The document describes how to detect when an Android app has been uninstalled using the inotify framework and starting an intent. It involves: 1. Using JNI to call native code from an Android app that uses inotify to monitor a directory for file deletions. 2. When inotify detects an uninstall, the native code forks a new process to start an intent using the am command. 3. This allows detecting the uninstall even after the app process is killed during uninstallation. However, forking from JNI is not recommended and can break the Android activity lifecycle.