Camera.java revision f3f25bf80b7d21f12442da8f82d17c79dd371692
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 */ 89 public native static int getNumberOfCameras(); 90 91 /** 92 * Returns the information about the camera. 93 * If {@link #getNumberOfCameras()} returns N, the valid id is 0 to N-1. 94 */ 95 public native static void getCameraInfo(int cameraId, CameraInfo cameraInfo); 96 97 /** 98 * Information about a camera 99 */ 100 public static class CameraInfo { 101 public static final int CAMERA_FACING_BACK = 0; 102 public static final int CAMERA_FACING_FRONT = 1; 103 104 /** 105 * The direction that the camera faces to. It should be 106 * CAMERA_FACING_BACK or CAMERA_FACING_FRONT. 107 */ 108 public int mFacing; 109 110 /** 111 * The orientation of the camera image. The value is the angle that the 112 * camera image needs to be rotated clockwise so it shows correctly on 113 * the display in its natural orientation. It should be 0, 90, 180, or 270. 114 * 115 * For example, suppose a device has a naturally tall screen, but the camera 116 * sensor is mounted in landscape. If the top side of the camera sensor is 117 * aligned with the right edge of the display in natural orientation, the 118 * value should be 90. 119 * 120 * @see #setDisplayOrientation(int) 121 */ 122 public int mOrientation; 123 }; 124 125 /** 126 * Returns a new Camera object. 127 * If {@link #getNumberOfCameras()} returns N, the valid id is 0 to N-1. 128 * The id 0 is the default camera. 129 */ 130 public static Camera open(int cameraId) { 131 return new Camera(cameraId); 132 } 133 134 /** 135 * The id for the default camera. 136 */ 137 public static int CAMERA_ID_DEFAULT = 0; 138 139 /** 140 * Returns a new Camera object. This returns the default camera. 141 */ 142 public static Camera open() { 143 return new Camera(CAMERA_ID_DEFAULT); 144 } 145 146 Camera(int cameraId) { 147 mShutterCallback = null; 148 mRawImageCallback = null; 149 mJpegCallback = null; 150 mPreviewCallback = null; 151 mPostviewCallback = null; 152 mZoomListener = null; 153 154 Looper looper; 155 if ((looper = Looper.myLooper()) != null) { 156 mEventHandler = new EventHandler(this, looper); 157 } else if ((looper = Looper.getMainLooper()) != null) { 158 mEventHandler = new EventHandler(this, looper); 159 } else { 160 mEventHandler = null; 161 } 162 163 native_setup(new WeakReference<Camera>(this), cameraId); 164 } 165 166 protected void finalize() { 167 native_release(); 168 } 169 170 private native final void native_setup(Object camera_this, int cameraId); 171 private native final void native_release(); 172 173 174 /** 175 * Disconnects and releases the Camera object resources. 176 * <p>It is recommended that you call this as soon as you're done with the 177 * Camera object.</p> 178 */ 179 public final void release() { 180 native_release(); 181 } 182 183 /** 184 * Reconnect to the camera after passing it to MediaRecorder. To save 185 * setup/teardown time, a client of Camera can pass an initialized Camera 186 * object to a MediaRecorder to use for video recording. Once the 187 * MediaRecorder is done with the Camera, this method can be used to 188 * re-establish a connection with the camera hardware. NOTE: The Camera 189 * object must first be unlocked by the process that owns it before it 190 * can be connected to another process. 191 * 192 * @throws IOException if the method fails. 193 */ 194 public native final void reconnect() throws IOException; 195 196 /** 197 * Lock the camera to prevent other processes from accessing it. To save 198 * setup/teardown time, a client of Camera can pass an initialized Camera 199 * object to another process. This method is used to re-lock the Camera 200 * object prevent other processes from accessing it. By default, the 201 * Camera object is locked. Locking it again from the same process will 202 * have no effect. Attempting to lock it from another process if it has 203 * not been unlocked will fail. 204 * 205 * @throws RuntimeException if the method fails. 206 */ 207 public native final void lock(); 208 209 /** 210 * Unlock the camera to allow another process to access it. To save 211 * setup/teardown time, a client of Camera can pass an initialized Camera 212 * object to another process. This method is used to unlock the Camera 213 * object before handing off the Camera object to the other process. 214 * 215 * @throws RuntimeException if the method fails. 216 */ 217 public native final void unlock(); 218 219 /** 220 * Sets the SurfaceHolder to be used for a picture preview. If the surface 221 * changed since the last call, the screen will blank. Nothing happens 222 * if the same surface is re-set. 223 * 224 * @param holder the SurfaceHolder upon which to place the picture preview 225 * @throws IOException if the method fails. 226 */ 227 public final void setPreviewDisplay(SurfaceHolder holder) throws IOException { 228 if (holder != null) { 229 setPreviewDisplay(holder.getSurface()); 230 } else { 231 setPreviewDisplay((Surface)null); 232 } 233 } 234 235 private native final void setPreviewDisplay(Surface surface); 236 237 /** 238 * Used to get a copy of each preview frame. 239 */ 240 public interface PreviewCallback 241 { 242 /** 243 * The callback that delivers the preview frames. 244 * 245 * @param data The contents of the preview frame in the format defined 246 * by {@link android.graphics.ImageFormat}, which can be queried 247 * with {@link android.hardware.Camera.Parameters#getPreviewFormat()}. 248 * If {@link android.hardware.Camera.Parameters#setPreviewFormat(int)} 249 * is never called, the default will be the YCbCr_420_SP 250 * (NV21) format. 251 * @param camera The Camera service object. 252 */ 253 void onPreviewFrame(byte[] data, Camera camera); 254 }; 255 256 /** 257 * Start drawing preview frames to the surface. 258 */ 259 public native final void startPreview(); 260 261 /** 262 * Stop drawing preview frames to the surface. 263 */ 264 public native final void stopPreview(); 265 266 /** 267 * Return current preview state. 268 * 269 * FIXME: Unhide before release 270 * @hide 271 */ 272 public native final boolean previewEnabled(); 273 274 /** 275 * Can be called at any time to instruct the camera to use a callback for 276 * each preview frame in addition to displaying it. 277 * 278 * @param cb A callback object that receives a copy of each preview frame. 279 * Pass null to stop receiving callbacks at any time. 280 */ 281 public final void setPreviewCallback(PreviewCallback cb) { 282 mPreviewCallback = cb; 283 mOneShot = false; 284 mWithBuffer = false; 285 // Always use one-shot mode. We fake camera preview mode by 286 // doing one-shot preview continuously. 287 setHasPreviewCallback(cb != null, false); 288 } 289 290 /** 291 * Installs a callback to retrieve a single preview frame, after which the 292 * callback is cleared. 293 * 294 * @param cb A callback object that receives a copy of the preview frame. 295 */ 296 public final void setOneShotPreviewCallback(PreviewCallback cb) { 297 mPreviewCallback = cb; 298 mOneShot = true; 299 mWithBuffer = false; 300 setHasPreviewCallback(cb != null, false); 301 } 302 303 private native final void setHasPreviewCallback(boolean installed, boolean manualBuffer); 304 305 /** 306 * Installs a callback which will get called as long as there are buffers in the 307 * preview buffer queue, which minimizes dynamic allocation of preview buffers. 308 * 309 * Apps must call addCallbackBuffer to explicitly register the buffers to use, or no callbacks 310 * will be received. addCallbackBuffer may be safely called before or after 311 * a call to setPreviewCallbackWithBuffer with a non-null callback parameter. 312 * 313 * The buffer queue will be cleared upon any calls to setOneShotPreviewCallback, 314 * setPreviewCallback, or to this method with a null callback parameter. 315 * 316 * @param cb A callback object that receives a copy of the preview frame. A null value will clear the queue. 317 */ 318 public final void setPreviewCallbackWithBuffer(PreviewCallback cb) { 319 mPreviewCallback = cb; 320 mOneShot = false; 321 mWithBuffer = true; 322 setHasPreviewCallback(cb != null, true); 323 } 324 325 /** 326 * Adds a pre-allocated buffer to the preview callback buffer queue. 327 * Applications can add one or more buffers to the queue. When a preview 328 * frame arrives and there is still available buffer, buffer will be filled 329 * and it is removed from the queue. Then preview callback is invoked with 330 * the buffer. If a frame arrives and there is no buffer left, the frame is 331 * discarded. Applications should add the buffers back when they finish the 332 * processing. 333 * 334 * The image format of the callback buffer can be read from {@link 335 * android.hardware.Camera.Parameters#getPreviewFormat()}. bitsPerPixel can 336 * be read from {@link android.graphics.ImageFormat#getBitsPerPixel(int)}. 337 * Preview width and height can be determined from getPreviewSize. 338 * 339 * Alternatively, a buffer from a previous callback may be passed in or used 340 * to determine the size of new preview frame buffers. 341 * 342 * @param callbackBuffer The buffer to register. Size should be width * height * bitsPerPixel / 8. 343 * @see #setPreviewCallbackWithBuffer(PreviewCallback) 344 */ 345 public native final void addCallbackBuffer(byte[] callbackBuffer); 346 347 private class EventHandler extends Handler 348 { 349 private Camera mCamera; 350 351 public EventHandler(Camera c, Looper looper) { 352 super(looper); 353 mCamera = c; 354 } 355 356 @Override 357 public void handleMessage(Message msg) { 358 switch(msg.what) { 359 case CAMERA_MSG_SHUTTER: 360 if (mShutterCallback != null) { 361 mShutterCallback.onShutter(); 362 } 363 return; 364 365 case CAMERA_MSG_RAW_IMAGE: 366 if (mRawImageCallback != null) { 367 mRawImageCallback.onPictureTaken((byte[])msg.obj, mCamera); 368 } 369 return; 370 371 case CAMERA_MSG_COMPRESSED_IMAGE: 372 if (mJpegCallback != null) { 373 mJpegCallback.onPictureTaken((byte[])msg.obj, mCamera); 374 } 375 return; 376 377 case CAMERA_MSG_PREVIEW_FRAME: 378 if (mPreviewCallback != null) { 379 PreviewCallback cb = mPreviewCallback; 380 if (mOneShot) { 381 // Clear the callback variable before the callback 382 // in case the app calls setPreviewCallback from 383 // the callback function 384 mPreviewCallback = null; 385 } else if (!mWithBuffer) { 386 // We're faking the camera preview mode to prevent 387 // the app from being flooded with preview frames. 388 // Set to oneshot mode again. 389 setHasPreviewCallback(true, false); 390 } 391 cb.onPreviewFrame((byte[])msg.obj, mCamera); 392 } 393 return; 394 395 case CAMERA_MSG_POSTVIEW_FRAME: 396 if (mPostviewCallback != null) { 397 mPostviewCallback.onPictureTaken((byte[])msg.obj, mCamera); 398 } 399 return; 400 401 case CAMERA_MSG_FOCUS: 402 if (mAutoFocusCallback != null) { 403 mAutoFocusCallback.onAutoFocus(msg.arg1 == 0 ? false : true, mCamera); 404 } 405 return; 406 407 case CAMERA_MSG_ZOOM: 408 if (mZoomListener != null) { 409 mZoomListener.onZoomChange(msg.arg1, msg.arg2 != 0, mCamera); 410 } 411 return; 412 413 case CAMERA_MSG_ERROR : 414 Log.e(TAG, "Error " + msg.arg1); 415 if (mErrorCallback != null) { 416 mErrorCallback.onError(msg.arg1, mCamera); 417 } 418 return; 419 420 default: 421 Log.e(TAG, "Unknown message type " + msg.what); 422 return; 423 } 424 } 425 } 426 427 private static void postEventFromNative(Object camera_ref, 428 int what, int arg1, int arg2, Object obj) 429 { 430 Camera c = (Camera)((WeakReference)camera_ref).get(); 431 if (c == null) 432 return; 433 434 if (c.mEventHandler != null) { 435 Message m = c.mEventHandler.obtainMessage(what, arg1, arg2, obj); 436 c.mEventHandler.sendMessage(m); 437 } 438 } 439 440 /** 441 * Handles the callback for the camera auto focus. 442 * <p>Devices that do not support auto-focus will receive a "fake" 443 * callback to this interface. If your application needs auto-focus and 444 * should not be installed on devices <em>without</em> auto-focus, you must 445 * declare that your app uses the 446 * {@code android.hardware.camera.autofocus} feature, in the 447 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 448 * manifest element.</p> 449 */ 450 public interface AutoFocusCallback 451 { 452 /** 453 * Callback for the camera auto focus. If the camera does not support 454 * auto-focus and autoFocus is called, onAutoFocus will be called 455 * immediately with success. 456 * 457 * @param success true if focus was successful, false if otherwise 458 * @param camera the Camera service object 459 */ 460 void onAutoFocus(boolean success, Camera camera); 461 }; 462 463 /** 464 * Starts auto-focus function and registers a callback function to run when 465 * camera is focused. Only valid after startPreview() has been called. 466 * Applications should call {@link 467 * android.hardware.Camera.Parameters#getFocusMode()} to determine if this 468 * method should be called. If the camera does not support auto-focus, it is 469 * a no-op and {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} 470 * callback will be called immediately. 471 * <p>If your application should not be installed 472 * on devices without auto-focus, you must declare that your application 473 * uses auto-focus with the 474 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 475 * manifest element.</p> 476 * <p>If the current flash mode is not 477 * {@link android.hardware.Camera.Parameters#FLASH_MODE_OFF}, flash may be 478 * fired during auto-focus depending on the driver.<p> 479 * 480 * @param cb the callback to run 481 */ 482 public final void autoFocus(AutoFocusCallback cb) 483 { 484 mAutoFocusCallback = cb; 485 native_autoFocus(); 486 } 487 private native final void native_autoFocus(); 488 489 /** 490 * Cancels auto-focus function. If the auto-focus is still in progress, 491 * this function will cancel it. Whether the auto-focus is in progress 492 * or not, this function will return the focus position to the default. 493 * If the camera does not support auto-focus, this is a no-op. 494 */ 495 public final void cancelAutoFocus() 496 { 497 mAutoFocusCallback = null; 498 native_cancelAutoFocus(); 499 } 500 private native final void native_cancelAutoFocus(); 501 502 /** 503 * An interface which contains a callback for the shutter closing after taking a picture. 504 */ 505 public interface ShutterCallback 506 { 507 /** 508 * Can be used to play a shutter sound as soon as the image has been captured, but before 509 * the data is available. 510 */ 511 void onShutter(); 512 } 513 514 /** 515 * Handles the callback for when a picture is taken. 516 */ 517 public interface PictureCallback { 518 /** 519 * Callback for when a picture is taken. 520 * 521 * @param data a byte array of the picture data 522 * @param camera the Camera service object 523 */ 524 void onPictureTaken(byte[] data, Camera camera); 525 }; 526 527 /** 528 * Triggers an asynchronous image capture. The camera service will initiate 529 * a series of callbacks to the application as the image capture progresses. 530 * The shutter callback occurs after the image is captured. This can be used 531 * to trigger a sound to let the user know that image has been captured. The 532 * raw callback occurs when the raw image data is available (NOTE: the data 533 * may be null if the hardware does not have enough memory to make a copy). 534 * The jpeg callback occurs when the compressed image is available. If the 535 * application does not need a particular callback, a null can be passed 536 * instead of a callback method. 537 * 538 * This method is only valid after {@link #startPreview()} has been called. 539 * This method will stop the preview. Applications should not call {@link 540 * #stopPreview()} before this. After jpeg callback is received, 541 * applications can call {@link #startPreview()} to restart the preview. 542 * 543 * @param shutter callback after the image is captured, may be null 544 * @param raw callback with raw image data, may be null 545 * @param jpeg callback with jpeg image data, may be null 546 */ 547 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 548 PictureCallback jpeg) { 549 takePicture(shutter, raw, null, jpeg); 550 } 551 private native final void native_takePicture(); 552 553 /** 554 * Triggers an asynchronous image capture. The camera service will initiate 555 * a series of callbacks to the application as the image capture progresses. 556 * The shutter callback occurs after the image is captured. This can be used 557 * to trigger a sound to let the user know that image has been captured. The 558 * raw callback occurs when the raw image data is available (NOTE: the data 559 * may be null if the hardware does not have enough memory to make a copy). 560 * The postview callback occurs when a scaled, fully processed postview 561 * image is available (NOTE: not all hardware supports this). The jpeg 562 * callback occurs when the compressed image is available. If the 563 * application does not need a particular callback, a null can be passed 564 * instead of a callback method. 565 * 566 * This method is only valid after {@link #startPreview()} has been called. 567 * This method will stop the preview. Applications should not call {@link 568 * #stopPreview()} before this. After jpeg callback is received, 569 * applications can call {@link #startPreview()} to restart the preview. 570 * 571 * @param shutter callback after the image is captured, may be null 572 * @param raw callback with raw image data, may be null 573 * @param postview callback with postview image data, may be null 574 * @param jpeg callback with jpeg image data, may be null 575 */ 576 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 577 PictureCallback postview, PictureCallback jpeg) { 578 mShutterCallback = shutter; 579 mRawImageCallback = raw; 580 mPostviewCallback = postview; 581 mJpegCallback = jpeg; 582 native_takePicture(); 583 } 584 585 /** 586 * Zooms to the requested value smoothly. Driver will notify {@link 587 * OnZoomChangeListener} of the zoom value and whether zoom is stopped at 588 * the time. For example, suppose the current zoom is 0 and startSmoothZoom 589 * is called with value 3. Method onZoomChange will be called three times 590 * with zoom value 1, 2, and 3. The applications can call {@link 591 * #stopSmoothZoom} to stop the zoom earlier. The applications should not 592 * call startSmoothZoom again or change the zoom value before zoom stops. If 593 * the passing zoom value equals to the current zoom value, no zoom callback 594 * will be generated. This method is supported if {@link 595 * android.hardware.Camera.Parameters#isSmoothZoomSupported} is true. 596 * 597 * @param value zoom value. The valid range is 0 to {@link 598 * android.hardware.Camera.Parameters#getMaxZoom}. 599 * @throws IllegalArgumentException if the zoom value is invalid. 600 * @throws RuntimeException if the method fails. 601 */ 602 public native final void startSmoothZoom(int value); 603 604 /** 605 * Stops the smooth zoom. The applications should wait for the {@link 606 * OnZoomChangeListener} to know when the zoom is actually stopped. This 607 * method is supported if {@link 608 * android.hardware.Camera.Parameters#isSmoothZoomSupported} is true. 609 * 610 * @throws RuntimeException if the method fails. 611 */ 612 public native final void stopSmoothZoom(); 613 614 /** 615 * Set the display orientation. This affects the preview frames and the 616 * picture displayed after snapshot. This method is useful for portrait 617 * mode applications. 618 * 619 * This does not affect the order of byte array passed in 620 * {@link PreviewCallback#onPreviewFrame}. This method is not allowed to 621 * be called during preview. 622 * 623 * If you want to make the camera image show in the same orientation as 624 * the display, you can use the following code.<p> 625 * <pre> 626 * public static void setCameraDisplayOrientation(Activity activity, 627 * int cameraId, android.hardware.Camera camera) { 628 * android.hardware.Camera.CameraInfo info = 629 * new android.hardware.Camera.CameraInfo(); 630 * android.hardware.Camera.getCameraInfo(cameraId, info); 631 * int rotation = activity.getWindowManager().getDefaultDisplay() 632 * .getRotation(); 633 * int degrees = 0; 634 * switch (rotation) { 635 * case Surface.ROTATION_0: degrees = 0; break; 636 * case Surface.ROTATION_90: degrees = 90; break; 637 * case Surface.ROTATION_180: degrees = 180; break; 638 * case Surface.ROTATION_270: degrees = 270; break; 639 * } 640 * 641 * int result = (info.mOrientation - degrees + 360) % 360; 642 * camera.setDisplayOrientation(result); 643 * } 644 * </pre> 645 * @param degrees the angle that the picture will be rotated clockwise. 646 * Valid values are 0, 90, 180, and 270. The starting 647 * position is 0 (landscape). 648 */ 649 public native final void setDisplayOrientation(int degrees); 650 651 /** 652 * Interface for a callback to be invoked when zoom value changes. 653 */ 654 public interface OnZoomChangeListener 655 { 656 /** 657 * Called when the zoom value has changed. 658 * 659 * @param zoomValue the current zoom value. In smooth zoom mode, camera 660 * calls this for every new zoom value. 661 * @param stopped whether smooth zoom is stopped. If the value is true, 662 * this is the last zoom update for the application. 663 * 664 * @param camera the Camera service object 665 * @see #startSmoothZoom(int) 666 */ 667 void onZoomChange(int zoomValue, boolean stopped, Camera camera); 668 }; 669 670 /** 671 * Registers a listener to be notified when the zoom value is updated by the 672 * camera driver during smooth zoom. 673 * 674 * @param listener the listener to notify 675 * @see #startSmoothZoom(int) 676 */ 677 public final void setZoomChangeListener(OnZoomChangeListener listener) 678 { 679 mZoomListener = listener; 680 } 681 682 // These match the enum in include/ui/Camera.h 683 /** Unspecified camerar error. @see #ErrorCallback */ 684 public static final int CAMERA_ERROR_UNKNOWN = 1; 685 /** Media server died. In this case, the application must release the 686 * Camera object and instantiate a new one. @see #ErrorCallback */ 687 public static final int CAMERA_ERROR_SERVER_DIED = 100; 688 689 /** 690 * Handles the camera error callback. 691 */ 692 public interface ErrorCallback 693 { 694 /** 695 * Callback for camera errors. 696 * @param error error code: 697 * <ul> 698 * <li>{@link #CAMERA_ERROR_UNKNOWN} 699 * <li>{@link #CAMERA_ERROR_SERVER_DIED} 700 * </ul> 701 * @param camera the Camera service object 702 */ 703 void onError(int error, Camera camera); 704 }; 705 706 /** 707 * Registers a callback to be invoked when an error occurs. 708 * @param cb the callback to run 709 */ 710 public final void setErrorCallback(ErrorCallback cb) 711 { 712 mErrorCallback = cb; 713 } 714 715 private native final void native_setParameters(String params); 716 private native final String native_getParameters(); 717 718 /** 719 * Sets the Parameters for pictures from this Camera service. 720 * 721 * @param params the Parameters to use for this Camera service 722 */ 723 public void setParameters(Parameters params) { 724 native_setParameters(params.flatten()); 725 } 726 727 /** 728 * Returns the picture Parameters for this Camera service. 729 */ 730 public Parameters getParameters() { 731 Parameters p = new Parameters(); 732 String s = native_getParameters(); 733 p.unflatten(s); 734 return p; 735 } 736 737 /** 738 * Handles the picture size (dimensions). 739 */ 740 public class Size { 741 /** 742 * Sets the dimensions for pictures. 743 * 744 * @param w the photo width (pixels) 745 * @param h the photo height (pixels) 746 */ 747 public Size(int w, int h) { 748 width = w; 749 height = h; 750 } 751 /** 752 * Compares {@code obj} to this size. 753 * 754 * @param obj the object to compare this size with. 755 * @return {@code true} if the width and height of {@code obj} is the 756 * same as those of this size. {@code false} otherwise. 757 */ 758 @Override 759 public boolean equals(Object obj) { 760 if (!(obj instanceof Size)) { 761 return false; 762 } 763 Size s = (Size) obj; 764 return width == s.width && height == s.height; 765 } 766 @Override 767 public int hashCode() { 768 return width * 32713 + height; 769 } 770 /** width of the picture */ 771 public int width; 772 /** height of the picture */ 773 public int height; 774 }; 775 776 /** 777 * Handles the parameters for pictures created by a Camera service. 778 * 779 * <p>To make camera parameters take effect, applications have to call 780 * Camera.setParameters. For example, after setWhiteBalance is called, white 781 * balance is not changed until Camera.setParameters() is called. 782 * 783 * <p>Different devices may have different camera capabilities, such as 784 * picture size or flash modes. The application should query the camera 785 * capabilities before setting parameters. For example, the application 786 * should call getSupportedColorEffects before calling setEffect. If the 787 * camera does not support color effects, getSupportedColorEffects will 788 * return null. 789 */ 790 public class Parameters { 791 // Parameter keys to communicate with the camera driver. 792 private static final String KEY_PREVIEW_SIZE = "preview-size"; 793 private static final String KEY_PREVIEW_FORMAT = "preview-format"; 794 private static final String KEY_PREVIEW_FRAME_RATE = "preview-frame-rate"; 795 private static final String KEY_PICTURE_SIZE = "picture-size"; 796 private static final String KEY_PICTURE_FORMAT = "picture-format"; 797 private static final String KEY_JPEG_THUMBNAIL_SIZE = "jpeg-thumbnail-size"; 798 private static final String KEY_JPEG_THUMBNAIL_WIDTH = "jpeg-thumbnail-width"; 799 private static final String KEY_JPEG_THUMBNAIL_HEIGHT = "jpeg-thumbnail-height"; 800 private static final String KEY_JPEG_THUMBNAIL_QUALITY = "jpeg-thumbnail-quality"; 801 private static final String KEY_JPEG_QUALITY = "jpeg-quality"; 802 private static final String KEY_ROTATION = "rotation"; 803 private static final String KEY_GPS_LATITUDE = "gps-latitude"; 804 private static final String KEY_GPS_LONGITUDE = "gps-longitude"; 805 private static final String KEY_GPS_ALTITUDE = "gps-altitude"; 806 private static final String KEY_GPS_TIMESTAMP = "gps-timestamp"; 807 private static final String KEY_GPS_PROCESSING_METHOD = "gps-processing-method"; 808 private static final String KEY_WHITE_BALANCE = "whitebalance"; 809 private static final String KEY_EFFECT = "effect"; 810 private static final String KEY_ANTIBANDING = "antibanding"; 811 private static final String KEY_SCENE_MODE = "scene-mode"; 812 private static final String KEY_FLASH_MODE = "flash-mode"; 813 private static final String KEY_FOCUS_MODE = "focus-mode"; 814 private static final String KEY_FOCAL_LENGTH = "focal-length"; 815 private static final String KEY_HORIZONTAL_VIEW_ANGLE = "horizontal-view-angle"; 816 private static final String KEY_VERTICAL_VIEW_ANGLE = "vertical-view-angle"; 817 private static final String KEY_EXPOSURE_COMPENSATION = "exposure-compensation"; 818 private static final String KEY_MAX_EXPOSURE_COMPENSATION = "max-exposure-compensation"; 819 private static final String KEY_MIN_EXPOSURE_COMPENSATION = "min-exposure-compensation"; 820 private static final String KEY_EXPOSURE_COMPENSATION_STEP = "exposure-compensation-step"; 821 private static final String KEY_ZOOM = "zoom"; 822 private static final String KEY_MAX_ZOOM = "max-zoom"; 823 private static final String KEY_ZOOM_RATIOS = "zoom-ratios"; 824 private static final String KEY_ZOOM_SUPPORTED = "zoom-supported"; 825 private static final String KEY_SMOOTH_ZOOM_SUPPORTED = "smooth-zoom-supported"; 826 private static final String KEY_FOCUS_DISTANCES = "focus-distances"; 827 private static final String KEY_METERING_MODE = "metering-mode"; 828 829 // Parameter key suffix for supported values. 830 private static final String SUPPORTED_VALUES_SUFFIX = "-values"; 831 832 private static final String TRUE = "true"; 833 834 // Values for white balance settings. 835 public static final String WHITE_BALANCE_AUTO = "auto"; 836 public static final String WHITE_BALANCE_INCANDESCENT = "incandescent"; 837 public static final String WHITE_BALANCE_FLUORESCENT = "fluorescent"; 838 public static final String WHITE_BALANCE_WARM_FLUORESCENT = "warm-fluorescent"; 839 public static final String WHITE_BALANCE_DAYLIGHT = "daylight"; 840 public static final String WHITE_BALANCE_CLOUDY_DAYLIGHT = "cloudy-daylight"; 841 public static final String WHITE_BALANCE_TWILIGHT = "twilight"; 842 public static final String WHITE_BALANCE_SHADE = "shade"; 843 844 // Values for color effect settings. 845 public static final String EFFECT_NONE = "none"; 846 public static final String EFFECT_MONO = "mono"; 847 public static final String EFFECT_NEGATIVE = "negative"; 848 public static final String EFFECT_SOLARIZE = "solarize"; 849 public static final String EFFECT_SEPIA = "sepia"; 850 public static final String EFFECT_POSTERIZE = "posterize"; 851 public static final String EFFECT_WHITEBOARD = "whiteboard"; 852 public static final String EFFECT_BLACKBOARD = "blackboard"; 853 public static final String EFFECT_AQUA = "aqua"; 854 855 // Values for antibanding settings. 856 public static final String ANTIBANDING_AUTO = "auto"; 857 public static final String ANTIBANDING_50HZ = "50hz"; 858 public static final String ANTIBANDING_60HZ = "60hz"; 859 public static final String ANTIBANDING_OFF = "off"; 860 861 // Values for flash mode settings. 862 /** 863 * Flash will not be fired. 864 */ 865 public static final String FLASH_MODE_OFF = "off"; 866 867 /** 868 * Flash will be fired automatically when required. The flash may be fired 869 * during preview, auto-focus, or snapshot depending on the driver. 870 */ 871 public static final String FLASH_MODE_AUTO = "auto"; 872 873 /** 874 * Flash will always be fired during snapshot. The flash may also be 875 * fired during preview or auto-focus depending on the driver. 876 */ 877 public static final String FLASH_MODE_ON = "on"; 878 879 /** 880 * Flash will be fired in red-eye reduction mode. 881 */ 882 public static final String FLASH_MODE_RED_EYE = "red-eye"; 883 884 /** 885 * Constant emission of light during preview, auto-focus and snapshot. 886 * This can also be used for video recording. 887 */ 888 public static final String FLASH_MODE_TORCH = "torch"; 889 890 /** 891 * Scene mode is off. 892 */ 893 public static final String SCENE_MODE_AUTO = "auto"; 894 895 /** 896 * Take photos of fast moving objects. Same as {@link 897 * #SCENE_MODE_SPORTS}. 898 */ 899 public static final String SCENE_MODE_ACTION = "action"; 900 901 /** 902 * Take people pictures. 903 */ 904 public static final String SCENE_MODE_PORTRAIT = "portrait"; 905 906 /** 907 * Take pictures on distant objects. 908 */ 909 public static final String SCENE_MODE_LANDSCAPE = "landscape"; 910 911 /** 912 * Take photos at night. 913 */ 914 public static final String SCENE_MODE_NIGHT = "night"; 915 916 /** 917 * Take people pictures at night. 918 */ 919 public static final String SCENE_MODE_NIGHT_PORTRAIT = "night-portrait"; 920 921 /** 922 * Take photos in a theater. Flash light is off. 923 */ 924 public static final String SCENE_MODE_THEATRE = "theatre"; 925 926 /** 927 * Take pictures on the beach. 928 */ 929 public static final String SCENE_MODE_BEACH = "beach"; 930 931 /** 932 * Take pictures on the snow. 933 */ 934 public static final String SCENE_MODE_SNOW = "snow"; 935 936 /** 937 * Take sunset photos. 938 */ 939 public static final String SCENE_MODE_SUNSET = "sunset"; 940 941 /** 942 * Avoid blurry pictures (for example, due to hand shake). 943 */ 944 public static final String SCENE_MODE_STEADYPHOTO = "steadyphoto"; 945 946 /** 947 * For shooting firework displays. 948 */ 949 public static final String SCENE_MODE_FIREWORKS = "fireworks"; 950 951 /** 952 * Take photos of fast moving objects. Same as {@link 953 * #SCENE_MODE_ACTION}. 954 */ 955 public static final String SCENE_MODE_SPORTS = "sports"; 956 957 /** 958 * Take indoor low-light shot. 959 */ 960 public static final String SCENE_MODE_PARTY = "party"; 961 962 /** 963 * Capture the naturally warm color of scenes lit by candles. 964 */ 965 public static final String SCENE_MODE_CANDLELIGHT = "candlelight"; 966 967 /** 968 * Applications are looking for a barcode. Camera driver will be 969 * optimized for barcode reading. 970 */ 971 public static final String SCENE_MODE_BARCODE = "barcode"; 972 973 // Values for focus mode settings. 974 /** 975 * Auto-focus mode. 976 */ 977 public static final String FOCUS_MODE_AUTO = "auto"; 978 979 /** 980 * Focus is set at infinity. Applications should not call 981 * {@link #autoFocus(AutoFocusCallback)} in this mode. 982 */ 983 public static final String FOCUS_MODE_INFINITY = "infinity"; 984 public static final String FOCUS_MODE_MACRO = "macro"; 985 986 /** 987 * Focus is fixed. The camera is always in this mode if the focus is not 988 * adjustable. If the camera has auto-focus, this mode can fix the 989 * focus, which is usually at hyperfocal distance. Applications should 990 * not call {@link #autoFocus(AutoFocusCallback)} in this mode. 991 */ 992 public static final String FOCUS_MODE_FIXED = "fixed"; 993 994 /** 995 * Extended depth of field (EDOF). Focusing is done digitally and 996 * continuously. Applications should not call {@link 997 * #autoFocus(AutoFocusCallback)} in this mode. 998 */ 999 public static final String FOCUS_MODE_EDOF = "edof"; 1000 1001 // Indices for focus distance array. 1002 /** 1003 * The array index of near focus distance for use with 1004 * {@link #getFocusDistances(float[])}. 1005 */ 1006 public static final int FOCUS_DISTANCE_NEAR_INDEX = 0; 1007 1008 /** 1009 * The array index of optimal focus distance for use with 1010 * {@link #getFocusDistances(float[])}. 1011 */ 1012 public static final int FOCUS_DISTANCE_OPTIMAL_INDEX = 1; 1013 1014 /** 1015 * The array index of far focus distance for use with 1016 * {@link #getFocusDistances(float[])}. 1017 */ 1018 public static final int FOCUS_DISTANCE_FAR_INDEX = 2; 1019 1020 /** 1021 * Continuous focus mode. The camera continuously tries to focus. This 1022 * is ideal for shooting video or shooting photo of moving object. 1023 * Continuous focus starts when {@link #autoFocus(AutoFocusCallback)} is 1024 * called. Continuous focus stops when {@link #cancelAutoFocus()} is 1025 * called. AutoFocusCallback will be only called once as soon as the 1026 * picture is in focus. 1027 */ 1028 public static final String FOCUS_MODE_CONTINUOUS = "continuous"; 1029 1030 /** 1031 * The camera determines the exposure by giving more weight to the 1032 * central part of the scene. 1033 */ 1034 public static final String METERING_MODE_CENTER_WEIGHTED = "center-weighted"; 1035 1036 /** 1037 * The camera determines the exposure by averaging the entire scene, 1038 * giving no weighting to any particular area. 1039 */ 1040 public static final String METERING_MODE_FRAME_AVERAGE = "frame-average"; 1041 1042 /** 1043 * The camera determines the exposure by a very small area of the scene, 1044 * typically the center. 1045 */ 1046 public static final String METERING_MODE_SPOT = "spot"; 1047 1048 // Formats for setPreviewFormat and setPictureFormat. 1049 private static final String PIXEL_FORMAT_YUV422SP = "yuv422sp"; 1050 private static final String PIXEL_FORMAT_YUV420SP = "yuv420sp"; 1051 private static final String PIXEL_FORMAT_YUV422I = "yuv422i-yuyv"; 1052 private static final String PIXEL_FORMAT_RGB565 = "rgb565"; 1053 private static final String PIXEL_FORMAT_JPEG = "jpeg"; 1054 1055 private HashMap<String, String> mMap; 1056 1057 private Parameters() { 1058 mMap = new HashMap<String, String>(); 1059 } 1060 1061 /** 1062 * Writes the current Parameters to the log. 1063 * @hide 1064 * @deprecated 1065 */ 1066 public void dump() { 1067 Log.e(TAG, "dump: size=" + mMap.size()); 1068 for (String k : mMap.keySet()) { 1069 Log.e(TAG, "dump: " + k + "=" + mMap.get(k)); 1070 } 1071 } 1072 1073 /** 1074 * Creates a single string with all the parameters set in 1075 * this Parameters object. 1076 * <p>The {@link #unflatten(String)} method does the reverse.</p> 1077 * 1078 * @return a String with all values from this Parameters object, in 1079 * semi-colon delimited key-value pairs 1080 */ 1081 public String flatten() { 1082 StringBuilder flattened = new StringBuilder(); 1083 for (String k : mMap.keySet()) { 1084 flattened.append(k); 1085 flattened.append("="); 1086 flattened.append(mMap.get(k)); 1087 flattened.append(";"); 1088 } 1089 // chop off the extra semicolon at the end 1090 flattened.deleteCharAt(flattened.length()-1); 1091 return flattened.toString(); 1092 } 1093 1094 /** 1095 * Takes a flattened string of parameters and adds each one to 1096 * this Parameters object. 1097 * <p>The {@link #flatten()} method does the reverse.</p> 1098 * 1099 * @param flattened a String of parameters (key-value paired) that 1100 * are semi-colon delimited 1101 */ 1102 public void unflatten(String flattened) { 1103 mMap.clear(); 1104 1105 StringTokenizer tokenizer = new StringTokenizer(flattened, ";"); 1106 while (tokenizer.hasMoreElements()) { 1107 String kv = tokenizer.nextToken(); 1108 int pos = kv.indexOf('='); 1109 if (pos == -1) { 1110 continue; 1111 } 1112 String k = kv.substring(0, pos); 1113 String v = kv.substring(pos + 1); 1114 mMap.put(k, v); 1115 } 1116 } 1117 1118 public void remove(String key) { 1119 mMap.remove(key); 1120 } 1121 1122 /** 1123 * Sets a String parameter. 1124 * 1125 * @param key the key name for the parameter 1126 * @param value the String value of the parameter 1127 */ 1128 public void set(String key, String value) { 1129 if (key.indexOf('=') != -1 || key.indexOf(';') != -1) { 1130 Log.e(TAG, "Key \"" + key + "\" contains invalid character (= or ;)"); 1131 return; 1132 } 1133 if (value.indexOf('=') != -1 || value.indexOf(';') != -1) { 1134 Log.e(TAG, "Value \"" + value + "\" contains invalid character (= or ;)"); 1135 return; 1136 } 1137 1138 mMap.put(key, value); 1139 } 1140 1141 /** 1142 * Sets an integer parameter. 1143 * 1144 * @param key the key name for the parameter 1145 * @param value the int value of the parameter 1146 */ 1147 public void set(String key, int value) { 1148 mMap.put(key, Integer.toString(value)); 1149 } 1150 1151 /** 1152 * Returns the value of a String parameter. 1153 * 1154 * @param key the key name for the parameter 1155 * @return the String value of the parameter 1156 */ 1157 public String get(String key) { 1158 return mMap.get(key); 1159 } 1160 1161 /** 1162 * Returns the value of an integer parameter. 1163 * 1164 * @param key the key name for the parameter 1165 * @return the int value of the parameter 1166 */ 1167 public int getInt(String key) { 1168 return Integer.parseInt(mMap.get(key)); 1169 } 1170 1171 /** 1172 * Sets the dimensions for preview pictures. 1173 * 1174 * @param width the width of the pictures, in pixels 1175 * @param height the height of the pictures, in pixels 1176 */ 1177 public void setPreviewSize(int width, int height) { 1178 String v = Integer.toString(width) + "x" + Integer.toString(height); 1179 set(KEY_PREVIEW_SIZE, v); 1180 } 1181 1182 /** 1183 * Returns the dimensions setting for preview pictures. 1184 * 1185 * @return a Size object with the height and width setting 1186 * for the preview picture 1187 */ 1188 public Size getPreviewSize() { 1189 String pair = get(KEY_PREVIEW_SIZE); 1190 return strToSize(pair); 1191 } 1192 1193 /** 1194 * Gets the supported preview sizes. 1195 * 1196 * @return a list of Size object. This method will always return a list 1197 * with at least one element. 1198 */ 1199 public List<Size> getSupportedPreviewSizes() { 1200 String str = get(KEY_PREVIEW_SIZE + SUPPORTED_VALUES_SUFFIX); 1201 return splitSize(str); 1202 } 1203 1204 /** 1205 * Sets the dimensions for EXIF thumbnail in Jpeg picture. If 1206 * applications set both width and height to 0, EXIF will not contain 1207 * thumbnail. 1208 * 1209 * @param width the width of the thumbnail, in pixels 1210 * @param height the height of the thumbnail, in pixels 1211 */ 1212 public void setJpegThumbnailSize(int width, int height) { 1213 set(KEY_JPEG_THUMBNAIL_WIDTH, width); 1214 set(KEY_JPEG_THUMBNAIL_HEIGHT, height); 1215 } 1216 1217 /** 1218 * Returns the dimensions for EXIF thumbnail in Jpeg picture. 1219 * 1220 * @return a Size object with the height and width setting for the EXIF 1221 * thumbnails 1222 */ 1223 public Size getJpegThumbnailSize() { 1224 return new Size(getInt(KEY_JPEG_THUMBNAIL_WIDTH), 1225 getInt(KEY_JPEG_THUMBNAIL_HEIGHT)); 1226 } 1227 1228 /** 1229 * Gets the supported jpeg thumbnail sizes. 1230 * 1231 * @return a list of Size object. This method will always return a list 1232 * with at least two elements. Size 0,0 (no thumbnail) is always 1233 * supported. 1234 */ 1235 public List<Size> getSupportedJpegThumbnailSizes() { 1236 String str = get(KEY_JPEG_THUMBNAIL_SIZE + SUPPORTED_VALUES_SUFFIX); 1237 return splitSize(str); 1238 } 1239 1240 /** 1241 * Sets the quality of the EXIF thumbnail in Jpeg picture. 1242 * 1243 * @param quality the JPEG quality of the EXIF thumbnail. The range is 1 1244 * to 100, with 100 being the best. 1245 */ 1246 public void setJpegThumbnailQuality(int quality) { 1247 set(KEY_JPEG_THUMBNAIL_QUALITY, quality); 1248 } 1249 1250 /** 1251 * Returns the quality setting for the EXIF thumbnail in Jpeg picture. 1252 * 1253 * @return the JPEG quality setting of the EXIF thumbnail. 1254 */ 1255 public int getJpegThumbnailQuality() { 1256 return getInt(KEY_JPEG_THUMBNAIL_QUALITY); 1257 } 1258 1259 /** 1260 * Sets Jpeg quality of captured picture. 1261 * 1262 * @param quality the JPEG quality of captured picture. The range is 1 1263 * to 100, with 100 being the best. 1264 */ 1265 public void setJpegQuality(int quality) { 1266 set(KEY_JPEG_QUALITY, quality); 1267 } 1268 1269 /** 1270 * Returns the quality setting for the JPEG picture. 1271 * 1272 * @return the JPEG picture quality setting. 1273 */ 1274 public int getJpegQuality() { 1275 return getInt(KEY_JPEG_QUALITY); 1276 } 1277 1278 /** 1279 * Sets the rate at which preview frames are received. This is the 1280 * target frame rate. The actual frame rate depends on the driver. 1281 * 1282 * @param fps the frame rate (frames per second) 1283 */ 1284 public void setPreviewFrameRate(int fps) { 1285 set(KEY_PREVIEW_FRAME_RATE, fps); 1286 } 1287 1288 /** 1289 * Returns the setting for the rate at which preview frames are 1290 * received. This is the target frame rate. The actual frame rate 1291 * depends on the driver. 1292 * 1293 * @return the frame rate setting (frames per second) 1294 */ 1295 public int getPreviewFrameRate() { 1296 return getInt(KEY_PREVIEW_FRAME_RATE); 1297 } 1298 1299 /** 1300 * Gets the supported preview frame rates. 1301 * 1302 * @return a list of supported preview frame rates. null if preview 1303 * frame rate setting is not supported. 1304 */ 1305 public List<Integer> getSupportedPreviewFrameRates() { 1306 String str = get(KEY_PREVIEW_FRAME_RATE + SUPPORTED_VALUES_SUFFIX); 1307 return splitInt(str); 1308 } 1309 1310 /** 1311 * Sets the image format for preview pictures. 1312 * <p>If this is never called, the default format will be 1313 * {@link android.graphics.ImageFormat#NV21}, which 1314 * uses the NV21 encoding format.</p> 1315 * 1316 * @param pixel_format the desired preview picture format, defined 1317 * by one of the {@link android.graphics.ImageFormat} constants. 1318 * (E.g., <var>ImageFormat.NV21</var> (default), 1319 * <var>ImageFormat.RGB_565</var>, or 1320 * <var>ImageFormat.JPEG</var>) 1321 * @see android.graphics.ImageFormat 1322 */ 1323 public void setPreviewFormat(int pixel_format) { 1324 String s = cameraFormatForPixelFormat(pixel_format); 1325 if (s == null) { 1326 throw new IllegalArgumentException( 1327 "Invalid pixel_format=" + pixel_format); 1328 } 1329 1330 set(KEY_PREVIEW_FORMAT, s); 1331 } 1332 1333 /** 1334 * Returns the image format for preview frames got from 1335 * {@link PreviewCallback}. 1336 * 1337 * @return the preview format. 1338 * @see android.graphics.ImageFormat 1339 */ 1340 public int getPreviewFormat() { 1341 return pixelFormatForCameraFormat(get(KEY_PREVIEW_FORMAT)); 1342 } 1343 1344 /** 1345 * Gets the supported preview formats. 1346 * 1347 * @return a list of supported preview formats. This method will always 1348 * return a list with at least one element. 1349 * @see android.graphics.ImageFormat 1350 */ 1351 public List<Integer> getSupportedPreviewFormats() { 1352 String str = get(KEY_PREVIEW_FORMAT + SUPPORTED_VALUES_SUFFIX); 1353 ArrayList<Integer> formats = new ArrayList<Integer>(); 1354 for (String s : split(str)) { 1355 int f = pixelFormatForCameraFormat(s); 1356 if (f == ImageFormat.UNKNOWN) continue; 1357 formats.add(f); 1358 } 1359 return formats; 1360 } 1361 1362 /** 1363 * Sets the dimensions for pictures. 1364 * 1365 * @param width the width for pictures, in pixels 1366 * @param height the height for pictures, in pixels 1367 */ 1368 public void setPictureSize(int width, int height) { 1369 String v = Integer.toString(width) + "x" + Integer.toString(height); 1370 set(KEY_PICTURE_SIZE, v); 1371 } 1372 1373 /** 1374 * Returns the dimension setting for pictures. 1375 * 1376 * @return a Size object with the height and width setting 1377 * for pictures 1378 */ 1379 public Size getPictureSize() { 1380 String pair = get(KEY_PICTURE_SIZE); 1381 return strToSize(pair); 1382 } 1383 1384 /** 1385 * Gets the supported picture sizes. 1386 * 1387 * @return a list of supported picture sizes. This method will always 1388 * return a list with at least one element. 1389 */ 1390 public List<Size> getSupportedPictureSizes() { 1391 String str = get(KEY_PICTURE_SIZE + SUPPORTED_VALUES_SUFFIX); 1392 return splitSize(str); 1393 } 1394 1395 /** 1396 * Sets the image format for pictures. 1397 * 1398 * @param pixel_format the desired picture format 1399 * (<var>ImageFormat.NV21</var>, 1400 * <var>ImageFormat.RGB_565</var>, or 1401 * <var>ImageFormat.JPEG</var>) 1402 * @see android.graphics.ImageFormat 1403 */ 1404 public void setPictureFormat(int pixel_format) { 1405 String s = cameraFormatForPixelFormat(pixel_format); 1406 if (s == null) { 1407 throw new IllegalArgumentException( 1408 "Invalid pixel_format=" + pixel_format); 1409 } 1410 1411 set(KEY_PICTURE_FORMAT, s); 1412 } 1413 1414 /** 1415 * Returns the image format for pictures. 1416 * 1417 * @return the picture format 1418 * @see android.graphics.ImageFormat 1419 */ 1420 public int getPictureFormat() { 1421 return pixelFormatForCameraFormat(get(KEY_PICTURE_FORMAT)); 1422 } 1423 1424 /** 1425 * Gets the supported picture formats. 1426 * 1427 * @return supported picture formats. This method will always return a 1428 * list with at least one element. 1429 * @see android.graphics.ImageFormat 1430 */ 1431 public List<Integer> getSupportedPictureFormats() { 1432 String str = get(KEY_PICTURE_FORMAT + SUPPORTED_VALUES_SUFFIX); 1433 ArrayList<Integer> formats = new ArrayList<Integer>(); 1434 for (String s : split(str)) { 1435 int f = pixelFormatForCameraFormat(s); 1436 if (f == ImageFormat.UNKNOWN) continue; 1437 formats.add(f); 1438 } 1439 return formats; 1440 } 1441 1442 private String cameraFormatForPixelFormat(int pixel_format) { 1443 switch(pixel_format) { 1444 case ImageFormat.NV16: return PIXEL_FORMAT_YUV422SP; 1445 case ImageFormat.NV21: return PIXEL_FORMAT_YUV420SP; 1446 case ImageFormat.YUY2: return PIXEL_FORMAT_YUV422I; 1447 case ImageFormat.RGB_565: return PIXEL_FORMAT_RGB565; 1448 case ImageFormat.JPEG: return PIXEL_FORMAT_JPEG; 1449 default: return null; 1450 } 1451 } 1452 1453 private int pixelFormatForCameraFormat(String format) { 1454 if (format == null) 1455 return ImageFormat.UNKNOWN; 1456 1457 if (format.equals(PIXEL_FORMAT_YUV422SP)) 1458 return ImageFormat.NV16; 1459 1460 if (format.equals(PIXEL_FORMAT_YUV420SP)) 1461 return ImageFormat.NV21; 1462 1463 if (format.equals(PIXEL_FORMAT_YUV422I)) 1464 return ImageFormat.YUY2; 1465 1466 if (format.equals(PIXEL_FORMAT_RGB565)) 1467 return ImageFormat.RGB_565; 1468 1469 if (format.equals(PIXEL_FORMAT_JPEG)) 1470 return ImageFormat.JPEG; 1471 1472 return ImageFormat.UNKNOWN; 1473 } 1474 1475 /** 1476 * Sets the orientation of the device in degrees. For example, suppose 1477 * the natural position of the device is landscape. If the user takes a 1478 * picture in landscape mode in 2048x1536 resolution, the rotation 1479 * should be set to 0. If the user rotates the phone 90 degrees 1480 * clockwise, the rotation should be set to 90. Applications can use 1481 * {@link android.view.OrientationEventListener} to set this parameter. 1482 * 1483 * The camera driver may set orientation in the EXIF header without 1484 * rotating the picture. Or the driver may rotate the picture and 1485 * the EXIF thumbnail. If the Jpeg picture is rotated, the orientation 1486 * in the EXIF header will be missing or 1 (row #0 is top and column #0 1487 * is left side). 1488 * 1489 * @param rotation The orientation of the device in degrees. Rotation 1490 * can only be 0, 90, 180 or 270. 1491 * @throws IllegalArgumentException if rotation value is invalid. 1492 * @see android.view.OrientationEventListener 1493 */ 1494 public void setRotation(int rotation) { 1495 if (rotation == 0 || rotation == 90 || rotation == 180 1496 || rotation == 270) { 1497 set(KEY_ROTATION, Integer.toString(rotation)); 1498 } else { 1499 throw new IllegalArgumentException( 1500 "Invalid rotation=" + rotation); 1501 } 1502 } 1503 1504 /** 1505 * Sets GPS latitude coordinate. This will be stored in JPEG EXIF 1506 * header. 1507 * 1508 * @param latitude GPS latitude coordinate. 1509 */ 1510 public void setGpsLatitude(double latitude) { 1511 set(KEY_GPS_LATITUDE, Double.toString(latitude)); 1512 } 1513 1514 /** 1515 * Sets GPS longitude coordinate. This will be stored in JPEG EXIF 1516 * header. 1517 * 1518 * @param longitude GPS longitude coordinate. 1519 */ 1520 public void setGpsLongitude(double longitude) { 1521 set(KEY_GPS_LONGITUDE, Double.toString(longitude)); 1522 } 1523 1524 /** 1525 * Sets GPS altitude. This will be stored in JPEG EXIF header. 1526 * 1527 * @param altitude GPS altitude in meters. 1528 */ 1529 public void setGpsAltitude(double altitude) { 1530 set(KEY_GPS_ALTITUDE, Double.toString(altitude)); 1531 } 1532 1533 /** 1534 * Sets GPS timestamp. This will be stored in JPEG EXIF header. 1535 * 1536 * @param timestamp GPS timestamp (UTC in seconds since January 1, 1537 * 1970). 1538 */ 1539 public void setGpsTimestamp(long timestamp) { 1540 set(KEY_GPS_TIMESTAMP, Long.toString(timestamp)); 1541 } 1542 1543 /** 1544 * Sets GPS processing method. It will store up to 32 characters 1545 * in JPEG EXIF header. 1546 * 1547 * @param processing_method The processing method to get this location. 1548 */ 1549 public void setGpsProcessingMethod(String processing_method) { 1550 set(KEY_GPS_PROCESSING_METHOD, processing_method); 1551 } 1552 1553 /** 1554 * Removes GPS latitude, longitude, altitude, and timestamp from the 1555 * parameters. 1556 */ 1557 public void removeGpsData() { 1558 remove(KEY_GPS_LATITUDE); 1559 remove(KEY_GPS_LONGITUDE); 1560 remove(KEY_GPS_ALTITUDE); 1561 remove(KEY_GPS_TIMESTAMP); 1562 remove(KEY_GPS_PROCESSING_METHOD); 1563 } 1564 1565 /** 1566 * Gets the current white balance setting. 1567 * 1568 * @return current white balance. null if white balance setting is not 1569 * supported. 1570 * @see #WHITE_BALANCE_AUTO 1571 * @see #WHITE_BALANCE_INCANDESCENT 1572 * @see #WHITE_BALANCE_FLUORESCENT 1573 * @see #WHITE_BALANCE_WARM_FLUORESCENT 1574 * @see #WHITE_BALANCE_DAYLIGHT 1575 * @see #WHITE_BALANCE_CLOUDY_DAYLIGHT 1576 * @see #WHITE_BALANCE_TWILIGHT 1577 * @see #WHITE_BALANCE_SHADE 1578 * 1579 */ 1580 public String getWhiteBalance() { 1581 return get(KEY_WHITE_BALANCE); 1582 } 1583 1584 /** 1585 * Sets the white balance. 1586 * 1587 * @param value new white balance. 1588 * @see #getWhiteBalance() 1589 */ 1590 public void setWhiteBalance(String value) { 1591 set(KEY_WHITE_BALANCE, value); 1592 } 1593 1594 /** 1595 * Gets the supported white balance. 1596 * 1597 * @return a list of supported white balance. null if white balance 1598 * setting is not supported. 1599 * @see #getWhiteBalance() 1600 */ 1601 public List<String> getSupportedWhiteBalance() { 1602 String str = get(KEY_WHITE_BALANCE + SUPPORTED_VALUES_SUFFIX); 1603 return split(str); 1604 } 1605 1606 /** 1607 * Gets the current color effect setting. 1608 * 1609 * @return current color effect. null if color effect 1610 * setting is not supported. 1611 * @see #EFFECT_NONE 1612 * @see #EFFECT_MONO 1613 * @see #EFFECT_NEGATIVE 1614 * @see #EFFECT_SOLARIZE 1615 * @see #EFFECT_SEPIA 1616 * @see #EFFECT_POSTERIZE 1617 * @see #EFFECT_WHITEBOARD 1618 * @see #EFFECT_BLACKBOARD 1619 * @see #EFFECT_AQUA 1620 */ 1621 public String getColorEffect() { 1622 return get(KEY_EFFECT); 1623 } 1624 1625 /** 1626 * Sets the current color effect setting. 1627 * 1628 * @param value new color effect. 1629 * @see #getColorEffect() 1630 */ 1631 public void setColorEffect(String value) { 1632 set(KEY_EFFECT, value); 1633 } 1634 1635 /** 1636 * Gets the supported color effects. 1637 * 1638 * @return a list of supported color effects. null if color effect 1639 * setting is not supported. 1640 * @see #getColorEffect() 1641 */ 1642 public List<String> getSupportedColorEffects() { 1643 String str = get(KEY_EFFECT + SUPPORTED_VALUES_SUFFIX); 1644 return split(str); 1645 } 1646 1647 1648 /** 1649 * Gets the current antibanding setting. 1650 * 1651 * @return current antibanding. null if antibanding setting is not 1652 * supported. 1653 * @see #ANTIBANDING_AUTO 1654 * @see #ANTIBANDING_50HZ 1655 * @see #ANTIBANDING_60HZ 1656 * @see #ANTIBANDING_OFF 1657 */ 1658 public String getAntibanding() { 1659 return get(KEY_ANTIBANDING); 1660 } 1661 1662 /** 1663 * Sets the antibanding. 1664 * 1665 * @param antibanding new antibanding value. 1666 * @see #getAntibanding() 1667 */ 1668 public void setAntibanding(String antibanding) { 1669 set(KEY_ANTIBANDING, antibanding); 1670 } 1671 1672 /** 1673 * Gets the supported antibanding values. 1674 * 1675 * @return a list of supported antibanding values. null if antibanding 1676 * setting is not supported. 1677 * @see #getAntibanding() 1678 */ 1679 public List<String> getSupportedAntibanding() { 1680 String str = get(KEY_ANTIBANDING + SUPPORTED_VALUES_SUFFIX); 1681 return split(str); 1682 } 1683 1684 /** 1685 * Gets the current scene mode setting. 1686 * 1687 * @return one of SCENE_MODE_XXX string constant. null if scene mode 1688 * setting is not supported. 1689 * @see #SCENE_MODE_AUTO 1690 * @see #SCENE_MODE_ACTION 1691 * @see #SCENE_MODE_PORTRAIT 1692 * @see #SCENE_MODE_LANDSCAPE 1693 * @see #SCENE_MODE_NIGHT 1694 * @see #SCENE_MODE_NIGHT_PORTRAIT 1695 * @see #SCENE_MODE_THEATRE 1696 * @see #SCENE_MODE_BEACH 1697 * @see #SCENE_MODE_SNOW 1698 * @see #SCENE_MODE_SUNSET 1699 * @see #SCENE_MODE_STEADYPHOTO 1700 * @see #SCENE_MODE_FIREWORKS 1701 * @see #SCENE_MODE_SPORTS 1702 * @see #SCENE_MODE_PARTY 1703 * @see #SCENE_MODE_CANDLELIGHT 1704 */ 1705 public String getSceneMode() { 1706 return get(KEY_SCENE_MODE); 1707 } 1708 1709 /** 1710 * Sets the scene mode. Changing scene mode may override other 1711 * parameters (such as flash mode, focus mode, white balance). For 1712 * example, suppose originally flash mode is on and supported flash 1713 * modes are on/off. In night scene mode, both flash mode and supported 1714 * flash mode may be changed to off. After setting scene mode, 1715 * applications should call getParameters to know if some parameters are 1716 * changed. 1717 * 1718 * @param value scene mode. 1719 * @see #getSceneMode() 1720 */ 1721 public void setSceneMode(String value) { 1722 set(KEY_SCENE_MODE, value); 1723 } 1724 1725 /** 1726 * Gets the supported scene modes. 1727 * 1728 * @return a list of supported scene modes. null if scene mode setting 1729 * is not supported. 1730 * @see #getSceneMode() 1731 */ 1732 public List<String> getSupportedSceneModes() { 1733 String str = get(KEY_SCENE_MODE + SUPPORTED_VALUES_SUFFIX); 1734 return split(str); 1735 } 1736 1737 /** 1738 * Gets the current flash mode setting. 1739 * 1740 * @return current flash mode. null if flash mode setting is not 1741 * supported. 1742 * @see #FLASH_MODE_OFF 1743 * @see #FLASH_MODE_AUTO 1744 * @see #FLASH_MODE_ON 1745 * @see #FLASH_MODE_RED_EYE 1746 * @see #FLASH_MODE_TORCH 1747 */ 1748 public String getFlashMode() { 1749 return get(KEY_FLASH_MODE); 1750 } 1751 1752 /** 1753 * Sets the flash mode. 1754 * 1755 * @param value flash mode. 1756 * @see #getFlashMode() 1757 */ 1758 public void setFlashMode(String value) { 1759 set(KEY_FLASH_MODE, value); 1760 } 1761 1762 /** 1763 * Gets the supported flash modes. 1764 * 1765 * @return a list of supported flash modes. null if flash mode setting 1766 * is not supported. 1767 * @see #getFlashMode() 1768 */ 1769 public List<String> getSupportedFlashModes() { 1770 String str = get(KEY_FLASH_MODE + SUPPORTED_VALUES_SUFFIX); 1771 return split(str); 1772 } 1773 1774 /** 1775 * Gets the current focus mode setting. 1776 * 1777 * @return current focus mode. If the camera does not support 1778 * auto-focus, this should return {@link #FOCUS_MODE_FIXED}. If 1779 * the focus mode is not FOCUS_MODE_FIXED or {@link 1780 * #FOCUS_MODE_INFINITY}, applications should call {@link 1781 * #autoFocus(AutoFocusCallback)} to start the focus. 1782 * @see #FOCUS_MODE_AUTO 1783 * @see #FOCUS_MODE_INFINITY 1784 * @see #FOCUS_MODE_MACRO 1785 * @see #FOCUS_MODE_FIXED 1786 */ 1787 public String getFocusMode() { 1788 return get(KEY_FOCUS_MODE); 1789 } 1790 1791 /** 1792 * Sets the focus mode. 1793 * 1794 * @param value focus mode. 1795 * @see #getFocusMode() 1796 */ 1797 public void setFocusMode(String value) { 1798 set(KEY_FOCUS_MODE, value); 1799 } 1800 1801 /** 1802 * Gets the supported focus modes. 1803 * 1804 * @return a list of supported focus modes. This method will always 1805 * return a list with at least one element. 1806 * @see #getFocusMode() 1807 */ 1808 public List<String> getSupportedFocusModes() { 1809 String str = get(KEY_FOCUS_MODE + SUPPORTED_VALUES_SUFFIX); 1810 return split(str); 1811 } 1812 1813 /** 1814 * Gets the focal length (in millimeter) of the camera. 1815 * 1816 * @return the focal length. This method will always return a valid 1817 * value. 1818 */ 1819 public float getFocalLength() { 1820 return Float.parseFloat(get(KEY_FOCAL_LENGTH)); 1821 } 1822 1823 /** 1824 * Gets the horizontal angle of view in degrees. 1825 * 1826 * @return horizontal angle of view. This method will always return a 1827 * valid value. 1828 */ 1829 public float getHorizontalViewAngle() { 1830 return Float.parseFloat(get(KEY_HORIZONTAL_VIEW_ANGLE)); 1831 } 1832 1833 /** 1834 * Gets the vertical angle of view in degrees. 1835 * 1836 * @return vertical angle of view. This method will always return a 1837 * valid value. 1838 */ 1839 public float getVerticalViewAngle() { 1840 return Float.parseFloat(get(KEY_VERTICAL_VIEW_ANGLE)); 1841 } 1842 1843 /** 1844 * Gets the current exposure compensation index. 1845 * 1846 * @return current exposure compensation index. The range is {@link 1847 * #getMinExposureCompensation} to {@link 1848 * #getMaxExposureCompensation}. 0 means exposure is not 1849 * adjusted. 1850 */ 1851 public int getExposureCompensation() { 1852 return getInt(KEY_EXPOSURE_COMPENSATION, 0); 1853 } 1854 1855 /** 1856 * Sets the exposure compensation index. 1857 * 1858 * @param value exposure compensation index. The valid value range is 1859 * from {@link #getMinExposureCompensation} (inclusive) to {@link 1860 * #getMaxExposureCompensation} (inclusive). 0 means exposure is 1861 * not adjusted. Application should call 1862 * getMinExposureCompensation and getMaxExposureCompensation to 1863 * know if exposure compensation is supported. 1864 */ 1865 public void setExposureCompensation(int value) { 1866 set(KEY_EXPOSURE_COMPENSATION, value); 1867 } 1868 1869 /** 1870 * Gets the maximum exposure compensation index. 1871 * 1872 * @return maximum exposure compensation index (>=0). If both this 1873 * method and {@link #getMinExposureCompensation} return 0, 1874 * exposure compensation is not supported. 1875 */ 1876 public int getMaxExposureCompensation() { 1877 return getInt(KEY_MAX_EXPOSURE_COMPENSATION, 0); 1878 } 1879 1880 /** 1881 * Gets the minimum exposure compensation index. 1882 * 1883 * @return minimum exposure compensation index (<=0). If both this 1884 * method and {@link #getMaxExposureCompensation} return 0, 1885 * exposure compensation is not supported. 1886 */ 1887 public int getMinExposureCompensation() { 1888 return getInt(KEY_MIN_EXPOSURE_COMPENSATION, 0); 1889 } 1890 1891 /** 1892 * Gets the exposure compensation step. 1893 * 1894 * @return exposure compensation step. Applications can get EV by 1895 * multiplying the exposure compensation index and step. Ex: if 1896 * exposure compensation index is -6 and step is 0.333333333, EV 1897 * is -2. 1898 */ 1899 public float getExposureCompensationStep() { 1900 return getFloat(KEY_EXPOSURE_COMPENSATION_STEP, 0); 1901 } 1902 1903 /** 1904 * Gets current zoom value. This also works when smooth zoom is in 1905 * progress. Applications should check {@link #isZoomSupported} before 1906 * using this method. 1907 * 1908 * @return the current zoom value. The range is 0 to {@link 1909 * #getMaxZoom}. 0 means the camera is not zoomed. 1910 */ 1911 public int getZoom() { 1912 return getInt(KEY_ZOOM, 0); 1913 } 1914 1915 /** 1916 * Sets current zoom value. If the camera is zoomed (value > 0), the 1917 * actual picture size may be smaller than picture size setting. 1918 * Applications can check the actual picture size after picture is 1919 * returned from {@link PictureCallback}. The preview size remains the 1920 * same in zoom. Applications should check {@link #isZoomSupported} 1921 * before using this method. 1922 * 1923 * @param value zoom value. The valid range is 0 to {@link #getMaxZoom}. 1924 */ 1925 public void setZoom(int value) { 1926 set(KEY_ZOOM, value); 1927 } 1928 1929 /** 1930 * Returns true if zoom is supported. Applications should call this 1931 * before using other zoom methods. 1932 * 1933 * @return true if zoom is supported. 1934 */ 1935 public boolean isZoomSupported() { 1936 String str = get(KEY_ZOOM_SUPPORTED); 1937 return TRUE.equals(str); 1938 } 1939 1940 /** 1941 * Gets the maximum zoom value allowed for snapshot. This is the maximum 1942 * value that applications can set to {@link #setZoom(int)}. 1943 * Applications should call {@link #isZoomSupported} before using this 1944 * method. This value may change in different preview size. Applications 1945 * should call this again after setting preview size. 1946 * 1947 * @return the maximum zoom value supported by the camera. 1948 */ 1949 public int getMaxZoom() { 1950 return getInt(KEY_MAX_ZOOM, 0); 1951 } 1952 1953 /** 1954 * Gets the zoom ratios of all zoom values. Applications should check 1955 * {@link #isZoomSupported} before using this method. 1956 * 1957 * @return the zoom ratios in 1/100 increments. Ex: a zoom of 3.2x is 1958 * returned as 320. The number of elements is {@link 1959 * #getMaxZoom} + 1. The list is sorted from small to large. The 1960 * first element is always 100. The last element is the zoom 1961 * ratio of the maximum zoom value. 1962 */ 1963 public List<Integer> getZoomRatios() { 1964 return splitInt(get(KEY_ZOOM_RATIOS)); 1965 } 1966 1967 /** 1968 * Returns true if smooth zoom is supported. Applications should call 1969 * this before using other smooth zoom methods. 1970 * 1971 * @return true if smooth zoom is supported. 1972 */ 1973 public boolean isSmoothZoomSupported() { 1974 String str = get(KEY_SMOOTH_ZOOM_SUPPORTED); 1975 return TRUE.equals(str); 1976 } 1977 1978 /** 1979 * Gets the distances from the camera to where an object appears to be 1980 * in focus. The object is sharpest at the optimal focus distance. The 1981 * depth of field is the far focus distance minus near focus distance. 1982 * 1983 * Focus distances may change after calling {@link 1984 * #autoFocus(AutoFocusCallback)}, {@link #cancelAutoFocus}, or {@link 1985 * #startPreview()}. Applications can call {@link #getParameters()} 1986 * and this method anytime to get the latest focus distances. If the 1987 * focus mode is FOCUS_MODE_CONTINUOUS and autofocus has started, focus 1988 * distances may change from time to time. 1989 * 1990 * Far focus distance >= optimal focus distance >= near focus distance. 1991 * If the focus distance is infinity, the value will be 1992 * Float.POSITIVE_INFINITY. 1993 * 1994 * @param output focus distances in meters. output must be a float 1995 * array with three elements. Near focus distance, optimal focus 1996 * distance, and far focus distance will be filled in the array. 1997 * @see #FOCUS_DISTANCE_NEAR_INDEX 1998 * @see #FOCUS_DISTANCE_OPTIMAL_INDEX 1999 * @see #FOCUS_DISTANCE_FAR_INDEX 2000 */ 2001 public void getFocusDistances(float[] output) { 2002 if (output == null || output.length != 3) { 2003 throw new IllegalArgumentException( 2004 "output must be an float array with three elements."); 2005 } 2006 List<Float> distances = splitFloat(get(KEY_FOCUS_DISTANCES)); 2007 output[0] = distances.get(0); 2008 output[1] = distances.get(1); 2009 output[2] = distances.get(2); 2010 } 2011 2012 /** 2013 * Gets the supported metering modes. 2014 * 2015 * @return a list of supported metering modes. null if metering mode 2016 * setting is not supported. 2017 * @see #getMeteringMode() 2018 */ 2019 public List<String> getSupportedMeteringModes() { 2020 String str = get(KEY_METERING_MODE + SUPPORTED_VALUES_SUFFIX); 2021 return split(str); 2022 } 2023 2024 /** 2025 * Gets the current metering mode, which affects how camera determines 2026 * exposure. 2027 * 2028 * @return current metering mode. If the camera does not support 2029 * metering setting, this should return null. 2030 * @see #METERING_MODE_CENTER_WEIGHTED 2031 * @see #METERING_MODE_FRAME_AVERAGE 2032 * @see #METERING_MODE_SPOT 2033 */ 2034 public String getMeteringMode() { 2035 return get(KEY_METERING_MODE); 2036 } 2037 2038 /** 2039 * Sets the metering mode. 2040 * 2041 * @param value metering mode. 2042 * @see #getMeteringMode() 2043 */ 2044 public void setMeteringMode(String value) { 2045 set(KEY_METERING_MODE, value); 2046 } 2047 2048 // Splits a comma delimited string to an ArrayList of String. 2049 // Return null if the passing string is null or the size is 0. 2050 private ArrayList<String> split(String str) { 2051 if (str == null) return null; 2052 2053 // Use StringTokenizer because it is faster than split. 2054 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2055 ArrayList<String> substrings = new ArrayList<String>(); 2056 while (tokenizer.hasMoreElements()) { 2057 substrings.add(tokenizer.nextToken()); 2058 } 2059 return substrings; 2060 } 2061 2062 // Splits a comma delimited string to an ArrayList of Integer. 2063 // Return null if the passing string is null or the size is 0. 2064 private ArrayList<Integer> splitInt(String str) { 2065 if (str == null) return null; 2066 2067 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2068 ArrayList<Integer> substrings = new ArrayList<Integer>(); 2069 while (tokenizer.hasMoreElements()) { 2070 String token = tokenizer.nextToken(); 2071 substrings.add(Integer.parseInt(token)); 2072 } 2073 if (substrings.size() == 0) return null; 2074 return substrings; 2075 } 2076 2077 // Splits a comma delimited string to an ArrayList of Float. 2078 // Return null if the passing string is null or the size is 0. 2079 private ArrayList<Float> splitFloat(String str) { 2080 if (str == null) return null; 2081 2082 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2083 ArrayList<Float> substrings = new ArrayList<Float>(); 2084 while (tokenizer.hasMoreElements()) { 2085 String token = tokenizer.nextToken(); 2086 substrings.add(Float.parseFloat(token)); 2087 } 2088 if (substrings.size() == 0) return null; 2089 return substrings; 2090 } 2091 2092 // Returns the value of a float parameter. 2093 private float getFloat(String key, float defaultValue) { 2094 try { 2095 return Float.parseFloat(mMap.get(key)); 2096 } catch (NumberFormatException ex) { 2097 return defaultValue; 2098 } 2099 } 2100 2101 // Returns the value of a integer parameter. 2102 private int getInt(String key, int defaultValue) { 2103 try { 2104 return Integer.parseInt(mMap.get(key)); 2105 } catch (NumberFormatException ex) { 2106 return defaultValue; 2107 } 2108 } 2109 2110 // Splits a comma delimited string to an ArrayList of Size. 2111 // Return null if the passing string is null or the size is 0. 2112 private ArrayList<Size> splitSize(String str) { 2113 if (str == null) return null; 2114 2115 StringTokenizer tokenizer = new StringTokenizer(str, ","); 2116 ArrayList<Size> sizeList = new ArrayList<Size>(); 2117 while (tokenizer.hasMoreElements()) { 2118 Size size = strToSize(tokenizer.nextToken()); 2119 if (size != null) sizeList.add(size); 2120 } 2121 if (sizeList.size() == 0) return null; 2122 return sizeList; 2123 } 2124 2125 // Parses a string (ex: "480x320") to Size object. 2126 // Return null if the passing string is null. 2127 private Size strToSize(String str) { 2128 if (str == null) return null; 2129 2130 int pos = str.indexOf('x'); 2131 if (pos != -1) { 2132 String width = str.substring(0, pos); 2133 String height = str.substring(pos + 1); 2134 return new Size(Integer.parseInt(width), 2135 Integer.parseInt(height)); 2136 } 2137 Log.e(TAG, "Invalid size parameter string=" + str); 2138 return null; 2139 } 2140 }; 2141} 2142