在android中从URL将位图加载到ImageView

我使用以下方法从url检索位图并将其传递到imageview，但imageview未被更新

 public static Bitmap LoadImageFromWebOperations(String url) {
    Bitmap bitmap;
    try {
        InputStream is = new URL(url).openStream();
       bitmap = BitmapFactory.decodeStream(is);
        return bitmap;
    } catch (Exception e) {
         return null;
    }

呼叫-

  mov1_poster.setImageBitmap(VPmovies.LoadImageFromWebOperations(mov_details[0][7]));
//doesn't work

  Toast.makeText(this,"url is \n"+mov_details[0][7],Toast.LENGTH_LONG).show();
   // shows the url of the image successfully (just to check the url is not null)

我做错什么了吗？请提供帮助。

在处理图像时使用，它会产生奇迹，而且很简单

public class DownloadImageTask extends AsyncTask<String, Void, Bitmap> {
    private ImageView imageView;
    private Bitmap image;

    public DownloadImageTask(ImageView imageView) {
        this.imageView = imageView;
    }

    protected Bitmap doInBackground(String... urls) {
        String urldisplay = urls[0];
        try {
            InputStream in = new java.net.URL(urldisplay).openStream();
            image = BitmapFactory.decodeStream(in);
        } catch (Exception e) {
            image = null;
        }
        return image;
    }

    @SuppressLint("NewApi")
    protected void onPostExecute(Bitmap result) {
        if (result != null) {
            imageView.setImageBitmap(result);
        }
    }
}

Picasso.with(context).load("http://i.imgur.com/DvpvklR.png").into(imageView);

---

可能是重复的谢谢，非常有用。检查日志后，我发现NetworkOnMainThreadException是原因，当应用程序尝试在其主线程上执行网络操作时，会引发此异常。对于这一点，您的答案是正确的，在一个单独的（后台）线程中运行该操作。

Picasso.with(context).load("http://i.imgur.com/DvpvklR.png").into(imageView);