Android Service Notification Dymanic

JAVA:MyService

package com.example.joe.androidservicedemo;

import android.app.Notification;
import android.app.Service;
import android.content.Intent;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.IBinder;
import android.os.Looper;
import android.os.Message;
import android.os.Process;
import android.support.v4.app.NotificationCompat;
import android.widget.RemoteViews;
import android.widget.Toast;

/**
 * Created by joe on 2017/8/30.
 */

public class MyService extends Service {

    private Looper mServiceLooper;
    private ServiceHandler mServiceHandler;
    Notification notification;
    RemoteViews remoteViews;

    // Handler that receives messages from the thread
    private class ServiceHandler extends Handler{
        public ServiceHandler(Looper looper) {
            super(looper);
        }

        @Override
        public void handleMessage(Message msg) {
            int i = 0;
            while (i < 10) {
                try {
                    remoteViews.setTextViewText(R.id.textView_value,String.valueOf(i));
                    notification = new NotificationCompat.Builder(getApplicationContext())
                            .setContentTitle("Service Notification")
                            .setSmallIcon(R.mipmap.ic_launcher)
                            .setAutoCancel(true)
                            .setContent(remoteViews)
                            .build();
                    startForeground(msg.arg1,notification);
                    Thread.sleep(1000);
                    i ++;
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            stopForeground(true);
            stopSelf(msg.arg1);
        }
    }

    @Override
    public void onCreate() {
        // Start up the thread running the service.  Note that we create a
        // separate thread because the service normally runs in the process's
        // main thread, which we don't want to block.  We also make it
        // background priority so CPU-intensive work will not disrupt our UI.
        HandlerThread thread = new HandlerThread("ServiceStartArguments",
                Process.THREAD_PRIORITY_BACKGROUND);
        thread.start();

        // Get the HandlerThread's Looper and use it for our Handler
        mServiceLooper = thread.getLooper();
        mServiceHandler = new ServiceHandler(mServiceLooper);
        remoteViews = new RemoteViews(this.getPackageName(),R.layout.remote_layout);
        remoteViews.setTextViewText(R.id.textView_value,String.valueOf(0));
        notification = new NotificationCompat.Builder(getApplicationContext())
                .setContentTitle("Service Notification")
                .setSmallIcon(R.mipmap.ic_launcher)
                .setAutoCancel(true)
                .setContent(remoteViews)
                .build();
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        Toast.makeText(this, "service starting", Toast.LENGTH_SHORT).show();

        // For each start request, send a message to start a job and deliver the
        // start ID so we know which request we're stopping when we finish the job
        Message msg = mServiceHandler.obtainMessage();
        msg.arg1 = startId;
        startForeground(msg.arg1,notification);
        mServiceHandler.sendMessage(msg);
        // If we get killed, after returning from here, restart
        return START_REDELIVER_INTENT;
    }

    @Override
    public IBinder onBind(Intent intent) {
        // We don't provide binding, so return null
        return null;
    }

    @Override
    public void onDestroy() {
        Toast.makeText(this, "service done", Toast.LENGTH_SHORT).show();
    }

}

JAVA MainActivity

package com.example.joe.androidservicedemo;

import android.app.Service;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Intent intent = new Intent(this,MyService.class);
        startService(intent);
    }
}

XML activity_main

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.joe.androidservicedemo.MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</android.support.constraint.ConstraintLayout>

XML remote_layout

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="80dp"
    android:orientation="horizontal">

    <TextView
        android:id="@+id/textView"
        android:gravity="center"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:text="Index" />

    <TextView
        android:id="@+id/textView_value"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:gravity="center" />
</LinearLayout>