Android 如何设置精确重复闹钟?

Android How to set exact repeating alarm?

我正在构建一个警报应用程序,它将有一个精确的重复警报。

看到 Repeating Android 如何只提供 Inexact 警报和 ,我尝试制作 Exact 警报,触发后会自行设置一次再次。只要我的屏幕一直亮着,这种类型的闹钟就可以正常工作。但是一旦它进入睡眠状态,第一次警报就可以正常工作,但是以编程方式设置的第二次警报会延迟触发,就像我使用 Inexact 方法一样。

作为替代解决方案,我正在考虑制作一个 InexactRepeating 警报,它会每分钟触发一次以检查它是否 "the time"。这样我的警报将有 2 分钟的不精确间隔,这是可以接受的。但我不确定它会对 phone 的电池造成多大压力。

大家有什么想法吗?

这是我在 Exact 警报时的尝试:

AlarmManager.java

 public static void setAlarm(Context context){
        AlarmManager alarmManager = (AlarmManager) context.getSystemService(context.ALARM_SERVICE);

        //SET BROADCAST RECEIVER WHICH WILL BE THE ONE TO LISTEN FOR THE ALARM SIGNAL
        Intent intent = new Intent(context, AlarmTriggerBroadcastReceiver.class);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 22222, intent, PendingIntent.FLAG_CANCEL_CURRENT);

        //SETING THE ALARM
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
            alarmManager.setExact(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 300000, pendingIntent);
        } else {
            alarmManager.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 300000, pendingIntent);
        } 

    }

AlarmTriggerBroadcastReceiver.java

public class AlarmTriggerBroadcastReceiver extends BroadcastReceiver {

    private final static String TAG_ALARM_TRIGGER_BROADCAST = "ALARM_TRIGGER_BROADCAST";

    @Override
    public void onReceive(Context context, Intent intent) {
        //WAKE UP DEVICE
        WakeLocker.acquire(context);

            //LAUNCH PAGE
            Intent intent1 = new Intent();
            intent1.setClassName(context.getPackageName(), SomeActivity.class.getName());
            intent1.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            context.startActivity(intent1);


            Toast.makeText(context, "TOAST ALARM", Toast.LENGTH_LONG).show();
        };

        //SET NEW ALARM
        AlarmManagerActivity.setAlarm(context);
        WakeLocker.release();   

    }

}

WakeLocker.java

//WAKES UP DEVICE IF PHONE'S SCREEN LOCKED
public abstract class WakeLocker {
    private static PowerManager.WakeLock wakeLock;

    public static void acquire(Context ctx) {
        //if (wakeLock != null) wakeLock.release();

        PowerManager pm = (PowerManager) ctx.getSystemService(Context.POWER_SERVICE);
        wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK |
                PowerManager.ACQUIRE_CAUSES_WAKEUP |
                PowerManager.ON_AFTER_RELEASE, "myapp:WAKE_LOCK_TAG");
        wakeLock.acquire();
    }

    public static void release() {
        if (wakeLock != null) wakeLock.release(); wakeLock = null;
    }
}

Manifest

    <uses-permission android:name="android.permission.WAKE_LOCK" />
    <uses-permission android:name="com.android.alarm.permission.SET_ALARM"/>
    <uses-permission android:name="android.permission.SET_ALARM"/>

  <receiver
            android:name=".Alarm.AlarmTriggerBroadcastReceiver"
            android:process=":remote">

            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED"></action>
            </intent-filter>
            <intent-filter android:priority="1">
                <action android:name="my.app.here.ALARM_RECIEVED" />
            </intent-filter>
        </receiver>

各位码农,怎么办?

您是否尝试过使用 WorkManager 而不是必须使用广播接收器?查看详细信息 here. And an app demo here