public void schedule()
{
Long time = new GregorianCalendar().getTimeInMillis()+10*1000;
Intent intent = new Intent(getActivity(), AlarmReceiver.class);
AlarmManager alarmManager = (AlarmManager) getActivity().getSystemService(Context.ALARM_SERVICE);
alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, time, 10*1000, PendingIntent.getBroadcast(getActivity(), 1, intent, PendingIntent.FLAG_UPDATE_CURRENT));
}
以上是我在 fragment 中的方法。也在 Activity 中尝试过。奇怪的是,这段代码适用于一个空的测试项目。我在这里看到的问题是最后一部分
alarmManager.setInexactRepeating()
不启动 AlarmReceiver.class
一点也不。我在这里做错了什么?
我的 list 文件:
<receiver android:name=".AlarmReceiver"/>
<uses-permission android:name="com.android.alarm.permission.SET_ALARM"/>
也是我的接收器:
public class AlarmReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent){
Toast.makeText(context, "Alarm Triggered and SMS Sent", Toast.LENGTH_LONG).show();
}
}
最佳答案
因为 setInexactRepeating。使用 setRepeating 它将在正确的时间进行处理。
代替:
setInexactRepeating
利用
setRepeating
setInexactRepeating,对操作系统和电池友好,它将所有要在警报接收上完成的工作批量处理并一个接一个地工作,而 setRepeating 会立即触发警报另请注意:一旦手机重新启动,警报就会消失,您可能必须实现启动广播接收器以使其持久化。确保您不执行该运行时,您需要在 Manifest 中实现它,否则当您的应用程序不在后台时,您将不会收到任何广播。
一个小例子:
这是工作代码。它每 10 分钟唤醒一次 CPU,直到手机关机。
添加到 Manifest.xml:
...
<uses-permission android:name="android.permission.WAKE_LOCK"></uses-permission>
...
<receiver android:process=":remote" android:name="Alarm"></receiver>
...
代码:
package YourPackage;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.PowerManager;
import android.widget.Toast;
public class Alarm extends BroadcastReceiver
{
@Override
public void onReceive(Context context, Intent intent)
{
PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "");
wl.acquire();
// Put here YOUR code.
Toast.makeText(context, "Alarm !!!!!!!!!!", Toast.LENGTH_LONG).show(); // For example
wl.release();
}
public void SetAlarm(Context context)
{
AlarmManager am=(AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
Intent i = new Intent(context, Alarm.class);
PendingIntent pi = PendingIntent.getBroadcast(context, 0, i, 0);
am.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 1000 * 60 * 10, pi); // Millisec * Second * Minute
}
public void CancelAlarm(Context context)
{
Intent intent = new Intent(context, Alarm.class);
PendingIntent sender = PendingIntent.getBroadcast(context, 0, intent, 0);
AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
alarmManager.cancel(sender);
}
}
设置服务警报:
package YourPackage;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.os.IBinder;
public class YourService extends Service
{
Alarm alarm = new Alarm();
public void onCreate()
{
super.onCreate();
}
public void onStart(Context context,Intent intent, int startId)
{
alarm.SetAlarm(context);
}
@Override
public IBinder onBind(Intent intent)
{
return null;
}
}
如果您想在手机开机时设置重复闹钟:向 Manifest.xml 添加权限:
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"></uses-permission>
...
<receiver android:name=".AutoStart">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED"></action>
</intent-filter>
</receiver>
...
并创建新类:
package YourPackage;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
public class AutoStart extends BroadcastReceiver
{
Alarm alarm = new Alarm();
@Override
public void onReceive(Context context, Intent intent)
{
if (intent.getAction().equals("android.intent.action.BOOT_COMPLETED"))
{
alarm.SetAlarm(context);
}
}
}