Program: 8216
Project: 8216
Buggy source:
/** 
 * Use Piwik.newTracker() method to create new trackers
 * @param url       (required) Tracking HTTP API endpoint, for example, http://your-piwik-domain.tld/piwik.php
 * @param siteId    (required) id of site
 * @param authToken (optional) could be null
 * @param piwik     piwik object used to gain access to application params such as name, resolution or lang
 * @throws MalformedURLException
 */
protected Tracker(@NonNull final String url,@NonNull int siteId,String authToken,@NonNull Piwik piwik) throws MalformedURLException {
  String checkUrl=url;
  if (checkUrl.endsWith("String_Node_Str") || checkUrl.endsWith("String_Node_Str")) {
    mApiUrl=new URL(checkUrl);
  }
 else {
    if (!checkUrl.endsWith("String_Node_Str")) {
      checkUrl+="String_Node_Str";
    }
    mApiUrl=new URL(checkUrl + "String_Node_Str");
  }
  mPiwik=piwik;
  mSiteId=siteId;
  mDispatcher=new Dispatcher(mPiwik,mApiUrl,authToken);
  String userId=getSharedPreferences().getString(PREF_KEY_TRACKER_USERID,null);
  if (userId == null)   getSharedPreferences().edit().putString(PREF_KEY_TRACKER_USERID,UUID.randomUUID().toString()).commit();
  mDefaultTrackMe.set(QueryParams.USER_ID,userId);
  mDefaultTrackMe.set(QueryParams.SESSION_START,DEFAULT_TRUE_VALUE);
  String resolution=DEFAULT_UNKNOWN_VALUE;
  int[] res=DeviceHelper.getResolution(mPiwik.getContext());
  if (res != null)   resolution=String.format("String_Node_Str",res[0],res[1]);
  mDefaultTrackMe.set(QueryParams.SCREEN_RESOLUTION,resolution);
  mDefaultTrackMe.set(QueryParams.USER_AGENT,DeviceHelper.getUserAgent());
  mDefaultTrackMe.set(QueryParams.LANGUAGE,DeviceHelper.getUserLanguage());
  mDefaultTrackMe.set(QueryParams.COUNTRY,DeviceHelper.getUserCountry());
  mDefaultTrackMe.set(QueryParams.VISITOR_ID,makeRandomVisitorId());
}

Fixed version (ground truth):
/** 
 * Use Piwik.newTracker() method to create new trackers
 * @param url       (required) Tracking HTTP API endpoint, for example, http://your-piwik-domain.tld/piwik.php
 * @param siteId    (required) id of site
 * @param authToken (optional) could be null
 * @param piwik     piwik object used to gain access to application params such as name, resolution or lang
 * @throws MalformedURLException
 */
protected Tracker(@NonNull final String url,int siteId,String authToken,@NonNull Piwik piwik) throws MalformedURLException {
  String checkUrl=url;
  if (checkUrl.endsWith("String_Node_Str") || checkUrl.endsWith("String_Node_Str")) {
    mApiUrl=new URL(checkUrl);
  }
 else {
    if (!checkUrl.endsWith("String_Node_Str")) {
      checkUrl+="String_Node_Str";
    }
    mApiUrl=new URL(checkUrl + "String_Node_Str");
  }
  mPiwik=piwik;
  mSiteId=siteId;
  mDispatcher=new Dispatcher(mPiwik,mApiUrl,authToken);
  String userId=getSharedPreferences().getString(PREF_KEY_TRACKER_USERID,null);
  if (userId == null) {
    userId=UUID.randomUUID().toString();
    getSharedPreferences().edit().putString(PREF_KEY_TRACKER_USERID,userId).commit();
  }
  mDefaultTrackMe.set(QueryParams.USER_ID,userId);
  mDefaultTrackMe.set(QueryParams.SESSION_START,DEFAULT_TRUE_VALUE);
  String resolution=DEFAULT_UNKNOWN_VALUE;
  int[] res=DeviceHelper.getResolution(mPiwik.getContext());
  if (res != null)   resolution=String.format("String_Node_Str",res[0],res[1]);
  mDefaultTrackMe.set(QueryParams.SCREEN_RESOLUTION,resolution);
  mDefaultTrackMe.set(QueryParams.USER_AGENT,DeviceHelper.getUserAgent());
  mDefaultTrackMe.set(QueryParams.LANGUAGE,DeviceHelper.getUserLanguage());
  mDefaultTrackMe.set(QueryParams.COUNTRY,DeviceHelper.getUserCountry());
  mDefaultTrackMe.set(QueryParams.VISITOR_ID,makeRandomVisitorId());
}