从自动下载url加载图像

好吧,如果不想使用像Piccaso这样的库,试试这样的方法:

public class AsyncTaskLoadImage  extends AsyncTask<String, String, Bitmap> {
    private final static String TAG = "AsyncLoadImage"; 
    private ImageView imageView;
    public AsyncTaskLoadImage(ImageView imageView) {
    this.imageView = imageView;
    }
    @Override
    protected Bitmap doInBackground(String... params) {
        Bitmap bitmap = null;
        try {
            URL url = new URL(params[0]);
                bitmap = BitmapFactory.decodeStream((InputStream)url.getContent());
    } catch (IOException e) {
        Log.e(TAG, e.getMessage());
    }
        return bitmap;
    }
    @Override
    protected void onPostExecute(Bitmap bitmap) {
       StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
       StrictMode.setThreadPolicy(policy);              
       imageView.setImageBitmap(bitmap);
    }
}

你的活动是这样的:

String url = "YOUR_LINK_HERE";
new AsyncTaskLoadImage(imageView).execute(url);

或者

用更少的代码尝试一些东西 like this answer :

URL url = new URL("YOUR_LINK_HERE");
Bitmap bmp = BitmapFactory.decodeStream(url.openConnection().getInputStream());
imageView.setImageBitmap(bmp);