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方法一：

public static List
   
     listAllStorage(Context context) {        ArrayList
    
      storages = new ArrayList
     
      ();        StorageManager storageManager = (StorageManager) context.getSystemService(Context.STORAGE_SERVICE);        try {            Class
      [] paramClasses = {};            Method getVolumeList = StorageManager.class.getMethod("getVolumeList", paramClasses);            Object[] params = {};            Object[] invokes = (Object[]) getVolumeList.invoke(storageManager, params);            if (invokes != null) {                StorageInfo info = null;                for (int i = 0; i < invokes.length; i++) {                    Object obj = invokes[i];                    Method getPath = obj.getClass().getMethod("getPath", new Class[0]);                    String path = (String) getPath.invoke(obj, new Object[0]);                    info = new StorageInfo(path);                    Method getVolumeState = StorageManager.class.getMethod("getVolumeState", String.class);                    String state = (String) getVolumeState.invoke(storageManager, info.path);                    info.state = state;                    Method isRemovable = obj.getClass().getMethod("isRemovable", new Class[0]);                    info.isRemoveable = ((Boolean) isRemovable.invoke(obj, new Object[0])).booleanValue();                    if (info.state.equals(CommonUtil.MOUNTED)) {                        storages.add(info);                    }                }            }        } catch (Exception e) {            e.printStackTrace();        }        storages.trimToSize();        return storages;    }
     
    
   

public class StorageInfo {    public String path;    public String state;    public boolean isRemoveable;    public StorageInfo(String path) {        this.path = path;    }    public boolean isMounted() {        return "mounted".equals(state);    }    @Override    public String toString() {        return "StorageInfo [path=" + path + ", state=" + state                + ", isRemoveable=" + isRemoveable + "]";    }}

方法二：

/**            * 得到所有的存储路径（内部存储+外部存储）        *        * @param context    * @return            */    public static String[] getAllSdPaths(Context context) {        Method mMethodGetPaths = null;        String[] paths = null;        //通过调用类的实例mStorageManager的getClass()获取StorageManager类对应的Class对象        //getMethod("getVolumePaths")返回StorageManager类对应的Class对象的getVolumePaths方法，这里不带参数        StorageManager mStorageManager = (StorageManager)context                .getSystemService(context.STORAGE_SERVICE);//storage        try {            mMethodGetPaths = mStorageManager.getClass().getMethod("getVolumePaths");            paths = (String[]) mMethodGetPaths.invoke(mStorageManager);        } catch (Exception e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        return paths;    }

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