Question

How could i scale the selected image in the Gallery, i tried this, but it doesn’t work very well. `

public void  onItemSelected  (AdapterView<?>  parent, View  v, int position, long id) 
{
    Animation grow = AnimationUtils.loadAnimation(DetailTvShow.this, R.anim.grow);

            Button btn = (Button)findViewById(R.id.button1);
            btn.setText("saison "+(position+1));
            View sideView = v.findViewById(position + 1);
            View sideView1 = v.findViewById(position - 1);

           if ((sideView != null)||(sideView1 != null)){
               ((ImageView)sideView).setLayoutParams(new Gallery.LayoutParams(80, 115));

               ((ImageView)sideView1).setLayoutParams(new `enter code here`Gallery.LayoutParams(80, 115));

           }

      /*      sideView = parent.findViewById(position + 1);
          if (sideView != null)
               ((ImageView)sideView).setLayoutParams(new Gallery.LayoutParams(80, 115));  */

            v.startAnimation(grow);
            v.setLayoutParams(new Gallery.LayoutParams(105, 140));
        }`

Answer 1

I had the same issue, there was a similar solution to the one I will present here on stack overflow but it did not work correctly, though the views would scale, they would eventually stop returning to their original size.

Here the modified fix I found for myself that so far seems to work fine and does not cause any issues.

In res/anim create a grow.xml file change to scale sizes to whatever works for you

<?xml version="1.0" encoding="utf-8"?>
<scale xmlns:android="http://schemas.android.com/apk/res/android"
       android:fromXScale="1.0"
       android:toXScale="1.075"
       android:fromYScale="1.0"
       android:toYScale="1.075"
       android:duration="150"
       android:pivotX="50%"
       android:pivotY="50%"
       android:interpolator="@android:anim/accelerate_decelerate_interpolator"
       android:fillAfter="true"> 
</scale>

Copy this class and put it in your inherited gallery or right in your activity

    private class SelectListener implements AdapterView.OnItemSelectedListener {

        private Animation grow     = null;
        private View      lastView = null; 

        public SelectListener(Context c) {
             grow = AnimationUtils.loadAnimation(c, R.anim.grow);
        }

        public void  onItemSelected(AdapterView<?>  parent, View  v, int position, long id)         {

            // Shrink the view that was zoomed 
            try { if (null != lastView) lastView.clearAnimation();
            } catch (Exception clear) { }

            // Zoom the new selected view
            try { v.startAnimation(grow); } catch (Exception animate) {}

            // Set the last view so we can clear the animation 
            lastView = v;
        }

        public void onNothingSelected(AdapterView<?>  parent) {
        }

   }

Then after you have created your gallery class and attached the adapter call

yourGalleryName.setOnItemSelectedListener(new SelectListener(this));  

This worked for me, let me know if it does for you as well.