Handler Thread Activity

1.) Create a new project by File-> New -> Android Project name it HandlerThreadActivity.

2.) Write following into main.xml:

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<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:orientation="vertical"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     >   <Button     android:id="@+id/Button01"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="@string/start_thread"></Button> </LinearLayout>

3.) Run for output.

Steps:

1.) Create a project named HandlerThreadActivity and set the information as stated in the image.

Build Target: Android 4.2
Application Name: HandlerThreadActivity
Package Name: com. HandlerThreadActivity
Activity Name: HandlerThreadActivity
Min SDK Version: 4.2

2.) Open HandlerThreadActivity.java file and write following code there:

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package com.handlerthreadactivity;   import android.app.Activity; import android.app.ProgressDialog; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button;     public class HandlerThreadActivity extends Activity{          private Button start;     private ProgressDialog progressDialog;           public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.main);         start = (Button) findViewById(R.id.Button01);         start.setOnClickListener(new OnClickListener() {               @Override             public void onClick(View arg0) {                 // TODO Auto-generated method stub                 fetchData();             }                       });     }       protected void fetchData() {         // TODO Auto-generated method stub         progressDialog = ProgressDialog.show(this, "", "Loading...");         new Thread() {             public void run() {                 try {                       Thread.sleep(800);                       } catch (InterruptedException e) {                       }                     messageHandler.sendEmptyMessage(0);               }         }.start();     }           private Handler messageHandler = new Handler() {                   public void handleMessage(Message msg) {             super.handleMessage(msg);             progressDialog.dismiss();         }     }; }

4.) Compile and build the project.

Output