how changed pressed button color in android

Well, that’s quit simple,just drop these images in a drawable folder of your project and set it as a background of a button. I’ve put all these images in the drawable-hdpi folder. Created a button style in strings.xml like:

<style name="ButtonText">

        <item name="android:layout_width">wrap_content</item>

        <item name="android:layout_height">wrap_content</item>

        <item name="android:textColor">#ffffff</item>

        <item name="android:gravity">center</item>

        <item name="android:layout_margin">3dp</item>

        <item name="android:textSize">30dp</item>

        <item name="android:shadowColor">#000000</item>

        <item name="android:shadowDx">1</item>

        <item name="android:shadowDy">1</item>

        <item name="android:shadowRadius">2</item>

        <item name="android:paddingLeft">15dp</item>

        <item name="android:paddingRight">15dp</item>

    </style>

Thenn, just create a layout with some buttons:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent" android:layout_height="fill_parent"
    android:orientation="vertical">
    <Button android:text="Button" android:id="@+id/button1" style="@style/ButtonText" android:background="@drawable/btn_army_glossy"></Button>
    <Button android:text="Button" android:id="@+id/button2" style="@style/ButtonText" android:background="@drawable/btn_blue_glossy"></Button>
    <Button android:text="Button" android:id="@+id/button3" style="@style/ButtonText" android:background="@drawable/btn_blue_pink_glossy"></Button>
    <Button android:text="Button" android:id="@+id/button4" style="@style/ButtonText" android:background="@drawable/btn_green_glossy"></Button>
    <Button android:text="Button" android:id="@+id/button5" style="@style/ButtonText" android:background="@drawable/btn_lightblue_glossy"></Button>
    <Button android:text="Button" android:id="@+id/button6" style="@style/ButtonText" android:background="@drawable/btn_pink_glossy"></Button>
</LinearLayout>


Ofcourse it is possible to setup a more rubust environment where a button will have multiple states. Therefore we need a selector file which is just a simple xml file stored in the drawablefolder. Just call it btn_blue_states.xml or something like that. This file will contain state definitions of the buttons:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_focused="true" android:state_pressed="false" android:drawable="@drawable/button_selected" />
    <item android:state_focused="true" android:state_pressed="true" android:drawable="@drawable/btn_blue_glossy" />
    <item android:state_focused="false" android:state_pressed="true" android:drawable="@drawable/btn_blue_pink_glossy" />
    <item android:drawable="@drawable/btn_blue_glossy" />
</selector>