用ImageLoder加载图片

注意了 ： 千万不要忘了给ImageLoder初始化 还有不要忘了倒包

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

    public interface  ImageBall{
        void callBitmap(Bitmap bitmap);
    }
    private ImageBall imageBall;

    public ImageLoder(ImageBall imageBall) {
        this.imageBall = imageBall;
    }

    @Override
    protected void onPostExecute(Bitmap bitmap) {

        imageBall.callBitmap(bitmap);
    }

    @Override
    protected Bitmap doInBackground(String... params) {
        try {
            String str=  params[0];
            URL url=new URL(str);
            HttpURLConnection connection= (HttpURLConnection) url.openConnection();
            connection.setReadTimeout(5000);
            connection.setRequestMethod("GET");
            connection.setConnectTimeout(5000);
          int code=  connection.getResponseCode();
            if (code==200){
             InputStream si= connection.getInputStream();

                return BitmapFactory.decodeStream(si);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
}