Android获取SDcard目录及创建文件夹的方法

 public static String getSDPath() {    File sdDir = null;    boolean sdCardExist = Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);// 判断sd卡是否存在    if (sdCardExist) {      sdDir = Environment.getExternalStorageDirectory();// 获取跟目录    }    return sdDir.toString();  }

public static String mkdirs(String path) {    String sdcard = getSDPath();    if (path.indexOf(getSDPath()) == -1) {      path = sdcard + (path.indexOf("/") == 0 ? "" : "/") + path;    }    File destDir = new File(path);    if (!destDir.exists()) {      path = makedir(path);      if (path == null) {        return null;      }    }    return path;  }  private static String makedir(String path) {    String sdPath = getSDPath();    String[] dirs = path.replace(sdPath, "").split("/");    StringBuffer filePath = new StringBuffer(sdPath);    for (String dir : dirs) {      if (!"".equals(dir) && !dir.equals(sdPath)) {        filePath.append("/").append(dir);        File destDir = new File(filePath.toString());        if (!destDir.exists()) {          boolean b = destDir.mkdirs();          if (!b) {            return null;          }        }      }    }    return filePath.toString();  }

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /><!-- 在sdcard中创建/删除文件的权限 --><uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />

ImageView view5 = findView(R.id.imageview2);view5.setImageBitmap(ImageUtils.getLoacalBitmap("/storage/sdcard1/myimage/20160807.jpg"));public static Bitmap getLoacalBitmap(String url) {    try {       FileInputStream fis = new FileInputStream(url);       return BitmapFactory.decodeStream(fis);    } catch (FileNotFoundException e) {       //这里应显示默认图片，如图片无法显示等；从应用资源图片中选取       return null;    }  }