Android - 网络请求坑-setDoOutput

Android - 网络请求坑-setDoOutput.java

 /**
     * 从Url中获取Bitmap
     *
     * @param url
     * @return
     */
    private Bitmap getBitmapFormUrl(String url) {
        Bitmap bitmap = null;
        HttpURLConnection con = null;
        try {
            URL mImageUrl = new URL(url);
            con = (HttpURLConnection) mImageUrl.openConnection();
            con.setConnectTimeout(10 * 1000);
            con.setReadTimeout(10 * 1000);
            con.setDoInput(true);
//            con.setDoOutput(true);  //注意设置为true仅为post时，GET 方式需要忽略，否则405错误
            con.setInstanceFollowRedirects(true);
            con.setRequestMethod("GET");


            Logger.i("url:"+url+", getResponseCode:"+con.getResponseCode());

            if (con.getResponseCode() >= HttpURLConnection.HTTP_OK
                    && con.getResponseCode()< 300){ //OK
                bitmap = BitmapFactory.decodeStream(con.getInputStream());

            }else{
                Logger.i("url:"+url+", getResponseCode:"+con.getResponseCode()
                        +",content:"+ ConvertToString(con.getErrorStream()));

            }

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (con != null) {
                con.disconnect();
            }
        }
        return bitmap;
    }