RecyclerView 滚动到最后一个项目时崩溃。

huangapple
未分类评论45阅读模式
英文:

RecyclerView crashes when scrolling to the last Item

问题

public class HomeFragment extends Fragment {

    private RecyclerView recyclerView;

    FirebaseRecyclerAdapter<Agent, AgentHolder> firebaseRecyclerAdapter;

    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        final View view = inflater.inflate(R.layout.home_fragment, container, false);
        recyclerView = (RecyclerView) view.findViewById(R.id.recyclerview);
        recyclerView.setHasFixedSize(true);

        recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
        ViewCompat.setNestedScrollingEnabled(recyclerView, false);

        FirebaseRecyclerOptions<Agent> options = new FirebaseRecyclerOptions.Builder<Agent>()
                .setQuery(FirebaseDatabase.getInstance().getReference().child("Buy"), Agent.class)
                .build();

        firebaseRecyclerAdapter = new FirebaseRecyclerAdapter<Agent, AgentHolder>(options) {
            @Override
            protected void onBindViewHolder(@NonNull AgentHolder holder, int position, @NonNull Agent model) {
                holder.setCity(model.getCity());
                holder.setTown(model.getTown());
                holder.setImage(holder.mView.getContext(), model.getImage());
            }

            @NonNull
            @Override
            public AgentHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
                View view1 = LayoutInflater.from(parent.getContext()).inflate(R.layout.individual_row, parent,
                        false);
                return new AgentHolder(view1);
            }
        };

        recyclerView.setAdapter(firebaseRecyclerAdapter);

        return view;
    }

    @Override
    public void onResume() {
        super.onResume();
        firebaseRecyclerAdapter.startListening();
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        firebaseRecyclerAdapter.stopListening();
    }
}

(Note: The above code is a direct translation of the provided Java code and XML references. If there are any variable or resource names that need translation or specific adaptation, please make the necessary adjustments.)

英文:

My recyclerView is loading images and text from the firebase Realtime Database without any problems and I can scroll it fast or slow but when I get to the last item it's crashing. What could be the problem?

Bellow is my logcat

2020-04-09 20:05:05.404 24971-24971/com.example.realestatemw E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.realestatemw, PID: 24971
com.google.firebase.database.DatabaseException: Can't convert object of type java.lang.String to type com.example.realestatemw.Agent
at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.convertBean(com.google.firebase:firebase-database@@19.2.1:435)
at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.deserializeToClass(com.google.firebase:firebase-database@@19.2.1:231)
at com.google.firebase.database.core.utilities.encoding.CustomClassMapper.convertToCustomClass(com.google.firebase:firebase-database@@19.2.1:79)
at com.google.firebase.database.DataSnapshot.getValue(com.google.firebase:firebase-database@@19.2.1:203)
at com.firebase.ui.database.ClassSnapshotParser.parseSnapshot(ClassSnapshotParser.java:29)
at com.firebase.ui.database.ClassSnapshotParser.parseSnapshot(ClassSnapshotParser.java:15)
at com.firebase.ui.common.BaseCachingSnapshotParser.parseSnapshot(BaseCachingSnapshotParser.java:36)
at com.firebase.ui.common.BaseObservableSnapshotArray.get(BaseObservableSnapshotArray.java:52)
at com.firebase.ui.database.FirebaseRecyclerAdapter.getItem(FirebaseRecyclerAdapter.java:109)
at com.firebase.ui.database.FirebaseRecyclerAdapter.onBindViewHolder(FirebaseRecyclerAdapter.java:149)
at androidx.recyclerview.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:7065)
at androidx.recyclerview.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:7107)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:6012)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:6279)
at androidx.recyclerview.widget.GapWorker.prefetchPositionWithDeadline(GapWorker.java:288)
at androidx.recyclerview.widget.GapWorker.flushTaskWithDeadline(GapWorker.java:345)
at androidx.recyclerview.widget.GapWorker.flushTasksWithDeadline(GapWorker.java:361)
at androidx.recyclerview.widget.GapWorker.prefetch(GapWorker.java:368)
at androidx.recyclerview.widget.GapWorker.run(GapWorker.java:399)
at android.os.Handler.handleCallback(Handler.java:836)
at android.os.Handler.dispatchMessage(Handler.java:103)
at android.os.Looper.loop(Looper.java:203)
at android.app.ActivityThread.main(ActivityThread.java:6368)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1063)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:924)
2020-04-09 20:05:05.458 1176-1281/? E/PROXIMITY: ProximitySensor: unknown event (type=3, code=0)
2020-04-09 20:05:05.526 1728-1793/? E/MFI-Conn: ( mdfx_conn_conn, 76) mdfx_conn_conn(): the MFI connection fails!!
2020-04-09 20:05:05.526 1728-1793/? E/MFI-Conn: ( mdfx_conn_init_legacy, 363) mdfx_conn_init_legacy(): mdfx_conn_conn() error!!
2020-04-09 20:05:05.526 1728-1793/? E/MFI-RDS: ( rds_mal_conn_init, 819) [RDS][rds_mal_conn_init] mdfx_conn_init_legacy gets NULLLLLLL!!!!!
2020-04-09 20:05:05.709 1176-1281/? E/PROXIMITY: ProximitySensor: unknown event (type=3, code=0)
2020-04-09 20:05:06.529 1728-1793/? E/MFI-Conn: ( mdfx_conn_conn, 76) mdfx_conn_conn(): the MFI connection fails!!
2020-04-09 20:05:06.529 1728-1793/? E/MFI-Conn: ( mdfx_conn_init_legacy, 363) mdfx_conn_init_legacy(): mdfx_conn_conn() error!!
2020-04-09 20:05:06.529 1728-1793/? E/MFI-RDS: ( rds_mal_conn_init, 819) [RDS][rds_mal_conn_init] mdfx_conn_init_legacy gets NULLLLLLL!!!!!
2020-04-09 20:05:06.680 23860-23898/? E/StreamController: Different sized entryTreeNode vs restored controllers: 10, 5
2020-04-09 20:05:06.969 1176-1281/? E/PROXIMITY: ProximitySensor: unknown event (type=3, code=0)
2020-04-09 20:05:07.218 1176-1281/? E/PROXIMITY: ProximitySensor: unknown event (type=3, code=0)
2020-04-09 20:05:07.532 1728-1793/? E/MFI-Conn: ( mdfx_conn_conn, 76) mdfx_conn_conn(): the MFI connection fails!!
2020-04-09 20:05:07.532 1728-1793/? E/MFI-Conn: ( mdfx_conn_init_legacy, 363) mdfx_conn_init_legacy(): mdfx_conn_conn() error!!
2020-04-09 20:05:07.533 1728-1793/? E/MFI-RDS: ( rds_mal_conn_init, 819) [RDS][rds_mal_conn_init] mdfx_conn_init_legacy gets NULLLLLLL!!!!!
2020-04-09 20:05:07.719 1176-1281/? E/PROXIMITY: ProximitySensor: unknown event (type=3, code=0)
2020-04-09 20:05:07.969 1176-1281/? E/PROXIMITY: ProximitySensor: unknown event (type=3, code=0)
2020-04-09 20:05:08.219 1176-1281/? E/PROXIMITY: ProximitySensor: unknown event (type=3, code=0)
2020-04-09 20:05:08.469 1176-1281/? E/PROXIMITY: ProximitySensor: unknown event (type=3, code=0)

Below is my code

public class HomeFragment extends Fragment {

private RecyclerView recyclerView;


FirebaseRecyclerAdapter&lt;Agent, AgentHolder&gt; firebaseRecyclerAdapter;

public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    final View view = inflater.inflate(R.layout.home_fragment, container, false);
    //1. get a reference to recyclerView
    recyclerView = (RecyclerView) view.findViewById(R.id.recyclerview);
    recyclerView.setHasFixedSize(true);
    
    // 2. set layoutManger
    recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
    ViewCompat.setNestedScrollingEnabled(recyclerView,false);


    FirebaseRecyclerOptions&lt;Agent&gt; options = new FirebaseRecyclerOptions.Builder&lt;Agent&gt;()
            .setQuery(FirebaseDatabase.getInstance().getReference().child(&quot;Buy&quot;), Agent.class)
            .build();


    firebaseRecyclerAdapter = new FirebaseRecyclerAdapter&lt;Agent, AgentHolder&gt;(options) {
        @Override
        protected void onBindViewHolder(@NonNull AgentHolder holder, int position, @NonNull Agent model) {
            holder.setCity(model.getCity());
            holder.setTown(model.getTown());
            holder.setImage(holder.mView.getContext(), model.getImage());

        }

        @NonNull
        @Override
        public AgentHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {

            View view1 = LayoutInflater.from(parent.getContext()).inflate(R.layout.individual_row, parent,
                    false);

            return new AgentHolder(view1);
        }
    };


    recyclerView.setAdapter(firebaseRecyclerAdapter);

    return view;

}




@Override
public void onResume() {
    super.onResume();

        firebaseRecyclerAdapter.startListening();
    }

@Override
public void onDestroy() {
    super.onDestroy();
    firebaseRecyclerAdapter.stopListening();
}

}

huangapple
  • 本文由 发表于 2020年4月9日 08:32:34
  • 转载请务必保留本文链接：https://java.coder-hub.com/61112149.html
匿名

发表评论

匿名网友

:?: :razz: :sad: :evil: :!: :smile: :oops: :grin: :eek: :shock: :???: :cool: :lol: :mad: :twisted: :roll: :wink: :idea: :arrow: :neutral: :cry: :mrgreen:

确定