您好我正在尝试离线实现mathjax，我在github上提到这个https://github.com/leathrum/android-apps,Can任何人都有帮助，为什么这不起作用？ 我已尝试从每个样本我可以上网，目前在其他应用程序，它适用于在线时添加
<html><head><script type=\"text/javascript\" src=\"http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML\"></script><link href=\"main.css\"type=\"text/css\" rel=\"stylesheet\" /></head><body>
试过这件事......
public class MainActivity extends Activity implements OnClickListener{
private String doubleEscapeTeX(String s)
{
String s1 = "";
int i = 0;
do
{
if (i >= s.length())
{
return s1;
}
if (s.charAt(i) == '\'')
{
StringBuffer stringbuffer = new StringBuffer();
s1 = stringbuffer.append(s1).append('\\').toString();
}
if (s.charAt(i) != '\n')
{
StringBuffer stringbuffer1 = new StringBuffer();
s1 = stringbuffer1.append(s1).append(s.charAt(i)).toString();
}
if (s.charAt(i) == '\\')
{
StringBuffer stringbuffer2 = new StringBuffer();
s1 = stringbuffer2.append(s1).append("\\").toString();
}
i++;
} while (true);
}
private int exampleIndex = 0;
private String getExample(int index) {
return getResources().getStringArray(R.array.tex_examples)[index];
}
public void onCreate(Bundle bundle)
{
super.onCreate(bundle);
setContentView(R.layout.activity_main);
WebView webview = (WebView)findViewById(R.id.webview);
webview.getSettings().setJavaScriptEnabled(true);
webview.getSettings().setBuiltInZoomControls(true);
StringBuffer stringbuffer = new StringBuffer();
StringBuffer stringbuffer1 = new StringBuffer();
StringBuffer stringbuffer2 = new StringBuffer();
StringBuffer stringbuffer3 = new StringBuffer();
StringBuffer stringbuffer4 = new StringBuffer();
StringBuffer stringbuffer5 = new StringBuffer();
StringBuffer stringbuffer6 = new StringBuffer();
StringBuffer stringbuffer7 = new StringBuffer();
StringBuffer stringbuffer8 = new StringBuffer();
webview.loadDataWithBaseURL("http://bar", stringbuffer.append(stringbuffer1.append(stringbuffer2.append(stringbuffer3.append(stringbuffer4.append(stringbuffer5.append(stringbuffer6.append(stringbuffer7.append(stringbuffer8.append("<script type='text/x-mathjax-config'>").append("MathJax.Hub.Config({ ").toString()).append("showMathMenu: false, ").toString()).append("jax: ['input/TeX','output/HTML-CSS'], ").toString()).append("extensions: ['tex2jax.js'], ").toString()).append("TeX: { extensions: ['AMSmath.js','AMSsymbols.js','noErrors.js','noUndefined.js'] } ").toString()).append("});</script>").toString()).append("<script type='text/javascript' ").toString()).append("src='file:///android_asset/MathJax/MathJax.js'").toString()).append("></script><span id='math'></span>").toString(), "text/html", "utf-8", "");
EditText edittext = (EditText)findViewById(R.id.edit);
edittext.setBackgroundColor(Color.LTGRAY);
edittext.setTextColor(Color.BLACK);
edittext.setText("");
((Button)findViewById(R.id.button2)).setOnClickListener(this);
((Button)findViewById(R.id.button3)).setOnClickListener(this);
((Button)findViewById(R.id.button4)).setOnClickListener(this);
TextView textview = (TextView)findViewById(R.id.textview3);
textview.setMovementMethod(LinkMovementMethod.getInstance());
textview.setText(Html.fromHtml(textview.getText().toString()));
}
public void onClick(View view)
{
if (view == findViewById(R.id.button2))
{
WebView webview2 = (WebView)findViewById(R.id.webview);
EditText edittext1 = (EditText)findViewById(R.id.edit);
StringBuffer stringbuffer2 = new StringBuffer();
StringBuffer stringbuffer3 = new StringBuffer();
webview2.loadUrl(stringbuffer2.append(stringbuffer3.append("javascript:document.getElementById('math').innerHTML='\\\\[").append(doubleEscapeTeX(edittext1.getText().toString())).toString()).append("\\\\]';").toString());
webview2.loadUrl("javascript:MathJax.Hub.Queue(['Typeset',MathJax.Hub]);");
} else
{
if (view == findViewById(R.id.button3))
{
WebView webview1 = (WebView)findViewById(R.id.webview);
((EditText)findViewById(R.id.edit)).setText("");
webview1.loadUrl("javascript:document.getElementById('math').innerHTML='';");
webview1.loadUrl("javascript:MathJax.Hub.Queue(['Typeset',MathJax.Hub]);");
return;
}
if (view == findViewById(R.id.button4))
{
WebView webview = (WebView)findViewById(R.id.webview);
EditText edittext = (EditText)findViewById(R.id.edit);
int i = exampleIndex;
exampleIndex = i + 1;
edittext.setText(getExample(i));
if (exampleIndex > -1 + getResources().getStringArray(R.array.tex_examples).length)
{
exampleIndex = 0;
}
StringBuffer stringbuffer = new StringBuffer();
StringBuffer stringbuffer1 = new StringBuffer();
webview.loadUrl(stringbuffer.append(stringbuffer1.append("javascript:document.getElementById('math').innerHTML='\\\\[").append(doubleEscapeTeX(edittext.getText().toString())).toString()).append("\\\\]';").toString());
webview.loadUrl("javascript:MathJax.Hub.Queue(['Typeset',MathJax.Hub]);");
return;
}
}
}
}
得到这样的错误
E/AndroidProtocolHandler(26612): Unable to open asset URL: file:///android_asset/MathJax/MathJax.js
I/chromium(26612): [INFO:async_pixel_transfer_manager_android.cc(56)] Async pixel transfers not supported
I/chromium(26612): [INFO:async_pixel_transfer_manager_android.cc(56)] Async pixel transfers not supported
D/dalvikvm(26612): GC_FOR_ALLOC freed 92K, 12% free 9425K/10596K, paused 14ms, total 14ms
I/chromium(26612): [INFO:CONSOLE(1)] "Uncaught ReferenceError: MathJax is not defined", source: http://bar/ (1)
I/chromium(27592): [INFO:CONSOLE(1)] "Uncaught ReferenceError: MathJax is not defined", source: http://bar/ (1)
I/chromium(27592): [INFO:CONSOLE(1)] "Uncaught TypeError: Cannot set property 'innerHTML' of null", source: http://bar/ (1)
I/chromium(27592): [INFO:CONSOLE(1)] "Uncaught ReferenceError: MathJax is not defined", source: http://bar/ (1)
I/chromium(27592): [INFO:CONSOLE(1)] "Uncaught TypeError: Cannot set property 'innerHTML' of null", source: http://bar/ (1)
I/chromium(27592): [INFO:CONSOLE(1)] "Uncaught ReferenceError: MathJax is not defined", source: http://bar/ (1)
I/chromium(27592): [INFO:CONSOLE(1)] "Uncaught TypeError: Cannot set property 'innerHTML' of null", source: http://bar/ (1)
I/chromium(27592): [INFO:CONSOLE(1)] "Uncaught ReferenceError: MathJax is not defined", source: http://bar/ (1)
I/chromium(27592): [INFO:CONSOLE(1)] "Uncaught TypeError: Cannot set property 'innerHTML' of null", source: http://bar/ (1)
I/chromium(27592): [INFO:CONSOLE(1)] "Uncaught ReferenceError: MathJax is not defined", source: http://bar/ (1)
I/chromium(27592): [INFO:CONSOLE(1)] "Uncaught TypeError: Cannot set property 'innerHTML' of null", source: http://bar/ (1)
I/chromium(27592): [INFO:CONSOLE(1)] "Uncaught ReferenceError: MathJax is not defined", source: http://bar/ (1)
I/chromium(27592): [INFO:CONSOLE(1)] "Uncaught TypeError: Cannot set property 'innerHTML' of null", source: http://bar/ (1)
I/chromium(27592): [INFO:CONSOLE(1)] "Uncaught ReferenceError: MathJax is not defined", source: http://bar/ (1)
I/chromium(27592): [INFO:CONSOLE(1)] "Uncaught TypeError: Cannot set property 'innerHTML' of null", source: http://bar/ (1)
I/chromium(27592): [INFO:CONSOLE(1)] "Uncaught ReferenceError: MathJax is not defined", source: http://bar/ (1)
答案 0 :(得分：0)
无需使用StringBuffer，只需尝试添加以下行
WebView w = (WebView) findViewById(R.id.webview);
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'], " // output/SVG
+"extensions: ['tex2jax.js','toMathML.js'], "
+"TeX: { extensions: ['AMSmath.js','AMSsymbols.js',"
+"'noErrors.js','noUndefined.js'] }, "
+"});</script>"
+"<script type='text/javascript' "
+"src='file:///android_asset/MathJax/MathJax.js'"
+"></script>"
+"<script type='text/javascript'>getLiteralMML = function() {"
+"math=MathJax.Hub.getAllJax('math')[0];"
+"mml=math.root.toMathML(''); return mml;"
+"}; getEscapedMML = function() {"
+"math=MathJax.Hub.getAllJax('math')[0];"
+"mml=math.root.toMathMLquote(getLiteralMML()); return mml;}"
+"</script>"
+"<span id='math'></span><pre><span id='mmlout'></span></pre>","text/html","utf-8","");
w.addJavascriptInterface(new Object() { public void clipMML(String s) {
WebView ww = (WebView) findViewById(R.id.webview);
android.text.ClipboardManager clipboard = (android.text.ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);
clipboard.setText(s);
Toast.makeText(getApplicationContext(),"MathML copied to clipboard",Toast.LENGTH_SHORT).show();
}}, "injectedObject");