Adapter

GalleryFragmentStatePagerAdapter.java

public class GalleryFragmentStatePagerAdapter extends FragmentStatePagerAdapter {

    private final String TAG = "GalleryFragmentStatePagerAdapter";

    private Context context;
    private Cursor cursor;
    private LayoutInflater inflater;
    private int count;

    protected RenderScript renderScript;

    public GalleryFragmentStatePagerAdapter(Context context, Cursor cursor, FragmentManager fragmentManager) {
        super(fragmentManager);
        this.cursor = cursor;
        Log.d(TAG, "cursor count : " + cursor.getCount());
        this.context = context;
        inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        renderScript = RenderScript.create(context);
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        container.removeView((View) object);
    }

    @Override
    public int getCount() {
        return cursor.getCount();
    }


    @Override
    public Fragment getItem(int position) {

        Log.d(TAG, "get Item from position : " + position);
        return Viewer.init(getFileFromPosition(position));
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view.equals(object);
    }

    @Override
    public void restoreState(Parcelable state, ClassLoader loader) {
    }

    @Override
    public Parcelable saveState() {
        return null;
    }

    public String getFileFromPosition(int position){

        cursor.moveToPosition(position);
        int column_index = cursor.getColumnIndex(MediaStore.MediaColumns.DATA);
        String path = cursor.getString(column_index);

        return path;
    }

    public void changeCursor(Cursor cursor){
        this.cursor = cursor;
    }

}