AsyncTask 1 Example

Demo:

1)Activity:

package com.venky.asynctask;

import android.app.Activity;

import android.app.ProgressDialog;

import android.os.AsyncTask;

import android.os.Bundle;

import android.widget.Toast;

public class AsyncTaskDemoActivity extends Activity {

      /** Called when the activity is first created. */

      @Override

      public void onCreate(Bundle savedInstanceState) {

            super.onCreate(savedInstanceState);

            setContentView(R.layout.main);

            MyAsyncTask myAsyncTask = new MyAsyncTask();

            myAsyncTask.execute();

      }

      class MyAsyncTask extends AsyncTask<Void, Void, Void> {

            ProgressDialog pd;

            @Override

            protected void onPreExecute() {

                  // TODO Auto-generated method stub

                  pd = ProgressDialog.show(AsyncTaskDemoActivity.this, "Loading...",

                              "Background work is progress");

                  super.onPreExecute();

            }

            @Override

            protected Void doInBackground(Void... params) {

                  // TODO Auto-generated method stub

                  try {

                        Thread.sleep(5000);

                  } catch (InterruptedException e) {

                        // TODO Auto-generated catch block

                        e.printStackTrace();

                  }

                  return null;

            }

            @Override

            protected void onPostExecute(Void result) {

                  // TODO Auto-generated method stub

                  pd.cancel();

                  Toast.makeText(

                              getApplicationContext(),

                              "Background work is complted \n Foreground work is started",

                              Toast.LENGTH_LONG).show();

                  super.onPostExecute(result);

            }

      }

}

2)main.xml:

 

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:background="#5F04B4"

    android:orientation="vertical" >

</LinearLayout>

3)Download this Project Click Here