In the past, updating an SDK tool meant downloading the entire new version. To save bandwidth and time, Google introduced a patching system. Because the format of these patches changed over time, different "patcher" versions were released.
– Some older patchers (like Lucky Patcher, Core Patch, or custom ROM patchers) use versioned SDK patch appliers to modify APKs or framework code at runtime or during installation. patcher v4 sdk patch applier v4
The Patcher v4 SDK provides Python bindings for rapid prototyping: In the past, updating an SDK tool meant