Android program for converts temperature Celsius to Fahrenheit

an android application program that converts the temperature from Celsius to Fahrenheit. Compile and build the project.

Program:

<?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:orientation="vertical" >
    <TextView
        android:id="@+id/tv1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Week13" />
    <TextView
        android:id="@+id/tv2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Celsius to Fahrenheit"
        android:textAppearance="?android:attr/textAppearanceLarge" />
    <TextView
        android:id="@+id/tv3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Enter the  temperature"
        android:textAppearance="?android:attr/textAppearanceMedium" />
    <EditText
        android:id="@+id/et"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
        <requestFocus />
    </EditText>
    <TextView
        android:id="@+id/tv4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"

        android:text=""
        android:textAppearance="?android:attr/textAppearanceMedium" />  
    <Button
        android:id="@+id/btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="CONVERT" />
</LinearLayout>

Wk13Activity.java:

package cse.wk13;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class Wk13Activity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        TextView tv1=(TextView) findViewById(R.id.tv1);
        TextView tv2=(TextView) findViewById(R.id.tv2);
        TextView tv3=(TextView) findViewById(R.id.tv3);
        final TextView tv4=(TextView) findViewById(R.id.tv4);
final EditText et=(EditText) findViewById(R.id.et);
        Button btn=(Button) findViewById(R.id.btn);
        btn.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
// TODO Auto-generated method stub
String s1=et.getText().toString();
int cel=Integer.parseInt(s1);
float faren=(float) ((cel*1.8)+32);
String res=Float.toString(faren);
tv4.setText("Temperature in Fahrenheit is "+res);
}

});
    }
}


Output:

Program Executed By::  Jyothi