Android Application Development Cookbook: 93 Recipes for Building Winning Apps

Recipe 2.1 Using Buttons

Android Versions

Level 1 and above

Permissions

None

Source Code to Download from Wrox.com

Buttons.zip

The Button view is one of the most commonly used views on an activity. This recipe shows you the basic types of Button views and the various ways to handle their events.

Solution

Assume you have the following code snippet in the activity_main.xml file:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Button 1"
        android:onClick="onClick" />

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Button 2" 
        android:onClick="onClick" />
    <Button
        android:id="@+id/button3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Button 3" />
    <Button
        android:id="@+id/button4"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Button 4" />

    <Button
        android:id="@+id/button5"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Button 5" />

    <ToggleButton
        android:id="@+id/toggleButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="ToggleButton"
        android:onClick="onToggle" />

</LinearLayout>

The most common way to handle ...