这段关于URL的代码在WebView中的位置是什么？

Question

我想把这段代码添加到我的Java文件中：

webView.setWebViewClient(new WebViewClient(){
   public boolean shouldOverrideUrlLoading(WebView view, String url) {
       if (url != null && url.startsWith("http://")) {
           view.getContext().startActivity(
               new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
           return true;
       } else {
           return false;
       }
   }
}

但我不知道在哪。这是我的Java文件：包sherdle.donald.duck.app；导入android.app.activity；导入Android.os.bundle；导入Android.View.Window；导入android.webkit.webchromeclient；导入android.webkit.webview；导入Android.WebKit.WebViewClient；公共类WebPageLoader扩展activity{WebView WebView；

final Activity activity = this;

@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
this.getWindow().requestFeature(Window.FEATURE_PROGRESS);
setContentView(R.layout.main);
webview = (WebView) findViewById(R.id.webview);
webview.getSettings().setJavaScriptEnabled(true);
webview.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
webview.getSettings().setSupportMultipleWindows(true);
webview.getSettings().setPluginsEnabled(true);

webview.setWebChromeClient(new WebChromeClient() {
    public void onProgressChanged(WebView view, int progress)
    {
        activity.setTitle("Loading...");
        activity.setProgress(progress * 100);

        if(progress == 100)
            activity.setTitle(R.string.app_name);
    }
 });

 webview.setWebViewClient(new WebViewClient() {


    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url)
    {
        view.loadUrl(url);
        return true;

    }
   });



 webview.loadUrl("http://www.sherdle.com/apphosting/dd");
 }

 @Override
 public void onBackPressed (){
    if(webview.canGoBack()) webview.goBack();
    else super.onBackPressed();
 }
 }

我是android的新手，我做的每件事都需要很多帮助。谢谢你的帮助。

我现在已经有了这个：包Sherdle.Donald.Duck.App；导入android.app.activity；导入Android.os.bundle；导入Android.View.Window；导入android.webkit.webchromeclient；导入android.webkit.webview；导入Android.WebKit.WebViewClient；公共类WebPageLoader扩展activity{WebView WebView；

final Activity activity = this;

@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
this.getWindow().requestFeature(Window.FEATURE_PROGRESS);
setContentView(R.layout.main);
webview = (WebView) findViewById(R.id.webview);
webview.getSettings().setJavaScriptEnabled(true);
webview.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
webview.getSettings().setSupportMultipleWindows(true);
webview.getSettings().setPluginsEnabled(true);

 webview.setWebChromeClient(new WebChromeClient() {
    public void onProgressChanged(WebView view, int progress)
    {
        activity.setTitle("Loading...");
        activity.html" target="_blank">html" target="_blank">setProgress(progress * 100);

        if(progress == 100)
            activity.setTitle(R.string.app_name);
    }
 });



 webview.setWebViewClient(new WebViewClient() {


    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url)
    {
        view.loadUrl(url);
        return true;

    }
 });

 webview.setWebChromeClient(new WebChromeClient(){
   public boolean shouldOverrideUrlLoading(WebView view, String url) {
       if (url != null && url.startsWith("http://")) {
           view.getContext().startActivity(
               new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
           return true;
       } else {
           return false;
       }
   }

  webview.loadUrl("http://www.sherdle.com/apphosting/dd");
  }



 @Override
 public void onBackPressed (){
    if(webview.canGoBack()) webview.goBack();
    else super.onBackPressed();
 }
 }

但是我在LoadUrl行上出现了这个错误：行上有多个标记-语法错误，插入“assignmentoperator Expression”以完成表达式-语法错误，插入“；”要完成FieldDeclaration-语法错误，请插入“）”要完成MethodInvocation-语法错误，请插入“}”要完成ClassBody-语法错误，请插入“；”要完成Statement-标记语法错误，构造错误

Answer 1

首先确保布局中包含webview。还要确保清单中有以下一行。

<uses-permission android:name="android.permission.INTERNET" />

然后将其添加到onCreate中。也许不是最好的，但已经足够了。

Answer 2

以这种方式使用

    @Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
this.getWindow().requestFeature(Window.FEATURE_PROGRESS);
setContentView(R.layout.main);
webview = (WebView) findViewById(R.id.webview);
webview.getSettings().setJavaScriptEnabled(true);
webview.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
webview.getSettings().setSupportMultipleWindows(true);
webview.getSettings().setPluginsEnabled(true);

 webview.setWebChromeClient(new WebChromeClient() {
    public void onProgressChanged(WebView view, int progress)
    {
        activity.setTitle("Loading...");
        activity.setProgress(progress * 100);

        if(progress == 100)
            activity.setTitle(R.string.app_name);
    }
 });



 webview.setWebViewClient(new WebViewClient() {


    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url)
    {
        view.loadUrl(url);
        return true;

    }
 });

 webview.setWebChromeClient(new WebChromeClient(){
   public boolean shouldOverrideUrlLoading(WebView view, String url) {
       if (url != null && url.startsWith("http://")) {
           view.getContext().startActivity(
               new Intent(Intent.ACTION_VIEW, Uri.parse(url)));
           return true;
       } else {
           return false;
       }
   }


  });

webview.loadUrl("http://www.sherdle.com/apphosting/dd");


 }

 @Override
 public void onBackPressed (){
    if(webview.canGoBack()) webview.goBack();
    else super.onBackPressed();
 }