New problem: APK file after build test not function in device

ionic-v1
1

I build apk file (MainActivity-debug.apk) and put in device for test, but the app not function, don’t open.
What to do?

My project is the tabs template.

2

Continuing the discussion from APK file after build test not function in device:

I fis the following, following this tutorial:

 https://blog.nraboy.com/2014/10/use-crosswalk-ionic-framework-android-apps/

typed

"cordova platform add android@3.5"

and after ionic build android, so sure gave the app open.

But now you have an error message:

"Error initializing Cordova: Class not found"

What should I do in this case.