Android files saved to the app and SD card

Source: Internet
Author: User

<span style= "font-size:18px;" > 1 .权限添加 <uses-permission android:name= "android.permission.MOUNT_UNMOUNT_FILESYSTEMS" > <uses-permission android:name= "android.permission.WRITE_EXTERNAL_STORAGE" > public static String getDataFolderPath(Context paramContext) {          return Environment.getDataDirectory() + "/data/"                  + paramContext.getPackageName() + "/files" ;      }      public static String getMyFileDir(Context context){          return context.getFilesDir().toString();      }           public static String getMyCacheDir(Context context){          return context.getCacheDir().toString();      }      /**       * @desc 保存内容到文件中       * @param fileName       * @param content       * @throws Exception       */      public static void save(Context context, String fileName, String content, int module) {          try {              FileOutputStream os = context.openFileOutput(fileName, module);              os.write(content.getBytes());              os.close();          } catch (Exception e) {              e.printStackTrace();          }      }           /**       * @desc 读取文件内容       * @param fileName       * @return       */      public static String read(Context context, String fileName){                   try {              FileInputStream fis = context.openFileInput(fileName);              ByteArrayOutputStream bos = new ByteArrayOutputStream();              byte [] b = new byte [ 1024 ];              int len = 0 ;              while ((len = fis.read(b)) != - 1 ){                  bos.write(b, 0 , len);              }              byte [] data = bos.toByteArray();              fis.close();              bos.close();              return new String(data);          } catch (Exception e) {              e.printStackTrace();          }          return null ;      }                /**       * @desc 将文本内容保存到sd卡的文件中       * @param context       * @param fileName       * @param content       * @throws IOException       */      public static void saveToSDCard(Context context, String fileName, String content) throws IOException{                   File file = new File(Environment.getExternalStorageDirectory(),fileName);          FileOutputStream fos = new FileOutputStream(file);          fos.write(content.getBytes());          fos.close();      }      /**       * @desc 读取sd卡文件内容       * @param fileName       * @return       * @throws IOException       */      public static String readSDCard(String fileName) throws IOException {                   File file = new File(Environment.getExternalStorageDirectory(),fileName);          FileInputStream fis = new FileInputStream(file);          ByteArrayOutputStream bos = new ByteArrayOutputStream();          byte [] buffer =  new byte [ 1024 ];          int len = 0 ;          while ((len = fis.read(buffer)) != - 1 )          {              bos.write(buffer, 0 , len);          }          byte []  data = bos.toByteArray();          fis.close();          bos.close();                   return new String(data);      }</uses-permission></uses-permission></span>

A companion tour, a free dating site: www.jieberu.com

Push family, free tickets, scenic spots: www.tuituizu.com

Android files saved to the app and SD card

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.