I have built game for android ,then I have installed it on my phone but when touch the game app nothing happen except ablack screen appears for a few seconds and then it hides.
Have you made sure you ticked the scenes you want in the build settings?
You can use the tool adb in the android toolkit from the commandline to debug launch issues.
adb logcat -s Unity will show Debug.log’s and system information about unity with the phone plugged in through usb.
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