Standard Android Button with a different color

Add this file into drawable folder in res folder 

red_button.xml

<?xml version="1.0" encoding="utf-8"?>
<selector
    xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:state_pressed="true" >
        <shape>
            <gradient
                android:startColor="#FFFFFF"
                android:endColor="#FFEEEE"
                android:angle="270" />
            <stroke
                android:width="2dp"
                android:color="#454545" />
            <corners
                android:radius="3dp" />
            <padding
                android:left="10dp"
                android:top="10dp"
                android:right="10dp"
                android:bottom="10dp" />
        </shape>
    </item>

    <item android:state_focused="true" >
        <shape>
            <gradient
                android:endColor="#FF0000"
                android:startColor="#AA0000"
                android:angle="270" />
            <stroke
                android:width="2dp"
                android:color="#FFFFFF" />
            <corners
                android:radius="3dp" />
            <padding
                android:left="10dp"
                android:top="10dp"
                android:right="10dp"
                android:bottom="10dp" />
        </shape>
    </item>

    <item>        
        <shape>
            <gradient
                android:endColor="#FF0000"
                android:startColor="#AA0000"
                android:angle="270" />
            <stroke
                android:width="2dp"
                android:color="#454545" />
            <corners
                android:radius="3dp" />
            <padding
                android:left="10dp"
                android:top="10dp"
                android:right="10dp"
                android:bottom="10dp" />
        </shape>
    </item>
</selector>

And set background to button like

<Button android:text="Click Me !" android:id="@+id/button1"
  android:background="@drawable/red_button" android:layout_margin="10dp"
  android:layout_width="fill_parent" android:layout_height="wrap_content"></Button>

That's it !!