Camera.java revision 0c74819b76752f78803530fb8e4ad0958f0949ed
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_YUV420P = "yuv420p"; 1366 private static final String PIXEL_FORMAT_RGB565 = "rgb565"; 1367 private static final String PIXEL_FORMAT_JPEG = "jpeg"; 1368 1369 private HashMap<String, String> mMap; 1370 1371 private Parameters() { 1372 mMap = new HashMap<String, String>(); 1373 } 1374 1375 /** 1376 * Writes the current Parameters to the log. 1377 * @hide 1378 * @deprecated 1379 */ 1380 public void dump() { 1381 Log.e(TAG, "dump: size=" + mMap.size()); 1382 for (String k : mMap.keySet()) { 1383 Log.e(TAG, "dump: " + k + "=" + mMap.get(k)); 1384 } 1385 } 1386 1387 /** 1388 * Creates a single string with all the parameters set in 1389 * this Parameters object. 1390 * <p>The {@link #unflatten(String)} method does the reverse.</p> 1391 * 1392 * @return a String with all values from this Parameters object, in 1393 * semi-colon delimited key-value pairs 1394 */ 1395 public String flatten() { 1396 StringBuilder flattened = new StringBuilder(); 1397 for (String k : mMap.keySet()) { 1398 flattened.append(k); 1399 flattened.append("="); 1400 flattened.append(mMap.get(k)); 1401 flattened.append(";"); 1402 } 1403 // chop off the extra semicolon at the end 1404 flattened.deleteCharAt(flattened.length()-1); 1405 return flattened.toString(); 1406 } 1407 1408 /** 1409 * Takes a flattened string of parameters and adds each one to 1410 * this Parameters object. 1411 * <p>The {@link #flatten()} method does the reverse.</p> 1412 * 1413 * @param flattened a String of parameters (key-value paired) that 1414 * are semi-colon delimited 1415 */ 1416 public void unflatten(String flattened) { 1417 mMap.clear(); 1418 1419 StringTokenizer tokenizer = new StringTokenizer(flattened, ";"); 1420 while (tokenizer.hasMoreElements()) { 1421 String kv = tokenizer.nextToken(); 1422 int pos = kv.indexOf('='); 1423 if (pos == -1) { 1424 continue; 1425 } 1426 String k = kv.substring(0, pos); 1427 String v = kv.substring(pos + 1); 1428 mMap.put(k, v); 1429 } 1430 } 1431 1432 public void remove(String key) { 1433 mMap.remove(key); 1434 } 1435 1436 /** 1437 * Sets a String parameter. 1438 * 1439 * @param key the key name for the parameter 1440 * @param value the String value of the parameter 1441 */ 1442 public void set(String key, String value) { 1443 if (key.indexOf('=') != -1 || key.indexOf(';') != -1) { 1444 Log.e(TAG, "Key \"" + key + "\" contains invalid character (= or ;)"); 1445 return; 1446 } 1447 if (value.indexOf('=') != -1 || value.indexOf(';') != -1) { 1448 Log.e(TAG, "Value \"" + value + "\" contains invalid character (= or ;)"); 1449 return; 1450 } 1451 1452 mMap.put(key, value); 1453 } 1454 1455 /** 1456 * Sets an integer parameter. 1457 * 1458 * @param key the key name for the parameter 1459 * @param value the int value of the parameter 1460 */ 1461 public void set(String key, int value) { 1462 mMap.put(key, Integer.toString(value)); 1463 } 1464 1465 /** 1466 * Returns the value of a String parameter. 1467 * 1468 * @param key the key name for the parameter 1469 * @return the String value of the parameter 1470 */ 1471 public String get(String key) { 1472 return mMap.get(key); 1473 } 1474 1475 /** 1476 * Returns the value of an integer parameter. 1477 * 1478 * @param key the key name for the parameter 1479 * @return the int value of the parameter 1480 */ 1481 public int getInt(String key) { 1482 return Integer.parseInt(mMap.get(key)); 1483 } 1484 1485 /** 1486 * Sets the dimensions for preview pictures. 1487 * 1488 * The sides of width and height are based on camera orientation. That 1489 * is, the preview size is the size before it is rotated by display 1490 * orientation. So applications need to consider the display orientation 1491 * while setting preview size. For example, suppose the camera supports 1492 * both 480x320 and 320x480 preview sizes. The application wants a 3:2 1493 * preview ratio. If the display orientation is set to 0 or 180, preview 1494 * size should be set to 480x320. If the display orientation is set to 1495 * 90 or 270, preview size should be set to 320x480. The display 1496 * orientation should also be considered while setting picture size and 1497 * thumbnail size. 1498 * 1499 * @param width the width of the pictures, in pixels 1500 * @param height the height of the pictures, in pixels 1501 * @see #setDisplayOrientation(int) 1502 * @see #getCameraInfo(int, CameraInfo) 1503 * @see #setPictureSize(int, int) 1504 * @see #setJpegThumbnailSize(int, int) 1505 */ 1506 public void setPreviewSize(int width, int height) { 1507 String v = Integer.toString(width) + "x" + Integer.toString(height); 1508 set(KEY_PREVIEW_SIZE, v); 1509 } 1510 1511 /** 1512 * Returns the dimensions setting for preview pictures. 1513 * 1514 * @return a Size object with the width and height setting 1515 * for the preview picture 1516 */ 1517 public Size getPreviewSize() { 1518 String pair = get(KEY_PREVIEW_SIZE); 1519 return strToSize(pair); 1520 } 1521 1522 /** 1523 * Gets the supported preview sizes. 1524 * 1525 * @return a list of Size object. This method will always return a list 1526 * with at least one element. 1527 */ 1528 public List<Size> getSupportedPreviewSizes() { 1529 String str = get(KEY_PREVIEW_SIZE + SUPPORTED_VALUES_SUFFIX); 1530 return splitSize(str); 1531 } 1532 1533 /** 1534 * Gets the supported video frame sizes that can be used by 1535 * MediaRecorder. 1536 * 1537 * If the returned list is not null, the returned list will contain at 1538 * least one Size and one of the sizes in the returned list must be 1539 * passed to MediaRecorder.setVideoSize() for camcorder application if 1540 * camera is used as the video source. In this case, the size of the 1541 * preview can be different from the resolution of the recorded video 1542 * during video recording. 1543 * 1544 * @return a list of Size object if camera has separate preview and 1545 * video output; otherwise, null is returned. 1546 * @see #getPreferredPreviewSizeForVideo() 1547 */ 1548 public List<Size> getSupportedVideoSizes() { 1549 String str = get(KEY_VIDEO_SIZE + SUPPORTED_VALUES_SUFFIX); 1550 return splitSize(str); 1551 } 1552 1553 /** 1554 * Returns the preferred or recommended preview size (width and height) 1555 * in pixels for video recording. Camcorder applications should 1556 * set the preview size to a value that is not larger than the 1557 * preferred preview size. In other words, the product of the width 1558 * and height of the preview size should not be larger than that of 1559 * the preferred preview size. In addition, we recommend to choose a 1560 * preview size that has the same aspect ratio as the resolution of 1561 * video to be recorded. 1562 * 1563 * @return the preferred preview size (width and height) in pixels for 1564 * video recording if getSupportedVideoSizes() does not return 1565 * null; otherwise, null is returned. 1566 * @see #getSupportedVideoSizes() 1567 */ 1568 public Size getPreferredPreviewSizeForVideo() { 1569 String pair = get(KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO); 1570 return strToSize(pair); 1571 } 1572 1573 /** 1574 * Sets the dimensions for EXIF thumbnail in Jpeg picture. If 1575 * applications set both width and height to 0, EXIF will not contain 1576 * thumbnail. 1577 * 1578 * Applications need to consider the display orientation. See {@link 1579 * #setPreviewSize(int,int)} for reference. 1580 * 1581 * @param width the width of the thumbnail, in pixels 1582 * @param height the height of the thumbnail, in pixels 1583 * @see #setPreviewSize(int,int) 1584 */ 1585 public void setJpegThumbnailSize(int width, int height) { 1586 set(KEY_JPEG_THUMBNAIL_WIDTH, width); 1587 set(KEY_JPEG_THUMBNAIL_HEIGHT, height); 1588 } 1589 1590 /** 1591 * Returns the dimensions for EXIF thumbnail in Jpeg picture. 1592 * 1593 * @return a Size object with the height and width setting for the EXIF 1594 * thumbnails 1595 */ 1596 public Size getJpegThumbnailSize() { 1597 return new Size(getInt(KEY_JPEG_THUMBNAIL_WIDTH), 1598 getInt(KEY_JPEG_THUMBNAIL_HEIGHT)); 1599 } 1600 1601 /** 1602 * Gets the supported jpeg thumbnail sizes. 1603 * 1604 * @return a list of Size object. This method will always return a list 1605 * with at least two elements. Size 0,0 (no thumbnail) is always 1606 * supported. 1607 */ 1608 public List<Size> getSupportedJpegThumbnailSizes() { 1609 String str = get(KEY_JPEG_THUMBNAIL_SIZE + SUPPORTED_VALUES_SUFFIX); 1610 return splitSize(str); 1611 } 1612 1613 /** 1614 * Sets the quality of the EXIF thumbnail in Jpeg picture. 1615 * 1616 * @param quality the JPEG quality of the EXIF thumbnail. The range is 1 1617 * to 100, with 100 being the best. 1618 */ 1619 public void setJpegThumbnailQuality(int quality) { 1620 set(KEY_JPEG_THUMBNAIL_QUALITY, quality); 1621 } 1622 1623 /** 1624 * Returns the quality setting for the EXIF thumbnail in Jpeg picture. 1625 * 1626 * @return the JPEG quality setting of the EXIF thumbnail. 1627 */ 1628 public int getJpegThumbnailQuality() { 1629 return getInt(KEY_JPEG_THUMBNAIL_QUALITY); 1630 } 1631 1632 /** 1633 * Sets Jpeg quality of captured picture. 1634 * 1635 * @param quality the JPEG quality of captured picture. The range is 1 1636 * to 100, with 100 being the best. 1637 */ 1638 public void setJpegQuality(int quality) { 1639 set(KEY_JPEG_QUALITY, quality); 1640 } 1641 1642 /** 1643 * Returns the quality setting for the JPEG picture. 1644 * 1645 * @return the JPEG picture quality setting. 1646 */ 1647 public int getJpegQuality() { 1648 return getInt(KEY_JPEG_QUALITY); 1649 } 1650 1651 /** 1652 * Sets the rate at which preview frames are received. This is the 1653 * target frame rate. The actual frame rate depends on the driver. 1654 * 1655 * @param fps the frame rate (frames per second) 1656 * @deprecated replaced by {@link #setPreviewFpsRange(int,int)} 1657 */ 1658 @Deprecated 1659 public void setPreviewFrameRate(int fps) { 1660 set(KEY_PREVIEW_FRAME_RATE, fps); 1661 } 1662 1663 /** 1664 * Returns the setting for the rate at which preview frames are 1665 * received. This is the target frame rate. The actual frame rate 1666 * depends on the driver. 1667 * 1668 * @return the frame rate setting (frames per second) 1669 * @deprecated replaced by {@link #getPreviewFpsRange(int[])} 1670 */ 1671 @Deprecated 1672 public int getPreviewFrameRate() { 1673 return getInt(KEY_PREVIEW_FRAME_RATE); 1674 } 1675 1676 /** 1677 * Gets the supported preview frame rates. 1678 * 1679 * @return a list of supported preview frame rates. null if preview 1680 * frame rate setting is not supported. 1681 * @deprecated replaced by {@link #getSupportedPreviewFpsRange()} 1682 */ 1683 @Deprecated 1684 public List<Integer> getSupportedPreviewFrameRates() { 1685 String str = get(KEY_PREVIEW_FRAME_RATE + SUPPORTED_VALUES_SUFFIX); 1686 return splitInt(str); 1687 } 1688 1689 /** 1690 * Sets the maximum and maximum preview fps. This controls the rate of 1691 * preview frames received in {@link PreviewCallback}. The minimum and 1692 * maximum preview fps must be one of the elements from {@link 1693 * #getSupportedPreviewFpsRange}. 1694 * 1695 * @param min the minimum preview fps (scaled by 1000). 1696 * @param max the maximum preview fps (scaled by 1000). 1697 * @throws RuntimeException if fps range is invalid. 1698 * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback) 1699 * @see #getSupportedPreviewFpsRange() 1700 */ 1701 public void setPreviewFpsRange(int min, int max) { 1702 set(KEY_PREVIEW_FPS_RANGE, "" + min + "," + max); 1703 } 1704 1705 /** 1706 * Returns the current minimum and maximum preview fps. The values are 1707 * one of the elements returned by {@link #getSupportedPreviewFpsRange}. 1708 * 1709 * @return range the minimum and maximum preview fps (scaled by 1000). 1710 * @see #PREVIEW_FPS_MIN_INDEX 1711 * @see #PREVIEW_FPS_MAX_INDEX 1712 * @see #getSupportedPreviewFpsRange() 1713 */ 1714 public void getPreviewFpsRange(int[] range) { 1715 if (range == null || range.length != 2) { 1716 throw new IllegalArgumentException( 1717 "range must be an array with two elements."); 1718 } 1719 splitInt(get(KEY_PREVIEW_FPS_RANGE), range); 1720 } 1721 1722 /** 1723 * Gets the supported preview fps (frame-per-second) ranges. Each range 1724 * contains a minimum fps and maximum fps. If minimum fps equals to 1725 * maximum fps, the camera outputs frames in fixed frame rate. If not, 1726 * the camera outputs frames in auto frame rate. The actual frame rate 1727 * fluctuates between the minimum and the maximum. The values are 1728 * multiplied by 1000 and represented in integers. For example, if frame 1729 * rate is 26.623 frames per second, the value is 26623. 1730 * 1731 * @return a list of supported preview fps ranges. This method returns a 1732 * list with at least one element. Every element is an int array 1733 * of two values - minimum fps and maximum fps. The list is 1734 * sorted from small to large (first by maximum fps and then 1735 * minimum fps). 1736 * @see #PREVIEW_FPS_MIN_INDEX 1737 * @see #PREVIEW_FPS_MAX_INDEX 1738 */ 1739 public List<int[]> getSupportedPreviewFpsRange() { 1740 String str = get(KEY_PREVIEW_FPS_RANGE + SUPPORTED_VALUES_SUFFIX); 1741 return splitRange(str); 1742 } 1743 1744 /** 1745 * Sets the image format for preview pictures. 1746 * <p>If this is never called, the default format will be 1747 * {@link android.graphics.ImageFormat#NV21}, which 1748 * uses the NV21 encoding format.</p> 1749 * 1750 * @param pixel_format the desired preview picture format, defined 1751 * by one of the {@link android.graphics.ImageFormat} constants. 1752 * (E.g., <var>ImageFormat.NV21</var> (default), 1753 * <var>ImageFormat.RGB_565</var>, or 1754 * <var>ImageFormat.JPEG</var>) 1755 * @see android.graphics.ImageFormat 1756 */ 1757 public void setPreviewFormat(int pixel_format) { 1758 String s = cameraFormatForPixelFormat(pixel_format); 1759 if (s == null) { 1760 throw new IllegalArgumentException( 1761 "Invalid pixel_format=" + pixel_format); 1762 } 1763 1764 set(KEY_PREVIEW_FORMAT, s); 1765 } 1766 1767 /** 1768 * Returns the image format for preview frames got from 1769 * {@link PreviewCallback}. 1770 * 1771 * @return the preview format. 1772 * @see android.graphics.ImageFormat 1773 */ 1774 public int getPreviewFormat() { 1775 return pixelFormatForCameraFormat(get(KEY_PREVIEW_FORMAT)); 1776 } 1777 1778 /** 1779 * Gets the supported preview formats. {@link android.graphics.ImageFormat#NV21} 1780 * is always supported. {@link android.graphics.ImageFormat#YV12} 1781 * is always supported since API level 12. 1782 * 1783 * @return a list of supported preview formats. This method will always 1784 * return a list with at least one element. 1785 * @see android.graphics.ImageFormat 1786 */ 1787 public List<Integer> getSupportedPreviewFormats() { 1788 String str = get(KEY_PREVIEW_FORMAT + SUPPORTED_VALUES_SUFFIX); 1789 ArrayList<Integer> formats = new ArrayList<Integer>(); 1790 for (String s : split(str)) { 1791 int f = pixelFormatForCameraFormat(s); 1792 if (f == ImageFormat.UNKNOWN) continue; 1793 formats.add(f); 1794 } 1795 return formats; 1796 } 1797 1798 /** 1799 * Sets the dimensions for pictures. 1800 * 1801 * Applications need to consider the display orientation. See {@link 1802 * #setPreviewSize(int,int)} for reference. 1803 * 1804 * @param width the width for pictures, in pixels 1805 * @param height the height for pictures, in pixels 1806 * @see #setPreviewSize(int,int) 1807 * 1808 */ 1809 public void setPictureSize(int width, int height) { 1810 String v = Integer.toString(width) + "x" + Integer.toString(height); 1811 set(KEY_PICTURE_SIZE, v); 1812 } 1813 1814 /** 1815 * Returns the dimension setting for pictures. 1816 * 1817 * @return a Size object with the height and width setting 1818 * for pictures 1819 */ 1820 public Size getPictureSize() { 1821 String pair = get(KEY_PICTURE_SIZE); 1822 return strToSize(pair); 1823 } 1824 1825 /** 1826 * Gets the supported picture sizes. 1827 * 1828 * @return a list of supported picture sizes. This method will always 1829 * return a list with at least one element. 1830 */ 1831 public List<Size> getSupportedPictureSizes() { 1832 String str = get(KEY_PICTURE_SIZE + SUPPORTED_VALUES_SUFFIX); 1833 return splitSize(str); 1834 } 1835 1836 /** 1837 * Sets the image format for pictures. 1838 * 1839 * @param pixel_format the desired picture format 1840 * (<var>ImageFormat.NV21</var>, 1841 * <var>ImageFormat.RGB_565</var>, or 1842 * <var>ImageFormat.JPEG</var>) 1843 * @see android.graphics.ImageFormat 1844 */ 1845 public void setPictureFormat(int pixel_format) { 1846 String s = cameraFormatForPixelFormat(pixel_format); 1847 if (s == null) { 1848 throw new IllegalArgumentException( 1849 "Invalid pixel_format=" + pixel_format); 1850 } 1851 1852 set(KEY_PICTURE_FORMAT, s); 1853 } 1854 1855 /** 1856 * Returns the image format for pictures. 1857 * 1858 * @return the picture format 1859 * @see android.graphics.ImageFormat 1860 */ 1861 public int getPictureFormat() { 1862 return pixelFormatForCameraFormat(get(KEY_PICTURE_FORMAT)); 1863 } 1864 1865 /** 1866 * Gets the supported picture formats. 1867 * 1868 * @return supported picture formats. This method will always return a 1869 * list with at least one element. 1870 * @see android.graphics.ImageFormat 1871 */ 1872 public List<Integer> getSupportedPictureFormats() { 1873 String str = get(KEY_PICTURE_FORMAT + SUPPORTED_VALUES_SUFFIX); 1874 ArrayList<Integer> formats = new ArrayList<Integer>(); 1875 for (String s : split(str)) { 1876 int f = pixelFormatForCameraFormat(s); 1877 if (f == ImageFormat.UNKNOWN) continue; 1878 formats.add(f); 1879 } 1880 return formats; 1881 } 1882 1883 private String cameraFormatForPixelFormat(int pixel_format) { 1884 switch(pixel_format) { 1885 case ImageFormat.NV16: return PIXEL_FORMAT_YUV422SP; 1886 case ImageFormat.NV21: return PIXEL_FORMAT_YUV420SP; 1887 case ImageFormat.YUY2: return PIXEL_FORMAT_YUV422I; 1888 case ImageFormat.YV12: return PIXEL_FORMAT_YUV420P; 1889 case ImageFormat.RGB_565: return PIXEL_FORMAT_RGB565; 1890 case ImageFormat.JPEG: return PIXEL_FORMAT_JPEG; 1891 default: return null; 1892 } 1893 } 1894 1895 private int pixelFormatForCameraFormat(String format) { 1896 if (format == null) 1897 return ImageFormat.UNKNOWN; 1898 1899 if (format.equals(PIXEL_FORMAT_YUV422SP)) 1900 return ImageFormat.NV16; 1901 1902 if (format.equals(PIXEL_FORMAT_YUV420SP)) 1903 return ImageFormat.NV21; 1904 1905 if (format.equals(PIXEL_FORMAT_YUV422I)) 1906 return ImageFormat.YUY2; 1907 1908 if (format.equals(PIXEL_FORMAT_YUV420P)) 1909 return ImageFormat.YV12; 1910 1911 if (format.equals(PIXEL_FORMAT_RGB565)) 1912 return ImageFormat.RGB_565; 1913 1914 if (format.equals(PIXEL_FORMAT_JPEG)) 1915 return ImageFormat.JPEG; 1916 1917 return ImageFormat.UNKNOWN; 1918 } 1919 1920 /** 1921 * Sets the rotation angle in degrees relative to the orientation of 1922 * the camera. This affects the pictures returned from JPEG {@link 1923 * PictureCallback}. The camera driver may set orientation in the 1924 * EXIF header without rotating the picture. Or the driver may rotate 1925 * the picture and the EXIF thumbnail. If the Jpeg picture is rotated, 1926 * the orientation in the EXIF header will be missing or 1 (row #0 is 1927 * top and column #0 is left side). 1928 * 1929 * <p>If applications want to rotate the picture to match the orientation 1930 * of what users see, apps should use {@link 1931 * android.view.OrientationEventListener} and {@link CameraInfo}. 1932 * The value from OrientationEventListener is relative to the natural 1933 * orientation of the device. CameraInfo.orientation is the angle 1934 * between camera orientation and natural device orientation. The sum 1935 * of the two is the rotation angle for back-facing camera. The 1936 * difference of the two is the rotation angle for front-facing camera. 1937 * Note that the JPEG pictures of front-facing cameras are not mirrored 1938 * as in preview display. 1939 * 1940 * <p>For example, suppose the natural orientation of the device is 1941 * portrait. The device is rotated 270 degrees clockwise, so the device 1942 * orientation is 270. Suppose a back-facing camera sensor is mounted in 1943 * landscape and the top side of the camera sensor is aligned with the 1944 * right edge of the display in natural orientation. So the camera 1945 * orientation is 90. The rotation should be set to 0 (270 + 90). 1946 * 1947 * <p>The reference code is as follows. 1948 * 1949 * <pre> 1950 * public void public void onOrientationChanged(int orientation) { 1951 * if (orientation == ORIENTATION_UNKNOWN) return; 1952 * android.hardware.Camera.CameraInfo info = 1953 * new android.hardware.Camera.CameraInfo(); 1954 * android.hardware.Camera.getCameraInfo(cameraId, info); 1955 * orientation = (orientation + 45) / 90 * 90; 1956 * int rotation = 0; 1957 * if (info.facing == CameraInfo.CAMERA_FACING_FRONT) { 1958 * rotation = (info.orientation - orientation + 360) % 360; 1959 * } else { // back-facing camera 1960 * rotation = (info.orientation + orientation) % 360; 1961 * } 1962 * mParameters.setRotation(rotation); 1963 * } 1964 * </pre> 1965 * 1966 * @param rotation The rotation angle in degrees relative to the 1967 * orientation of the camera. Rotation can only be 0, 1968 * 90, 180 or 270. 1969 * @throws IllegalArgumentException if rotation value is invalid. 1970 * @see android.view.OrientationEventListener 1971 * @see #getCameraInfo(int, CameraInfo) 1972 */ 1973 public void setRotation(int rotation) { 1974 if (rotation == 0 || rotation == 90 || rotation == 180 1975 || rotation == 270) { 1976 set(KEY_ROTATION, Integer.toString(rotation)); 1977 } else { 1978 throw new IllegalArgumentException( 1979 "Invalid rotation=" + rotation); 1980 } 1981 } 1982 1983 /** 1984 * Sets GPS latitude coordinate. This will be stored in JPEG EXIF 1985 * header. 1986 * 1987 * @param latitude GPS latitude coordinate. 1988 */ 1989 public void setGpsLatitude(double latitude) { 1990 set(KEY_GPS_LATITUDE, Double.toString(latitude)); 1991 } 1992 1993 /** 1994 * Sets GPS longitude coordinate. This will be stored in JPEG EXIF 1995 * header. 1996 * 1997 * @param longitude GPS longitude coordinate. 1998 */ 1999 public void setGpsLongitude(double longitude) { 2000 set(KEY_GPS_LONGITUDE, Double.toString(longitude)); 2001 } 2002 2003 /** 2004 * Sets GPS altitude. This will be stored in JPEG EXIF header. 2005 * 2006 * @param altitude GPS altitude in meters. 2007 */ 2008 public void setGpsAltitude(double altitude) { 2009 set(KEY_GPS_ALTITUDE, Double.toString(altitude)); 2010 } 2011 2012 /** 2013 * Sets GPS timestamp. This will be stored in JPEG EXIF header. 2014 * 2015 * @param timestamp GPS timestamp (UTC in seconds since January 1, 2016 * 1970). 2017 */ 2018 public void setGpsTimestamp(long timestamp) { 2019 set(KEY_GPS_TIMESTAMP, Long.toString(timestamp)); 2020 } 2021 2022 /** 2023 * Sets GPS processing method. It will store up to 32 characters 2024 * in JPEG EXIF header. 2025 * 2026 * @param processing_method The processing method to get this location. 2027 */ 2028 public void setGpsProcessingMethod(String processing_method) { 2029 set(KEY_GPS_PROCESSING_METHOD, processing_method); 2030 } 2031 2032 /** 2033 * Removes GPS latitude, longitude, altitude, and timestamp from the 2034 * parameters. 2035 */ 2036 public void removeGpsData() { 2037 remove(KEY_GPS_LATITUDE); 2038 remove(KEY_GPS_LONGITUDE); 2039 remove(KEY_GPS_ALTITUDE); 2040 remove(KEY_GPS_TIMESTAMP); 2041 remove(KEY_GPS_PROCESSING_METHOD); 2042 } 2043 2044 /** 2045 * Gets the current white balance setting. 2046 * 2047 * @return current white balance. null if white balance setting is not 2048 * supported. 2049 * @see #WHITE_BALANCE_AUTO 2050 * @see #WHITE_BALANCE_INCANDESCENT 2051 * @see #WHITE_BALANCE_FLUORESCENT 2052 * @see #WHITE_BALANCE_WARM_FLUORESCENT 2053 * @see #WHITE_BALANCE_DAYLIGHT 2054 * @see #WHITE_BALANCE_CLOUDY_DAYLIGHT 2055 * @see #WHITE_BALANCE_TWILIGHT 2056 * @see #WHITE_BALANCE_SHADE 2057 * 2058 */ 2059 public String getWhiteBalance() { 2060 return get(KEY_WHITE_BALANCE); 2061 } 2062 2063 /** 2064 * Sets the white balance. 2065 * 2066 * @param value new white balance. 2067 * @see #getWhiteBalance() 2068 */ 2069 public void setWhiteBalance(String value) { 2070 set(KEY_WHITE_BALANCE, value); 2071 } 2072 2073 /** 2074 * Gets the supported white balance. 2075 * 2076 * @return a list of supported white balance. null if white balance 2077 * setting is not supported. 2078 * @see #getWhiteBalance() 2079 */ 2080 public List<String> getSupportedWhiteBalance() { 2081 String str = get(KEY_WHITE_BALANCE + SUPPORTED_VALUES_SUFFIX); 2082 return split(str); 2083 } 2084 2085 /** 2086 * Gets the current color effect setting. 2087 * 2088 * @return current color effect. null if color effect 2089 * setting is not supported. 2090 * @see #EFFECT_NONE 2091 * @see #EFFECT_MONO 2092 * @see #EFFECT_NEGATIVE 2093 * @see #EFFECT_SOLARIZE 2094 * @see #EFFECT_SEPIA 2095 * @see #EFFECT_POSTERIZE 2096 * @see #EFFECT_WHITEBOARD 2097 * @see #EFFECT_BLACKBOARD 2098 * @see #EFFECT_AQUA 2099 */ 2100 public String getColorEffect() { 2101 return get(KEY_EFFECT); 2102 } 2103 2104 /** 2105 * Sets the current color effect setting. 2106 * 2107 * @param value new color effect. 2108 * @see #getColorEffect() 2109 */ 2110 public void setColorEffect(String value) { 2111 set(KEY_EFFECT, value); 2112 } 2113 2114 /** 2115 * Gets the supported color effects. 2116 * 2117 * @return a list of supported color effects. null if color effect 2118 * setting is not supported. 2119 * @see #getColorEffect() 2120 */ 2121 public List<String> getSupportedColorEffects() { 2122 String str = get(KEY_EFFECT + SUPPORTED_VALUES_SUFFIX); 2123 return split(str); 2124 } 2125 2126 2127 /** 2128 * Gets the current antibanding setting. 2129 * 2130 * @return current antibanding. null if antibanding setting is not 2131 * supported. 2132 * @see #ANTIBANDING_AUTO 2133 * @see #ANTIBANDING_50HZ 2134 * @see #ANTIBANDING_60HZ 2135 * @see #ANTIBANDING_OFF 2136 */ 2137 public String getAntibanding() { 2138 return get(KEY_ANTIBANDING); 2139 } 2140 2141 /** 2142 * Sets the antibanding. 2143 * 2144 * @param antibanding new antibanding value. 2145 * @see #getAntibanding() 2146 */ 2147 public void setAntibanding(String antibanding) { 2148 set(KEY_ANTIBANDING, antibanding); 2149 } 2150 2151 /** 2152 * Gets the supported antibanding values. 2153 * 2154 * @return a list of supported antibanding values. null if antibanding 2155 * setting is not supported. 2156 * @see #getAntibanding() 2157 */ 2158 public List<String> getSupportedAntibanding() { 2159 String str = get(KEY_ANTIBANDING + SUPPORTED_VALUES_SUFFIX); 2160 return split(str); 2161 } 2162 2163 /** 2164 * Gets the current scene mode setting. 2165 * 2166 * @return one of SCENE_MODE_XXX string constant. null if scene mode 2167 * setting is not supported. 2168 * @see #SCENE_MODE_AUTO 2169 * @see #SCENE_MODE_ACTION 2170 * @see #SCENE_MODE_PORTRAIT 2171 * @see #SCENE_MODE_LANDSCAPE 2172 * @see #SCENE_MODE_NIGHT 2173 * @see #SCENE_MODE_NIGHT_PORTRAIT 2174 * @see #SCENE_MODE_THEATRE 2175 * @see #SCENE_MODE_BEACH 2176 * @see #SCENE_MODE_SNOW 2177 * @see #SCENE_MODE_SUNSET 2178 * @see #SCENE_MODE_STEADYPHOTO 2179 * @see #SCENE_MODE_FIREWORKS 2180 * @see #SCENE_MODE_SPORTS 2181 * @see #SCENE_MODE_PARTY 2182 * @see #SCENE_MODE_CANDLELIGHT 2183 */ 2184 public String getSceneMode() { 2185 return get(KEY_SCENE_MODE); 2186 } 2187 2188 /** 2189 * Sets the scene mode. Changing scene mode may override other 2190 * parameters (such as flash mode, focus mode, white balance). For 2191 * example, suppose originally flash mode is on and supported flash 2192 * modes are on/off. In night scene mode, both flash mode and supported 2193 * flash mode may be changed to off. After setting scene mode, 2194 * applications should call getParameters to know if some parameters are 2195 * changed. 2196 * 2197 * @param value scene mode. 2198 * @see #getSceneMode() 2199 */ 2200 public void setSceneMode(String value) { 2201 set(KEY_SCENE_MODE, value); 2202 } 2203 2204 /** 2205 * Gets the supported scene modes. 2206 * 2207 * @return a list of supported scene modes. null if scene mode setting 2208 * is not supported. 2209 * @see #getSceneMode() 2210 */ 2211 public List<String> getSupportedSceneModes() { 2212 String str = get(KEY_SCENE_MODE + SUPPORTED_VALUES_SUFFIX); 2213 return split(str); 2214 } 2215 2216 /** 2217 * Gets the current flash mode setting. 2218 * 2219 * @return current flash mode. null if flash mode setting is not 2220 * supported. 2221 * @see #FLASH_MODE_OFF 2222 * @see #FLASH_MODE_AUTO 2223 * @see #FLASH_MODE_ON 2224 * @see #FLASH_MODE_RED_EYE 2225 * @see #FLASH_MODE_TORCH 2226 */ 2227 public String getFlashMode() { 2228 return get(KEY_FLASH_MODE); 2229 } 2230 2231 /** 2232 * Sets the flash mode. 2233 * 2234 * @param value flash mode. 2235 * @see #getFlashMode() 2236 */ 2237 public void setFlashMode(String value) { 2238 set(KEY_FLASH_MODE, value); 2239 } 2240 2241 /** 2242 * Gets the supported flash modes. 2243 * 2244 * @return a list of supported flash modes. null if flash mode setting 2245 * is not supported. 2246 * @see #getFlashMode() 2247 */ 2248 public List<String> getSupportedFlashModes() { 2249 String str = get(KEY_FLASH_MODE + SUPPORTED_VALUES_SUFFIX); 2250 return split(str); 2251 } 2252 2253 /** 2254 * Gets the current focus mode setting. 2255 * 2256 * @return current focus mode. This method will always return a non-null 2257 * value. Applications should call {@link 2258 * #autoFocus(AutoFocusCallback)} to start the focus if focus 2259 * mode is FOCUS_MODE_AUTO or FOCUS_MODE_MACRO. 2260 * @see #FOCUS_MODE_AUTO 2261 * @see #FOCUS_MODE_INFINITY 2262 * @see #FOCUS_MODE_MACRO 2263 * @see #FOCUS_MODE_FIXED 2264 * @see #FOCUS_MODE_EDOF 2265 * @see #FOCUS_MODE_CONTINUOUS_VIDEO 2266 */ 2267 public String getFocusMode() { 2268 return get(KEY_FOCUS_MODE); 2269 } 2270 2271 /** 2272 * Sets the focus mode. 2273 * 2274 * @param value focus mode. 2275 * @see #getFocusMode() 2276 */ 2277 public void setFocusMode(String value) { 2278 set(KEY_FOCUS_MODE, value); 2279 } 2280 2281 /** 2282 * Gets the supported focus modes. 2283 * 2284 * @return a list of supported focus modes. This method will always 2285 * return a list with at least one element. 2286 * @see #getFocusMode() 2287 */ 2288 public List<String> getSupportedFocusModes() { 2289 String str = get(KEY_FOCUS_MODE + SUPPORTED_VALUES_SUFFIX); 2290 return split(str); 2291 } 2292 2293 /** 2294 * Gets the focal length (in millimeter) of the camera. 2295 * 2296 * @return the focal length. This method will always return a valid 2297 * value. 2298 */ 2299 public float getFocalLength() { 2300 return Float.parseFloat(get(KEY_FOCAL_LENGTH)); 2301 } 2302 2303 /** 2304 * Gets the horizontal angle of view in degrees. 2305 * 2306 * @return horizontal angle of view. This method will always return a 2307 * valid value. 2308 */ 2309 public float getHorizontalViewAngle() { 2310 return Float.parseFloat(get(KEY_HORIZONTAL_VIEW_ANGLE)); 2311 } 2312 2313 /** 2314 * Gets the vertical angle of view in degrees. 2315 * 2316 * @return vertical angle of view. This method will always return a 2317 * valid value. 2318 */ 2319 public float getVerticalViewAngle() { 2320 return Float.parseFloat(get(KEY_VERTICAL_VIEW_ANGLE)); 2321 } 2322 2323 /** 2324 * Gets the current exposure compensation index. 2325 * 2326 * @return current exposure compensation index. The range is {@link 2327 * #getMinExposureCompensation} to {@link 2328 * #getMaxExposureCompensation}. 0 means exposure is not 2329 * adjusted. 2330 */ 2331 public int getExposureCompensation() { 2332 return getInt(KEY_EXPOSURE_COMPENSATION, 0); 2333 } 2334 2335 /** 2336 * Sets the exposure compensation index. 2337 * 2338 * @param value exposure compensation index. The valid value range is 2339 * from {@link #getMinExposureCompensation} (inclusive) to {@link 2340 * #getMaxExposureCompensation} (inclusive). 0 means exposure is 2341 * not adjusted. Application should call 2342 * getMinExposureCompensation and getMaxExposureCompensation to 2343 * know if exposure compensation is supported. 2344 */ 2345 public void setExposureCompensation(int value) { 2346 set(KEY_EXPOSURE_COMPENSATION, value); 2347 } 2348 2349 /** 2350 * Gets the maximum exposure compensation index. 2351 * 2352 * @return maximum exposure compensation index (>=0). If both this 2353 * method and {@link #getMinExposureCompensation} return 0, 2354 * exposure compensation is not supported. 2355 */ 2356 public int getMaxExposureCompensation() { 2357 return getInt(KEY_MAX_EXPOSURE_COMPENSATION, 0); 2358 } 2359 2360 /** 2361 * Gets the minimum exposure compensation index. 2362 * 2363 * @return minimum exposure compensation index (<=0). If both this 2364 * method and {@link #getMaxExposureCompensation} return 0, 2365 * exposure compensation is not supported. 2366 */ 2367 public int getMinExposureCompensation() { 2368 return getInt(KEY_MIN_EXPOSURE_COMPENSATION, 0); 2369 } 2370 2371 /** 2372 * Gets the exposure compensation step. 2373 * 2374 * @return exposure compensation step. Applications can get EV by 2375 * multiplying the exposure compensation index and step. Ex: if 2376 * exposure compensation index is -6 and step is 0.333333333, EV 2377 * is -2. 2378 */ 2379 public float getExposureCompensationStep() { 2380 return getFloat(KEY_EXPOSURE_COMPENSATION_STEP, 0); 2381 } 2382 2383 /** 2384 * Gets current zoom value. This also works when smooth zoom is in 2385 * progress. Applications should check {@link #isZoomSupported} before 2386 * using this method. 2387 * 2388 * @return the current zoom value. The range is 0 to {@link 2389 * #getMaxZoom}. 0 means the camera is not zoomed. 2390 */ 2391 public int getZoom() { 2392 return getInt(KEY_ZOOM, 0); 2393 } 2394 2395 /** 2396 * Sets current zoom value. If the camera is zoomed (value > 0), the 2397 * actual picture size may be smaller than picture size setting. 2398 * Applications can check the actual picture size after picture is 2399 * returned from {@link PictureCallback}. The preview size remains the 2400 * same in zoom. Applications should check {@link #isZoomSupported} 2401 * before using this method. 2402 * 2403 * @param value zoom value. The valid range is 0 to {@link #getMaxZoom}. 2404 */ 2405 public void setZoom(int value) { 2406 set(KEY_ZOOM, value); 2407 } 2408 2409 /** 2410 * Returns true if zoom is supported. Applications should call this 2411 * before using other zoom methods. 2412 * 2413 * @return true if zoom is supported. 2414 */ 2415 public boolean isZoomSupported() { 2416 String str = get(KEY_ZOOM_SUPPORTED); 2417 return TRUE.equals(str); 2418 } 2419 2420 /** 2421 * Gets the maximum zoom value allowed for snapshot. This is the maximum 2422 * value that applications can set to {@link #setZoom(int)}. 2423 * Applications should call {@link #isZoomSupported} before using this 2424 * method. This value may change in different preview size. Applications 2425 * should call this again after setting preview size. 2426 * 2427 * @return the maximum zoom value supported by the camera. 2428 */ 2429 public int getMaxZoom() { 2430 return getInt(KEY_MAX_ZOOM, 0); 2431 } 2432 2433 /** 2434 * Gets the zoom ratios of all zoom values. Applications should check 2435 * {@link #isZoomSupported} before using this method. 2436 * 2437 * @return the zoom ratios in 1/100 increments. Ex: a zoom of 3.2x is 2438 * returned as 320. The number of elements is {@link 2439 * #getMaxZoom} + 1. The list is sorted from small to large. The 2440 * first element is always 100. The last element is the zoom 2441 * ratio of the maximum zoom value. 2442 */ 2443 public List<Integer> getZoomRatios() { 2444 return splitInt(get(KEY_ZOOM_RATIOS)); 2445 } 2446 2447 /** 2448 * Returns true if smooth zoom is supported. Applications should call 2449 * this before using other smooth zoom methods. 2450 * 2451 * @return true if smooth zoom is supported. 2452 */ 2453 public boolean isSmoothZoomSupported() { 2454 String str = get(KEY_SMOOTH_ZOOM_SUPPORTED); 2455 return TRUE.equals(str); 2456 } 2457 2458 /** 2459 * Gets the distances from the camera to where an object appears to be 2460 * in focus. The object is sharpest at the optimal focus distance. The 2461 * depth of field is the far focus distance minus near focus distance. 2462 * 2463 * Focus distances may change after calling {@link 2464 * #autoFocus(AutoFocusCallback)}, {@link #cancelAutoFocus}, or {@link 2465 * #startPreview()}. Applications can call {@link #getParameters()} 2466 * and this method anytime to get the latest focus distances. If the 2467 * focus mode is FOCUS_MODE_CONTINUOUS_VIDEO, focus distances may change 2468 * from time to time. 2469 * 2470 * This method is intended to estimate the distance between the camera 2471 * and the subject. After autofocus, the subject distance may be within 2472 * near and far focus distance. However, the precision depends on the 2473 * camera hardware, autofocus algorithm, the focus area, and the scene. 2474 * The error can be large and it should be only used as a reference. 2475 * 2476 * Far focus distance >= optimal focus distance >= near focus distance. 2477 * If the focus distance is infinity, the value will be 2478 * Float.POSITIVE_INFINITY. 2479 * 2480 * @param output focus distances in meters. output must be a float 2481 * array with three elements. Near focus distance, optimal focus 2482 * distance, and far focus distance will be filled in the array. 2483 * @see #FOCUS_DISTANCE_NEAR_INDEX 2484 * @see #FOCUS_DISTANCE_OPTIMAL_INDEX 2485 * @see #FOCUS_DISTANCE_FAR_INDEX 2486 */ 2487 public void getFocusDistances(float[] output) { 2488 if (output == null || output.length != 3) { 2489 throw new IllegalArgumentException( 2490 "output must be an float array with three elements."); 2491 } 2492 splitFloat(get(KEY_FOCUS_DISTANCES), output); 2493 } 2494 2495 // Splits a comma delimited string to an ArrayList of String. 2496 // Return null if the passing string is null or the size is 0. 2497 private ArrayList<String> split(String str) { 2498 if (str == null) return null; 2499 2500 // Use StringTokenizer because it is faster than split. 2501 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2502 ArrayList<String> substrings = new ArrayList<String>(); 2503 while (tokenizer.hasMoreElements()) { 2504 substrings.add(tokenizer.nextToken()); 2505 } 2506 return substrings; 2507 } 2508 2509 // Splits a comma delimited string to an ArrayList of Integer. 2510 // Return null if the passing string is null or the size is 0. 2511 private ArrayList<Integer> splitInt(String str) { 2512 if (str == null) return null; 2513 2514 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2515 ArrayList<Integer> substrings = new ArrayList<Integer>(); 2516 while (tokenizer.hasMoreElements()) { 2517 String token = tokenizer.nextToken(); 2518 substrings.add(Integer.parseInt(token)); 2519 } 2520 if (substrings.size() == 0) return null; 2521 return substrings; 2522 } 2523 2524 private void splitInt(String str, int[] output) { 2525 if (str == null) return; 2526 2527 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2528 int index = 0; 2529 while (tokenizer.hasMoreElements()) { 2530 String token = tokenizer.nextToken(); 2531 output[index++] = Integer.parseInt(token); 2532 } 2533 } 2534 2535 // Splits a comma delimited string to an ArrayList of Float. 2536 private void splitFloat(String str, float[] output) { 2537 if (str == null) return; 2538 2539 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2540 int index = 0; 2541 while (tokenizer.hasMoreElements()) { 2542 String token = tokenizer.nextToken(); 2543 output[index++] = Float.parseFloat(token); 2544 } 2545 } 2546 2547 // Returns the value of a float parameter. 2548 private float getFloat(String key, float defaultValue) { 2549 try { 2550 return Float.parseFloat(mMap.get(key)); 2551 } catch (NumberFormatException ex) { 2552 return defaultValue; 2553 } 2554 } 2555 2556 // Returns the value of a integer parameter. 2557 private int getInt(String key, int defaultValue) { 2558 try { 2559 return Integer.parseInt(mMap.get(key)); 2560 } catch (NumberFormatException ex) { 2561 return defaultValue; 2562 } 2563 } 2564 2565 // Splits a comma delimited string to an ArrayList of Size. 2566 // Return null if the passing string is null or the size is 0. 2567 private ArrayList<Size> splitSize(String str) { 2568 if (str == null) return null; 2569 2570 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2571 ArrayList<Size> sizeList = new ArrayList<Size>(); 2572 while (tokenizer.hasMoreElements()) { 2573 Size size = strToSize(tokenizer.nextToken()); 2574 if (size != null) sizeList.add(size); 2575 } 2576 if (sizeList.size() == 0) return null; 2577 return sizeList; 2578 } 2579 2580 // Parses a string (ex: "480x320") to Size object. 2581 // Return null if the passing string is null. 2582 private Size strToSize(String str) { 2583 if (str == null) return null; 2584 2585 int pos = str.indexOf('x'); 2586 if (pos != -1) { 2587 String width = str.substring(0, pos); 2588 String height = str.substring(pos + 1); 2589 return new Size(Integer.parseInt(width), 2590 Integer.parseInt(height)); 2591 } 2592 Log.e(TAG, "Invalid size parameter string=" + str); 2593 return null; 2594 } 2595 2596 // Splits a comma delimited string to an ArrayList of int array. 2597 // Example string: "(10000,26623),(10000,30000)". Return null if the 2598 // passing string is null or the size is 0. 2599 private ArrayList<int[]> splitRange(String str) { 2600 if (str == null || str.charAt(0) != '(' 2601 || str.charAt(str.length() - 1) != ')') { 2602 Log.e(TAG, "Invalid range list string=" + str); 2603 return null; 2604 } 2605 2606 ArrayList<int[]> rangeList = new ArrayList<int[]>(); 2607 int endIndex, fromIndex = 1; 2608 do { 2609 int[] range = new int[2]; 2610 endIndex = str.indexOf("),(", fromIndex); 2611 if (endIndex == -1) endIndex = str.length() - 1; 2612 splitInt(str.substring(fromIndex, endIndex), range); 2613 rangeList.add(range); 2614 fromIndex = endIndex + 3; 2615 } while (endIndex != str.length() - 1); 2616 2617 if (rangeList.size() == 0) return null; 2618 return rangeList; 2619 } 2620 }; 2621} 2622