安卓recyclerview点击事件

实现 RecyclerView 的点击事件有多种方式，其中较为常用的两种方式如下：

1. 在 Adapter 中设置监听器

在 onBindViewHolder() 方法中为 RecyclerView 中的每个 item 设置点击监听器，代码如下：

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

    private List<String> mData;
    private OnItemClickListener mClickListener;

    public void setClickListener(OnItemClickListener clickListener) {
        mClickListener = clickListener;
    }

    // ...

    @Override
    public void onBindViewHolder(ViewHolder holder, final int position) {
        String item = mData.get(position);
        holder.mTextView.setText(item);
        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (mClickListener != null) {
                    mClickListener.onItemClick(position);
                }
            }
        });
    }

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

    // ...
}

在 Activity 或 Fragment 中设置监听器并处理点击事件，代码如下：

public class MyActivity extends AppCompatActivity {

    // ...

    private void initRecyclerView() {
        RecyclerView recyclerView = findViewById(R.id.recycler_view);
        MyAdapter adapter = new MyAdapter(mData);
        adapter.setClickListener(new MyAdapter.OnItemClickListener() {
            @Override
            public void onItemClick(int position) {
                // 处理点击事件
            }
        });
        recyclerView.setAdapter(adapter);
    }

    // ...
}

2. 实现 RecyclerView.OnItemTouchListener 接口

自定义一个 RecyclerView.OnItemTouchListener 实现类，然后实现其中的方法来处理点击事件，代码如下：

public class MyOnItemTouchListener implements RecyclerView.OnItemTouchListener {

    private GestureDetector mGestureDetector;
    private OnItemClickListener mClickListener;

    public MyOnItemTouchListener(Context context, final RecyclerView recyclerView, OnItemClickListener clickListener) {
        mClickListener = clickListener;
        mGestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
            @Override
            public boolean onSingleTapUp(MotionEvent e) {
                View childView = recyclerView.findChildViewUnder(e.getX(), e.getY());
                if (childView != null && mClickListener != null) {
                    int position = recyclerView.getChildAdapterPosition(childView);
                    mClickListener.onItemClick(position);
                    return true;
                }
                return false;
            }
        });
    }

    @Override
    public boolean onInterceptTouchEvent(@NonNull RecyclerView rv, @NonNull MotionEvent e) {
        return mGestureDetector.onTouchEvent(e);
    }

    @Override
    public void onTouchEvent(@NonNull RecyclerView rv, @NonNull MotionEvent e) {
        // do nothing
    }

    @Override
    public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
        // do nothing
    }

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

}

在 Activity 或 Fragment 中设置 OnItemTouchListener 并处理点击事件，代码如下：

public class MyActivity extends AppCompatActivity {

    // ...

    private void initRecyclerView() {
        RecyclerView recyclerView = findViewById(R.id.recycler_view);
        MyAdapter adapter = new MyAdapter(mData);
        recyclerView.setAdapter(adapter);
        recyclerView.addOnItemTouchListener(new MyOnItemTouchListener(this, recyclerView, new MyOnItemTouchListener.OnItemClickListener() {
            @Override
            public void onItemClick(int position) {
                // 处理点击事件
            }
        }));
    }

    // ...
}

以上是两种常用的 RecyclerView 点击事件实现方式，你可以选择其中一种或者结合使用。