How to show image preview from GridView Activity in Android

I made a App with a GridView using this tutorial for android. I placed all the images into the drawable-hdpi folder. The gridview is working just fine but now i want to start or open another activity when the user touches an image in the gridview. The new activity should be a preview of that single image.

How can I do this?

This how i putted but its not working my 1activity :

gridView.setOnItemClickListener(new OnItemClickListener() 
{
    public void onItemClick(AdapterView<?> parent, View v, int position, long id) 
    {                
        Intent fullScreenIntent = new Intent(v.getContext(), 2activity.class);
        fullScreenIntent.putExtra(1activity.class.getName(),imageIDs);

        1activity.this.startActivity(fullScreenIntent); 
    }
}); 

my 2activity :

    public void onCreate(Bundle savedInstanceState, int[] imageIDs) {
super.onCreate(savedInstanceState);
setContentView(R.layout.image);
        Intent intent = getIntent();

        long imageIDs = (Long) intent.getExtras().get(2activity.class.getName(开发者_如何学C));
        ImageView imageView = (ImageView)v.findViewById(R.id.preview);

        imageView.setLayoutParams( new ViewGroup.LayoutParams(WindowManager.LayoutParams.FILL_PARENT, WindowManager.LayoutParams.FILL_PARENT));

        imageView.setImageResource((int) imageIDs);
        imageView.setScaleType(ImageView.ScaleType.FIT_XY);     

    }  

when i go to 2activity from 1activity its just showing nothing just blank its not catching images from 1st activity ???? what shall i do ???

Error here:

long imageIDs = (Long) intent.getExtras().get(2activity.class.getName());

wrong key, fix it by:

 long imageIDs = (Long) intent.getExtras().get(1activity.class.getName());

Create an OnItemClickListener ( http://developer.android.com/reference/android/widget/AdapterView.OnItemClickListener.html ) that launches your activity and use the setOnItemClickListener method (http://developer.android.com/reference/android/widget/AdapterView.html#setOnItemClickListener%28android.widget.AdapterView.OnItemClickListener%29) to attach the listener to your GridView.

-Kurtis

In your 2Activity you are getting null value for

long imageIDs = (Long) intent.getExtras().get(2activity.class.getName());

you should put here:

int imageIDs1 = intent.getIntExtra(2activity.class.getName(), R.drawable.icon);

On Image click Get Image Bitmap, Convert bitmap to Bytes and pass bytes via intent to your activity

                Bitmap b=image.getDrawingCache();
                ByteArrayOutputStream stream = new ByteArrayOutputStream();
                b.compress(Bitmap.CompressFormat.PNG,75, stream);
                byte[] bytes = stream.toByteArray();
                Intent i = new Intent(mContext, ShowImageActivity.class);
                i.putExtra("Bitmap", bytes);
                startActivity(i);

In 2nd Activity Get Bytes from bundle and set to imageview

Bundle bundle = getIntent().getExtras();
    if (bundle != null) {
        if(bundle.containsKey("Bitmap")) {
            byte[] bytes = bundle.getByteArray("Bitmap");
            Bitmap bmp = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
            BitmapDrawable ob = new BitmapDrawable(getResources(), bmp);
            photo.setBackground(ob);
        }

    }