How to apply custom image to checkbox in android

I'm trying to apply custom image to checkbox in android, for this I create an check_custom.xml file in which I define custom image for different states of check box like:

<item android:state_checked="true" 
      android:drawable="@drawable/btn_check_on" /> <!-- checked --> 
<item android:state_checked="false" 
      android:drawable="@drawable/btn_check_off" /> <!-- unchecked --> 
<item android:state_focused="true"
      android:drawable="@drawable/btn_check_onfocus" />    <!--on focus--> 
<item android:drawable="@drawable/btn_check_off" /> <!-- default --> 

Three different images on three states on checked,on focus and on unchecked, and then I assign this xml file to background attribute of check boxes,but I'm not getting required result, this technique apply the custom image as well as default image both.

Salman, set android:button instead of android:background. See also https://stackoverflow.com/questions/3965484/custom-checkbox-image-android

I didn´t like the appearance of the checkbox default image when the background layout was dark, so I changed it using a xml selector in order to have a white background in the button.

The selector is needed in android:button="@drawable/selector_check"

                 <CheckBox
                            android:id="@+id/checkBox1"
                            android:layout_width="fill_parent"
                            android:layout_height="wrap_content"
                            android:gravity="left"
                            android:text="Show password"
                            android:textColor="@color/white"
                            android:button="@drawable/selector_check"
                            >

And the following is the content of "drawable/selector_check.xml":

          <?xml version="1.0" encoding="utf-8"?>
          <selector xmlns:android="http://schemas.android.com/apk/res/android">
          <item android:state_checked="true" 
              android:drawable="@android:drawable/checkbox_on_background" /> <!-- checked --> 
          <item android:state_checked="false" 
             android:drawable="@android:drawable/checkbox_off_background" /> <!-- unchecked-->
          </selector>

And this is the result:

Copy the btn_check.xml from android-sdk/platforms/android-#/data/res/drawable to your project's drawable folder and change the 'on' and 'off' image states to your custom images.

Then your xml will just need android:button="@drawable/btn_check"

<CheckBox
    android:button="@drawable/btn_check"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:checked="true" />

If you want to use different default android icons, you can use android:button="@android:drawable/..."

http://schemas.android.com/apk/res/android">

<item android:drawable="@drawable/ON" android:state_checked="false"/>
<item android:drawable="@drawable/OFF" android:state_checked="true"/>
<item android:drawable="@drawable/ON"/>