WebView.getUrl（）返回null [英] WebView.getUrl() returns null

问题描述

我有一个网页视图的问题。我编程我自己WebChromeClient类中重写onProgressChanged方法，因为我想说明的页面，当它完成加载，然后隐藏闪屏。正如我只是希望它有一个特定的URL发生，我比较特定字符串的实际的WebView网址，但有一个问题，我得到一个空指针时webview.getUrl（）方法被调用，我的应用程序完成。
这是code：

I have an issue with Webview. I'm programming my own WebChromeClient class overriding onProgressChanged method because I want to show the page when it finishes loading and then, to hide the splash screen. As I just want it to happen with a specific url, I compare the actual WebView url with a specific string, but there is a problem, I get a null pointer when webview.getUrl() method is called and my application finishes. This is the code:

private class MyWebChromeClient extends WebChromeClient {
    @Override
    public void onProgressChanged (WebView webview, int newProgress) {
        super.onProgressChanged(webview,newProgress);
        if(webview.equals(w1) && newProgress == 100 && webview.getUrl().startsWith("https://ssl.facebook.com/login.php")) { 
            webview.setVisibility(WebView.VISIBLE);
            ImageView imageview = (ImageView)findViewById(R.id.ivsplash);
            imageview.setVisibility(ImageView.GONE);
            ProgressBar progressbar = (ProgressBar)findViewById(R.id.pbsplash);
            progressbar.setVisibility(ProgressBar.GONE);
        }
    }
}

我这样做对避免的WebView需要三四秒来渲染页面，但它不工作。在code我之前所用的是：

I do this for avoid the webview takes three or four seconds to render the page, but it doesn't work. The code I used before was:

private class MyWebViewClient extends WebViewClient {
    @Override
    public boolean shouldOverrideUrlLoading(WebView webview, String url) {
        super.shouldOverrideUrlLoading(webview, url);
        webview.loadUrl(url);
        return true;
    }

    @Override
    public void onPageFinished(WebView webview, String url) {
        if(url.startsWith("https://ssl.facebook.com/login.php")) {
            webview.setVisibility(WebView.VISIBLE);
            ImageView imageview = (ImageView)findViewById(R.id.ivsplash);
            imageview.setVisibility(ImageView.GONE);
            ProgressBar progressbar = (ProgressBar)findViewById(R.id.pbsplash);
            progressbar.setVisibility(ProgressBar.GONE);
        }
    }
}

感谢

推荐答案

不知道这是可能的 WebChromeClient ，但我可以做到这一点使用

Not sure if this is possible with WebChromeClient, but I was able to do this using

WebViewClient 和重载 onLoadResource ， onReceivedError 和 onPageFinished

这是我做了什么

onLoadResource     
 mwebview.setVisibility(View.GONE);


onReceivedError
mwebview.setVisibility(View.VISIBLE);

onPageFinished
mwebview.setVisibility(View.VISIBLE);

和intially在XML web视图设置为GONE

and intially in XML the webview is set as GONE

android:visibility="gone"

我也用它来Facebook和正常工作。

I too use it for Facebook and works fine.

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