uiAutomator failing on 4.1.2 device

Question

When playing with the Android uiAutomator I've run into an issue when trying to run the tests on a 4.1.2 device. When using the code from the enter link description here an exception is thrown when attempting to scroll the apps tray.

I originally thought it was caused by compiling against api 17 rather than 16 but that doesn't seem to be true. Anyone else encountered this?

Exception raised:

[exec] java.lang.reflect.InvocationTargetException [exec] at java.lang.reflect.Method.invokeNative(Native Method) [exec] at java.lang.reflect.Method.invoke(Method.java:511) [exec] at com.example.runTests(Runner.java:124) [exec] at com.example.testExecutor(Runner.java:60) [exec] at java.lang.reflect.Method.invokeNative(Native Method) [exec] at java.lang.reflect.Method.invoke(Method.java:511) [exec] at junit.framework.TestCase.runTest(TestCase.java:168) [exec] at junit.framework.TestCase.runBare(TestCase.java:134) [exec] at junit.framework.TestResult$1.protect(TestResult.java:115) [exec] at junit.framework.TestResult.runProtected(TestResult.java:133) [exec] at junit.framework.TestResult.run(TestResult.java:118) [exec] at junit.framework.TestCase.run(TestCase.java:124) [exec] at com.android.uiautomator.testrunner.UiAutomatorTestRunner.start(UiAutomatorTestRunner.java:124) [exec] at com.android.uiautomator.testrunner.UiAutomatorTestRunner.run(UiAutomatorTestRunner.java:85) [exec] at com.android.commands.uiautomator.RunTestCommand.run(RunTestCommand.java:76) [exec] at com.android.commands.uiautomator.Launcher.main(Launcher.java:83) [exec] at com.android.internal.os.RuntimeInit.nativeFinishInit(Native Method) [exec] at com.android.internal.os.RuntimeInit.main(RuntimeInit.java:235) [exec] at dalvik.system.NativeStart.main(Native Method) [exec] Caused by: java.lang.NoSuchMethodError: com.android.uiautomator.core.UiScrollable.setAsHorizontalList [exec] at com.example.Runner.launchAppFromHomeScreen(Test.java:45) [exec] ... 19 more

Answer 1

UIAutomator's codes has changes:

4.1.1 method : public void setAsHorizontalList ()
4.2 method : public UIScrollable setAsHorizontalList ()

It's maybe you are using API-17's UIAutomator to build the tests but running on a API-16 device. Try using the corresponding UIAutomator.jar