Weird NullpointerException when removing fabOption

I am doing this… private void removeFabOption(FabOption fabOption) { expandableFabLayout.getPortraitConfiguration().getFabOptions().remove(fabOption); }

and get this exception… E/AndroidRuntime: FATAL EXCEPTION: main Process: com.pezcraft.myapplication, PID: 30800 java.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getVisibility()' on a null object reference at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:3416) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:3415) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:3415) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:3415) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:3415) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:3415) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:3415) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1944) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1633) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7943) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1092) at android.view.Choreographer.doCallbacks(Choreographer.java:893) at android.view.Choreographer.doFrame(Choreographer.java:812) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1078) at android.os.Handler.handleCallback(Handler.java:907) at android.os.Handler.dispatchMessage(Handler.java:105) at android.os.Looper.loop(Looper.java:216) at android.app.ActivityThread.main(ActivityThread.java:7625) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:524) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:987) I/Process: Sending signal. PID: 30800 SIG: 9

But what’s weird is that it worked at first but when I started it a 2nd, 3rd, … time, I got this exception.

By the way, I am calling the function inside onBillingSetupFinished Listener. It worked perfectly outside the listener. `

protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    expandableFabLayout = findViewById(R.id.expandableFabLayout);

    prefManager = new PrefManager(getApplicationContext());

    checkBox = findViewById(R.id.checkBox);
    linearLayoutHighestHeartrate = findViewById(R.id.linearLayoutHighestHeartrate);
    textViewHighestHeartrate = findViewById(R.id.textViewHighestHeartrate);

    //if it's still the same day, do not reset the highest heartrate of the day
    if(prefManager.getHighestHeartrateDate().equals(DateConverter.toDate(new Date()))) {
        highestHeartrate = prefManager.getHighestHeartrate();
    }
    textViewHighestHeartrate.setText(getString(R.string.textViewHighestHeartrate, highestHeartrate));

    //check subscription status
    billingClient = BillingClient.newBuilder(this).enablePendingPurchases().setListener(this).build();
    billingClient.startConnection(new BillingClientStateListener() {
        @Override
        public void onBillingSetupFinished(@NonNull BillingResult billingResult) {
            if (billingResult.getResponseCode() == BillingResponseCode.OK){
                billingClient.queryPurchasesAsync(SkuType.SUBS, (billingResult1, queryPurchasesSubs) -> {
                    if (queryPurchasesSubs.size() > 0){
                        handlePurchases(queryPurchasesSubs);
                    } else {
                        //if no item in purchase list means no, cancelled, or paused subscription
                        prefManager.setPremium(false);
                        removeFabOption(findViewById(R.id.fabOptionPremium));
                    }

                    //set keeprunning-checkbox
                    if(prefManager.isPremium() && prefManager.getKeepRunning()) {
                        checkBox.setChecked(true);
                    }

                    billingClient.queryPurchasesAsync(SkuType.INAPP, (billingResult2, queryPurchasesOnetime) -> {
                        if (queryPurchasesOnetime.size() > 0){
                            handlePurchases(queryPurchasesOnetime);
                        } else {
                            //if no item in purchase list means no, cancelled, or paused subscription
                            prefManager.setPremium(false);
                            removeFabOption(findViewById(R.id.fabOptionPremium));
                        }

                        //set keeprunning-checkbox
                        if(prefManager.isPremium() && prefManager.getKeepRunning()) {
                            checkBox.setChecked(true);
                        }
                    });
                });

                //query prices for BottomSheetDialog
                getSubPrice();
                getOnetimePrice();
            }
        }

        @Override
        public void onBillingServiceDisconnected() {
            Log.d(DEBUG, "Billing Service disconnected.");
        }
    });`

Any ideas, how I can use it inside the listener?

[Pezcraft]

@kabumere Yes, it did. Thank you very much 😃

[kabumere]

Hey @Pezcraft,

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