I have upgraded metaio SDK to version 6, and experiencing issue in Android device having OS version 4.0. I'm getting the following error.
Could not find class 'com.metaio.sdk.ARViewActivity$1', referenced from method com.metaio.sdk.ARViewActivity.onCreate
Could not find class 'android.hardware.display.DisplayManager', referenced from method com.metaio.sdk.ARViewActivity.onPause
Could not find class 'android.hardware.display.DisplayManager', referenced from method com.metaio.sdk.ARViewActivity.onResume
I couldn't find the reason for this error.