1)Open eclipse or android studio and select new android project
2)Give project name and select next
3) Choose the android version.Choose the lowest android version(Android 2.2) and select next
4) Enter the package name.package name must be two word seprated by comma and click finish
5)Go to package explorer in the left hand side.select our project.
6)Go to res folder and select layout.Double click the main.xml file.Add the code below
9) Android output is present in the android emulator as shown in below.
2)Give project name and select next
3) Choose the android version.Choose the lowest android version(Android 2.2) and select next
4) Enter the package name.package name must be two word seprated by comma and click finish
5)Go to package explorer in the left hand side.select our project.
6)Go to res folder and select layout.Double click the main.xml file.Add the code below
<?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"
android:id="@+id/info" >
<Button
android:id="@+id/button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="fetchData"
android:text="Start MULTITHREAD" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Main thread" />
</LinearLayout>
7) Now select mainactivity.java file and type the following code.<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:id="@+id/info" >
<Button
android:id="@+id/button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="fetchData"
android:text="Start MULTITHREAD" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Main thread" />
</LinearLayout>
Ypackage multi.threading;
//import your.first.R;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.TextView;
public class MultiThreadingActivity extends Activity {
private TextView tvOutput;
private static final int t1 = 1;
private static final int t2 = 2;
private static final int t3 = 3;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tvOutput = (TextView) findViewById(R.id.textView1);
}
public void fetchData(View v) {
tvOutput.setText("Main thread");
thread1.start();
thread2.start();
thread3.start();
}
Thread thread1 = new Thread(new Runnable() {
@Override
public void run() {
for (int i = 0; i < 5; i++) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
handler.sendEmptyMessage(t1);
}
}
});
Thread thread2 = new Thread(new Runnable() {
@Override
public void run() {
for (int i = 0; i < 5; i++) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
handler.sendEmptyMessage(t2);
}
}
});
Thread thread3 = new Thread(new Runnable() {
@Override
public void run() {
for (int i = 0; i < 5; i++) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
handler.sendEmptyMessage(t3);
}
}
});
Handler handler = new Handler() {
public void handleMessage(android.os.Message msg) {
if(msg.what == t1) {
tvOutput.append("\nIn thread 1");
}
if(msg.what == t2) {
tvOutput.append("\nIn thread 2");
}
if(msg.what == t3) {
tvOutput.append("\nIn thread 3");
}
}
};
}
8)Now go to main.xml and right click .select run as option and select run configuration//import your.first.R;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.TextView;
public class MultiThreadingActivity extends Activity {
private TextView tvOutput;
private static final int t1 = 1;
private static final int t2 = 2;
private static final int t3 = 3;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tvOutput = (TextView) findViewById(R.id.textView1);
}
public void fetchData(View v) {
tvOutput.setText("Main thread");
thread1.start();
thread2.start();
thread3.start();
}
Thread thread1 = new Thread(new Runnable() {
@Override
public void run() {
for (int i = 0; i < 5; i++) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
handler.sendEmptyMessage(t1);
}
}
});
Thread thread2 = new Thread(new Runnable() {
@Override
public void run() {
for (int i = 0; i < 5; i++) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
handler.sendEmptyMessage(t2);
}
}
});
Thread thread3 = new Thread(new Runnable() {
@Override
public void run() {
for (int i = 0; i < 5; i++) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
handler.sendEmptyMessage(t3);
}
}
});
Handler handler = new Handler() {
public void handleMessage(android.os.Message msg) {
if(msg.what == t1) {
tvOutput.append("\nIn thread 1");
}
if(msg.what == t2) {
tvOutput.append("\nIn thread 2");
}
if(msg.what == t3) {
tvOutput.append("\nIn thread 3");
}
}
};
}
9) Android output is present in the android emulator as shown in below.
