How to create OBB files USING jobb tool Android

Question

My app has grown to be over 50mb, so I now need to use an expansion file. On searching I came to know that there are different files that can be used as expansion files such as

Answer 1

my cmd saying jobb is not recognise as internal or external command

Add /tools to your path or instead of jobb use path/to/sdk/tools/jobb.bat

which type of files are put in these obb files

Big ones. Like drawables, sounds etc. Then, for example, you can use this code to put drawable file into ImageView:

imageView.setImageBitmap(
    BitmapFactory.decodeFile(
        sm.getMountedObbPath("/path/to/obb/file") + 
        "path/to/file/in/obb.png")

or, play sound:

mp.setDataSource(AcItem.this, 
    Uri.fromFile(new File(
        sm.getMountedObbPath("/path/to/obb/file") + 
        "path/to/file/in/obb.png"));
mp.prepare();
mp.start();

As I promised, GitHub link to my obb manager class: https://github.com/uncleLem/AndroidUtils/blob/master/src/io/github/unclelem/androidutils/utils/ObbExpansionsManager.java I hope it would help.