Android files saved to the app and SD card

<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