Android Application that implements Multi threading

Aim:

To develop a Android Application that implements Multi threading.

Procedure:

Creating a New project:

Open Android Studio and then click on File -> New -> New project.

new project

Then type the Application name as “ex.no.7″ and click Next.

application-name-7

Then select the Minimum SDK as shown below and click Next.

minimum sdk

Then select the Empty Activity and click Next.

empty activity

Finally click Finish.

finish

It will take some time to build and load the project.
After completion it will look as given below.

new

Designing layout for the Android Application:

Click on app -> res -> layout -> activity_main.xml

activity_main

Now click on Text as shown below.

text

Then delete the code which is there and type the code as given below.

Code for Activity_main.xml:

<?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="match_parent" android:orientation="vertical" > <ImageView android:id="@+id/imageView" android:layout_width="250dp" android:layout_height="250dp" android:layout_margin="50dp" android:layout_gravity="center" /> <Button android:id="@+id/button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_margin="10dp" android:layout_gravity="center" android:text="Load Image 1" /> <Button android:id="@+id/button2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_margin="10dp" android:layout_gravity="center" android:text="Load image 2" /> </LinearLayout>

Now click on Design and your application will look as given below.

design-7

So now the designing part is completed.

Java Coding for the Android Application:

Click on app -> java -> com.example.exno7 -> MainActivity.

MainActivity

Then delete the code which is there and type the code as given below.

Code for MainActivity.java:

package com.example.exno7; import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
public class MainActivity extends AppCompatActivity
{ ImageView img; Button bt1,bt2; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); bt1 = (Button)findViewById(R.id.button); bt2= (Button) findViewById(R.id.button2); img = (ImageView)findViewById(R.id.imageView); bt1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { new Thread(new Runnable() { @Override public void run() { img.post(new Runnable() { @Override public void run() { img.setImageResource(R.drawable.india1); } }); } }).start(); } }); bt2.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { new Thread(new Runnable() { @Override public void run() { img.post(new Runnable() { @Override public void run() { img.setImageResource(R.drawable.india2); } }); } }).start(); } }); }
}

So now the Coding part is also completed.
Now run the application to see the output.

Note: Before Running the Application, Copy the Images given below and Paste it in “app -> res -> drawable” by pressing “right click mouse button on drawable” and selecting the “Paste” option.

TO DOWNLOAD THE IMAGES : CLICK HERE