.java）public final class WindowManagerGlobal {private static final String TAG = "WindowManager";/*** The user is navigating with keys (not the touch screen), so* navigational focus should be shown.*/public static final int RELAYOUT_RES_IN_TOUCH_MODE = 0x1;/*** This is the first time the window is being drawn,* so the client must call drawingFinished() when done*/public static final int RELAYOUT_RES_FIRST_TIME = 0x2;/*** The window manager has changed the surface from the last call.*/public static final int RELAYOUT_RES_SURFACE_CHANGED = 0x4;/*** The window manager is currently animating. It will call* IWindow.doneAnimating() when done.*/public static final int RELAYOUT_RES_ANIMATING = 0x8;/*** Flag for relayout: the client will be later giving* internal insets; as a result, the window will not impact other window* layouts until the insets are given.*/public static final int RELAYOUT_INSETS_PENDING = 0x1;/*** Flag for relayout: the client may be currently using the current surface,* so if it is to be destroyed as a part of the relayout the destroy must* be deferred until later. The client will call performDeferredDestroy()* when it is okay.*/public static final int RELAYOUT_DEFER_SURFACE_DESTROY = 0x2;public static final int ADD_FLAG_APP_VISIBLE = 0x2;public static final int ADD_FLAG_IN_TOUCH_MODE = RELAYOUT_RES_IN_TOUCH_MODE;public static final int ADD_OKAY = 0;public static final int ADD_BAD_APP_TOKEN = -1;public static final int ADD_BAD_SUBWINDOW_TOKEN = -2;public static final int ADD_NOT_APP_TOKEN = -3;public static final int ADD_APP_EXITING = -4;public static final int ADD_DUPLICATE_ADD = -5;public static final int ADD_STARTING_NOT_NEEDED = -6;public static final int ADD_MULTIPLE_SINGLETON = -7;public static final int ADD_PERMISSION_DENIED = -8;public static final int ADD_INVALID_DISPLAY = -9;/** M: [ALPS00044207] */public static final int ADD_INPUTCHANNEL_NOT_ALLOWED = -10;private static WindowManagerGlobal sDefaultWindowManager;private static IWindowManager sWindowManagerService;private static IWindowSession sWindowSession;private final Object mLock = new Object();private final ArrayList<View> mViews = new ArrayList<View>();private final ArrayList<ViewRootImpl> mRoots = new ArrayList<ViewRootImpl>();private final ArrayList<WindowManager.LayoutParams> mParams =new ArrayList<WindowManager.LayoutParams>();private final ArraySet<View> mDyingViews = new ArraySet<View>();private boolean mNeedsEglTerminate;private Runnable mSystemPropertyUpdater;private WindowManagerGlobal() {}public static WindowManagerGlobal getInstance() {synchronized (WindowManagerGlobal.class) {if (sDefaultWindowManager == null) {sDefaultWindowManager = new WindowManagerGlobal();}return sDefaultWindowManager;}}public static IWindowManager getWindowManagerService() {synchronized (WindowManagerGlobal.class) {if (sWindowManagerService == null) {sWindowManagerService = IWindowManager.Stub.asInterface(ServiceManager.getService("window"));}return sWindowManagerService;}}public static IWindowSession getWindowSession() {synchronized (WindowManagerGlobal.class) {if (sWindowSession == null) {try {InputMethodManager imm = InputMethodManager.getInstance();IWindowManager windowManager = getWindowManagerService();sWindowSession = windowManager.openSession(imm.getClient(), imm.getInputContext());float animatorScale = windowManager.getAnimationScale(2);ValueAnimator.setDurationScale(animatorScale);} catch (RemoteException e) {Log.e(TAG, "Failed to open window session", e);}}return sWindowSession;}}public static IWindowSession peekWindowSession() {synchronized (WindowManagerGlobal.class) {return sWindowSession;}}public String[] getViewRootNames() {synchronized (mLock) {final int numRoots = mRoots.size();String[] mViewRoots = new String[numRoots];for (int i = 0; i < numRoots; ++i) {mViewRoots[i] = getWindowName(mRoots.get(i));}return mViewRoots;}}public View getRootView(String name) {synchronized (mLock) {for (int i = mRoots.size() – 1; i >= 0; –i) {final ViewRootImpl root = mRoots.get(i);if (name.equals(getWindowName(root))) return root.getView();}}return null;}public void addView(View view, ViewGroup.LayoutParams params,Display display, Window parentWindow) {if (view == null) {throw new IllegalArgumentException("view must not be null");}if (display == null) {throw new IllegalArgumentException("display must not be null");}if (!(params instanceof WindowManager.LayoutParams)) {throw new IllegalArgumentException("Params must be WindowManager.LayoutParams");}final WindowManager.LayoutParams wparams = (WindowManager.LayoutParams)params;if (parentWindow != null) {parentWindow.adjustLayoutParamsForSubWindow(wparams);}ViewRootImpl root;View panelParentView = null;synchronized (mLock) {// Start watching for system property changes.if (mSystemPropertyUpdater == null) {mSystemPropertyUpdater = new Runnable() {@Override public void run() {synchronized (mLock) {for (int i = mRoots.size() – 1; i >= 0; –i) {mRoots.get(i).loadSystemProperties();}}}};SystemProperties.addChangeCallback(mSystemPropertyUpdater);}int index = findViewLocked(view, false);if (index >= 0) {if (mDyingViews.contains(view)) {// Don't wait for MSG_DIE to make it's way through root's queue.mRoots.get(index).doDie();} else {throw new IllegalStateException("View " + view+ " has already been added to the window manager.");}// The previous removeView() had not completed executing. Now it has.}// If this is a panel window, then find the window it is being// attached to for future reference.if (wparams.type >= WindowManager.LayoutParams.FIRST_SUB_WINDOW &&wparams.type <= WindowManager.LayoutParams.LAST_SUB_WINDOW) {final int count = mViews.size();for (int i = 0; i < count; i++) {if (mRoots.get(i).mWindow.asBinder() == wparams.token) {panelParentView = mViews.get(i);}}}root = new ViewRootImpl(view.getContext(), display);view.setLayoutParams(wparams);mViews.add(view);mRoots.add(root);mParams.add(wparams);}// do this last because it fires off messages to start doing thingstry {root.setView(view, wparams, panelParentView);} catch (RuntimeException e) {// BadTokenException or InvalidDisplayException, clean up.synchronized (mLock) {final int index = findViewLocked(view, false);if (index >= 0) {removeViewLocked(index, true);}}throw e;}}public void updateViewLayout(View view, ViewGroup.LayoutParams params) {if (view == null) {throw new IllegalArgumentException("view must not be null");}if (!(params instanceof WindowManager.LayoutParams)) {throw new IllegalArgumentException("Params must be WindowManager.LayoutParams");}final WindowManager.LayoutParams wparams = (WindowManager.LayoutParams)params;view.setLayoutParams(wparams);synchronized (mLock) {int index = findViewLocked(view, true);ViewRootImpl root = mRoots.get(index);mParams.remove(index);mParams.add(index, wparams);root.setLayoutParams(wparams, false);}}public void removeView(View view, boolean immediate) {if (view == null) {throw new IllegalArgumentException("view must not be null");}synchronized (mLock) {int index = findViewLocked(view, true);View curView = mRoots.get(index).getView();removeViewLocked(index, immediate);if (curView == view) {return;}throw new IllegalStateException("Calling with view " + view+ " but the ViewAncestor is attached to " + curView);}}public void closeAll(IBinder token, String who, String what) {synchronized (mLock) {int count = mViews.size();//Log.i("foo", "Closing all windows of " + token);for (int i = 0; i < count; i++) {//Log.i("foo", "@ " + i + " token " + mParams[i].token//+ " view " + mRoots[i].getView());if (token == null || mParams.get(i).token == token) {ViewRootImpl root = mRoots.get(i);//Log.i("foo", "Force closing " + root);if (who != null) {WindowLeaked leak = new WindowLeaked(what + " " + who + " has leaked window "+ root.getView() + " that was originally added here");leak.setStackTrace(root.getLocation().getStackTrace());Log.e(TAG, "", leak);}removeViewLocked(i, false);}}}}private void removeViewLocked(int index, boolean immediate) {ViewRootImpl root = mRoots.get(index);View view = root.getView();if (view != null) {InputMethodManager imm = InputMethodManager.getInstance();if (imm != null) {imm.windowDismissed(mViews.get(index).getWindowToken());}}boolean deferred = root.die(immediate);if (view != null) {view.assignParent(null);if (deferred) {mDyingViews.add(view);}}}void doRemoveView(ViewRootImpl root) {synchronized (mLock) {final int index = mRoots.indexOf(root);if (index >= 0) {mRoots.remove(index);mParams.remove(index);final View view = mViews.remove(index);mDyingViews.remove(view);}}}private int findViewLocked(View view, boolean required) {final int index = mViews.indexOf(view);if (required && index < 0) {throw new IllegalArgumentException("View=" + view + " not attached to window manager");}return index;}public void startTrimMemory(int level) {if (HardwareRenderer.isAvailable()) {// On low-end gfx devices we trim when memory is moderate;// on high-end devices we do this when low.if (level >= ComponentCallbacks2.TRIM_MEMORY_COMPLETE|| (level >= ComponentCallbacks2.TRIM_MEMORY_MODERATE&& !ActivityManager.isHighEndGfx())) {// Destroy all hardware surfaces and resources associated to// known windowssynchronized (mLock) {/// M:[ALPS01258050] make all view hardware layers can be destroyed.HardwareRenderer.setForceDestroyLayers(true);for (int i = mRoots.size() – 1; i >= 0; –i) {mRoots.get(i).destroyHardwareResources();}HardwareRenderer.setForceDestroyLayers(false);}// Force a full memory flushmNeedsEglTerminate = true;HardwareRenderer.startTrimMemory(ComponentCallbacks2.TRIM_MEMORY_COMPLETE);return;}HardwareRenderer.startTrimMemory(level);}}public void endTrimMemory() {HardwareRenderer.endTrimMemory();if (mNeedsEglTerminate) {ManagedEGLContext.doTerminate();mNeedsEglTerminate = false;}}public void trimLocalMemory() {synchronized (mLock) {for (int i = mRoots.size() – 1; i >= 0; –i) {mRoots.get(i).destroyHardwareLayers();}}}public void dumpGfxInfo(FileDescriptor fd) {FileOutputStream fout = new FileOutputStream(fd);PrintWriter pw = new FastPrintWriter(fout);try {synchronized (mLock) {final int count = mViews.size();pw.println("Profile data in ms:");for (int i = 0; i < count; i++) {ViewRootImpl root = mRoots.get(i);String name = getWindowName(root);pw.printf("\n\t%s", name);HardwareRenderer renderer =root.getView().mAttachInfo.mHardwareRenderer;if (renderer != null) {renderer.dumpGfxInfo(pw);}}pw.println("\nView hierarchy:\n");int viewsCount = 0;int displayListsSize = 0;int[] info = new int[2];for (int i = 0; i < count; i++) {ViewRootImpl root = mRoots.get(i);root.dumpGfxInfo(info);String name = getWindowName(root);pw.printf(" %s\n %d views, %.2f kB of display lists",name, info[0], info[1] / 1024.0f);HardwareRenderer renderer =root.getView().mAttachInfo.mHardwareRenderer;if (renderer != null) {pw.printf(", %d frames rendered", renderer.getFrameCount());}pw.printf("\n\n");viewsCount += info[0];displayListsSize += info[1];}pw.printf("\nTotal ViewRootImpl: %d\n", count);pw.printf("Total Views:%d\n", viewsCount);pw.printf("Total DisplayList: %.2f kB\n\n", displayListsSize / 1024.0f);}} finally {pw.flush();}}private static String getWindowName(ViewRootImpl root) {return root.mWindowAttributes.getTitle() + "/" +root.getClass().getName() + '@' + Integer.toHexString(root.hashCode());}public void setStoppedState(IBinder token, boolean stopped) {synchronized (mLock) {int count = mViews.size();for (int i = 0; i < count; i++) {if (token == null || mParams.get(i).token == token) {ViewRootImpl root = mRoots.get(i);root.setStopped(stopped);}}}}public void reportNewConfiguration(Configuration config) {synchronized (mLock) {int count = mViews.size();config = new Configuration(config);for (int i=0; i < count; i++) {ViewRootImpl root = mRoots.get(i);root.requestUpdateConfiguration(config);}}}/** @hide */public void changeCanvasOpacity(IBinder token, boolean opaque) {if (token == null) {return;}synchronized (mLock) {for (int i = mParams.size() – 1; i >= 0; –i) {if (mParams.get(i).token == token) {mRoots.get(i).changeCanvasOpacity(opaque);return;}}}}}final class WindowLeaked extends AndroidRuntimeException {public WindowLeaked(String msg) {super(msg);}}
，觉得自己做的到和不做的到，其实只在一念之间
