i was trying to get this specific data from my database(kelas),take a look at my code, i was searching(youtube and google) anywhere but still no answer. all i got is NullPointerException. what i’m doing here is to get this kelas value and use it in IF to show data based on this "kelas", let say ..
Category : nullpointerexception
In my code I have been trying to get the location coordinates of the user using getLastKnownLocation() This method should only be called when mLocationPermissionGranted is set to true. After getting the location coordinates I store them in an object with the method createLocation which takes 2 doubles as parameters. However, before I can reach ..
We are using lottie for a few of our animation needs. One such use case requires the animation to begin on tap – so we have added a click listener, and it works fine on most devices (just saying it here, it’s not about the click event) We get the following error (stack trace below ..
arFragment.arSceneView returns null when I use view binding. The same code works while using kotlin synthetic plugin. override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) val binding= ActivitySceneFormBinding.inflate(layoutInflater) setContentView(binding.root) ModelRenderable.builder() .setSource(this, R.raw.sunglasses2) .build() .thenAccept { modelRenderable -> glasses.add(modelRenderable) modelRenderable.isShadowCaster = false modelRenderable.isShadowReceiver = false } val sceneView = arFragment.arSceneView sceneView.cameraStreamRenderPriority = Renderable.RENDER_PRIORITY_FIRST //scene view must not be ..
I am in a dilema. I have 10 functions each respectively initialises variables. The functions are called in a try-catch loop. The problem is that when any of those variables initialisations invokes a nullpointerexception then the entire try catch loop stops / breaks and all the other/following variables in and outside the function & other ..
Exception is: java.lang.NullPointerException: Attempt to invoke virtual method ‘void android.widget.Button.setVisibility(int)’ on a null object reference I have a fragment with member variable which is Button and a getter: private Button mThrowButton; public Button getShowWordButton() { return mShowWordButton; } I initialize it in onCreateView method like so: View rootView = inflater.inflate(R.layout.fragment_throw_dice, container, false); mShowWordButton = rootView.findViewById(R.id.dice_after_throw_button); ..
I am developing MainContentPage in android studio in which i am working in Navigation View. My code is complete but i am getting Null Exception error in this line of code objectNavigationView.setNavigationItemSelectedListener(this); and in objectBottomNavigationView.setOnNavigationItemSelectedListener here is my complete java code public class MainContentPage extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener { //Fragments Objects private TextThoughts objectTextThoughts; private ..
it is again a question about my first alarm program. Here is a snippet of my code. What I found out was that when I declare an object of type Alarm: Alarm alarm; inside the try{} statement, sometimes (not always!!) when I addressed that object several lines down (alarm.getId()) I got a null object addressing ..
I’m trying to make a CardView like the twitter ones to use it with a RecyclerView. The CardView without ImageView works well, but when I add ImageView the app gives me a NullPointerException This is the code of the CardView without the ImageView (Works well) : <?xml version="1.0" encoding="utf-8"?> <androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/twoot_cardView" android:layout_width="match_parent" ..
I was following this tutorial: https://youtu.be/LyAmpfm4ndo to build an Android mobile chat app using Java. But when I try to run the code, this error java.lang.NullPointerException: Attempt to invoke virtual method ‘void androidx.appcompat.app.ActionBar.setTitle(java.lang.CharSequence)’ on a null object reference results. I have already checked my variable name(in the comment, it is suggested that some users may ..
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