Camera.java revision 724c52244423feced2677fbd1f905e0b8b0639f2
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.os.Handler; 31import android.os.Looper; 32import android.os.Message; 33 34/** 35 * The Camera class is used to connect/disconnect with the camera service, 36 * set capture settings, start/stop preview, snap a picture, and retrieve 37 * frames for encoding for video. 38 * <p>There is no default constructor for this class. Use {@link #open()} to 39 * get a Camera object.</p> 40 * 41 * <p>In order to use the device camera, you must declare the 42 * {@link android.Manifest.permission#CAMERA} permission in your Android 43 * Manifest. Also be sure to include the 44 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 45 * manifest element in order to declare camera features used by your application. 46 * For example, if you use the camera and auto-focus feature, your Manifest 47 * should include the following:</p> 48 * <pre> <uses-permission android:name="android.permission.CAMERA" /> 49 * <uses-feature android:name="android.hardware.camera" /> 50 * <uses-feature android:name="android.hardware.camera.autofocus" /></pre> 51 * 52 * <p class="caution"><strong>Caution:</strong> Different Android-powered devices 53 * may have different hardware specifications, such as megapixel ratings and 54 * auto-focus capabilities. In order for your application to be compatible with 55 * more devices, you should not make assumptions about the device camera 56 * specifications.</p> 57 */ 58public class Camera { 59 private static final String TAG = "Camera"; 60 61 // These match the enums in frameworks/base/include/camera/Camera.h 62 private static final int CAMERA_MSG_ERROR = 0x001; 63 private static final int CAMERA_MSG_SHUTTER = 0x002; 64 private static final int CAMERA_MSG_FOCUS = 0x004; 65 private static final int CAMERA_MSG_ZOOM = 0x008; 66 private static final int CAMERA_MSG_PREVIEW_FRAME = 0x010; 67 private static final int CAMERA_MSG_VIDEO_FRAME = 0x020; 68 private static final int CAMERA_MSG_POSTVIEW_FRAME = 0x040; 69 private static final int CAMERA_MSG_RAW_IMAGE = 0x080; 70 private static final int CAMERA_MSG_COMPRESSED_IMAGE = 0x100; 71 private static final int CAMERA_MSG_ALL_MSGS = 0x1FF; 72 73 private int mNativeContext; // accessed by native methods 74 private EventHandler mEventHandler; 75 private ShutterCallback mShutterCallback; 76 private PictureCallback mRawImageCallback; 77 private PictureCallback mJpegCallback; 78 private PreviewCallback mPreviewCallback; 79 private PictureCallback mPostviewCallback; 80 private AutoFocusCallback mAutoFocusCallback; 81 private OnZoomChangeListener mZoomListener; 82 private ErrorCallback mErrorCallback; 83 private boolean mOneShot; 84 private boolean mWithBuffer; 85 86 /** 87 * Returns the number of Cameras available. 88 * @hide 89 */ 90 public native static int getNumberOfCameras(); 91 92 /** 93 * Returns the information about the camera. 94 * If {@link #getNumberOfCameras()} returns N, the valid id is 0 to N-1. 95 * @hide 96 */ 97 public native static void getCameraInfo(int cameraId, CameraInfo cameraInfo); 98 99 /** 100 * Information about a camera 101 * @hide 102 */ 103 public static class CameraInfo { 104 public static final int CAMERA_FACING_BACK = 0; 105 public static final int CAMERA_FACING_FRONT = 1; 106 107 /** 108 * The direction that the camera faces to. It should be 109 * CAMERA_FACING_BACK or CAMERA_FACING_FRONT. 110 */ 111 public int mFacing; 112 113 /** 114 * The orientation of the camera image. The value is the angle that the 115 * camera image needs to be rotated clockwise so it shows correctly on 116 * the display in its natural orientation. It should be 0, 90, 180, or 270. 117 * 118 * For example, suppose a device has a naturally tall screen, but the camera 119 * sensor is mounted in landscape. If the top side of the camera sensor is 120 * aligned with the right edge of the display in natural orientation, the 121 * value should be 90. 122 * 123 * @see #setDisplayOrientation(int) 124 */ 125 public int mOrientation; 126 }; 127 128 /** 129 * Returns a new Camera object. 130 * If {@link #getNumberOfCameras()} returns N, the valid id is 0 to N-1. 131 * The id 0 is the default camera. 132 * @hide 133 */ 134 public static Camera open(int cameraId) { 135 return new Camera(cameraId); 136 } 137 138 /** 139 * The id for the default camera. 140 * @hide 141 */ 142 public static int CAMERA_ID_DEFAULT = 0; 143 144 /** 145 * Returns a new Camera object. This returns the default camera. 146 */ 147 public static Camera open() { 148 return new Camera(CAMERA_ID_DEFAULT); 149 } 150 151 Camera(int cameraId) { 152 mShutterCallback = null; 153 mRawImageCallback = null; 154 mJpegCallback = null; 155 mPreviewCallback = null; 156 mPostviewCallback = null; 157 mZoomListener = null; 158 159 Looper looper; 160 if ((looper = Looper.myLooper()) != null) { 161 mEventHandler = new EventHandler(this, looper); 162 } else if ((looper = Looper.getMainLooper()) != null) { 163 mEventHandler = new EventHandler(this, looper); 164 } else { 165 mEventHandler = null; 166 } 167 168 native_setup(new WeakReference<Camera>(this), cameraId); 169 } 170 171 protected void finalize() { 172 native_release(); 173 } 174 175 private native final void native_setup(Object camera_this, int cameraId); 176 private native final void native_release(); 177 178 179 /** 180 * Disconnects and releases the Camera object resources. 181 * <p>It is recommended that you call this as soon as you're done with the 182 * Camera object.</p> 183 */ 184 public final void release() { 185 native_release(); 186 } 187 188 /** 189 * Reconnect to the camera after passing it to MediaRecorder. To save 190 * setup/teardown time, a client of Camera can pass an initialized Camera 191 * object to a MediaRecorder to use for video recording. Once the 192 * MediaRecorder is done with the Camera, this method can be used to 193 * re-establish a connection with the camera hardware. NOTE: The Camera 194 * object must first be unlocked by the process that owns it before it 195 * can be connected to another process. 196 * 197 * @throws IOException if the method fails. 198 */ 199 public native final void reconnect() throws IOException; 200 201 /** 202 * Lock the camera to prevent other processes from accessing it. To save 203 * setup/teardown time, a client of Camera can pass an initialized Camera 204 * object to another process. This method is used to re-lock the Camera 205 * object prevent other processes from accessing it. By default, the 206 * Camera object is locked. Locking it again from the same process will 207 * have no effect. Attempting to lock it from another process if it has 208 * not been unlocked will fail. 209 * 210 * @throws RuntimeException if the method fails. 211 */ 212 public native final void lock(); 213 214 /** 215 * Unlock the camera to allow another process to access it. To save 216 * setup/teardown time, a client of Camera can pass an initialized Camera 217 * object to another process. This method is used to unlock the Camera 218 * object before handing off the Camera object to the other process. 219 * 220 * @throws RuntimeException if the method fails. 221 */ 222 public native final void unlock(); 223 224 /** 225 * Sets the SurfaceHolder to be used for a picture preview. If the surface 226 * changed since the last call, the screen will blank. Nothing happens 227 * if the same surface is re-set. 228 * 229 * @param holder the SurfaceHolder upon which to place the picture preview 230 * @throws IOException if the method fails. 231 */ 232 public final void setPreviewDisplay(SurfaceHolder holder) throws IOException { 233 if (holder != null) { 234 setPreviewDisplay(holder.getSurface()); 235 } else { 236 setPreviewDisplay((Surface)null); 237 } 238 } 239 240 private native final void setPreviewDisplay(Surface surface); 241 242 /** 243 * Used to get a copy of each preview frame. 244 */ 245 public interface PreviewCallback 246 { 247 /** 248 * The callback that delivers the preview frames. 249 * 250 * @param data The contents of the preview frame in the format defined 251 * by {@link android.graphics.ImageFormat}, which can be queried 252 * with {@link android.hardware.Camera.Parameters#getPreviewFormat()}. 253 * If {@link android.hardware.Camera.Parameters#setPreviewFormat(int)} 254 * is never called, the default will be the YCbCr_420_SP 255 * (NV21) format. 256 * @param camera The Camera service object. 257 */ 258 void onPreviewFrame(byte[] data, Camera camera); 259 }; 260 261 /** 262 * Start drawing preview frames to the surface. 263 */ 264 public native final void startPreview(); 265 266 /** 267 * Stop drawing preview frames to the surface. 268 */ 269 public native final void stopPreview(); 270 271 /** 272 * Return current preview state. 273 * 274 * FIXME: Unhide before release 275 * @hide 276 */ 277 public native final boolean previewEnabled(); 278 279 /** 280 * Can be called at any time to instruct the camera to use a callback for 281 * each preview frame in addition to displaying it. 282 * 283 * @param cb A callback object that receives a copy of each preview frame. 284 * Pass null to stop receiving callbacks at any time. 285 */ 286 public final void setPreviewCallback(PreviewCallback cb) { 287 mPreviewCallback = cb; 288 mOneShot = false; 289 mWithBuffer = false; 290 // Always use one-shot mode. We fake camera preview mode by 291 // doing one-shot preview continuously. 292 setHasPreviewCallback(cb != null, false); 293 } 294 295 /** 296 * Installs a callback to retrieve a single preview frame, after which the 297 * callback is cleared. 298 * 299 * @param cb A callback object that receives a copy of the preview frame. 300 */ 301 public final void setOneShotPreviewCallback(PreviewCallback cb) { 302 mPreviewCallback = cb; 303 mOneShot = true; 304 mWithBuffer = false; 305 setHasPreviewCallback(cb != null, false); 306 } 307 308 private native final void setHasPreviewCallback(boolean installed, boolean manualBuffer); 309 310 /** 311 * Installs a callback which will get called as long as there are buffers in the 312 * preview buffer queue, which minimizes dynamic allocation of preview buffers. 313 * 314 * Apps must call addCallbackBuffer to explicitly register the buffers to use, or no callbacks 315 * will be received. addCallbackBuffer may be safely called before or after 316 * a call to setPreviewCallbackWithBuffer with a non-null callback parameter. 317 * 318 * The buffer queue will be cleared upon any calls to setOneShotPreviewCallback, 319 * setPreviewCallback, or to this method with a null callback parameter. 320 * 321 * @param cb A callback object that receives a copy of the preview frame. A null value will clear the queue. 322 */ 323 public final void setPreviewCallbackWithBuffer(PreviewCallback cb) { 324 mPreviewCallback = cb; 325 mOneShot = false; 326 mWithBuffer = true; 327 setHasPreviewCallback(cb != null, true); 328 } 329 330 /** 331 * Adds a pre-allocated buffer to the preview callback buffer queue. 332 * Applications can add one or more buffers to the queue. When a preview 333 * frame arrives and there is still available buffer, buffer will be filled 334 * and it is removed from the queue. Then preview callback is invoked with 335 * the buffer. If a frame arrives and there is no buffer left, the frame is 336 * discarded. Applications should add the buffers back when they finish the 337 * processing. 338 * 339 * The image format of the callback buffer can be read from {@link 340 * android.hardware.Camera.Parameters#getPreviewFormat()}. bitsPerPixel can 341 * be read from {@link android.graphics.ImageFormat#getBitsPerPixel(int)}. 342 * Preview width and height can be determined from getPreviewSize. 343 * 344 * Alternatively, a buffer from a previous callback may be passed in or used 345 * to determine the size of new preview frame buffers. 346 * 347 * @param callbackBuffer The buffer to register. Size should be width * height * bitsPerPixel / 8. 348 * @see #setPreviewCallbackWithBuffer(PreviewCallback) 349 */ 350 public native final void addCallbackBuffer(byte[] callbackBuffer); 351 352 private class EventHandler extends Handler 353 { 354 private Camera mCamera; 355 356 public EventHandler(Camera c, Looper looper) { 357 super(looper); 358 mCamera = c; 359 } 360 361 @Override 362 public void handleMessage(Message msg) { 363 switch(msg.what) { 364 case CAMERA_MSG_SHUTTER: 365 if (mShutterCallback != null) { 366 mShutterCallback.onShutter(); 367 } 368 return; 369 370 case CAMERA_MSG_RAW_IMAGE: 371 if (mRawImageCallback != null) { 372 mRawImageCallback.onPictureTaken((byte[])msg.obj, mCamera); 373 } 374 return; 375 376 case CAMERA_MSG_COMPRESSED_IMAGE: 377 if (mJpegCallback != null) { 378 mJpegCallback.onPictureTaken((byte[])msg.obj, mCamera); 379 } 380 return; 381 382 case CAMERA_MSG_PREVIEW_FRAME: 383 if (mPreviewCallback != null) { 384 PreviewCallback cb = mPreviewCallback; 385 if (mOneShot) { 386 // Clear the callback variable before the callback 387 // in case the app calls setPreviewCallback from 388 // the callback function 389 mPreviewCallback = null; 390 } else if (!mWithBuffer) { 391 // We're faking the camera preview mode to prevent 392 // the app from being flooded with preview frames. 393 // Set to oneshot mode again. 394 setHasPreviewCallback(true, false); 395 } 396 cb.onPreviewFrame((byte[])msg.obj, mCamera); 397 } 398 return; 399 400 case CAMERA_MSG_POSTVIEW_FRAME: 401 if (mPostviewCallback != null) { 402 mPostviewCallback.onPictureTaken((byte[])msg.obj, mCamera); 403 } 404 return; 405 406 case CAMERA_MSG_FOCUS: 407 if (mAutoFocusCallback != null) { 408 mAutoFocusCallback.onAutoFocus(msg.arg1 == 0 ? false : true, mCamera); 409 } 410 return; 411 412 case CAMERA_MSG_ZOOM: 413 if (mZoomListener != null) { 414 mZoomListener.onZoomChange(msg.arg1, msg.arg2 != 0, mCamera); 415 } 416 return; 417 418 case CAMERA_MSG_ERROR : 419 Log.e(TAG, "Error " + msg.arg1); 420 if (mErrorCallback != null) { 421 mErrorCallback.onError(msg.arg1, mCamera); 422 } 423 return; 424 425 default: 426 Log.e(TAG, "Unknown message type " + msg.what); 427 return; 428 } 429 } 430 } 431 432 private static void postEventFromNative(Object camera_ref, 433 int what, int arg1, int arg2, Object obj) 434 { 435 Camera c = (Camera)((WeakReference)camera_ref).get(); 436 if (c == null) 437 return; 438 439 if (c.mEventHandler != null) { 440 Message m = c.mEventHandler.obtainMessage(what, arg1, arg2, obj); 441 c.mEventHandler.sendMessage(m); 442 } 443 } 444 445 /** 446 * Handles the callback for the camera auto focus. 447 * <p>Devices that do not support auto-focus will receive a "fake" 448 * callback to this interface. If your application needs auto-focus and 449 * should not be installed on devices <em>without</em> auto-focus, you must 450 * declare that your app uses the 451 * {@code android.hardware.camera.autofocus} feature, in the 452 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 453 * manifest element.</p> 454 */ 455 public interface AutoFocusCallback 456 { 457 /** 458 * Callback for the camera auto focus. If the camera does not support 459 * auto-focus and autoFocus is called, onAutoFocus will be called 460 * immediately with success. 461 * 462 * @param success true if focus was successful, false if otherwise 463 * @param camera the Camera service object 464 */ 465 void onAutoFocus(boolean success, Camera camera); 466 }; 467 468 /** 469 * Starts auto-focus function and registers a callback function to run when 470 * camera is focused. Only valid after startPreview() has been called. 471 * Applications should call {@link 472 * android.hardware.Camera.Parameters#getFocusMode()} to determine if this 473 * method should be called. If the camera does not support auto-focus, it is 474 * a no-op and {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} 475 * callback will be called immediately. 476 * <p>If your application should not be installed 477 * on devices without auto-focus, you must declare that your application 478 * uses auto-focus with the 479 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 480 * manifest element.</p> 481 * <p>If the current flash mode is not 482 * {@link android.hardware.Camera.Parameters#FLASH_MODE_OFF}, flash may be 483 * fired during auto-focus depending on the driver.<p> 484 * 485 * @param cb the callback to run 486 */ 487 public final void autoFocus(AutoFocusCallback cb) 488 { 489 mAutoFocusCallback = cb; 490 native_autoFocus(); 491 } 492 private native final void native_autoFocus(); 493 494 /** 495 * Cancels auto-focus function. If the auto-focus is still in progress, 496 * this function will cancel it. Whether the auto-focus is in progress 497 * or not, this function will return the focus position to the default. 498 * If the camera does not support auto-focus, this is a no-op. 499 */ 500 public final void cancelAutoFocus() 501 { 502 mAutoFocusCallback = null; 503 native_cancelAutoFocus(); 504 } 505 private native final void native_cancelAutoFocus(); 506 507 /** 508 * An interface which contains a callback for the shutter closing after taking a picture. 509 */ 510 public interface ShutterCallback 511 { 512 /** 513 * Can be used to play a shutter sound as soon as the image has been captured, but before 514 * the data is available. 515 */ 516 void onShutter(); 517 } 518 519 /** 520 * Handles the callback for when a picture is taken. 521 */ 522 public interface PictureCallback { 523 /** 524 * Callback for when a picture is taken. 525 * 526 * @param data a byte array of the picture data 527 * @param camera the Camera service object 528 */ 529 void onPictureTaken(byte[] data, Camera camera); 530 }; 531 532 /** 533 * Triggers an asynchronous image capture. The camera service will initiate 534 * a series of callbacks to the application as the image capture progresses. 535 * The shutter callback occurs after the image is captured. This can be used 536 * to trigger a sound to let the user know that image has been captured. The 537 * raw callback occurs when the raw image data is available (NOTE: the data 538 * may be null if the hardware does not have enough memory to make a copy). 539 * The jpeg callback occurs when the compressed image is available. If the 540 * application does not need a particular callback, a null can be passed 541 * instead of a callback method. 542 * 543 * This method will stop the preview. Applications should not call {@link 544 * #stopPreview()} before this. After jpeg callback is received, 545 * applications can call {@link #startPreview()} to restart the preview. 546 * 547 * @param shutter callback after the image is captured, may be null 548 * @param raw callback with raw image data, may be null 549 * @param jpeg callback with jpeg image data, may be null 550 */ 551 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 552 PictureCallback jpeg) { 553 takePicture(shutter, raw, null, jpeg); 554 } 555 private native final void native_takePicture(); 556 557 /** 558 * Triggers an asynchronous image capture. The camera service will initiate 559 * a series of callbacks to the application as the image capture progresses. 560 * The shutter callback occurs after the image is captured. This can be used 561 * to trigger a sound to let the user know that image has been captured. The 562 * raw callback occurs when the raw image data is available (NOTE: the data 563 * may be null if the hardware does not have enough memory to make a copy). 564 * The postview callback occurs when a scaled, fully processed postview 565 * image is available (NOTE: not all hardware supports this). The jpeg 566 * callback occurs when the compressed image is available. If the 567 * application does not need a particular callback, a null can be passed 568 * instead of a callback method. 569 * 570 * This method will stop the preview. Applications should not call {@link 571 * #stopPreview()} before this. After jpeg callback is received, 572 * applications can call {@link #startPreview()} to restart the preview. 573 * 574 * @param shutter callback after the image is captured, may be null 575 * @param raw callback with raw image data, may be null 576 * @param postview callback with postview image data, may be null 577 * @param jpeg callback with jpeg image data, may be null 578 */ 579 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 580 PictureCallback postview, PictureCallback jpeg) { 581 mShutterCallback = shutter; 582 mRawImageCallback = raw; 583 mPostviewCallback = postview; 584 mJpegCallback = jpeg; 585 native_takePicture(); 586 } 587 588 /** 589 * Zooms to the requested value smoothly. Driver will notify {@link 590 * OnZoomChangeListener} of the zoom value and whether zoom is stopped at 591 * the time. For example, suppose the current zoom is 0 and startSmoothZoom 592 * is called with value 3. Method onZoomChange will be called three times 593 * with zoom value 1, 2, and 3. The applications can call {@link 594 * #stopSmoothZoom} to stop the zoom earlier. The applications should not 595 * call startSmoothZoom again or change the zoom value before zoom stops. If 596 * the passing zoom value equals to the current zoom value, no zoom callback 597 * will be generated. This method is supported if {@link 598 * android.hardware.Camera.Parameters#isSmoothZoomSupported} is true. 599 * 600 * @param value zoom value. The valid range is 0 to {@link 601 * android.hardware.Camera.Parameters#getMaxZoom}. 602 * @throws IllegalArgumentException if the zoom value is invalid. 603 * @throws RuntimeException if the method fails. 604 */ 605 public native final void startSmoothZoom(int value); 606 607 /** 608 * Stops the smooth zoom. The applications should wait for the {@link 609 * OnZoomChangeListener} to know when the zoom is actually stopped. This 610 * method is supported if {@link 611 * android.hardware.Camera.Parameters#isSmoothZoomSupported} is true. 612 * 613 * @throws RuntimeException if the method fails. 614 */ 615 public native final void stopSmoothZoom(); 616 617 /** 618 * Set the display orientation. This affects the preview frames and the 619 * picture displayed after snapshot. This method is useful for portrait 620 * mode applications. 621 * 622 * This does not affect the order of byte array passed in 623 * {@link PreviewCallback#onPreviewFrame}. This method is not allowed to 624 * be called during preview. 625 * 626 * If you want to make the camera image show in the same orientation as 627 * the display, you can use the following code.<p> 628 * <pre> 629 * public static void setCameraDisplayOrientation(Activity activity, 630 * int cameraId, android.hardware.Camera camera) { 631 * android.hardware.Camera.CameraInfo info = 632 * new android.hardware.Camera.CameraInfo(); 633 * android.hardware.Camera.getCameraInfo(cameraId, info); 634 * int rotation = activity.getWindowManager().getDefaultDisplay() 635 * .getRotation(); 636 * int degrees = 0; 637 * switch (rotation) { 638 * case Surface.ROTATION_0: degrees = 0; break; 639 * case Surface.ROTATION_90: degrees = 90; break; 640 * case Surface.ROTATION_180: degrees = 180; break; 641 * case Surface.ROTATION_270: degrees = 270; break; 642 * } 643 * 644 * int result = (info.mOrientation - degrees + 360) % 360; 645 * camera.setDisplayOrientation(result); 646 * } 647 * </pre> 648 * @param degrees the angle that the picture will be rotated clockwise. 649 * Valid values are 0, 90, 180, and 270. The starting 650 * position is 0 (landscape). 651 */ 652 public native final void setDisplayOrientation(int degrees); 653 654 /** 655 * Interface for a callback to be invoked when zoom value changes. 656 */ 657 public interface OnZoomChangeListener 658 { 659 /** 660 * Called when the zoom value has changed. 661 * 662 * @param zoomValue the current zoom value. In smooth zoom mode, camera 663 * calls this for every new zoom value. 664 * @param stopped whether smooth zoom is stopped. If the value is true, 665 * this is the last zoom update for the application. 666 * 667 * @param camera the Camera service object 668 * @see #startSmoothZoom(int) 669 */ 670 void onZoomChange(int zoomValue, boolean stopped, Camera camera); 671 }; 672 673 /** 674 * Registers a listener to be notified when the zoom value is updated by the 675 * camera driver during smooth zoom. 676 * 677 * @param listener the listener to notify 678 * @see #startSmoothZoom(int) 679 */ 680 public final void setZoomChangeListener(OnZoomChangeListener listener) 681 { 682 mZoomListener = listener; 683 } 684 685 // These match the enum in include/ui/Camera.h 686 /** Unspecified camerar error. @see #ErrorCallback */ 687 public static final int CAMERA_ERROR_UNKNOWN = 1; 688 /** Media server died. In this case, the application must release the 689 * Camera object and instantiate a new one. @see #ErrorCallback */ 690 public static final int CAMERA_ERROR_SERVER_DIED = 100; 691 692 /** 693 * Handles the camera error callback. 694 */ 695 public interface ErrorCallback 696 { 697 /** 698 * Callback for camera errors. 699 * @param error error code: 700 * <ul> 701 * <li>{@link #CAMERA_ERROR_UNKNOWN} 702 * <li>{@link #CAMERA_ERROR_SERVER_DIED} 703 * </ul> 704 * @param camera the Camera service object 705 */ 706 void onError(int error, Camera camera); 707 }; 708 709 /** 710 * Registers a callback to be invoked when an error occurs. 711 * @param cb the callback to run 712 */ 713 public final void setErrorCallback(ErrorCallback cb) 714 { 715 mErrorCallback = cb; 716 } 717 718 private native final void native_setParameters(String params); 719 private native final String native_getParameters(); 720 721 /** 722 * Sets the Parameters for pictures from this Camera service. 723 * 724 * @param params the Parameters to use for this Camera service 725 */ 726 public void setParameters(Parameters params) { 727 native_setParameters(params.flatten()); 728 } 729 730 /** 731 * Returns the picture Parameters for this Camera service. 732 */ 733 public Parameters getParameters() { 734 Parameters p = new Parameters(); 735 String s = native_getParameters(); 736 p.unflatten(s); 737 return p; 738 } 739 740 /** 741 * Handles the picture size (dimensions). 742 */ 743 public class Size { 744 /** 745 * Sets the dimensions for pictures. 746 * 747 * @param w the photo width (pixels) 748 * @param h the photo height (pixels) 749 */ 750 public Size(int w, int h) { 751 width = w; 752 height = h; 753 } 754 /** 755 * Compares {@code obj} to this size. 756 * 757 * @param obj the object to compare this size with. 758 * @return {@code true} if the width and height of {@code obj} is the 759 * same as those of this size. {@code false} otherwise. 760 */ 761 @Override 762 public boolean equals(Object obj) { 763 if (!(obj instanceof Size)) { 764 return false; 765 } 766 Size s = (Size) obj; 767 return width == s.width && height == s.height; 768 } 769 @Override 770 public int hashCode() { 771 return width * 32713 + height; 772 } 773 /** width of the picture */ 774 public int width; 775 /** height of the picture */ 776 public int height; 777 }; 778 779 /** 780 * Handles the parameters for pictures created by a Camera service. 781 * 782 * <p>To make camera parameters take effect, applications have to call 783 * Camera.setParameters. For example, after setWhiteBalance is called, white 784 * balance is not changed until Camera.setParameters() is called. 785 * 786 * <p>Different devices may have different camera capabilities, such as 787 * picture size or flash modes. The application should query the camera 788 * capabilities before setting parameters. For example, the application 789 * should call getSupportedColorEffects before calling setEffect. If the 790 * camera does not support color effects, getSupportedColorEffects will 791 * return null. 792 */ 793 public class Parameters { 794 // Parameter keys to communicate with the camera driver. 795 private static final String KEY_PREVIEW_SIZE = "preview-size"; 796 private static final String KEY_PREVIEW_FORMAT = "preview-format"; 797 private static final String KEY_PREVIEW_FRAME_RATE = "preview-frame-rate"; 798 private static final String KEY_PICTURE_SIZE = "picture-size"; 799 private static final String KEY_PICTURE_FORMAT = "picture-format"; 800 private static final String KEY_JPEG_THUMBNAIL_SIZE = "jpeg-thumbnail-size"; 801 private static final String KEY_JPEG_THUMBNAIL_WIDTH = "jpeg-thumbnail-width"; 802 private static final String KEY_JPEG_THUMBNAIL_HEIGHT = "jpeg-thumbnail-height"; 803 private static final String KEY_JPEG_THUMBNAIL_QUALITY = "jpeg-thumbnail-quality"; 804 private static final String KEY_JPEG_QUALITY = "jpeg-quality"; 805 private static final String KEY_ROTATION = "rotation"; 806 private static final String KEY_GPS_LATITUDE = "gps-latitude"; 807 private static final String KEY_GPS_LONGITUDE = "gps-longitude"; 808 private static final String KEY_GPS_ALTITUDE = "gps-altitude"; 809 private static final String KEY_GPS_TIMESTAMP = "gps-timestamp"; 810 private static final String KEY_GPS_PROCESSING_METHOD = "gps-processing-method"; 811 private static final String KEY_WHITE_BALANCE = "whitebalance"; 812 private static final String KEY_EFFECT = "effect"; 813 private static final String KEY_ANTIBANDING = "antibanding"; 814 private static final String KEY_SCENE_MODE = "scene-mode"; 815 private static final String KEY_FLASH_MODE = "flash-mode"; 816 private static final String KEY_FOCUS_MODE = "focus-mode"; 817 private static final String KEY_FOCAL_LENGTH = "focal-length"; 818 private static final String KEY_HORIZONTAL_VIEW_ANGLE = "horizontal-view-angle"; 819 private static final String KEY_VERTICAL_VIEW_ANGLE = "vertical-view-angle"; 820 private static final String KEY_EXPOSURE_COMPENSATION = "exposure-compensation"; 821 private static final String KEY_MAX_EXPOSURE_COMPENSATION = "max-exposure-compensation"; 822 private static final String KEY_MIN_EXPOSURE_COMPENSATION = "min-exposure-compensation"; 823 private static final String KEY_EXPOSURE_COMPENSATION_STEP = "exposure-compensation-step"; 824 private static final String KEY_ZOOM = "zoom"; 825 private static final String KEY_MAX_ZOOM = "max-zoom"; 826 private static final String KEY_ZOOM_RATIOS = "zoom-ratios"; 827 private static final String KEY_ZOOM_SUPPORTED = "zoom-supported"; 828 private static final String KEY_SMOOTH_ZOOM_SUPPORTED = "smooth-zoom-supported"; 829 private static final String KEY_FOCUS_DISTANCES = "focus-distances"; 830 private static final String KEY_METERING_MODE = "metering-mode"; 831 832 // Parameter key suffix for supported values. 833 private static final String SUPPORTED_VALUES_SUFFIX = "-values"; 834 835 private static final String TRUE = "true"; 836 837 // Values for white balance settings. 838 public static final String WHITE_BALANCE_AUTO = "auto"; 839 public static final String WHITE_BALANCE_INCANDESCENT = "incandescent"; 840 public static final String WHITE_BALANCE_FLUORESCENT = "fluorescent"; 841 public static final String WHITE_BALANCE_WARM_FLUORESCENT = "warm-fluorescent"; 842 public static final String WHITE_BALANCE_DAYLIGHT = "daylight"; 843 public static final String WHITE_BALANCE_CLOUDY_DAYLIGHT = "cloudy-daylight"; 844 public static final String WHITE_BALANCE_TWILIGHT = "twilight"; 845 public static final String WHITE_BALANCE_SHADE = "shade"; 846 847 // Values for color effect settings. 848 public static final String EFFECT_NONE = "none"; 849 public static final String EFFECT_MONO = "mono"; 850 public static final String EFFECT_NEGATIVE = "negative"; 851 public static final String EFFECT_SOLARIZE = "solarize"; 852 public static final String EFFECT_SEPIA = "sepia"; 853 public static final String EFFECT_POSTERIZE = "posterize"; 854 public static final String EFFECT_WHITEBOARD = "whiteboard"; 855 public static final String EFFECT_BLACKBOARD = "blackboard"; 856 public static final String EFFECT_AQUA = "aqua"; 857 858 // Values for antibanding settings. 859 public static final String ANTIBANDING_AUTO = "auto"; 860 public static final String ANTIBANDING_50HZ = "50hz"; 861 public static final String ANTIBANDING_60HZ = "60hz"; 862 public static final String ANTIBANDING_OFF = "off"; 863 864 // Values for flash mode settings. 865 /** 866 * Flash will not be fired. 867 */ 868 public static final String FLASH_MODE_OFF = "off"; 869 870 /** 871 * Flash will be fired automatically when required. The flash may be fired 872 * during preview, auto-focus, or snapshot depending on the driver. 873 */ 874 public static final String FLASH_MODE_AUTO = "auto"; 875 876 /** 877 * Flash will always be fired during snapshot. The flash may also be 878 * fired during preview or auto-focus depending on the driver. 879 */ 880 public static final String FLASH_MODE_ON = "on"; 881 882 /** 883 * Flash will be fired in red-eye reduction mode. 884 */ 885 public static final String FLASH_MODE_RED_EYE = "red-eye"; 886 887 /** 888 * Constant emission of light during preview, auto-focus and snapshot. 889 * This can also be used for video recording. 890 */ 891 public static final String FLASH_MODE_TORCH = "torch"; 892 893 /** 894 * Scene mode is off. 895 */ 896 public static final String SCENE_MODE_AUTO = "auto"; 897 898 /** 899 * Take photos of fast moving objects. Same as {@link 900 * #SCENE_MODE_SPORTS}. 901 */ 902 public static final String SCENE_MODE_ACTION = "action"; 903 904 /** 905 * Take people pictures. 906 */ 907 public static final String SCENE_MODE_PORTRAIT = "portrait"; 908 909 /** 910 * Take pictures on distant objects. 911 */ 912 public static final String SCENE_MODE_LANDSCAPE = "landscape"; 913 914 /** 915 * Take photos at night. 916 */ 917 public static final String SCENE_MODE_NIGHT = "night"; 918 919 /** 920 * Take people pictures at night. 921 */ 922 public static final String SCENE_MODE_NIGHT_PORTRAIT = "night-portrait"; 923 924 /** 925 * Take photos in a theater. Flash light is off. 926 */ 927 public static final String SCENE_MODE_THEATRE = "theatre"; 928 929 /** 930 * Take pictures on the beach. 931 */ 932 public static final String SCENE_MODE_BEACH = "beach"; 933 934 /** 935 * Take pictures on the snow. 936 */ 937 public static final String SCENE_MODE_SNOW = "snow"; 938 939 /** 940 * Take sunset photos. 941 */ 942 public static final String SCENE_MODE_SUNSET = "sunset"; 943 944 /** 945 * Avoid blurry pictures (for example, due to hand shake). 946 */ 947 public static final String SCENE_MODE_STEADYPHOTO = "steadyphoto"; 948 949 /** 950 * For shooting firework displays. 951 */ 952 public static final String SCENE_MODE_FIREWORKS = "fireworks"; 953 954 /** 955 * Take photos of fast moving objects. Same as {@link 956 * #SCENE_MODE_ACTION}. 957 */ 958 public static final String SCENE_MODE_SPORTS = "sports"; 959 960 /** 961 * Take indoor low-light shot. 962 */ 963 public static final String SCENE_MODE_PARTY = "party"; 964 965 /** 966 * Capture the naturally warm color of scenes lit by candles. 967 */ 968 public static final String SCENE_MODE_CANDLELIGHT = "candlelight"; 969 970 /** 971 * Applications are looking for a barcode. Camera driver will be 972 * optimized for barcode reading. 973 */ 974 public static final String SCENE_MODE_BARCODE = "barcode"; 975 976 // Values for focus mode settings. 977 /** 978 * Auto-focus mode. 979 */ 980 public static final String FOCUS_MODE_AUTO = "auto"; 981 982 /** 983 * Focus is set at infinity. Applications should not call 984 * {@link #autoFocus(AutoFocusCallback)} in this mode. 985 */ 986 public static final String FOCUS_MODE_INFINITY = "infinity"; 987 public static final String FOCUS_MODE_MACRO = "macro"; 988 989 /** 990 * Focus is fixed. The camera is always in this mode if the focus is not 991 * adjustable. If the camera has auto-focus, this mode can fix the 992 * focus, which is usually at hyperfocal distance. Applications should 993 * not call {@link #autoFocus(AutoFocusCallback)} in this mode. 994 */ 995 public static final String FOCUS_MODE_FIXED = "fixed"; 996 997 /** 998 * Extended depth of field (EDOF). Focusing is done digitally and 999 * continuously. Applications should not call {@link 1000 * #autoFocus(AutoFocusCallback)} in this mode. 1001 */ 1002 public static final String FOCUS_MODE_EDOF = "edof"; 1003 1004 // Indices for focus distance array. 1005 /** 1006 * The array index of near focus distance for use with 1007 * {@link #getFocusDistances(float[])}. 1008 */ 1009 public static final int FOCUS_DISTANCE_NEAR_INDEX = 0; 1010 1011 /** 1012 * The array index of optimal focus distance for use with 1013 * {@link #getFocusDistances(float[])}. 1014 */ 1015 public static final int FOCUS_DISTANCE_OPTIMAL_INDEX = 1; 1016 1017 /** 1018 * The array index of far focus distance for use with 1019 * {@link #getFocusDistances(float[])}. 1020 */ 1021 public static final int FOCUS_DISTANCE_FAR_INDEX = 2; 1022 1023 /** 1024 * Continuous focus mode. The camera continuously tries to focus. This 1025 * is ideal for shooting video or shooting photo of moving object. 1026 * Continuous focus starts when {@link #autoFocus(AutoFocusCallback)} is 1027 * called. Continuous focus stops when {@link #cancelAutoFocus()} is 1028 * called. AutoFocusCallback will be only called once as soon as the 1029 * picture is in focus. 1030 */ 1031 public static final String FOCUS_MODE_CONTINUOUS = "continuous"; 1032 1033 /** 1034 * The camera determines the exposure by giving more weight to the 1035 * central part of the scene. 1036 */ 1037 public static final String METERING_MODE_CENTER_WEIGHTED = "center-weighted"; 1038 1039 /** 1040 * The camera determines the exposure by averaging the entire scene, 1041 * giving no weighting to any particular area. 1042 */ 1043 public static final String METERING_MODE_FRAME_AVERAGE = "frame-average"; 1044 1045 /** 1046 * The camera determines the exposure by a very small area of the scene, 1047 * typically the center. 1048 */ 1049 public static final String METERING_MODE_SPOT = "spot"; 1050 1051 // Formats for setPreviewFormat and setPictureFormat. 1052 private static final String PIXEL_FORMAT_YUV422SP = "yuv422sp"; 1053 private static final String PIXEL_FORMAT_YUV420SP = "yuv420sp"; 1054 private static final String PIXEL_FORMAT_YUV422I = "yuv422i-yuyv"; 1055 private static final String PIXEL_FORMAT_RGB565 = "rgb565"; 1056 private static final String PIXEL_FORMAT_JPEG = "jpeg"; 1057 1058 private HashMap<String, String> mMap; 1059 1060 private Parameters() { 1061 mMap = new HashMap<String, String>(); 1062 } 1063 1064 /** 1065 * Writes the current Parameters to the log. 1066 * @hide 1067 * @deprecated 1068 */ 1069 public void dump() { 1070 Log.e(TAG, "dump: size=" + mMap.size()); 1071 for (String k : mMap.keySet()) { 1072 Log.e(TAG, "dump: " + k + "=" + mMap.get(k)); 1073 } 1074 } 1075 1076 /** 1077 * Creates a single string with all the parameters set in 1078 * this Parameters object. 1079 * <p>The {@link #unflatten(String)} method does the reverse.</p> 1080 * 1081 * @return a String with all values from this Parameters object, in 1082 * semi-colon delimited key-value pairs 1083 */ 1084 public String flatten() { 1085 StringBuilder flattened = new StringBuilder(); 1086 for (String k : mMap.keySet()) { 1087 flattened.append(k); 1088 flattened.append("="); 1089 flattened.append(mMap.get(k)); 1090 flattened.append(";"); 1091 } 1092 // chop off the extra semicolon at the end 1093 flattened.deleteCharAt(flattened.length()-1); 1094 return flattened.toString(); 1095 } 1096 1097 /** 1098 * Takes a flattened string of parameters and adds each one to 1099 * this Parameters object. 1100 * <p>The {@link #flatten()} method does the reverse.</p> 1101 * 1102 * @param flattened a String of parameters (key-value paired) that 1103 * are semi-colon delimited 1104 */ 1105 public void unflatten(String flattened) { 1106 mMap.clear(); 1107 1108 StringTokenizer tokenizer = new StringTokenizer(flattened, ";"); 1109 while (tokenizer.hasMoreElements()) { 1110 String kv = tokenizer.nextToken(); 1111 int pos = kv.indexOf('='); 1112 if (pos == -1) { 1113 continue; 1114 } 1115 String k = kv.substring(0, pos); 1116 String v = kv.substring(pos + 1); 1117 mMap.put(k, v); 1118 } 1119 } 1120 1121 public void remove(String key) { 1122 mMap.remove(key); 1123 } 1124 1125 /** 1126 * Sets a String parameter. 1127 * 1128 * @param key the key name for the parameter 1129 * @param value the String value of the parameter 1130 */ 1131 public void set(String key, String value) { 1132 if (key.indexOf('=') != -1 || key.indexOf(';') != -1) { 1133 Log.e(TAG, "Key \"" + key + "\" contains invalid character (= or ;)"); 1134 return; 1135 } 1136 if (value.indexOf('=') != -1 || value.indexOf(';') != -1) { 1137 Log.e(TAG, "Value \"" + value + "\" contains invalid character (= or ;)"); 1138 return; 1139 } 1140 1141 mMap.put(key, value); 1142 } 1143 1144 /** 1145 * Sets an integer parameter. 1146 * 1147 * @param key the key name for the parameter 1148 * @param value the int value of the parameter 1149 */ 1150 public void set(String key, int value) { 1151 mMap.put(key, Integer.toString(value)); 1152 } 1153 1154 /** 1155 * Returns the value of a String parameter. 1156 * 1157 * @param key the key name for the parameter 1158 * @return the String value of the parameter 1159 */ 1160 public String get(String key) { 1161 return mMap.get(key); 1162 } 1163 1164 /** 1165 * Returns the value of an integer parameter. 1166 * 1167 * @param key the key name for the parameter 1168 * @return the int value of the parameter 1169 */ 1170 public int getInt(String key) { 1171 return Integer.parseInt(mMap.get(key)); 1172 } 1173 1174 /** 1175 * Sets the dimensions for preview pictures. 1176 * 1177 * @param width the width of the pictures, in pixels 1178 * @param height the height of the pictures, in pixels 1179 */ 1180 public void setPreviewSize(int width, int height) { 1181 String v = Integer.toString(width) + "x" + Integer.toString(height); 1182 set(KEY_PREVIEW_SIZE, v); 1183 } 1184 1185 /** 1186 * Returns the dimensions setting for preview pictures. 1187 * 1188 * @return a Size object with the height and width setting 1189 * for the preview picture 1190 */ 1191 public Size getPreviewSize() { 1192 String pair = get(KEY_PREVIEW_SIZE); 1193 return strToSize(pair); 1194 } 1195 1196 /** 1197 * Gets the supported preview sizes. 1198 * 1199 * @return a list of Size object. This method will always return a list 1200 * with at least one element. 1201 */ 1202 public List<Size> getSupportedPreviewSizes() { 1203 String str = get(KEY_PREVIEW_SIZE + SUPPORTED_VALUES_SUFFIX); 1204 return splitSize(str); 1205 } 1206 1207 /** 1208 * Sets the dimensions for EXIF thumbnail in Jpeg picture. If 1209 * applications set both width and height to 0, EXIF will not contain 1210 * thumbnail. 1211 * 1212 * @param width the width of the thumbnail, in pixels 1213 * @param height the height of the thumbnail, in pixels 1214 */ 1215 public void setJpegThumbnailSize(int width, int height) { 1216 set(KEY_JPEG_THUMBNAIL_WIDTH, width); 1217 set(KEY_JPEG_THUMBNAIL_HEIGHT, height); 1218 } 1219 1220 /** 1221 * Returns the dimensions for EXIF thumbnail in Jpeg picture. 1222 * 1223 * @return a Size object with the height and width setting for the EXIF 1224 * thumbnails 1225 */ 1226 public Size getJpegThumbnailSize() { 1227 return new Size(getInt(KEY_JPEG_THUMBNAIL_WIDTH), 1228 getInt(KEY_JPEG_THUMBNAIL_HEIGHT)); 1229 } 1230 1231 /** 1232 * Gets the supported jpeg thumbnail sizes. 1233 * 1234 * @return a list of Size object. This method will always return a list 1235 * with at least two elements. Size 0,0 (no thumbnail) is always 1236 * supported. 1237 */ 1238 public List<Size> getSupportedJpegThumbnailSizes() { 1239 String str = get(KEY_JPEG_THUMBNAIL_SIZE + SUPPORTED_VALUES_SUFFIX); 1240 return splitSize(str); 1241 } 1242 1243 /** 1244 * Sets the quality of the EXIF thumbnail in Jpeg picture. 1245 * 1246 * @param quality the JPEG quality of the EXIF thumbnail. The range is 1 1247 * to 100, with 100 being the best. 1248 */ 1249 public void setJpegThumbnailQuality(int quality) { 1250 set(KEY_JPEG_THUMBNAIL_QUALITY, quality); 1251 } 1252 1253 /** 1254 * Returns the quality setting for the EXIF thumbnail in Jpeg picture. 1255 * 1256 * @return the JPEG quality setting of the EXIF thumbnail. 1257 */ 1258 public int getJpegThumbnailQuality() { 1259 return getInt(KEY_JPEG_THUMBNAIL_QUALITY); 1260 } 1261 1262 /** 1263 * Sets Jpeg quality of captured picture. 1264 * 1265 * @param quality the JPEG quality of captured picture. The range is 1 1266 * to 100, with 100 being the best. 1267 */ 1268 public void setJpegQuality(int quality) { 1269 set(KEY_JPEG_QUALITY, quality); 1270 } 1271 1272 /** 1273 * Returns the quality setting for the JPEG picture. 1274 * 1275 * @return the JPEG picture quality setting. 1276 */ 1277 public int getJpegQuality() { 1278 return getInt(KEY_JPEG_QUALITY); 1279 } 1280 1281 /** 1282 * Sets the rate at which preview frames are received. This is the 1283 * target frame rate. The actual frame rate depends on the driver. 1284 * 1285 * @param fps the frame rate (frames per second) 1286 */ 1287 public void setPreviewFrameRate(int fps) { 1288 set(KEY_PREVIEW_FRAME_RATE, fps); 1289 } 1290 1291 /** 1292 * Returns the setting for the rate at which preview frames are 1293 * received. This is the target frame rate. The actual frame rate 1294 * depends on the driver. 1295 * 1296 * @return the frame rate setting (frames per second) 1297 */ 1298 public int getPreviewFrameRate() { 1299 return getInt(KEY_PREVIEW_FRAME_RATE); 1300 } 1301 1302 /** 1303 * Gets the supported preview frame rates. 1304 * 1305 * @return a list of supported preview frame rates. null if preview 1306 * frame rate setting is not supported. 1307 */ 1308 public List<Integer> getSupportedPreviewFrameRates() { 1309 String str = get(KEY_PREVIEW_FRAME_RATE + SUPPORTED_VALUES_SUFFIX); 1310 return splitInt(str); 1311 } 1312 1313 /** 1314 * Sets the image format for preview pictures. 1315 * <p>If this is never called, the default format will be 1316 * {@link android.graphics.ImageFormat#NV21}, which 1317 * uses the NV21 encoding format.</p> 1318 * 1319 * @param pixel_format the desired preview picture format, defined 1320 * by one of the {@link android.graphics.ImageFormat} constants. 1321 * (E.g., <var>ImageFormat.NV21</var> (default), 1322 * <var>ImageFormat.RGB_565</var>, or 1323 * <var>ImageFormat.JPEG</var>) 1324 * @see android.graphics.ImageFormat 1325 */ 1326 public void setPreviewFormat(int pixel_format) { 1327 String s = cameraFormatForPixelFormat(pixel_format); 1328 if (s == null) { 1329 throw new IllegalArgumentException( 1330 "Invalid pixel_format=" + pixel_format); 1331 } 1332 1333 set(KEY_PREVIEW_FORMAT, s); 1334 } 1335 1336 /** 1337 * Returns the image format for preview frames got from 1338 * {@link PreviewCallback}. 1339 * 1340 * @return the preview format. 1341 * @see android.graphics.ImageFormat 1342 */ 1343 public int getPreviewFormat() { 1344 return pixelFormatForCameraFormat(get(KEY_PREVIEW_FORMAT)); 1345 } 1346 1347 /** 1348 * Gets the supported preview formats. 1349 * 1350 * @return a list of supported preview formats. This method will always 1351 * return a list with at least one element. 1352 * @see android.graphics.ImageFormat 1353 */ 1354 public List<Integer> getSupportedPreviewFormats() { 1355 String str = get(KEY_PREVIEW_FORMAT + SUPPORTED_VALUES_SUFFIX); 1356 ArrayList<Integer> formats = new ArrayList<Integer>(); 1357 for (String s : split(str)) { 1358 int f = pixelFormatForCameraFormat(s); 1359 if (f == ImageFormat.UNKNOWN) continue; 1360 formats.add(f); 1361 } 1362 return formats; 1363 } 1364 1365 /** 1366 * Sets the dimensions for pictures. 1367 * 1368 * @param width the width for pictures, in pixels 1369 * @param height the height for pictures, in pixels 1370 */ 1371 public void setPictureSize(int width, int height) { 1372 String v = Integer.toString(width) + "x" + Integer.toString(height); 1373 set(KEY_PICTURE_SIZE, v); 1374 } 1375 1376 /** 1377 * Returns the dimension setting for pictures. 1378 * 1379 * @return a Size object with the height and width setting 1380 * for pictures 1381 */ 1382 public Size getPictureSize() { 1383 String pair = get(KEY_PICTURE_SIZE); 1384 return strToSize(pair); 1385 } 1386 1387 /** 1388 * Gets the supported picture sizes. 1389 * 1390 * @return a list of supported picture sizes. This method will always 1391 * return a list with at least one element. 1392 */ 1393 public List<Size> getSupportedPictureSizes() { 1394 String str = get(KEY_PICTURE_SIZE + SUPPORTED_VALUES_SUFFIX); 1395 return splitSize(str); 1396 } 1397 1398 /** 1399 * Sets the image format for pictures. 1400 * 1401 * @param pixel_format the desired picture format 1402 * (<var>ImageFormat.NV21</var>, 1403 * <var>ImageFormat.RGB_565</var>, or 1404 * <var>ImageFormat.JPEG</var>) 1405 * @see android.graphics.ImageFormat 1406 */ 1407 public void setPictureFormat(int pixel_format) { 1408 String s = cameraFormatForPixelFormat(pixel_format); 1409 if (s == null) { 1410 throw new IllegalArgumentException( 1411 "Invalid pixel_format=" + pixel_format); 1412 } 1413 1414 set(KEY_PICTURE_FORMAT, s); 1415 } 1416 1417 /** 1418 * Returns the image format for pictures. 1419 * 1420 * @return the picture format 1421 * @see android.graphics.ImageFormat 1422 */ 1423 public int getPictureFormat() { 1424 return pixelFormatForCameraFormat(get(KEY_PICTURE_FORMAT)); 1425 } 1426 1427 /** 1428 * Gets the supported picture formats. 1429 * 1430 * @return supported picture formats. This method will always return a 1431 * list with at least one element. 1432 * @see android.graphics.ImageFormat 1433 */ 1434 public List<Integer> getSupportedPictureFormats() { 1435 String str = get(KEY_PICTURE_FORMAT + SUPPORTED_VALUES_SUFFIX); 1436 ArrayList<Integer> formats = new ArrayList<Integer>(); 1437 for (String s : split(str)) { 1438 int f = pixelFormatForCameraFormat(s); 1439 if (f == ImageFormat.UNKNOWN) continue; 1440 formats.add(f); 1441 } 1442 return formats; 1443 } 1444 1445 private String cameraFormatForPixelFormat(int pixel_format) { 1446 switch(pixel_format) { 1447 case ImageFormat.NV16: return PIXEL_FORMAT_YUV422SP; 1448 case ImageFormat.NV21: return PIXEL_FORMAT_YUV420SP; 1449 case ImageFormat.YUY2: return PIXEL_FORMAT_YUV422I; 1450 case ImageFormat.RGB_565: return PIXEL_FORMAT_RGB565; 1451 case ImageFormat.JPEG: return PIXEL_FORMAT_JPEG; 1452 default: return null; 1453 } 1454 } 1455 1456 private int pixelFormatForCameraFormat(String format) { 1457 if (format == null) 1458 return ImageFormat.UNKNOWN; 1459 1460 if (format.equals(PIXEL_FORMAT_YUV422SP)) 1461 return ImageFormat.NV16; 1462 1463 if (format.equals(PIXEL_FORMAT_YUV420SP)) 1464 return ImageFormat.NV21; 1465 1466 if (format.equals(PIXEL_FORMAT_YUV422I)) 1467 return ImageFormat.YUY2; 1468 1469 if (format.equals(PIXEL_FORMAT_RGB565)) 1470 return ImageFormat.RGB_565; 1471 1472 if (format.equals(PIXEL_FORMAT_JPEG)) 1473 return ImageFormat.JPEG; 1474 1475 return ImageFormat.UNKNOWN; 1476 } 1477 1478 /** 1479 * Sets the orientation of the device in degrees. For example, suppose 1480 * the natural position of the device is landscape. If the user takes a 1481 * picture in landscape mode in 2048x1536 resolution, the rotation 1482 * should be set to 0. If the user rotates the phone 90 degrees 1483 * clockwise, the rotation should be set to 90. Applications can use 1484 * {@link android.view.OrientationEventListener} to set this parameter. 1485 * 1486 * The camera driver may set orientation in the EXIF header without 1487 * rotating the picture. Or the driver may rotate the picture and 1488 * the EXIF thumbnail. If the Jpeg picture is rotated, the orientation 1489 * in the EXIF header will be missing or 1 (row #0 is top and column #0 1490 * is left side). 1491 * 1492 * @param rotation The orientation of the device in degrees. Rotation 1493 * can only be 0, 90, 180 or 270. 1494 * @throws IllegalArgumentException if rotation value is invalid. 1495 * @see android.view.OrientationEventListener 1496 */ 1497 public void setRotation(int rotation) { 1498 if (rotation == 0 || rotation == 90 || rotation == 180 1499 || rotation == 270) { 1500 set(KEY_ROTATION, Integer.toString(rotation)); 1501 } else { 1502 throw new IllegalArgumentException( 1503 "Invalid rotation=" + rotation); 1504 } 1505 } 1506 1507 /** 1508 * Sets GPS latitude coordinate. This will be stored in JPEG EXIF 1509 * header. 1510 * 1511 * @param latitude GPS latitude coordinate. 1512 */ 1513 public void setGpsLatitude(double latitude) { 1514 set(KEY_GPS_LATITUDE, Double.toString(latitude)); 1515 } 1516 1517 /** 1518 * Sets GPS longitude coordinate. This will be stored in JPEG EXIF 1519 * header. 1520 * 1521 * @param longitude GPS longitude coordinate. 1522 */ 1523 public void setGpsLongitude(double longitude) { 1524 set(KEY_GPS_LONGITUDE, Double.toString(longitude)); 1525 } 1526 1527 /** 1528 * Sets GPS altitude. This will be stored in JPEG EXIF header. 1529 * 1530 * @param altitude GPS altitude in meters. 1531 */ 1532 public void setGpsAltitude(double altitude) { 1533 set(KEY_GPS_ALTITUDE, Double.toString(altitude)); 1534 } 1535 1536 /** 1537 * Sets GPS timestamp. This will be stored in JPEG EXIF header. 1538 * 1539 * @param timestamp GPS timestamp (UTC in seconds since January 1, 1540 * 1970). 1541 */ 1542 public void setGpsTimestamp(long timestamp) { 1543 set(KEY_GPS_TIMESTAMP, Long.toString(timestamp)); 1544 } 1545 1546 /** 1547 * Sets GPS processing method. It will store up to 32 characters 1548 * in JPEG EXIF header. 1549 * 1550 * @param processing_method The processing method to get this location. 1551 */ 1552 public void setGpsProcessingMethod(String processing_method) { 1553 set(KEY_GPS_PROCESSING_METHOD, processing_method); 1554 } 1555 1556 /** 1557 * Removes GPS latitude, longitude, altitude, and timestamp from the 1558 * parameters. 1559 */ 1560 public void removeGpsData() { 1561 remove(KEY_GPS_LATITUDE); 1562 remove(KEY_GPS_LONGITUDE); 1563 remove(KEY_GPS_ALTITUDE); 1564 remove(KEY_GPS_TIMESTAMP); 1565 remove(KEY_GPS_PROCESSING_METHOD); 1566 } 1567 1568 /** 1569 * Gets the current white balance setting. 1570 * 1571 * @return current white balance. null if white balance setting is not 1572 * supported. 1573 * @see #WHITE_BALANCE_AUTO 1574 * @see #WHITE_BALANCE_INCANDESCENT 1575 * @see #WHITE_BALANCE_FLUORESCENT 1576 * @see #WHITE_BALANCE_WARM_FLUORESCENT 1577 * @see #WHITE_BALANCE_DAYLIGHT 1578 * @see #WHITE_BALANCE_CLOUDY_DAYLIGHT 1579 * @see #WHITE_BALANCE_TWILIGHT 1580 * @see #WHITE_BALANCE_SHADE 1581 * 1582 */ 1583 public String getWhiteBalance() { 1584 return get(KEY_WHITE_BALANCE); 1585 } 1586 1587 /** 1588 * Sets the white balance. 1589 * 1590 * @param value new white balance. 1591 * @see #getWhiteBalance() 1592 */ 1593 public void setWhiteBalance(String value) { 1594 set(KEY_WHITE_BALANCE, value); 1595 } 1596 1597 /** 1598 * Gets the supported white balance. 1599 * 1600 * @return a list of supported white balance. null if white balance 1601 * setting is not supported. 1602 * @see #getWhiteBalance() 1603 */ 1604 public List<String> getSupportedWhiteBalance() { 1605 String str = get(KEY_WHITE_BALANCE + SUPPORTED_VALUES_SUFFIX); 1606 return split(str); 1607 } 1608 1609 /** 1610 * Gets the current color effect setting. 1611 * 1612 * @return current color effect. null if color effect 1613 * setting is not supported. 1614 * @see #EFFECT_NONE 1615 * @see #EFFECT_MONO 1616 * @see #EFFECT_NEGATIVE 1617 * @see #EFFECT_SOLARIZE 1618 * @see #EFFECT_SEPIA 1619 * @see #EFFECT_POSTERIZE 1620 * @see #EFFECT_WHITEBOARD 1621 * @see #EFFECT_BLACKBOARD 1622 * @see #EFFECT_AQUA 1623 */ 1624 public String getColorEffect() { 1625 return get(KEY_EFFECT); 1626 } 1627 1628 /** 1629 * Sets the current color effect setting. 1630 * 1631 * @param value new color effect. 1632 * @see #getColorEffect() 1633 */ 1634 public void setColorEffect(String value) { 1635 set(KEY_EFFECT, value); 1636 } 1637 1638 /** 1639 * Gets the supported color effects. 1640 * 1641 * @return a list of supported color effects. null if color effect 1642 * setting is not supported. 1643 * @see #getColorEffect() 1644 */ 1645 public List<String> getSupportedColorEffects() { 1646 String str = get(KEY_EFFECT + SUPPORTED_VALUES_SUFFIX); 1647 return split(str); 1648 } 1649 1650 1651 /** 1652 * Gets the current antibanding setting. 1653 * 1654 * @return current antibanding. null if antibanding setting is not 1655 * supported. 1656 * @see #ANTIBANDING_AUTO 1657 * @see #ANTIBANDING_50HZ 1658 * @see #ANTIBANDING_60HZ 1659 * @see #ANTIBANDING_OFF 1660 */ 1661 public String getAntibanding() { 1662 return get(KEY_ANTIBANDING); 1663 } 1664 1665 /** 1666 * Sets the antibanding. 1667 * 1668 * @param antibanding new antibanding value. 1669 * @see #getAntibanding() 1670 */ 1671 public void setAntibanding(String antibanding) { 1672 set(KEY_ANTIBANDING, antibanding); 1673 } 1674 1675 /** 1676 * Gets the supported antibanding values. 1677 * 1678 * @return a list of supported antibanding values. null if antibanding 1679 * setting is not supported. 1680 * @see #getAntibanding() 1681 */ 1682 public List<String> getSupportedAntibanding() { 1683 String str = get(KEY_ANTIBANDING + SUPPORTED_VALUES_SUFFIX); 1684 return split(str); 1685 } 1686 1687 /** 1688 * Gets the current scene mode setting. 1689 * 1690 * @return one of SCENE_MODE_XXX string constant. null if scene mode 1691 * setting is not supported. 1692 * @see #SCENE_MODE_AUTO 1693 * @see #SCENE_MODE_ACTION 1694 * @see #SCENE_MODE_PORTRAIT 1695 * @see #SCENE_MODE_LANDSCAPE 1696 * @see #SCENE_MODE_NIGHT 1697 * @see #SCENE_MODE_NIGHT_PORTRAIT 1698 * @see #SCENE_MODE_THEATRE 1699 * @see #SCENE_MODE_BEACH 1700 * @see #SCENE_MODE_SNOW 1701 * @see #SCENE_MODE_SUNSET 1702 * @see #SCENE_MODE_STEADYPHOTO 1703 * @see #SCENE_MODE_FIREWORKS 1704 * @see #SCENE_MODE_SPORTS 1705 * @see #SCENE_MODE_PARTY 1706 * @see #SCENE_MODE_CANDLELIGHT 1707 */ 1708 public String getSceneMode() { 1709 return get(KEY_SCENE_MODE); 1710 } 1711 1712 /** 1713 * Sets the scene mode. Changing scene mode may override other 1714 * parameters (such as flash mode, focus mode, white balance). For 1715 * example, suppose originally flash mode is on and supported flash 1716 * modes are on/off. In night scene mode, both flash mode and supported 1717 * flash mode may be changed to off. After setting scene mode, 1718 * applications should call getParameters to know if some parameters are 1719 * changed. 1720 * 1721 * @param value scene mode. 1722 * @see #getSceneMode() 1723 */ 1724 public void setSceneMode(String value) { 1725 set(KEY_SCENE_MODE, value); 1726 } 1727 1728 /** 1729 * Gets the supported scene modes. 1730 * 1731 * @return a list of supported scene modes. null if scene mode setting 1732 * is not supported. 1733 * @see #getSceneMode() 1734 */ 1735 public List<String> getSupportedSceneModes() { 1736 String str = get(KEY_SCENE_MODE + SUPPORTED_VALUES_SUFFIX); 1737 return split(str); 1738 } 1739 1740 /** 1741 * Gets the current flash mode setting. 1742 * 1743 * @return current flash mode. null if flash mode setting is not 1744 * supported. 1745 * @see #FLASH_MODE_OFF 1746 * @see #FLASH_MODE_AUTO 1747 * @see #FLASH_MODE_ON 1748 * @see #FLASH_MODE_RED_EYE 1749 * @see #FLASH_MODE_TORCH 1750 */ 1751 public String getFlashMode() { 1752 return get(KEY_FLASH_MODE); 1753 } 1754 1755 /** 1756 * Sets the flash mode. 1757 * 1758 * @param value flash mode. 1759 * @see #getFlashMode() 1760 */ 1761 public void setFlashMode(String value) { 1762 set(KEY_FLASH_MODE, value); 1763 } 1764 1765 /** 1766 * Gets the supported flash modes. 1767 * 1768 * @return a list of supported flash modes. null if flash mode setting 1769 * is not supported. 1770 * @see #getFlashMode() 1771 */ 1772 public List<String> getSupportedFlashModes() { 1773 String str = get(KEY_FLASH_MODE + SUPPORTED_VALUES_SUFFIX); 1774 return split(str); 1775 } 1776 1777 /** 1778 * Gets the current focus mode setting. 1779 * 1780 * @return current focus mode. If the camera does not support 1781 * auto-focus, this should return {@link #FOCUS_MODE_FIXED}. If 1782 * the focus mode is not FOCUS_MODE_FIXED or {@link 1783 * #FOCUS_MODE_INFINITY}, applications should call {@link 1784 * #autoFocus(AutoFocusCallback)} to start the focus. 1785 * @see #FOCUS_MODE_AUTO 1786 * @see #FOCUS_MODE_INFINITY 1787 * @see #FOCUS_MODE_MACRO 1788 * @see #FOCUS_MODE_FIXED 1789 */ 1790 public String getFocusMode() { 1791 return get(KEY_FOCUS_MODE); 1792 } 1793 1794 /** 1795 * Sets the focus mode. 1796 * 1797 * @param value focus mode. 1798 * @see #getFocusMode() 1799 */ 1800 public void setFocusMode(String value) { 1801 set(KEY_FOCUS_MODE, value); 1802 } 1803 1804 /** 1805 * Gets the supported focus modes. 1806 * 1807 * @return a list of supported focus modes. This method will always 1808 * return a list with at least one element. 1809 * @see #getFocusMode() 1810 */ 1811 public List<String> getSupportedFocusModes() { 1812 String str = get(KEY_FOCUS_MODE + SUPPORTED_VALUES_SUFFIX); 1813 return split(str); 1814 } 1815 1816 /** 1817 * Gets the focal length (in millimeter) of the camera. 1818 * 1819 * @return the focal length. This method will always return a valid 1820 * value. 1821 */ 1822 public float getFocalLength() { 1823 return Float.parseFloat(get(KEY_FOCAL_LENGTH)); 1824 } 1825 1826 /** 1827 * Gets the horizontal angle of view in degrees. 1828 * 1829 * @return horizontal angle of view. This method will always return a 1830 * valid value. 1831 */ 1832 public float getHorizontalViewAngle() { 1833 return Float.parseFloat(get(KEY_HORIZONTAL_VIEW_ANGLE)); 1834 } 1835 1836 /** 1837 * Gets the vertical angle of view in degrees. 1838 * 1839 * @return vertical angle of view. This method will always return a 1840 * valid value. 1841 */ 1842 public float getVerticalViewAngle() { 1843 return Float.parseFloat(get(KEY_VERTICAL_VIEW_ANGLE)); 1844 } 1845 1846 /** 1847 * Gets the current exposure compensation index. 1848 * 1849 * @return current exposure compensation index. The range is {@link 1850 * #getMinExposureCompensation} to {@link 1851 * #getMaxExposureCompensation}. 0 means exposure is not 1852 * adjusted. 1853 */ 1854 public int getExposureCompensation() { 1855 return getInt(KEY_EXPOSURE_COMPENSATION, 0); 1856 } 1857 1858 /** 1859 * Sets the exposure compensation index. 1860 * 1861 * @param value exposure compensation index. The valid value range is 1862 * from {@link #getMinExposureCompensation} (inclusive) to {@link 1863 * #getMaxExposureCompensation} (inclusive). 0 means exposure is 1864 * not adjusted. Application should call 1865 * getMinExposureCompensation and getMaxExposureCompensation to 1866 * know if exposure compensation is supported. 1867 */ 1868 public void setExposureCompensation(int value) { 1869 set(KEY_EXPOSURE_COMPENSATION, value); 1870 } 1871 1872 /** 1873 * Gets the maximum exposure compensation index. 1874 * 1875 * @return maximum exposure compensation index (>=0). If both this 1876 * method and {@link #getMinExposureCompensation} return 0, 1877 * exposure compensation is not supported. 1878 */ 1879 public int getMaxExposureCompensation() { 1880 return getInt(KEY_MAX_EXPOSURE_COMPENSATION, 0); 1881 } 1882 1883 /** 1884 * Gets the minimum exposure compensation index. 1885 * 1886 * @return minimum exposure compensation index (<=0). If both this 1887 * method and {@link #getMaxExposureCompensation} return 0, 1888 * exposure compensation is not supported. 1889 */ 1890 public int getMinExposureCompensation() { 1891 return getInt(KEY_MIN_EXPOSURE_COMPENSATION, 0); 1892 } 1893 1894 /** 1895 * Gets the exposure compensation step. 1896 * 1897 * @return exposure compensation step. Applications can get EV by 1898 * multiplying the exposure compensation index and step. Ex: if 1899 * exposure compensation index is -6 and step is 0.333333333, EV 1900 * is -2. 1901 */ 1902 public float getExposureCompensationStep() { 1903 return getFloat(KEY_EXPOSURE_COMPENSATION_STEP, 0); 1904 } 1905 1906 /** 1907 * Gets current zoom value. This also works when smooth zoom is in 1908 * progress. Applications should check {@link #isZoomSupported} before 1909 * using this method. 1910 * 1911 * @return the current zoom value. The range is 0 to {@link 1912 * #getMaxZoom}. 0 means the camera is not zoomed. 1913 */ 1914 public int getZoom() { 1915 return getInt(KEY_ZOOM, 0); 1916 } 1917 1918 /** 1919 * Sets current zoom value. If the camera is zoomed (value > 0), the 1920 * actual picture size may be smaller than picture size setting. 1921 * Applications can check the actual picture size after picture is 1922 * returned from {@link PictureCallback}. The preview size remains the 1923 * same in zoom. Applications should check {@link #isZoomSupported} 1924 * before using this method. 1925 * 1926 * @param value zoom value. The valid range is 0 to {@link #getMaxZoom}. 1927 */ 1928 public void setZoom(int value) { 1929 set(KEY_ZOOM, value); 1930 } 1931 1932 /** 1933 * Returns true if zoom is supported. Applications should call this 1934 * before using other zoom methods. 1935 * 1936 * @return true if zoom is supported. 1937 */ 1938 public boolean isZoomSupported() { 1939 String str = get(KEY_ZOOM_SUPPORTED); 1940 return TRUE.equals(str); 1941 } 1942 1943 /** 1944 * Gets the maximum zoom value allowed for snapshot. This is the maximum 1945 * value that applications can set to {@link #setZoom(int)}. 1946 * Applications should call {@link #isZoomSupported} before using this 1947 * method. This value may change in different preview size. Applications 1948 * should call this again after setting preview size. 1949 * 1950 * @return the maximum zoom value supported by the camera. 1951 */ 1952 public int getMaxZoom() { 1953 return getInt(KEY_MAX_ZOOM, 0); 1954 } 1955 1956 /** 1957 * Gets the zoom ratios of all zoom values. Applications should check 1958 * {@link #isZoomSupported} before using this method. 1959 * 1960 * @return the zoom ratios in 1/100 increments. Ex: a zoom of 3.2x is 1961 * returned as 320. The number of elements is {@link 1962 * #getMaxZoom} + 1. The list is sorted from small to large. The 1963 * first element is always 100. The last element is the zoom 1964 * ratio of the maximum zoom value. 1965 */ 1966 public List<Integer> getZoomRatios() { 1967 return splitInt(get(KEY_ZOOM_RATIOS)); 1968 } 1969 1970 /** 1971 * Returns true if smooth zoom is supported. Applications should call 1972 * this before using other smooth zoom methods. 1973 * 1974 * @return true if smooth zoom is supported. 1975 */ 1976 public boolean isSmoothZoomSupported() { 1977 String str = get(KEY_SMOOTH_ZOOM_SUPPORTED); 1978 return TRUE.equals(str); 1979 } 1980 1981 /** 1982 * Gets the distances from the camera to where an object appears to be 1983 * in focus. The object is sharpest at the optimal focus distance. The 1984 * depth of field is the far focus distance minus near focus distance. 1985 * 1986 * Focus distances may change after calling {@link 1987 * #autoFocus(AutoFocusCallback)}, {@link #cancelAutoFocus}, or {@link 1988 * #startPreview()}. Applications can call {@link #getParameters()} 1989 * and this method anytime to get the latest focus distances. If the 1990 * focus mode is FOCUS_MODE_CONTINUOUS and autofocus has started, focus 1991 * distances may change from time to time. 1992 * 1993 * Far focus distance >= optimal focus distance >= near focus distance. 1994 * If the focus distance is infinity, the value will be 1995 * Float.POSITIVE_INFINITY. 1996 * 1997 * @param output focus distances in meters. output must be a float 1998 * array with three elements. Near focus distance, optimal focus 1999 * distance, and far focus distance will be filled in the array. 2000 * @see #FOCUS_DISTANCE_NEAR_INDEX 2001 * @see #FOCUS_DISTANCE_OPTIMAL_INDEX 2002 * @see #FOCUS_DISTANCE_FAR_INDEX 2003 */ 2004 public void getFocusDistances(float[] output) { 2005 if (output == null || output.length != 3) { 2006 throw new IllegalArgumentException( 2007 "output must be an float array with three elements."); 2008 } 2009 List<Float> distances = splitFloat(get(KEY_FOCUS_DISTANCES)); 2010 output[0] = distances.get(0); 2011 output[1] = distances.get(1); 2012 output[2] = distances.get(2); 2013 } 2014 2015 /** 2016 * Gets the supported metering modes. 2017 * 2018 * @return a list of supported metering modes. null if metering mode 2019 * setting is not supported. 2020 * @see #getMeteringMode() 2021 */ 2022 public List<String> getSupportedMeteringModes() { 2023 String str = get(KEY_METERING_MODE + SUPPORTED_VALUES_SUFFIX); 2024 return split(str); 2025 } 2026 2027 /** 2028 * Gets the current metering mode, which affects how camera determines 2029 * exposure. 2030 * 2031 * @return current metering mode. If the camera does not support 2032 * metering setting, this should return null. 2033 * @see #METERING_MODE_CENTER_WEIGHTED 2034 * @see #METERING_MODE_FRAME_AVERAGE 2035 * @see #METERING_MODE_SPOT 2036 */ 2037 public String getMeteringMode() { 2038 return get(KEY_METERING_MODE); 2039 } 2040 2041 /** 2042 * Sets the metering mode. 2043 * 2044 * @param value metering mode. 2045 * @see #getMeteringMode() 2046 */ 2047 public void setMeteringMode(String value) { 2048 set(KEY_METERING_MODE, value); 2049 } 2050 2051 // Splits a comma delimited string to an ArrayList of String. 2052 // Return null if the passing string is null or the size is 0. 2053 private ArrayList<String> split(String str) { 2054 if (str == null) return null; 2055 2056 // Use StringTokenizer because it is faster than split. 2057 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2058 ArrayList<String> substrings = new ArrayList<String>(); 2059 while (tokenizer.hasMoreElements()) { 2060 substrings.add(tokenizer.nextToken()); 2061 } 2062 return substrings; 2063 } 2064 2065 // Splits a comma delimited string to an ArrayList of Integer. 2066 // Return null if the passing string is null or the size is 0. 2067 private ArrayList<Integer> splitInt(String str) { 2068 if (str == null) return null; 2069 2070 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2071 ArrayList<Integer> substrings = new ArrayList<Integer>(); 2072 while (tokenizer.hasMoreElements()) { 2073 String token = tokenizer.nextToken(); 2074 substrings.add(Integer.parseInt(token)); 2075 } 2076 if (substrings.size() == 0) return null; 2077 return substrings; 2078 } 2079 2080 // Splits a comma delimited string to an ArrayList of Float. 2081 // Return null if the passing string is null or the size is 0. 2082 private ArrayList<Float> splitFloat(String str) { 2083 if (str == null) return null; 2084 2085 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2086 ArrayList<Float> substrings = new ArrayList<Float>(); 2087 while (tokenizer.hasMoreElements()) { 2088 String token = tokenizer.nextToken(); 2089 substrings.add(Float.parseFloat(token)); 2090 } 2091 if (substrings.size() == 0) return null; 2092 return substrings; 2093 } 2094 2095 // Returns the value of a float parameter. 2096 private float getFloat(String key, float defaultValue) { 2097 try { 2098 return Float.parseFloat(mMap.get(key)); 2099 } catch (NumberFormatException ex) { 2100 return defaultValue; 2101 } 2102 } 2103 2104 // Returns the value of a integer parameter. 2105 private int getInt(String key, int defaultValue) { 2106 try { 2107 return Integer.parseInt(mMap.get(key)); 2108 } catch (NumberFormatException ex) { 2109 return defaultValue; 2110 } 2111 } 2112 2113 // Splits a comma delimited string to an ArrayList of Size. 2114 // Return null if the passing string is null or the size is 0. 2115 private ArrayList<Size> splitSize(String str) { 2116 if (str == null) return null; 2117 2118 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2119 ArrayList<Size> sizeList = new ArrayList<Size>(); 2120 while (tokenizer.hasMoreElements()) { 2121 Size size = strToSize(tokenizer.nextToken()); 2122 if (size != null) sizeList.add(size); 2123 } 2124 if (sizeList.size() == 0) return null; 2125 return sizeList; 2126 } 2127 2128 // Parses a string (ex: "480x320") to Size object. 2129 // Return null if the passing string is null. 2130 private Size strToSize(String str) { 2131 if (str == null) return null; 2132 2133 int pos = str.indexOf('x'); 2134 if (pos != -1) { 2135 String width = str.substring(0, pos); 2136 String height = str.substring(pos + 1); 2137 return new Size(Integer.parseInt(width), 2138 Integer.parseInt(height)); 2139 } 2140 Log.e(TAG, "Invalid size parameter string=" + str); 2141 return null; 2142 } 2143 }; 2144} 2145