android webview點擊返回鍵返回上一級activity

android webview點擊返回鍵返回上一個activity

@Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        // TODO Auto-generated method stub
        if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }