Android 從後臺進入前臺
阿新 • • 發佈：2019-01-07
public void moveTaskToFront(int taskId, int flags) {
try {ActivityManagerNative.getDefault().moveTaskToFront(taskId, flags);
} catch (RemoteException e) {
// System dead, we will be dead too soon!
}
//獲取ActivityManager
ActivityManager mAm = (ActivityManager) context.getSystemService(context.ACTIVITY_SERVICE);
//獲得當前執行的task
List<ActivityManager.RunningTaskInfo> taskList = mAm.getRunningTasks(100);
for(ActivityManager.RunningTaskInfo rti : taskList) {
//找到當前應用的task，並啟動task的棧頂activity，達到程式切換到前臺
if(rti.topActivity.getPackageName().equals(context.getPackageName())) {
mAm.moveTaskToFront(rti.id,0);
return;
}
}
//若沒有找到執行的task，使用者結束了task或被系統釋放，則重新啟動mainactivity
Intent resultIntent = newIntent(context, MainActivity.class);
resultIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK|Intent.FLAG_ACTIVITY_SINGLE_TOP);
context.startActivity(resultIntent);