如何在后台一小时后执行一些代码？答案

【问题标题】：How do I execute some code after one hour in background?如何在后台一小时后执行一些代码？
【发布时间】：2019-05-13 13:32:00
【问题描述】：

每当用户选择一个按钮时，我都会使用后台服务来播放音频。但我想做的是每 60 分钟播放一次音频。我该怎么做呢？

我已经尝试使用处理程序并将计时器设置为 60 分钟，然后执行播放音频的代码行，但只要用户选择按钮，它就会自动播放音频。

public class BackgroundService extends Service {

    private MediaPlayer player;
    private Boolean state = false;

    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {

        //i would like to play this audio every 60minute in the background
        player = MediaPlayer.create(BackgroundService.this, Settings.System.DEFAULT_RINGTONE_URI);

        //this will make the ringtone continuously playing
        player.setLooping(true);

        //staring the player
        player.start();

        return  START_STICKY;
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        //stopping the player when service is destroyed
        player.stop();
    }
}

【问题讨论】：

请添加更多详细信息，例如您当前如何使用该服务以了解情况。
set repeated alarm manager for every hour in android的可能重复
您是否检查过以下链接：stackoverflow.com/questions/16460612/…

标签： java android

【解决方案1】：

BroadcastReceiver 可以实现

用你的时间间隔设置AlarmManager

Intent intent = new Intent("Your Broadcast Receiver");
PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, 0, intent, 0);
AlarmManager alarmManager = (AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, time_interval, pendingIntent);

在Manifest.xml 中指定您的BroadcastReceiver

<receiver android:name="com.package.YourReceiver">
     <intent-filter>
          <action android:name="Your Broadcast Receiver" />
     </intent-filter>
</receiver>

【讨论】：

【解决方案2】：

尝试循环你的处理程序

final Handler handler = new Handler(); 


int count = 0;
final Runnable runnable = new Runnable() {
    public void run() { 

        // do the task here
        Log.d(TAG, "runn test");


        if (count++ < 5)
            //will continue to loop 5 times
            handler.postDelayed(this, 5000);

    } 
}; 
// trigger first time 
handler.post(runnable);

【讨论】：