AlarmManager和WakeLock

本文介绍了AlarmManager和WakeLock的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我想用一个报警经理在我的活动。我设置了一个报警的主要活动的onPause方法是这样，

I want to use an alarm manager in my activity. I set up an alarm at the onPause method of main activity like this,

Intent intent= new Intent(namaz_vakti_activity.this, namaz_vakti_activity.class); PendingIntent sender = PendingIntent.getActivity(this, 1234567, intent,Intent.FLAG_ACTIVITY_NEW_TASK); AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE); eltime=Calendar.getInstance().getTime().getHours()*60+Calendar.getInstance().getTime().getMinutes(); eltime=(long)(Sun_Rise*60)-eltime; if (eltime<0) eltime=eltime+24*60; eltime=eltime-pre_time; if (eltime<=0) eltime=eltime+24*60; if (uyandirma) { am.set(AlarmManager.RTC_WAKEUP, Calendar.getInstance().getTimeInMillis()+eltime*60000, sender); Toast.makeText(this,"Uyandirma saati "+ConvertTime(Sun_Rise-pre_time/60.0),Toast.LENGTH_SHORT).show(); } else { am.cancel(sender); }

namaz_vakti_activity是我的主要活动。在的onPause和onResume方法属于它。

namaz_vakti_activity is my main activity. the onPause and onResume methods belong to it.

我还使用了wakelock在onResume方法prevent睡着模式出现。

I also use a wakelock at onResume method to prevent asleep mode to occur.

pm = (PowerManager)this.getSystemService(Context.POWER_SERVICE); wl = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK |PowerManager.ACQUIRE_CAUSES_WAKEUP | PowerManager.ON_AFTER_RELEASE,"namaz_vakti_activity"); wl.acquire();

的code的主要目的是启动我的主要活动（namaz_vakti_activitiy）再次在特定的时间。如果该设备不处于睡眠模式中的code效果很好。然而，如果它是在睡着模式下，它提供了一个错误并停止工作。我认为，解决办法很简单，我在code blidness。

The main purpose of the code is start my main activity (namaz_vakti_activitiy) again at a specific time. If the device is not in asleep mode the code works well. However if it is in asleep mode it gives an error and stops working. I think the solution is simple, and I am in code blidness.

推荐答案

现在的低于code完美的作品。

Now the below code works perfectly.

• alarmmanager效果很好。但是，它并没有在屏幕上，所以我必须使用wakelock
• alarmmanager唤醒装置（你是绝对正确的，黄），但活动不能得到焦点。所以我必须定义一个新的生产线（Android 2.0的或更高版本支持这些标志： getWindow（）addFlags（WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD | 窗口管理器。 LayoutParams.FLAG_TURN_SCREEN_ON）;

• alarmmanager works well. However, it does not on the screen, so I have to use wakelock
• alarmmanager wakes the device (you are absolutly right, huang), but the activity can not get focus. So I have to define a new line (Android 2.0 or above supports these flags: getWindow().addFlags(WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);

在总结code是如下。

The summarized code is below.

public void onCreate(Bundle savedInstanceState) ... getWindow().addFlags( WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD| WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON| WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); ... protected void onResume() ... //pm = (PowerManager)this.getSystemService(Context.POWER_SERVICE); //wl = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK,"namaz_vakti_activity"); //wl.acquire(); MPX=MediaPlayer.create(this, R.raw.azan1); ... if (eltime==0 && uyandirma && !MPX.isPlaying()) { MPX.setVolume(1,1); MPX.start(); } protected void onPause() ... Intent intent= new Intent(namaz_vakti_activity.this, namaz_vakti_activity.class); PendingIntent sender = PendingIntent.getActivity(this, 1234567, intent,Intent.FLAG_ACTIVITY_NEW_TASK); AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE); eltime=Calendar.getInstance().getTime().getHours()*60+Calendar.getInstance().getTime().getMinutes(); eltime=(long)(Sun_Rise*60)-eltime; if (eltime<0) eltime=eltime+24*60; eltime=eltime-pre_time; if (eltime<=0) eltime=eltime+24*60; if (uyandirma) { am.set(AlarmManager.RTC_WAKEUP, Calendar.getInstance().getTimeInMillis()+eltime*60000, sender); Toast.makeText(this,"Uyandirma saati "+ConvertTime(Sun_Rise-pre_time/60.0),Toast.LENGTH_SHORT).show(); } else { am.cancel(sender); } if (MPX.isPlaying()) { MPX.pause(); MPX.release(); } //if (wl.isHeld()) wl.release();