Question

我正在尝试将用户身份验证添加到我的应用中，但我不明白为什么我无法通过FirebaseRecyclerAdapter中的ref访问特定用户。

waypointsUrl = Constants.FIREBASE_URL + "/users/" + mUserId + "/";
            final Firebase userRef = new Firebase(waypointsUrl);

致命的例外：主要处理：com.example.rasmusjosefsson.rjcar，PID：7797 com.firebase.client.FirebaseException：无法跳转到键入在com.firebase.client.DataSnapshot.getValue（DataSnapshot.java:185）在 com.firebase.ui.FirebaseRecyclerAdapter.parseSnapshot（FirebaseRecyclerAdapter.java:161）在 com.firebase.ui.FirebaseRecyclerAdapter.getItem（FirebaseRecyclerAdapter.java:150）在 com.firebase.ui.FirebaseRecyclerAdapter.onBindViewHolder（FirebaseRecyclerAdapter.java:190）在 android.support.v7.widget.RecyclerView $ Adapter.onBindViewHolder（RecyclerView.java:5471）在 android.support.v7.widget.RecyclerView $ Adapter.bindViewHolder（RecyclerView.java:5504）在 android.support.v7.widget.RecyclerView $ Recycler.getViewForPosition（RecyclerView.java:4741）在 android.support.v7.widget.RecyclerView $ Recycler.getViewForPosition（RecyclerView.java:4617）在 android.support.v7.widget.LinearLayoutManager $ LayoutState.next（LinearLayoutManager.java:1994）在 android.support.v7.widget.LinearLayoutManager.layoutChunk（LinearLayoutManager.java:1390）在 android.support.v7.widget.LinearLayoutManager.fill（LinearLayoutManager.java:1353）在 android.support.v7.widget.LinearLayoutManager.onLayoutChildren（LinearLayoutManager.java:574）在 android.support.v7.widget.RecyclerView.dispatchLayoutStep2（RecyclerView.java:3028）在 android.support.v7.widget.RecyclerView.dispatchLayout（RecyclerView.java:2906）在 android.support.v7.widget.RecyclerView.onLayout（RecyclerView.java:3283）在android.view.View.layout（View.java:16630）在android.view.ViewGroup.layout（ViewGroup.java:5437）在 android.support.design.widget.HeaderScrollingViewBehavior.layoutChild（HeaderScrollingViewBehavior.java:122）在 android.support.design.widget.ViewOffsetBehavior.onLayoutChild（ViewOffsetBehavior.java:42）在 android.support.design.widget.AppBarLayout $ ScrollingViewBehavior.onLayoutChild（AppBarLayout.java:1170）在 android.support.design.widget.CoordinatorLayout.onLayout（CoordinatorLayout.java:814）在android.view.View.layout（View.java:16630）在android.view.ViewGroup.layout（ViewGroup.java:5437）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:336）在android.widget.FrameLayout.onLayout（FrameLayout.java:273）在android.view.View.layout（View.java:16630）在android.view.ViewGroup.layout（ViewGroup.java:5437）在android.widget.LinearLayout.setChildFrame（LinearLayout.java:1743）在android.widget.LinearLayout.layoutVertical（LinearLayout.java:1586）在android.widget.LinearLayout.onLayout（LinearLayout.java:1495）在android.view.View.layout（View.java:16630）在android.view.ViewGroup.layout（ViewGroup.java:5437）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:336）在android.widget.FrameLayout.onLayout（FrameLayout.java:273）在android.view.View.layout（View.java:16630）在android.view.ViewGroup.layout（ViewGroup.java:5437）在android.widget.LinearLayout.setChildFrame（LinearLayout.java:1743）在android.widget.LinearLayout.layoutVertical（LinearLayout.java:1586）在android.widget.LinearLayout.onLayout（LinearLayout.java:1495）在android.view.View.layout（View.java:16630）在android.view.ViewGroup.layout（ViewGroup.java:5437）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:336）在android.widget.FrameLayout.onLayout（FrameLayout.java:273）在 com.android.internal.policy.PhoneWindow $ DecorView.onLayout（PhoneWindow.java:2678）在android.view.View.layout（View.java:16630）在android.view.ViewGroup.layout（ViewGroup.java:5437）在android.view.ViewRootImpl.performLayout（ViewRootImpl.java:2171）在android.view.ViewRootImpl.performTraversals（ViewRootImpl.java:1931）在android.view.ViewRootImpl.doTraversal（ViewRootImpl.java:1107）在 android.view.ViewRootImpl $ TraversalRunnable.run（ViewRootImpl.java:6013）在 android.view.Choreographer $ CallbackRecord.run（Choreographer.java:858）在android.view.Choreographer.doCallbacks（Choreographer.java:670）在android.view.Choreographer.doFrame（Choreographer.java:606）在 android.view.Choreographer $ FrameDisplayEventReceiver.run（Choreographer.java:844）在android.os.Ha

我的JSON结构。还想知道它是否可以使用＆＃34;添加日期：2016-05-05 03：50：02＆＃34; ：作为关键？

{
  "users" : {
    "0057242b-81e2-4f97-bca7-b671212614ba" : {
      "email" : "kalle@hotmail.se",
      "waypoints" : {
        "Date added: 2016-05-05 03:50:02" : {
          "-KH-eHHxVpf--IcnYgIq" : {
            "latitude" : 123,
            "longitude" : 123
          },
          "-KH-eK6z9vIefgcI5Pq2" : {
            "latitude" : 123,
            "longitude" : 123
          },
          "-KH-eMIl8zB_Yq67SY69" : {
            "latitude" : 123,
            "longitude" : 123
          }
        }
      }
    },
    "1a96a633-7e67-41b8-9aa7-c70d4b7eb59c" : {
      "email" : "josefssons@hotmail.se",
      "waypoints" : {
        "Date added: 2016-05-05 03:46:21" : {
          "-KH-bcrZwOR2c3Ouc-hv" : {
            "latitude" : 123,
            "longitude" : 123
          },
          "-KH-bhdzAatR84pcX1_h" : {
            "latitude" : 123,
            "longitude" : 123
          },
          "-KH-dz0jw_UTsG2ojFJM" : {
            "latitude" : 123,
            "longitude" : 123
          },
          "-KH-e0qLa2fY1fsFpiTS" : {
            "latitude" : 123,
            "longitude" : 123
          }
        },
        "Date added: 2016-05-05 03:51:09" : {
          "-KH-eXXo5OGSG7GIisMf" : {
            "latitude" : 123,
            "longitude" : 123
          },
          "-KH-eZPi1spUbFUwkmfh" : {
            "latitude" : 123,
            "longitude" : 123
          },
          "-KH-eZSt613mKv1cJyox" : {
            "latitude" : 123,
            "longitude" : 123
          }
        },

我猜这里错了，我没看到。

@JsonIgnoreProperties(ignoreUnknown = true)
public class MyLatLngBack2 {

    @JsonProperty("email")
    private String email;

    @JsonProperty("waypoints")
    private TreeMap<String, Waypoints> waypoints;

    public MyLatLngBack2(String email, TreeMap<String, WaypointsBack2> waypoints) {
        this.email = email;
        this.waypoints = waypoints;
    }

    public MyLatLngBack2() {}

    public String getEmail() {
        return email;
    }

    public TreeMap<String, WaypointsBack2> getWaypoints() {
        return waypoints;
    }

    public void setWaypoints(TreeMap<String, WaypointsBack2> waypoints) {
        this.waypoints = waypoints;
    }
}

航路点数据

@JsonIgnoreProperties(ignoreUnknown = true)
public class WaypointsBack2 {

    @JsonProperty("longitude")
    private double longitude;

    @JsonProperty("latitude")
    private double latitude;

    public WaypointsBack2(double latitude, double longitude) {
        this.latitude = latitude;
        this.longitude = longitude;
    }

    public WaypointsBack2() {
    }


    public double getLongitude() {
        return longitude;
    }

    public double getLatitude() {
        return latitude;
    }

}

以下是代码的其余部分

 mRef = new Firebase(Constants.FIREBASE_URL);
            if (mRef.getAuth() == null) {
                loadLoginView();
            }


            try {
                mUserId = mRef.getAuth().getUid();
            } catch (Exception e) {
                loadLoginView();
            }


            mRecyclerView = (RecyclerView) findViewById(R.id.card_recycler_view);
            mRecyclerView.setHasFixedSize(false);
            LinearLayoutManager manager = new LinearLayoutManager(this);
            manager.setReverseLayout(false);
            mRecyclerView.setLayoutManager(manager);



            // https://todoapprj.firebaseio.com/users/1a96a633-7e67-41b8-9aa7-c70d4b7eb59c
            waypointsUrl = Constants.FIREBASE_URL + "/users/" + mUserId + "/";
            final Firebase userRef = new Firebase(waypointsUrl);



            //  (LatLngViewHolder.class, userRef) gives me bounce to blaha
            mRecycleViewAdapter = new FirebaseRecyclerAdapter<MyLatLngBack2, LatLngViewHolder>(MyLatLngBack2.class, R.layout.list_item, LatLngViewHolder.class, mRef) {
                @Override
                public void populateViewHolder(LatLngViewHolder latLngViewHolder, MyLatLngBack2 myLatLng, int position) {

                    // gets me the root email (wrong one)
                    String email =  myLatLng.getEmail();
                    }
            };

            mRecyclerView.setAdapter(mRecycleViewAdapter);
        }

Answer 1

我找到了一个未能反弹的解决方案，我确实将MyLatLng POJO更改为以下内容：

@JsonIgnoreProperties(ignoreUnknown = true)
public class LatLngsModel {
    public Map<String, Map <String, MyWaypoint>>  latLngs;

    public LatLngsModel() {
    }

    public LatLngsModel(Map<String, Map <String, MyWaypoint>>  myLatLngs) {
        this.latLngs = myLatLngs;
    }

    public Map<String, Map <String, MyWaypoint>> getMyWaypoints() {
        return latLngs;
    }
}

Firebase - 用户身份验证，我的userRef无法正常工作

1 个答案: