Android 安排任务时，报警管理器未按预期工作

我目前正在使用Android Alarm Manager，并找到了一个工作示例。但在我的情况下，它不能正常工作。让我解释一下。基本上，我的目标是每5分钟从MainActivity执行一个方法。为此，我使用Alarm Manager来安排该任务

基本上这就是工作内容：

AlarmReceiver.java

public class AlarmReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        context.sendBroadcast(new Intent("SERVICE_TEMPORARY_STOPPED"));
    }
}

public class MainActivity extends Activity{
    private PendingIntent pendingIntent;
    private AlarmManager manager;

    BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            Toast.makeText(context, "I'm running", Toast.LENGTH_SHORT).show();
        }
    };


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Intent alarmIntent = new Intent(this, AlarmReceiver.class);
        pendingIntent = PendingIntent.getBroadcast(this, 0, alarmIntent, 0);
        registerReceiver(broadcastReceiver, new IntentFilter("SERVICE_TEMPORARY_STOPPED"));

        Button button = (Button) findViewById(R.id.button);

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startAlarm();
            }
        });
    }


    public void startAlarm() {
        manager = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
        int interval = 300000;
        manager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), interval, pendingIntent);
        Log.d(TAG, "Alarm Set");
    }
}

public class AlarmReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        context.sendBroadcast(new Intent("SERVICE_TEMPORARY_STOPPED"));

        long repeatCount = PreferenceManager.getDefaultSharedPreferences(context).getLong("REPEAT_COUNT", 0L);

        repeatCount++;

        PreferenceManager.getDefaultSharedPreferences (context).edit().putLong("REPEAT_COUNT", repeatCount).apply()

        AlarmManager manager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);

        Intent alarmIntent = new Intent(this, AlarmReceiver.class);
        pendingIntent = PendingIntent.getBroadcast(this, 0, alarmIntent, 0);
        manager.setExact(AlarmManager.RTC_WAKEUP, (repeatCount *System.currentTimeMillis()),pendingIntent);
    }
}

MainActivity.java

public class AlarmReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        context.sendBroadcast(new Intent("SERVICE_TEMPORARY_STOPPED"));
    }
}

public class MainActivity extends Activity{
    private PendingIntent pendingIntent;
    private AlarmManager manager;

    BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            Toast.makeText(context, "I'm running", Toast.LENGTH_SHORT).show();
        }
    };


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Intent alarmIntent = new Intent(this, AlarmReceiver.class);
        pendingIntent = PendingIntent.getBroadcast(this, 0, alarmIntent, 0);
        registerReceiver(broadcastReceiver, new IntentFilter("SERVICE_TEMPORARY_STOPPED"));

        Button button = (Button) findViewById(R.id.button);

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startAlarm();
            }
        });
    }


    public void startAlarm() {
        manager = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
        int interval = 300000;
        manager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), interval, pendingIntent);
        Log.d(TAG, "Alarm Set");
    }
}

public class AlarmReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        context.sendBroadcast(new Intent("SERVICE_TEMPORARY_STOPPED"));

        long repeatCount = PreferenceManager.getDefaultSharedPreferences(context).getLong("REPEAT_COUNT", 0L);

        repeatCount++;

        PreferenceManager.getDefaultSharedPreferences (context).edit().putLong("REPEAT_COUNT", repeatCount).apply()

        AlarmManager manager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);

        Intent alarmIntent = new Intent(this, AlarmReceiver.class);
        pendingIntent = PendingIntent.getBroadcast(this, 0, alarmIntent, 0);
        manager.setExact(AlarmManager.RTC_WAKEUP, (repeatCount *System.currentTimeMillis()),pendingIntent);
    }
}

一切都很好。每300000毫秒（5分钟）执行一次“我正在运行”Toast。

AlarmReceiver

类向我的主要活动发送广播，并显示消息“SERVICE\u TEMPORARY\u STOPPED”。我已经通过

registerReceiver（broadcastReceiver，new IntentFilter（“SERVICE_TEMPORARY_STOPPED”））在我的MainActivity中注册了该消息。但是，当我添加另一个方法时，比如在broadcastReceiver中添加
stopAlarm（）
，它将在5分钟后停止报警，时间间隔（5分钟）不再应用。大约10秒钟后，它会呼叫广播接收器并停止报警。这就是问题所在。请看一下
stop（）
方法，以及我如何在
广播接收器上调用它：

BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        Toast.makeText(context, "I'm running", Toast.LENGTH_SHORT).show();
        stopAlarm();
    }
};

public void stopAlarm() {
    Intent alarmIntent = new Intent(this, AlarmReceiver.class);
    pendingIntent = PendingIntent.getBroadcast(this, 0, alarmIntent, 0);
    manager = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
    manager.cancel(pendingIntent);
    Log.d(TAG, "Alarm Cancelled");
}

有什么线索吗？
AlarmManager.setRepeating在不同的android版本上无法正常工作

请尝试设置精确值。它不会重复，但您可以实现如下所述的重复功能：

更新了AlarmReceiver.java

public class AlarmReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        context.sendBroadcast(new Intent("SERVICE_TEMPORARY_STOPPED"));
    }
}

public class MainActivity extends Activity{
    private PendingIntent pendingIntent;
    private AlarmManager manager;

    BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            Toast.makeText(context, "I'm running", Toast.LENGTH_SHORT).show();
        }
    };


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Intent alarmIntent = new Intent(this, AlarmReceiver.class);
        pendingIntent = PendingIntent.getBroadcast(this, 0, alarmIntent, 0);
        registerReceiver(broadcastReceiver, new IntentFilter("SERVICE_TEMPORARY_STOPPED"));

        Button button = (Button) findViewById(R.id.button);

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startAlarm();
            }
        });
    }


    public void startAlarm() {
        manager = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
        int interval = 300000;
        manager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), interval, pendingIntent);
        Log.d(TAG, "Alarm Set");
    }
}

public class AlarmReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        context.sendBroadcast(new Intent("SERVICE_TEMPORARY_STOPPED"));

        long repeatCount = PreferenceManager.getDefaultSharedPreferences(context).getLong("REPEAT_COUNT", 0L);

        repeatCount++;

        PreferenceManager.getDefaultSharedPreferences (context).edit().putLong("REPEAT_COUNT", repeatCount).apply()

        AlarmManager manager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);

        Intent alarmIntent = new Intent(this, AlarmReceiver.class);
        pendingIntent = PendingIntent.getBroadcast(this, 0, alarmIntent, 0);
        manager.setExact(AlarmManager.RTC_WAKEUP, (repeatCount *System.currentTimeMillis()),pendingIntent);
    }
}

在这里，我们维护一个repeatCount&变量（基于首选项），并通过使用repeatCount*System.currentTimeMillis（）计算nextAlarmTime，在AlarmReceiver&schedule alarm中再次增加它