AlarmManager和WakeLock

Question

我想在我的活动中使用一个报警管理器.我在这个主要活动的onPause方法中设置了一个警报,

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.onPause和onResume方法属于它.

我还在onResume方法中使用唤醒锁来防止发生睡眠模式.

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();

代码的主要目的是在特定时间再次启动我的主要活动(namaz_vakti_activitiy).如果设备未处于睡眠模式,则代码运行良好.但是,如果它处于睡眠模式,则会出错并停止工作.我认为解决方案很简单,而且我处于代码阻塞状态.

Answer 1

现在,下面的代码完美无缺.

• alarmmanager工作得很好.但是,它不在屏幕上,所以我必须使用唤醒锁
• alarmmanager唤醒设备(你是绝对正确的,黄),但活动无法获得焦点.所以我必须定义一个新行(Android 2.0或更高版本支持这些标志:getWindow().addFlags(WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD| WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);

汇总代码如下.

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();