android 获取sd卡和手机存储空间 android获取外置sd卡路径

/**
     * 获取内置SD卡路径  
     * 内置SD卡路径：/storage/emulated/0
     * @return
     */
    public String getInnerSDCardPath() {   
        return Environment.getExternalStorageDirectory().getPath();  
    }
 
    /**
     * 获取外置SD卡路径   
     * 外置SD卡路径：/storage/extSdCard
     * @return  应该就一条记录或空
     */
    public List<string> getExtSDCardPath() 
    { 
        List<string> lResult = new ArrayList<string>();
        try {
            Runtime rt = Runtime.getRuntime();
            Process proc = rt.exec("mount");
            InputStream is = proc.getInputStream();
            InputStreamReader isr = new InputStreamReader(is);
            BufferedReader br = new BufferedReader(isr);
            String line;
            while ((line = br.readLine()) != null) {
                if (line.contains("extSdCard"))
                {
                    String [] arr = line.split(" ");
                    String path = arr[1];
                    File file = new File(path);
                    if (file.isDirectory())
                    {
                        lResult.add(path);
                    }
                }
            }
            isr.close();
        } catch (Exception e) {
        }
        return lResult;
    }

	//获取外置SD卡路径
	List<string> extPaths = getExtSDCardPath();
	for (String path : extPaths) {
	            log.append("外置SD卡路径：" + path + "\r\n");
	}
	System.out.println(log.toString());