** 1651 * Sets the rate at which preview frames are received. This is the 1652 * target frame rate. The actual frame rate depends on the driver. 1653 * 1654 * @param fps the frame rate (frames per second) 1655 * @deprecated replaced by {@link #setPreviewFpsRange(int,int)} 1656 */ 1657 @Deprecated 1658 public void setPreviewFrameRate(int fps) { 1659 set(KEY_PREVIEW_FRAME_RATE, fps); 1660 } 1661 1662 /** 1663 * Returns the setting for the rate at which preview frames are 1664 * received. This is the target frame rate. The actual frame rate 1665 * depends on the driver. 1666 * 1667 * @return the frame rate setting (frames per second) 1668 * @deprecated replaced by {@link #getPreviewFpsRange(int[])} 1669 */ 1670 @Deprecated 1671 public int getPreviewFrameRate() { 1672 return getInt(KEY_PREVIEW_FRAME_RATE); 1673 } 1674 1675 /** 1676 * Gets the supported preview frame rates. 1677 * 1678 * @return a list of supported preview frame rates. null if preview 1679 * frame rate setting is not supported. 1680 * @deprecated replaced by {@link #getSupportedPreviewFpsRange()} 1681 */ 1682 @Deprecated 1683 public List<Integer> getSupportedPreviewFrameRates() { 1684 String str = get(KEY_PREVIEW_FRAME_RATE + SUPPORTED_VALUES_SUFFIX); 1685 return splitInt(str); 1686 } 1687 1688 /** 1689 * Sets the maximum and maximum preview fps. This controls the rate of 1690 * preview frames received in {@link PreviewCallback}. The minimum and 1691 * maximum preview fps must be one of the elements from {@link 1692 * #getSupportedPreviewFpsRange}. 1693 * 1694 * @param min the minimum preview fps (scaled by 1000). 1695 * @param max the maximum preview fps (scaled by 1000). 1696 * @throws RuntimeException if fps range is invalid. 1697 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 1698 * @see #getSupportedPreviewFpsRange() 1699 */ 1700 public void setPreviewFpsRange(int min, int max) { 1701 set(KEY_PREVIEW_FPS_RANGE, "" + min + "," + max); 1702 } 1703 1704 /** 1705 * Returns the current minimum and maximum preview fps. The values are 1706 * one of the elements returned by {@link #getSupportedPreviewFpsRange}. 1707 * 1708 * @return range the minimum and maximum preview fps (scaled by 1000). 1709 * @see #PREVIEW_FPS_MIN_INDEX 1710 * @see #PREVIEW_FPS_MAX_INDEX 1711 * @see #getSupportedPreviewFpsRange() 1712 */ 1713 public void getPreviewFpsRange(int[] range) { 1714 if (range == null || range.length != 2) { 1715 throw new IllegalArgumentException( 1716 "range must be an array with two elements."); 1717 } 1718 splitInt(get(KEY_PREVIEW_FPS_RANGE), range); 1719 } 1720 1721 /** 1722 * Gets the supported preview fps (frame-per-second) ranges. Each range 1723 * contains a minimum fps and maximum fps. If minimum fps equals to 1724 * maximum fps, the camera outputs frames in fixed frame rate. If not, 1725 * the camera outputs frames in auto frame rate. The actual frame rate 1726 * fluctuates between the minimum and the maximum. The values are 1727 * multiplied by 1000 and represented in integers. For example, if frame 1728 * rate is 26.623 frames per second, the value is 26623. 1729 * 1730 * @return a list of supported preview fps ranges. This method returns a 1731 * list with at least one element. Every element is an int array 1732 * of two values - minimum fps and maximum fps. The list is 1733 * sorted from small to large (first by maximum fps and then 1734 * minimum fps). 1735 * @see #PREVIEW_FPS_MIN_INDEX 1736 * @see #PREVIEW_FPS_MAX_INDEX 1737 */ 1738 public List<int[]> getSupportedPreviewFpsRange() { 1739 String str = get(KEY_PREVIEW_FPS_RANGE + SUPPORTED_VALUES_SUFFIX); 1740 return splitRange(str); 1741 } 1742 1743 /** 1744 * Sets the image format for preview pictures. 1745 * <p>If this is never called, the default format will be 1746 * {@link android.graphics.ImageFormat#NV21}, which 1747 * uses the NV21 encoding format.</p> 1748 * 1749 * @param pixel_format the desired preview picture format, defined 1750 * by one of the {@link android.graphics.ImageFormat} constants. 1751 * (E.g., <var>ImageFormat.NV21</var> (default), 1752 * <var>ImageFormat.RGB_565</var>, or 1753 * <var>ImageFormat.JPEG</var>) 1754 * @see android.graphics.ImageFormat 1755 */ 1756 public void setPreviewFormat(int pixel_format) { 1757 String s = cameraFormatForPixelFormat(pixel_format); 1758 if (s == null) { 1759 throw new IllegalArgumentException( 1760 "Invalid pixel_format=" + pixel_format); 1761 } 1762 1763 set(KEY_PREVIEW_FORMAT, s); 1764 } 1765 1766 /** 1767 * Returns the image format for preview frames got from 1768 * {@link PreviewCallback}. 1769 * 1770 * @return the preview format. 1771 * @see android.graphics.ImageFormat 1772 */ 1773 public int getPreviewFormat() { 1774 return pixelFormatForCameraFormat(get(KEY_PREVIEW_FORMAT)); 1775 } 1776 1777 /** 1778 * Gets the supported preview formats. 1779 * 1780 * @return a list of supported preview formats. This method will always 1781 * return a list with at least one element. 1782 * @see android.graphics.ImageFormat 1783 */ 1784 public List<Integer> getSupportedPreviewFormats() { 1785 String str = get(KEY_PREVIEW_FORMAT + SUPPORTED_VALUES_SUFFIX); 1786 ArrayList<Integer> formats = new ArrayList<Integer>(); 1787 for (String s : split(str)) { 1788 int f = pixelFormatForCameraFormat(s); 1789 if (f == ImageFormat.UNKNOWN) continue; 1790 formats.add(f); 1791 } 1792 return formats; 1793 } 1794 1795 /** 1796 * Sets the dimensions for pictures. 1797 * 1798 * Applications need to consider the display orientation. See {@link 1799 * #setPreviewSize(int,int)} for reference. 1800 * 1801 * @param width the width for pictures, in pixels 1802 * @param height the height for pictures, in pixels 1803 * @see #setPreviewSize(int,int) 1804 * 1805 */ 1806 public void setPictureSize(int width, int height) { 1807 String v = Integer.toString(width) + "x" + Integer.toString(height); 1808 set(KEY_PICTURE_SIZE, v); 1809 } 1810 1811 /** 1812 * Returns the dimension setting for pictures. 1813 * 1814 * @return a Size object with the height and width setting 1815 * for pictures 1816 */ 1817 public Size getPictureSize() { 1818 String pair = get(KEY_PICTURE_SIZE); 1819 return strToSize(pair); 1820 } 1821 1822 /** 1823 * Gets the supported picture sizes. 1824 * 1825 * @return a list of supported picture sizes. This method will always 1826 * return a list with at least one element. 1827 */ 1828 public List<Size> getSupportedPictureSizes() { 1829 String str = get(KEY_PICTURE_SIZE + SUPPORTED_VALUES_SUFFIX); 1830 return splitSize(str); 1831 } 1832 1833 /** 1834 * Sets the image format for pictures. 1835 * 1836 * @param pixel_format the desired picture format 1837 * (<var>ImageFormat.NV21</var>, 1838 * <var>ImageFormat.RGB_565</var>, or 1839 * <var>ImageFormat.JPEG</var>) 1840 * @see android.graphics.ImageFormat 1841 */ 1842 public void setPictureFormat(int pixel_format) { 1843 String s = cameraFormatForPixelFormat(pixel_format); 1844 if (s == null) { 1845 throw new IllegalArgumentException( 1846 "Invalid pixel_format=" + pixel_format); 1847 } 1848 1849 set(KEY_PICTURE_FORMAT, s); 1850 } 1851 1852 /** 1853 * Returns the image format for pictures. 1854 * 1855 * @return the picture format 1856 * @see android.graphics.ImageFormat 1857 */ 1858 public int getPictureFormat() { 1859 return pixelFormatForCameraFormat(get(KEY_PICTURE_FORMAT)); 1860 } 1861 1862 /** 1863 * Gets the supported picture formats. 1864 * 1865 * @return supported picture formats. This method will always return a 1866 * list with at least one element. 1867 * @see android.graphics.ImageFormat 1868 */ 1869 public List<Integer> getSupportedPictureFormats() { 1870 String str = get(KEY_PICTURE_FORMAT + SUPPORTED_VALUES_SUFFIX); 1871 ArrayList<Integer> formats = new ArrayList<Integer>(); 1872 for (String s : split(str)) { 1873 int f = pixelFormatForCameraFormat(s); 1874 if (f == ImageFormat.UNKNOWN) continue; 1875 formats.add(f); 1876 } 1877 return formats; 1878 } 1879 1880 private String cameraFormatForPixelFormat(int pixel_format) { 1881 switch(pixel_format) { 1882 case ImageFormat.NV16: return PIXEL_FORMAT_YUV422SP; 1883 case ImageFormat.NV21: return PIXEL_FORMAT_YUV420SP; 1884 case ImageFormat.YUY2: return PIXEL_FORMAT_YUV422I; 1885 case ImageFormat.RGB_565: return PIXEL_FORMAT_RGB565; 1886 case ImageFormat.JPEG: return PIXEL_FORMAT_JPEG; 1887 default: return null; 1888 } 1889 } 1890 1891 private int pixelFormatForCameraFormat(String format) { 1892 if (format == null) 1893 return ImageFormat.UNKNOWN; 1894 1895 if (format.equals(PIXEL_FORMAT_YUV422SP)) 1896 return ImageFormat.NV16; 1897 1898 if (format.equals(PIXEL_FORMAT_YUV420SP)) 1899 return ImageFormat.NV21; 1900 1901 if (format.equals(PIXEL_FORMAT_YUV422I)) 1902 return ImageFormat.YUY2; 1903 1904 if (format.equals(PIXEL_FORMAT_RGB565)) 1905 return ImageFormat.RGB_565; 1906 1907 if (format.equals(PIXEL_FORMAT_JPEG)) 1908 return ImageFormat.JPEG; 1909 1910 return ImageFormat.UNKNOWN; 1911 } 1912 1913 /** 1914 * Sets the rotation angle in degrees relative to the orientation of 1915 * the camera. This affects the pictures returned from JPEG {@link 1916 * PictureCallback}. The camera driver may set orientation in the 1917 * EXIF header without rotating the picture. Or the driver may rotate 1918 * the picture and the EXIF thumbnail. If the Jpeg picture is rotated, 1919 * the orientation in the EXIF header will be missing or 1 (row #0 is 1920 * top and column #0 is left side). 1921 * 1922 * <p>If applications want to rotate the picture to match the orientation 1923 * of what users see, apps should use {@link 1924 * android.view.OrientationEventListener} and {@link CameraInfo}. 1925 * The value from OrientationEventListener is relative to the natural 1926 * orientation of the device. CameraInfo.orientation is the angle 1927 * between camera orientation and natural device orientation. The sum 1928 * of the two is the rotation angle for back-facing camera. The 1929 * difference of the two is the rotation angle for front-facing camera. 1930 * Note that the JPEG pictures of front-facing cameras are not mirrored 1931 * as in preview display. 1932 * 1933 * <p>For example, suppose the natural orientation of the device is 1934 * portrait. The device is rotated 270 degrees clockwise, so the device 1935 * orientation is 270. Suppose a back-facing camera sensor is mounted in 1936 * landscape and the top side of the camera sensor is aligned with the 1937 * right edge of the display in natural orientation. So the camera 1938 * orientation is 90. The rotation should be set to 0 (270 + 90). 1939 * 1940 * <p>The reference code is as follows. 1941 * 1942 * <pre> 1943 * public void public void onOrientationChanged(int orientation) { 1944 * if (orientation == ORIENTATION_UNKNOWN) return; 1945 * android.hardware.Camera.CameraInfo info = 1946 * new android.hardware.Camera.CameraInfo(); 1947 * android.hardware.Camera.getCameraInfo(cameraId, info); 1948 * orientation = (orientation + 45) / 90 * 90; 1949 * int rotation = 0; 1950 * if (info.facing == CameraInfo.CAMERA_FACING_FRONT) { 1951 * rotation = (info.orientation - orientation + 360) % 360; 1952 * } else { // back-facing camera 1953 * rotation = (info.orientation + orientation) % 360; 1954 * } 1955 * mParameters.setRotation(rotation); 1956 * } 1957 * </pre> 1958 * 1959 * @param rotation The rotation angle in degrees relative to the 1960 * orientation of the camera. Rotation can only be 0, 1961 * 90, 180 or 270. 1962 * @throws IllegalArgumentException if rotation value is invalid. 1963 * @see android.view.OrientationEventListener 1964 * @see #getCameraInfo(int, CameraInfo) 1965 */ 1966 public void setRotation(int rotation) { 1967 if (rotation == 0 || rotation == 90 || rotation == 180 1968 || rotation == 270) { 1969 set(KEY_ROTATION, Integer.toString(rotation)); 1970 } else { 1971 throw new IllegalArgumentException( 1972 "Invalid rotation=" + rotation); 1973 } 1974 } 1975 1976 /** 1977 * Sets GPS latitude coordinate. This will be stored in JPEG EXIF 1978 * header. 1979 * 1980 * @param latitude GPS latitude coordinate. 1981 */ 1982 public void setGpsLatitude(double latitude) { 1983 set(KEY_GPS_LATITUDE, Double.toString(latitude)); 1984 } 1985 1986 /** 1987 * Sets GPS longitude coordinate. This will be stored in JPEG EXIF 1988 * header. 1989 * 1990 * @param longitude GPS longitude coordinate. 1991 */ 1992 public void setGpsLongitude(double longitude) { 1993 set(KEY_GPS_LONGITUDE, Double.toString(longitude)); 1994 } 1995 1996 /** 1997 * Sets GPS altitude. This will be stored in JPEG EXIF header. 1998 * 1999 * @param altitude GPS altitude in meters. 2000 */ 2001 public void setGpsAltitude(double altitude) { 2002 set(KEY_GPS_ALTITUDE, Double.toString(altitude)); 2003 } 2004 2005 /** 2006 * Sets GPS timestamp. This will be stored in JPEG EXIF header. 2007 * 2008 * @param timestamp GPS timestamp (UTC in seconds since January 1, 2009 * 1970). 2010 */ 2011 public void setGpsTimestamp(long timestamp) { 2012 set(KEY_GPS_TIMESTAMP, Long.toString(timestamp)); 2013 } 2014 2015 /** 2016 * Sets GPS processing method. It will store up to 32 characters 2017 * in JPEG EXIF header. 2018 * 2019 * @param processing_method The processing method to get this location. 2020 */ 2021 public void setGpsProcessingMethod(String processing_method) { 2022 set(KEY_GPS_PROCESSING_METHOD, processing_method); 2023 } 2024 2025 /** 2026 * Removes GPS latitude, longitude, altitude, and timestamp from the 2027 * parameters. 2028 */ 2029 public void removeGpsData() { 2030 remove(KEY_GPS_LATITUDE); 2031 remove(KEY_GPS_LONGITUDE); 2032 remove(KEY_GPS_ALTITUDE); 2033 remove(KEY_GPS_TIMESTAMP); 2034 remove(KEY_GPS_PROCESSING_METHOD); 2035 } 2036 2037 /** 2038 * Gets the current white balance setting. 2039 * 2040 * @return current white balance. null if white balance setting is not 2041 * supported. 2042 * @see #WHITE_BALANCE_AUTO 2043 * @see #WHITE_BALANCE_INCANDESCENT 2044 * @see #WHITE_BALANCE_FLUORESCENT 2045 * @see #WHITE_BALANCE_WARM_FLUORESCENT 2046 * @see #WHITE_BALANCE_DAYLIGHT 2047 * @see #WHITE_BALANCE_CLOUDY_DAYLIGHT 2048 * @see #WHITE_BALANCE_TWILIGHT 2049 * @see #WHITE_BALANCE_SHADE 2050 * 2051 */ 2052 public String getWhiteBalance() { 2053 return get(KEY_WHITE_BALANCE); 2054 } 2055 2056 /** 2057 * Sets the white balance. 2058 * 2059 * @param value new white balance. 2060 * @see #getWhiteBalance() 2061 */ 2062 public void setWhiteBalance(String value) { 2063 set(KEY_WHITE_BALANCE, value); 2064 } 2065 2066 /** 2067 * Gets the supported white balance. 2068 * 2069 * @return a list of supported white balance. null if white balance 2070 * setting is not supported. 2071 * @see #getWhiteBalance() 2072 */ 2073 public List<String> getSupportedWhiteBalance() { 2074 String str = get(KEY_WHITE_BALANCE + SUPPORTED_VALUES_SUFFIX); 2075 return split(str); 2076 } 2077 2078 /** 2079 * Gets the current color effect setting. 2080 * 2081 * @return current color effect. null if color effect 2082 * setting is not supported. 2083 * @see #EFFECT_NONE 2084 * @see #EFFECT_MONO 2085 * @see #EFFECT_NEGATIVE 2086 * @see #EFFECT_SOLARIZE 2087 * @see #EFFECT_SEPIA 2088 * @see #EFFECT_POSTERIZE 2089 * @see #EFFECT_WHITEBOARD 2090 * @see #EFFECT_BLACKBOARD 2091 * @see #EFFECT_AQUA 2092 */ 2093 public String getColorEffect() { 2094 return get(KEY_EFFECT); 2095 } 2096 2097 /** 2098 * Sets the current color effect setting. 2099 * 2100 * @param value new color effect. 2101 * @see #getColorEffect() 2102 */ 2103 public void setColorEffect(String value) { 2104 set(KEY_EFFECT, value); 2105 } 2106 2107 /** 2108 * Gets the supported color effects. 2109 * 2110 * @return a list of supported color effects. null if color effect 2111 * setting is not supported. 2112 * @see #getColorEffect() 2113 */ 2114 public List<String> getSupportedColorEffects() { 2115 String str = get(KEY_EFFECT + SUPPORTED_VALUES_SUFFIX); 2116 return split(str); 2117 } 2118 2119 2120 /** 2121 * Gets the current antibanding setting. 2122 * 2123 * @return current antibanding. null if antibanding setting is not 2124 * supported. 2125 * @see #ANTIBANDING_AUTO 2126 * @see #ANTIBANDING_50HZ 2127 * @see #ANTIBANDING_60HZ 2128 * @see #ANTIBANDING_OFF 2129 */ 2130 public String getAntibanding() { 2131 return get(KEY_ANTIBANDING); 2132 } 2133 2134 /** 2135 * Sets the antibanding. 2136 * 2137 * @param antibanding new antibanding value. 2138 * @see #getAntibanding() 2139 */ 2140 public void setAntibanding(String antibanding) { 2141 set(KEY_ANTIBANDING, antibanding); 2142 } 2143 2144 /** 2145 * Gets the supported antibanding values. 2146 * 2147 * @return a list of supported antibanding values. null if antibanding 2148 * setting is not supported. 2149 * @see #getAntibanding() 2150 */ 2151 public List<String> getSupportedAntibanding() { 2152 String str = get(KEY_ANTIBANDING + SUPPORTED_VALUES_SUFFIX); 2153 return split(str); 2154 } 2155 2156 /** 2157 * Gets the current scene mode setting. 2158 * 2159 * @return one of SCENE_MODE_XXX string constant. null if scene mode 2160 * setting is not supported. 2161 * @see #SCENE_MODE_AUTO 2162 * @see #SCENE_MODE_ACTION 2163 * @see #SCENE_MODE_PORTRAIT 2164 * @see #SCENE_MODE_LANDSCAPE 2165 * @see #SCENE_MODE_NIGHT 2166 * @see #SCENE_MODE_NIGHT_PORTRAIT 2167 * @see #SCENE_MODE_THEATRE 2168 * @see #SCENE_MODE_BEACH 2169 * @see #SCENE_MODE_SNOW 2170 * @see #SCENE_MODE_SUNSET 2171 * @see #SCENE_MODE_STEADYPHOTO 2172 * @see #SCENE_MODE_FIREWORKS 2173 * @see #SCENE_MODE_SPORTS 2174 * @see #SCENE_MODE_PARTY 2175 * @see #SCENE_MODE_CANDLELIGHT 2176 */ 2177 public String getSceneMode() { 2178 return get(KEY_SCENE_MODE); 2179 } 2180 2181 /** 2182 * Sets the scene mode. Changing scene mode may override other 2183 * parameters (such as flash mode, focus mode, white balance). For 2184 * example, suppose originally flash mode is on and supported flash 2185 * modes are on/off. In night scene mode, both flash mode and supported 2186 * flash mode may be changed to off. After setting scene mode, 2187 * applications should call getParameters to know if some parameters are 2188 * changed. 2189 * 2190 * @param value scene mode. 2191 * @see #getSceneMode() 2192 */ 2193 public void setSceneMode(String value) { 2194 set(KEY_SCENE_MODE, value); 2195 } 2196 2197 /** 2198 * Gets the supported scene modes. 2199 * 2200 * @return a list of supported scene modes. null if scene mode setting 2201 * is not supported. 2202 * @see #getSceneMode() 2203 */ 2204 public List<String> getSupportedSceneModes() { 2205 String str = get(KEY_SCENE_MODE + SUPPORTED_VALUES_SUFFIX); 2206 return split(str); 2207 } 2208 2209 /** 2210 * Gets the current flash mode setting. 2211 * 2212 * @return current flash mode. null if flash mode setting is not 2213 * supported. 2214 * @see #FLASH_MODE_OFF 2215 * @see #FLASH_MODE_AUTO 2216 * @see #FLASH_MODE_ON 2217 * @see #FLASH_MODE_RED_EYE 2218 * @see #FLASH_MODE_TORCH 2219 */ 2220 public String getFlashMode() { 2221 return get(KEY_FLASH_MODE); 2222 } 2223 2224 /** 2225 * Sets the flash mode. 2226 * 2227 * @param value flash mode. 2228 * @see #getFlashMode() 2229 */ 2230 public void setFlashMode(String value) { 2231 set(KEY_FLASH_MODE, value); 2232 } 2233 2234 /** 2235 * Gets the supported flash modes. 2236 * 2237 * @return a list of supported flash modes. null if flash mode setting 2238 * is not supported. 2239 * @see #getFlashMode() 2240 */ 2241 public List<String> getSupportedFlashModes() { 2242 String str = get(KEY_FLASH_MODE + SUPPORTED_VALUES_SUFFIX); 2243 return split(str); 2244 } 2245 2246 /** 2247 * Gets the current focus mode setting. 2248 * 2249 * @return current focus mode. This method will always return a non-null 2250 * value. Applications should call {@link 2251 * #autoFocus(AutoFocusCallback)} to start the focus if focus 2252 * mode is FOCUS_MODE_AUTO or FOCUS_MODE_MACRO. 2253 * @see #FOCUS_MODE_AUTO 2254 * @see #FOCUS_MODE_INFINITY 2255 * @see #FOCUS_MODE_MACRO 2256 * @see #FOCUS_MODE_FIXED 2257 * @see #FOCUS_MODE_EDOF 2258 * @see #FOCUS_MODE_CONTINUOUS_VIDEO 2259 */ 2260 public String getFocusMode() { 2261 return get(KEY_FOCUS_MODE); 2262 } 2263 2264 /** 2265 * Sets the focus mode. 2266 * 2267 * @param value focus mode. 2268 * @see #getFocusMode() 2269 */ 2270 public void setFocusMode(String value) { 2271 set(KEY_FOCUS_MODE, value); 2272 } 2273 2274 /** 2275 * Gets the supported focus modes. 2276 * 2277 * @return a list of supported focus modes. This method will always 2278 * return a list with at least one element. 2279 * @see #getFocusMode() 2280 */ 2281 public List<String> getSupportedFocusModes() { 2282 String str = get(KEY_FOCUS_MODE + SUPPORTED_VALUES_SUFFIX); 2283 return split(str); 2284 } 2285 2286 /** 2287 * Gets the focal length (in millimeter) of the camera. 2288 * 2289 * @return the focal length. This method will always return a valid 2290 * value. 2291 */ 2292 public float getFocalLength() { 2293 return Float.parseFloat(get(KEY_FOCAL_LENGTH)); 2294 } 2295 2296 /** 2297 * Gets the horizontal angle of view in degrees. 2298 * 2299 * @return horizontal angle of view. This method will always return a 2300 * valid value. 2301 */ 2302 public float getHorizontalViewAngle() { 2303 return Float.parseFloat(get(KEY_HORIZONTAL_VIEW_ANGLE)); 2304 } 2305 2306 /** 2307 * Gets the vertical angle of view in degrees. 2308 * 2309 * @return vertical angle of view. This method will always return a 2310 * valid value. 2311 */ 2312 public float getVerticalViewAngle() { 2313 return Float.parseFloat(get(KEY_VERTICAL_VIEW_ANGLE)); 2314 } 2315 2316 /** 2317 * Gets the current exposure compensation index. 2318 * 2319 * @return current exposure compensation index. The range is {@link 2320 * #getMinExposureCompensation} to {@link 2321 * #getMaxExposureCompensation}. 0 means exposure is not 2322 * adjusted. 2323 */ 2324 public int getExposureCompensation() { 2325 return getInt(KEY_EXPOSURE_COMPENSATION, 0); 2326 } 2327 2328 /** 2329 * Sets the exposure compensation index. 2330 * 2331 * @param value exposure compensation index. The valid value range is 2332 * from {@link #getMinExposureCompensation} (inclusive) to {@link 2333 * #getMaxExposureCompensation} (inclusive). 0 means exposure is 2334 * not adjusted. Application should call 2335 * getMinExposureCompensation and getMaxExposureCompensation to 2336 * know if exposure compensation is supported. 2337 */ 2338 public void setExposureCompensation(int value) { 2339 set(KEY_EXPOSURE_COMPENSATION, value); 2340 } 2341 2342 /** 2343 * Gets the maximum exposure compensation index. 2344 * 2345 * @return maximum exposure compensation index (>=0). If both this 2346 * method and {@link #getMinExposureCompensation} return 0, 2347 * exposure compensation is not supported. 2348 */ 2349 public int getMaxExposureCompensation() { 2350 return getInt(KEY_MAX_EXPOSURE_COMPENSATION, 0); 2351 } 2352 2353 /** 2354 * Gets the minimum exposure compensation index. 2355 * 2356 * @return minimum exposure compensation index (<=0). If both this 2357 * method and {@link #getMaxExposureCompensation} return 0, 2358 * exposure compensation is not supported. 2359 */ 2360 public int getMinExposureCompensation() { 2361 return getInt(KEY_MIN_EXPOSURE_COMPENSATION, 0); 2362 } 2363 2364 /** 2365 * Gets the exposure compensation step. 2366 * 2367 * @return exposure compensation step. Applications can get EV by 2368 * multiplying the exposure compensation index and step. Ex: if 2369 * exposure compensation index is -6 and step is 0.333333333, EV 2370 * is -2. 2371 */ 2372 public float getExposureCompensationStep() { 2373 return getFloat(KEY_EXPOSURE_COMPENSATION_STEP, 0); 2374 } 2375 2376 /** 2377 * Gets current zoom value. This also works when smooth zoom is in 2378 * progress. Applications should check {@link #isZoomSupported} before 2379 * using this method. 2380 * 2381 * @return the current zoom value. The range is 0 to {@link 2382 * #getMaxZoom}. 0 means the camera is not zoomed. 2383 */ 2384 public int getZoom() { 2385 return getInt(KEY_ZOOM, 0); 2386 } 2387 2388 /** 2389 * Sets current zoom value. If the camera is zoomed (value > 0), the 2390 * actual picture size may be smaller than picture size setting. 2391 * Applications can check the actual picture size after picture is 2392 * returned from {@link PictureCallback}. The preview size remains the 2393 * same in zoom. Applications should check {@link #isZoomSupported} 2394 * before using this method. 2395 * 2396 * @param value zoom value. The valid range is 0 to {@link #getMaxZoom}. 2397 */ 2398 public void setZoom(int value) { 2399 set(KEY_ZOOM, value); 2400 } 2401 2402 /** 2403 * Returns true if zoom is supported. Applications should call this 2404 * before using other zoom methods. 2405 * 2406 * @return true if zoom is supported. 2407 */ 2408 public boolean isZoomSupported() { 2409 String str = get(KEY_ZOOM_SUPPORTED); 2410 return TRUE.equals(str); 2411 } 2412 2413 /** 2414 * Gets the maximum zoom value allowed for snapshot. This is the maximum 2415 * value that applications can set to {@link #setZoom(int)}. 2416 * Applications should call {@link #isZoomSupported} before using this 2417 * method. This value may change in different preview size. Applications 2418 * should call this again after setting preview size. 2419 * 2420 * @return the maximum zoom value supported by the camera. 2421 */ 2422 public int getMaxZoom() { 2423 return getInt(KEY_MAX_ZOOM, 0); 2424 } 2425 2426 /** 2427 * Gets the zoom ratios of all zoom values. Applications should check 2428 * {@link #isZoomSupported} before using this method. 2429 * 2430 * @return the zoom ratios in 1/100 increments. Ex: a zoom of 3.2x is 2431 * returned as 320. The number of elements is {@link 2432 * #getMaxZoom} + 1. The list is sorted from small to large. The 2433 * first element is always 100. The last element is the zoom 2434 * ratio of the maximum zoom value. 2435 */ 2436 public List<Integer> getZoomRatios() { 2437 return splitInt(get(KEY_ZOOM_RATIOS)); 2438 } 2439 2440 /** 2441 * Returns true if smooth zoom is supported. Applications should call 2442 * this before using other smooth zoom methods. 2443 * 2444 * @return true if smooth zoom is supported. 2445 */ 2446 public boolean isSmoothZoomSupported() { 2447 String str = get(KEY_SMOOTH_ZOOM_SUPPORTED); 2448 return TRUE.equals(str); 2449 } 2450 2451 /** 2452 * Gets the distances from the camera to where an object appears to be 2453 * in focus. The object is sharpest at the optimal focus distance. The 2454 * depth of field is the far focus distance minus near focus distance. 2455 * 2456 * Focus distances may change after calling {@link 2457 * #autoFocus(AutoFocusCallback)}, {@link #cancelAutoFocus}, or {@link 2458 * #startPreview()}. Applications can call {@link #getParameters()} 2459 * and this method anytime to get the latest focus distances. If the 2460 * focus mode is FOCUS_MODE_CONTINUOUS_VIDEO, focus distances may change 2461 * from time to time. 2462 * 2463 * This method is intended to estimate the distance between the camera 2464 * and the subject. After autofocus, the subject distance may be within 2465 * near and far focus distance. However, the precision depends on the 2466 * camera hardware, autofocus algorithm, the focus area, and the scene. 2467 * The error can be large and it should be only used as a reference. 2468 * 2469 * Far focus distance >= optimal focus distance >= near focus distance. 2470 * If the focus distance is infinity, the value will be 2471 * Float.POSITIVE_INFINITY. 2472 * 2473 * @param output focus distances in meters. output must be a float 2474 * array with three elements. Near focus distance, optimal focus 2475 * distance, and far focus distance will be filled in the array. 2476 * @see #FOCUS_DISTANCE_NEAR_INDEX 2477 * @see #FOCUS_DISTANCE_OPTIMAL_INDEX 2478 * @see #FOCUS_DISTANCE_FAR_INDEX 2479 */ 2480 public void getFocusDistances(float[] output) { 2481 if (output == null || output.length != 3) { 2482 throw new IllegalArgumentException( 2483 "output must be an float array with three elements."); 2484 } 2485 splitFloat(get(KEY_FOCUS_DISTANCES), output); 2486 } 2487 2488 // Splits a comma delimited string to an ArrayList of String. 2489 // Return null if the passing string is null or the size is 0. 2490 private ArrayList<String> split(String str) { 2491 if (str == null) return null; 2492 2493 // Use StringTokenizer because it is faster than split. 2494 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2495 ArrayList<String> substrings = new ArrayList<String>(); 2496 while (tokenizer.hasMoreElements()) { 2497 substrings.add(tokenizer.nextToken()); 2498 } 2499 return substrings; 2500 } 2501 2502 // Splits a comma delimited string to an ArrayList of Integer. 2503 // Return null if the passing string is null or the size is 0. 2504 private ArrayList<Integer> splitInt(String str) { 2505 if (str == null) return null; 2506 2507 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2508 ArrayList<Integer> substrings = new ArrayList<Integer>(); 2509 while (tokenizer.hasMoreElements()) { 2510 String token = tokenizer.nextToken(); 2511 substrings.add(Integer.parseInt(token)); 2512 } 2513 if (substrings.size() == 0) return null; 2514 return substrings; 2515 } 2516 2517 private void splitInt(String str, int[] output) { 2518 if (str == null) return; 2519 2520 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2521 int index = 0; 2522 while (tokenizer.hasMoreElements()) { 2523 String token = tokenizer.nextToken(); 2524 output[index++] = Integer.parseInt(token); 2525 } 2526 } 2527 2528 // Splits a comma delimited string to an ArrayList of Float. 2529 private void splitFloat(String str, float[] output) { 2530 if (str == null) return; 2531 2532 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2533 int index = 0; 2534 while (tokenizer.hasMoreElements()) { 2535 String token = tokenizer.nextToken(); 2536 output[index++] = Float.parseFloat(token); 2537 } 2538 } 2539 2540 // Returns the value of a float parameter. 2541 private float getFloat(String key, float defaultValue) { 2542 try { 2543 return Float.parseFloat(mMap.get(key)); 2544 } catch (NumberFormatException ex) { 2545 return defaultValue; 2546 } 2547 } 2548 2549 // Returns the value of a integer parameter. 2550 private int getInt(String key, int defaultValue) { 2551 try { 2552 return Integer.parseInt(mMap.get(key)); 2553 } catch (NumberFormatException ex) { 2554 return defaultValue; 2555 } 2556 } 2557 2558 // Splits a comma delimited string to an ArrayList of Size. 2559 // Return null if the passing string is null or the size is 0. 2560 private ArrayList<Size> splitSize(String str) { 2561 if (str == null) return null; 2562 2563 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2564 ArrayList<Size> sizeList = new ArrayList<Size>(); 2565 while (tokenizer.hasMoreElements()) { 2566 Size size = strToSize(tokenizer.nextToken()); 2567 if (size != null) sizeList.add(size); 2568 } 2569 if (sizeList.size() == 0) return null; 2570 return sizeList; 2571 } 2572 2573 // Parses a string (ex: "480x320") to Size object. 2574 // Return null if the passing string is null. 2575 private Size strToSize(String str) { 2576 if (str == null) return null; 2577 2578 int pos = str.indexOf('x'); 2579 if (pos != -1) { 2580 String width = str.substring(0, pos); 2581 String height = str.substring(pos + 1); 2582 return new Size(Integer.parseInt(width), 2583 Integer.parseInt(height)); 2584 } 2585 Log.e(TAG, "Invalid size parameter string=" + str); 2586 return null; 2587 } 2588 2589 // Splits a comma delimited string to an ArrayList of int array. 2590 // Example string: "(10000,26623),(10000,30000)". Return null if the 2591 // passing string is null or the size is 0. 2592 private ArrayList<int[]> splitRange(String str) { 2593 if (str == null || str.charAt(0) != '(' 2594 || str.charAt(str.length() - 1) != ')') { 2595 Log.e(TAG, "Invalid range list string=" + str); 2596 return null; 2597 } 2598 2599 ArrayList<int[]> rangeList = new ArrayList<int[]>(); 2600 int endIndex, fromIndex = 1; 2601 do { 2602 int[] range = new int[2]; 2603 endIndex = str.indexOf("),(", fromIndex); 2604 if (endIndex == -1) endIndex = str.length() - 1; 2605 splitInt(str.substring(fromIndex, endIndex), range); 2606 rangeList.add(range); 2607 fromIndex = endIndex + 3; 2608 } while (endIndex != str.length() - 1); 2609 2610 if (rangeList.size() == 0) return null; 2611 return rangeList; 2612 } 2613 }; 2614} 2615