Activityinstrumentationtestcase2 Issues - Test Hangs Because Of Invalidate() Call In The Code I'm Writing A Test For

I'm implementing a test for some code I've written which I have distilled down into a sample project pasted below. The problem I am having is that the test hangs the test runner an

Solution 1:

Try postInvalidate() instead of invalidate().

I'm not 100% sure what's going on but I suspect there's something in your code that's blocking the UI thread. Using postInvalidate() will return right away and let your code finish, which will unblock the UI thread.

Solution 2:

Problem solved!

the invalidate call is NOT needed.. it screws things up PERIOD!

The trick was to add a method to HelloGallery.java to set the center position and to call setPosition on the super class.

HelloGallery.java

publicvoidsetSelectionToCenter(int position){
    mCenterViewPositionIndex = position;
    setSelection(mCenterViewPositionIndex);
}

Then in HelloGalleryActivity call the setSelectionToCenter method rather than setSelection.

HelloGalleryActivity

public void onCreate(Bundle savedInstanceState) {
    ...
    ((HelloGallery)mGallery).setSelectionToCenter(adapter.MIDDLE);
    ...
}

The test runs like a charm now! Woot! Thanks goes out to Betsy the mystery developer for tracking this down for me!