android webview点击返回键返回上一级activity

android webview点击返回键返回上一个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);
    }