Question

I’m making Sudoku game. There are two classes: difficulty and Screen class. When the ‘easy’ button is pressed, I want to generate a random number from 1 to 9, and that numbers should go to the Screen class layout.

My ‘easy’ button is in choosedifficulty class layout.

Answer 1

Be carefull cause a sudoku is not only “random numbers from 1 to 9”, so I recommend you to implement the algorithm properly. (Take a look at http://en.wikipedia.org/wiki/Sudoku_algorithms).

About passing data from one activity to another, you can use the intent. For example:

//In the place you launch your game
Intent myIntent = new Intent(myContext, Screen.class);
//sudoku is a String, for example, that contains the sudoku you want to pass
myIntent.putExtra("sudokukey", sudoku);
startActivity(myIntent);

And then, to retrieve the data:

Bundle bundle = getIntent().getExtras();
String mySudoku = bundle.getString("sudokukey");