cancelAlarm方法实际上并没有取消我的AlarmManager
问题描述:
我已经使用这个cancelAlarm
方法从栈上的另一个有信誉的答案,它没有完成工作,我不知道为什么这不起作用的想法。cancelAlarm方法实际上并没有取消我的AlarmManager
我有一个活动,其中一个按钮将启动一个警报,每隔一段时间就会关闭。然后我有另一个按钮,将取消该警报。下面是按钮第一:
start.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
setupAlarm(10);
}
});
stop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
try{
cancelAlarm(ALARM_ID);
} catch(Exception e){
Toast.makeText(getApplicationContext(), "ERROR", Toast.LENGTH_SHORT).show();
}
}
});
这里是我的setupAlarm
和cancelAlarm
方法:
private void setupAlarm(int seconds) {
AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
Intent i = new Intent(getBaseContext(), AlarmReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(
MainActivity.this, ALARM_ID, i, PendingIntent.FLAG_UPDATE_CURRENT);
Calendar t = Calendar.getInstance();
t.setTimeInMillis(System.currentTimeMillis());
int interval = seconds*1000;
am.setRepeating(AlarmManager.RTC_WAKEUP, t.getTimeInMillis(), interval, pendingIntent);
MainActivity.this.finish();
}
private void cancelAlarm(int alarmId){
Intent i = new Intent(getBaseContext(), AlarmManager.class);
PendingIntent sender = PendingIntent.getBroadcast(MainActivity.this, alarmId, i, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.cancel(sender);
sender.cancel();
}
我记得,使具有相同ID的另一个警报管理器,并呼吁PendingIntent
alarmManager.cancel(sender);
但它不看起来什么都不做,因为我的服务无论如何都会重新开始。
AlarmReciever类:
public class AlarmReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent)
{
Context oAppContext = context.getApplicationContext();
if (oAppContext == null) {
oAppContext = context;
}
Intent serviceIntent = new Intent(oAppContext, MyService.class);
oAppContext.startService(serviceIntent);
}
}
为MyService类:
public class MyService extends Service implements SensorEventListener{
private PowerManager.WakeLock wakeLock;
Sensor mSensor;
SensorManager mSensorManager;
String toastString = "";
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate(){
mSensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);
mSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
mSensorManager.registerListener(this, mSensor, SensorManager.SENSOR_DELAY_NORMAL);
PowerManager mgr = (PowerManager) getApplicationContext().getSystemService(Context.POWER_SERVICE);
wakeLock = mgr.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "MyWakeLock");
wakeLock.acquire();
Toast.makeText(this, "onCreate Successful", Toast.LENGTH_SHORT).show();
}
@Override
public int onStartCommand(Intent intent, int flags, int startid) {
Toast.makeText(this, "onStart Successful", Toast.LENGTH_SHORT).show();
return Service.START_STICKY;
}
@Override
public void onSensorChanged(SensorEvent event) {
//record some data from the accelerometer
quit();
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
private void quit(){
mSensorManager.unregisterListener(MyService.this);
wakeLock.release();
this.stopSelf();
}
}
我不停的从我的MyService
类获得祝酒词告诉我,我onCreate
和onStart
成功实例,即使打完电话后我的cancelAlarm
方法。
答
使用创建时使用的相同PendingIntent
Alarm
。
Intent i = new Intent(getBaseContext(), AlarmReceiver.class);
更新cancelAlarm()
如下方法:在你的Intent
使用AlarmReceiver.class
而不是AlarmManager.class
private void cancelAlarm(int alarmId){
Intent i = new Intent(getBaseContext(), AlarmReceiver.class);
PendingIntent sender = PendingIntent.getBroadcast(MainActivity.this, alarmId, i, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.cancel(sender);
sender.cancel();
}
希望这将有助于〜
您可以发布您AlarmReceiver代码? –
和您的MyService类 –
@ AndrewEl-Masry添加了 – cjnash