Camera.java revision 068ef42c3ffe1eccec10f97f08541304f679fe67
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 * <p>If the current flash mode is not 372 * {@link android.hardware.Camera.Parameters#FLASH_MODE_OFF}, flash may be 373 * fired during auto-focus depending on the driver.<p> 374 * 375 * @param cb the callback to run 376 */ 377 public final void autoFocus(AutoFocusCallback cb) 378 { 379 mAutoFocusCallback = cb; 380 native_autoFocus(); 381 } 382 private native final void native_autoFocus(); 383 384 /** 385 * Cancels auto-focus function. If the auto-focus is still in progress, 386 * this function will cancel it. Whether the auto-focus is in progress 387 * or not, this function will return the focus position to the default. 388 * If the camera does not support auto-focus, this is a no-op. 389 */ 390 public final void cancelAutoFocus() 391 { 392 mAutoFocusCallback = null; 393 native_cancelAutoFocus(); 394 } 395 private native final void native_cancelAutoFocus(); 396 397 /** 398 * An interface which contains a callback for the shutter closing after taking a picture. 399 */ 400 public interface ShutterCallback 401 { 402 /** 403 * Can be used to play a shutter sound as soon as the image has been captured, but before 404 * the data is available. 405 */ 406 void onShutter(); 407 } 408 409 /** 410 * Handles the callback for when a picture is taken. 411 */ 412 public interface PictureCallback { 413 /** 414 * Callback for when a picture is taken. 415 * 416 * @param data a byte array of the picture data 417 * @param camera the Camera service object 418 */ 419 void onPictureTaken(byte[] data, Camera camera); 420 }; 421 422 /** 423 * Triggers an asynchronous image capture. The camera service will initiate 424 * a series of callbacks to the application as the image capture progresses. 425 * The shutter callback occurs after the image is captured. This can be used 426 * to trigger a sound to let the user know that image has been captured. The 427 * raw callback occurs when the raw image data is available (NOTE: the data 428 * may be null if the hardware does not have enough memory to make a copy). 429 * The jpeg callback occurs when the compressed image is available. If the 430 * application does not need a particular callback, a null can be passed 431 * instead of a callback method. 432 * 433 * @param shutter callback after the image is captured, may be null 434 * @param raw callback with raw image data, may be null 435 * @param jpeg callback with jpeg image data, may be null 436 */ 437 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 438 PictureCallback jpeg) { 439 takePicture(shutter, raw, null, jpeg); 440 } 441 private native final void native_takePicture(); 442 443 /** 444 * Triggers an asynchronous image capture. The camera service will initiate 445 * a series of callbacks to the application as the image capture progresses. 446 * The shutter callback occurs after the image is captured. This can be used 447 * to trigger a sound to let the user know that image has been captured. The 448 * raw callback occurs when the raw image data is available (NOTE: the data 449 * may be null if the hardware does not have enough memory to make a copy). 450 * The postview callback occurs when a scaled, fully processed postview 451 * image is available (NOTE: not all hardware supports this). The jpeg 452 * callback occurs when the compressed image is available. If the 453 * application does not need a particular callback, a null can be passed 454 * instead of a callback method. 455 * 456 * @param shutter callback after the image is captured, may be null 457 * @param raw callback with raw image data, may be null 458 * @param postview callback with postview image data, may be null 459 * @param jpeg callback with jpeg image data, may be null 460 */ 461 public final void takePicture(ShutterCallback shutter, PictureCallback raw, 462 PictureCallback postview, PictureCallback jpeg) { 463 mShutterCallback = shutter; 464 mRawImageCallback = raw; 465 mPostviewCallback = postview; 466 mJpegCallback = jpeg; 467 native_takePicture(); 468 } 469 470 /** 471 * Handles the zoom callback. 472 */ 473 public interface ZoomCallback 474 { 475 /** 476 * Callback for zoom updates 477 * @param zoomLevel new zoom level in 1/1000 increments, 478 * e.g. a zoom of 3.2x is stored as 3200. Accuracy of the 479 * value is dependent on the hardware implementation. Not 480 * all devices will generate this callback. 481 * @param camera the Camera service object 482 */ 483 void onZoomUpdate(int zoomLevel, Camera camera); 484 }; 485 486 /** 487 * Registers a callback to be invoked when the zoom 488 * level is updated by the camera driver. 489 * @param cb the callback to run 490 */ 491 public final void setZoomCallback(ZoomCallback cb) 492 { 493 mZoomCallback = cb; 494 } 495 496 // These match the enum in include/ui/Camera.h 497 /** Unspecified camerar error. @see #ErrorCallback */ 498 public static final int CAMERA_ERROR_UNKNOWN = 1; 499 /** Media server died. In this case, the application must release the 500 * Camera object and instantiate a new one. @see #ErrorCallback */ 501 public static final int CAMERA_ERROR_SERVER_DIED = 100; 502 503 /** 504 * Handles the camera error callback. 505 */ 506 public interface ErrorCallback 507 { 508 /** 509 * Callback for camera errors. 510 * @param error error code: 511 * <ul> 512 * <li>{@link #CAMERA_ERROR_UNKNOWN} 513 * <li>{@link #CAMERA_ERROR_SERVER_DIED} 514 * </ul> 515 * @param camera the Camera service object 516 */ 517 void onError(int error, Camera camera); 518 }; 519 520 /** 521 * Registers a callback to be invoked when an error occurs. 522 * @param cb the callback to run 523 */ 524 public final void setErrorCallback(ErrorCallback cb) 525 { 526 mErrorCallback = cb; 527 } 528 529 private native final void native_setParameters(String params); 530 private native final String native_getParameters(); 531 532 /** 533 * Sets the Parameters for pictures from this Camera service. 534 * 535 * @param params the Parameters to use for this Camera service 536 */ 537 public void setParameters(Parameters params) { 538 native_setParameters(params.flatten()); 539 } 540 541 /** 542 * Returns the picture Parameters for this Camera service. 543 */ 544 public Parameters getParameters() { 545 Parameters p = new Parameters(); 546 String s = native_getParameters(); 547 p.unflatten(s); 548 return p; 549 } 550 551 /** 552 * Handles the picture size (dimensions). 553 */ 554 public class Size { 555 /** 556 * Sets the dimensions for pictures. 557 * 558 * @param w the photo width (pixels) 559 * @param h the photo height (pixels) 560 */ 561 public Size(int w, int h) { 562 width = w; 563 height = h; 564 } 565 /** width of the picture */ 566 public int width; 567 /** height of the picture */ 568 public int height; 569 }; 570 571 /** 572 * Handles the parameters for pictures created by a Camera service. 573 * 574 * <p>To make camera parameters take effect, applications have to call 575 * Camera.setParameters. For example, after setWhiteBalance is called, white 576 * balance is not changed until Camera.setParameters() is called. 577 * 578 * <p>Different devices may have different camera capabilities, such as 579 * picture size or flash modes. The application should query the camera 580 * capabilities before setting parameters. For example, the application 581 * should call getSupportedColorEffects before calling setEffect. If the 582 * camera does not support color effects, getSupportedColorEffects will 583 * return null. 584 */ 585 public class Parameters { 586 // Parameter keys to communicate with the camera driver. 587 private static final String KEY_PREVIEW_SIZE = "preview-size"; 588 private static final String KEY_PREVIEW_FORMAT = "preview-format"; 589 private static final String KEY_PREVIEW_FRAME_RATE = "preview-frame-rate"; 590 private static final String KEY_PICTURE_SIZE = "picture-size"; 591 private static final String KEY_PICTURE_FORMAT = "picture-format"; 592 private static final String KEY_JPEG_THUMBNAIL_WIDTH = "jpeg-thumbnail-width"; 593 private static final String KEY_JPEG_THUMBNAIL_HEIGHT = "jpeg-thumbnail-height"; 594 private static final String KEY_JPEG_THUMBNAIL_QUALITY = "jpeg-thumbnail-quality"; 595 private static final String KEY_JPEG_QUALITY = "jpeg-quality"; 596 private static final String KEY_ROTATION = "rotation"; 597 private static final String KEY_GPS_LATITUDE = "gps-latitude"; 598 private static final String KEY_GPS_LONGITUDE = "gps-longitude"; 599 private static final String KEY_GPS_ALTITUDE = "gps-altitude"; 600 private static final String KEY_GPS_TIMESTAMP = "gps-timestamp"; 601 private static final String KEY_WHITE_BALANCE = "whitebalance"; 602 private static final String KEY_EFFECT = "effect"; 603 private static final String KEY_ANTIBANDING = "antibanding"; 604 private static final String KEY_SCENE_MODE = "scene-mode"; 605 private static final String KEY_FLASH_MODE = "flash-mode"; 606 private static final String KEY_FOCUS_MODE = "focus-mode"; 607 // Parameter key suffix for supported values. 608 private static final String SUPPORTED_VALUES_SUFFIX = "-values"; 609 610 // Values for white balance settings. 611 public static final String WHITE_BALANCE_AUTO = "auto"; 612 public static final String WHITE_BALANCE_INCANDESCENT = "incandescent"; 613 public static final String WHITE_BALANCE_FLUORESCENT = "fluorescent"; 614 public static final String WHITE_BALANCE_WARM_FLUORESCENT = "warm-fluorescent"; 615 public static final String WHITE_BALANCE_DAYLIGHT = "daylight"; 616 public static final String WHITE_BALANCE_CLOUDY_DAYLIGHT = "cloudy-daylight"; 617 public static final String WHITE_BALANCE_TWILIGHT = "twilight"; 618 public static final String WHITE_BALANCE_SHADE = "shade"; 619 620 // Values for color effect settings. 621 public static final String EFFECT_NONE = "none"; 622 public static final String EFFECT_MONO = "mono"; 623 public static final String EFFECT_NEGATIVE = "negative"; 624 public static final String EFFECT_SOLARIZE = "solarize"; 625 public static final String EFFECT_SEPIA = "sepia"; 626 public static final String EFFECT_POSTERIZE = "posterize"; 627 public static final String EFFECT_WHITEBOARD = "whiteboard"; 628 public static final String EFFECT_BLACKBOARD = "blackboard"; 629 public static final String EFFECT_AQUA = "aqua"; 630 631 // Values for antibanding settings. 632 public static final String ANTIBANDING_AUTO = "auto"; 633 public static final String ANTIBANDING_50HZ = "50hz"; 634 public static final String ANTIBANDING_60HZ = "60hz"; 635 public static final String ANTIBANDING_OFF = "off"; 636 637 // Values for flash mode settings. 638 /** 639 * Flash will not be fired. 640 */ 641 public static final String FLASH_MODE_OFF = "off"; 642 /** 643 * Flash will be fired automatically when required. The flash may be fired 644 * during preview, auto-focus, or snapshot depending on the driver. 645 */ 646 public static final String FLASH_MODE_AUTO = "auto"; 647 /** 648 * Flash will always be fired during snapshot. The flash may also be 649 * fired during preview or auto-focus depending on the driver. 650 */ 651 public static final String FLASH_MODE_ON = "on"; 652 /** 653 * Flash will be fired in red-eye reduction mode. 654 */ 655 public static final String FLASH_MODE_RED_EYE = "red-eye"; 656 /** 657 * Constant emission of light during preview, auto-focus and snapshot. 658 * This can also be used for video recording. 659 */ 660 public static final String FLASH_MODE_TORCH = "torch"; 661 662 // Values for scene mode settings. 663 public static final String SCENE_MODE_AUTO = "auto"; 664 public static final String SCENE_MODE_ACTION = "action"; 665 public static final String SCENE_MODE_PORTRAIT = "portrait"; 666 public static final String SCENE_MODE_LANDSCAPE = "landscape"; 667 public static final String SCENE_MODE_NIGHT = "night"; 668 public static final String SCENE_MODE_NIGHT_PORTRAIT = "night-portrait"; 669 public static final String SCENE_MODE_THEATRE = "theatre"; 670 public static final String SCENE_MODE_BEACH = "beach"; 671 public static final String SCENE_MODE_SNOW = "snow"; 672 public static final String SCENE_MODE_SUNSET = "sunset"; 673 public static final String SCENE_MODE_STEADYPHOTO = "steadyphoto"; 674 public static final String SCENE_MODE_FIREWORKS = "fireworks"; 675 public static final String SCENE_MODE_SPORTS = "sports"; 676 public static final String SCENE_MODE_PARTY = "party"; 677 public static final String SCENE_MODE_CANDLELIGHT = "candlelight"; 678 679 // Values for focus mode settings. 680 /** 681 * Auto-focus mode. 682 */ 683 public static final String FOCUS_MODE_AUTO = "auto"; 684 /** 685 * Focus is set at infinity. Applications should not call 686 * {@link #autoFocus(AutoFocusCallback)} in this mode. 687 */ 688 public static final String FOCUS_MODE_INFINITY = "infinity"; 689 public static final String FOCUS_MODE_MACRO = "macro"; 690 /** 691 * Focus is fixed. The camera is always in this mode if the focus is not 692 * adjustable. If the camera has auto-focus, this mode can fix the 693 * focus, which is usually at hyperfocal distance. Applications should 694 * not call {@link #autoFocus(AutoFocusCallback)} in this mode. 695 */ 696 public static final String FOCUS_MODE_FIXED = "fixed"; 697 698 // Formats for setPreviewFormat and setPictureFormat. 699 private static final String PIXEL_FORMAT_YUV422SP = "yuv422sp"; 700 private static final String PIXEL_FORMAT_YUV420SP = "yuv420sp"; 701 private static final String PIXEL_FORMAT_YUV422I = "yuv422i-yuyv"; 702 private static final String PIXEL_FORMAT_RGB565 = "rgb565"; 703 private static final String PIXEL_FORMAT_JPEG = "jpeg"; 704 705 private HashMap<String, String> mMap; 706 707 private Parameters() { 708 mMap = new HashMap<String, String>(); 709 } 710 711 /** 712 * Writes the current Parameters to the log. 713 * @hide 714 * @deprecated 715 */ 716 public void dump() { 717 Log.e(TAG, "dump: size=" + mMap.size()); 718 for (String k : mMap.keySet()) { 719 Log.e(TAG, "dump: " + k + "=" + mMap.get(k)); 720 } 721 } 722 723 /** 724 * Creates a single string with all the parameters set in 725 * this Parameters object. 726 * <p>The {@link #unflatten(String)} method does the reverse.</p> 727 * 728 * @return a String with all values from this Parameters object, in 729 * semi-colon delimited key-value pairs 730 */ 731 public String flatten() { 732 StringBuilder flattened = new StringBuilder(); 733 for (String k : mMap.keySet()) { 734 flattened.append(k); 735 flattened.append("="); 736 flattened.append(mMap.get(k)); 737 flattened.append(";"); 738 } 739 // chop off the extra semicolon at the end 740 flattened.deleteCharAt(flattened.length()-1); 741 return flattened.toString(); 742 } 743 744 /** 745 * Takes a flattened string of parameters and adds each one to 746 * this Parameters object. 747 * <p>The {@link #flatten()} method does the reverse.</p> 748 * 749 * @param flattened a String of parameters (key-value paired) that 750 * are semi-colon delimited 751 */ 752 public void unflatten(String flattened) { 753 mMap.clear(); 754 755 StringTokenizer tokenizer = new StringTokenizer(flattened, ";"); 756 while (tokenizer.hasMoreElements()) { 757 String kv = tokenizer.nextToken(); 758 int pos = kv.indexOf('='); 759 if (pos == -1) { 760 continue; 761 } 762 String k = kv.substring(0, pos); 763 String v = kv.substring(pos + 1); 764 mMap.put(k, v); 765 } 766 } 767 768 public void remove(String key) { 769 mMap.remove(key); 770 } 771 772 /** 773 * Sets a String parameter. 774 * 775 * @param key the key name for the parameter 776 * @param value the String value of the parameter 777 */ 778 public void set(String key, String value) { 779 if (key.indexOf('=') != -1 || key.indexOf(';') != -1) { 780 Log.e(TAG, "Key \"" + key + "\" contains invalid character (= or ;)"); 781 return; 782 } 783 if (value.indexOf('=') != -1 || value.indexOf(';') != -1) { 784 Log.e(TAG, "Value \"" + value + "\" contains invalid character (= or ;)"); 785 return; 786 } 787 788 mMap.put(key, value); 789 } 790 791 /** 792 * Sets an integer parameter. 793 * 794 * @param key the key name for the parameter 795 * @param value the int value of the parameter 796 */ 797 public void set(String key, int value) { 798 mMap.put(key, Integer.toString(value)); 799 } 800 801 /** 802 * Returns the value of a String parameter. 803 * 804 * @param key the key name for the parameter 805 * @return the String value of the parameter 806 */ 807 public String get(String key) { 808 return mMap.get(key); 809 } 810 811 /** 812 * Returns the value of an integer parameter. 813 * 814 * @param key the key name for the parameter 815 * @return the int value of the parameter 816 */ 817 public int getInt(String key) { 818 return Integer.parseInt(mMap.get(key)); 819 } 820 821 /** 822 * Sets the dimensions for preview pictures. 823 * 824 * @param width the width of the pictures, in pixels 825 * @param height the height of the pictures, in pixels 826 */ 827 public void setPreviewSize(int width, int height) { 828 String v = Integer.toString(width) + "x" + Integer.toString(height); 829 set(KEY_PREVIEW_SIZE, v); 830 } 831 832 /** 833 * Returns the dimensions setting for preview pictures. 834 * 835 * @return a Size object with the height and width setting 836 * for the preview picture 837 */ 838 public Size getPreviewSize() { 839 String pair = get(KEY_PREVIEW_SIZE); 840 return strToSize(pair); 841 } 842 843 /** 844 * Gets the supported preview sizes. 845 * 846 * @return a List of Size object. null if preview size setting is not 847 * supported. 848 */ 849 public List<Size> getSupportedPreviewSizes() { 850 String str = get(KEY_PREVIEW_SIZE + SUPPORTED_VALUES_SUFFIX); 851 return splitSize(str); 852 } 853 854 /** 855 * Sets the dimensions for EXIF thumbnail in Jpeg picture. 856 * 857 * @param width the width of the thumbnail, in pixels 858 * @param height the height of the thumbnail, in pixels 859 */ 860 public void setJpegThumbnailSize(int width, int height) { 861 set(KEY_JPEG_THUMBNAIL_WIDTH, width); 862 set(KEY_JPEG_THUMBNAIL_HEIGHT, height); 863 } 864 865 /** 866 * Returns the dimensions for EXIF thumbnail in Jpeg picture. 867 * 868 * @return a Size object with the height and width setting for the EXIF 869 * thumbnails 870 */ 871 public Size getJpegThumbnailSize() { 872 return new Size(getInt(KEY_JPEG_THUMBNAIL_WIDTH), 873 getInt(KEY_JPEG_THUMBNAIL_HEIGHT)); 874 } 875 876 /** 877 * Sets the quality of the EXIF thumbnail in Jpeg picture. 878 * 879 * @param quality the JPEG quality of the EXIF thumbnail. The range is 1 880 * to 100, with 100 being the best. 881 */ 882 public void setJpegThumbnailQuality(int quality) { 883 set(KEY_JPEG_THUMBNAIL_QUALITY, quality); 884 } 885 886 /** 887 * Returns the quality setting for the EXIF thumbnail in Jpeg picture. 888 * 889 * @return the JPEG quality setting of the EXIF thumbnail. 890 */ 891 public int getJpegThumbnailQuality() { 892 return getInt(KEY_JPEG_THUMBNAIL_QUALITY); 893 } 894 895 /** 896 * Sets Jpeg quality of captured picture. 897 * 898 * @param quality the JPEG quality of captured picture. The range is 1 899 * to 100, with 100 being the best. 900 */ 901 public void setJpegQuality(int quality) { 902 set(KEY_JPEG_QUALITY, quality); 903 } 904 905 /** 906 * Returns the quality setting for the JPEG picture. 907 * 908 * @return the JPEG picture quality setting. 909 */ 910 public int getJpegQuality() { 911 return getInt(KEY_JPEG_QUALITY); 912 } 913 914 /** 915 * Sets the rate at which preview frames are received. 916 * 917 * @param fps the frame rate (frames per second) 918 */ 919 public void setPreviewFrameRate(int fps) { 920 set(KEY_PREVIEW_FRAME_RATE, fps); 921 } 922 923 /** 924 * Returns the setting for the rate at which preview frames 925 * are received. 926 * 927 * @return the frame rate setting (frames per second) 928 */ 929 public int getPreviewFrameRate() { 930 return getInt(KEY_PREVIEW_FRAME_RATE); 931 } 932 933 /** 934 * Gets the supported preview frame rates. 935 * 936 * @return a List of Integer objects (preview frame rates). null if 937 * preview frame rate setting is not supported. 938 */ 939 public List<Integer> getSupportedPreviewFrameRates() { 940 String str = get(KEY_PREVIEW_FRAME_RATE + SUPPORTED_VALUES_SUFFIX); 941 return splitInt(str); 942 } 943 944 /** 945 * Sets the image format for preview pictures. 946 * <p>If this is never called, the default format will be 947 * {@link android.graphics.PixelFormat#YCbCr_420_SP}, which 948 * uses the NV21 encoding format.</p> 949 * 950 * @param pixel_format the desired preview picture format, defined 951 * by one of the {@link android.graphics.PixelFormat} constants. 952 * (E.g., <var>PixelFormat.YCbCr_420_SP</var> (default), 953 * <var>PixelFormat.RGB_565</var>, or 954 * <var>PixelFormat.JPEG</var>) 955 * @see android.graphics.PixelFormat 956 */ 957 public void setPreviewFormat(int pixel_format) { 958 String s = cameraFormatForPixelFormat(pixel_format); 959 if (s == null) { 960 throw new IllegalArgumentException( 961 "Invalid pixel_format=" + pixel_format); 962 } 963 964 set(KEY_PREVIEW_FORMAT, s); 965 } 966 967 /** 968 * Returns the image format for preview pictures got from 969 * {@link PreviewCallback}. 970 * 971 * @return the {@link android.graphics.PixelFormat} int representing 972 * the preview picture format. 973 */ 974 public int getPreviewFormat() { 975 return pixelFormatForCameraFormat(get(KEY_PREVIEW_FORMAT)); 976 } 977 978 /** 979 * Gets the supported preview formats. 980 * 981 * @return a List of Integer objects. null if preview format setting is 982 * not supported. 983 */ 984 public List<Integer> getSupportedPreviewFormats() { 985 String str = get(KEY_PREVIEW_FORMAT + SUPPORTED_VALUES_SUFFIX); 986 ArrayList<Integer> formats = new ArrayList<Integer>(); 987 for (String s : split(str)) { 988 int f = pixelFormatForCameraFormat(s); 989 if (f == PixelFormat.UNKNOWN) continue; 990 formats.add(f); 991 } 992 return formats; 993 } 994 995 /** 996 * Sets the dimensions for pictures. 997 * 998 * @param width the width for pictures, in pixels 999 * @param height the height for pictures, in pixels 1000 */ 1001 public void setPictureSize(int width, int height) { 1002 String v = Integer.toString(width) + "x" + Integer.toString(height); 1003 set(KEY_PICTURE_SIZE, v); 1004 } 1005 1006 /** 1007 * Returns the dimension setting for pictures. 1008 * 1009 * @return a Size object with the height and width setting 1010 * for pictures 1011 */ 1012 public Size getPictureSize() { 1013 String pair = get(KEY_PICTURE_SIZE); 1014 return strToSize(pair); 1015 } 1016 1017 /** 1018 * Gets the supported picture sizes. 1019 * 1020 * @return a List of Size objects. null if picture size setting is not 1021 * supported. 1022 */ 1023 public List<Size> getSupportedPictureSizes() { 1024 String str = get(KEY_PICTURE_SIZE + SUPPORTED_VALUES_SUFFIX); 1025 return splitSize(str); 1026 } 1027 1028 /** 1029 * Sets the image format for pictures. 1030 * 1031 * @param pixel_format the desired picture format 1032 * (<var>PixelFormat.YCbCr_420_SP (NV21)</var>, 1033 * <var>PixelFormat.RGB_565</var>, or 1034 * <var>PixelFormat.JPEG</var>) 1035 * @see android.graphics.PixelFormat 1036 */ 1037 public void setPictureFormat(int pixel_format) { 1038 String s = cameraFormatForPixelFormat(pixel_format); 1039 if (s == null) { 1040 throw new IllegalArgumentException( 1041 "Invalid pixel_format=" + pixel_format); 1042 } 1043 1044 set(KEY_PICTURE_FORMAT, s); 1045 } 1046 1047 /** 1048 * Returns the image format for pictures. 1049 * 1050 * @return the PixelFormat int representing the picture format 1051 */ 1052 public int getPictureFormat() { 1053 return pixelFormatForCameraFormat(get(KEY_PICTURE_FORMAT)); 1054 } 1055 1056 /** 1057 * Gets the supported picture formats. 1058 * 1059 * @return a List of Integer objects (values are PixelFormat.XXX). null 1060 * if picture setting is not supported. 1061 */ 1062 public List<Integer> getSupportedPictureFormats() { 1063 String str = get(KEY_PICTURE_SIZE + SUPPORTED_VALUES_SUFFIX); 1064 return splitInt(str); 1065 } 1066 1067 private String cameraFormatForPixelFormat(int pixel_format) { 1068 switch(pixel_format) { 1069 case PixelFormat.YCbCr_422_SP: return PIXEL_FORMAT_YUV422SP; 1070 case PixelFormat.YCbCr_420_SP: return PIXEL_FORMAT_YUV420SP; 1071 case PixelFormat.YCbCr_422_I: return PIXEL_FORMAT_YUV422I; 1072 case PixelFormat.RGB_565: return PIXEL_FORMAT_RGB565; 1073 case PixelFormat.JPEG: return PIXEL_FORMAT_JPEG; 1074 default: return null; 1075 } 1076 } 1077 1078 private int pixelFormatForCameraFormat(String format) { 1079 if (format == null) 1080 return PixelFormat.UNKNOWN; 1081 1082 if (format.equals(PIXEL_FORMAT_YUV422SP)) 1083 return PixelFormat.YCbCr_422_SP; 1084 1085 if (format.equals(PIXEL_FORMAT_YUV420SP)) 1086 return PixelFormat.YCbCr_420_SP; 1087 1088 if (format.equals(PIXEL_FORMAT_YUV422I)) 1089 return PixelFormat.YCbCr_422_I; 1090 1091 if (format.equals(PIXEL_FORMAT_RGB565)) 1092 return PixelFormat.RGB_565; 1093 1094 if (format.equals(PIXEL_FORMAT_JPEG)) 1095 return PixelFormat.JPEG; 1096 1097 return PixelFormat.UNKNOWN; 1098 } 1099 1100 /** 1101 * Sets the orientation of the device in degrees. For example, suppose 1102 * the natural position of the device is landscape. If the user takes a 1103 * picture in landscape mode in 2048x1536 resolution, the rotation 1104 * should be set to 0. If the user rotates the phone 90 degrees 1105 * clockwise, the rotation should be set to 90. Applications can use 1106 * {@link android.view.OrientationEventListener} to set this parameter. 1107 * 1108 * The camera driver may set orientation in the EXIF header without 1109 * rotating the picture. Or the driver may rotate the picture and 1110 * the EXIF thumbnail. If the Jpeg picture is rotated, the orientation 1111 * in the EXIF header will be missing or 1 (row #0 is top and column #0 1112 * is left side). 1113 * 1114 * @param rotation The orientation of the device in degrees. Rotation 1115 * can only be 0, 90, 180 or 270. 1116 * @throws IllegalArgumentException if rotation value is invalid. 1117 * @see android.view.OrientationEventListener 1118 */ 1119 public void setRotation(int rotation) { 1120 if (rotation == 0 || rotation == 90 || rotation == 180 1121 || rotation == 270) { 1122 set(KEY_ROTATION, Integer.toString(rotation)); 1123 } else { 1124 throw new IllegalArgumentException( 1125 "Invalid rotation=" + rotation); 1126 } 1127 } 1128 1129 /** 1130 * Sets GPS latitude coordinate. This will be stored in JPEG EXIF 1131 * header. 1132 * 1133 * @param latitude GPS latitude coordinate. 1134 */ 1135 public void setGpsLatitude(double latitude) { 1136 set(KEY_GPS_LATITUDE, Double.toString(latitude)); 1137 } 1138 1139 /** 1140 * Sets GPS longitude coordinate. This will be stored in JPEG EXIF 1141 * header. 1142 * 1143 * @param longitude GPS longitude coordinate. 1144 */ 1145 public void setGpsLongitude(double longitude) { 1146 set(KEY_GPS_LONGITUDE, Double.toString(longitude)); 1147 } 1148 1149 /** 1150 * Sets GPS altitude. This will be stored in JPEG EXIF header. 1151 * 1152 * @param altitude GPS altitude in meters. 1153 */ 1154 public void setGpsAltitude(double altitude) { 1155 set(KEY_GPS_ALTITUDE, Double.toString(altitude)); 1156 } 1157 1158 /** 1159 * Sets GPS timestamp. This will be stored in JPEG EXIF header. 1160 * 1161 * @param timestamp GPS timestamp (UTC in seconds since January 1, 1162 * 1970). 1163 */ 1164 public void setGpsTimestamp(long timestamp) { 1165 set(KEY_GPS_TIMESTAMP, Long.toString(timestamp)); 1166 } 1167 1168 /** 1169 * Removes GPS latitude, longitude, altitude, and timestamp from the 1170 * parameters. 1171 */ 1172 public void removeGpsData() { 1173 remove(KEY_GPS_LATITUDE); 1174 remove(KEY_GPS_LONGITUDE); 1175 remove(KEY_GPS_ALTITUDE); 1176 remove(KEY_GPS_TIMESTAMP); 1177 } 1178 1179 /** 1180 * Gets the current white balance setting. 1181 * 1182 * @return one of WHITE_BALANCE_XXX string constant. null if white 1183 * balance setting is not supported. 1184 */ 1185 public String getWhiteBalance() { 1186 return get(KEY_WHITE_BALANCE); 1187 } 1188 1189 /** 1190 * Sets the white balance. 1191 * 1192 * @param value WHITE_BALANCE_XXX string constant. 1193 */ 1194 public void setWhiteBalance(String value) { 1195 set(KEY_WHITE_BALANCE, value); 1196 } 1197 1198 /** 1199 * Gets the supported white balance. 1200 * 1201 * @return a List of WHITE_BALANCE_XXX string constants. null if white 1202 * balance setting is not supported. 1203 */ 1204 public List<String> getSupportedWhiteBalance() { 1205 String str = get(KEY_WHITE_BALANCE + SUPPORTED_VALUES_SUFFIX); 1206 return split(str); 1207 } 1208 1209 /** 1210 * Gets the current color effect setting. 1211 * 1212 * @return one of EFFECT_XXX string constant. null if color effect 1213 * setting is not supported. 1214 */ 1215 public String getColorEffect() { 1216 return get(KEY_EFFECT); 1217 } 1218 1219 /** 1220 * Sets the current color effect setting. 1221 * 1222 * @param value EFFECT_XXX string constants. 1223 */ 1224 public void setColorEffect(String value) { 1225 set(KEY_EFFECT, value); 1226 } 1227 1228 /** 1229 * Gets the supported color effects. 1230 * 1231 * @return a List of EFFECT_XXX string constants. null if color effect 1232 * setting is not supported. 1233 */ 1234 public List<String> getSupportedColorEffects() { 1235 String str = get(KEY_EFFECT + SUPPORTED_VALUES_SUFFIX); 1236 return split(str); 1237 } 1238 1239 1240 /** 1241 * Gets the current antibanding setting. 1242 * 1243 * @return one of ANTIBANDING_XXX string constant. null if antibanding 1244 * setting is not supported. 1245 */ 1246 public String getAntibanding() { 1247 return get(KEY_ANTIBANDING); 1248 } 1249 1250 /** 1251 * Sets the antibanding. 1252 * 1253 * @param antibanding ANTIBANDING_XXX string constant. 1254 */ 1255 public void setAntibanding(String antibanding) { 1256 set(KEY_ANTIBANDING, antibanding); 1257 } 1258 1259 /** 1260 * Gets the supported antibanding values. 1261 * 1262 * @return a List of ANTIBANDING_XXX string constants. null if 1263 * antibanding setting is not supported. 1264 */ 1265 public List<String> getSupportedAntibanding() { 1266 String str = get(KEY_ANTIBANDING + SUPPORTED_VALUES_SUFFIX); 1267 return split(str); 1268 } 1269 1270 /** 1271 * Gets the current scene mode setting. 1272 * 1273 * @return one of SCENE_MODE_XXX string constant. null if scene mode 1274 * setting is not supported. 1275 */ 1276 public String getSceneMode() { 1277 return get(KEY_SCENE_MODE); 1278 } 1279 1280 /** 1281 * Sets the scene mode. 1282 * 1283 * @param value SCENE_MODE_XXX string constants. 1284 */ 1285 public void setSceneMode(String value) { 1286 set(KEY_SCENE_MODE, value); 1287 } 1288 1289 /** 1290 * Gets the supported scene modes. 1291 * 1292 * @return a List of SCENE_MODE_XXX string constant. null if scene mode 1293 * setting is not supported. 1294 */ 1295 public List<String> getSupportedSceneModes() { 1296 String str = get(KEY_SCENE_MODE + SUPPORTED_VALUES_SUFFIX); 1297 return split(str); 1298 } 1299 1300 /** 1301 * Gets the current flash mode setting. 1302 * 1303 * @return one of FLASH_MODE_XXX string constant. null if flash mode 1304 * setting is not supported. 1305 */ 1306 public String getFlashMode() { 1307 return get(KEY_FLASH_MODE); 1308 } 1309 1310 /** 1311 * Sets the flash mode. 1312 * 1313 * @param value FLASH_MODE_XXX string constants. 1314 */ 1315 public void setFlashMode(String value) { 1316 set(KEY_FLASH_MODE, value); 1317 } 1318 1319 /** 1320 * Gets the supported flash modes. 1321 * 1322 * @return a List of FLASH_MODE_XXX string constants. null if flash mode 1323 * setting is not supported. 1324 */ 1325 public List<String> getSupportedFlashModes() { 1326 String str = get(KEY_FLASH_MODE + SUPPORTED_VALUES_SUFFIX); 1327 return split(str); 1328 } 1329 1330 /** 1331 * Gets the current focus mode setting. 1332 * 1333 * @return one of FOCUS_MODE_XXX string constant. If the camera does not 1334 * support auto-focus, this should return {@link 1335 * #FOCUS_MODE_FIXED}. If the focus mode is not FOCUS_MODE_FIXED 1336 * or {@link #FOCUS_MODE_INFINITY}, applications should call 1337 * {@link #autoFocus(AutoFocusCallback)} to start the focus. 1338 */ 1339 public String getFocusMode() { 1340 return get(KEY_FOCUS_MODE); 1341 } 1342 1343 /** 1344 * Sets the focus mode. 1345 * 1346 * @param value FOCUS_MODE_XXX string constants. 1347 */ 1348 public void setFocusMode(String value) { 1349 set(KEY_FOCUS_MODE, value); 1350 } 1351 1352 /** 1353 * Gets the supported focus modes. 1354 * 1355 * @return a List of FOCUS_MODE_XXX string constants. null if focus mode 1356 * setting is not supported. 1357 */ 1358 public List<String> getSupportedFocusModes() { 1359 String str = get(KEY_FOCUS_MODE + SUPPORTED_VALUES_SUFFIX); 1360 return split(str); 1361 } 1362 1363 // Splits a comma delimited string to an ArrayList of String. 1364 // Return null if the passing string is null or the size is 0. 1365 private ArrayList<String> split(String str) { 1366 if (str == null) return null; 1367 1368 // Use StringTokenizer because it is faster than split. 1369 StringTokenizer tokenizer = new StringTokenizer(str, ","); 1370 ArrayList<String> substrings = new ArrayList<String>(); 1371 while (tokenizer.hasMoreElements()) { 1372 substrings.add(tokenizer.nextToken()); 1373 } 1374 return substrings; 1375 } 1376 1377 // Splits a comma delimited string to an ArrayList of Integer. 1378 // Return null if the passing string is null or the size is 0. 1379 private ArrayList<Integer> splitInt(String str) { 1380 if (str == null) return null; 1381 1382 StringTokenizer tokenizer = new StringTokenizer(str, ","); 1383 ArrayList<Integer> substrings = new ArrayList<Integer>(); 1384 while (tokenizer.hasMoreElements()) { 1385 String token = tokenizer.nextToken(); 1386 substrings.add(Integer.parseInt(token)); 1387 } 1388 if (substrings.size() == 0) return null; 1389 return substrings; 1390 } 1391 1392 // Splits a comma delimited string to an ArrayList of Size. 1393 // Return null if the passing string is null or the size is 0. 1394 private ArrayList<Size> splitSize(String str) { 1395 if (str == null) return null; 1396 1397 StringTokenizer tokenizer = new StringTokenizer(str, ","); 1398 ArrayList<Size> sizeList = new ArrayList<Size>(); 1399 while (tokenizer.hasMoreElements()) { 1400 Size size = strToSize(tokenizer.nextToken()); 1401 if (size != null) sizeList.add(size); 1402 } 1403 if (sizeList.size() == 0) return null; 1404 return sizeList; 1405 } 1406 1407 // Parses a string (ex: "480x320") to Size object. 1408 // Return null if the passing string is null. 1409 private Size strToSize(String str) { 1410 if (str == null) return null; 1411 1412 int pos = str.indexOf('x'); 1413 if (pos != -1) { 1414 String width = str.substring(0, pos); 1415 String height = str.substring(pos + 1); 1416 return new Size(Integer.parseInt(width), 1417 Integer.parseInt(height)); 1418 } 1419 Log.e(TAG, "Invalid size parameter string=" + str); 1420 return null; 1421 } 1422 }; 1423} 1424