如何使用Adapter类将20个对象的数组中的12个对象随机生成到GridView上？

<GridView
    android:id="@+id/gridView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:numColumns="3"
    android:verticalSpacing="10dp"
    android:horizontalSpacing="10dp"
    android:padding="10dp"/>

GridView gridView = findViewById(R.id.gridView);
Adapter adapter = new CustomAdapter(this, dataArray);

gridView.setAdapter(adapter);

public class CustomAdapter extends BaseAdapter {
    private Context context;
    private Object[] dataArray;

    public CustomAdapter(Context context, Object[] dataArray) {
        this.context = context;
        this.dataArray = dataArray;
    }

    @Override
    public int getCount() {
        return dataArray.length;
    }

    @Override
    public Object getItem(int position) {
        return dataArray[position];
    }

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

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // 创建或复用视图
        if (convertView == null) {
            convertView = LayoutInflater.from(context).inflate(R.layout.grid_item, parent, false);
        }

        // 获取当前位置的数据项
        Object data = getItem(position);

        // 在视图中显示数据项
        TextView textView = convertView.findViewById(R.id.textView);
        textView.setText(data.toString());

        return convertView;
    }
}