“Unfortunately, Alexa Voice Service Companion has stopped” in China
Following "Alexa Voice Service Sample App", when running mobile app on Android, the message “Unfortunately, Alexa Voice Service Companion has stopped” prompted, then app quit. Besides, I cannot find the place to set device address to https://10.0.2.2:8443.
Could you provide a logcat output? It will help debug why the Android app crashed. As far as the place to put 10.0.2.2:8443, there should be a text box in the UI of the Android app. You're not setting its IP address, you're just telling the app what it is.