Android Lab Test : The views, the Gallery (english) Video of tutorial on : https://www.youtube.com/playlist?list=PLL2Z3bzdO25yHwIV3XdMzKs61At0Ldh6L Visit http://www.AndroidLabTest.com

1. Develop on Android
Android Lab Test
www.AndroidLabTest.com
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By Bruno Delb
www.weibo.com/brunodelb
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Lesson : The UI, the gallery (Gallery)

2. The UI, the gallery (Gallery)
• In this lesson, you will learn to create a gallery (Gallery)
of strings.
• For this, you will use the object Gallery and
ArrayAdapter.

3. The UI, the gallery (Gallery)
• Add a Gallery to the layout.
Gallery gallery = (Gallery)findViewById (R.id.gallery);
• To add strings to the Gallery, create an ArrayAdapter :
ArrayAdapter<String> adapter = new ArrayAdapter<String>(
Main.this, // content
android.R.layout.simple_spinner_item, // layout provided by Android
new String[]{"One", "Two", "Three", ...} // items to add
);

4. The UI, the gallery (Gallery)
• To change the background color of the Gallery, use the method
setBackgroundColor().
gallery.setBackgroundColor(0xFF0000FF);
• To associate the ArrayAdapter to the Gallery, use the method setAdapter().
gallery.setAdapter(adapter);

5. Layout main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<Gallery
android:id="@+id/gallery"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>

6. File Main.java
public class Main extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView (R.layout.main);
Gallery gallery = (Gallery)findViewById (R.id.gallery);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(
Main.this,
android.R.layout.simple_spinner_item,
new String[]{"One", "Two",
"Three","Four","Five","Six","Seven","Eight","Nine","Ten"}
);
gallery.setBackgroundColor(0xFF0000FF);
gallery.setAdapter(adapter);
}
}

7. Test on your mobile
View_Gallery

8. Follow me on my channel PengYooTV …
On my Youku channel
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Who am I ?
Bruno Delb (www.delb.cn),
Author of the first french book of development of Java mobile application (2002),
Consultant, project manager and developer of social & mobile applications,
let’s talk about your needs ...
And on Weibo :
http://www.weibo.com/brunodelb