将点击侦听器附加到回收器视图项的每个组件[重复]

Question

我正在学习 Android 开发。自 24 小时以来一直在努力解决此问题，需要帮助。

在我的每个回收视图项目中，我有两个视图 ePaper 和网站。我想在整个项目、电子纸视图和网站视图上附加不同的点击监听器

在上图中，我需要放置 3 个点击监听器 1.点击红色块1 - 做X（意图另一个活动） 2. 点击红色方块 2 - 做 Y (Intent to another activity) 3. 点击绿色方块，整个项目视图 - do Z (Dialog)

尝试了许多解决方案。但是，当我点击红色块时，除了红色块中的侦听器之外，绿色块中的侦听器也会起作用。

在 MainActivity 中

recyclerView.addOnItemTouchListener(new RecyclerTouchListener(getApplicationContext(),
            recyclerView, new ClickListener() {
        String userid = Utils.getUserId(getApplicationContext());
        @Override
        public void onClick(View view, final int position) {
            // Set listeners here for complete card view
            final NewsPapersDataModel currentPaper = newsPapersList.get(position);
            Log.d("TAG","Clicked 1");

                newsSelectionDialog(currentPaper.getEpaper(),currentPaper.getWebsite());
        }
        @Override
        public void onLongClick(View view, int position) {
            Toast.makeText(MainActivity.this, "Long press on position :" + position, Toast.LENGTH_LONG).show();
        }
    }));

在 NewsPaperAdapter 中

    public void onBindViewHolder(@NonNull final CustomViewHolder holder, int position) {
    //  Log.d("TAG","Holder is "+newsList);

    final NewsPapersDataModel currentItem = newsList.get(position);
    final String ePaperUrl = currentItem.getEpaper();
    final String webSiteUrl = currentItem.getWebsite();
    final String paperName = currentItem.getName();

    holder.paperNameView.setText(newsList.get(position).getName());

    if (TextUtils.isEmpty(currentItem.getEpaper())) {
        //  Log.d("TAGG","ePaper - "+currentItem.getEpaper()+" Website - "+currentItem.getWebsite());
        holder.ePaperView.setVisibility(View.GONE);

    } else if (TextUtils.isEmpty(currentItem.getWebsite())) {
        holder.websiteView.setVisibility(View.GONE);

    }

    holder.ePaperView.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View view) {

            saveLinksToDb(userid, "ePaper", ePaperUrl);
            Intent intent = new Intent(context, NewsAdvancedWebViewActivity.class);
            intent.putExtra("url", ePaperUrl);
            context.startActivity(intent);

        }
    });

    holder.websiteView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            saveLinksToDb(userid, "Website", webSiteUrl);
            Intent intent = new Intent(context, NewsAdvancedWebViewActivity.class);
            intent.putExtra("url", webSiteUrl);
            intent.putExtra("paperName",paperName);
            context.startActivity(intent);

        }
    });

}

请帮帮我。

Answer 1

您需要在您的适配器中为点击监听器创建一个接口，并为您想要的每个项目添加 onclick 方法。

请查看下面的代码。

在你的适配器中，创建接口

public interface OnClickListener {
    void onPaperViewClick(View view, int position);
    void onWebsiteViewClick(View view, int position);
}

并创建方法来从活动中设置点击监听器

public void setOnClickListener(OnClickListener listener) {
    this.onClickListener= listener;
}

在你的 onBindViewHolder 方法中，

holder.ePaperView.setOnClickListener(new View.OnClickListener() {

    @Override
    public void onClick(View view) {

        onClickListener.onPaperViewClick(view, position);
});

holder.websiteView.setOnClickListener(new View.OnClickListener() {

    @Override
    public void onClick(View view) {

        onClickListener.onWebsiteViewClick(view, position);
});

最后，在你的活动中，设置

recyclerViewAdapter.setOnClickListener(new NewsPaperAdapter.OnClickListener(){
    @override
    void onPaperViewClick(View view, int position){
         // code to handle paper click
    }

    @override
    void onPaperViewClick(View view, int position){
        // code to handle website click
    }
};

Answer 2

从 MainActivity 中删除您的 TouchListener 并在您的适配器中添加 ClickListener/ LonCkickListener。

onBindViewHolder(){
    //rest of your code

    holder.itemView.setOnClickListener(new OnClickListener{
        @Override
        public void onClick(View view) {
           // Click implementation here
        }
        @Override
        public void onLongClick(View view) {
           // Long click implementation here
        }

    })
}

在你的CustomViewHolder：

public class CustomViewHolder extends RecyclerView.ViewHolder{
    // Other fields

    View itemView;
    public CustomViewHolder(View view){
    // rest of initialization

    itemView = view;
    }
}

EDIT（OP 想要在 Activity 中处理应用程序逻辑）

创建一个名为RecyclerViewActionListener的接口类：

public interface RecyclerViewActionListener {
    void onViewClicked(int clickedViewId, int clickedItemPosition);
    void onViewLongClicked(int clickedViewId, int clickedItemPosition);
}

然后修改您的RecyclerViewAdpater 以在构造函数中添加一个附加字段。当我们创建适配器时，我们会将监听器从 Activity 传递给这个适配器：

public class RecyclerViewAdpater extends RecyclerView.Adapter<RecyclerViewAdpater.CustomViewHolder>{

    private RecyclerViewActionListener mListener;

    public RecyclerViewAdpater(ArrayList<Object> yourData,RecyclerViewActionListener mListener) {
        this.mListener = mListener;
    }

    @NonNull
    @Override
    public CustomViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item, parent, false );
        final CustomViewHolder holder = new CustomViewHolder(view);

        holder.webView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                mListener.onViewClicked(view.getId(), holder.getAdapterPosition());
            }
        });
        holder.paperView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                mListener.onViewClicked(view.getId(), holder.getAdapterPosition());
            }
        });
        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                mListener.onViewClicked(view.getId(), holder.getAdapterPosition());
            }
        });
        holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View view) {
                mListener.onViewLongClicked(view.getId(), holder.getAdapterPosition());
                return false;
            }
        });
        return holder;
    }

    public class CustomViewHolder extends RecyclerView.ViewHolder{
        // Other fields

        View itemView;
        View webView;
        View paperView;
        public CustomViewHolder(View view){
            super(view);
            // rest of initialization

            itemView = view;
        }
    }
}

然后在您的 Activity 中实现 RecyclerViewActionListener 并覆盖 RecyclerViewActionListener 中的方法：

public class MainActivity extends AppCompatActivity implements RecyclerViewActionListener {


    RecyclerViewAdpater adapter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main3);

        // Skipped for the sake of brevity
        // Pass your listener to adapter here
        adapter = new RecyclerViewAdpater(yourData, this );
    }

    @Override
    public void onViewClicked(int clickedViewId, int clickedItemPosition) {
        switch (clickedItemPosition){
            case R.id.web_view:
                // Application logic when webview clicked
                break;
            case R.id.paper_view:
                // Application logic when paperview clicked
                break;
            case R.id.recyclerview_item:
                // Application logic when whole item clicked
                break;
        }
    }

    @Override
    public void onViewLongClicked(int clickedViewId, int clickedItemPosition) {
        switch (clickedViewId){
            case R.id.recyclerview_item:
                // Application logic when whole item long-clicked
                break;
        }
    }
}

并且在您的 xml 文件中不要忘记为您的视图分配 ID。因为我们正在检测带有 ID 的点击视图。

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/recyclerview_item"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:id="@+id/web_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"/>

    <ImageView
        android:id="@+id/paper_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

</RelativeLayout>

Answer 3

尝试在您的 NewsPaperAdapter 类 onClickListner 中使用适配器的父布局，如下所示

holder.parentLayout.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

         final NewsPapersDataModel currentPaper = newsPapersList.get(position);
            Log.d("TAG","Clicked 1");

                newsSelectionDialog(currentPaper.getEpaper(),currentPaper.getWebsite());
        }
    });

这里parentLayout 是您的适配器项目布局根视图，例如Relative/Linear Layout