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

Taking a Photograph

In this case, you simply request photos from the default camera app that users have set up on the device. Here’s how.

1. Open the activity_timer XML layout file. Above the existing TextView, add a new LinearLayout. In this LinearLayout, set the android:layout_width to 160dp, set the android:layout_height to wrap_content, and give it an android:layout_marginBottom of 8dp. Set both android:layout_alignParentTop and android:layout_centerHorizontal to true to align and center the button at the top of the view (see Listing 8.1).

Listing 8.1 Setting the Layout and Aligning and Centering the Button

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<LinearLayout    android:layout_width="160dp"     android:layout_height="wrap_content"     android:layout_alignParentTop ...