Javascript 从webview中的API传递json数据时,在android webview中集成MATHJAX时出错
我需要将MATHJAX集成到我的android webview中,以解析通过API以json格式传输的mathml数据。我引用了以下内容: 当我写这段代码时:Javascript 从webview中的API传递json数据时,在android webview中集成MATHJAX时出错,javascript,android,webview,mathjax,mathml,Javascript,Android,Webview,Mathjax,Mathml,我需要将MATHJAX集成到我的android webview中,以解析通过API以json格式传输的mathml数据。我引用了以下内容: 当我写这段代码时: public void fillWebView(final WebView w, final String yourHtml) { w.getSettings().setJavaScriptEnabled(true); w.getSettings().setBuiltInZoomControls(true); w.
public void fillWebView(final WebView w, final String yourHtml) {
w.getSettings().setJavaScriptEnabled(true);
w.getSettings().setBuiltInZoomControls(true);
w.loadDataWithBaseURL("http://bar", "<script type='text/x-mathjax-config'>"
+ "MathJax.Hub.Config({ "
+ "showMathMenu: false, "
+ "jax: ['input/TeX','output/HTML-CSS'], "
+ "extensions: ['tex2jax.js'], "
+ "TeX: { extensions: ['AMSmath.js','AMSsymbols.js',"
+ "'noErrors.js','noUndefined.js'] } "
+ "});</script>"
+ "<script type='text/javascript' "
+ "src='file:///android_asset/MathJax/MathJax.js'"
+ "></script><span id='math'></span>", "text/html", "utf-8", "");
w.loadUrl("javascript:document.getElementById('math').innerHTML='\\\\["
+ doubleEscapeTeX(yourHtml)
+ "\\\\]';");
w.loadUrl("javascript:MathJax.Hub.Queue(['Typeset',MathJax.Hub]);");
}
private String doubleEscapeTeX(String s) {
String t = "";
for (int i = 0; i < s.length(); i++) {
if (s.charAt(i) == '\'') t += '\\';
if (s.charAt(i) != '\n') t += s.charAt(i);
if (s.charAt(i) == '\\') t += "\\";
}
return t;
}
我尝试了这个解决方案:
所以我的新代码是这样的:
[INFO:CONSOLE(1)] "Uncaught TypeError: Cannot set property 'innerHTML' of null", source: (1)
04-21 19:57:05.449 26698-26698/com.myclasscampus I/chromium: [INFO:CONSOLE(1)] "Uncaught ReferenceError: MathJax is not defined", source: (1)
public void fillWebView(final WebView w, final String yourHtml) {
w.getSettings().setJavaScriptEnabled(true);
w.getSettings().setBuiltInZoomControls(true);
w.loadDataWithBaseURL("http://bar/", "<script type='text/x-mathjax-config'>"
+ "MathJax.Hub.Config({ "
+ "showMathMenu: false, "
+ "jax: ['input/TeX','output/HTML-CSS'], "
+ "extensions: ['tex2jax.js'], "
+ "TeX: { extensions: ['AMSmath.js','AMSsymbols.js',"
+ "'noErrors.js','noUndefined.js'] } "
+ "});</script>"
+ "<script type='text/javascript' "
+ "src='file:///android_asset/MathJax/MathJax.js'"
+ "></script><span id='math'></span>", "text/html", "utf-8", "");
w.setWebViewClient(new WebViewClient() {
@Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT){
loadUrlKitKat(w,doubleEscapeTeX(yourHtml));
}
else{
w.loadUrl("javascript:document.getElementById('math').innerHTML='\\\\["
+ doubleEscapeTeX(yourHtml)
+ "\\\\]';");
w.loadUrl("javascript:MathJax.Hub.Queue(['Typeset',MathJax.Hub]);");
}
}
});
}
@TargetApi(Build.VERSION_CODES.KITKAT)
private void loadUrlKitKat(WebView w,String param){
w.evaluateJavascript("javascript:document.getElementById('math').innerHTML='<font color=\"#97FD97\">`"+param+"`</font>';",null);
w.evaluateJavascript("javascript:MathJax.Hub.Queue(['Typeset',MathJax.Hub]);",null);
}
private String doubleEscapeTeX(String s) {
String t = "";
for (int i = 0; i < s.length(); i++) {
if (s.charAt(i) == '\'') t += '\\';
if (s.charAt(i) != '\n') t += s.charAt(i);
if (s.charAt(i) == '\\') t += "\\";
}
return t;
}
注意:我没有在我的web视图中传递任何web url。我的web视图是用XML定义的,我需要解析来自API的mathml数据。(作为json对象)
请指导我如何解决这个问题。也许是这样
[INFO:CONSOLE(1)] "Uncaught SyntaxError: Unexpected token ILLEGAL", source: (1)