Javascript Android材质选项卡栏和webview

我在网上找到了这个项目：

这是android在材料设计中的一个模板，我想在每个选项卡栏中添加不同的web视图，当我尝试添加时，它会给我带来很多语法错误。 代码如下：

public class SampleFragment extends Fragment {

    private static final String ARG_POSITION = "position";
    private WebView myWebView;
    private String LOG_TAG = "AndroidWebViewActivity";

    private int position;

    public static SampleFragment newInstance(int position) {
        SampleFragment f = new SampleFragment();
        Bundle b = new Bundle();
        b.putInt(ARG_POSITION, position);
        f.setArguments(b);
        return f;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        position = getArguments().getInt(ARG_POSITION);
        View rootView = inflater.inflate(R.layout.page, container, false);

        ProgressBarCircular progressBarCircular = (ProgressBarCircular) rootView.findViewById(R.id.progress);
        FloatingActionButton fab = (FloatingActionButton) rootView.findViewById(R.id.fabButton);
        fab.setDrawableIcon(getResources().getDrawable(R.drawable.plus));


        switch (position) {
            case 0:

                myWebView = (WebView) findViewById(R.id.webView);

                //enable Javascript
                myWebView.getSettings().setJavaScriptEnabled(true);

                //loads the WebView completely zoomed out
                myWebView.getSettings().setLoadWithOverviewMode(true);

                //true makes the Webview have a normal viewport such as a normal desktop browser
                //when false the webview will have a viewport constrained to it's own dimensions
                myWebView.getSettings().setUseWideViewPort(true);

                //override the web client to open all links in the same webview
                myWebView.setWebViewClient(new MyWebViewClient());
                myWebView.setWebChromeClient(new MyWebChromeClient());

                //Injects the supplied Java object into this WebView. The object is injected into the
                //JavaScript context of the main frame, using the supplied name. This allows the
                //Java object's public methods to be accessed from JavaScript.
                myWebView.addJavascriptInterface(new JavaScriptInterface(this), "Android");

                //load the home page URL
                myWebView.loadUrl("http://demo.mysamplecode.com/Servlets_JSP/pages/androidWebView.jsp");


                break;
            case 1:



                break;
            case 2:



                break;
            case 3:


                break;
        }

        return rootView;
    }
}

我想说：

 myWebView = (WebView) findViewById(R.id.webView);

                //enable Javascript
                myWebView.getSettings().setJavaScriptEnabled(true);

                //loads the WebView completely zoomed out
                myWebView.getSettings().setLoadWithOverviewMode(true);

                //true makes the Webview have a normal viewport such as a normal desktop browser
                //when false the webview will have a viewport constrained to it's own dimensions
                myWebView.getSettings().setUseWideViewPort(true);

                //override the web client to open all links in the same webview
                myWebView.setWebViewClient(new MyWebViewClient());
                myWebView.setWebChromeClient(new MyWebChromeClient());

                //Injects the supplied Java object into this WebView. The object is injected into the
                //JavaScript context of the main frame, using the supplied name. This allows the
                //Java object's public methods to be accessed from JavaScript.
                myWebView.addJavascriptInterface(new JavaScriptInterface(this), "Android");

                //load the home page URL
                myWebView.loadUrl("http://demo.mysamplecode.com/Servlets_JSP/pages/androidWebView.jsp");

在每个“案例”中，更改url 但这是我得到的错误：

错误：（33，10）找不到符号方法 setArguments（android.os.Bundle）错误：（39,20）找不到符号 方法getArguments（）错误：（63，48）找不到符号类 MyWebViewClient错误：（64，50）找不到符号类 MyWebChromeClient错误：（69，54）找不到符号类 JavaScriptInterface

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您是否创建了MyWebViewClient和MyWebChromeClient类？