WebView：加载网址时出现错误请求

Question

当我尝试在 WebView 中加载 URL 时：

private final WebViewClient webViewClient = new WebViewClient() {
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        loadUrl(url);
        return true;
    }
};
webView.setWebViewClient(webViewClient);
webView.loadUrl("https://post.craigslist.org/");

我在页面上得到了这个 html：

错误请求

您的浏览器发送了此服务器无法理解的请求。

onReceivedError(WebView view, int errorCode, String description, String failingUrl) 回调中也没有任何内容。

Answer 1

它给你这个错误是因为你没有正确处理来自这个网页的重定向 试试这个

webview.setWebViewClient(new WebViewClient() {
  public boolean shouldOverrideUrlLoading(WebView view, String url){
    // do your handling codes here, which url is the requested url
    // probably you need to open that url rather than redirect:
    view.loadUrl(url);
    return false; // then it is not handled by default action
 }
});

Answer 2

试试这样：

public class WebPageLoader extends Activity
 {

   final Activity activity = this;
   private String html;
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
      super.onCreate(savedInstanceState);
      this.getWindow().requestFeature(Window.FEATURE_PROGRESS);
      setContentView(R.layout.activity_main);
      WebView webView = (WebView) findViewById(R.id.webview);
      webView.getSettings().setJavaScriptEnabled(true);

webview.loadUrl("https://post.craigslist.org/");

       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 void onReceivedError(WebView view, int errorCode, String description, String failingUrl)
        {

        }

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

 }
}       

Answer 3

尝试改变

public boolean shouldOverrideUrlLoading(WebView view, String url) {
    loadUrl(url);
    return true;
}

这个给

public boolean shouldOverrideUrlLoading(WebView view, String url) {
    return super.shouldOverrideUrlLoading(view, url);
}

希望对你有帮助。

更新

mWebView = (WebView) getView().findViewById(R.id.webView1);
if (Patterns.WEB_URL.matcher(url).matches())
        mWebView.loadUrl(url);      

webClient = new WebViewClient() {       

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

    @Override
    public void onFormResubmission(WebView view, Message dontResend,
            Message resend) {
        // TODO Auto-generated method stub
        super.onFormResubmission(view, dontResend, resend);
    }

    @Override
    public void onLoadResource(WebView view, String url) {
        super.onLoadResource(view, url);
        if (url.contains("purchasehistory.html")) {
            mURLNavigation.onURLNavigation(3);
        }
    }

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

WebSettings webSettings = mWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
mWebView.setWebViewClient(webClient);

这段代码对我有用..

Answer 4

遇到此类问题时，最好保留 API 级别编号。

例如，在 API 19 中，函数 shouldOverrideUrlLoading 调用失败检查此，http://developer.android.com/guide/webapps/migrating.html

注意： shouldOverrideUrlLoading 在加载类似 url 时不会被调用

loadUrl("http://google.com")

而且重定向不适用于 API 级别 11 及更低级别。 （正如你回复阿卜杜勒，它不叫）

使用解决方法：我的意思是覆盖适用于所有版本的 onPageStarted。但是，唯一的问题是它稍后会被调用。

完全随机解决：

在 Android 4.1.1 上使用 WebView.getSettings().setUseWideViewPort(true)，它可以工作。

Answer 5

这是在 WebView 中加载 url 的方式：

private WebView URL

URL = (WebView) WebDialog.findViewById(R.id.url1);  
URL.setWebViewClient(new WebViewClient());
URL.setScrollbarFadingEnabled(true);  
URL.setHorizontalScrollBarEnabled(false);  
URL.getSettings().setJavaScriptEnabled(true);
URL.getSettings().setUserAgentString("My URL");  
URL.loadUrl("//the first url goes here");

然后您需要构建一个类似于此的布局作为 xml 文件：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <RelativeLayout

        <WebView
            android:id="@+id/ticketline"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_below="@id/Title"
            android:layout_marginTop="5dip" />
    </RelativeLayout>

</LinearLayout>

希望这会有所帮助:)

Answer 6

        webview.loadUrl("http://route.izooto.com/?id=1563543&client=41882&rid=4188273230385&frwd=aHR0cHM6Ly93d3cuZ29vZ2xlLmNvbT91dG1fc291cmNlPWl6b290byZ1dG1fbWVkaXVtPXB1c2hfbm90aWZpY2F0aW9ucyZ1dG1fY2FtcGFpZ249VGVzdCBpWm9vdG8gTFAmdXRtX2NvbnRlbnQ9JnV0bV90ZXJtPQ==&bkey=f9_DIVuweYA:APA91bFE9x7PN6J5Oy67NypwlT8ZT3Qgz0VSYtCT4_DH5v4l7mCsY7q3aqSrOh6mCcWKIjz4aRiOWQ8ap85r85vHiTh3Mc8n4MiHSnbMXUKGB_5HkDjiBCQg5a7IQifvrakl7bIXF_oA");
       WebViewClient webClient = new WebViewClient() {

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

            @Override
            public void onFormResubmission(WebView view, Message dontResend,
                                           Message resend) {
                // TODO Auto-generated method stub
                super.onFormResubmission(view, dontResend, resend);
            }

            @Override
            public void onLoadResource(WebView view, String url) {
                super.onLoadResource(view, url);
                if (url.contains("purchasehistory.html")) {
                   // mURLNavigation.onURLNavigation(3);
                }
            }

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

        WebSettings webSettings = webview.getSettings();
        webSettings.setJavaScriptEnabled(true);
        webview.setWebViewClient(webClient);