To use Qt Creator to develop Qt applications for Android, you need Qt for Android and a tool chain that Qt Creator can automatically download, install, and configure for you. The following video shows the whole process from installing Qt for Android to debugging an application on an Android device:

The adb tool includes a client and server that run on the development host and a daemon that runs on the emulator or device.

Qt Creator integrates the Android Debug Bridge ( adb) command line tool for deploying applications to Android devices, running them, and reading their logs. To enable helpful code editing features for Java, such as code completion, highlighting, function tooltips, and navigating in code, add a Java language server. Qt Creator can automatically download and install the tool chain and create a suitable build and run kit that has the tool chain and the Qt version for Android for the device's architecture. To develop for Android, you must install a tool chain for building applications for Android devices on the development PC. You can connect Android devices to the development PC using USB cables to build, run, debug, and analyze applications from Qt Creator.

Android studio avd manager