Android 使用FirebaseListAdapter填充ExpandableListView
在过去的4个月里,我一直在与Firebase合作,我发现了一个我非常希望能够深入了解的主题。 现在,我可以在Android应用程序中使用FirebaseListAdapter作为标准的ListView,但我想增强我的应用程序以使用ExpandableListView 场景:Android 使用FirebaseListAdapter填充ExpandableListView,android,listview,firebase,expandablelistview,firebase-realtime-database,Android,Listview,Firebase,Expandablelistview,Firebase Realtime Database,在过去的4个月里,我一直在与Firebase合作,我发现了一个我非常希望能够深入了解的主题。 现在,我可以在Android应用程序中使用FirebaseListAdapter作为标准的ListView,但我想增强我的应用程序以使用ExpandableListView 场景: 我在应用程序上向开放社区发布请求,当人们查看时,他们可以在两个用户之间创建私人对话。我希望显示ExpandableListView,以便将组作为来自请求的信息,并将每个子级作为关联对话的信息 Fragment_Message
我在应用程序上向开放社区发布请求,当人们查看时,他们可以在两个用户之间创建私人对话。我希望显示ExpandableListView,以便将组作为来自请求的信息,并将每个子级作为关联对话的信息 Fragment_Message_History.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:weightSum="18">
<TextView
android:id="@+id/unresolved_text"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:gravity="center"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="@string/unresolved_string"
android:textStyle="bold"
android:paddingRight="10dp"
android:paddingLeft="10dp"
android:background="@drawable/action_bar_bg"/>
<ExpandableListView
android:layout_width="match_parent"
android:layout_height="0dp"
android:id="@+id/unresolvedListView"
android:layout_gravity="center_horizontal"
android:layout_weight="8"/>
</LinearLayout>
在这一点上,我觉得远程接近实现这一目标的方法将与Firebase DB结构化建议背道而驰,即采用扁平结构,并将对话映射为请求的子级
有人知道如何填充ExpandableListView吗?
谢谢大家
public class MessageHistoryFragment extends Fragment {
ExpandableListView unresolvedList;
ExpandableListView resolvedList;
boolean truth = false;
private Firebase mFirebaseConvoRef;
private Firebase mFirebasePostRef;
FirebaseListAdapter<PostRequest> unresolvedAdapter;
FirebaseListAdapter<ConversationClass> resolvedAdapter;
private Firebase userAuth;
private Query unresolvedQuery;
public static MessageHistoryFragment newInstance(){return new MessageHistoryFragment();}
public MessageHistoryFragment(){
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_message_history, container, false);
unresolvedList = (ExpandableListView) view.findViewById(R.id.unresolvedListView);
resolvedList = (ExpandableListView) view.findViewById(R.id.resolvedListView);
return view;
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
truth = true;
super.onCreate(savedInstanceState);
mFirebaseConvoRef = new Firebase("https://<id>.firebaseio.com/Conversations/");
mFirebasePostRef = new Firebase("https://<id>.firebaseio.com/Requests/");
unresolvedAdapter = new FirebaseListAdapter<PostRequest>(getActivity(),PostRequest.class,
R.layout.group_item_unresolved, unresolvedQuery) {
@Override
protected void populateView(View view, PostRequest postRequest, int i) {
((TextView)view.findViewById(R.id.request_history_text))
.setText(postRequest.getRequest());
}
};
unresolvedList.setAdapter(unresolvedAdapter);
}
@Override
public void onDestroyView() {
super.onDestroyView();
}
}
Conversations:{
convoID1:{
postId:"requestID1"
user1:"me"
user2:"you"
}
convoID2:{
postId:"requestID1"
user1:"me"
user2: "someone else"
}
convoID3:{ ... }
}
Messages:{
convoID1:{ ...messages}
convoID2:{ ...messages}
}
Requests:{
requestID1: {
request:
details:
requester:
timestamp:
}
requestID2: {...}
requestID3: {...}
}