如何将位图插入到Gridview中？

public class ImageAdapter extends BaseAdapter {
    private Context mContext;
    private List<Bitmap> mBitmapList;

    public ImageAdapter(Context context, List<Bitmap> bitmapList) {
        mContext = context;
        mBitmapList = bitmapList;
    }

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

    @Override
    public Object getItem(int position) {
        return mBitmapList.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.from(mContext);
            convertView = inflater.inflate(R.layout.grid_item, parent, false);
        }

        ImageView imageView = convertView.findViewById(R.id.image_view);
        imageView.setImageBitmap(mBitmapList.get(position));

        return convertView;
    }
}

public class MainActivity extends AppCompatActivity {
    private GridView mGridView;
    private ImageAdapter mImageAdapter;
    private List<Bitmap> mBitmapList;

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

        mGridView = findViewById(R.id.grid_view);
        mBitmapList = new ArrayList<>();
        // 添加位图到mBitmapList中

        mImageAdapter = new ImageAdapter(this, mBitmapList);
        mGridView.setAdapter(mImageAdapter);
    }
}