Android : Idea for Simple Android Application like photo frame

I want to make an application like photo frame which allows people to select layout (2 photos layout, 3 photos layout...etc)

For each layout, I will separate it into frames and load image into these frame.

So that, If users select "2 photos layout", they have 2 frames and they must load 2 images into these 2 frames.

My question is:

1. 
   

   Which type of layout/View should I use for frame (loading, re-positioning image inside frame)?

   
   


2. 
   

   How can I merge inserted images inside these frames into 1 images (Saving frame)