在Android Studio中使用自定义适配器设置图像源

<ImageView
    android:id="@+id/imageView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/default_image" />

public class CustomAdapter extends BaseAdapter {
    private Context context;
    private int[] imageIds;

    public CustomAdapter(Context context, int[] imageIds) {
        this.context = context;
        this.imageIds = imageIds;
    }

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

    @Override
    public Object getItem(int position) {
        return null;
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ImageView imageView;

        if (convertView == null) {
            imageView = new ImageView(context);
            imageView.setLayoutParams(new GridView.LayoutParams(200, 200));
            imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
        } else {
            imageView = (ImageView) convertView;
        }

        imageView.setImageResource(imageIds[position]);
        return imageView;
    }
}

GridView gridView = findViewById(R.id.gridView);
int[] imageIds = {R.drawable.image1, R.drawable.image2, R.drawable.image3};
CustomAdapter adapter = new CustomAdapter(this, imageIds);
gridView.setAdapter(adapter);