Android Recipes: A Problem-Solution Approach by Dave Smith Jeff Friesen

Author:Dave Smith, Jeff Friesen
Language: eng
Format: epub, pdf
Publisher: Apress®
Published: 2012-12-12T16:00:00+00:00

Photo Overlay

We can now add on to the previous example any controls or views that are appropriate to display on top of the camera preview. Let’s modify the preview to include a Cancel button and a Snap Photo button. See Listings 4-18 and 4-19.

Listing 4-18. res/layout/main.xml

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="fill_parent"

android:layout_height="fill_parent">

<SurfaceView

android:id="@+id/preview"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

/>

<RelativeLayout

android:layout_width="fill_parent"

android:layout_height="100dip"

android:layout_alignParentBottom="true"

android:gravity="center_vertical"

android:background="#A000">

<Button

android:layout_width="100dip"

android:layout_height="wrap_content"

android:text="Cancel"

android:onClick="onCancelClick"

/>

<Button

android:layout_width="100dip"

android:layout_height="wrap_content"

android:layout_alignParentRight="true"

android:text="Snap Photo"

android:onClick="onSnapClick"

/>

</RelativeLayout>

</RelativeLayout>

Listing 4-19. Activity with Photo Controls Added

public class PreviewActivity extends Activity implements

SurfaceHolder.Callback, Camera.ShutterCallback, Camera.PictureCallback {

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