How to add two arraylist which has different data in android to get a single listview

问题

I have two arraylist. Arraylist one contains list of usrs in my chat app ArrayList Two contains list of Groups in my chat app What i am trying to do here is i want add user list with list of groups in my chat app.

This is my first arraylist: Here User is my model class userMap is HashMap which has all th User list

ArrayList<User> users = new ArrayList<User>();
        for (User user : SocketSingleton.userMap.values()) {
            if (user.getId() != loggedUserId) {
                users.add(user);
            }
        }

Adapter for my first arraylist is

UserAdapter adapter1 = new UserAdapter(getActivity(),R.layout.all_user_list_item,users);

This is my second arraylist which has all the groups Here Channel is my model class for groups. And listchannels is HashMap which has all the groups.

 ArrayList<Channel> groups = new ArrayList<JoinedChannel>();
        for (Channel channel : SocketSingleton.listchannels.values()) {
            groups.add(channel);
        }

Adapter for second array list

 ChannelAdapter adapter2 = new ChannelAdapter(getActivity(), R.layout.grouplist, groups);

I want to add the two lists So that i can set that single listview which contains all user and groups to a AutocompleteTextview Please tell me a way to do that.

回答1:

you can not combine two different adapter. As an option, is to create a separate class that will include something in common between two objects, like:

class ChatObject{
private int id;
prvate String title;
private boolean isUser;
}

dont forget to add constructor and get/set methods.

And when you are filling your arrays, also create your new Objects which will be using in your listview.

ArrayList<User> users = new ArrayList<User>();
ArrayList<ChatObject > chatObjects= new ArrayList<ChatObject >();
        for (User user : SocketSingleton.userMap.values()) {
            if (user.getId() != loggedUserId) {
                users.add(user);
                ChatObject chatObject = new ChatObject();
                chatObject.setId(user.getId());
                chatObject.setTitle(user.getName());  //for example
                chatObject.setIsUser(true);
                chatObjects.add(chatObject);
            }
        }

and

ArrayList<Channel> groups = new ArrayList<JoinedChannel>();
        for (Channel channel : SocketSingleton.listchannels.values()) {
            groups.add(channel);
            ChatObject chatObject = new ChatObject();
            chatObject.setId(channel.getId());
            chatObject.setTitle(channel.getTitle());  //for example
            chatObject.setIsUser(false);
            chatObjects.add(chatObject);
        }

Hope it helps you ;)

来源：https://stackoverflow.com/questions/33805996/how-to-add-two-arraylist-which-has-different-data-in-android-to-get-a-single-lis

标签

android

listview

arraylist

adapter

autocompletetextview