android - 来自 URL 的图像未显示在 ImageView 中，我已经尝试了所有我能找到的

Question

我有一个包含十个图像 url 源的 String[]，我正在尝试让 ImageView 显示它们。我必须显示每个图像及其旁边的相应文本，即使文本显示图像也不起作用。我一直在尝试我能找到的所有解决方案，但似乎没有任何效果。我将不胜感激一些指导。

这是我正在尝试的解决方案:

我从扩展 ListActivity 的类中调用的方法 (titles 和 imageurls 都是 String[]，imageurls 包含图片 url 源，titles 包含要显示在图片旁边的文本)

setListAdapter(new MyPerformanceArrayAdapter(this, titles, imageurls));

这是我的 MyPerformanceArrayAdapter 代码:

public class MyPerformanceArrayAdapter extends ArrayAdapter<String> {
    private final Activity context;
    private final String[] names;
    private final String[] images;

    public MyPerformanceArrayAdapter(Activity context, String[] names, String[] images) {
        super(context, R.layout.rowlayout, names);
        this.context = context;
        this.names = names;
        this.images = images;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        LayoutInflater inflater = context.getLayoutInflater();
        View rowView = inflater.inflate(R.layout.rowlayout, null, true);
        TextView textView = (TextView) rowView.findViewById(R.id.label);
        ImageView imageView = (ImageView) rowView.findViewById(R.id.icon);

        String s = names[position];
        textView.setText(s);


        Drawable drawable = LoadImageFromWebOperations(images[position]);
        imageView.setImageDrawable(drawable);

        return rowView;
    }

    private Drawable LoadImageFromWebOperations(String url) {
        try {
            InputStream is = (InputStream) new URL(url).getContent();
            Drawable d = Drawable.createFromStream(is, "src name");
            return d;
        } catch (Exception e) {
            System.out.println("Exc="+e);
            return null;
        }
    }
}

非常感谢!

Answer 1

如果您使用来自 sdcard 的路径，下面的代码将起作用，否则如果您使用来自 drwable-res 文件夹的图像，请像为字符串数组一样创建一个静态位图数组

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    LayoutInflater inflater = context.getLayoutInflater();
    View rowView = inflater.inflate(R.layout.rowlayout, null, true);
    TextView textView = (TextView) rowView.findViewById(R.id.label);
    ImageView imageView = (ImageView) rowView.findViewById(R.id.icon);

    String s = names[position];
    textView.setText(s);

//此处完成的更改

    Bitmap bmp = LoadImageFromWebOperations(images[position]);
    imageView.setImageBitmap(bmp);

    return rowView;
}

//

private Drawable LoadImageFromWebOperations(String url) {
    try {
     // use bitmap instead of drawable
       Bitmap bmp=BitmapFactory.decodeStream(getContentResolver().openInputStream(capturedImage));

        return bmp;
    } catch (Exception e) {
        System.out.println("Exc="+e);
        return null;
    }
}