触发时间相距较长的警报不执行

如何解决触发时间相距较长的警报不执行

我的目标是让程序设置警报，一旦触发每个警报，就会播放特定的音频。

问题在于，如果 set_alarm 产生的触发时间差异很小，例如第一个和最后一个触发器相隔不到 10 分钟，这会起作用。

但是如果触发时间距离大于这个值，一段时间后触发器将不会被激活，即没有声音播放。

我需要改变什么？

我尝试了什么：

清单

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="myPackage">
    <uses-permission android:name="android.permission.FOREGROUND_SERVICE"/>
    <uses-permission android:name="android.permission.SET_ALARM"/>
    <uses-permission android:name="android.permission.WAKE_LOCK"/>
    <application
        ...
        android:supportsRtl="true">
        <service android:name=".BService" android:stopWithTask="false" />
        <activity
            android:name=".MainActivity">
        </activity>
        <receiver android:name=".Audplayer" android:exported="true" >
            <intent-filter>
                <action android:name="my.tag"></action>
                <category android:name="android.intent.category.DEFAULT"></category>
            </intent-filter>
        </receiver>
    </application>

</manifest>

主活动

package myPackage;

import ...


public class MainActivity extends AppCompatActivity {

    Audplayer ap;

    Intent i_neu;
    boolean running = false;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {

        intent = new Intent(this,Audplayer.class);
        ap = new Audplayer();
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        IntentFilter intentFilter = new IntentFilter("my.tag");
        intentFilter.addCategory(Intent.CATEGORY_DEFAULT);
        registerReceiver(ap,intentFilter);
        

        final ImageButton btnGO = (ImageButton) findViewById(R.id.btnGO);
        btnGO.setonClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (!running) {
                    running = true;
                    view.setsystemUIVisibility(View.SYstem_UI_FLAG_IMMERSIVE);
                    i_neu = new Intent(getApplicationContext(),BService.class);
                    Bundle ints = new Bundle();
                    ints.putInt(...);
                    i_neu.putExtras(ints);
                    startService(i_neu);
                } else {
                    stopService(i_neu);
                    running = false;
                }
            }
        });
    }
}

服务

package package;


import ...

public class BService extends Service {

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

    @RequiresApi(api = Build.VERSION_CODES.O)
    private void notificationDialog() {
        notificationmanager notificationmanager = (notificationmanager) getSystemService(Context.NOTIFICATION_SERVICE);
        ...
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this,NOTIFICATION_CHANNEL_ID);
        notificationBuilder.setAutoCancel(true)
                ...
                .setWhen(System.currentTimeMillis())
                ...
        Notification not = notificationBuilder.build();
        notificationmanager.notify(1,not);
        startForeground(1,not);
    }

    Audplayer ap;
    @Override
    public int onStartCommand(Intent intent,int flags,int startId) {
        final int whatever = intent.getIntExtra("whatever",0);
        ...
        ap = new Audplayer();
        ap.init(this);
        Calendar time = Calendar.getInstance();
        time.setTimeInMillis(SystemClock.elapsedRealtime());
        ap.set_alarm(this,time.getTimeInMillis(),R.raw.beginn);
        time.setTimeInMillis(SystemClock.elapsedRealtime()+whatever);
        ....
        ap.set_alarm(this,R.raw.beginn);
        time.setTimeInMillis(SystemClock.elapsedRealtime()+whatever2);
        ap.set_alarm(this,R.raw.beginn);
        return START_STICKY;
    }
}

音频播放器

package myPackage;

import ...

public class Audplayer 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,"T");
        wl.acquire();
        final int ResID = intent.getIntExtra("ResID",0);
        final long When = intent.getLongExtra("When",0);
        MediaPlayer mediaPlayer = MediaPlayer.create(context,ResID);
        AudioManager mAudioManager = (AudioManager) context.getSystemService(Context.AUdio_SERVICE);
        mediaPlayer.start();
        while (mediaPlayer.isPlaying()) {
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                e.printstacktrace();
            }
        }

        wl.release();
    }
    
    AlarmManager alarmMgr;
    Intent intent;
    Bundle Resids;

    public void init(Context context)
    {
        alarmMgr = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
        intent = new Intent(context,Audplayer.class);
        Resids = new Bundle();
    }

    public void setAlarm(Context context,long When,int ResID)
    {
        Resids.putInt("ResID",ResID);
        Resids.putLong("When",When);
        intent.putExtras(Resids);
        PendingIntent pendingIntent = PendingIntent.getbroadcast(context,(int)When,intent,PendingIntent.FLAG_ONE_SHOT);
        alarmMgr.setExact(AlarmManager.ELAPSED_REALTIME_WAKEUP,When,pendingIntent);
    }
}