Android:如何在小窗口中运行其他应用

<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

WindowManager.LayoutParams params = new WindowManager.LayoutParams(
    WindowManager.LayoutParams.WRAP_CONTENT,
    WindowManager.LayoutParams.WRAP_CONTENT,
    WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY,
    WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
    PixelFormat.TRANSLUCENT
);

WindowManager windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
View floatingView = LayoutInflater.from(this).inflate(R.layout.floating_view, null);

windowManager.addView(floatingView, params);

ActivityManager activityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
List<ActivityManager.RunningTaskInfo> runningTasks = activityManager.getRunningTasks(Integer.MAX_VALUE);

for (ActivityManager.RunningTaskInfo taskInfo : runningTasks) {
    if (taskInfo.topActivity.getPackageName().equals("com.example.targetapp")) {
        activityManager.moveTaskToFront(taskInfo.id, ActivityManager.MOVE_TASK_WITH_HOME);
        break;
    }
}