java - 每 30 秒在后台刷新 Android 应用程序以获取推送通知\

Question

我正在为我的 Android 应用开发推送通知。我正在使用以下功能来获取通知。当我点击特定按钮时它工作正常。出于测试目的，我在按钮上执行了此操作。现在，我想每 30 秒运行一次此 Activity 。

代码如下:

`public static void createNotification(Context mMain, boolean isLoggedIn)
    {
        NotificationCompat.Builder builder =
                new NotificationCompat.Builder(mMain)
                        .setSmallIcon(R.mipmap.ic_launcher)
                        .setContentTitle("Items in your Cart")
                        .setContentText("You have some pending items in your cart")
                        .setDefaults(NotificationCompat.DEFAULT_SOUND)
                        .setAutoCancel(true);
        int NOTIFICATION_ID = 12345;

        Intent targetIntent = new Intent(mMain, MainActivity.class);
        targetIntent.putExtra("isTrackOrder", false);
        if(isLoggedIn)
            targetIntent.putExtra("isLoggedIn", true);
        else
            targetIntent.putExtra("isLoggedIn", false);
        PendingIntent contentIntent = PendingIntent.getActivity(mMain, 0, targetIntent, PendingIntent.FLAG_UPDATE_CURRENT);
        builder.setContentIntent(contentIntent);
        NotificationManager nManager = (NotificationManager) mMain.getSystemService(Context.NOTIFICATION_SERVICE);
        nManager.notify(NOTIFICATION_ID, builder.build());
    }`

现在我想做的是，当我运行应用程序或应用程序在后台运行时，我想调用此函数并每 30 秒获取一次通知。我怎样才能做到这一点？我不想为特定按钮执行此 Activity 。

Answer 1

您可以使用AlarmReceiver 类来实现这一点。

点击此链接:https://www.sitepoint.com/scheduling-background-tasks-android/

引用:

<强>1。创建广播接收器:

public class AlarmReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context arg0, Intent arg1) {
        // For our recurring task, we'll just display a message
        Toast.makeText(arg0, "I'm running", Toast.LENGTH_SHORT).show();

    }
 }

1. 在 AndroidManifest 文件中声明 如下:

   <receiver android:name=".AlarmReceiver"></receiver>
   

2. 在您的java 文件 或Activity 类中:

   在onCreate()方法中，声明并初始化Intent alarmIntent:

Intent alarmIntent = new Intent(this, AlarmReceiver.class);
pendingIntent = PendingIntent.getBroadcast(this, 0, alarmIntent, 0);

1. 创建下面的 mwthod 然后调用它:

   public void startAlarm(View view) {
       manager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
       int interval = 10000;
       manager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), interval, pendingIntent);
       Toast.makeText(this, "Alarm Set", Toast.LENGTH_SHORT).show();
   }