WallpaperService.java revision a4a58efe8203d63a9a6bf78b0fa9f2992b25871b
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 17package android.service.wallpaper; 18 19import android.content.res.TypedArray; 20import android.graphics.Canvas; 21import android.view.WindowInsets; 22 23import com.android.internal.R; 24import com.android.internal.os.HandlerCaller; 25import com.android.internal.util.ScreenShapeHelper; 26import com.android.internal.view.BaseIWindow; 27import com.android.internal.view.BaseSurfaceHolder; 28 29import android.annotation.SdkConstant; 30import android.annotation.SdkConstant.SdkConstantType; 31import android.app.Service; 32import android.app.WallpaperManager; 33import android.content.Context; 34import android.content.Intent; 35import android.content.res.Configuration; 36import android.graphics.PixelFormat; 37import android.graphics.Rect; 38import android.hardware.display.DisplayManager; 39import android.hardware.display.DisplayManager.DisplayListener; 40import android.os.Bundle; 41import android.os.IBinder; 42import android.os.Looper; 43import android.os.Message; 44import android.os.RemoteException; 45import android.util.Log; 46import android.view.Display; 47import android.view.Gravity; 48import android.view.IWindowSession; 49import android.view.InputChannel; 50import android.view.InputDevice; 51import android.view.InputEvent; 52import android.view.InputEventReceiver; 53import android.view.MotionEvent; 54import android.view.SurfaceHolder; 55import android.view.View; 56import android.view.ViewGroup; 57import android.view.WindowManager; 58import android.view.WindowManagerGlobal; 59 60import java.io.FileDescriptor; 61import java.io.PrintWriter; 62import java.util.ArrayList; 63 64/** 65 * A wallpaper service is responsible for showing a live wallpaper behind 66 * applications that would like to sit on top of it. This service object 67 * itself does very little -- its only purpose is to generate instances of 68 * {@link Engine} as needed. Implementing a wallpaper thus 69 * involves subclassing from this, subclassing an Engine implementation, 70 * and implementing {@link #onCreateEngine()} to return a new instance of 71 * your engine. 72 */ 73public abstract class WallpaperService extends Service { 74 /** 75 * The {@link Intent} that must be declared as handled by the service. 76 * To be supported, the service must also require the 77 * {@link android.Manifest.permission#BIND_WALLPAPER} permission so 78 * that other applications can not abuse it. 79 */ 80 @SdkConstant(SdkConstantType.SERVICE_ACTION) 81 public static final String SERVICE_INTERFACE = 82 "android.service.wallpaper.WallpaperService"; 83 84 /** 85 * Name under which a WallpaperService component publishes information 86 * about itself. This meta-data must reference an XML resource containing 87 * a <code><{@link android.R.styleable#Wallpaper wallpaper}></code> 88 * tag. 89 */ 90 public static final String SERVICE_META_DATA = "android.service.wallpaper"; 91 92 static final String TAG = "WallpaperService"; 93 static final boolean DEBUG = false; 94 95 private static final int DO_ATTACH = 10; 96 private static final int DO_DETACH = 20; 97 private static final int DO_SET_DESIRED_SIZE = 30; 98 private static final int DO_SET_DISPLAY_PADDING = 40; 99 100 private static final int MSG_UPDATE_SURFACE = 10000; 101 private static final int MSG_VISIBILITY_CHANGED = 10010; 102 private static final int MSG_WALLPAPER_OFFSETS = 10020; 103 private static final int MSG_WALLPAPER_COMMAND = 10025; 104 private static final int MSG_WINDOW_RESIZED = 10030; 105 private static final int MSG_WINDOW_MOVED = 10035; 106 private static final int MSG_TOUCH_EVENT = 10040; 107 108 private final ArrayList<Engine> mActiveEngines 109 = new ArrayList<Engine>(); 110 111 static final class WallpaperCommand { 112 String action; 113 int x; 114 int y; 115 int z; 116 Bundle extras; 117 boolean sync; 118 } 119 120 /** 121 * The actual implementation of a wallpaper. A wallpaper service may 122 * have multiple instances running (for example as a real wallpaper 123 * and as a preview), each of which is represented by its own Engine 124 * instance. You must implement {@link WallpaperService#onCreateEngine()} 125 * to return your concrete Engine implementation. 126 */ 127 public class Engine { 128 IWallpaperEngineWrapper mIWallpaperEngine; 129 130 // Copies from mIWallpaperEngine. 131 HandlerCaller mCaller; 132 IWallpaperConnection mConnection; 133 IBinder mWindowToken; 134 135 boolean mInitializing = true; 136 boolean mVisible; 137 boolean mReportedVisible; 138 boolean mDestroyed; 139 140 // Current window state. 141 boolean mCreated; 142 boolean mSurfaceCreated; 143 boolean mIsCreating; 144 boolean mDrawingAllowed; 145 boolean mOffsetsChanged; 146 boolean mFixedSizeAllowed; 147 int mWidth; 148 int mHeight; 149 int mFormat; 150 int mType; 151 int mCurWidth; 152 int mCurHeight; 153 int mWindowFlags = WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE; 154 int mWindowPrivateFlags = 155 WindowManager.LayoutParams.PRIVATE_FLAG_WANTS_OFFSET_NOTIFICATIONS; 156 int mCurWindowFlags = mWindowFlags; 157 int mCurWindowPrivateFlags = mWindowPrivateFlags; 158 final Rect mVisibleInsets = new Rect(); 159 final Rect mWinFrame = new Rect(); 160 final Rect mOverscanInsets = new Rect(); 161 final Rect mContentInsets = new Rect(); 162 final Rect mStableInsets = new Rect(); 163 final Rect mOutsets = new Rect(); 164 final Rect mDispatchedOverscanInsets = new Rect(); 165 final Rect mDispatchedContentInsets = new Rect(); 166 final Rect mDispatchedStableInsets = new Rect(); 167 final Rect mDispatchedOutsets = new Rect(); 168 final Rect mFinalSystemInsets = new Rect(); 169 final Rect mFinalStableInsets = new Rect(); 170 final Rect mBackdropFrame = new Rect(); 171 final Configuration mConfiguration = new Configuration(); 172 173 final WindowManager.LayoutParams mLayout 174 = new WindowManager.LayoutParams(); 175 IWindowSession mSession; 176 InputChannel mInputChannel; 177 178 final Object mLock = new Object(); 179 boolean mOffsetMessageEnqueued; 180 float mPendingXOffset; 181 float mPendingYOffset; 182 float mPendingXOffsetStep; 183 float mPendingYOffsetStep; 184 boolean mPendingSync; 185 MotionEvent mPendingMove; 186 187 DisplayManager mDisplayManager; 188 Display mDisplay; 189 private int mDisplayState; 190 191 final BaseSurfaceHolder mSurfaceHolder = new BaseSurfaceHolder() { 192 { 193 mRequestedFormat = PixelFormat.RGBX_8888; 194 } 195 196 @Override 197 public boolean onAllowLockCanvas() { 198 return mDrawingAllowed; 199 } 200 201 @Override 202 public void onRelayoutContainer() { 203 Message msg = mCaller.obtainMessage(MSG_UPDATE_SURFACE); 204 mCaller.sendMessage(msg); 205 } 206 207 @Override 208 public void onUpdateSurface() { 209 Message msg = mCaller.obtainMessage(MSG_UPDATE_SURFACE); 210 mCaller.sendMessage(msg); 211 } 212 213 public boolean isCreating() { 214 return mIsCreating; 215 } 216 217 @Override 218 public void setFixedSize(int width, int height) { 219 if (!mFixedSizeAllowed) { 220 // Regular apps can't do this. It can only work for 221 // certain designs of window animations, so you can't 222 // rely on it. 223 throw new UnsupportedOperationException( 224 "Wallpapers currently only support sizing from layout"); 225 } 226 super.setFixedSize(width, height); 227 } 228 229 public void setKeepScreenOn(boolean screenOn) { 230 throw new UnsupportedOperationException( 231 "Wallpapers do not support keep screen on"); 232 } 233 234 @Override 235 public Canvas lockCanvas() { 236 if (mDisplayState == Display.STATE_DOZE 237 || mDisplayState == Display.STATE_DOZE_SUSPEND) { 238 try { 239 mSession.pokeDrawLock(mWindow); 240 } catch (RemoteException e) { 241 // System server died, can be ignored. 242 } 243 } 244 return super.lockCanvas(); 245 } 246 }; 247 248 final class WallpaperInputEventReceiver extends InputEventReceiver { 249 public WallpaperInputEventReceiver(InputChannel inputChannel, Looper looper) { 250 super(inputChannel, looper); 251 } 252 253 @Override 254 public void onInputEvent(InputEvent event) { 255 boolean handled = false; 256 try { 257 if (event instanceof MotionEvent 258 && (event.getSource() & InputDevice.SOURCE_CLASS_POINTER) != 0) { 259 MotionEvent dup = MotionEvent.obtainNoHistory((MotionEvent)event); 260 dispatchPointer(dup); 261 handled = true; 262 } 263 } finally { 264 finishInputEvent(event, handled); 265 } 266 } 267 } 268 WallpaperInputEventReceiver mInputEventReceiver; 269 270 final BaseIWindow mWindow = new BaseIWindow() { 271 @Override 272 public void resized(Rect frame, Rect overscanInsets, Rect contentInsets, 273 Rect visibleInsets, Rect stableInsets, Rect outsets, boolean reportDraw, 274 Configuration newConfig, Rect backDropRect, boolean forceLayout) { 275 Message msg = mCaller.obtainMessageIO(MSG_WINDOW_RESIZED, 276 reportDraw ? 1 : 0, outsets); 277 mCaller.sendMessage(msg); 278 } 279 280 @Override 281 public void moved(int newX, int newY) { 282 Message msg = mCaller.obtainMessageII(MSG_WINDOW_MOVED, newX, newY); 283 mCaller.sendMessage(msg); 284 } 285 286 @Override 287 public void dispatchAppVisibility(boolean visible) { 288 // We don't do this in preview mode; we'll let the preview 289 // activity tell us when to run. 290 if (!mIWallpaperEngine.mIsPreview) { 291 Message msg = mCaller.obtainMessageI(MSG_VISIBILITY_CHANGED, 292 visible ? 1 : 0); 293 mCaller.sendMessage(msg); 294 } 295 } 296 297 @Override 298 public void dispatchWallpaperOffsets(float x, float y, float xStep, float yStep, 299 boolean sync) { 300 synchronized (mLock) { 301 if (DEBUG) Log.v(TAG, "Dispatch wallpaper offsets: " + x + ", " + y); 302 mPendingXOffset = x; 303 mPendingYOffset = y; 304 mPendingXOffsetStep = xStep; 305 mPendingYOffsetStep = yStep; 306 if (sync) { 307 mPendingSync = true; 308 } 309 if (!mOffsetMessageEnqueued) { 310 mOffsetMessageEnqueued = true; 311 Message msg = mCaller.obtainMessage(MSG_WALLPAPER_OFFSETS); 312 mCaller.sendMessage(msg); 313 } 314 } 315 } 316 317 @Override 318 public void dispatchWallpaperCommand(String action, int x, int y, 319 int z, Bundle extras, boolean sync) { 320 synchronized (mLock) { 321 if (DEBUG) Log.v(TAG, "Dispatch wallpaper command: " + x + ", " + y); 322 WallpaperCommand cmd = new WallpaperCommand(); 323 cmd.action = action; 324 cmd.x = x; 325 cmd.y = y; 326 cmd.z = z; 327 cmd.extras = extras; 328 cmd.sync = sync; 329 Message msg = mCaller.obtainMessage(MSG_WALLPAPER_COMMAND); 330 msg.obj = cmd; 331 mCaller.sendMessage(msg); 332 } 333 } 334 }; 335 336 /** 337 * Provides access to the surface in which this wallpaper is drawn. 338 */ 339 public SurfaceHolder getSurfaceHolder() { 340 return mSurfaceHolder; 341 } 342 343 /** 344 * Convenience for {@link WallpaperManager#getDesiredMinimumWidth() 345 * WallpaperManager.getDesiredMinimumWidth()}, returning the width 346 * that the system would like this wallpaper to run in. 347 */ 348 public int getDesiredMinimumWidth() { 349 return mIWallpaperEngine.mReqWidth; 350 } 351 352 /** 353 * Convenience for {@link WallpaperManager#getDesiredMinimumHeight() 354 * WallpaperManager.getDesiredMinimumHeight()}, returning the height 355 * that the system would like this wallpaper to run in. 356 */ 357 public int getDesiredMinimumHeight() { 358 return mIWallpaperEngine.mReqHeight; 359 } 360 361 /** 362 * Return whether the wallpaper is currently visible to the user, 363 * this is the last value supplied to 364 * {@link #onVisibilityChanged(boolean)}. 365 */ 366 public boolean isVisible() { 367 return mReportedVisible; 368 } 369 370 /** 371 * Returns true if this engine is running in preview mode -- that is, 372 * it is being shown to the user before they select it as the actual 373 * wallpaper. 374 */ 375 public boolean isPreview() { 376 return mIWallpaperEngine.mIsPreview; 377 } 378 379 /** 380 * Control whether this wallpaper will receive raw touch events 381 * from the window manager as the user interacts with the window 382 * that is currently displaying the wallpaper. By default they 383 * are turned off. If enabled, the events will be received in 384 * {@link #onTouchEvent(MotionEvent)}. 385 */ 386 public void setTouchEventsEnabled(boolean enabled) { 387 mWindowFlags = enabled 388 ? (mWindowFlags&~WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE) 389 : (mWindowFlags|WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE); 390 if (mCreated) { 391 updateSurface(false, false, false); 392 } 393 } 394 395 /** 396 * Control whether this wallpaper will receive notifications when the wallpaper 397 * has been scrolled. By default, wallpapers will receive notifications, although 398 * the default static image wallpapers do not. It is a performance optimization to 399 * set this to false. 400 * 401 * @param enabled whether the wallpaper wants to receive offset notifications 402 */ 403 public void setOffsetNotificationsEnabled(boolean enabled) { 404 mWindowPrivateFlags = enabled 405 ? (mWindowPrivateFlags | 406 WindowManager.LayoutParams.PRIVATE_FLAG_WANTS_OFFSET_NOTIFICATIONS) 407 : (mWindowPrivateFlags & 408 ~WindowManager.LayoutParams.PRIVATE_FLAG_WANTS_OFFSET_NOTIFICATIONS); 409 if (mCreated) { 410 updateSurface(false, false, false); 411 } 412 } 413 414 /** {@hide} */ 415 public void setFixedSizeAllowed(boolean allowed) { 416 mFixedSizeAllowed = allowed; 417 } 418 419 /** 420 * Called once to initialize the engine. After returning, the 421 * engine's surface will be created by the framework. 422 */ 423 public void onCreate(SurfaceHolder surfaceHolder) { 424 } 425 426 /** 427 * Called right before the engine is going away. After this the 428 * surface will be destroyed and this Engine object is no longer 429 * valid. 430 */ 431 public void onDestroy() { 432 } 433 434 /** 435 * Called to inform you of the wallpaper becoming visible or 436 * hidden. <em>It is very important that a wallpaper only use 437 * CPU while it is visible.</em>. 438 */ 439 public void onVisibilityChanged(boolean visible) { 440 } 441 442 /** 443 * Called with the current insets that are in effect for the wallpaper. 444 * This gives you the part of the overall wallpaper surface that will 445 * generally be visible to the user (ignoring position offsets applied to it). 446 * 447 * @param insets Insets to apply. 448 */ 449 public void onApplyWindowInsets(WindowInsets insets) { 450 } 451 452 /** 453 * Called as the user performs touch-screen interaction with the 454 * window that is currently showing this wallpaper. Note that the 455 * events you receive here are driven by the actual application the 456 * user is interacting with, so if it is slow you will get fewer 457 * move events. 458 */ 459 public void onTouchEvent(MotionEvent event) { 460 } 461 462 /** 463 * Called to inform you of the wallpaper's offsets changing 464 * within its contain, corresponding to the container's 465 * call to {@link WallpaperManager#setWallpaperOffsets(IBinder, float, float) 466 * WallpaperManager.setWallpaperOffsets()}. 467 */ 468 public void onOffsetsChanged(float xOffset, float yOffset, 469 float xOffsetStep, float yOffsetStep, 470 int xPixelOffset, int yPixelOffset) { 471 } 472 473 /** 474 * Process a command that was sent to the wallpaper with 475 * {@link WallpaperManager#sendWallpaperCommand}. 476 * The default implementation does nothing, and always returns null 477 * as the result. 478 * 479 * @param action The name of the command to perform. This tells you 480 * what to do and how to interpret the rest of the arguments. 481 * @param x Generic integer parameter. 482 * @param y Generic integer parameter. 483 * @param z Generic integer parameter. 484 * @param extras Any additional parameters. 485 * @param resultRequested If true, the caller is requesting that 486 * a result, appropriate for the command, be returned back. 487 * @return If returning a result, create a Bundle and place the 488 * result data in to it. Otherwise return null. 489 */ 490 public Bundle onCommand(String action, int x, int y, int z, 491 Bundle extras, boolean resultRequested) { 492 return null; 493 } 494 495 /** 496 * Called when an application has changed the desired virtual size of 497 * the wallpaper. 498 */ 499 public void onDesiredSizeChanged(int desiredWidth, int desiredHeight) { 500 } 501 502 /** 503 * Convenience for {@link SurfaceHolder.Callback#surfaceChanged 504 * SurfaceHolder.Callback.surfaceChanged()}. 505 */ 506 public void onSurfaceChanged(SurfaceHolder holder, int format, int width, int height) { 507 } 508 509 /** 510 * Convenience for {@link SurfaceHolder.Callback2#surfaceRedrawNeeded 511 * SurfaceHolder.Callback.surfaceRedrawNeeded()}. 512 */ 513 public void onSurfaceRedrawNeeded(SurfaceHolder holder) { 514 } 515 516 /** 517 * Convenience for {@link SurfaceHolder.Callback#surfaceCreated 518 * SurfaceHolder.Callback.surfaceCreated()}. 519 */ 520 public void onSurfaceCreated(SurfaceHolder holder) { 521 } 522 523 /** 524 * Convenience for {@link SurfaceHolder.Callback#surfaceDestroyed 525 * SurfaceHolder.Callback.surfaceDestroyed()}. 526 */ 527 public void onSurfaceDestroyed(SurfaceHolder holder) { 528 } 529 530 protected void dump(String prefix, FileDescriptor fd, PrintWriter out, String[] args) { 531 out.print(prefix); out.print("mInitializing="); out.print(mInitializing); 532 out.print(" mDestroyed="); out.println(mDestroyed); 533 out.print(prefix); out.print("mVisible="); out.print(mVisible); 534 out.print(" mReportedVisible="); out.println(mReportedVisible); 535 out.print(prefix); out.print("mDisplay="); out.println(mDisplay); 536 out.print(prefix); out.print("mCreated="); out.print(mCreated); 537 out.print(" mSurfaceCreated="); out.print(mSurfaceCreated); 538 out.print(" mIsCreating="); out.print(mIsCreating); 539 out.print(" mDrawingAllowed="); out.println(mDrawingAllowed); 540 out.print(prefix); out.print("mWidth="); out.print(mWidth); 541 out.print(" mCurWidth="); out.print(mCurWidth); 542 out.print(" mHeight="); out.print(mHeight); 543 out.print(" mCurHeight="); out.println(mCurHeight); 544 out.print(prefix); out.print("mType="); out.print(mType); 545 out.print(" mWindowFlags="); out.print(mWindowFlags); 546 out.print(" mCurWindowFlags="); out.println(mCurWindowFlags); 547 out.print(prefix); out.print("mWindowPrivateFlags="); out.print(mWindowPrivateFlags); 548 out.print(" mCurWindowPrivateFlags="); out.println(mCurWindowPrivateFlags); 549 out.print(prefix); out.print("mVisibleInsets="); 550 out.print(mVisibleInsets.toShortString()); 551 out.print(" mWinFrame="); out.print(mWinFrame.toShortString()); 552 out.print(" mContentInsets="); out.println(mContentInsets.toShortString()); 553 out.print(prefix); out.print("mConfiguration="); out.println(mConfiguration); 554 out.print(prefix); out.print("mLayout="); out.println(mLayout); 555 synchronized (mLock) { 556 out.print(prefix); out.print("mPendingXOffset="); out.print(mPendingXOffset); 557 out.print(" mPendingXOffset="); out.println(mPendingXOffset); 558 out.print(prefix); out.print("mPendingXOffsetStep="); 559 out.print(mPendingXOffsetStep); 560 out.print(" mPendingXOffsetStep="); out.println(mPendingXOffsetStep); 561 out.print(prefix); out.print("mOffsetMessageEnqueued="); 562 out.print(mOffsetMessageEnqueued); 563 out.print(" mPendingSync="); out.println(mPendingSync); 564 if (mPendingMove != null) { 565 out.print(prefix); out.print("mPendingMove="); out.println(mPendingMove); 566 } 567 } 568 } 569 570 private void dispatchPointer(MotionEvent event) { 571 if (event.isTouchEvent()) { 572 synchronized (mLock) { 573 if (event.getAction() == MotionEvent.ACTION_MOVE) { 574 mPendingMove = event; 575 } else { 576 mPendingMove = null; 577 } 578 } 579 Message msg = mCaller.obtainMessageO(MSG_TOUCH_EVENT, event); 580 mCaller.sendMessage(msg); 581 } else { 582 event.recycle(); 583 } 584 } 585 586 void updateSurface(boolean forceRelayout, boolean forceReport, boolean redrawNeeded) { 587 if (mDestroyed) { 588 Log.w(TAG, "Ignoring updateSurface: destroyed"); 589 } 590 591 boolean fixedSize = false; 592 int myWidth = mSurfaceHolder.getRequestedWidth(); 593 if (myWidth <= 0) myWidth = ViewGroup.LayoutParams.MATCH_PARENT; 594 else fixedSize = true; 595 int myHeight = mSurfaceHolder.getRequestedHeight(); 596 if (myHeight <= 0) myHeight = ViewGroup.LayoutParams.MATCH_PARENT; 597 else fixedSize = true; 598 599 final boolean creating = !mCreated; 600 final boolean surfaceCreating = !mSurfaceCreated; 601 final boolean formatChanged = mFormat != mSurfaceHolder.getRequestedFormat(); 602 boolean sizeChanged = mWidth != myWidth || mHeight != myHeight; 603 boolean insetsChanged = !mCreated; 604 final boolean typeChanged = mType != mSurfaceHolder.getRequestedType(); 605 final boolean flagsChanged = mCurWindowFlags != mWindowFlags || 606 mCurWindowPrivateFlags != mWindowPrivateFlags; 607 if (forceRelayout || creating || surfaceCreating || formatChanged || sizeChanged 608 || typeChanged || flagsChanged || redrawNeeded 609 || !mIWallpaperEngine.mShownReported) { 610 611 if (DEBUG) Log.v(TAG, "Changes: creating=" + creating 612 + " format=" + formatChanged + " size=" + sizeChanged); 613 614 try { 615 mWidth = myWidth; 616 mHeight = myHeight; 617 mFormat = mSurfaceHolder.getRequestedFormat(); 618 mType = mSurfaceHolder.getRequestedType(); 619 620 mLayout.x = 0; 621 mLayout.y = 0; 622 mLayout.width = myWidth; 623 mLayout.height = myHeight; 624 625 mLayout.format = mFormat; 626 627 mCurWindowFlags = mWindowFlags; 628 mLayout.flags = mWindowFlags 629 | WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS 630 | WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN 631 | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE 632 ; 633 mCurWindowPrivateFlags = mWindowPrivateFlags; 634 mLayout.privateFlags = mWindowPrivateFlags; 635 636 mLayout.memoryType = mType; 637 mLayout.token = mWindowToken; 638 639 if (!mCreated) { 640 // Retrieve watch round info 641 TypedArray windowStyle = obtainStyledAttributes( 642 com.android.internal.R.styleable.Window); 643 windowStyle.recycle(); 644 645 // Add window 646 mLayout.type = mIWallpaperEngine.mWindowType; 647 mLayout.gravity = Gravity.START|Gravity.TOP; 648 mLayout.setTitle(WallpaperService.this.getClass().getName()); 649 mLayout.windowAnimations = 650 com.android.internal.R.style.Animation_Wallpaper; 651 mInputChannel = new InputChannel(); 652 if (mSession.addToDisplay(mWindow, mWindow.mSeq, mLayout, View.VISIBLE, 653 Display.DEFAULT_DISPLAY, mContentInsets, mStableInsets, mOutsets, 654 mInputChannel) < 0) { 655 Log.w(TAG, "Failed to add window while updating wallpaper surface."); 656 return; 657 } 658 mCreated = true; 659 660 mInputEventReceiver = new WallpaperInputEventReceiver( 661 mInputChannel, Looper.myLooper()); 662 } 663 664 mSurfaceHolder.mSurfaceLock.lock(); 665 mDrawingAllowed = true; 666 667 if (!fixedSize) { 668 mLayout.surfaceInsets.set(mIWallpaperEngine.mDisplayPadding); 669 mLayout.surfaceInsets.left += mOutsets.left; 670 mLayout.surfaceInsets.top += mOutsets.top; 671 mLayout.surfaceInsets.right += mOutsets.right; 672 mLayout.surfaceInsets.bottom += mOutsets.bottom; 673 } else { 674 mLayout.surfaceInsets.set(0, 0, 0, 0); 675 } 676 final int relayoutResult = mSession.relayout( 677 mWindow, mWindow.mSeq, mLayout, mWidth, mHeight, 678 View.VISIBLE, 0, mWinFrame, mOverscanInsets, mContentInsets, 679 mVisibleInsets, mStableInsets, mOutsets, mBackdropFrame, 680 mConfiguration, mSurfaceHolder.mSurface); 681 682 if (DEBUG) Log.v(TAG, "New surface: " + mSurfaceHolder.mSurface 683 + ", frame=" + mWinFrame); 684 685 int w = mWinFrame.width(); 686 int h = mWinFrame.height(); 687 688 if (!fixedSize) { 689 final Rect padding = mIWallpaperEngine.mDisplayPadding; 690 w += padding.left + padding.right + mOutsets.left + mOutsets.right; 691 h += padding.top + padding.bottom + mOutsets.top + mOutsets.bottom; 692 mOverscanInsets.left += padding.left; 693 mOverscanInsets.top += padding.top; 694 mOverscanInsets.right += padding.right; 695 mOverscanInsets.bottom += padding.bottom; 696 mContentInsets.left += padding.left; 697 mContentInsets.top += padding.top; 698 mContentInsets.right += padding.right; 699 mContentInsets.bottom += padding.bottom; 700 mStableInsets.left += padding.left; 701 mStableInsets.top += padding.top; 702 mStableInsets.right += padding.right; 703 mStableInsets.bottom += padding.bottom; 704 } 705 706 if (mCurWidth != w) { 707 sizeChanged = true; 708 mCurWidth = w; 709 } 710 if (mCurHeight != h) { 711 sizeChanged = true; 712 mCurHeight = h; 713 } 714 715 if (DEBUG) { 716 Log.v(TAG, "Wallpaper size has changed: (" + mCurWidth + ", " + mCurHeight); 717 } 718 719 insetsChanged |= !mDispatchedOverscanInsets.equals(mOverscanInsets); 720 insetsChanged |= !mDispatchedContentInsets.equals(mContentInsets); 721 insetsChanged |= !mDispatchedStableInsets.equals(mStableInsets); 722 insetsChanged |= !mDispatchedOutsets.equals(mOutsets); 723 724 mSurfaceHolder.setSurfaceFrameSize(w, h); 725 mSurfaceHolder.mSurfaceLock.unlock(); 726 727 if (!mSurfaceHolder.mSurface.isValid()) { 728 reportSurfaceDestroyed(); 729 if (DEBUG) Log.v(TAG, "Layout: Surface destroyed"); 730 return; 731 } 732 733 boolean didSurface = false; 734 735 try { 736 mSurfaceHolder.ungetCallbacks(); 737 738 if (surfaceCreating) { 739 mIsCreating = true; 740 didSurface = true; 741 if (DEBUG) Log.v(TAG, "onSurfaceCreated(" 742 + mSurfaceHolder + "): " + this); 743 onSurfaceCreated(mSurfaceHolder); 744 SurfaceHolder.Callback callbacks[] = mSurfaceHolder.getCallbacks(); 745 if (callbacks != null) { 746 for (SurfaceHolder.Callback c : callbacks) { 747 c.surfaceCreated(mSurfaceHolder); 748 } 749 } 750 } 751 752 redrawNeeded |= creating || (relayoutResult 753 & WindowManagerGlobal.RELAYOUT_RES_FIRST_TIME) != 0; 754 755 if (forceReport || creating || surfaceCreating 756 || formatChanged || sizeChanged) { 757 if (DEBUG) { 758 RuntimeException e = new RuntimeException(); 759 e.fillInStackTrace(); 760 Log.w(TAG, "forceReport=" + forceReport + " creating=" + creating 761 + " formatChanged=" + formatChanged 762 + " sizeChanged=" + sizeChanged, e); 763 } 764 if (DEBUG) Log.v(TAG, "onSurfaceChanged(" 765 + mSurfaceHolder + ", " + mFormat 766 + ", " + mCurWidth + ", " + mCurHeight 767 + "): " + this); 768 didSurface = true; 769 onSurfaceChanged(mSurfaceHolder, mFormat, 770 mCurWidth, mCurHeight); 771 SurfaceHolder.Callback callbacks[] = mSurfaceHolder.getCallbacks(); 772 if (callbacks != null) { 773 for (SurfaceHolder.Callback c : callbacks) { 774 c.surfaceChanged(mSurfaceHolder, mFormat, 775 mCurWidth, mCurHeight); 776 } 777 } 778 } 779 780 if (insetsChanged) { 781 mDispatchedOverscanInsets.set(mOverscanInsets); 782 mDispatchedOverscanInsets.left += mOutsets.left; 783 mDispatchedOverscanInsets.top += mOutsets.top; 784 mDispatchedOverscanInsets.right += mOutsets.right; 785 mDispatchedOverscanInsets.bottom += mOutsets.bottom; 786 mDispatchedContentInsets.set(mContentInsets); 787 mDispatchedStableInsets.set(mStableInsets); 788 mDispatchedOutsets.set(mOutsets); 789 mFinalSystemInsets.set(mDispatchedOverscanInsets); 790 mFinalStableInsets.set(mDispatchedStableInsets); 791 WindowInsets insets = new WindowInsets(mFinalSystemInsets, 792 null, mFinalStableInsets, 793 getResources().getConfiguration().isScreenRound()); 794 if (DEBUG) { 795 Log.v(TAG, "dispatching insets=" + insets); 796 } 797 onApplyWindowInsets(insets); 798 } 799 800 if (redrawNeeded) { 801 onSurfaceRedrawNeeded(mSurfaceHolder); 802 SurfaceHolder.Callback callbacks[] = mSurfaceHolder.getCallbacks(); 803 if (callbacks != null) { 804 for (SurfaceHolder.Callback c : callbacks) { 805 if (c instanceof SurfaceHolder.Callback2) { 806 ((SurfaceHolder.Callback2)c).surfaceRedrawNeeded( 807 mSurfaceHolder); 808 } 809 } 810 } 811 } 812 813 if (didSurface && !mReportedVisible) { 814 // This wallpaper is currently invisible, but its 815 // surface has changed. At this point let's tell it 816 // again that it is invisible in case the report about 817 // the surface caused it to start running. We really 818 // don't want wallpapers running when not visible. 819 if (mIsCreating) { 820 // Some wallpapers will ignore this call if they 821 // had previously been told they were invisble, 822 // so if we are creating a new surface then toggle 823 // the state to get them to notice. 824 if (DEBUG) Log.v(TAG, "onVisibilityChanged(true) at surface: " 825 + this); 826 onVisibilityChanged(true); 827 } 828 if (DEBUG) Log.v(TAG, "onVisibilityChanged(false) at surface: " 829 + this); 830 onVisibilityChanged(false); 831 } 832 833 } finally { 834 mIsCreating = false; 835 mSurfaceCreated = true; 836 if (redrawNeeded) { 837 mSession.finishDrawing(mWindow); 838 } 839 mIWallpaperEngine.reportShown(); 840 } 841 } catch (RemoteException ex) { 842 } 843 if (DEBUG) Log.v( 844 TAG, "Layout: x=" + mLayout.x + " y=" + mLayout.y + 845 " w=" + mLayout.width + " h=" + mLayout.height); 846 } 847 } 848 849 void attach(IWallpaperEngineWrapper wrapper) { 850 if (DEBUG) Log.v(TAG, "attach: " + this + " wrapper=" + wrapper); 851 if (mDestroyed) { 852 return; 853 } 854 855 mIWallpaperEngine = wrapper; 856 mCaller = wrapper.mCaller; 857 mConnection = wrapper.mConnection; 858 mWindowToken = wrapper.mWindowToken; 859 mSurfaceHolder.setSizeFromLayout(); 860 mInitializing = true; 861 mSession = WindowManagerGlobal.getWindowSession(); 862 863 mWindow.setSession(mSession); 864 865 mLayout.packageName = getPackageName(); 866 867 mDisplayManager = (DisplayManager)getSystemService(Context.DISPLAY_SERVICE); 868 mDisplayManager.registerDisplayListener(mDisplayListener, mCaller.getHandler()); 869 mDisplay = mDisplayManager.getDisplay(Display.DEFAULT_DISPLAY); 870 mDisplayState = mDisplay.getState(); 871 872 if (DEBUG) Log.v(TAG, "onCreate(): " + this); 873 onCreate(mSurfaceHolder); 874 875 mInitializing = false; 876 mReportedVisible = false; 877 updateSurface(false, false, false); 878 } 879 880 void doDesiredSizeChanged(int desiredWidth, int desiredHeight) { 881 if (!mDestroyed) { 882 if (DEBUG) Log.v(TAG, "onDesiredSizeChanged(" 883 + desiredWidth + "," + desiredHeight + "): " + this); 884 mIWallpaperEngine.mReqWidth = desiredWidth; 885 mIWallpaperEngine.mReqHeight = desiredHeight; 886 onDesiredSizeChanged(desiredWidth, desiredHeight); 887 doOffsetsChanged(true); 888 } 889 } 890 891 void doDisplayPaddingChanged(Rect padding) { 892 if (!mDestroyed) { 893 if (DEBUG) Log.v(TAG, "onDisplayPaddingChanged(" + padding + "): " + this); 894 if (!mIWallpaperEngine.mDisplayPadding.equals(padding)) { 895 mIWallpaperEngine.mDisplayPadding.set(padding); 896 updateSurface(true, false, false); 897 } 898 } 899 } 900 901 void doVisibilityChanged(boolean visible) { 902 if (!mDestroyed) { 903 mVisible = visible; 904 reportVisibility(); 905 } 906 } 907 908 void reportVisibility() { 909 if (!mDestroyed) { 910 mDisplayState = mDisplay == null ? Display.STATE_UNKNOWN : mDisplay.getState(); 911 boolean visible = mVisible && mDisplayState != Display.STATE_OFF; 912 if (mReportedVisible != visible) { 913 mReportedVisible = visible; 914 if (DEBUG) Log.v(TAG, "onVisibilityChanged(" + visible 915 + "): " + this); 916 if (visible) { 917 // If becoming visible, in preview mode the surface 918 // may have been destroyed so now we need to make 919 // sure it is re-created. 920 doOffsetsChanged(false); 921 updateSurface(false, false, false); 922 } 923 onVisibilityChanged(visible); 924 } 925 } 926 } 927 928 void doOffsetsChanged(boolean always) { 929 if (mDestroyed) { 930 return; 931 } 932 933 if (!always && !mOffsetsChanged) { 934 return; 935 } 936 937 float xOffset; 938 float yOffset; 939 float xOffsetStep; 940 float yOffsetStep; 941 boolean sync; 942 synchronized (mLock) { 943 xOffset = mPendingXOffset; 944 yOffset = mPendingYOffset; 945 xOffsetStep = mPendingXOffsetStep; 946 yOffsetStep = mPendingYOffsetStep; 947 sync = mPendingSync; 948 mPendingSync = false; 949 mOffsetMessageEnqueued = false; 950 } 951 952 if (mSurfaceCreated) { 953 if (mReportedVisible) { 954 if (DEBUG) Log.v(TAG, "Offsets change in " + this 955 + ": " + xOffset + "," + yOffset); 956 final int availw = mIWallpaperEngine.mReqWidth-mCurWidth; 957 final int xPixels = availw > 0 ? -(int)(availw*xOffset+.5f) : 0; 958 final int availh = mIWallpaperEngine.mReqHeight-mCurHeight; 959 final int yPixels = availh > 0 ? -(int)(availh*yOffset+.5f) : 0; 960 onOffsetsChanged(xOffset, yOffset, xOffsetStep, yOffsetStep, xPixels, yPixels); 961 } else { 962 mOffsetsChanged = true; 963 } 964 } 965 966 if (sync) { 967 try { 968 if (DEBUG) Log.v(TAG, "Reporting offsets change complete"); 969 mSession.wallpaperOffsetsComplete(mWindow.asBinder()); 970 } catch (RemoteException e) { 971 } 972 } 973 } 974 975 void doCommand(WallpaperCommand cmd) { 976 Bundle result; 977 if (!mDestroyed) { 978 result = onCommand(cmd.action, cmd.x, cmd.y, cmd.z, 979 cmd.extras, cmd.sync); 980 } else { 981 result = null; 982 } 983 if (cmd.sync) { 984 try { 985 if (DEBUG) Log.v(TAG, "Reporting command complete"); 986 mSession.wallpaperCommandComplete(mWindow.asBinder(), result); 987 } catch (RemoteException e) { 988 } 989 } 990 } 991 992 void reportSurfaceDestroyed() { 993 if (mSurfaceCreated) { 994 mSurfaceCreated = false; 995 mSurfaceHolder.ungetCallbacks(); 996 SurfaceHolder.Callback callbacks[] = mSurfaceHolder.getCallbacks(); 997 if (callbacks != null) { 998 for (SurfaceHolder.Callback c : callbacks) { 999 c.surfaceDestroyed(mSurfaceHolder); 1000 } 1001 } 1002 if (DEBUG) Log.v(TAG, "onSurfaceDestroyed(" 1003 + mSurfaceHolder + "): " + this); 1004 onSurfaceDestroyed(mSurfaceHolder); 1005 } 1006 } 1007 1008 void detach() { 1009 if (mDestroyed) { 1010 return; 1011 } 1012 1013 mDestroyed = true; 1014 1015 if (mDisplayManager != null) { 1016 mDisplayManager.unregisterDisplayListener(mDisplayListener); 1017 } 1018 1019 if (mVisible) { 1020 mVisible = false; 1021 if (DEBUG) Log.v(TAG, "onVisibilityChanged(false): " + this); 1022 onVisibilityChanged(false); 1023 } 1024 1025 reportSurfaceDestroyed(); 1026 1027 if (DEBUG) Log.v(TAG, "onDestroy(): " + this); 1028 onDestroy(); 1029 1030 if (mCreated) { 1031 try { 1032 if (DEBUG) Log.v(TAG, "Removing window and destroying surface " 1033 + mSurfaceHolder.getSurface() + " of: " + this); 1034 1035 if (mInputEventReceiver != null) { 1036 mInputEventReceiver.dispose(); 1037 mInputEventReceiver = null; 1038 } 1039 1040 mSession.remove(mWindow); 1041 } catch (RemoteException e) { 1042 } 1043 mSurfaceHolder.mSurface.release(); 1044 mCreated = false; 1045 1046 // Dispose the input channel after removing the window so the Window Manager 1047 // doesn't interpret the input channel being closed as an abnormal termination. 1048 if (mInputChannel != null) { 1049 mInputChannel.dispose(); 1050 mInputChannel = null; 1051 } 1052 } 1053 } 1054 1055 private final DisplayListener mDisplayListener = new DisplayListener() { 1056 @Override 1057 public void onDisplayChanged(int displayId) { 1058 if (mDisplay.getDisplayId() == displayId) { 1059 reportVisibility(); 1060 } 1061 } 1062 1063 @Override 1064 public void onDisplayRemoved(int displayId) { 1065 } 1066 1067 @Override 1068 public void onDisplayAdded(int displayId) { 1069 } 1070 }; 1071 } 1072 1073 class IWallpaperEngineWrapper extends IWallpaperEngine.Stub 1074 implements HandlerCaller.Callback { 1075 private final HandlerCaller mCaller; 1076 1077 final IWallpaperConnection mConnection; 1078 final IBinder mWindowToken; 1079 final int mWindowType; 1080 final boolean mIsPreview; 1081 boolean mShownReported; 1082 int mReqWidth; 1083 int mReqHeight; 1084 final Rect mDisplayPadding = new Rect(); 1085 1086 Engine mEngine; 1087 1088 IWallpaperEngineWrapper(WallpaperService context, 1089 IWallpaperConnection conn, IBinder windowToken, 1090 int windowType, boolean isPreview, int reqWidth, int reqHeight, Rect padding) { 1091 mCaller = new HandlerCaller(context, context.getMainLooper(), this, true); 1092 mConnection = conn; 1093 mWindowToken = windowToken; 1094 mWindowType = windowType; 1095 mIsPreview = isPreview; 1096 mReqWidth = reqWidth; 1097 mReqHeight = reqHeight; 1098 mDisplayPadding.set(padding); 1099 1100 Message msg = mCaller.obtainMessage(DO_ATTACH); 1101 mCaller.sendMessage(msg); 1102 } 1103 1104 public void setDesiredSize(int width, int height) { 1105 Message msg = mCaller.obtainMessageII(DO_SET_DESIRED_SIZE, width, height); 1106 mCaller.sendMessage(msg); 1107 } 1108 1109 public void setDisplayPadding(Rect padding) { 1110 Message msg = mCaller.obtainMessageO(DO_SET_DISPLAY_PADDING, padding); 1111 mCaller.sendMessage(msg); 1112 } 1113 1114 public void setVisibility(boolean visible) { 1115 Message msg = mCaller.obtainMessageI(MSG_VISIBILITY_CHANGED, 1116 visible ? 1 : 0); 1117 mCaller.sendMessage(msg); 1118 } 1119 1120 public void dispatchPointer(MotionEvent event) { 1121 if (mEngine != null) { 1122 mEngine.dispatchPointer(event); 1123 } else { 1124 event.recycle(); 1125 } 1126 } 1127 1128 public void dispatchWallpaperCommand(String action, int x, int y, 1129 int z, Bundle extras) { 1130 if (mEngine != null) { 1131 mEngine.mWindow.dispatchWallpaperCommand(action, x, y, z, extras, false); 1132 } 1133 } 1134 1135 public void reportShown() { 1136 if (!mShownReported) { 1137 mShownReported = true; 1138 try { 1139 mConnection.engineShown(this); 1140 } catch (RemoteException e) { 1141 Log.w(TAG, "Wallpaper host disappeared", e); 1142 return; 1143 } 1144 } 1145 } 1146 1147 public void destroy() { 1148 Message msg = mCaller.obtainMessage(DO_DETACH); 1149 mCaller.sendMessage(msg); 1150 } 1151 1152 public void executeMessage(Message message) { 1153 switch (message.what) { 1154 case DO_ATTACH: { 1155 try { 1156 mConnection.attachEngine(this); 1157 } catch (RemoteException e) { 1158 Log.w(TAG, "Wallpaper host disappeared", e); 1159 return; 1160 } 1161 Engine engine = onCreateEngine(); 1162 mEngine = engine; 1163 mActiveEngines.add(engine); 1164 engine.attach(this); 1165 return; 1166 } 1167 case DO_DETACH: { 1168 mActiveEngines.remove(mEngine); 1169 mEngine.detach(); 1170 return; 1171 } 1172 case DO_SET_DESIRED_SIZE: { 1173 mEngine.doDesiredSizeChanged(message.arg1, message.arg2); 1174 return; 1175 } 1176 case DO_SET_DISPLAY_PADDING: { 1177 mEngine.doDisplayPaddingChanged((Rect) message.obj); 1178 } 1179 case MSG_UPDATE_SURFACE: 1180 mEngine.updateSurface(true, false, false); 1181 break; 1182 case MSG_VISIBILITY_CHANGED: 1183 if (DEBUG) Log.v(TAG, "Visibility change in " + mEngine 1184 + ": " + message.arg1); 1185 mEngine.doVisibilityChanged(message.arg1 != 0); 1186 break; 1187 case MSG_WALLPAPER_OFFSETS: { 1188 mEngine.doOffsetsChanged(true); 1189 } break; 1190 case MSG_WALLPAPER_COMMAND: { 1191 WallpaperCommand cmd = (WallpaperCommand)message.obj; 1192 mEngine.doCommand(cmd); 1193 } break; 1194 case MSG_WINDOW_RESIZED: { 1195 final boolean reportDraw = message.arg1 != 0; 1196 mEngine.mOutsets.set((Rect) message.obj); 1197 mEngine.updateSurface(true, false, reportDraw); 1198 mEngine.doOffsetsChanged(true); 1199 } break; 1200 case MSG_WINDOW_MOVED: { 1201 // Do nothing. What does it mean for a Wallpaper to move? 1202 } break; 1203 case MSG_TOUCH_EVENT: { 1204 boolean skip = false; 1205 MotionEvent ev = (MotionEvent)message.obj; 1206 if (ev.getAction() == MotionEvent.ACTION_MOVE) { 1207 synchronized (mEngine.mLock) { 1208 if (mEngine.mPendingMove == ev) { 1209 mEngine.mPendingMove = null; 1210 } else { 1211 // this is not the motion event we are looking for.... 1212 skip = true; 1213 } 1214 } 1215 } 1216 if (!skip) { 1217 if (DEBUG) Log.v(TAG, "Delivering touch event: " + ev); 1218 mEngine.onTouchEvent(ev); 1219 } 1220 ev.recycle(); 1221 } break; 1222 default : 1223 Log.w(TAG, "Unknown message type " + message.what); 1224 } 1225 } 1226 } 1227 1228 /** 1229 * Implements the internal {@link IWallpaperService} interface to convert 1230 * incoming calls to it back to calls on an {@link WallpaperService}. 1231 */ 1232 class IWallpaperServiceWrapper extends IWallpaperService.Stub { 1233 private final WallpaperService mTarget; 1234 1235 public IWallpaperServiceWrapper(WallpaperService context) { 1236 mTarget = context; 1237 } 1238 1239 @Override 1240 public void attach(IWallpaperConnection conn, IBinder windowToken, 1241 int windowType, boolean isPreview, int reqWidth, int reqHeight, Rect padding) { 1242 new IWallpaperEngineWrapper(mTarget, conn, windowToken, 1243 windowType, isPreview, reqWidth, reqHeight, padding); 1244 } 1245 } 1246 1247 @Override 1248 public void onCreate() { 1249 super.onCreate(); 1250 } 1251 1252 @Override 1253 public void onDestroy() { 1254 super.onDestroy(); 1255 for (int i=0; i<mActiveEngines.size(); i++) { 1256 mActiveEngines.get(i).detach(); 1257 } 1258 mActiveEngines.clear(); 1259 } 1260 1261 /** 1262 * Implement to return the implementation of the internal accessibility 1263 * service interface. Subclasses should not override. 1264 */ 1265 @Override 1266 public final IBinder onBind(Intent intent) { 1267 return new IWallpaperServiceWrapper(this); 1268 } 1269 1270 /** 1271 * Must be implemented to return a new instance of the wallpaper's engine. 1272 * Note that multiple instances may be active at the same time, such as 1273 * when the wallpaper is currently set as the active wallpaper and the user 1274 * is in the wallpaper picker viewing a preview of it as well. 1275 */ 1276 public abstract Engine onCreateEngine(); 1277 1278 @Override 1279 protected void dump(FileDescriptor fd, PrintWriter out, String[] args) { 1280 out.print("State of wallpaper "); out.print(this); out.println(":"); 1281 for (int i=0; i<mActiveEngines.size(); i++) { 1282 Engine engine = mActiveEngines.get(i); 1283 out.print(" Engine "); out.print(engine); out.println(":"); 1284 engine.dump(" ", fd, out, args); 1285 } 1286 } 1287} 1288