App published to Android device stops

[DonTeee]

Hello all:

I am working on my first Unity project; I inherited it from a previous author and am using Unity 2017.3.0f3. It is a fairly modest marketing piece designed for mobile devices. I am using Vuforia, and this in itself doesn’t seem to be a problem. When I open my published app on a Samsung SM-T813 tablet connected to my computer, the camera feed shows just fine in the app. However, when I click a button on this initial screen to go to a screen where a target image will be locked onto by the camera, the app immediately closes and a dialog box invites me to restart the app.

I have Googled and read the accounts of others who have had this problem of app stoppage. Many previous responders recommended Android Studio’s logcat. I have used this, but no matter how I filter it, it displays new entries in such profusion and frequency that I feel like I’m drinking from a fire hose.

I realize that I haven’t provided much detail yet, but I’m hoping someone can steer me in the right direction.

Thank you.

Don

[JeffDUnity3D]

We will need to see the code that runs when you click the button.

[DonTeee]

Thank you for your reply, Jeff. I am attaching a screen shot of the inspector for the button which appears to make the published Android app stop. It has a “Button (Script)” component with its “Transition” property set to “Animation” and a directive to set “GameObject.SetActive” to false for the game object “BKG_main” (of which it is a child) and set “GameObject.SetActive” to true for the game object “Menu_find_image_target”. This appears to the user as if he is “advancing” from “slide” “BKG_main” to “slide” “Menu_find_image_target.”

Since I first started this thread, I have found that the offending button does not stop the app when clicked if before publishing I deactivate a “back” button child of “Menu_find_image_target” which is set to deactivate “Menu_find_image_target” and activate “BKG_main” on being clicked.

Don