Android

Android Gallery surfaceviews spinner Example with source code
Author : Ishtek

Setup Eclipse with Android ADT Plugin for test/code environment (by using Android API Level 7 and Emulator).
P.S- Above page is having around 14 images, download size could be around 700KB.

This Page and/or example code is using Android API Level 7 and tested using corresponding Emulator only.
For latest information please refer Android Official website.

Using Android API Level : 7
Android's Gallery element used in this Example to show multiple
surface views in a slider/spinner mode.

There is no reason other than just some random picking up of view
elements from the Android APIs, to line up these elements so as to
slide/spin these views of different colors across left to right
and right to left by using touch from within a Gallery from Android's
API. As this example is tested using Android Emulator, so this spinner
is going to be tested only with the mouse click and move actions.

In this example I shall be creating one Gallery instance, four SurfaceView
instances, and a Customized ArrayAdapter instance with the overridden
getView method.

Four SurfaceViews will have different colors of background.
The customized ArrayAdapter is to return one of these surface view
objects based on the position argument to the getView method.

My custom adapter is as follows:
MyCustomImageAdapter.java

final class MyCustomImageAdapter extends ArrayAdapter {

	public MyCustomImageAdapter(Context context, 
			int textViewResourceId, List objects) {
		super(context, textViewResourceId, objects);
	}
	public View getView(int position, View convertView,
			                          ViewGroup parent) {
        return (View) getItem(position);
	}
}
The main Activity for this example is the one declared while
creating an Android project using Eclipse with DDMS and Android
plugin. I named it as DrawOnScreen, and the example code is as follows:
DrawOnScreen.java (Not showing the package name used in this example)

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.os.Bundle;
import android.view.SurfaceView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Gallery;

public class DrawOnScreen extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Gallery gallery = new Gallery(getApplicationContext());
        
        SurfaceView svPink = new SurfaceView(gallery.getContext());
        svPink.setBackgroundColor(Color.rgb(200, 100, 150));    
        
        
        SurfaceView svGreen = new SurfaceView(getApplicationContext());
        svGreen.setBackgroundColor(Color.GREEN);
        
        SurfaceView svDBlue = new SurfaceView(getApplicationContext());
        svDBlue.setBackgroundColor(Color.BLUE);
        
        SurfaceView svLBlue = new SurfaceView(getApplicationContext());
        svLBlue.setBackgroundColor(Color.GRAY);

        SurfaceView svBrown = new SurfaceView(getApplicationContext());
        svBrown.setBackgroundColor(Color.rgb(100, 100, 250));
   
        List lst = new ArrayList();
        lst.add(svPink);
        lst.add(svGreen);
        lst.add(svDBlue);
        lst.add(svLBlue);
        lst.add(svBrown);
        
        MyCustomImageAdapter arrayAdapter = 
        	        new MyCustomImageAdapter(getApplicationContext(),
        		                             R.layout.gallery,lst);
        gallery.setAdapter(arrayAdapter);
        
        setContentView(gallery);
    }
}
So gallery instance is used to set the content view for this activity.
And the adapter is the instance of my customized ArrayAdapter.

This works (as far as I know or tested using Emulator only).

Please let me know if you are having any trouble working with this
example code in some version or device that I havn't used/tested.
You can use following comment section for posting your queries
as well.
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