多个EditText，如何判断光标在哪个EditText上，或者哪个EditText处于激活状态

   @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.fragmenttest);
        EditText et01 = (EditText) findViewById(R.id.et1);
        EditText et02 = (EditText) findViewById(R.id.et2);
        EditText et03 = (EditText) findViewById(R.id.et3);
        et01.setOnFocusChangeListener(listener);
        et02.setOnFocusChangeListener(listener);
        et03.setOnFocusChangeListener(listener);
    }
    OnFocusChangeListener listener = new OnFocusChangeListener() {
        @Override
        public void onFocusChange(View v, boolean hasFocus) {
            switch (v.getId()) {
                case R.id.et1:
                    System.out.println("==========================R.id.et1");
                    break;
                case R.id.et2:
                    System.out.println("==========================R.id.et2");
                    break;
                case R.id.et3:
                    System.out.println("==========================R.id.et3");
                    break;
                default:
                    break;
            }
        }
    };