android - 在 Android 中使用 Firebase 在 RecyclerView 上获取 onClickListener

Question

我已经在我的 Activity 中使用 Firebase RecyclerAdapter 实现了 RecyclerView 并希望实现 onClickListener 虽然我已经尝试实现这一点但是我猜我的代码中有些地方不对，请帮我找出问题所在。我已经搜索了另一个问题，但没有得到理解，也找不到解决问题的方法。

我正在使用 Android Studio

firebase 适配器类文件:

public class HomePage extends AppCompatActivity {

 @Override
    public void onStart() {
        super.onStart();
        FirebaseUser currentUser = mAuth.getCurrentUser();
        if (currentUser == null) {
            sentToStart();
        }

    FirebaseRecyclerAdapter<post, postViewHolder> firebaseRecyclerAdapter = new FirebaseRecyclerAdapter<post, postViewHolder>(

            post.class,
            R.layout.post_row_recycle_home,
            postViewHolder.class,
            mDatabaseReference
    ) {
        @Override
        protected void populateViewHolder(postViewHolder viewHolder, post model, int position) {
            viewHolder.setwebViewPost(model.getWebViewPost());
        }
    };
    mrecyclerView.setAdapter(firebaseRecyclerAdapter);

}


public static class postViewHolder extends RecyclerViewPager.ViewHolder {
    View mView;

    public postViewHolder(View itemView) {
        super(itemView);
        mView = itemView;
        mView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mClickListener.onItemClick(v, getAdapterPosition());
            }
        });
    }

    private postViewHolder.ClickListener mClickListener;

    public interface ClickListener {
        public void onItemClick(View view, int position);
    }

    public void setOnClickListener(postViewHolder.ClickListener clickListener) {
        mClickListener = clickListener;
    }

    public void setwebViewPost(String webViewPost) {
        WebView webView = (WebView) mView.findViewById(R.id.webView_news);
        webView.loadUrl(webViewPost);
    }

}

@Override
public postViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    postViewHolder viewHolder = super.onCreateViewHolder(parent, viewType);
    viewHolder.setOnClickListener(new postViewHolder().ClickListener() {
        @Override
        public void onItemClick (View view,int position){
            Toast.makeText(this, "Item clicked at " + position, Toast.LENGTH_SHORT).show();
        }

    });
    return viewHolder;
}

Answer 1

将 onClickListener 移到 onBindViewHolder 中。

@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
    holder.itemView.setOnClickListener(new postViewHolder().ClickListener() {
        @Override
        public void onItemClick (View view,int position){
            Toast.makeText(this, "Item clicked at " + position, Toast.LENGTH_SHORT).show();
        }

    });
}

编辑:

删除接口(interface)，因为它是多余的。您正在将值从 viewholder 传递到 onCreateViewHolder，这是不必要的。而是处理 viewholder 内部的点击。检查更新的类。

public class HomePage extends AppCompatActivity {

@Override
public void onStart() {
    super.onStart();
    FirebaseUser currentUser = mAuth.getCurrentUser();
    if (currentUser == null) {
        sentToStart();
    }

    FirebaseRecyclerAdapter<post, postViewHolder> firebaseRecyclerAdapter = new FirebaseRecyclerAdapter<post, postViewHolder>(post.class, R.layout.post_row_recycle_home, postViewHolder.class, mDatabaseReference) {
        @Override
        protected void populateViewHolder(postViewHolder viewHolder, post model, int position) {
            viewHolder.setwebViewPost(model.getWebViewPost());
        }
    };
    mrecyclerView.setAdapter(firebaseRecyclerAdapter);

}

public static class postViewHolder extends RecyclerViewPager.ViewHolder {
    View mView;

    public postViewHolder(View itemView) {
        super(itemView);
        itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                //Show the webViewPost Here
            }
        });
    }

    public void setwebViewPost(String webViewPost) {
        WebView webView = (WebView) mView.findViewById(R.id.webView_news);
        webView.loadUrl(webViewPost);
    }

}

@Override
public postViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    postViewHolder viewHolder = super.onCreateViewHolder(parent, viewType);
    return viewHolder;
  }
}