StartingWindow显示流程 - 安卓R

接着ATMS启动Activity流程中frameworks/base/services/core/java/com/android/server/wm/ActivityStack.java的startActivityLocked方法中调用了frameworks/base/services/core/java/com/android/server/wm/ActivityRecord.java的showStartingWindow方法：

    void showStartingWindow(ActivityRecord prev, boolean newTask, boolean taskSwitch) {......final boolean shown = addStartingWindow(packageName, theme,compatInfo, nonLocalizedLabel, labelRes, icon, logo, windowFlags,prev != null ? prev.appToken : null, newTask, taskSwitch, isProcessRunning(),allowTaskSnapshot(),mState.ordinal() >= STARTED.ordinal() && mState.ordinal() <= STOPPED.ordinal());if (shown) {mStartingWindowState = STARTING_WINDOW_SHOWN;}}

调用了ActivityRecord的addStartingWindow方法：

    boolean addStartingWindow(String pkg, int theme, CompatibilityInfo compatInfo,CharSequence nonLocalizedLabel, int labelRes, int icon, int logo, int windowFlags,IBinder transferFrom, boolean newTask, boolean taskSwitch, boolean processRunning,boolean allowTaskSnapshot, boolean activityCreated) {......final ActivityManager.TaskSnapshot snapshot =mWmService.mTaskSnapshotController.getSnapshot(task.mTaskId, task.mUserId,false /* restoreFromDisk */, false /* isLowResolution */);final int type = getStartingWindowType(newTask, taskSwitch, processRunning,allowTaskSnapshot, activityCreated, snapshot);if (type == STARTING_WINDOW_TYPE_SNAPSHOT) {......return createSnapshot(snapshot);}......// There is no existing starting window, and we don't want to create a splash screen, so// that's it!if (type != STARTING_WINDOW_TYPE_SPLASH_SCREEN) {

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