Android: Using findViewById() with a string / in a loop

Question

I'm making an android application, where there is a view composed of hundreds of buttons, each with a specific callback. Now, I'd like to set these callbacks using a loop, instead of having to write hundreds of lines of code (for each one of the buttons).

My question is: How can I use findViewById without statically having to type in each button id? Here is what I would like to do:

    for(int i=0; i<some_value; i++) {        for(int j=0; j<some_other_value; j++) {         String buttonID = "btn" + i + "-" + j;         buttons[i][j] = ((Button) findViewById(R.id.buttonID));         buttons[i][j].setOnClickListener(this);        }     } 

Thanks in advance!

Answer 1

You should use getIdentifier()

for(int i=0; i<some_value; i++) {    for(int j=0; j<some_other_value; j++) {     String buttonID = "btn" + i + "-" + j;     int resID = getResources().getIdentifier(buttonID, "id", getPackageName());     buttons[i][j] = ((Button) findViewById(resID));     buttons[i][j].setOnClickListener(this);    } }