Android Application to understand Menu Options and Changing Color accordingly

Question -7

Understand Menu option.
a. Create an application that will change color of the screen, based on selected options from the
menu.

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Step 1: Create New Project in eclipse.


Step 2: Edit MainActivity XML file in folder res/layout folder of your project

<TableLayout 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" >
 
    <RelativeLayout
        android:id="@+id/mainlayout"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >

        <TextView
            android:id="@+id/tv1"
            android:gravity="center"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="Menu Color Change"
            android:textSize="40dp" />

    </RelativeLayout>

</TableLayout>

Step 3: Edit MenuActivity XML file in folder res/menu folder of  your project

<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:id="@+id/itemBlue"
        android:title="Blue Background."
        />
    <item
        android:id="@+id/itemGreen"
        android:title="Green Background."
        />
</menu>

Step 4: Edit MainActivity Java file in folder src/package/ folder of your project

package com.example.MenuOption;

import android.os.Bundle;
import android.app.Activity;
import android.graphics.Color;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.RelativeLayout;
import android.support.v4.app.NavUtils;

public class MenuOption extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_menu_option);
   
     
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu)
    {
        getMenuInflater().inflate(R.menu.menuoption, menu);
        super.onCreateOptionsMenu(menu);
        return true;
    }

@Override
public boolean onOptionsItemSelected(MenuItem item)
{
// TODO Auto-generated method stub
super.onOptionsItemSelected(item);
RelativeLayout rl = (RelativeLayout)findViewById(R.id.mainlayout);

switch(item.getItemId())
{

case R.id.itemBlue:
rl.setBackgroundColor(Color.BLUE);
break;

case R.id.itemGreen:
rl.setBackgroundColor(Color.GREEN);
break;

}
return false;
}
 

 
}

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