在Android应用程序中设置通知/警报

Question

我正在为java教程构建一个简单的Android应用程序,其中我想保留一个稍后阅读选项,用户可以使用该选项安排时间进行阅读,并且在指定时间我的应用程序应该向用户发出通知.即使我的应用程序当时没有打开,他也应该在通知栏中收到通知.我是android的新手,不知道怎么做.有人可以帮帮我吗？作为ai是新手的详细解释可能会更有帮助.谢谢提前:-)

Answer 1

要安排延迟通知,您

1)创建一个BroadcastReceiver将接收事件:

public class MyReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        //you might want to check what's inside the Intent
        if(intent.getStringExtra("myAction") != null &&
                intent.getStringExtra("myAction").equals("notify")){
            NotificationManager manager =
                    (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);

            NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
                    .setSmallIcon(R.drawable.yourIcon)
                    //example for large icon
                    .setLargeIcon(BitmapFactory.decodeResource(context.getResources(), R.mipmap.ic_launcher))
                    .setContentTitle("my title")
                    .setContentText("my message")
                    .setOngoing(false)
                    .setPriority(NotificationCompat.PRIORITY_DEFAULT)
                    .setAutoCancel(true);
            Intent i = new Intent(context, YourTargetActivity.class);
            PendingIntent pendingIntent =
                    PendingIntent.getActivity(
                            context,
                            0,
                            i,
                            PendingIntent.FLAG_ONE_SHOT
                    );
            // example for blinking LED
            builder.setLights(0xFFb71c1c, 1000, 2000);
            builder.setSound(yourSoundUri);
            builder.setContentIntent(pendingIntent);
            manager.notify(12345, builder.build());
        }

    }
}

不要忘记在Manifest中声明它:

       <receiver
        android:name="your.package.name.MyReceiver"
        android:exported="false" />

2)安排行动(假设你从一个行动Activity):

   //will fire in 60 seconds
    long when = System.currentTimeMillis() + 60000L;

    AlarmManager am = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
    Intent intent = new Intent(this, MyReceiver.class);
    intent.putExtra("myAction", "mDoNotify");
    PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
    am.set(AlarmManager.RTC_WAKEUP, when, pendingIntent);

3)你完成了

//免责声明:没有编译代码,错别字可能.剩下的就是你的作业;)