Question

I want to know that on button click how the background color changed here and it takes place more than the button size..Can anybody tell e that from where the background color is coming to this??
inside the android api 4.1, at path: Android API-res-layout-log_text_box_1.xml file looks like this.

     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
     You may obtain a copy of the License at

          http://www.apache.org/licenses/LICENSE-2.0

     Unless required by applicable law or agreed to in writing, software
     distributed under the License is distributed on an "AS IS" BASIS,
     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     See the License for the specific language governing permissions and
     limitations under the License.
-->

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <Button
        android:id="@+id/add"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/log_text_box_1_add_text"/>

    <com.example.android.apis.text.LogTextBox
        android:id="@+id/text"
        android:background="@drawable/box"
        android:layout_width="match_parent"
        android:layout_height="0dip"
        android:layout_weight="1"
        android:scrollbars="vertical"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/log_text_box_1_do_nothing_text"/>

</LinearLayout>

Answer 1

This behaviour is the default android style button for the Holo theme, the selector use for such buttons are located in Path to your sdk \platforms\android-16\data\res\drawable with names such as : btn_default_holo_dark.xml and btn_default_holo_light.xml

the drawable used for the first selector are :

btn_default_normal_holo_dark.9

btn_default_disabled_holo_dark.9

btn_default_disabled_focused_holo_dark.9

btn_default_focused_holo_dark.9

btn_default_pressed_holo_dark.9

The last 9-patch image is the one responsible for the effect of exceeding the button’s borders, hope that’s what you are looking for.