In the beta before 1.8.0.11 I had 2 worlds that I enjoyed playing on, one made before the beta and one made after. One day I went to open the one made before and it crashed, so I created a new one, but within 2 days that one started crashing as well.

I have 2 worlds that I am really proud of but now I cant open them ever since the beta before 1.8.0.10.  This has happened on both a world I made before the beta and a world I made in the beta.  I have done as much as I can to fix it such as uninstalling and reinstalling the game, clearing the games data, clearing the games cache, and removing the worlds from the minecraft com.mojang folder, creating a new world, and putting the folders back, but still nothing has fixed  the issue.

I am also on a samsung galaxy s9