Android RecyclerView项目点击事件与条件逻辑处理教程

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import androidx.recyclerview.widget.RecyclerView;

import java.util.List;

public class MyRecyclerViewAdapter extends RecyclerView.Adapter<MyRecyclerViewAdapter.ViewHolder> {

    private List<String> mData;
    private LayoutInflater mInflater;
    private ItemClickListener mClickListener; // 定义接口实例

    // 构造函数，用于传入数据和上下文
    MyRecyclerViewAdapter(Context context, List<String> data) {
        this.mInflater = LayoutInflater.from(context);
        this.mData = data;
    }

    // 负责创建并返回ViewHolder
    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = mInflater.inflate(R.layout.adapter_box, parent, false);
        return new ViewHolder(view);
    }

    // 负责将数据绑定到ViewHolder的视图上
    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        String item = mData.get(position);
        holder.myTextView.setText(item);
    }

    // 返回数据项总数
    @Override
    public int getItemCount() {
        return mData.size();
    }

    // ViewHolder类，持有视图引用并实现点击监听
    public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
        TextView myTextView;

        ViewHolder(View itemView) {
            super(itemView);
            myTextView = itemView.findViewById(R.id.text_adapter); // 假设您的布局中有此TextView
            itemView.setOnClickListener(this); // 为整个itemView设置点击监听
        }

        @Override
        public void onClick(View view) {
            // 当itemView被点击时，通过接口通知外部监听器
            if (mClickListener != null) {
                // 使用getAdapterPosition()获取当前ViewHolder在适配器中的位置
                mClickListener.onItemClick(view, getAdapterPosition());
            }
        }
    }

    // 便利方法：根据位置获取数据项
    public String getItem(int id) {
        return mData.get(id);
    }

    // 允许外部设置点击监听器
    public void setClickListener(ItemClickListener itemClickListener) {
        this.mClickListener = itemClickListener;
    }

    // 定义一个接口，用于Activity/Fragment响应点击事件
    public interface ItemClickListener {
        void onItemClick(View view, int position);
    }
}

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast; // 用于示例Toast

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity implements MyRecyclerViewAdapter.ItemClickListener {

    MyRecyclerViewAdapter adapter;
    RecyclerView recyclerView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main); // 假设您的主布局文件

        // 示例数据
        ArrayList<String> animalNames = new ArrayList<>();
        animalNames.add("Dog");
        animalNames.add("Cow");
        animalNames.add("Camel");
        animalNames.add("Sheep");
        animalNames.add("Goat");
        animalNames.add("hello"); // 添加一个用于测试的特定字符串

        // 设置RecyclerView
        recyclerView = findViewById(R.id.myList); // 假设您的布局中有此RecyclerView
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        adapter = new MyRecyclerViewAdapter(this, animalNames);
        adapter.setClickListener(this); // 设置点击监听器为当前Activity
        recyclerView.setAdapter(adapter);
    }

    // 实现MyRecyclerViewAdapter.ItemClickListener接口的方法
    @Override
    public void onItemClick(View view, int position) {
        // 通过适配器获取被点击项的数据
        String clickedItemData = adapter.getItem(position);

        // 根据数据内容执行条件逻辑
        if (clickedItemData.equals("Dog")) {
            Toast.makeText(this, "Clicked: " + clickedItemData + " - Playing Dog sound!", Toast.LENGTH_SHORT).show();
            // soundPlay(MediaPlayer.create(getBaseContext(), R.raw.star)); // 假设您有soundPlay方法和音频资源
        } else if (clickedItemData.equals("Camel")) {
            Toast.makeText(this, "Clicked: " + clickedItemData + " - Playing Camel sound!", Toast.LENGTH_SHORT).show();
            // soundPlay(MediaPlayer.create(getBaseContext(), R.raw.tick)); // 假设您有soundPlay方法和音频资源
        } else if (clickedItemData.equals("hello")) {
            // 模拟更新对话框中的文本
            // TextView details = word_dialog.findViewById(R.id.word_edit_desc); // 假设word_dialog和word_edit_desc存在
            // details.setText("hello");
            Toast.makeText(this, "Clicked: " + clickedItemData + " - Updating details!", Toast.LENGTH_SHORT).show();
        } else {
            Toast.makeText(this, "Clicked: " + clickedItemData + " at position " + position, Toast.LENGTH_SHORT).show();
        }
    }

    // 示例：播放声音的方法 (如果需要)
    // private void soundPlay(MediaPlayer player) {
    //     if (player != null) {
    //         player.start();
    //         player.setOnCompletionListener(mp -> {
    //             mp.release();
    //         });
    //     }
    // }
}