Silent ANR

An LSPosed module that hides and logs "App isn't responding" (ANR) dialogs on Android. https://github.com/wnsdn517/Slient-ANR

Features

Feature	What it does
Dialog blocking	Hooks `AppErrors.handleShowAnrUi` in system_server so the ANR dialog never appears.
Rules	Notify / Wait / Kill / System dialog. Set a default, a rule per ANR type (input, service, broadcast, provider, job, app start, other) and a rule per app. App rule → type rule → default.
Notifications	A notification replaces the dialog, with Close app, Wait and Always wait actions. Automatic actions can post a silent notification too.
Log	App, process, PID/UID, reason (e.g. `Input dispatching timed out`) and the system report (CPU usage).
Filter and sort	Search, time range (24h / 7d / 30d / all), outcome, ANR type and app filters; newest, oldest, app name or frequency ordering.
Stats	Daily trend, outcome split, apps that hang most, ANR types.
System tab	Live memory and swap, per-app memory (PSS) and state (a process with a visible window counts as visible), kill background / force stop, kill all cached apps, drop caches (root), log retention and size limits.
System-app safety	Stopping a system app asks first; choosing Kill for a system app shows a warning.
Export	CSV export.

Install

Download SilentANR-release.apk from the latest Release and install it (SilentANR-debug.apk is the unminified build).
LSPosed manager → Modules → enable Silent ANR.
Reboot. The Overview screen shows "Working" once the hook is loaded.

The scope is fixed by the module to System Framework, so there is nothing to pick in the scope list (LSPosed/Vector show it as "Fixed by the module"). Changing actions, notifications and the like takes effect immediately, without a reboot.

How it works

InputDispatcher / ActiveServices / BroadcastQueue timeout
  └─ AnrHelper → ProcessErrorStateRecord.appNotResponding()   (Android 12+, ProcessRecord on 10–11)
        ├─ silent background ANR → killed right away       ← logged only (BG_KILLED)
        └─ SHOW_NOT_RESPONDING_UI_MSG
             └─ AppErrors.handleShowAnrUi(Message)     ← action decided here
                  ├─ mode = app rule → ANR-type rule → default (type from the ANR reason)
                  ├─ Wait / Notify: setNotResponding(false) + clearAnrDialogs() + scheduleServiceTimeoutLocked()
                  │                 (same as the dialog's "Wait" button)
                  ├─ Kill:          ActivityManagerService.killAppAtUsersRequest()  (same as "Close app")
                  └─ System dialog: original method runs

hook → app: explicit broadcast (ANR_EVENT, receiver guarded by DUMP so it can't be forged) → Room DB + notification
app → hook: a receiver registered inside system_server (guarded by the signature-level CONTROL permission), driven with ordered broadcasts
shared settings: LSPosed xposedsharedprefs + XSharedPreferences
fixed scope: META-INF/xposed/module.prop sets staticScope=true and scope.list names system. targetApiVersion is left unset and java_init.list is empty, so the framework still loads the hook through the legacy assets/xposed_init.

Requires Android 10 (API 29) or later and LSPosed (API 93+). Field and method names are resolved reflectively with per-version fallbacks.

Build

./gradlew assembleDebug

Releases are built by the Build and release APK workflow, which runs only when started by hand (Actions → Build and release APK → Run workflow) and publishes a GitHub Release tagged v<version>.

xposed-stub is a compile-only stub of the Xposed API and is not packaged into the APK (LSPosed provides it at runtime).

Silent ANR

Features

Install

How it works

Build

Releases

SilentANR v1.0.0

Assets