An util class for cleaning app data before running an Android automated test

AppDataCleaner.java

public class AppDataCleaner {
    
    public static void clearApplicationData(Context context) {
        File cache = new File(context.getFilesDir().getAbsolutePath());
        File appDir = new File(cache.getParent());
        if (appDir != null && appDir.exists()) {
            String[] children = appDir.list();
            for (String s : children) {
                if (s.equals("shared_prefs")) {
                    clearSharedPreferences(new File(appDir, s), context);
                } else if (!s.equals("lib")) {
                    deleteDir(new File(appDir, s));
                    Log.i("AppDataCleaner", "**************** File " + appDir + " " + s + " REMOVED *******************");
                }
            }
        }
    }

    public static boolean deleteDir(File dir) {
        if (dir != null && dir.isDirectory()) {
            String[] children = dir.list();
            for (int i = 0; i < children.length; i++) {
                boolean success = deleteDir(new File(dir, children[i]));
                Log.i("AppDataCleaner", "REMOVING: " + children[i]);
                if (!success) {
                    return false;
                }
            }
        }
        
        return dir.delete();
    }

    private static void clearSharedPreferences(File dir, Context context) {
        String[] children = dir.list();
        for (int i = 0; i < children.length; i++) {
            String sharedFile = children[i];
            Log.i("AppDataCleaner", "Shared Prefs removed: " + sharedFile.split("[.]")[0]);
            context.getSharedPreferences(sharedFile.split("[.]")[0], Context.MODE_PRIVATE).edit().clear().commit();
        }
    }
}