android - 如何实用地为每个 GridView 项目设置不同的颜色/背景/高度/宽度等？

Question

我正在努力做到这一点

虽然我在 GridView 中有项目，但我想要项目的大小/颜色像图片中的那样。

这是我的代码

public class ImageAdapter  extends BaseAdapter {
    private Context mContext;

    // Constructor
    public ImageAdapter(Context c) {
        mContext = c;
    }

    public int getCount() {
        return mThumbIds.length;
    }

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

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

    // create a new ImageView for each item referenced by the Adapter
    public View getView(int position, View convertView, ViewGroup parent) {
        ImageButton imageView;

        if (convertView == null) {
            imageView = new ImageButton(mContext);
            imageView.setLayoutParams(new GridView.LayoutParams(85, 85));
            imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
            imageView.setPadding(8, 8, 8, 8);

        }
        else
        {
            imageView = (ImageButton) convertView;
        }
        imageView.setImageResource(mThumbIds[position]);
        imageView.setBackgroundColor(mThumbIds[0].);
        return imageView;
    }

    // Keep all Images in array
    public Integer[] mThumbIds = {
            R.drawable.town_hall1,
            R.drawable.town_hall2,
            R.drawable.town_hall3,
            R.drawable.town_hall4,
            R.drawable.town_hall5,
            R.drawable.town_hall6,
            R.drawable.town_hall7,
            R.drawable.town_hall8,
            R.drawable.town_hall9,
            R.drawable.town_hall10,
            R.drawable.town_hall11,
    };
}

我是初学者，请提供构建该布局的步骤。 谢谢

Answer 1

如果您在 mThumbIds 中有虚拟数据，那么您可以在 getView() 中使用 switch case，如下所示:

   public View getView(int position, View convertView, ViewGroup parent) {
    ImageButton imageView;

    if (convertView == null) {
    switch(position){
    case 1:
        imageView = new ImageButton(mContext);
        imageView.setLayoutParams(new GridView.LayoutParams(100, 100));
        imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
        imageView.setPadding(10, 10, 10, 10);
        imageView.setImageResource(mThumbIds[1]);
        imageView.setBackgroundColor(mThumbIds[0].);
        break;

    case 2:
        imageView = new ImageButton(mContext);
        imageView.setLayoutParams(new GridView.LayoutParams(85, 85));
        imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
        imageView.setPadding(8, 8, 8, 8);
        imageView.setImageResource(mThumbIds[2]);
        imageView.setBackgroundColor(mThumbIds[0].);
        break;

    case 3:
        imageView = new ImageButton(mContext);
        imageView.setLayoutParams(new GridView.LayoutParams(50, 50));
        imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
        imageView.setPadding(5, 5, 5, 5)
        imageView.setImageResource(mThumbIds[3]);
        imageView.setBackgroundColor(mThumbIds[0].);
        break;
     }
         }
    else
    {
        imageView = (ImageButton) convertView;
    }

    return imageView;
}

您可以使用与图像数量相等的案例数量。您为不同的图像设置了不同的属性。