Question

try {
        URL url = new URL("http://dantri.com.vn/xa-hoi.rss");
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.connect();

        InputStream is = new BufferedInputStream(url.openStream());
        OutputStream fos = new FileOutputStream("/sdcard/xa-hoi.rss");

        byte[] buffer = new byte[1024];
        int bufferLenght = 0;
        while((bufferLenght = is.read(buffer)) != -1){
            fos.write(buffer, 0, bufferLenght);
        }
        fos.close();
        fos.flush();
        is.close();
    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e){
        e.printStackTrace();
    }

LogCat：03-05 05：11：35.620：W / System.err（3437）：java.io.FileNotFoundException：http://m.dantri.com.vn/xa-hoi.rss。

此问题是网址“dantri.com.vn/xa-hoi.rss”更改为“m.dantri.com.vn/xa-hoi.rss” 请帮我！。谢谢大家。

Answer 1

确保您在清单中写了以下内容。

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

Answer 2

使用Environment.getExternalStorageDirectory()而不是静态字符串来获取SDCARD路径：

String sdcardpath = Environment.getExternalStorageDirectory().getAbsolutePath();
OutputStream fos = new FileOutputStream(sdcardpath+"/xa-hoi.rss");

并确保您已在AndroidManifest.xml中添加了SD卡权限： -

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

Answer 3

错误在于：

 OutputStream fos = new FileOutputStream("/sdcard/xa-hoi.rss");

替换为：

OutputStream fos = new FileOutputStream("xa-hoi.rss");

从URL下载时，URL自动更改导致错误“找不到文件”

3 个答案: