How to Create Multiple Activities in android Application

  How to Create Multiple Activities in android Application

This Android Program demonstrates to Create Multiple Activities within an Application using Intent and Thread.

Here is the source code of the Program to create Multiple Activities within an Application using Intent and a Thread. The project is successfully compiled and run on a Windows system using Eclipse ide. The program output is also shown below.

The Second Activity is called by the First Activity using startActivity() method which takes as input an intent object this intent object should be pointing towards the Second Activity in order to do that we create a new Intent object using intent class and within it specifying the Action name of the Second Activity which is set in the AndroidManifest.xml file.

1.MainActivity.java:

import android.os.Bundle;

import android.app.Activity;

import android.content.Intent;

import android.view.Menu;

 

public class MainActivity extends Activity {

 

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        Thread th = new Thread() {

 

            public void run() {

                try {

                    sleep(2000);

                    startActivity(new Intent(

                            "com.example.creatingmultipleactivities.second_activity"));

                } catch (InterruptedException e) {

                    // TODO Auto-generated catch block

                    e.printStackTrace();

                }

 

                finally {

                    finish();

                }

            }

        };

        th.start();

    }

 

    @Override

    protected void onPause() {

        // TODO Auto-generated method stub

        super.onPause();

 

    }

 

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.

        getMenuInflater().inflate(R.menu.main, menu);

        return true;

    }

 

}

2.second_activity.java:

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

 

public class second_activity extends Activity{

 

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        // TODO Auto-generated method stub

        super.onCreate(savedInstanceState);

        setContentView(R.layout.second);

 

    }

    @Override

    protected void onPause() {

        // TODO Auto-generated method stub

        super.onPause();

 

    }

}

3.activity_main.xml:

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

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context=".MainActivity" 

    android:background="@drawable/background">

 

    <TextView

        android:id="@+id/textView1"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:layout_alignParentLeft="true"

        android:layout_alignParentTop="true"

        android:layout_marginTop="39dp"

        android:gravity="center_horizontal"

        android:text="This is the first Activity"

        android:textAppearance="?android:attr/textAppearanceLarge"

        android:textSize="50sp" />

 

</RelativeLayout>

4.second_activity.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" 

    android:background="@drawable/background">

 

    <TextView

        android:id="@+id/textView1"

        android:layout_width="match_parent"

        android:layout_height="252dp"

        android:text="This is Second Activity"

        android:paddingTop="80dp"

        android:gravity="center"

        android:textAppearance="?android:attr/textAppearanceLarge"

        android:textSize="40sp" />

 

</LinearLayout>

5.AndroidManifest:

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

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

    package="com.example.creatingmultipleactivities"

    android:versionCode="1"

    android:versionName="1.0" >

 

    <uses-sdk

        android:minSdkVersion="8"

        android:targetSdkVersion="17" />

 

    <application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name="com.example.creatingmultipleactivities.MainActivity"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

 

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

        <activity

            android:name="com.example.creatingmultipleactivities.second_activity"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="com.example.creatingmultipleactivities.second_activity" />

 

                <category android:name="android.intent.category.DEFAULT" />

            </intent-filter>

        </activity>

    </application>

 

</manifest>