The Qt Android Automotive back end consists of the JNI wrapper that communicates between Qt and the Java Car API. During the back end initialization, a set of conditions must be met to ensure that the car API back end is going to work as excepted. The following conditions are checked:

• The Android version is at least Android 10 (Q).
• The OS is Android Automotive (i.e. supports FEATURE_AUTOMOTIVE).
• The APK is signed with the correct platform key.

If any of the above conditions are not met, the app reports a descriptive error message and aborts immediately. You can set the environment variable NO_FATAL_PREREQUISITES_FAIL to avoid aborting the app, and only print an error message. If all conditions are met, the back end proceeds to initialization as expected.