java - 我正在尝试从链接下载图像并将其显示在 ImageView 中，但行 imgView.setImageBitmap(myImg);抛出一些错误

Question

我试图通过链接从 Internet 获取图像，并通过按下按钮将其显示在 imageView 上，但图像不会显示。经过一些调试后，我发现该行 imgView.setImageBitmap(myImg);抛出异常。

public class MainActivity extends AppCompatActivity {
    ImageView imgView;

public void imageFromWeb(View view){

    imageDownloader task = new imageDownloader();
    Bitmap myImg;
    try{
        myImg = task.execute("https://upload.wikimedia.org/wikipedia/commons/4/40/R_federer.jpg").get();
        imgView.setImageBitmap(myImg);
    }catch(Exception e){
        Log.i("check","error");
        e.printStackTrace();
    }



}

public class imageDownloader extends AsyncTask<String, Void, Bitmap>{

    @Override
    protected Bitmap doInBackground(String... urls) {
        URL url;
        HttpURLConnection urlConnection;
        try {
            url = new URL(urls[0]);
            urlConnection = (HttpURLConnection) url.openConnection();
            urlConnection.connect();
            InputStream inputStream = urlConnection.getInputStream();
            Bitmap img = BitmapFactory.decodeStream(inputStream);
            return img;

        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return null;
    }
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    imgView = findViewById(R.id.imageView);
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
}

当我运行应用程序并单击按钮时，我看到打印了“检查错误”行，我在 imageFromWeb 函数的 catch block 中打印了 log.i 以及

2019-05-28 10:29:13.515 4764-4764/com.ashwin.imagefromweb I/Choreographer: Skipped 53 frames!  The application may be doing too much work on its main thread.

这里出了什么问题？非常感谢!

Answer 1

尝试使用 Glide 从 url 访问图像

Glide.with(this)
        .load("url here") // image url
        .placeholder(R.drawable.placeholder) // any placeholder to load at start
        .error(R.drawable.imagenotfound)  // any image in case of error
        .override(200, 200); // resizing
        .centerCrop();     
        .into(imageView);  // imageview object