Question

im new to android programming and i ran into a problem. here is the code snippet

nums = (GridView) findViewById(R.id.nums);
for(int i=0; i < 10; i++) {
    Button b = new Button(this);
    b.setText(i+"");
    b.setTextSize(15);
    b.setTextColor(Color.CYAN);
    b.setOnClickListener(numsClickHandler);
    nums.addView(b, 20, 20);
}

the problem occurs when it reaches nums.addView(b, 20, 20);

caused by: java.lang.unsupportedoperationexception: addView(View, int, layoutparams) is    
not supported in adapterview

Answer 1

The Error message is clear, GridView is an AdapterView which does not allow directly adding view to it, rather, it works like ListView that you need to supply an adapter to it, and in your adapter, provide the Views. The GridView tutorial may help.