Android popowindow弹出RecyclerView列表 代码

好的，这是一个简单的Android代码示例，用于在PopupWindow中弹出RecyclerView列表。首先，您需要在布局文件中定义PopupWindow和RecyclerView：

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

    <Button
        android:id="@+id/show_popup_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Show Popup" />

    <PopupWindow
        android:id="@+id/popup_window"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="#FFFFFF"
        android:elevation="10dp"
        android:padding="10dp">

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/recyclerview"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="#FFFFFF" />

    </PopupWindow>
</RelativeLayout>

接下来，在您的活动中，您需要初始化PopupWindow和RecyclerView，并在按钮单击事件上设置PopupWindow：

public class MainActivity extends AppCompatActivity {

    private Button showPopupButton;
    private PopupWindow popupWindow;
    private RecyclerView recyclerView;

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

        // 初始化UI组件
        showPopupButton = findViewById(R.id.show_popup_button);
        recyclerView = findViewById(R.id.recyclerview);

        // 初始化PopupWindow
        popupWindow = new PopupWindow(this);
        popupWindow.setContentView(recyclerView);
        popupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
        popupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
        popupWindow.setFocusable(true);

        // 初始化RecyclerView
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        recyclerView.setAdapter(new MyAdapter());

        // 设置按钮单击事件
        showPopupButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // 显示PopupWindow
                popupWindow.showAsDropDown(showPopupButton);
            }
        });
    }

    // 实现RecyclerView适配器
    private class MyAdapter extends RecyclerView.Adapter<MyViewHolder> {

        @NonNull
        @Override
        public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
            View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_view, parent, false);
            return new MyViewHolder(view);
        }

        @Override
        public void onBindViewHolder(@NonNull MyViewHolder holder, int position) {
            holder.textView.setText("Item " + position);
        }

        @Override
        public int getItemCount() {
            return 10;
        }
    }

    // 实现RecyclerView ViewHolder
    private static class MyViewHolder extends RecyclerView.ViewHolder {

        private TextView textView;

        public MyViewHolder(@NonNull View itemView) {
            super(itemView);
            textView = itemView.findViewById(R.id.text_view);
        }
    }
}

最后，您需要实现RecyclerView适配器和ViewHolder，以便在PopupWindow中显示列表项。这里只是一个简单的适配器和ViewHolder示例，您可以根据自己的需要进行更改和扩展。

希望这可以帮助您实现在PopupWindow中弹出RecyclerView列表！