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.

 

Android : Open URL on button click.

In this tutorial we will learn how to open URL on button click.

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

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: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:id="@+id/textView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="@string/hello_world" />

    <Button

        android:id="@+id/button1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_below="@+id/textView1"

        android:layout_marginTop="35dp"

        android:text="Open URL " />

</RelativeLayout>

 Your activity_main.xml will look like below

5 . Open your Mainactivity.java file.

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

package arshad.urlbutton;

import android.net.Uri;

import android.os.Bundle;

import android.app.Activity;

import android.content.Intent;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

public class MainActivity extends Activity {

 Button button1;

       @Override

       protected void onCreate(Bundle savedInstanceState) {

              super.onCreate(savedInstanceState);

              setContentView(R.layout.activity_main);

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

             

              button1.setOnClickListener(new OnClickListener() {

                     @Override

                     public void onClick(View arg0) {

                           Intent intent =new Intent(Intent.ACTION_VIEW,Uri.parse("http://technologyarshadshaikh.blogspot.in"));

                           startActivity(intent); 

                          

                     }

       });

       }

       @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;

       }

}

 7. Now Build And Run Your Application.

You will be redirected to the url on button click
All The Best.