My friend and i are developing a android game. This is my first time develop android game, so we don't know how to code

The game is 2d game and we develop it without 3rd party engine / framework. Now we got a few questions, hope you can help us.

1. In game play, using 'Surfaceview' only to achieve it. Is it best practice?
2. On 'Surfaceview', a lot of difference button(Menu, pause, game object..etc) is on it, but I don't know how to code it? (actually, i have already done, but...so stupid way. Detect the user touch position (x, y) to identify where they touch[rect(x1,y1,x2,y2).contain(x,y)] Is it right? Teach me how to do if wrong.
3. View / Surfaceview / OpenGL, which is suitable for us? (if like Tetris)

Thank you for your help.

Ps: My english is not good, hope you can understand what i mean.