Maintaining Connection Between Activities

[chirag-s]

Hi could you suggest the ideal way to maintain connection between activities.

I am defining the BluetoothController as static in main activity and defining a local as follows
public BluetoothController mBluetoothController = MainActivity.mBluetoothController;

and then using that object i read the incoming data

mBluetoothController.setBluetoothListener(new BluetoothListener() { ... }

This works 90% of the time but i get this error at times
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.x/com.x.yActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void co.lujun.lmbluetoothsdk.BluetoothController.setBluetoothListener(co.lujun.lmbluetoothsdk.base.BluetoothListener)' on a null object reference

Do let me know how i can resolve this issue !!

The best way to maintain a connection is to use controller API in a Thread/service that is able to survive to the Activity destroy.
Another solution (donno if could be applied to your case) is to implement a single Activity with 2 or more Fragments.