未输入 ViewHolder 中的 OnClickListener

Question

我有一个回收站视图，显示用户在我的应用程序中创建的所有 post。我希望用户能够单击其中一个 post 并被带到一个新片段，在那里他们只能看到他们选择的 post。

当我运行我的代码并单击其中一个 post 时，甚至都没有触发 OnCLickListener。

我尝试在 public void OnClick 上添加断点，但它从未被触发。我已经尝试将 OnClick 添加到 onBindViewHolder，但我知道这不是一个好主意。

public class PostAdapter extends RecyclerView.Adapter<PostAdapter.PostViewHolder> {
public List<Post> postList;
private Context context;
private static OnItemClickListener onItemClickListener;

public PostAdapter(){
}

public interface OnItemClickListener{
    void onItemClick(View v, int position);
}

public void updateList(List<Post> list){
    postList = list;
    notifyDataSetChanged();
}

public static class PostViewHolder extends RecyclerView.ViewHolder{
    TextView postName, postUsername, postDate, postTime, postContent, postId;

    PostViewHolder(View v) {
        super(v);
        this.postName = (TextView) itemView.findViewById(R.id.name);
        this.postUsername = (TextView) itemView.findViewById(R.id.username);
        this.postDate = (TextView) itemView.findViewById(R.id.date);
        this.postTime = (TextView) itemView.findViewById(R.id.time);
        this.postContent = (TextView) itemView.findViewById(R.id.content);
        this.postId = (TextView) itemView.findViewById(R.id.postId);
        v.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int position = PostViewHolder.super.getAdapterPosition();
                onItemClickListener.onItemClick(v, position);
                System.out.println("doesn't even make it here");

            }
        });
    }
}

public PostAdapter(List<Post> postList, Context context){
    this.postList = postList;
    this.context = context;
}

@Override
public PostAdapter.PostViewHolder onCreateViewHolder(ViewGroup parent, int viewType){
    View view = LayoutInflater.from(context).inflate(R.layout.all_posts_layout, parent, false);
    return new PostAdapter.PostViewHolder(view);
}

@Override
public void onBindViewHolder(PostViewHolder holder, int position){
    Post post = postList.get(position);
    holder.postUsername.setText(String.valueOf(post.getUsername()));
    holder.postName.setText(String.valueOf(post.getName()));
    holder.postDate.setText(String.valueOf(post.getDate()));
    holder.postTime.setText(String.valueOf(post.getTime()));
}

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

非常感谢任何帮助！

<---card layout for each individual post---->

    <LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="130dp"
        android:orientation="vertical">

        <ScrollView
            android:layout_width="wrap_content"
            android:layout_height="130dp">

        <android.support.v7.widget.CardView
            android:id="@+id/card_view"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:layout_marginLeft="16dp"
            android:layout_marginTop="16dp"
            android:layout_marginRight="16dp"
            android:layout_marginBottom="2dp"
            android:elevation="60dp">


            <RelativeLayout
                android:id="@+id/search_term_layout"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:padding="1dp">

                <TextView
                    android:id="@+id/name"
                    android:layout_width="wrap_content"
                    android:textStyle="bold"
                    android:layout_height="wrap_content"
                    android:text="Name"
                    android:textSize="20sp" />

                <TextView
                    android:id="@+id/username"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:textStyle="italic"
                    android:layout_marginLeft="10dp"
                    android:layout_toRightOf="@id/name"
                    android:text="Username"
                    android:textSize="18sp" />

                <TextView
                    android:id="@+id/date"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_below="@+id/content"
                    android:layout_alignParentEnd="true"
                    android:layout_marginEnd="56dp"
                    android:text="Date"
                    android:textSize="10sp" />

                <TextView
                    android:id="@+id/time"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_alignBaseline="@+id/username"
                    android:layout_toRightOf="@+id/username"
                    android:layout_alignParentEnd="true"
                    android:paddingLeft="8dp"
                    android:text="Time"
                    android:textSize="10sp" />

                <TextView
                    android:id="@+id/content"
                    android:layout_width="315dp"
                    android:layout_height="48dp"
                    android:layout_below="@+id/name"
                    android:layout_alignStart="@+id/name"
                    android:text="Content"
                    android:textSize="18sp" />

                <TextView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:id="@+id/postId"
                    android:text="ID"
                    android:layout_below="@id/content"
                    />

            </RelativeLayout>
        </android.support.v7.widget.CardView>
        </ScrollView>
    </LinearLayout>

<---回收站视图显示所有 posts------>


    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        xmlns:tools="http://schemas.android.com/tools">

            <Button
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/filterBtn"
                android:text="Filter"
                android:background="@drawable/button"
                android:layout_margin="2dp"
                android:textColor="@color/common_google_signin_btn_text_dark_default"/>

            <android.support.v7.widget.RecyclerView
                android:id="@+id/update_post_view"
                android:layout_width="match_parent"
                android:layout_marginTop="50dp"
                android:padding="10dp"
                android:layout_height="match_parent" />
    </RelativeLayout>

Answer 1

您需要在该视图的 onCreateViewHolder 中进行设置。也在构造函数中初始化它。

Answer 2

据此更新代码

public static class PostViewHolder extends RecyclerView.ViewHolder, View.OnClickListener {
    TextView postName, postUsername, postDate, postTime, postContent, postId;

    PostViewHolder(View v) {
        super(v);

        //init view
        v.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        onItemClickListener.onItemClick(v, getAdapterPosition());
    }
}

Answer 3

**=> You just need to change onBindViewHolder() method code
=> Add click listener on this method.
=> Your code should be like this.**

@Override
public void onBindViewHolder(PostViewHolder holder, int position){
    Post post = postList.get(position);
    holder.postUsername.setText(String.valueOf(post.getUsername()));
    holder.postName.setText(String.valueOf(post.getName()));
    holder.postDate.setText(String.valueOf(post.getDate()));
    holder.postTime.setText(String.valueOf(post.getTime()));

 holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int position = PostViewHolder.super.getAdapterPosition();
                onItemClickListener.onItemClick(v, position);
                System.out.println("doesn't even make it here");

            }
        });
}

Answer 4

您的 ScrollView 似乎消耗了点击事件。尝试将其删除或替换为 NestedScrollView

未输入 ViewHolder 中的 OnClickListener

OnClickListener in ViewHolder not being entered

java

android

android-recyclerview

onclicklistener

android-viewholder