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));
}
上面是我在片段中的方法。也在活动中尝试过。奇怪的是,这段代码适用于空的测试项目。我在这里看到的问题是,最后一部分alarmManager.setInexactRepeating()
根本没有启动AlarmReceiver.class
。
我在这里做错了什么?
我的清单文件:
<receiver android:name=".AlarmReceiver"/>
<uses-permission android:name="com.android.alarm.permission.SET_ALARM"/>
也是我的接收者:
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();
}
}
答案 0 :(得分:7)
因为setInexactRepeating。使用setRepeating,它将在合适的时间处理。
而不是:
setInexactRepeating
使用
setRepeating
setInexactRepeating,是操作系统和电池友好的,它将所有要完成的工作批量接收到报警接收并逐个工作,同时setRepeating立即触发报警
另请注意:重新启动电话后会擦除警报,您可能必须实施启动广播接收器以使其持久。确保你没有那个运行时,你需要在Manifest中实现它,当你的应用程序不在后台你不会收到任何广播。
这是有效的代码。它会每隔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);
}
}
从服务设置闹钟:
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;
}
}
如果您想在电话启动时重复设置警报:
添加Manifest.xml的权限:
<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>
...
创建新课程:
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);
}
}
}