Android Studio: Android 5 lollipop can't install and launch App -


i have 2 real android devices , used them test android app (i new @ android programing) when clicked "run" button, dialog box showed me 2 of devices: table 4.2.2 , cellphone 5.0 after running, tablet launched app perfectly, phone (5.0) wouldn't launch, wouldn't install new app, tried many time, , run, @ later time, needed remove previous app run new app.

please me resolve problem.

well, have remove old version of app time? if yes, should use keystore file signing app (and same). device refused update app because didn't sign keystore file. (i have 1 device android 5.1.1 , 1 android 4.2.2, had same issue 5.1.1 1 until signed it)


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