Android ListView未填充

ListView listView = findViewById(R.id.listView);
MyAdapter adapter = new MyAdapter(this, dataList);
listView.setAdapter(adapter);

public class MyAdapter extends BaseAdapter {
    private Context context;
    private List<String> dataList;

    public MyAdapter(Context context, List<String> dataList) {
        this.context = context;
        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) {
        if (convertView == null) {
            LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = inflater.inflate(R.layout.list_item, parent, false);
        }
        TextView textView = convertView.findViewById(R.id.textView);
        textView.setText(dataList.get(position));
        return convertView;
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:padding="16dp">

    <TextView
        android:id="@+id/textView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="16sp" />
</LinearLayout>

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder;
    if (convertView == null) {
        convertView = LayoutInflater.from(context).inflate(R.layout.list_item, parent, false);
        holder = new ViewHolder();
        holder.textView = convertView.findViewById(R.id.textView);
        convertView.setTag(holder);
    } else {
        holder = (ViewHolder) convertView.getTag();
    }
    holder.textView.setText(dataList.get(position));
    return convertView;
}

static class ViewHolder {
    TextView textView;
}