Android dismiss keyboard

Question

How do I dismiss the keyboard when a button is pressed?

Answer 1

    public static void hideSoftInput(Activity activity) {
    try {
        if (activity == null || activity.isFinishing()) return;
        Window window = activity.getWindow();
        if (window == null) return;
        View view = window.getCurrentFocus();
        //give decorView a chance
        if (view == null) view = window.getDecorView();
        if (view == null) return;

        InputMethodManager imm = (InputMethodManager) activity.getApplicationContext().getSystemService(Context.INPUT_METHOD_SERVICE);
        if (imm == null || !imm.isActive()) return;
        imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
    } catch (Throwable e) {
        e.printStackTrace();
    }
}