public void onStop(){
  if (null != mService) {
    if (null != mContext) {
      mContext.unbindService(mServiceConnection);
    }
    mServiceConnection=null;
    mService=null;
  }
}

public void onStop ( ) { if ( null != mService ) { if ( null != mContext ) { mContext . unbindService ( mServiceConnection ) ; } mServiceConnection = null ; mService = null ; } }
unbinds the in - app billing service .
