Question

嘿我在那里尝试使用alaram经理每15分钟运行一次android后台服务，但我无法这样做，我不知道是什么错误，我无法弄清楚我的代码中有什么错误工作

尝试{

        //Create a new PendingIntent and add it to the AlarmManager
        Intent intent = new Intent(this, RingAlarm.class);
        PendingIntent pendingIntent = PendingIntent.getActivity(this,
            12345, intent, PendingIntent.FLAG_CANCEL_CURRENT);
        AlarmManager am =
            (AlarmManager)getSystemService(Activity.ALARM_SERVICE);
        am.setRepeating(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime(),
                3000,pendingIntent);

      } catch (Exception e) {
          Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_LONG).show();

      }




RingAlaram.class
public class RingAlarm extends Service { 
      public void onCreate() {  
                  Toast.makeText(getApplicationContext(), "hi there", Toast.LENGTH_LONG).show();
                }

        @Override
        public IBinder onBind(Intent arg0) {
            // TODO Auto-generated method stub
            return null;
        }



}

并持续我的清单

   <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.alarmmanagerexample.AlarmManagerExample"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
          <service 
            android:name=".RingAlarm"
            android:exported="false" />
    </application>

Answer 1

您应该使用getService代替getActivity并传递应用程序上下文（getApplicationContext）而不是活动上下文（this）。

    //Create a new PendingIntent and add it to the AlarmManager
    Intent intent = new Intent(getApplicationContext(), RingAlarm.class);
    PendingIntent pendingIntent = PendingIntent.getService(getApplicationContext(), 12345, intent, PendingIntent.FLAG_UPDATE_CURRENT);
    AlarmManager am = (AlarmManager)getSystemService(Activity.ALARM_SERVICE);
    am.setRepeating(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime(), 3000, pendingIntent);

RingAlaram.class

public class RingAlarm extends Service { 
    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        Toast.makeText(getApplicationContext(), "hi there", Toast.LENGTH_LONG).show();
    }

    @Override
    public IBinder onBind(Intent arg0) {
        // TODO Auto-generated method stub
        return null;
    }
}

还将标志设置为PendingIntent.FLAG_UPDATE_CURRENT而不是CANCEL 将清单上的服务声明设置为<packagename>.RingAlarm可能是com.example.alarmmanagerexample.RingAlarm（我不了解您的项目结构）。

Answer 2

将getActivity更改为getService

Intent intent = new Intent(this, RingAlarm.class);
        PendingIntent pendingIntent = PendingIntent.getService(this,
            12345, intent, PendingIntent.FLAG_CANCEL_CURRENT);
        AlarmManager am =
            (AlarmManager)getSystemService(Activity.ALARM_SERVICE);
        am.setRepeating(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime(),
                3000,pendingIntent);

      } catch (Exception e) {
          Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_LONG).show();

      }

android报警管理器每15分钟运行一次后台服务

2 个答案: