在 android 4.4 上加载资产文件时未捕获的 ReferenceError [英] Uncaught ReferenceError while loading asset file on android 4.4
问题描述
我正在使用以下 MathJax 应用程序代码.http://cs.jsu.edu/wordpress/?p=498#comment-217
I am using following MathJax app code. http://cs.jsu.edu/wordpress/?p=498#comment-217
在以下函数中，我试图从资产目录加载文件.
In following function i am trying to load file from asset directory.
public static boolean makeMathView_new(WebView webview) {
webview.getSettings().setRenderPriority(RenderPriority.HIGH);
webview.getSettings().setJavaScriptEnabled(true);
webview.loadDataWithBaseURL("http://bar", "<script type='text/x-mathjax-config'>"
+"MathJax.Hub.Config({ messageStyle: 'none', showMathMenu: false, jax: ['input/TeX','output/HTML-CSS'], "
+"extensions: ['tex2jax.js'],"
+ "'HTML-CSS': { scale: 100 },"
+"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", "");
return true;
}
在 android 4.4 模拟器上运行时，出现以下错误.
When running on android 4.4 emulator, I am getting following errors.
V/WebViewChromium(1342): Binding Chromium to the background looper Looper{b1da1340}
I/chromium(1342): [INFO:library_loader_hooks.cc(112)] Chromium logging enabled: level = 0, default verbosity = 0
I/BrowserProcessMain(1342): Initializing chromium process, renderers=0
W/chromium(1342): [WARNING:proxy_service.cc(888)] PAC support disabled because there is no system implementation
E/chromium(1342): [ERROR:gl_surface_egl.cc(153)] No suitable EGL configs found.
E/chromium(1342): [ERROR:gl_surface_egl.cc(620)] GLSurfaceEGL::InitializeOneOff failed.
E/chromium(1342): [ERROR:gl_surface_egl.cc(153)] No suitable EGL configs found.
E/chromium(1342): [ERROR:gl_surface_egl.cc(620)] GLSurfaceEGL::InitializeOneOff failed.
E/chromium(1342): [ERROR:gpu_info_collector.cc(86)] gfx::GLSurface::InitializeOneOff() failed
I/chromium(1101): [INFO:CONSOLE(1)] "Uncaught ReferenceError: MathJax is not defined", source: http://bar/ (1)
更新:在合并了 ksasq 的建议后，这是我的新代码，但它仍然无法正常工作.
Update: After incorporating ksasq's suggestion , Here is my new code but it is still not working.
webview.loadDataWithBaseURL("http://bar", "<script type='text/x-mathjax-config'>"
+ "function setupMathJax() {"
+ "MathJax.Hub.Config({ messageStyle: 'none', showMathMenu: false, jax: ['input/TeX','output/HTML-CSS'], "
+"extensions: ['tex2jax.js'],'HTML-CSS': { scale: 100 },"
+"TeX: { extensions: ['AMSmath.js','AMSsymbols.js','noErrors.js','noUndefined.js'] } });"
+ "}"
+ "</script>"
+ "<script type='text/javascript' src='file:///android_asset/MathJax/MathJax.js'></script>"
+ "<body onload='setupMathJax()'>"
+ "<span id='math'></span>"
+ "</body>"
,"text/html","utf-8", "");
推荐答案
您必须将所有行 loadUrl(...) 替换为 evaluateJavascript(...)>.但这仅适用于 KitKat(API 19 或更高版本)，因此您需要先进行 SDK 版本检查:
You have to replace all the lines loadUrl(...) with evaluateJavascript(...). But this is only for KitKat (API 19 or above), so you need to do an SDK version check first:
if (android.os.Build.VERSION.SDK_INT < 19) {
mWebView.loadUrl("javascript:MathJax.Hub.Queue(['Typeset',MathJax.Hub]);");
} else {
mWebView.evaluateJavascript("javascript:MathJax.Hub.Queue(['Typeset',MathJax.Hub]);",null);
}
这篇关于在 android 4.4 上加载资产文件时未捕获的 ReferenceError的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
