Intent Service in Android with simple example

  Android application with complete code:

First page

The xml code:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:background="@drawable/trans" >

    <RelativeLayout
        android:layout_width="fill_parent"
        android:layout_height="162dp"
        android:gravity="center"
        android:layout_marginTop="100dp"
        android:background="@drawable/transp">
        <EditText
            android:id="@+id/Username"
            android:layout_width="400dp"
            android:layout_height="wrap_content"
            android:inputType="textPersonName"
            android:text="Username" >
            <requestFocus />
        </EditText>
        <EditText
            android:id="@+id/password"
            android:layout_width="400dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="40dp"
            android:ems="10"
            android:inputType="textPassword"
            android:text="Password" />

        <Button
            android:id="@+id/button2"
            android:layout_width="150dp"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_alignParentRight="true"
            android:background="@drawable/liginbtn"
            android:text="Exit" />
        <Button
            android:id="@+id/one"
            android:layout_width="150dp"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_alignParentLeft="true"
            android:layout_toLeftOf="@+id/button2"
            android:background="@drawable/liginbtn"
            android:text="Enter" />

    </RelativeLayout>

</LinearLayout>

second page

Here the code:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="100dp"
    android:orientation="horizontal"
    android:background="@drawable/trans">
       <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/layer13" />
    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Janmejoy"
        android:layout_marginLeft="20dp"/> 
    </LinearLayout>

Here the code begins.......

"MainActivity"

package com.example.example;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends Activity {
   
    Button Login,Exit;
    EditText username,password;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.sample);           
       
    Login=(Button)findViewById(R.id.one);
    Exit=(Button)findViewById(R.id.button2);
    username=(EditText)findViewById(R.id.Username);
    password=(EditText)findViewById(R.id.password);
   
    Login.setOnClickListener(new OnClickListener() {
       
        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
           
            Intent intent=new Intent(MainActivity.this,First.class);
            startActivity(intent);
            finish();
           
        }
    });
Exit.setOnClickListener(new OnClickListener() {
       
        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
           
            System.exit(0);
            finish();
           
        }
    });
       
    }
}

"NextActivity:

package com.example.example;

import android.app.Activity;
import android.os.Bundle;

public class First extends Activity {    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.intentpage);
    }
}

You must add the next activity in Manifest file

<activity android:name=".First" android:label="@string/app_name" > </activity>