加载Flash网站时,Android Webview滚动行为不正常

Java代码：

package com.sample.webview;

import android.app.Activity;
import android.app.ProgressDialog;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;

public class SampleWebViewActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        final WebView webView = (WebView) findViewById(R.id.webview);

        final ProgressDialog progress = new ProgressDialog(this);
        progress.setMessage("loading");

        webView.getSettings().setJavaScriptEnabled(true);
        webView.getSettings().setPluginsEnabled(true);
        webView.getSettings().setBuiltInZoomControls(true);

        webView.setWebViewClient(new WebViewClient() {

            @Override
            public void onPageStarted(WebView view,String url,Bitmap favicon) {
                super.onPageStarted(view,url,favicon);
                progress.show();
            }

            @Override
            public void onPageFinished(WebView view,String url) {
                super.onPageFinished(view,url);
                progress.dismiss();
            }
        });

        Button mButton = (Button) findViewById(R.id.button);
        mButton.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {   
    webView.loadUrl("http://www.fusioncharts.com/demos/features/#linkedcharts-for-easy-drill-down");
            }
        });   
    }
}

main.xml中：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/button"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_margin="5dp"
        android:text="Load URL" />

    <WebView
        android:id="@+id/webview"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_margin="5dp" />

</LinearLayout>

现在,当页面完全加载并且我试图向下滚动以查看其余内容时,webview将出现在“加载URL”按钮之上.检查截图：

虽然看起来像：

请建议,我应该怎么做才能使它正常工作.

编辑：我正在使用Galaxy Note(OSv2.3.5),安装了最新版本的Flash Player和Adobe Air.