Define color drawable in XML in Android

We can define our custom color in XML under /res/values/ folder.

example: /res/values/myresources.xml

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<resources>  <drawable name="red_color">#ff0000</drawable>  <drawable name="blue_color">#0000ff</drawable>  <drawable name="green_color">#00ff00</drawable> </resources>

After color defined, it can be acccessed as drawable in XML or using Java code.

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

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

    android:orientation="vertical"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    >

<TextView 

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:text="@string/hello"

    />

<TextView 

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:text="RED in XML"

    android:background="@drawable/red_color" />

<TextView 

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:text="GREEN in XML"

    android:background="@drawable/green_color" />

<TextView 

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:text="BLUE in XML"

    android:background="@drawable/blue_color" />

<TextView 

    android:id="@+id/javared"

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:text="RED using Java"/>

<TextView 

    android:id="@+id/javagreen"

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:text="GREEN using Java"/>

<TextView 

    android:id="@+id/javablue"

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:text="BLUE using Java"/>

</LinearLayout>










package com.AndroidTestResources;

 

import android.app.Activity;

import android.graphics.drawable.ColorDrawable;

import android.os.Bundle;

import android.widget.TextView;

 

public class AndroidTestResourcesActivity extends Activity {

  

 TextView javaRed, javaGreen, javaBlue;

  

    /** Called when the activity is first created. */

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

         

        javaRed = (TextView)findViewById(R.id.javared);

        javaGreen = (TextView)findViewById(R.id.javagreen);

        javaBlue = (TextView)findViewById(R.id.javablue);

         

        ColorDrawable red = (ColorDrawable)getResources().getDrawable(R.drawable.red_color);

        ColorDrawable green = (ColorDrawable)getResources().getDrawable(R.drawable.green_color);

        ColorDrawable blue = (ColorDrawable)getResources().getDrawable(R.drawable.blue_color);

         

        javaRed.setBackgroundDrawable(red);

        javaGreen.setBackgroundDrawable(green);

        javaBlue.setBackgroundDrawable(blue);

    }

}