Android AlarmManager和服务问题

时间:2011-01-27 18:02:11

标签: android service alarm

我的应用中有一些文件,但现在只有3个很重要。这是一个提醒应用程序,具有警报声和通知。 我有一个maincode.java文件,其中包含一个复选框及其监听器。如果用户在chechbox中检查,则AlarmManager会向AlarmReceiver.java发送一个intent,它启动MyService.java。 MyService java包含有关播放声音的代码。代码是部分的。 MyService.java:

public void onCreate() {
    Toast.makeText(this, "My Service Created", Toast.LENGTH_LONG).show();
    Log.d(TAG, "onCreate");

    player = MediaPlayer.create(this, R.raw.sound);
    player.setLooping(false); // Set looping
}

@Override
public void onDestroy() {
    Toast.makeText(this, "My Service Stopped", Toast.LENGTH_LONG).show();
    Log.d(TAG, "onDestroy");
    player.stop();
}

@Override
public void onStart(Intent intent, int startid) {
    Toast.makeText(this, "My Service Started", Toast.LENGTH_LONG).show();
    Log.d(TAG, "onStart");
    player.start();
}

AlarmReceiver.java:

public void onCreate() {
    Toast.makeText(this, "My Service Created", Toast.LENGTH_LONG).show();
    Log.d(TAG, "onCreate");

    player = MediaPlayer.create(this, R.raw.sound);
    player.setLooping(false); // Set looping

maincode.java的重要部分:

    cb1 = (CheckBox) findViewById(R.id.CheckBox01);
    cb1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) 
        {           
            if (cb1.isChecked()) 
                {
                 if (GlobalVars.getHourOfDay() >= 0) 
                 {
                     Toast.makeText(maincode.this, "ok", Toast.LENGTH_SHORT).show();
                     rem1.setText(GlobalVars.getReminder1name());
                        Intent intent = new Intent(maincode.this, AlarmReceiver.class);
                        PendingIntent pendingIntent = PendingIntent.getBroadcast(bInsulinReminder.this, 0,
                          intent, PendingIntent.FLAG_UPDATE_CURRENT);
                        AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
                        Calendar cal = Calendar.getInstance();
                        cal.set(Calendar.HOUR_OF_DAY, GlobalVars.getHourOfDay());
                        cal.set(Calendar.MINUTE, GlobalVars.getMinute());
                        cal.set(Calendar.SECOND, 0);
                        cal.set(Calendar.MILLISECOND, 0);
                        alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis()+ 3000, 6000, pendingIntent);

                 }
                 Toast.makeText(maincode.this, "Checked", Toast.LENGTH_SHORT).show();
                } else {
                    rem1.setText("No reminder set");
                    Toast.makeText(maincode.this, "Not checked", Toast.LENGTH_SHORT).show();
                }
        }

        });

(rem1是提醒按钮,其文本取决于用户想要的任何名称)

代码问题是,如果我启动闹钟,我无法阻止它。我知道MyService.java中有player.stop()命令,但我怎么能从maincode.java的末尾调用它来取消选中复选框?

1 个答案:

答案 0 :(得分:3)

不,你不能直接从听众那里做到这一点。您可以通过以下方式禁用警报:

Intent intent = new Intent(maincode.this, AlarmReceiver.class);
PendingIntent pendingIntent =  PendingIntent.getBroadcast(bInsulinReminder.this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
pendingItem.cancel();
alarmManager.cancel(pendingItem);

或者如果(我想)AlarmReceiver是BroadcastReceiver的实现,并且从onReceive方法开始你的MyService,这是Service类的实现。

因此,如果要从maincode.java侦听器内部停止此警报,可以通过重新创建在AlarmReceiver中使用的PendingIntent并执行stopService方法来停止MyService。

希望有所帮助。