Calling from not trusted UID

问题

When I was running UIAutomator in Android Studio, a crash shows sometimes.

 W/ActivityManager: Crash of app com.example.testsample running instrumentation ComponentInfo{com.example.testsample.test/android.support.test.runner.AndroidJUnitRunner}
07-16 19:19:34.191 7834-7850/? W/Binder: Binder call failed.
java.lang.SecurityException: Calling from not trusted UID!
    at android.app.UiAutomationConnection.throwIfCalledByNotTrustedUidLocked(UiAutomationConnection.java:427)
    at android.app.UiAutomationConnection.shutdown(UiAutomationConnection.java:324)
    at android.app.IUiAutomationConnection$Stub.onTransact(IUiAutomationConnection.java:209)
    at android.os.Binder.execTransact(Binder.java:570)

But it didn't shows every time. I can run successfully when this not showed. Can Anyone help me? Thanks.

回答1:

private void throwIfCalledByNotTrustedUidLocked() {
    final int callingUid = Binder.getCallingUid();
    if (callingUid != mOwningUid && mOwningUid != Process.SYSTEM_UID
            && callingUid != 0 /*root*/) {
        throw new SecurityException("Calling from not trusted UID!");
    }
}

This is the method which throws your error. Perhaps the uid is different than the process uid or the uid on that device is not root. Maybe you can add some prints in your app to find out.

来源：https://stackoverflow.com/questions/51360801/calling-from-not-trusted-uid