Getting zip expansion file causing NullPointerException. Zip is not placed in right directory of emulator?

问题

I'm trying to run the app in the eclipse emulator. In the ddms perspective, file explorer, I've put my .obb file inside mnt/obb/mypackage.name.example/main.1.mypackage.name.example.obb. Now Im getting NullPointerException at this line:

zip = APKExpansionSupport.getAPKExpansionZipFile(ctx,1, -1);

What could be the problem?

回答1:

The path needs to be

Android/obb/com.example.android/

Its given here

Just store the file in

/mnt/sdcard/Android/obb/

EDIT

This is a screenshot of an emulator running API Level 17

EDIT 2

In case you don't have an Android folder inside the sdcard, just create one

This folder hierarchy needs to exist

/mnt/sdcard/Android/obb/

NOTE: This will work only on devices/emulators having an sdcard. In case of a device without external storage, the path is different (since an emulated sdcard is maintained). Check here

来源：https://stackoverflow.com/questions/22281178/getting-zip-expansion-file-causing-nullpointerexception-zip-is-not-placed-in-ri