Question

我正在尝试将相同的图像添加到视图中。我有一个定时器，每20分钟就会关闭一次，我想添加一个图像来显示用户已完成一个计时器。

经过一些research我发现我需要使用ArrayAdapter。问题是我不明白这些代码是做什么的。有人可以向我解释一下吗？

到目前为止我发现的是：

protected void onCreate(){

//I need to create a gridview (it could be any type of view)
gridLayout = (GridView) findViewById(R.id.gridLayout);//created in Studio GUI

//Create an image
ImageView myImage = new ImageView(this);
myImage.setImageResource(R.mipmap.ic_launcher);

//Create an image list
private List<ImageView> imgs = new ArrayList<ImageView>();

//add images to list (this will need to be added to the timer later)
for (i = 0; i < numberOfTimersHit; i++){
    imgs.add(myImage);
    }

//add the list to an ArrayAdapter
//This is where I need help

//add the ArrayAdapter to the grid
gridLayout.setAdapter(imageViewArrayAdapter);

任何帮助将不胜感激。随意纠正我错过的任何事情。

Answer 1

在我看来，您需要有关实现ImageViewArrayAdapter的帮助，所以方法如下：

public class ImageViewArrayAdapter extends BaseAdapter {

    List<ImageView> images;

    public ImageViewArrayAdapter(List<ImageView> images) {
        this.images = images;
    }

    @Override
    public int getCount() {
        return images != null ? images.size() : 0;
    }

    @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) {
        return images.get(position);
    }
}

然后在你的代码中使用：

//add the list to an ArrayAdapter
//This is where I need help
ImageViewArrayAdapter imageViewArrayAdapter = new ImageViewArrayAdapter(imgs);

这可能有效。

将新图像添加到视图中

1 个答案: