All I have used osmdroid and i want to download map zip files from android app and than create offline map. Any one have more knowledge about osmdroid and offline map and navigation.
The easisest way is to download MOBAC, then run it and mark out an area you want, store the tiles in Osmdroid.zip format. When that's done, drop the zip file into the osmdroid folder on your device.
First of all you need to download Mobile Atlas Creator. This link is for the latest version of MOBAC
1- In Mobile Atlas Creator select your area of interest.
2- Select your Map Source
3- Select Zoom Levels
4- Add Selection
5- Create Atlas
6- After downloading is finished move the zip-file to /mnt/sdcard/osmdroid/ on your device.
You can find more details about next steps HERE
来源：https://stackoverflow.com/questions/9747765/how-can-download-map-in-osmdroid