Aug 27, 2014

Android example using ScheduledExecutorService

java.util.concurrent.ScheduledExecutorService is an ExecutorService that can schedule commands to run after a given delay, or to execute periodically. This example show how to create a one-shot action using ScheduledExecutorService.



package com.example.androidscheduledexecutorservice;

import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends ActionBarActivity {
 
 Button buttonStart;
 
 ScheduledExecutorService scheduledExecutorService;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        buttonStart = (Button)findViewById(R.id.start);
        buttonStart.setOnClickListener(new OnClickListener(){

   @Override
   public void onClick(View v) {
    
    Toast.makeText(MainActivity.this, 
      "Start", 
      Toast.LENGTH_LONG).show();
    
    scheduledExecutorService = Executors.newScheduledThreadPool(1);
    
    scheduledExecutorService.schedule(new Runnable(){

     @Override
     public void run() {
      MainActivity.this.runOnUiThread(new Runnable(){

       @Override
       public void run() {
        Toast.makeText(MainActivity.this, 
          "Times-up", 
          Toast.LENGTH_LONG).show();
       }});
      
     }}, 
     5, 
     TimeUnit.SECONDS);
    
   }
   
        });
    }

}


<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.androidcountdownprogressbar.MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="android-coding.blogspot.com" />

    <Button
        android:id="@+id/start"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Start" />

</LinearLayout>

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