Data sharing between two apps.. Android

Moreover, making any file MODE_WORLD_READABLE or (worse) MODE_WORLD_WRITEABLE is a bad idea. You lose any hope of security.

If you wish to share data between two applications, there are a myriad of solutions, such as:

• service with an API exposed by AIDL
• service with an API exposed via commands sent via startService() and responses sent via aMessenger or createPendingResult() PendingIntent or something
• content provider
• broadcast Intents

All of those allow you to define permissions for integration and let you control the granularity of access.

android:sharedUserId -> http://developer.android.com/guide/topics/manifest/manifest-element.html

Reference link -http://codeoncloud.blogspot.in/2012/06/data-sharing-between-two-android.html

http://androiddhamu.blogspot.in/2012/03/share-data-across-application-in.html