Android : Change Background Color Using Menu Option.

In this tutorial we will learn how add menu option and how to change background color using menu option.

1. Create New Android Application Project. Name it as ColorUsingMenu.
 

2. Open Your activity_main.xml file.
3. Replace your activity_main.xml code with below code.

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

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

    android:id="@+id/Rl"

    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" >

    <TextView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Change background color using Menu  options.." />

</RelativeLayout>

 Your activity_main.xml will look like below..
 

4 . Open your Mainactivity.java file.

5. Replace Your Mainactivity.java code with below code.

package arshad.colorusingmenu;

import android.os.Bundle;

import android.app.Activity;

import android.graphics.Color;

import android.view.Menu;

import android.view.MenuItem;

import android.widget.RelativeLayout;;

public class MainActivity extends Activity {

       @Override

       protected void onCreate(Bundle savedInstanceState) {

              super.onCreate(savedInstanceState);

              setContentView(R.layout.activity_main);

       }

         public boolean onOptionsItemSelected(MenuItem item){

              RelativeLayout Ri=(RelativeLayout)findViewById(R.id.Rl);

              if(item.getTitle().toString().equals("RED"))

                     Ri.setBackgroundColor(Color.RED);

              if(item.getTitle().toString().equals("GREEN"))

                     Ri.setBackgroundColor(Color.GREEN);

              if(item.getTitle().toString().equals("BLUE"))

                     Ri.setBackgroundColor(Color.BLUE);

              if(item.getTitle().toString().equals("WHITE"))

                     Ri.setBackgroundColor(Color.WHITE);

              if(item.getTitle().toString().equals("YELLOW"))

                     Ri.setBackgroundColor(Color.YELLOW);

             

              return true;

           }

          

          

          

          

           public boolean onCreateOptionsMenu(Menu menu){

              menu.add("RED").setIcon(android.R.drawable.ic_menu_call);

              menu.add("GREEN");

              menu.add("BLUE");

              menu.add("WHITE");

              menu.add("YELLOW");

              return true;

           }

       }

 6. Now Build And Run Your Application.
  

7. Output screens..

Use menu options to change background colors..

Download Code From Here. 

 

All The Best.

 

Set Your Wallpaper As Your Application's Theme.

We Can Use our Existing Project For This Tutorial.
I am using my Widget Example Project.
Widget Example

We are Setting Our Wallpaper or Live Wallpaper As our Project's Theme.
Just Open Your AndroidMenifest.xml  FIle.
If you also using our previous Project then your XML will Look Like Below.

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

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

    package="arshad.widget"

    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="arshad.widget.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>

    </application>

</manifest>

you can see in your application's content
android:theme="@style/AppTheme"

just remove that line and add below line.

 android:theme="@android:style/Theme.Wallpaper"

this will set your device Wallpaper as your application's theme.
The theme will be change as device wallpaper changes.

Now Your AndroidMenifest File will Look Like Below.

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

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

    package="arshad.widget"

    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="@android:style/Theme.Wallpaper" >

        <activity

            android:name="arshad.widget.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>

    </application>

</manifest>

Now Run Your Application.
My Application is Lokking Like Below.

Set Different Wallpaper's To Your Device And Enjoy :)

All The Best.