Question

I want to use an Android Gallery but draw the items from right to left (the writing direction in Hebrew)
The Gallery items represent chapters in a book written in Hebrew, so that the item order is important

Android draws them in the opposite direction like this (the first item is chosen)
1 2 3 4 5

instead of this
5 4 3 2 1

I already tried overriding these methods in my Gallery class
(none of them changed the drawing order):

@Override
public int getChildDrawingOrder(int childCount, int i) {
    return getChildDrawingOrder(childCount, childCount - i+1)
}

I know from Debugging that the getChildDrawingOrder was visited
I tried a couple of variations of this, but non of them worked

I also tried

@Override
public void onDraw(Canvas canvas) {
    canvas.save();
    canvas.rotate(180, getWidth()/2, getHeight()/2);
    super.onDraw(canvas);
    canvas.restore();
}

I’ll be happy if anyone can help me with this
I can’t get this right

Thank you Very Much
Oron

Answer 1

Feed the Gallery with images using an ImageAdapter class and load the images in reverse order e.g.

gallery = (Gallery) findViewById(R.id.gallery);
Integer[] mImageIds = new Integer[] {                   
    R.drawable.chapter_5_image,
    R.drawable.chapter_4_image,
    R.drawable.chapter_3_image,             
    R.drawable.chapter_2_image,
    R.drawable.chapter_1_image};
    imageAdapter = new ImageAdapter(this, mImageIds);
    gallery.setAdapter(imageAdapter);

The ImageAdapter class should extend android.widget.BaseAdapter – there are plent of example around showing how to implement an adapter of this type.

Also, set the initial selection in the gallery as follows:

gallery.setSelection(4, true);

This should position the gallery to show the Chapter 1 image.