Code reuse in android

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Mobile

Android

I have 2 layouts in named first_activity and second_activity...
the first_activity has a single button button1 on which i have applied onclick listener to make a simple toast and i have used this first_activity in the FirstActivity...
the second_activity has a single button along with that i have included the first_activity in the second_activity so the second_activity has 2 buttons...
now have coded and run the application using FirstActivity has the main activity and the i am getting the toast onclick of 1st button...
Now the SecondActivity extends FirstActivity along its own button 2 click event...
now i have changed the start activity as SecondActivity and after running i am getting the click event of only 2nd button not of 1st button..
so where i am making mistake..
my intention is to make code reuse for example i have an app in which there are 30 layout and all the layout have common menu which is included in each layout so i just want to code for that menu once and reuse that code in all the other layout...

here are the code of my app....
first_activity:
<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="200dip"
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=".FirstActivity" >

<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="1st Button" />




second_activity:
<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=".FirstActivity" >

<include layout="@layout/first_activity">
android:id="@+id/layout"/>

<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/layout"
android:text="2nd Button" />




FirstActivity:
package com.example.codereuse;

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

public class FirstActivity extends Activity {

Button b1;

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

b1 = (Button) findViewById(R.id.button1);

b1.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), "Button 1 Clicked", Toast.LENGTH_LONG).show();
}
});
}

@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;
}


}


SecondActivity:
package com.example.codereuse;

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

public class SecondActivity extends FirstActivity {

Button b2;

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

b2 = (Button) findViewById(R.id.button2);

b2.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), "Button 2 Clicked", Toast.LENGTH_LONG).show();
}
});
}

@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;
}

}


AndroidMenifest:

<manifest xmlns:android="http://schemas.android.com/apk/res/android">
package="com.example.codereuse"
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.codereuse.SecondActivity"
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.codereuse.FirstActivity"
android:label="@string/app_name" >







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