在android中从URL加载图片

<uses-permission android:name="android.permission.INTERNET" />

<ImageView
    android:id="@+id/imageView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/placeholder_image" />

private class LoadImageTask extends AsyncTask<String, Void, Bitmap> {
    private ImageView imageView;

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

    @Override
    protected Bitmap doInBackground(String... urls) {
        String imageUrl = urls[0];
        Bitmap bitmap = null;
        try {
            URL url = new URL(imageUrl);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setDoInput(true);
            connection.connect();
            InputStream inputStream = connection.getInputStream();
            bitmap = BitmapFactory.decodeStream(inputStream);
            inputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return bitmap;
    }

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

ImageView imageView = findViewById(R.id.imageView);
String imageUrl = "https://example.com/image.jpg";
new LoadImageTask(imageView).execute(imageUrl);