Learning Android™ Application Programming: A Hands-On Guide to Building Android Applications

Showing a New Activity

To show a new activity, you first need to create an intent. Intents, in their simplest form, are a description of an activity that you want to occur. (You can also start activities in other applications, as covered later in the book.)

Next, you’ll create a new intent to display the Settings activity.

1. Open the activity_timer layout. To launch the new activity, add a new button to the linear layout. Give the button an ID of settings_button, and a click handler to call the method clickedSettings when the button is pressed:

Click here to view code image

<Button    android:id="@+id/settings_button"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_weight="1"     android:text ...