Question

I am new to android. I have a requirement now. I need to add around 10 images in the res/drawable folder and on running the app i should display this images on a listView.and on selecting any of the image i should display this image in the new activity should be able to zoom in and zoom out. Please help me out to figure out this with the sample code.

Thanks in advance.

Answer 1

this example for create Gallery, select one and set to selectedImageView.
so after that you can do everything with selectedImageView.

  public class MyActivity extends Activity{

    private int selectedImagePosition = 0;
    private ImageView selectedImageView;
    private List<Drawable> drawables;
    private Gallery gallery;    


    @Override
    public void onCreate(Bundle savedInstanceState) {
      selectedImageView = (ImageView) view.findViewById(R.id.selected_imageview);
      getDrawablesList();

      gallery = (Gallery) view.findViewById(R.id.Gallery);
      gallery.setAdapter(new ImageAdapter(getActivity().getApplicationContext()));

      gallery.setOnItemClickListener(new OnItemClickListener() {
    public void onItemClick(AdapterView<?> parent, View v, final int position, long id) {

        setSelectedImage(selectedImagePosition);

    }
    });



     private void getDrawablesList() {
            drawables = new ArrayList<Drawable>();
            drawables.add(getResources().getDrawable(R.drawable.res1));
            drawables.add(getResources().getDrawable(R.drawable.res2));
            drawables.add(getResources().getDrawable(R.drawable.res3));
            drawables.add(getResources().getDrawable(R.drawable.res4));
        }

    private void setSelectedImage(int selectedImagePosition) {

            BitmapDrawable bd = (BitmapDrawable) drawables.get(selectedImagePosition);
            Bitmap b = Bitmap.createScaledBitmap(bd.getBitmap(), (int) (bd.getIntrinsicHeight() * 0.9), (int) (bd.getIntrinsicWidth() * 0.7), false);
            selectedImageView.setImageBitmap(b);
            selectedImageView.setScaleType(ScaleType.FIT_XY);

        }