  Mobile software engineering has been a hot research topic for decades. Our
fellow researchers have proposed various approaches (with over 7,000
publications for Android alone) in this field that essentially contributed to
the great success of the current mobile ecosystem. Existing research efforts
mainly focus on popular mobile platforms, namely Android and iOS. OpenHarmony,
a newly open-sourced mobile platform, has rarely been considered, although it
is the one requiring the most attention as OpenHarmony is expected to occupy
one-third of the market in China (if not in the world). To fill the gap, we
present to the mobile software engineering community a research roadmap for
encouraging our fellow researchers to contribute promising approaches to
OpenHarmony. Specifically, we start by presenting a literature review of mobile
software engineering, attempting to understand what problems have been targeted
by the mobile community and how they have been resolved. We then summarize the
existing (limited) achievements of OpenHarmony and subsequently highlight the
research gap between Android/iOS and OpenHarmony. This research gap eventually
helps in forming the roadmap for conducting software engineering research for
OpenHarmony.
