AsyncTask Example

AsyncTask Example in android

activity_main.xml

<RelativeLayout 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"

    tools:context=".MainActivity" >

    <Button

        android:id="@+id/button1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentTop="true"

        android:layout_centerHorizontal="true"

        android:text="Start AsyncTask" />

</RelativeLayout>

MainActivity.java

package com.swamys.asynctaskexample;

import android.app.Activity;

import android.app.ProgressDialog;

import android.os.AsyncTask;

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 Activity {

       ProgressDialog dialog;

       @Override

       protected void onCreate(Bundle savedInstanceState) {

              super.onCreate(savedInstanceState);

              setContentView(R.layout.activity_main);

              Button button = (Button) findViewById(R.id.button1);

              button.setOnClickListener(new OnClickListener() {

                     @Override

                     public void onClick(View v) {

                           // TODO Auto-generated method stub

                           MyAsynctask asynctask = new MyAsynctask();

                           asynctask.execute();

                     }

              });

       }

       class MyAsynctask extends AsyncTask<String, String, String> {

              @Override

              protected void onPreExecute() {

                     super.onPreExecute();

                     dialog = new ProgressDialog(MainActivity.this);

                     dialog.setTitle("Loading...");

                     dialog.setMessage("Loading articals...");

                     dialog.show();

                     Toast.makeText(getApplicationContext(), "onPreExecute()",

                                  Toast.LENGTH_SHORT).show();

              }

              @Override

              protected String doInBackground(String... params) {

                     return null;

              }

              @Override

              protected void onProgressUpdate(String... values) {

                     super.onProgressUpdate(values);

                     Toast.makeText(getApplicationContext(), "onProgressUpdate()",

                                  Toast.LENGTH_SHORT).show();

              }

              @Override

              protected void onPostExecute(String result) {

                     super.onPostExecute(result);

                     Toast.makeText(getApplicationContext(), "onPostExecute()",

                                  Toast.LENGTH_SHORT).show();

                     // dialog.dismiss();

              }

       }

}