Camera.java revision e6bea600fe5600017a4824adb14752a5b915d164
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.PixelFormat; 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/ui/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 ZoomCallback mZoomCallback; 82 private ErrorCallback mErrorCallback; 83 private boolean mOneShot; 84 85 /** 86 * Returns a new Camera object. 87 */ 88 public static Camera open() { 89 return new Camera(); 90 } 91 92 Camera() { 93 mShutterCallback = null; 94 mRawImageCallback = null; 95 mJpegCallback = null; 96 mPreviewCallback = null; 97 mPostviewCallback = null; 98 mZoomCallback = null; 99 100 Looper looper; 101 if ((looper = Looper.myLooper()) != null) { 102 mEventHandler = new EventHandler(this, looper); 103 } else if ((looper = Looper.getMainLooper()) != null) { 104 mEventHandler = new EventHandler(this, looper); 105 } else { 106 mEventHandler = null; 107 } 108 109 native_setup(new WeakReference<Camera>(this)); 110 } 111 112 protected void finalize() { 113 native_release(); 114 } 115 116 private native final void native_setup(Object camera_this); 117 private native final void native_release(); 118 119 120 /** 121 * Disconnects and releases the Camera object resources. 122 * <p>It is recommended that you call this as soon as you're done with the 123 * Camera object.</p> 124 */ 125 public final void release() { 126 native_release(); 127 } 128 129 /** 130 * Reconnect to the camera after passing it to MediaRecorder. To save 131 * setup/teardown time, a client of Camera can pass an initialized Camera 132 * object to a MediaRecorder to use for video recording. Once the 133 * MediaRecorder is done with the Camera, this method can be used to 134 * re-establish a connection with the camera hardware. NOTE: The Camera 135 * object must first be unlocked by the process that owns it before it 136 * can be connected to another process. 137 * 138 * @throws IOException if the method fails. 139 * 140 * @hide 141 */ 142 public native final void reconnect() throws IOException; 143 144 /** 145 * Lock the camera to prevent other processes from accessing it. To save 146 * setup/teardown time, a client of Camera can pass an initialized Camera 147 * object to another process. This method is used to re-lock the Camera 148 * object prevent other processes from accessing it. By default, the 149 * Camera object is locked. Locking it again from the same process will 150 * have no effect. Attempting to lock it from another process if it has 151 * not been unlocked will fail. 152 * 153 * @throws RuntimeException if the method fails. 154 */ 155 public native final void lock(); 156 157 /** 158 * Unlock the camera to allow another process to access it. To save 159 * setup/teardown time, a client of Camera can pass an initialized Camera 160 * object to another process. This method is used to unlock the Camera 161 * object before handing off the Camera object to the other process. 162 * 163 * @throws RuntimeException if the method fails. 164 */ 165 public native final void unlock(); 166 167 /** 168 * Sets the SurfaceHolder to be used for a picture preview. If the surface 169 * changed since the last call, the screen will blank. Nothing happens 170 * if the same surface is re-set. 171 * 172 * @param holder the SurfaceHolder upon which to place the picture preview 173 * @throws IOException if the method fails. 174 */ 175 public final void setPreviewDisplay(SurfaceHolder holder) throws IOException { 176 if (holder != null) { 177 setPreviewDisplay(holder.getSurface()); 178 } else { 179 setPreviewDisplay((Surface)null); 180 } 181 } 182 183 private native final void setPreviewDisplay(Surface surface); 184 185 /** 186 * Used to get a copy of each preview frame. 187 */ 188 public interface PreviewCallback 189 { 190 /** 191 * The callback that delivers the preview frames. 192 * 193 * @param data The contents of the preview frame in the format defined 194 * by {@link android.graphics.PixelFormat}, which can be queried 195 * with {@link android.hardware.Camera.Parameters#getPreviewFormat()}. 196 * If {@link android.hardware.Camera.Parameters#setPreviewFormat(int)} 197 * is never called, the default will be the YCbCr_420_SP 198 * (NV21) format. 199 * @param camera The Camera service object. 200 */ 201 void onPreviewFrame(byte[] data, Camera camera); 202 }; 203 204 /** 205 * Start drawing preview frames to the surface. 206 */ 207 public native final void startPreview(); 208 209 /** 210 * Stop drawing preview frames to the surface. 211 */ 212 public native final void stopPreview(); 213 214 /** 215 * Return current preview state. 216 * 217 * FIXME: Unhide before release 218 * @hide 219 */ 220 public native final boolean previewEnabled(); 221 222 /** 223 * Can be called at any time to instruct the camera to use a callback for 224 * each preview frame in addition to displaying it. 225 * 226 * @param cb A callback object that receives a copy of each preview frame. 227 * Pass null to stop receiving callbacks at any time. 228 */ 229 public final void setPreviewCallback(PreviewCallback cb) { 230 mPreviewCallback = cb; 231 mOneShot = false; 232 setHasPreviewCallback(cb != null, false); 233 } 234 235 /** 236 * Installs a callback to retrieve a single preview frame, after which the 237 * callback is cleared. 238 * 239 * @param cb A callback object that receives a copy of the preview frame. 240 */ 241 public final void setOneShotPreviewCallback(PreviewCallback cb) { 242 if (cb != null) { 243 mPreviewCallback = cb; 244 mOneShot = true; 245 setHasPreviewCallback(true, true); 246 } 247 } 248 249 private native final void setHasPreviewCallback(boolean installed, boolean oneshot); 250 251 private class EventHandler extends Handler 252 { 253 private Camera mCamera; 254 255 public EventHandler(Camera c, Looper looper) { 256 super(looper); 257 mCamera = c; 258 } 259 260 @Override 261 public void handleMessage(Message msg) { 262 switch(msg.what) { 263 case CAMERA_MSG_SHUTTER: 264 if (mShutterCallback != null) { 265 mShutterCallback.onShutter(); 266 } 267 return; 268 269 case CAMERA_MSG_RAW_IMAGE: 270 if (mRawImageCallback != null) { 271 mRawImageCallback.onPictureTaken((byte[])msg.obj, mCamera); 272 } 273 return; 274 275 case CAMERA_MSG_COMPRESSED_IMAGE: 276 if (mJpegCallback != null) { 277 mJpegCallback.onPictureTaken((byte[])msg.obj, mCamera); 278 } 279 return; 280 281 case CAMERA_MSG_PREVIEW_FRAME: 282 if (mPreviewCallback != null) { 283 mPreviewCallback.onPreviewFrame((byte[])msg.obj, mCamera); 284 if (mOneShot) { 285 mPreviewCallback = null; 286 } 287 } 288 return; 289 290 case CAMERA_MSG_POSTVIEW_FRAME: 291 if (mPostviewCallback != null) { 292 mPostviewCallback.onPictureTaken((byte[])msg.obj, mCamera); 293 } 294 return; 295 296 case CAMERA_MSG_FOCUS: 297 if (mAutoFocusCallback != null) { 298 mAutoFocusCallback.onAutoFocus(msg.arg1 == 0 ? false : true, mCamera); 299 } 300 return; 301 302 case CAMERA_MSG_ZOOM: 303 if (mZoomCallback != null) { 304 mZoomCallback.onZoomUpdate(msg.arg1, mCamera); 305 } 306 return; 307 308 case CAMERA_MSG_ERROR : 309 Log.e(TAG, "Error " + msg.arg1); 310 if (mErrorCallback != null) { 311 mErrorCallback.onError(msg.arg1, mCamera); 312 } 313 return; 314 315 default: 316 Log.e(TAG, "Unknown message type " + msg.what); 317 return; 318 } 319 } 320 } 321 322 private static void postEventFromNative(Object camera_ref, 323 int what, int arg1, int arg2, Object obj) 324 { 325 Camera c = (Camera)((WeakReference)camera_ref).get(); 326 if (c == null) 327 return; 328 329 if (c.mEventHandler != null) { 330 Message m = c.mEventHandler.obtainMessage(what, arg1, arg2, obj); 331 c.mEventHandler.sendMessage(m); 332 } 333 } 334 335 /** 336 * Handles the callback for the camera auto focus. 337 * <p>Devices that do not support auto-focus will receive a "fake" 338 * callback to this interface. If your application needs auto-focus and 339 * should not be installed on devices <em>without</em> auto-focus, you must 340 * declare that your app uses the 341 * {@code android.hardware.camera.autofocus} feature, in the 342 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 343 * manifest element.</p> 344 */ 345 public interface AutoFocusCallback 346 { 347 /** 348 * Callback for the camera auto focus. If the camera does not support 349 * auto-focus and autoFocus is called, onAutoFocus will be called 350 * immediately with success. 351 * 352 * @param success true if focus was successful, false if otherwise 353 * @param camera the Camera service object 354 */ 355 void onAutoFocus(boolean success, Camera camera); 356 }; 357 358 /** 359 * Starts auto-focus function and registers a callback function to run when 360 * camera is focused. Only valid after startPreview() has been called. 361 * Applications should call {@link 362 * android.hardware.Camera.Parameters#getFocusMode()} to determine if this 363 * method should be called. If the camera does not support auto-focus, it is 364 * a no-op and {@link AutoFocusCallback#onAutoFocus(boolean, Camera)} 365 * callback will be called immediately. 366 * <p>If your application should not be installed 367 * on devices without auto-focus, you must declare that your application 368 * uses auto-focus with the 369 * <a href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><uses-feature></a> 370 * manifest element.</p> 371 * 372 * @param cb the callback to run 373 */ 374 public final void autoFocus(AutoFocusCallback cb) 375 { 376 mAutoFocusCallback = cb; 377 native_autoFocus(); 378 } 379 private native final void native_autoFocus(); 380 381 /** 382 * Cancels auto-focus function. If the auto-focus is still in progress, 383 * this function will cancel it. Whether the auto-focus is in progress 384 * or not, this function will return the focus position to the default. 385 * If the camera does not support auto-focus, this is a no-op. 386 */ 387 public final void cancelAutoFocus() 388 { 389 mAutoFocusCallback = null; 390 native_cancelAutoFocus(); 391 } 392 private native final void native_cancelAutoFocus(); 393 394 /** 395 * An interface which contains a callback for the shutter closing after taking a picture. 396 */ 397 public interface ShutterCallback 398 { 399 /** 400 * Can be used to play a shutter sound as soon as the image has been captured, but before 401 * the data is available. 402 */ 403 void onShutter(); 404 } 405 406 /** 407 * Handles the callback for when a picture is taken. 408 */ 409 public interface PictureCallback { 410 /** 411 * Callback for when a picture is taken. 412 * 413 * @param data a byte array of the picture data 414 * @param camera the Camera service object 415 */ 416 void onPictureTaken(byte[] data, Camera camera); 417 }; 418 419 /** 420 * Triggers an asynchronous image capture. The camera service will initiate 421 * a series of callbacks to the application as the image capture progresses. 422 * The shutter callback occurs after the image is captured. This can be used 423 * to trigger a sound to let the user know that image has been captured. The 424 * raw callback occurs when the raw image data is available (NOTE: the data 425 * may be null if the hardware does not have enough memory to make a copy). 426 * The jpeg callback occurs when the compressed image is available. If the 427 * application does not need a particular callback, a null can be passed 428 * instead of a callback method. 429 * 430 * @param shutter callback after the image is captured, may be null 431 * @param raw callback with raw image data, may be null 432 * @param jpeg callback with jpeg image data, may be null 433 */ 434 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 435 PictureCallback jpeg) { 436 takePicture(shutter, raw, null, jpeg); 437 } 438 private native final void native_takePicture(); 439 440 /** 441 * Triggers an asynchronous image capture. The camera service will initiate 442 * a series of callbacks to the application as the image capture progresses. 443 * The shutter callback occurs after the image is captured. This can be used 444 * to trigger a sound to let the user know that image has been captured. The 445 * raw callback occurs when the raw image data is available (NOTE: the data 446 * may be null if the hardware does not have enough memory to make a copy). 447 * The postview callback occurs when a scaled, fully processed postview 448 * image is available (NOTE: not all hardware supports this). The jpeg 449 * callback occurs when the compressed image is available. If the 450 * application does not need a particular callback, a null can be passed 451 * instead of a callback method. 452 * 453 * @param shutter callback after the image is captured, may be null 454 * @param raw callback with raw image data, may be null 455 * @param postview callback with postview image data, may be null 456 * @param jpeg callback with jpeg image data, may be null 457 */ 458 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 459 PictureCallback postview, PictureCallback jpeg) { 460 mShutterCallback = shutter; 461 mRawImageCallback = raw; 462 mPostviewCallback = postview; 463 mJpegCallback = jpeg; 464 native_takePicture(); 465 } 466 467 /** 468 * Handles the zoom callback. 469 */ 470 public interface ZoomCallback 471 { 472 /** 473 * Callback for zoom updates 474 * @param zoomLevel new zoom level in 1/1000 increments, 475 * e.g. a zoom of 3.2x is stored as 3200. Accuracy of the 476 * value is dependent on the hardware implementation. Not 477 * all devices will generate this callback. 478 * @param camera the Camera service object 479 */ 480 void onZoomUpdate(int zoomLevel, Camera camera); 481 }; 482 483 /** 484 * Registers a callback to be invoked when the zoom 485 * level is updated by the camera driver. 486 * @param cb the callback to run 487 */ 488 public final void setZoomCallback(ZoomCallback cb) 489 { 490 mZoomCallback = cb; 491 } 492 493 // These match the enum in include/ui/Camera.h 494 /** Unspecified camerar error. @see #ErrorCallback */ 495 public static final int CAMERA_ERROR_UNKNOWN = 1; 496 /** Media server died. In this case, the application must release the 497 * Camera object and instantiate a new one. @see #ErrorCallback */ 498 public static final int CAMERA_ERROR_SERVER_DIED = 100; 499 500 /** 501 * Handles the camera error callback. 502 */ 503 public interface ErrorCallback 504 { 505 /** 506 * Callback for camera errors. 507 * @param error error code: 508 * <ul> 509 * <li>{@link #CAMERA_ERROR_UNKNOWN} 510 * <li>{@link #CAMERA_ERROR_SERVER_DIED} 511 * </ul> 512 * @param camera the Camera service object 513 */ 514 void onError(int error, Camera camera); 515 }; 516 517 /** 518 * Registers a callback to be invoked when an error occurs. 519 * @param cb the callback to run 520 */ 521 public final void setErrorCallback(ErrorCallback cb) 522 { 523 mErrorCallback = cb; 524 } 525 526 private native final void native_setParameters(String params); 527 private native final String native_getParameters(); 528 529 /** 530 * Sets the Parameters for pictures from this Camera service. 531 * 532 * @param params the Parameters to use for this Camera service 533 */ 534 public void setParameters(Parameters params) { 535 native_setParameters(params.flatten()); 536 } 537 538 /** 539 * Returns the picture Parameters for this Camera service. 540 */ 541 public Parameters getParameters() { 542 Parameters p = new Parameters(); 543 String s = native_getParameters(); 544 p.unflatten(s); 545 return p; 546 } 547 548 /** 549 * Handles the picture size (dimensions). 550 */ 551 public class Size { 552 /** 553 * Sets the dimensions for pictures. 554 * 555 * @param w the photo width (pixels) 556 * @param h the photo height (pixels) 557 */ 558 public Size(int w, int h) { 559 width = w; 560 height = h; 561 } 562 /** width of the picture */ 563 public int width; 564 /** height of the picture */ 565 public int height; 566 }; 567 568 /** 569 * Handles the parameters for pictures created by a Camera service. 570 * 571 * <p>To make camera parameters take effect, applications have to call 572 * Camera.setParameters. For example, after setWhiteBalance is called, white 573 * balance is not changed until Camera.setParameters() is called. 574 * 575 * <p>Different devices may have different camera capabilities, such as 576 * picture size or flash modes. The application should query the camera 577 * capabilities before setting parameters. For example, the application 578 * should call getSupportedColorEffects before calling setEffect. If the 579 * camera does not support color effects, getSupportedColorEffects will 580 * return null. 581 */ 582 public class Parameters { 583 // Parameter keys to communicate with the camera driver. 584 private static final String KEY_PREVIEW_SIZE = "preview-size"; 585 private static final String KEY_PREVIEW_FORMAT = "preview-format"; 586 private static final String KEY_PREVIEW_FRAME_RATE = "preview-frame-rate"; 587 private static final String KEY_PICTURE_SIZE = "picture-size"; 588 private static final String KEY_PICTURE_FORMAT = "picture-format"; 589 private static final String KEY_JPEG_THUMBNAIL_WIDTH = "jpeg-thumbnail-width"; 590 private static final String KEY_JPEG_THUMBNAIL_HEIGHT = "jpeg-thumbnail-height"; 591 private static final String KEY_JPEG_THUMBNAIL_QUALITY = "jpeg-thumbnail-quality"; 592 private static final String KEY_JPEG_QUALITY = "jpeg-quality"; 593 private static final String KEY_ROTATION = "rotation"; 594 private static final String KEY_GPS_LATITUDE = "gps-latitude"; 595 private static final String KEY_GPS_LONGITUDE = "gps-longitude"; 596 private static final String KEY_GPS_ALTITUDE = "gps-altitude"; 597 private static final String KEY_GPS_TIMESTAMP = "gps-timestamp"; 598 private static final String KEY_WHITE_BALANCE = "whitebalance"; 599 private static final String KEY_EFFECT = "effect"; 600 private static final String KEY_ANTIBANDING = "antibanding"; 601 private static final String KEY_SCENE_MODE = "scene-mode"; 602 private static final String KEY_FLASH_MODE = "flash-mode"; 603 private static final String KEY_FOCUS_MODE = "focus-mode"; 604 // Parameter key suffix for supported values. 605 private static final String SUPPORTED_VALUES_SUFFIX = "-values"; 606 607 // Values for white balance settings. 608 public static final String WHITE_BALANCE_AUTO = "auto"; 609 public static final String WHITE_BALANCE_INCANDESCENT = "incandescent"; 610 public static final String WHITE_BALANCE_FLUORESCENT = "fluorescent"; 611 public static final String WHITE_BALANCE_WARM_FLUORESCENT = "warm-fluorescent"; 612 public static final String WHITE_BALANCE_DAYLIGHT = "daylight"; 613 public static final String WHITE_BALANCE_CLOUDY_DAYLIGHT = "cloudy-daylight"; 614 public static final String WHITE_BALANCE_TWILIGHT = "twilight"; 615 public static final String WHITE_BALANCE_SHADE = "shade"; 616 617 // Values for color effect settings. 618 public static final String EFFECT_NONE = "none"; 619 public static final String EFFECT_MONO = "mono"; 620 public static final String EFFECT_NEGATIVE = "negative"; 621 public static final String EFFECT_SOLARIZE = "solarize"; 622 public static final String EFFECT_SEPIA = "sepia"; 623 public static final String EFFECT_POSTERIZE = "posterize"; 624 public static final String EFFECT_WHITEBOARD = "whiteboard"; 625 public static final String EFFECT_BLACKBOARD = "blackboard"; 626 public static final String EFFECT_AQUA = "aqua"; 627 628 // Values for antibanding settings. 629 public static final String ANTIBANDING_AUTO = "auto"; 630 public static final String ANTIBANDING_50HZ = "50hz"; 631 public static final String ANTIBANDING_60HZ = "60hz"; 632 public static final String ANTIBANDING_OFF = "off"; 633 634 // Values for flash mode settings. 635 /** 636 * Flash will not be fired. 637 */ 638 public static final String FLASH_MODE_OFF = "off"; 639 /** 640 * Flash will be fired automatically when required. The timing is 641 * decided by camera driver. 642 */ 643 public static final String FLASH_MODE_AUTO = "auto"; 644 /** 645 * Flash will always be fired. The timing is decided by camera driver. 646 */ 647 public static final String FLASH_MODE_ON = "on"; 648 /** 649 * Flash will be fired in red-eye reduction mode. 650 */ 651 public static final String FLASH_MODE_RED_EYE = "red-eye"; 652 /** 653 * Constant emission of light. This can be used for video recording. 654 */ 655 public static final String FLASH_MODE_VIDEO_LIGHT = "video-light"; 656 657 // Values for scene mode settings. 658 public static final String SCENE_MODE_AUTO = "auto"; 659 public static final String SCENE_MODE_ACTION = "action"; 660 public static final String SCENE_MODE_PORTRAIT = "portrait"; 661 public static final String SCENE_MODE_LANDSCAPE = "landscape"; 662 public static final String SCENE_MODE_NIGHT = "night"; 663 public static final String SCENE_MODE_NIGHT_PORTRAIT = "night-portrait"; 664 public static final String SCENE_MODE_THEATRE = "theatre"; 665 public static final String SCENE_MODE_BEACH = "beach"; 666 public static final String SCENE_MODE_SNOW = "snow"; 667 public static final String SCENE_MODE_SUNSET = "sunset"; 668 public static final String SCENE_MODE_STEADYPHOTO = "steadyphoto"; 669 public static final String SCENE_MODE_FIREWORKS = "fireworks"; 670 public static final String SCENE_MODE_SPORTS = "sports"; 671 public static final String SCENE_MODE_PARTY = "party"; 672 public static final String SCENE_MODE_CANDLELIGHT = "candlelight"; 673 674 // Values for focus mode settings. 675 /** 676 * Auto-focus mode. 677 */ 678 public static final String FOCUS_MODE_AUTO = "auto"; 679 /** 680 * Focus is set at infinity. Applications should not call 681 * {@link #autoFocus(AutoFocusCallback)} in this mode. 682 */ 683 public static final String FOCUS_MODE_INFINITY = "infinity"; 684 public static final String FOCUS_MODE_MACRO = "macro"; 685 /** 686 * Focus is fixed. The camera is always in this mode if the focus is not 687 * adjustable. If the camera has auto-focus, this mode can fix the 688 * focus, which is usually at hyperfocal distance. Applications should 689 * not call {@link #autoFocus(AutoFocusCallback)} in this mode. 690 */ 691 public static final String FOCUS_MODE_FIXED = "fixed"; 692 693 // Formats for setPreviewFormat and setPictureFormat. 694 private static final String PIXEL_FORMAT_YUV422SP = "yuv422sp"; 695 private static final String PIXEL_FORMAT_YUV420SP = "yuv420sp"; 696 private static final String PIXEL_FORMAT_YUV422I = "yuv422i-yuyv"; 697 private static final String PIXEL_FORMAT_RGB565 = "rgb565"; 698 private static final String PIXEL_FORMAT_JPEG = "jpeg"; 699 700 private HashMap<String, String> mMap; 701 702 private Parameters() { 703 mMap = new HashMap<String, String>(); 704 } 705 706 /** 707 * Writes the current Parameters to the log. 708 * @hide 709 * @deprecated 710 */ 711 public void dump() { 712 Log.e(TAG, "dump: size=" + mMap.size()); 713 for (String k : mMap.keySet()) { 714 Log.e(TAG, "dump: " + k + "=" + mMap.get(k)); 715 } 716 } 717 718 /** 719 * Creates a single string with all the parameters set in 720 * this Parameters object. 721 * <p>The {@link #unflatten(String)} method does the reverse.</p> 722 * 723 * @return a String with all values from this Parameters object, in 724 * semi-colon delimited key-value pairs 725 */ 726 public String flatten() { 727 StringBuilder flattened = new StringBuilder(); 728 for (String k : mMap.keySet()) { 729 flattened.append(k); 730 flattened.append("="); 731 flattened.append(mMap.get(k)); 732 flattened.append(";"); 733 } 734 // chop off the extra semicolon at the end 735 flattened.deleteCharAt(flattened.length()-1); 736 return flattened.toString(); 737 } 738 739 /** 740 * Takes a flattened string of parameters and adds each one to 741 * this Parameters object. 742 * <p>The {@link #flatten()} method does the reverse.</p> 743 * 744 * @param flattened a String of parameters (key-value paired) that 745 * are semi-colon delimited 746 */ 747 public void unflatten(String flattened) { 748 mMap.clear(); 749 750 StringTokenizer tokenizer = new StringTokenizer(flattened, ";"); 751 while (tokenizer.hasMoreElements()) { 752 String kv = tokenizer.nextToken(); 753 int pos = kv.indexOf('='); 754 if (pos == -1) { 755 continue; 756 } 757 String k = kv.substring(0, pos); 758 String v = kv.substring(pos + 1); 759 mMap.put(k, v); 760 } 761 } 762 763 public void remove(String key) { 764 mMap.remove(key); 765 } 766 767 /** 768 * Sets a String parameter. 769 * 770 * @param key the key name for the parameter 771 * @param value the String value of the parameter 772 */ 773 public void set(String key, String value) { 774 if (key.indexOf('=') != -1 || key.indexOf(';') != -1) { 775 Log.e(TAG, "Key \"" + key + "\" contains invalid character (= or ;)"); 776 return; 777 } 778 if (value.indexOf('=') != -1 || value.indexOf(';') != -1) { 779 Log.e(TAG, "Value \"" + value + "\" contains invalid character (= or ;)"); 780 return; 781 } 782 783 mMap.put(key, value); 784 } 785 786 /** 787 * Sets an integer parameter. 788 * 789 * @param key the key name for the parameter 790 * @param value the int value of the parameter 791 */ 792 public void set(String key, int value) { 793 mMap.put(key, Integer.toString(value)); 794 } 795 796 /** 797 * Returns the value of a String parameter. 798 * 799 * @param key the key name for the parameter 800 * @return the String value of the parameter 801 */ 802 public String get(String key) { 803 return mMap.get(key); 804 } 805 806 /** 807 * Returns the value of an integer parameter. 808 * 809 * @param key the key name for the parameter 810 * @return the int value of the parameter 811 */ 812 public int getInt(String key) { 813 return Integer.parseInt(mMap.get(key)); 814 } 815 816 /** 817 * Sets the dimensions for preview pictures. 818 * 819 * @param width the width of the pictures, in pixels 820 * @param height the height of the pictures, in pixels 821 */ 822 public void setPreviewSize(int width, int height) { 823 String v = Integer.toString(width) + "x" + Integer.toString(height); 824 set(KEY_PREVIEW_SIZE, v); 825 } 826 827 /** 828 * Returns the dimensions setting for preview pictures. 829 * 830 * @return a Size object with the height and width setting 831 * for the preview picture 832 */ 833 public Size getPreviewSize() { 834 String pair = get(KEY_PREVIEW_SIZE); 835 return strToSize(pair); 836 } 837 838 /** 839 * Gets the supported preview sizes. 840 * 841 * @return a List of Size object. null if preview size setting is not 842 * supported. 843 */ 844 public List<Size> getSupportedPreviewSizes() { 845 String str = get(KEY_PREVIEW_SIZE + SUPPORTED_VALUES_SUFFIX); 846 return splitSize(str); 847 } 848 849 /** 850 * Sets the dimensions for EXIF thumbnail in Jpeg picture. 851 * 852 * @param width the width of the thumbnail, in pixels 853 * @param height the height of the thumbnail, in pixels 854 */ 855 public void setJpegThumbnailSize(int width, int height) { 856 set(KEY_JPEG_THUMBNAIL_WIDTH, width); 857 set(KEY_JPEG_THUMBNAIL_HEIGHT, height); 858 } 859 860 /** 861 * Returns the dimensions for EXIF thumbnail in Jpeg picture. 862 * 863 * @return a Size object with the height and width setting for the EXIF 864 * thumbnails 865 */ 866 public Size getJpegThumbnailSize() { 867 return new Size(getInt(KEY_JPEG_THUMBNAIL_WIDTH), 868 getInt(KEY_JPEG_THUMBNAIL_HEIGHT)); 869 } 870 871 /** 872 * Sets the quality of the EXIF thumbnail in Jpeg picture. 873 * 874 * @param quality the JPEG quality of the EXIF thumbnail. The range is 1 875 * to 100, with 100 being the best. 876 */ 877 public void setJpegThumbnailQuality(int quality) { 878 set(KEY_JPEG_THUMBNAIL_QUALITY, quality); 879 } 880 881 /** 882 * Returns the quality setting for the EXIF thumbnail in Jpeg picture. 883 * 884 * @return the JPEG quality setting of the EXIF thumbnail. 885 */ 886 public int getJpegThumbnailQuality() { 887 return getInt(KEY_JPEG_THUMBNAIL_QUALITY); 888 } 889 890 /** 891 * Sets Jpeg quality of captured picture. 892 * 893 * @param quality the JPEG quality of captured picture. The range is 1 894 * to 100, with 100 being the best. 895 */ 896 public void setJpegQuality(int quality) { 897 set(KEY_JPEG_QUALITY, quality); 898 } 899 900 /** 901 * Returns the quality setting for the JPEG picture. 902 * 903 * @return the JPEG picture quality setting. 904 */ 905 public int getJpegQuality() { 906 return getInt(KEY_JPEG_QUALITY); 907 } 908 909 /** 910 * Sets the rate at which preview frames are received. 911 * 912 * @param fps the frame rate (frames per second) 913 */ 914 public void setPreviewFrameRate(int fps) { 915 set(KEY_PREVIEW_FRAME_RATE, fps); 916 } 917 918 /** 919 * Returns the setting for the rate at which preview frames 920 * are received. 921 * 922 * @return the frame rate setting (frames per second) 923 */ 924 public int getPreviewFrameRate() { 925 return getInt(KEY_PREVIEW_FRAME_RATE); 926 } 927 928 /** 929 * Gets the supported preview frame rates. 930 * 931 * @return a List of Integer objects (preview frame rates). null if 932 * preview frame rate setting is not supported. 933 */ 934 public List<Integer> getSupportedPreviewFrameRates() { 935 String str = get(KEY_PREVIEW_FRAME_RATE + SUPPORTED_VALUES_SUFFIX); 936 return splitInt(str); 937 } 938 939 /** 940 * Sets the image format for preview pictures. 941 * <p>If this is never called, the default format will be 942 * {@link android.graphics.PixelFormat#YCbCr_420_SP}, which 943 * uses the NV21 encoding format.</p> 944 * 945 * @param pixel_format the desired preview picture format, defined 946 * by one of the {@link android.graphics.PixelFormat} constants. 947 * (E.g., <var>PixelFormat.YCbCr_420_SP</var> (default), 948 * <var>PixelFormat.RGB_565</var>, or 949 * <var>PixelFormat.JPEG</var>) 950 * @see android.graphics.PixelFormat 951 */ 952 public void setPreviewFormat(int pixel_format) { 953 String s = cameraFormatForPixelFormat(pixel_format); 954 if (s == null) { 955 throw new IllegalArgumentException( 956 "Invalid pixel_format=" + pixel_format); 957 } 958 959 set(KEY_PREVIEW_FORMAT, s); 960 } 961 962 /** 963 * Returns the image format for preview pictures got from 964 * {@link PreviewCallback}. 965 * 966 * @return the {@link android.graphics.PixelFormat} int representing 967 * the preview picture format. 968 */ 969 public int getPreviewFormat() { 970 return pixelFormatForCameraFormat(get(KEY_PREVIEW_FORMAT)); 971 } 972 973 /** 974 * Gets the supported preview formats. 975 * 976 * @return a List of Integer objects. null if preview format setting is 977 * not supported. 978 */ 979 public List<Integer> getSupportedPreviewFormats() { 980 String str = get(KEY_PREVIEW_FORMAT + SUPPORTED_VALUES_SUFFIX); 981 ArrayList<Integer> formats = new ArrayList<Integer>(); 982 for (String s : split(str)) { 983 int f = pixelFormatForCameraFormat(s); 984 if (f == PixelFormat.UNKNOWN) continue; 985 formats.add(f); 986 } 987 return formats; 988 } 989 990 /** 991 * Sets the dimensions for pictures. 992 * 993 * @param width the width for pictures, in pixels 994 * @param height the height for pictures, in pixels 995 */ 996 public void setPictureSize(int width, int height) { 997 String v = Integer.toString(width) + "x" + Integer.toString(height); 998 set(KEY_PICTURE_SIZE, v); 999 } 1000 1001 /** 1002 * Returns the dimension setting for pictures. 1003 * 1004 * @return a Size object with the height and width setting 1005 * for pictures 1006 */ 1007 public Size getPictureSize() { 1008 String pair = get(KEY_PICTURE_SIZE); 1009 return strToSize(pair); 1010 } 1011 1012 /** 1013 * Gets the supported picture sizes. 1014 * 1015 * @return a List of Size objects. null if picture size setting is not 1016 * supported. 1017 */ 1018 public List<Size> getSupportedPictureSizes() { 1019 String str = get(KEY_PICTURE_SIZE + SUPPORTED_VALUES_SUFFIX); 1020 return splitSize(str); 1021 } 1022 1023 /** 1024 * Sets the image format for pictures. 1025 * 1026 * @param pixel_format the desired picture format 1027 * (<var>PixelFormat.YCbCr_420_SP (NV21)</var>, 1028 * <var>PixelFormat.RGB_565</var>, or 1029 * <var>PixelFormat.JPEG</var>) 1030 * @see android.graphics.PixelFormat 1031 */ 1032 public void setPictureFormat(int pixel_format) { 1033 String s = cameraFormatForPixelFormat(pixel_format); 1034 if (s == null) { 1035 throw new IllegalArgumentException( 1036 "Invalid pixel_format=" + pixel_format); 1037 } 1038 1039 set(KEY_PICTURE_FORMAT, s); 1040 } 1041 1042 /** 1043 * Returns the image format for pictures. 1044 * 1045 * @return the PixelFormat int representing the picture format 1046 */ 1047 public int getPictureFormat() { 1048 return pixelFormatForCameraFormat(get(KEY_PICTURE_FORMAT)); 1049 } 1050 1051 /** 1052 * Gets the supported picture formats. 1053 * 1054 * @return a List of Integer objects (values are PixelFormat.XXX). null 1055 * if picture setting is not supported. 1056 */ 1057 public List<Integer> getSupportedPictureFormats() { 1058 String str = get(KEY_PICTURE_SIZE + SUPPORTED_VALUES_SUFFIX); 1059 return splitInt(str); 1060 } 1061 1062 private String cameraFormatForPixelFormat(int pixel_format) { 1063 switch(pixel_format) { 1064 case PixelFormat.YCbCr_422_SP: return PIXEL_FORMAT_YUV422SP; 1065 case PixelFormat.YCbCr_420_SP: return PIXEL_FORMAT_YUV420SP; 1066 case PixelFormat.YCbCr_422_I: return PIXEL_FORMAT_YUV422I; 1067 case PixelFormat.RGB_565: return PIXEL_FORMAT_RGB565; 1068 case PixelFormat.JPEG: return PIXEL_FORMAT_JPEG; 1069 default: return null; 1070 } 1071 } 1072 1073 private int pixelFormatForCameraFormat(String format) { 1074 if (format == null) 1075 return PixelFormat.UNKNOWN; 1076 1077 if (format.equals(PIXEL_FORMAT_YUV422SP)) 1078 return PixelFormat.YCbCr_422_SP; 1079 1080 if (format.equals(PIXEL_FORMAT_YUV420SP)) 1081 return PixelFormat.YCbCr_420_SP; 1082 1083 if (format.equals(PIXEL_FORMAT_YUV422I)) 1084 return PixelFormat.YCbCr_422_I; 1085 1086 if (format.equals(PIXEL_FORMAT_RGB565)) 1087 return PixelFormat.RGB_565; 1088 1089 if (format.equals(PIXEL_FORMAT_JPEG)) 1090 return PixelFormat.JPEG; 1091 1092 return PixelFormat.UNKNOWN; 1093 } 1094 1095 /** 1096 * Sets the orientation of the device in degrees. For example, suppose 1097 * the natural position of the device is landscape. If the user takes a 1098 * picture in landscape mode in 2048x1536 resolution, the rotation 1099 * should be set to 0. If the user rotates the phone 90 degrees 1100 * clockwise, the rotation should be set to 90. Applications can use 1101 * {@link android.view.OrientationEventListener} to set this parameter. 1102 * 1103 * The camera driver may set orientation in the EXIF header without 1104 * rotating the picture. Or the driver may rotate the picture and 1105 * the EXIF thumbnail. If the Jpeg picture is rotated, the orientation 1106 * in the EXIF header will be missing or 1 (row #0 is top and column #0 1107 * is left side). 1108 * 1109 * @param rotation The orientation of the device in degrees. Rotation 1110 * can only be 0, 90, 180 or 270. 1111 * @throws IllegalArgumentException if rotation value is invalid. 1112 * @see android.view.OrientationEventListener 1113 */ 1114 public void setRotation(int rotation) { 1115 if (rotation == 0 || rotation == 90 || rotation == 180 1116 || rotation == 270) { 1117 set(KEY_ROTATION, Integer.toString(rotation)); 1118 } else { 1119 throw new IllegalArgumentException( 1120 "Invalid rotation=" + rotation); 1121 } 1122 } 1123 1124 /** 1125 * Sets GPS latitude coordinate. This will be stored in JPEG EXIF 1126 * header. 1127 * 1128 * @param latitude GPS latitude coordinate. 1129 */ 1130 public void setGpsLatitude(double latitude) { 1131 set(KEY_GPS_LATITUDE, Double.toString(latitude)); 1132 } 1133 1134 /** 1135 * Sets GPS longitude coordinate. This will be stored in JPEG EXIF 1136 * header. 1137 * 1138 * @param longitude GPS longitude coordinate. 1139 */ 1140 public void setGpsLongitude(double longitude) { 1141 set(KEY_GPS_LONGITUDE, Double.toString(longitude)); 1142 } 1143 1144 /** 1145 * Sets GPS altitude. This will be stored in JPEG EXIF header. 1146 * 1147 * @param altitude GPS altitude in meters. 1148 */ 1149 public void setGpsAltitude(double altitude) { 1150 set(KEY_GPS_ALTITUDE, Double.toString(altitude)); 1151 } 1152 1153 /** 1154 * Sets GPS timestamp. This will be stored in JPEG EXIF header. 1155 * 1156 * @param timestamp GPS timestamp (UTC in seconds since January 1, 1157 * 1970). 1158 */ 1159 public void setGpsTimestamp(long timestamp) { 1160 set(KEY_GPS_TIMESTAMP, Long.toString(timestamp)); 1161 } 1162 1163 /** 1164 * Removes GPS latitude, longitude, altitude, and timestamp from the 1165 * parameters. 1166 */ 1167 public void removeGpsData() { 1168 remove(KEY_GPS_LATITUDE); 1169 remove(KEY_GPS_LONGITUDE); 1170 remove(KEY_GPS_ALTITUDE); 1171 remove(KEY_GPS_TIMESTAMP); 1172 } 1173 1174 /** 1175 * Gets the current white balance setting. 1176 * 1177 * @return one of WHITE_BALANCE_XXX string constant. null if white 1178 * balance setting is not supported. 1179 */ 1180 public String getWhiteBalance() { 1181 return get(KEY_WHITE_BALANCE); 1182 } 1183 1184 /** 1185 * Sets the white balance. 1186 * 1187 * @param value WHITE_BALANCE_XXX string constant. 1188 */ 1189 public void setWhiteBalance(String value) { 1190 set(KEY_WHITE_BALANCE, value); 1191 } 1192 1193 /** 1194 * Gets the supported white balance. 1195 * 1196 * @return a List of WHITE_BALANCE_XXX string constants. null if white 1197 * balance setting is not supported. 1198 */ 1199 public List<String> getSupportedWhiteBalance() { 1200 String str = get(KEY_WHITE_BALANCE + SUPPORTED_VALUES_SUFFIX); 1201 return split(str); 1202 } 1203 1204 /** 1205 * Gets the current color effect setting. 1206 * 1207 * @return one of EFFECT_XXX string constant. null if color effect 1208 * setting is not supported. 1209 */ 1210 public String getColorEffect() { 1211 return get(KEY_EFFECT); 1212 } 1213 1214 /** 1215 * Sets the current color effect setting. 1216 * 1217 * @param value EFFECT_XXX string constants. 1218 */ 1219 public void setColorEffect(String value) { 1220 set(KEY_EFFECT, value); 1221 } 1222 1223 /** 1224 * Gets the supported color effects. 1225 * 1226 * @return a List of EFFECT_XXX string constants. null if color effect 1227 * setting is not supported. 1228 */ 1229 public List<String> getSupportedColorEffects() { 1230 String str = get(KEY_EFFECT + SUPPORTED_VALUES_SUFFIX); 1231 return split(str); 1232 } 1233 1234 1235 /** 1236 * Gets the current antibanding setting. 1237 * 1238 * @return one of ANTIBANDING_XXX string constant. null if antibanding 1239 * setting is not supported. 1240 */ 1241 public String getAntibanding() { 1242 return get(KEY_ANTIBANDING); 1243 } 1244 1245 /** 1246 * Sets the antibanding. 1247 * 1248 * @param antibanding ANTIBANDING_XXX string constant. 1249 */ 1250 public void setAntibanding(String antibanding) { 1251 set(KEY_ANTIBANDING, antibanding); 1252 } 1253 1254 /** 1255 * Gets the supported antibanding values. 1256 * 1257 * @return a List of ANTIBANDING_XXX string constants. null if 1258 * antibanding setting is not supported. 1259 */ 1260 public List<String> getSupportedAntibanding() { 1261 String str = get(KEY_ANTIBANDING + SUPPORTED_VALUES_SUFFIX); 1262 return split(str); 1263 } 1264 1265 /** 1266 * Gets the current scene mode setting. 1267 * 1268 * @return one of SCENE_MODE_XXX string constant. null if scene mode 1269 * setting is not supported. 1270 */ 1271 public String getSceneMode() { 1272 return get(KEY_SCENE_MODE); 1273 } 1274 1275 /** 1276 * Sets the scene mode. 1277 * 1278 * @param value SCENE_MODE_XXX string constants. 1279 */ 1280 public void setSceneMode(String value) { 1281 set(KEY_SCENE_MODE, value); 1282 } 1283 1284 /** 1285 * Gets the supported scene modes. 1286 * 1287 * @return a List of SCENE_MODE_XXX string constant. null if scene mode 1288 * setting is not supported. 1289 */ 1290 public List<String> getSupportedSceneModes() { 1291 String str = get(KEY_SCENE_MODE + SUPPORTED_VALUES_SUFFIX); 1292 return split(str); 1293 } 1294 1295 /** 1296 * Gets the current flash mode setting. 1297 * 1298 * @return one of FLASH_MODE_XXX string constant. null if flash mode 1299 * setting is not supported. 1300 */ 1301 public String getFlashMode() { 1302 return get(KEY_FLASH_MODE); 1303 } 1304 1305 /** 1306 * Sets the flash mode. 1307 * 1308 * @param value FLASH_MODE_XXX string constants. 1309 */ 1310 public void setFlashMode(String value) { 1311 set(KEY_FLASH_MODE, value); 1312 } 1313 1314 /** 1315 * Gets the supported flash modes. 1316 * 1317 * @return a List of FLASH_MODE_XXX string constants. null if flash mode 1318 * setting is not supported. 1319 */ 1320 public List<String> getSupportedFlashModes() { 1321 String str = get(KEY_FLASH_MODE + SUPPORTED_VALUES_SUFFIX); 1322 return split(str); 1323 } 1324 1325 /** 1326 * Gets the current focus mode setting. 1327 * 1328 * @return one of FOCUS_MODE_XXX string constant. If the camera does not 1329 * support auto-focus, this should return {@link 1330 * #FOCUS_MODE_FIXED}. If the focus mode is not FOCUS_MODE_FIXED 1331 * or {@link #FOCUS_MODE_INFINITY}, applications should call 1332 * {@link #autoFocus(AutoFocusCallback)} to start the focus. 1333 */ 1334 public String getFocusMode() { 1335 return get(KEY_FOCUS_MODE); 1336 } 1337 1338 /** 1339 * Sets the focus mode. 1340 * 1341 * @param value FOCUS_MODE_XXX string constants. 1342 */ 1343 public void setFocusMode(String value) { 1344 set(KEY_FOCUS_MODE, value); 1345 } 1346 1347 /** 1348 * Gets the supported focus modes. 1349 * 1350 * @return a List of FOCUS_MODE_XXX string constants. null if focus mode 1351 * setting is not supported. 1352 */ 1353 public List<String> getSupportedFocusModes() { 1354 String str = get(KEY_FOCUS_MODE + SUPPORTED_VALUES_SUFFIX); 1355 return split(str); 1356 } 1357 1358 // Splits a comma delimited string to an ArrayList of String. 1359 // Return null if the passing string is null or the size is 0. 1360 private ArrayList<String> split(String str) { 1361 if (str == null) return null; 1362 1363 // Use StringTokenizer because it is faster than split. 1364 StringTokenizer tokenizer = new StringTokenizer(str, ","); 1365 ArrayList<String> substrings = new ArrayList<String>(); 1366 while (tokenizer.hasMoreElements()) { 1367 substrings.add(tokenizer.nextToken()); 1368 } 1369 return substrings; 1370 } 1371 1372 // Splits a comma delimited string to an ArrayList of Integer. 1373 // Return null if the passing string is null or the size is 0. 1374 private ArrayList<Integer> splitInt(String str) { 1375 if (str == null) return null; 1376 1377 StringTokenizer tokenizer = new StringTokenizer(str, ","); 1378 ArrayList<Integer> substrings = new ArrayList<Integer>(); 1379 while (tokenizer.hasMoreElements()) { 1380 String token = tokenizer.nextToken(); 1381 substrings.add(Integer.parseInt(token)); 1382 } 1383 if (substrings.size() == 0) return null; 1384 return substrings; 1385 } 1386 1387 // Splits a comma delimited string to an ArrayList of Size. 1388 // Return null if the passing string is null or the size is 0. 1389 private ArrayList<Size> splitSize(String str) { 1390 if (str == null) return null; 1391 1392 StringTokenizer tokenizer = new StringTokenizer(str, ","); 1393 ArrayList<Size> sizeList = new ArrayList<Size>(); 1394 while (tokenizer.hasMoreElements()) { 1395 Size size = strToSize(tokenizer.nextToken()); 1396 if (size != null) sizeList.add(size); 1397 } 1398 if (sizeList.size() == 0) return null; 1399 return sizeList; 1400 } 1401 1402 // Parses a string (ex: "480x320") to Size object. 1403 // Return null if the passing string is null. 1404 private Size strToSize(String str) { 1405 if (str == null) return null; 1406 1407 int pos = str.indexOf('x'); 1408 if (pos != -1) { 1409 String width = str.substring(0, pos); 1410 String height = str.substring(pos + 1); 1411 return new Size(Integer.parseInt(width), 1412 Integer.parseInt(height)); 1413 } 1414 Log.e(TAG, "Invalid size parameter string=" + str); 1415 return null; 1416 } 1417 }; 1418} 1419