未将Arraylist添加到listview

// 创建适配器类
public class MyAdapter extends BaseAdapter {
    private ArrayList<String> dataList;

    public MyAdapter(ArrayList<String> dataList) {
        this.dataList = dataList;
    }

    @Override
    public int getCount() {
        return dataList.size();
    }

    @Override
    public Object getItem(int position) {
        return dataList.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // 获取列表项视图
        if (convertView == null) {
            convertView = LayoutInflater.from(parent.getContext()).inflate(android.R.layout.simple_list_item_1, parent, false);
        }

        // 获取对应位置的数据
        String data = dataList.get(position);

        // 将数据绑定到列表项视图上
        TextView textView = convertView.findViewById(android.R.id.text1);
        textView.setText(data);

        return convertView;
    }
}

// 在Activity或Fragment中使用适配器
public class MyActivity extends AppCompatActivity {
    private ListView listView;
    private ArrayList<String> dataList;

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

        // 实例化ListView控件
        listView = findViewById(R.id.listView);

        // 创建数据集合
        dataList = new ArrayList<>();
        dataList.add("Item 1");
        dataList.add("Item 2");
        dataList.add("Item 3");

        // 创建适配器实例
        MyAdapter adapter = new MyAdapter(dataList);

        // 设置适配器
        listView.setAdapter(adapter);
    }
}