Gallery View without pictures

This is an example of Galery view on Android without any pictures. Gallery View is one of Android’s widgets. It provides a list of scrollables elements, much like the normal ListView or even a HorizontalScrollView.

In order to use Gallery View with custom elements follow these steps:

• Create a Layout xml file with describing the layout of the Gallery elements
• Add a Gallery compoenent of the layout of your main activity (main.xml)
• Create a new class that extends the BaseAdapter
• Inside the new class, override the getView to load up the custom elements for the Gallery view

public class GalleryExampleActivity extends Activity {

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		// Find our gallery view and set the adapter for it
		Gallery gallery = (Gallery) findViewById(R.id.gallery);
		gallery.setAdapter(new newGalleryAdapter(this));
	}

	// The new custom Gallery Adapter for our new layout

	private class newGalleryAdapter extends BaseAdapter {
		private Context context; // needed to create the view

		public newGalleryAdapter(Context c) {
			Context = c;
		}

		// set to three for this example
		// for normal use this should be set to the length of the data
		// structure that contains the items to be displayed
		public int getCount() {
			return 3;

		}

		public Object getItem(int position) {
			return position;
		}

		public long getItemId(int position) {
			return position;
		}

		public View getView(int position, View convertView, ViewGroup parent) {
			View v;

			// just a simple optimiztaion -
			// we only inflate a new layout if we don't have one to reuse

			if (convertView == null)
				v = LayoutInflater.from(context).inflate(R.layout.gallery_item,
					parent, false);
			else
				v = convertView;

			// Now that we have our new custom View, find out widgets in the
			// view and set them
			TextView tv = (TextView) v.findViewById(R.id.textView);

			tv.setText(String.valueOf(position));
			CheckBox cb = (CheckBox) v.findViewById(R.id.checkBox);

			// this just alternates what the checkbox states are
			if (position % 2 == 0)
				cb.setChecked(true);
			else
				cb.setChecked(false);
			return v;

		}

	}

}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/gallery_item">
	<TextView android:id="@+id/textView" android:layout_width="wrap_content" android:text="TextView" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_centerHorizontal="true" android:layout_marginTop="14dp"></TextView>
	<ImageView android:layout_width="wrap_content" android:id="@+id/imageView" android:src="@drawable/icon" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_alignParentRight="true" android:layout_marginRight="22dp"></ImageView>
	<CheckBox android:id="@+id/checkBox" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_alignParentLeft="true" android:layout_marginLeft="24dp"></CheckBox>  
</RelativeLayout>

 
This was an example of how to use Gallery View in Android without pictures.

Related Article:

• Android: Gallery View without Pictures

Reference: Android Tutorial: Gallery View without Pictures from our JCG partner Isaac Taylor at the Programming Mobile blog.