my virtual device in android studio does not open my application

Question

I was creating an application, and soon after adding strings to some textviews I tried to do a test, I selected my virtual device, however, when the device started a white screen with the google symbol and a load bar appeared,as usual, but the upload never ends, android studio informed me 2 problems, I believe the first is responsible for this: 1-Mulator Unable to open app... permission denied. 2-null value in entry,incremental Folder=null... would like to know what I do to solve the problem

Answer 1

Remove the folder . Radle and try again.

Sources:

https://discuss.gradle.org/t/null-value-in-entry-dependencycachedir-null/19191

https://www.quora.com/How-do-I-resolve-Error-null-value-in-entry-otherFileOutputs-null-Information-BUILD-FAILED-During-Gradle-build-in-Android-Studio-2-3-1

Answer 2

1. Open the Android Studio
2. Configure -> AVD Manager
3. Choose the device you want to use -> Wipe Data

4) Try to open the device again