Caused by java.lang.NullPointerException Attempt to invoke virtual method 'void com.app.android.faceTracker.CameraSourcePreview.start(com.google.android.gms.vision.CameraSource, com.app.android.faceTracker.GraphicOverlay)' on a null object reference

[orafoxinc]

Hi,

We are getting this error:

It seems it's device specific error: Device: LenovoTB-X304F/Lenovo TAB4 [Lenovo TAB4 10] OS Version: 8.1

It makes app crash after allowing camera permission. Please help to fix this issue.

Caused by java.lang.NullPointerException: Attempt to invoke virtual method 'void com.app.android.faceTracker.CameraSourcePreview.start(com.google.android.gms.vision.CameraSource, com.app.android.faceTracker.GraphicOverlay)' on a null object reference at com.app.android.activity.CameraCaptureActivity.startCameraSource(CameraCaptureActivity.java:505) at com.app.android.activity.CameraCaptureActivity.onResume(CameraCaptureActivity.java:234) at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1356) at android.app.Activity.performResume(Activity.java:7131) at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3559) at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3624) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2865) at android.app.ActivityThread.-wrap11(Unknown Source) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1592) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:164) at android.app.ActivityThread.main(ActivityThread.java:6518) at java.lang.reflect.Method.invoke(Method.java) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)