Using Java Prettify for Android app syntax highlighting

Question

I need to integrate syntax highlighting into my application for Android. I tried using Java Prettify(https://code.google.com/p/java-prettify) but I am failing to integrate it. The app is crashing. And since my avd isnt working, so I cannot get information from logcat about the crash.

I am following this info : https://code.google.com/p/java-prettify/wiki/UseTheParserAlone

My code till now :

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import prettify.PrettifyParser;
import syntaxhighlight.ParseResult;
import syntaxhighlight.Parser;

public class PrettifyHighlighter {
Map<String, String> COLORS = buildColorsMap();
String FONT_PATTERN = "<font color=\"#%s\">%s</font>";
Parser parser = new PrettifyParser();

public String highlight(String fileExtension, String sourceCode) {
    StringBuilder highlighted = new StringBuilder();
    List<ParseResult> results = parser.parse(fileExtension, sourceCode);
    for(ParseResult result : results){
        String type = result.getStyleKeys().get(0);
        String content = sourceCode.substring(result.getOffset(), result.getOffset() + result.getLength());
        highlighted.append(String.format(FONT_PATTERN, getColor(type), content));
    }
    return highlighted.toString();
}

private String getColor(String type){
    return COLORS.containsKey(type) ? COLORS.get(type) : COLORS.get("pln");
}

private static Map<String, String> buildColorsMap() {
    Map<String, String> map = new HashMap<String, String>();
    map.put("typ", "87cefa");
    map.put("kwd", "00ff00");
    map.put("lit", "ffff00");
    map.put("com", "999999");
    map.put("str", "ff4500");
    map.put("pun", "eeeeee");
    map.put("pln", "ffffff");
    return map;
}

}

While debugging, I found out that when I commented the line : Parser parser = new PrettifyParser();

and it's related lines, there was no crashing of app. I googled but failed to get a solution.

My logcat :

03-02 07:57:12.300: E/AndroidRuntime(1245): FATAL EXCEPTION: main
03-02 07:57:12.300: E/AndroidRuntime(1245): Process: com.himanshujaju.codeit, PID: 1245
03-02 07:57:12.300: E/AndroidRuntime(1245): java.lang.NoClassDefFoundError: prettify.PrettifyParser
03-02 07:57:12.300: E/AndroidRuntime(1245):     at com.himanshujaju.codeit.PrettifyHighlighter.<init>(PrettifyHighlighter.java:14)
03-02 07:57:12.300: E/AndroidRuntime(1245):     at com.himanshujaju.codeit.codeArea$Run.onPostExecute(codeArea.java:193)
03-02 07:57:12.300: E/AndroidRuntime(1245):     at com.himanshujaju.codeit.codeArea$Run.onPostExecute(codeArea.java:1)
03-02 07:57:12.300: E/AndroidRuntime(1245):     at android.os.AsyncTask.finish(AsyncTask.java:632)
03-02 07:57:12.300: E/AndroidRuntime(1245):     at android.os.AsyncTask.access$600(AsyncTask.java:177)
03-02 07:57:12.300: E/AndroidRuntime(1245):     at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:645)
03-02 07:57:12.300: E/AndroidRuntime(1245):     at android.os.Handler.dispatchMessage(Handler.java:102)
03-02 07:57:12.300: E/AndroidRuntime(1245):     at android.os.Looper.loop(Looper.java:137)
03-02 07:57:12.300: E/AndroidRuntime(1245):     at android.app.ActivityThread.main(ActivityThread.java:4998)
03-02 07:57:12.300: E/AndroidRuntime(1245):     at java.lang.reflect.Method.invokeNative(Native Method)
03-02 07:57:12.300: E/AndroidRuntime(1245):     at java.lang.reflect.Method.invoke(Method.java:515)
03-02 07:57:12.300: E/AndroidRuntime(1245):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:777)
03-02 07:57:12.300: E/AndroidRuntime(1245):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:593)
03-02 07:57:12.300: E/AndroidRuntime(1245):     at dalvik.system.NativeStart.main(Native Method)

Answer 1

I tried your code and it worked well.

  PrettifyHighlighter highlighter = new PrettifyHighlighter();
  String code = "for (int i = 0; i < 5; i++){System.out.println(i);}";
  String highlighted = highlighter.highlight("java", code);
  textView1.setText(Html.fromHtml(highlighted));

Here is the output Textview on emulator

For the NoClassDefFoundError exception, look like eclipse doesn't export jar library when it builds. Try this answer.