从锁定屏幕启动时，Android活动会打开两次

Question

伙计们，上周我尝试了一些android开发，目前我遇到了以下错误：我正在后台运行一个带有服务的计时器。时间到了，即使手机锁定，活动也会打开。有了以下代码，虽然没有锁定，但一切都很好。但当从锁定的屏幕打开时，它总是会打开两次。：/

我在onCreate中添加了这个，使其从锁定屏幕打开。

protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//allow window to be popped up while in lock screen
Window window = this.getWindow();
window.addFlags(WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD);
window.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
window.addFlags(WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);
setContentView(R.layout.activity_entry);

我通过一个意向从服务中打开活动。

callEntryActivityIntent = new Intent(this, EntryActivity.class);
callEntryActivityIntent.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
pendingIntent = PendingIntent.getActivity(this, 0, callEntryActivityIntent, 0);

并且当定时器结束时->startActivity(callEntryActivityIntent(；

也许有人有个主意。我对安卓系统的开发真的很陌生，两周前就开始了。

Answer 1

I am new too, but I guess **android activity cycle** has an answer:
+ The user opens an activity.
- onCreated() is called
- onStart() is called
- onResume() is called  
+ The user LOCKS the device 
- onPause() is called
- onDestroy() is called
- onCreate() is called
- onStart() is called
- onResume() is called 
- onPause() is called   
+ The user UNLOCKS the device
- onResume() is called
- onDestroy() is called
- onCreate() is called
- onStart() is called
- onResume() is called.
Hope this helps