How to create .obb file as main apk expansion file

Question

I have an apk of 80Mb and so am not able to upload it on google play store. I have googled a lot and found that I have to create .obb file as the main expansion file.

Also I have found that I can create a .obb file using the jobb tool which is inside sdk > tools > jobb.bat but unfortunately it closes just after it starts.

So am I missing something?

Answer 1

Try this

$ jobb -d /temp/assets/ -o new-obb-file.obb -k secret-key -pn com.my.app.package -pv 11

Where

 -d <directory> : Set the input directory for creating an OBB file. 
 -o <filename>  : Specify the filename for the OBB file.
 -k <key>       : Specify a password for encrypting a new OBB file 
 -pn <package>  : Specify the package name for the application that mounts the OBB file,                which corresponds to the package value specified in your application's manifest. 
 -pv <version>  :   Set the minimum version for the application that can mount the OBB file, which corresponds to the android:versionCode value in your application's manifest. 

Try this command.

check following link http://developer.android.com/tools/help/jobb.html

Answer 2

i have googled and found that we shold have to make .zip with 0% (No compression) that is mention in http://developer.android.com/google/play/expansion-files.html

Tip: If you're packaging media files into a ZIP, you can use media playback calls on the files with offset and length controls (such as MediaPlayer.setDataSource() and SoundPool.load()) without the need to unpack your ZIP. In order for this to work, you must not perform additional compression on the media files when creating the ZIP packages. For example, when using the zip tool, you should use the -n option to specify the file suffixes that should not be compressed: zip -n .mp4;.ogg main_expansion media_files

OR How to make 0% compression zip using winrar?

here see the compression method

so we should have to upload this zip in play store.

so you not need to use ZipHelper.java

just simply use

ZipResourceFile expansionFile=null;

            try {
                expansionFile = APKExpansionSupport.getAPKExpansionZipFile(getApplicationContext(),3,0);

                     AssetFileDescriptor fd = expansionFile.getAssetFileDescriptor("test.mp4");
                     MediaPlayer mPlayer = new MediaPlayer();
                     mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
                     mPlayer.setDataSource(fd.getFileDescriptor(),fd.getStartOffset(),fd.getLength());
                     mPlayer.prepare();
                     mPlayer.start();

            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }