TestErrorInfo.printClass(this, "com.android.bluetooth.opp.Constants");

    public static void printClass(Context cc, String clsName) {
      try {
         Context c = cc.createPackageContext("com.android.bluetooth", Context.CONTEXT_INCLUDE_CODE | Context.CONTEXT_IGNORE_SECURITY);
//載入這個類
Class clazz = c.getClassLoader().loadClass(clsName);
 
android.util.Log.w(TestEnv.TAG, "method: " + clazz.getName());
Field[] ff = clazz.getDeclaredFields();
         for (Field f : ff) {
            android.util.Log.w(TestEnv.TAG, "field: " + f.getName());
}
      } catch (Throwable e) {
         e.printStackTrace();
}
   }