How to hide the hand animation?

[sarimmehdi]

I tried to hide animation using the following code:

@Override
public void onAttachFragment(@NonNull FragmentManager fragmentManager, @NonNull Fragment fragment) {
    if (fragment.getId() == R.id.arFragment) {
        arFragment = (ArFragment) fragment;
        arFragment.setOnSessionConfigurationListener(this);
        arFragment.setOnViewCreatedListener(this);
        arFragment.setInstructionsController(null);
    }
}

But I still see it.

[grassydragon]

Hi!
Can you try using this method instead?

sceneform-android/ux/src/main/java/com/google/ar/sceneform/ux/InstructionsController.java

Line 92 in 445d78e

public void setEnabled(boolean enabled) {

[sarimmehdi]

I replaced the line arFragment.setInstructionsController(null); with arFragment.getInstructionsController().setEnabled(false); but now I get the following error (InstructionController is null):

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.memex.eu, PID: 18158
    java.lang.NullPointerException: Attempt to invoke virtual method 'void com.google.ar.sceneform.ux.InstructionsController.setEnabled(boolean)' on a null object reference
        at com.memex.eu.MainActivity.onAttachFragment(MainActivity.java:687)
        at androidx.fragment.app.FragmentManager.dispatchOnAttachFragment(FragmentManager.java:3428)
        at androidx.fragment.app.Fragment.performAttach(Fragment.java:2927)
        at androidx.fragment.app.FragmentStateManager.attach(FragmentStateManager.java:464)
        at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:275)
        at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:2189)
        at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:2100)
        at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:2002)
        at androidx.fragment.app.FragmentManager.dispatchStateChange(FragmentManager.java:3138)
        at androidx.fragment.app.FragmentManager.dispatchActivityCreated(FragmentManager.java:3072)
        at androidx.fragment.app.FragmentController.dispatchActivityCreated(FragmentController.java:251)
        at androidx.fragment.app.FragmentActivity.onStart(FragmentActivity.java:502)
        at androidx.appcompat.app.AppCompatActivity.onStart(AppCompatActivity.java:246)
        at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1455)
        at android.app.Activity.performStart(Activity.java:8075)
        at android.app.ActivityThread.handleStartActivity(ActivityThread.java:3660)
        at android.app.servertransaction.TransactionExecutor.performLifecycleSequence(TransactionExecutor.java:221)
        at android.app.servertransaction.TransactionExecutor.cycleToPath(TransactionExecutor.java:201)
        at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:173)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:97)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2210)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loopOnce(Looper.java:201)
        at android.os.Looper.loop(Looper.java:288)
        at android.app.ActivityThread.main(ActivityThread.java:7839)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)
D/TransportRuntime.SQLiteEventStore: Storing event with priority=HIGHEST, name=FIREBASE_CRASHLYTICS_REPORT for destination cct
D/TransportRuntime.JobInfoScheduler: Scheduling upload for context TransportContext(cct, HIGHEST, MSRodHRwczovL2NyYXNobHl0aWNzcmVwb3J0cy1wYS5nb29nbGVhcGlzLmNvbS92MS9maXJlbG9nL2xlZ2FjeS9iYXRjaGxvZ1xBSXphU3lCcnBTWVQ0RkZMMDlyZUhKaTZIOUZZZGVpU25VVE92Mk0=) with jobId=733556379 in 1000ms(Backend next call timestamp 1644370635756). Attempt 1
I/Process: Sending signal. PID: 18158 SIG: 9

[sarimmehdi]

I solved the problem by trying @grassydragon 's suggestion in the onViewCreated (also suggested by him) function instead of the onAttachFragment function.

@Override
public void onViewCreated(@NonNull ArSceneView arSceneView) {
    arSceneView.getScene().addOnUpdateListener(this::onUpdateFrame);
    InstructionsController instructionsController = arFragment.getInstructionsController();
    if (instructionsController != null) {
        instructionsController.setEnabled(false);
    }
}

[grassydragon]

It should be also possible to call this method in onViewCreated.

[sarimmehdi]

thanks, I updated my answer