如何在android中滑动Webview页面

<WebView
    android:id="@+id/webview"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
/>

WebView webView = findViewById(R.id.webview);
webView.setWebViewClient(new WebViewClient());
webView.loadUrl("https://www.example.com");

public class MainActivity extends AppCompatActivity implements GestureDetector.OnGestureListener {
    private GestureDetector gestureDetector;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        gestureDetector = new GestureDetector(this, this);
    }

    // 实现GestureDetector.OnGestureListener接口的方法
    @Override
    public boolean onDown(MotionEvent e) {
        return false;
    }

    @Override
    public void onShowPress(MotionEvent e) {
    }

    @Override
    public boolean onSingleTapUp(MotionEvent e) {
        return false;
    }

    @Override
    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
        return false;
    }

    @Override
    public void onLongPress(MotionEvent e) {
    }

    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
        // 在这里处理滑动事件
        if (e1.getY() - e2.getY() > 50) {
            // 向上滑动
            webView.scrollBy(0, 100);
        } else if (e2.getY() - e1.getY() > 50) {
            // 向下滑动
            webView.scrollBy(0, -100);
        }
        return true;
    }

    // 在Activity或Fragment中重写onTouchEvent方法，将触摸事件传递给GestureDetector处理
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        return gestureDetector.onTouchEvent(event);
    }
}

webView.getSettings().setJavaScriptEnabled(true);
webView.setScrollBarStyle(WebView.SCROLLBARS_INSIDE_OVERLAY);