Question

我已经阅读过这个问题的大多数帖子，但仍然无法让我的实施工作，你能帮忙吗？

基本上我想从一个Activity中启动一个BroadcastReceiver，每隔10秒做一次事。所以我设置了警报，但代码实际上从未到达“onReceive（）”...我无法发现我的代码与其他示例有任何区别，你能看一下吗？

还要提一下，我没有在清单文件中放置接收器，因为我知道不需要它，因为我在活动中注册它。

谢谢！

package alarm.in;

import alarm.in.activity.R;
import android.app.Activity;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.os.PowerManager;
import android.util.Log;
import android.view.View;
import android.widget.TextView;

public class activityActivity extends Activity {

    private Alarm alarm;  


    private static final String TAG = "AlarmInActivity";
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        alarm = new Alarm();           
    }


    public void onResume() {
        super.onResume();
        IntentFilter filter = new IntentFilter();
        filter.addAction(ALARM_SERVICE);
        registerReceiver(alarm, filter);
    }

    public void onPause() {
        super.onPause();
        this.unregisterReceiver(alarm);
    }

    public void setAlarm(View view){
        alarm.SetAlarm(getBaseContext(),1,10);             
    }

    public void cancelAlarm(View view){     
        alarm.CancelAlarm(getBaseContext());                    
    }


    private 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();

            Log.d(TAG, "Alarm Worked!");     
            wl.release();
        }

        public void SetAlarm(Context context, int minutes, int seconds)
         {
             AlarmManager am=(AlarmManager)context.getSystemService(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 * seconds * minutes, pi); // Millisec * Second * Minute
             Log.d(TAG, "AlarmSet");         
         }

         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(ALARM_SERVICE);
             alarmManager.cancel(sender);
             Log.d(TAG, "AlarmCancel");    
         }

    }


}

Answer 1

您注册了接收者，但忘记将动作发送给接收者：

Intent intent = new Intent(ALARM_SERVICE);
sendBroadcast(intent);

从Activity中启动广播接收器

1 个答案: