Android: Only the original thread that created a view hierarchy can touch its views - UnitTest

Question

I\'m designing UnitTest for little app. This app cout what numerology number You are using birth date. I have a problem, I what to invoke method which check number and put v

Answer 1

getActivity() implementation is as below:

   /**
         * @return The activity under test.
         */
        public T getActivity() {
            if (mActivity == null) {
                Log.w(TAG, "Activity wasn't created yet");
            }
            return mActivity;
        }

Since when getActivity() returns Activity instance, it means, it must create Activity. When Activity gets created, it must create Activity's View. Activity's View can only be created via UI Thread.

@Before
    public void setUp() throws Exception {
        mainActivity = intentsTestRule.getActivity(); / *now Activity's view gets created */
        /* Because Activity's view creation happens in UI Thread, so all the test cases, here, are used by UI Thread */
    }

Now, every test cases are inside the memory of UI Thread. Hence, you should explicitly use @UiThreadTest for every test.