Illegal forward reference while importing a package class in Android

Question

As title suggests, illegal forward reference I have already seen already posted posts those are belonging to java code. But in my case, I am having issue in package import. Everything was fine perfectly but suddenly I don't know what happened to Android Studio, it started showing me below error

error: illegal forward reference

When I checked build area of Android Studio section under Java compiler and double clicked the error it took me to below packed import statement.

import com.abacusoft.util.AppController;

What is missing or wrong in it? Any help?

My AppController class extending Application class as mentioned below

public class AppController extends Application

EDIT: Below is my complete AppController class

package com.abacusoft.util;

import android.app.Application;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import com.abacusoft.services.CallReceivingService;
import com.android.volley.Request;
import com.android.volley.RequestQueue; 
import com.android.volley.toolbox.Volley;

public class AppController extends Application {
public static final String TAG = AppController.class.getSimpleName();

private RequestQueue mRequestQueue;
private static SharedPreferences preferences;

private static AppController mInstance;
private boolean isAppRunningFirstTime = true;

@Override
public void onCreate() {
    super.onCreate();
    mInstance = this;
    preferences = this.getSharedPreferences(AppSharedPref.APP_PREFS, Context.MODE_PRIVATE);

}

@Override
public void onTerminate() {
    super.onTerminate();
    stopService(new Intent(getApplicationContext(), CallReceivingService.class));
}

public static synchronized AppController getInstance() {
    return mInstance;
}

//Get Shared Preference
public SharedPreferences getPreferences() {
    return preferences;
}

public RequestQueue getRequestQueue() {
    if (mRequestQueue == null) {
        mRequestQueue = Volley.newRequestQueue(getApplicationContext());
    }

    return mRequestQueue;
}


public <T> void addToRequestQueue(Request<T> req, Object tag) {
    req.setTag(tag);
    getRequestQueue().add(req);

}

public <T> void addToRequestQueue(Request<T> req) {
    req.setTag(TAG);
    getRequestQueue().add(req);
}

public void cancelPendingRequests(Object tag) {
    if (mRequestQueue != null) {
        mRequestQueue.cancelAll(tag);
    }
}

public boolean isAppRunningFirstTime() {
    return isAppRunningFirstTime;
}

public void setAppRunningFirstTime(boolean appRunningFirstTime) {
    isAppRunningFirstTime = appRunningFirstTime;
}

}

are you initializing any variables in declarators ? (maybe just post the entire AppController class) — jonathan Heindl, Apr 02 '19 at 16:50
I have updated my code of AppController class @jonathanHeindl — Abdul Waheed, Apr 02 '19 at 16:53
something I more or less just made up ... I meant variables you instance on class instantiation (like TAG in your example) / compilation maybe like in this example https://stackoverflow.com/questions/1746758/illegal-forward-reference-in-java — jonathan Heindl, Apr 02 '19 at 16:58
but it was working fine couple of minutes ago like TAG I was using before as well. — Abdul Waheed, Apr 02 '19 at 17:05
does a similar structure exist for AppController ins your service class ? — jonathan Heindl, Apr 02 '19 at 17:06

score 0 · Answer 1 · answered Apr 02 '19 at 17:07

0

you are probably calling AppController.getInstance not on the class but on the instance you want to create

something like AppController appController=appController.getinstance()should be

AppController appController=AppController.getinstance()

capital A

answered Apr 02 '19 at 17:07

jonathan Heindl

844
7
16

hmm let me check and confirm – Abdul Waheed Apr 02 '19 at 17:09
compiler error is taking me to import statemtent. As I said when I doudble click on java compile section for error. it is taking me to import statement with background highleted with yellow color – Abdul Waheed Apr 02 '19 at 17:14
where are you calling getInstance ? can you give an example ? – jonathan Heindl Apr 02 '19 at 17:23
I am calling getinstance method in many places in android service – Abdul Waheed Apr 02 '19 at 17:26
like this AppController.getInstance().isAppRunningFirstTime() – Abdul Waheed Apr 02 '19 at 17:26
I directly call getinstance and on that instance I am calling any method that is required – Abdul Waheed Apr 02 '19 at 17:26
weird that should just get you a null pointer oO since you never create an Instance of AppController oO (or did you make sure onCreate ran before calling tihs) – jonathan Heindl Apr 02 '19 at 17:30
dear I am not getting any exception while compiling I am facing this issue – Abdul Waheed Apr 02 '19 at 17:38
nope - maybe it help to remember what you changed since the last time it worked oO – jonathan Heindl Apr 02 '19 at 18:05
I have found this Reformat with Rearrange Entries can create illegal forward reference via this link https://confluence.jetbrains.com/display/IDEADEV/IntelliJ+IDEA+14+138.1503.3+Release+Notes can you help me with this ? – Abdul Waheed Apr 02 '19 at 18:24

Illegal forward reference while importing a package class in Android

1 Answers1