How to launch activities from one activity in Android

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Mobile

Android

Hi there

I am new in Android development and I have been trying to launch activities from another. Let say from "Main Activity" I launch the "Home Activity" by clicking a button. Then from "Home Activity", I want to be able to launch 5 different activities based on whichever button is clicked. I have tried many resource online and none seems to work for me.
From Main to Home it is working fine but from Home to the other activities, nothing is happening.

Please assist.
PS. Below is my sample code:

MainActivity.java

package com.example.unisalabapp;

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

public class MainActivity extends Activity implements OnClickListener {

Button btnLogin;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

btnLogin = (Button) findViewById(R.id.btnLogin);
btnLogin.setOnClickListener(this);
}

@Override
public void onClick(View v) {

Intent l = new Intent(getApplicationContext(), Home.class);
startActivity(l);
}

}

HomeLauncher.java

package com.example.unisalabapp;

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

public class HomeLauncher extends Activity implements OnClickListener {

Button btnBooking;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.home);

//setup button listener
btnBooking = (Button) findViewById(R.id.btnBooking) ;
btnBooking.setOnClickListener(this);
}
@Override
public void onClick(View v) {

Intent b = new Intent(getApplicationContext(), ComputerBooking.class);
startActivity(b);
}
}

one of the five other activities:

package com.example.unisalabapp;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class ComputerBooking extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.computer_booking);

//setup button listener
Button startButton = (Button) findViewById(R.id.btnBack);
startButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
finish();
}
});
}

}

The Manifest:


<manifest xmlns:android="http://schemas.android.com/apk/res/android">
package="com.example.unisalabapp"
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.unisalabapp.MainActivity"
android:launchMode="singleTop"
android:stateNotNeeded="true"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN">
<category android:name="android.intent.category.LAUNCHER">


<activity>
android:name="com.example.unisalabapp.HomeLauncher"
android:launchMode="singleTop"
android:stateNotNeeded="true"
android:label="@string/app_name">
<intent-filter>
<action android:name="com.example.unisalabapp.HOME">
<action android:name="android.intent.category.DEFAULT">
<category android:name="android.intent.category.LAUNCHER">



<activity>
android:name="com.example.unisalabapp.computer_booking"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.COMPUTER_BOOKING">
<!-- <action android:name="com.example.unisalabapp.COMPUTER_BOOKING"> -->
<action android:name="android.intent.category.DEFAULT">