Android的保存到外部SD卡吗？ [英] Android saving to external SD card?

问题描述

嗨谁能告诉我为什么我不能将此文件保存到外置SD？你可以检查过我的code？

 公共无效下载（）
  {
      尝试{
            //这是你想从远程服务器下载文件
            字符串路径=htt​​p://mozilla.cdn.leaseweb.com/firefox/releases/4.0.1/win32/en-US/Firefox%20Setup%204.0.1.exe;
            //这是本地文件，您将创建的名​​称
            串targetFileName;
                布尔EOF = ​​FALSE;
            URL U =新的URL（路径）;
            HttpURLConnection的C =（HttpURLConnection类）u.openConnection（）;
            c.setRequestMethod（GET）;
            c.setDoOutput（真）;
            c.connect（）;            //字符串svto = Environment.getExternalStorageState（）的toString（）。
            文件路径1 = Environment.getExternalStoragePublicDirectory（
                    Environment.DIRECTORY_PICTURES）;            path1.mkdirs（）;
            FileOutputStream中F =新的FileOutputStream（新文件（路径1 +/ fox.exe））;
                在的InputStream = c.getInputStream（）;
                字节[]缓冲区=新的字节[1024];
                INT LEN1 = 0;
                而（（LEN1 = in.read（缓冲液））！=  -  1）{
                f.write（缓冲液，0，LEN1）;
                         }
            f.close（）;
            }赶上（MalformedURLException的E）{
            // TODO自动生成catch块
            e.printStackTrace（）;
            }赶上（的ProtocolException E）{
            // TODO自动生成catch块
            e.printStackTrace（）;
            }赶上（FileNotFoundException异常五）{
            // TODO自动生成catch块
            e.printStackTrace（）;
            }赶上（IOException异常五）{
            // TODO自动生成catch块
            e.printStackTrace（）;
        }  }
 

解决方案

如果您不具有下列权限在的Andr​​oidManifest.xml 文件，该操作将失败：

 ＆LT;使用许可权的android：NAME =android.permission.WRITE_EXTERNAL_STORAG​​E/＆GT;
    ＆LT;使用许可权的android：NAME =android.permission.INTERNET对/＆GT;
 

请务必把他们的顶级内＆LT;清单＆GT; 标签，而不是＆lt;应用＆GT; 其中指定的活动标记。

Hey guys can someone tell me why i cannot save this file to the external sd? Can you check over my code?

 public void Download()
  {
      try {
            //this is the file you want to download from the remote server
            String path ="http://mozilla.cdn.leaseweb.com/firefox/releases/4.0.1/win32/en-US/Firefox%20Setup%204.0.1.exe";
            //this is the name of the local file you will create
            String targetFileName;
                boolean eof = false;
            URL u = new URL(path);
            HttpURLConnection c = (HttpURLConnection) u.openConnection();
            c.setRequestMethod("GET");
            c.setDoOutput(true);
            c.connect();

            //String svto = Environment.getExternalStorageState().toString();
            File path1 = Environment.getExternalStoragePublicDirectory(
                    Environment.DIRECTORY_PICTURES);

            path1.mkdirs();
            FileOutputStream f = new FileOutputStream(new File(path1+"/fox.exe"));
                InputStream in = c.getInputStream();
                byte[] buffer = new byte[1024];
                int len1 = 0;
                while ( (len1 = in.read(buffer)) !=  -1 ) {
                f.write(buffer,0, len1);
                         }
            f.close();
            } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            } catch (ProtocolException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

  }

解决方案

This operation will fail if you don't have the following permissions in your AndroidManifest.xml file:

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

Make sure to put them within the top-level <manifest> tag, not the <application> tag where your activities are specified.

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