StrictMode violation: reading files from the disk in the main thread

[lihenggui]

Background

The RootService.bind method has to be called in the main thread, or it will throw an exception:

java.lang.IllegalStateException: This method can only be called on the main thread
at com.topjohnwu.superuser.internal.RootServiceManager.enforceMainThread(RootServiceManager.java:122)
at com.topjohnwu.superuser.internal.RootServiceManager.bindInternal(RootServiceManager.java:248)
at com.topjohnwu.superuser.internal.RootServiceManager.createBindTask(RootServiceManager.java:285)
at com.topjohnwu.superuser.ipc.RootService.bindOrTask(RootService.java:146)
at com.topjohnwu.superuser.ipc.RootService.bind(RootService.java:112)
at com.topjohnwu.superuser.ipc.RootService.bind(RootService.java:126)

But the code violates StrictMode:

StrictMode policy violation; ~duration=10 ms: android.os.strictmode.DiskReadViolation
at android.os.StrictMode$AndroidBlockGuardPolicy.onReadFromDisk(StrictMode.java:1666)
at libcore.io.BlockGuardOs.access(BlockGuardOs.java:74)
at libcore.io.ForwardingOs.access(ForwardingOs.java:128)
at android.app.ActivityThread$AndroidOs.access(ActivityThread.java:8053)
at java.io.UnixFileSystem.checkAccess(UnixFileSystem.java:313)
at java.io.File.exists(File.java:813)
at android.app.ContextImpl.getDataDir(ContextImpl.java:3196)
at android.app.ContextImpl.getCodeCacheDir(ContextImpl.java:905)
at com.topjohnwu.superuser.internal.Utils.hasStartupAgents(Utils.java:130)
at com.topjohnwu.superuser.internal.RootServiceManager.startRootProcess(RootServiceManager.java:153)
at com.topjohnwu.superuser.internal.RootServiceManager.createBindTask(RootServiceManager.java:292)
at com.topjohnwu.superuser.ipc.RootService.bindOrTask(RootService.java:146)
at com.topjohnwu.superuser.ipc.RootService.bind(RootService.java:112)
at com.topjohnwu.superuser.ipc.RootService.bind(RootService.java:126)

If the application enables the StrictMode, the application will be killed. There is no workaround to fix this issue temporarily.

How to reproduce Enable the StrictMode with detectAll option.