Xposed is a native Android runtime hooking framework and instrumentation tool. It provides a modified version of the Android app process binary to intercept and modify the behavior of system and application processes at the binary level.
The framework enables Android operating system customization by altering internal function calls and runtime execution flow. It achieves this through native process instrumentation, allowing for the modification of functionality without altering original application files.
The tool covers several low-level capabilities, including native library injection and zygote-based hooking to apply modifications to child processes. It utilizes binary-level process modification and dynamic method interception to redirect execution flow from system functions to custom handlers.