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Rare Earth Juejin Tech Community
Rare Earth Juejin Tech Community
Feb 20, 2024 · Mobile Development

Hooking Android Looper Observer for Message Timing Monitoring and Bypassing Hidden APIs

This article explains how to use reflection and dynamic proxies to hook the hidden Android Looper.Observer API for detailed message‑dispatch timing, demonstrates code examples for installing and removing the hook, discusses workarounds for hidden‑API restrictions and the .dex loading changes introduced in Android 14.

AndroidHidden APIHook
0 likes · 13 min read
Hooking Android Looper Observer for Message Timing Monitoring and Bypassing Hidden APIs
Rare Earth Juejin Tech Community
Rare Earth Juejin Tech Community
Jan 2, 2024 · Mobile Development

Hooking Android Looper Observer for Message Timing Monitoring and Bypassing Hidden APIs

This article explains how to use Android's hidden Looper$Observer API via reflection and dynamic proxies to monitor long‑running messages on the main thread, classify their execution time, and bypass hidden‑API restrictions, with complete code examples and practical tips for Android 10‑14.

AndroidHidden APILooper
0 likes · 11 min read
Hooking Android Looper Observer for Message Timing Monitoring and Bypassing Hidden APIs
360 Tech Engineering
360 Tech Engineering
Apr 19, 2018 · Mobile Development

Bypassing Android P Hidden API Restrictions: Three Practical Methods

This article analyzes the restriction mechanism of hidden APIs in Android P Preview 1 and presents three verified techniques—direct module provisioning, class‑loader manipulation, and access‑flag tampering—that allow developers to invoke system hidden APIs without triggering runtime warnings.

AndroidAndroid PBypass
0 likes · 8 min read
Bypassing Android P Hidden API Restrictions: Three Practical Methods
360 Tech Engineering
360 Tech Engineering
Apr 5, 2018 · Mobile Development

Understanding Android P Hidden API Restrictions and Their Implementation

This article explains how Android P’s DP1 preview restricts non‑SDK API usage by detailing the hidden‑API greylist mechanism, the compilation‑time processing that marks methods and fields in dex files, and the runtime checks performed by the ART virtual machine to enforce these restrictions.

Access FlagsAndroidCompilation
0 likes · 8 min read
Understanding Android P Hidden API Restrictions and Their Implementation