1 /* 2 * Copyright (C) 2009 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 17 package android.app; 18 19 import android.content.Context; 20 import android.content.Intent; 21 import android.content.res.Resources; 22 import android.graphics.Bitmap; 23 import android.graphics.BitmapFactory; 24 import android.graphics.Canvas; 25 import android.graphics.ColorFilter; 26 import android.graphics.Paint; 27 import android.graphics.PixelFormat; 28 import android.graphics.PorterDuff; 29 import android.graphics.PorterDuffXfermode; 30 import android.graphics.Rect; 31 import android.graphics.drawable.BitmapDrawable; 32 import android.graphics.drawable.Drawable; 33 import android.os.Bundle; 34 import android.os.Handler; 35 import android.os.IBinder; 36 import android.os.Looper; 37 import android.os.Message; 38 import android.os.ParcelFileDescriptor; 39 import android.os.RemoteException; 40 import android.os.ServiceManager; 41 import android.util.DisplayMetrics; 42 import android.util.Log; 43 import android.view.ViewRootImpl; 44 45 import java.io.FileOutputStream; 46 import java.io.IOException; 47 import java.io.InputStream; 48 49 /** 50 * Provides access to the system wallpaper. With WallpaperManager, you can 51 * get the current wallpaper, get the desired dimensions for the wallpaper, set 52 * the wallpaper, and more. Get an instance of WallpaperManager with 53 * {@link #getInstance(android.content.Context) getInstance()}. 54 */ 55 public class WallpaperManager { 56 private static String TAG = "WallpaperManager"; 57 private static boolean DEBUG = false; 58 private float mWallpaperXStep = -1; 59 private float mWallpaperYStep = -1; 60 61 /** 62 * Launch an activity for the user to pick the current global live 63 * wallpaper. 64 */ 65 public static final String ACTION_LIVE_WALLPAPER_CHOOSER 66 = "android.service.wallpaper.LIVE_WALLPAPER_CHOOSER"; 67 68 /** 69 * Manifest entry for activities that respond to {@link Intent#ACTION_SET_WALLPAPER} 70 * which allows them to provide a custom large icon associated with this action. 71 */ 72 public static final String WALLPAPER_PREVIEW_META_DATA = "android.wallpaper.preview"; 73 74 /** 75 * Command for {@link #sendWallpaperCommand}: reported by the wallpaper 76 * host when the user taps on an empty area (not performing an action 77 * in the host). The x and y arguments are the location of the tap in 78 * screen coordinates. 79 */ 80 public static final String COMMAND_TAP = "android.wallpaper.tap"; 81 82 /** 83 * Command for {@link #sendWallpaperCommand}: reported by the wallpaper 84 * host when the user releases a secondary pointer on an empty area 85 * (not performing an action in the host). The x and y arguments are 86 * the location of the secondary tap in screen coordinates. 87 */ 88 public static final String COMMAND_SECONDARY_TAP = "android.wallpaper.secondaryTap"; 89 90 /** 91 * Command for {@link #sendWallpaperCommand}: reported by the wallpaper 92 * host when the user drops an object into an area of the host. The x 93 * and y arguments are the location of the drop. 94 */ 95 public static final String COMMAND_DROP = "android.home.drop"; 96 97 private final Context mContext; 98 99 /** 100 * Special drawable that draws a wallpaper as fast as possible. Assumes 101 * no scaling or placement off (0,0) of the wallpaper (this should be done 102 * at the time the bitmap is loaded). 103 */ 104 static class FastBitmapDrawable extends Drawable { 105 private final Bitmap mBitmap; 106 private final int mWidth; 107 private final int mHeight; 108 private int mDrawLeft; 109 private int mDrawTop; 110 private final Paint mPaint; 111 112 private FastBitmapDrawable(Bitmap bitmap) { 113 mBitmap = bitmap; 114 mWidth = bitmap.getWidth(); 115 mHeight = bitmap.getHeight(); 116 117 setBounds(0, 0, mWidth, mHeight); 118 119 mPaint = new Paint(); 120 mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC)); 121 } 122 123 @Override 124 public void draw(Canvas canvas) { 125 canvas.drawBitmap(mBitmap, mDrawLeft, mDrawTop, mPaint); 126 } 127 128 @Override 129 public int getOpacity() { 130 return PixelFormat.OPAQUE; 131 } 132 133 @Override 134 public void setBounds(int left, int top, int right, int bottom) { 135 mDrawLeft = left + (right-left - mWidth) / 2; 136 mDrawTop = top + (bottom-top - mHeight) / 2; 137 } 138 139 @Override 140 public void setAlpha(int alpha) { 141 throw new UnsupportedOperationException("Not supported with this drawable"); 142 } 143 144 @Override 145 public void setColorFilter(ColorFilter cf) { 146 throw new UnsupportedOperationException("Not supported with this drawable"); 147 } 148 149 @Override 150 public void setDither(boolean dither) { 151 throw new UnsupportedOperationException("Not supported with this drawable"); 152 } 153 154 @Override 155 public void setFilterBitmap(boolean filter) { 156 throw new UnsupportedOperationException("Not supported with this drawable"); 157 } 158 159 @Override 160 public int getIntrinsicWidth() { 161 return mWidth; 162 } 163 164 @Override 165 public int getIntrinsicHeight() { 166 return mHeight; 167 } 168 169 @Override 170 public int getMinimumWidth() { 171 return mWidth; 172 } 173 174 @Override 175 public int getMinimumHeight() { 176 return mHeight; 177 } 178 } 179 180 static class Globals extends IWallpaperManagerCallback.Stub { 181 private IWallpaperManager mService; 182 private Bitmap mWallpaper; 183 private Bitmap mDefaultWallpaper; 184 185 private static final int MSG_CLEAR_WALLPAPER = 1; 186 187 private final Handler mHandler; 188 189 Globals(Looper looper) { 190 IBinder b = ServiceManager.getService(Context.WALLPAPER_SERVICE); 191 mService = IWallpaperManager.Stub.asInterface(b); 192 mHandler = new Handler(looper) { 193 @Override 194 public void handleMessage(Message msg) { 195 switch (msg.what) { 196 case MSG_CLEAR_WALLPAPER: 197 synchronized (this) { 198 mWallpaper = null; 199 mDefaultWallpaper = null; 200 } 201 break; 202 } 203 } 204 }; 205 } 206 207 public void onWallpaperChanged() { 208 /* The wallpaper has changed but we shouldn't eagerly load the 209 * wallpaper as that would be inefficient. Reset the cached wallpaper 210 * to null so if the user requests the wallpaper again then we'll 211 * fetch it. 212 */ 213 mHandler.sendEmptyMessage(MSG_CLEAR_WALLPAPER); 214 } 215 216 public Bitmap peekWallpaperBitmap(Context context, boolean returnDefault) { 217 synchronized (this) { 218 if (mWallpaper != null) { 219 return mWallpaper; 220 } 221 if (mDefaultWallpaper != null) { 222 return mDefaultWallpaper; 223 } 224 mWallpaper = null; 225 try { 226 mWallpaper = getCurrentWallpaperLocked(); 227 } catch (OutOfMemoryError e) { 228 Log.w(TAG, "No memory load current wallpaper", e); 229 } 230 if (returnDefault) { 231 if (mWallpaper == null) { 232 mDefaultWallpaper = getDefaultWallpaperLocked(context); 233 return mDefaultWallpaper; 234 } else { 235 mDefaultWallpaper = null; 236 } 237 } 238 return mWallpaper; 239 } 240 } 241 242 public void forgetLoadedWallpaper() { 243 synchronized (this) { 244 mWallpaper = null; 245 mDefaultWallpaper = null; 246 } 247 } 248 249 private Bitmap getCurrentWallpaperLocked() { 250 try { 251 Bundle params = new Bundle(); 252 ParcelFileDescriptor fd = mService.getWallpaper(this, params); 253 if (fd != null) { 254 int width = params.getInt("width", 0); 255 int height = params.getInt("height", 0); 256 257 try { 258 BitmapFactory.Options options = new BitmapFactory.Options(); 259 Bitmap bm = BitmapFactory.decodeFileDescriptor( 260 fd.getFileDescriptor(), null, options); 261 return generateBitmap(bm, width, height); 262 } catch (OutOfMemoryError e) { 263 Log.w(TAG, "Can't decode file", e); 264 } finally { 265 try { 266 fd.close(); 267 } catch (IOException e) { 268 // Ignore 269 } 270 } 271 } 272 } catch (RemoteException e) { 273 // Ignore 274 } 275 return null; 276 } 277 278 private Bitmap getDefaultWallpaperLocked(Context context) { 279 try { 280 InputStream is = context.getResources().openRawResource( 281 com.android.internal.R.drawable.default_wallpaper); 282 if (is != null) { 283 int width = mService.getWidthHint(); 284 int height = mService.getHeightHint(); 285 286 try { 287 BitmapFactory.Options options = new BitmapFactory.Options(); 288 Bitmap bm = BitmapFactory.decodeStream(is, null, options); 289 return generateBitmap(bm, width, height); 290 } catch (OutOfMemoryError e) { 291 Log.w(TAG, "Can't decode stream", e); 292 } finally { 293 try { 294 is.close(); 295 } catch (IOException e) { 296 // Ignore 297 } 298 } 299 } 300 } catch (RemoteException e) { 301 // Ignore 302 } 303 return null; 304 } 305 } 306 307 private static final Object sSync = new Object[0]; 308 private static Globals sGlobals; 309 310 static void initGlobals(Looper looper) { 311 synchronized (sSync) { 312 if (sGlobals == null) { 313 sGlobals = new Globals(looper); 314 } 315 } 316 } 317 318 /*package*/ WallpaperManager(Context context, Handler handler) { 319 mContext = context; 320 initGlobals(context.getMainLooper()); 321 } 322 323 /** 324 * Retrieve a WallpaperManager associated with the given Context. 325 */ 326 public static WallpaperManager getInstance(Context context) { 327 return (WallpaperManager)context.getSystemService( 328 Context.WALLPAPER_SERVICE); 329 } 330 331 /** @hide */ 332 public IWallpaperManager getIWallpaperManager() { 333 return sGlobals.mService; 334 } 335 336 /** 337 * Retrieve the current system wallpaper; if 338 * no wallpaper is set, the system default wallpaper is returned. 339 * This is returned as an 340 * abstract Drawable that you can install in a View to display whatever 341 * wallpaper the user has currently set. 342 * 343 * @return Returns a Drawable object that will draw the wallpaper. 344 */ 345 public Drawable getDrawable() { 346 Bitmap bm = sGlobals.peekWallpaperBitmap(mContext, true); 347 if (bm != null) { 348 Drawable dr = new BitmapDrawable(mContext.getResources(), bm); 349 dr.setDither(false); 350 return dr; 351 } 352 return null; 353 } 354 355 /** 356 * Retrieve the current system wallpaper; if there is no wallpaper set, 357 * a null pointer is returned. This is returned as an 358 * abstract Drawable that you can install in a View to display whatever 359 * wallpaper the user has currently set. 360 * 361 * @return Returns a Drawable object that will draw the wallpaper or a 362 * null pointer if these is none. 363 */ 364 public Drawable peekDrawable() { 365 Bitmap bm = sGlobals.peekWallpaperBitmap(mContext, false); 366 if (bm != null) { 367 Drawable dr = new BitmapDrawable(mContext.getResources(), bm); 368 dr.setDither(false); 369 return dr; 370 } 371 return null; 372 } 373 374 /** 375 * Like {@link #getDrawable()}, but the returned Drawable has a number 376 * of limitations to reduce its overhead as much as possible. It will 377 * never scale the wallpaper (only centering it if the requested bounds 378 * do match the bitmap bounds, which should not be typical), doesn't 379 * allow setting an alpha, color filter, or other attributes, etc. The 380 * bounds of the returned drawable will be initialized to the same bounds 381 * as the wallpaper, so normally you will not need to touch it. The 382 * drawable also assumes that it will be used in a context running in 383 * the same density as the screen (not in density compatibility mode). 384 * 385 * @return Returns a Drawable object that will draw the wallpaper. 386 */ 387 public Drawable getFastDrawable() { 388 Bitmap bm = sGlobals.peekWallpaperBitmap(mContext, true); 389 if (bm != null) { 390 return new FastBitmapDrawable(bm); 391 } 392 return null; 393 } 394 395 /** 396 * Like {@link #getFastDrawable()}, but if there is no wallpaper set, 397 * a null pointer is returned. 398 * 399 * @return Returns an optimized Drawable object that will draw the 400 * wallpaper or a null pointer if these is none. 401 */ 402 public Drawable peekFastDrawable() { 403 Bitmap bm = sGlobals.peekWallpaperBitmap(mContext, false); 404 if (bm != null) { 405 return new FastBitmapDrawable(bm); 406 } 407 return null; 408 } 409 410 /** 411 * Like {@link #getDrawable()} but returns a Bitmap. 412 * 413 * @hide 414 */ 415 public Bitmap getBitmap() { 416 return sGlobals.peekWallpaperBitmap(mContext, true); 417 } 418 419 /** 420 * Remove all internal references to the last loaded wallpaper. Useful 421 * for apps that want to reduce memory usage when they only temporarily 422 * need to have the wallpaper. After calling, the next request for the 423 * wallpaper will require reloading it again from disk. 424 */ 425 public void forgetLoadedWallpaper() { 426 sGlobals.forgetLoadedWallpaper(); 427 } 428 429 /** 430 * If the current wallpaper is a live wallpaper component, return the 431 * information about that wallpaper. Otherwise, if it is a static image, 432 * simply return null. 433 */ 434 public WallpaperInfo getWallpaperInfo() { 435 try { 436 return sGlobals.mService.getWallpaperInfo(); 437 } catch (RemoteException e) { 438 return null; 439 } 440 } 441 442 /** 443 * Change the current system wallpaper to the bitmap in the given resource. 444 * The resource is opened as a raw data stream and copied into the 445 * wallpaper; it must be a valid PNG or JPEG image. On success, the intent 446 * {@link Intent#ACTION_WALLPAPER_CHANGED} is broadcast. 447 * 448 * @param resid The bitmap to save. 449 * 450 * @throws IOException If an error occurs reverting to the default 451 * wallpaper. 452 */ 453 public void setResource(int resid) throws IOException { 454 try { 455 Resources resources = mContext.getResources(); 456 /* Set the wallpaper to the default values */ 457 ParcelFileDescriptor fd = sGlobals.mService.setWallpaper( 458 "res:" + resources.getResourceName(resid)); 459 if (fd != null) { 460 FileOutputStream fos = null; 461 try { 462 fos = new ParcelFileDescriptor.AutoCloseOutputStream(fd); 463 setWallpaper(resources.openRawResource(resid), fos); 464 } finally { 465 if (fos != null) { 466 fos.close(); 467 } 468 } 469 } 470 } catch (RemoteException e) { 471 // Ignore 472 } 473 } 474 475 /** 476 * Change the current system wallpaper to a bitmap. The given bitmap is 477 * converted to a PNG and stored as the wallpaper. On success, the intent 478 * {@link Intent#ACTION_WALLPAPER_CHANGED} is broadcast. 479 * 480 * @param bitmap The bitmap to save. 481 * 482 * @throws IOException If an error occurs reverting to the default 483 * wallpaper. 484 */ 485 public void setBitmap(Bitmap bitmap) throws IOException { 486 try { 487 ParcelFileDescriptor fd = sGlobals.mService.setWallpaper(null); 488 if (fd == null) { 489 return; 490 } 491 FileOutputStream fos = null; 492 try { 493 fos = new ParcelFileDescriptor.AutoCloseOutputStream(fd); 494 bitmap.compress(Bitmap.CompressFormat.PNG, 90, fos); 495 } finally { 496 if (fos != null) { 497 fos.close(); 498 } 499 } 500 } catch (RemoteException e) { 501 // Ignore 502 } 503 } 504 505 /** 506 * Change the current system wallpaper to a specific byte stream. The 507 * give InputStream is copied into persistent storage and will now be 508 * used as the wallpaper. Currently it must be either a JPEG or PNG 509 * image. On success, the intent {@link Intent#ACTION_WALLPAPER_CHANGED} 510 * is broadcast. 511 * 512 * @param data A stream containing the raw data to install as a wallpaper. 513 * 514 * @throws IOException If an error occurs reverting to the default 515 * wallpaper. 516 */ 517 public void setStream(InputStream data) throws IOException { 518 try { 519 ParcelFileDescriptor fd = sGlobals.mService.setWallpaper(null); 520 if (fd == null) { 521 return; 522 } 523 FileOutputStream fos = null; 524 try { 525 fos = new ParcelFileDescriptor.AutoCloseOutputStream(fd); 526 setWallpaper(data, fos); 527 } finally { 528 if (fos != null) { 529 fos.close(); 530 } 531 } 532 } catch (RemoteException e) { 533 // Ignore 534 } 535 } 536 537 private void setWallpaper(InputStream data, FileOutputStream fos) 538 throws IOException { 539 byte[] buffer = new byte[32768]; 540 int amt; 541 while ((amt=data.read(buffer)) > 0) { 542 fos.write(buffer, 0, amt); 543 } 544 } 545 546 /** 547 * Returns the desired minimum width for the wallpaper. Callers of 548 * {@link #setBitmap(android.graphics.Bitmap)} or 549 * {@link #setStream(java.io.InputStream)} should check this value 550 * beforehand to make sure the supplied wallpaper respects the desired 551 * minimum width. 552 * 553 * If the returned value is <= 0, the caller should use the width of 554 * the default display instead. 555 * 556 * @return The desired minimum width for the wallpaper. This value should 557 * be honored by applications that set the wallpaper but it is not 558 * mandatory. 559 */ 560 public int getDesiredMinimumWidth() { 561 try { 562 return sGlobals.mService.getWidthHint(); 563 } catch (RemoteException e) { 564 // Shouldn't happen! 565 return 0; 566 } 567 } 568 569 /** 570 * Returns the desired minimum height for the wallpaper. Callers of 571 * {@link #setBitmap(android.graphics.Bitmap)} or 572 * {@link #setStream(java.io.InputStream)} should check this value 573 * beforehand to make sure the supplied wallpaper respects the desired 574 * minimum height. 575 * 576 * If the returned value is <= 0, the caller should use the height of 577 * the default display instead. 578 * 579 * @return The desired minimum height for the wallpaper. This value should 580 * be honored by applications that set the wallpaper but it is not 581 * mandatory. 582 */ 583 public int getDesiredMinimumHeight() { 584 try { 585 return sGlobals.mService.getHeightHint(); 586 } catch (RemoteException e) { 587 // Shouldn't happen! 588 return 0; 589 } 590 } 591 592 /** 593 * For use only by the current home application, to specify the size of 594 * wallpaper it would like to use. This allows such applications to have 595 * a virtual wallpaper that is larger than the physical screen, matching 596 * the size of their workspace. 597 * @param minimumWidth Desired minimum width 598 * @param minimumHeight Desired minimum height 599 */ 600 public void suggestDesiredDimensions(int minimumWidth, int minimumHeight) { 601 try { 602 sGlobals.mService.setDimensionHints(minimumWidth, minimumHeight); 603 } catch (RemoteException e) { 604 // Ignore 605 } 606 } 607 608 /** 609 * Set the position of the current wallpaper within any larger space, when 610 * that wallpaper is visible behind the given window. The X and Y offsets 611 * are floating point numbers ranging from 0 to 1, representing where the 612 * wallpaper should be positioned within the screen space. These only 613 * make sense when the wallpaper is larger than the screen. 614 * 615 * @param windowToken The window who these offsets should be associated 616 * with, as returned by {@link android.view.View#getWindowToken() 617 * View.getWindowToken()}. 618 * @param xOffset The offset along the X dimension, from 0 to 1. 619 * @param yOffset The offset along the Y dimension, from 0 to 1. 620 */ 621 public void setWallpaperOffsets(IBinder windowToken, float xOffset, float yOffset) { 622 try { 623 //Log.v(TAG, "Sending new wallpaper offsets from app..."); 624 ViewRootImpl.getWindowSession(mContext.getMainLooper()).setWallpaperPosition( 625 windowToken, xOffset, yOffset, mWallpaperXStep, mWallpaperYStep); 626 //Log.v(TAG, "...app returning after sending offsets!"); 627 } catch (RemoteException e) { 628 // Ignore. 629 } 630 } 631 632 /** 633 * For applications that use multiple virtual screens showing a wallpaper, 634 * specify the step size between virtual screens. For example, if the 635 * launcher has 3 virtual screens, it would specify an xStep of 0.5, 636 * since the X offset for those screens are 0.0, 0.5 and 1.0 637 * @param xStep The X offset delta from one screen to the next one 638 * @param yStep The Y offset delta from one screen to the next one 639 */ 640 public void setWallpaperOffsetSteps(float xStep, float yStep) { 641 mWallpaperXStep = xStep; 642 mWallpaperYStep = yStep; 643 } 644 645 /** 646 * Send an arbitrary command to the current active wallpaper. 647 * 648 * @param windowToken The window who these offsets should be associated 649 * with, as returned by {@link android.view.View#getWindowToken() 650 * View.getWindowToken()}. 651 * @param action Name of the command to perform. This must be a scoped 652 * name to avoid collisions, such as "com.mycompany.wallpaper.DOIT". 653 * @param x Arbitrary integer argument based on command. 654 * @param y Arbitrary integer argument based on command. 655 * @param z Arbitrary integer argument based on command. 656 * @param extras Optional additional information for the command, or null. 657 */ 658 public void sendWallpaperCommand(IBinder windowToken, String action, 659 int x, int y, int z, Bundle extras) { 660 try { 661 //Log.v(TAG, "Sending new wallpaper offsets from app..."); 662 ViewRootImpl.getWindowSession(mContext.getMainLooper()).sendWallpaperCommand( 663 windowToken, action, x, y, z, extras, false); 664 //Log.v(TAG, "...app returning after sending offsets!"); 665 } catch (RemoteException e) { 666 // Ignore. 667 } 668 } 669 670 /** 671 * Clear the offsets previously associated with this window through 672 * {@link #setWallpaperOffsets(IBinder, float, float)}. This reverts 673 * the window to its default state, where it does not cause the wallpaper 674 * to scroll from whatever its last offsets were. 675 * 676 * @param windowToken The window who these offsets should be associated 677 * with, as returned by {@link android.view.View#getWindowToken() 678 * View.getWindowToken()}. 679 */ 680 public void clearWallpaperOffsets(IBinder windowToken) { 681 try { 682 ViewRootImpl.getWindowSession(mContext.getMainLooper()).setWallpaperPosition( 683 windowToken, -1, -1, -1, -1); 684 } catch (RemoteException e) { 685 // Ignore. 686 } 687 } 688 689 /** 690 * Remove any currently set wallpaper, reverting to the system's default 691 * wallpaper. On success, the intent {@link Intent#ACTION_WALLPAPER_CHANGED} 692 * is broadcast. 693 * 694 * @throws IOException If an error occurs reverting to the default 695 * wallpaper. 696 */ 697 public void clear() throws IOException { 698 setResource(com.android.internal.R.drawable.default_wallpaper); 699 } 700 701 static Bitmap generateBitmap(Bitmap bm, int width, int height) { 702 if (bm == null) { 703 return null; 704 } 705 706 bm.setDensity(DisplayMetrics.DENSITY_DEVICE); 707 708 if (width <= 0 || height <= 0 709 || (bm.getWidth() == width && bm.getHeight() == height)) { 710 return bm; 711 } 712 713 // This is the final bitmap we want to return. 714 try { 715 Bitmap newbm = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); 716 newbm.setDensity(DisplayMetrics.DENSITY_DEVICE); 717 718 Canvas c = new Canvas(newbm); 719 Rect targetRect = new Rect(); 720 targetRect.right = bm.getWidth(); 721 targetRect.bottom = bm.getHeight(); 722 723 int deltaw = width - targetRect.right; 724 int deltah = height - targetRect.bottom; 725 726 if (deltaw > 0 || deltah > 0) { 727 // We need to scale up so it covers the entire area. 728 float scale; 729 if (deltaw > deltah) { 730 scale = width / (float)targetRect.right; 731 } else { 732 scale = height / (float)targetRect.bottom; 733 } 734 targetRect.right = (int)(targetRect.right*scale); 735 targetRect.bottom = (int)(targetRect.bottom*scale); 736 deltaw = width - targetRect.right; 737 deltah = height - targetRect.bottom; 738 } 739 740 targetRect.offset(deltaw/2, deltah/2); 741 742 Paint paint = new Paint(); 743 paint.setFilterBitmap(true); 744 paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC)); 745 c.drawBitmap(bm, null, targetRect, paint); 746 747 bm.recycle(); 748 c.setBitmap(null); 749 return newbm; 750 } catch (OutOfMemoryError e) { 751 Log.w(TAG, "Can't generate default bitmap", e); 752 return bm; 753 } 754 } 755 } 756