14. LIST CHAT ROOM
DiuitMessagingAPI.listChats(new DiuitCallback<ArrayList<DiuitChat>>()
{
@Override
public void onSuccess(final ArrayList<DiuitChat> chats)
{
// if success, return chatArrayList
}
@Override
public void onFailure(final int code, final JSONObject resultObj)
{
// if failure, it will return error code and result
}
});