java - 在滚动Recycleview中实现onclick

Question

我有设置为自动滚动的recycleview。我希望实现 onclicklistener 以便打开新 Activity 。

这是我的回收 View

final int duration = 10;
final int pixelsToMove = 30;
private final Handler mHandler = new Handler(Looper.getMainLooper());
private final Runnable SCROLLING_RUNNABLE = new Runnable() {

    @Override
    public void run() {
            top.smoothScrollBy(pixelsToMove, 0);
            mHandler.postDelayed(this, duration);
        }
};


@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View view = inflater.inflate(R.layout.fragment_home, container, false);

    top = (RecyclerView) view.findViewById(R.id.top);

    final LinearLayoutManager llm = new LinearLayoutManager(getActivity(),LinearLayoutManager.HORIZONTAL,false);
    top.setLayoutManager(llm);
    top.setHasFixedSize(true);
    staggeredBooksAdapter = new TopAdapter(this, bookslist);

    top.setAdapter(staggeredBooksAdapter);

    //Recycleview
    top.addOnScrollListener(new RecyclerView.OnScrollListener() {
        @Override
        public void onScrollStateChanged(@NonNull RecyclerView recyclerView, int newState) {
        super.onScrollStateChanged(recyclerView, newState); }

        @Override public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {
            super.onScrolled(recyclerView, dx, dy);
            int lastItem = llm.findLastCompletelyVisibleItemPosition();
            if(lastItem == llm.getItemCount()-1){
                mHandler.removeCallbacks(SCROLLING_RUNNABLE);
                Handler postHandler = new Handler();
                postHandler.postDelayed(new Runnable() {
                    @Override
                    public void run() {
                            top.setAdapter(null);
                            top.setAdapter(staggeredBooksAdapter);
                            mHandler.postDelayed(SCROLLING_RUNNABLE, 6000);
                        }}, 6000);
                    }
                }
            });
            mHandler.postDelayed(SCROLLING_RUNNABLE, 6000);

我的适配器类是

public class TopAdapter extends RecyclerView.Adapter<TopAdapter.MyViewHolder> {
    ArrayList<location> bookslist;
    CardView cv;
    location g;
    private Home context;


    public TopAdapter(Home context, ArrayList<location> bookslist){
            this.bookslist = bookslist;
            this.context = context; // add this as a field in your adapter class.
        }

        @Override
        public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.layout_top,parent,false);
            return new MyViewHolder(v);
        }

        public class MyViewHolder extends RecyclerView.ViewHolder {
            TextView teacher_name,teacher_location;
            LinearLayout profile_details;
            ImageView iv;

            MyViewHolder(final View itemView) {
                super(itemView);
                cv = (CardView)  itemView.findViewById(R.id.teacher_name);
                teacher_location = (TextView) 
            }
        }

        @Override
        public void onBindViewHolder(final MyViewHolder holder, final int position) {

            database = FirebaseDatabase.getInstance();

            g = bookslist.get(position);

            holder.teacher_name.setText(g.getSellername());

            holder.profile_details.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    g = bookslist.get(position);
                    Intent intent = new Intent(v.getContext(), gender_details.class);

                    intent.putExtra(KEY_NAME, g.getSellername());
                    v.getContext().startActivity(intent);
                }
            });


        @Override
        public int getItemCount() {
            return bookslist.size();
        }
    }

当我重复单击时，我可以根据位置打开包含详细信息的新 Activity ，但我不知道它是如何发生的，并且只有在重复单击某个项目后才能重现相同的效果。但这种情况并不经常发生。我正在寻找永久解决方案，当我单击回收 View 列表中的任何项目时打开新 Activity 。

提前致谢。

Answer 1

您的 onClickListener 设置为名为 profile_details 的 View ，并且仅当您点击(确切地说)此 View 时才会触发它。您的某些元素可能会与此 View 重叠，因此您的点击不起作用。它解释了在项目的不同部分进行随机次数的点击后您的 startActivity 触发了什么。

尝试调试 View 上的点击并将此 onItemClickListener 设置为适当的 View/ViewGroup

附:另外，我的建议是不要在适配器内存储任何与数据库相关的对象(这违反了单一责任)。

将 Activity 启动逻辑存储在适配器中也是不好的做法。请参阅这个答案:Can't resolve the Context or Application while navigating from Adapter of a fragment(A) to another Fragment (B)

希望对你有帮助:)