We then designed CIDER to automatically detect callback compatibility issues based on static analysis. CIDER is built on top of Soot framework. CIDER now can detect issues induced by CCFG structural changes. To test whether CIDER is useful for detecting real issues in Android apps, we evaluate CIDER on 20 real Android apps collected from GitHub. In total, CIDER found 13 callback compatibility issues, and 9 of them have been fixed by the original developers.