获取HTML在Android网页视图不工作 [英] Getting HTML from Android Webview not working
问题描述
按标题，我试图获取当前视图内容的HTML。这就是我如何做到这一点：
As per title, I am trying to get HTML of current webview content. This is how I do it:
WebView webView = (WebView)findViewById(R.id.webView);
webView.getSettings().setJavaScriptEnabled(true);
WVClient wvClient = new WVClient();
wvClient.setFirst(true);
webView.setWebViewClient(wvClient);
webView.addJavascriptInterface(new MyJavaScriptInterface(this), "HtmlViewer");
webView.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress){
progressBar.setProgress(progress);
}
});
webView.loadUrl("http://www.somthing.com");
MyJavaScriptInterface类：
MyJavaScriptInterface class:
public class MyJavaScriptInterface {
private Context ctx;
MyJavaScriptInterface(Context ctx) {
this.ctx = ctx;
}
public void showHTML(String html) {
Log.i("log","showHTML: "+html);
}
}
WVClient类：
WVClient Class:
public class WVClient extends WebViewClient {
private boolean first;
public WVClient() {
super();
setFirst(false);
}
public void onPageFinished(WebView view, String url) {
// TODO Auto-generated method stub
super.onPageFinished(view, url);
if(first){
builder.append("javascript:__doPostBack('promotions_landing$A1','');");
builder.append("javascript:window.HtmlViewer.showHTML('<html>'+document.getElementsByTagName('html')[0].innerHTML+'</html>');");
view.loadUrl(builder.toString());
setFirst(false);
}
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
public boolean isFirst() {
return first;
}
public void setFirst(boolean first) {
this.first = first;
}
}
似乎一切权利，但它不工作。 showHTML（）在MyJavascriptInterface不叫。什么我错过了？
Everything seems right, but it's not working. showHTML() in MyJavascriptInterface is not called. What have I missed?
推荐答案
我已经找到了答案。错误是在MyJavaScriptInterface类，JavascriptInterface类实现了这样的注释@JavascriptInterface已被写入如下MyJavaScriptInterface类注释，有没有类构造函数。
I have found the answer. Mistake is at MyJavaScriptInterface class, JavascriptInterface class implements Annotation thus annotation @JavascriptInterface has to be written in MyJavaScriptInterface class as below and there's no class constructor.
MyJavaScriptInterface类：
MyJavaScriptInterface class:
public class MyJavaScriptInterface{
@JavascriptInterface
public void showHTML(String html) {
Log.i("log","showHTML: "+html);
}
}
和的WebView addJavascriptInterface变化如下相应：
And webView's addJavascriptInterface change accordingly as below:
webView.addJavascriptInterface(new MyJavaScriptInterface(), "HtmlViewer");
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