Most PE maps these days use the .mcworld format. This is a special file just for minecraft. To INSTALL MINECRAFT PE MAPS (BEDROCK) ON ANDROID , Just click it and it will automatically install the bedrock map into your game no matter what system you’re on.
However, some PE maps still use the older system that will usually be a a .zip file.
INSTALL MINECRAFT PE MAPS (BEDROCK) ON ANDROID
1.) Install “ASTRO File Manager” on your Android device from the Google Play Store or Amazon Appstore. Other File Managers for Android can work as well.
2.) Use the browser on your device to find a map and download it.
3.) Once you’ve downloaded a map, open “ASTRO File Manager” and click on the “Download” folder.
4.) Click on the zip archive file of the map.
5.) Press and hold the map folder until this Icon shows up in the top left: Once this is pressed, it should say “Copying 1 item” at the bottom with a “Cancel” and “Paste” button under it.
6.) Go back to the Primary folders in ASTRO (where the “Download” folder was located) and then go to “games > com.mojang > minecraftWorlds”.
7.) Click the “Paste” button at the bottom and your map should now be installed.
You can also simply connect your Android device to a computer with a USB cable and find the “games\com.mojang\minecraftWorlds” folder, then copy and paste the map folder into it.