[Android Pro] StorageManager简介

public static String[] getStoragePaths(Context cxt) {
        List<String> pathsList = new ArrayList<String>();
        if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.GINGERBREAD) {
            StringBuilder sb = new StringBuilder();
            try {
                pathsList.addAll(new SdCardFetcher().getStoragePaths(new FileReader("/proc/mounts"), sb));
            } catch (FileNotFoundException e) {
                e.printStackTrace();
                File externalFolder = Environment.getExternalStorageDirectory();
                if (externalFolder != null) {
                    pathsList.add(externalFolder.getAbsolutePath());
                }
            }
        } else {
            StorageManager storageManager = (StorageManager) cxt.getSystemService(Context.STORAGE_SERVICE);
            try {
                Method method = StorageManager.class.getDeclaredMethod("getVolumePaths");
                method.setAccessible(true);
                Object result = method.invoke(storageManager);
                if (result != null && result instanceof String[]) {
                    String[] pathes = (String[]) result;
                    StatFs statFs;
                    for (String path : pathes) {
                        if (!TextUtils.isEmpty(path) && new File(path).exists()) {
                            statFs = new StatFs(path);
                            if (statFs.getBlockCount() * statFs.getBlockSize() != 0) {
                                pathsList.add(path);
                            }
                        }
                    }
                }
            } catch (Exception e) {
                e.printStackTrace();
                File externalFolder = Environment.getExternalStorageDirectory();
                if (externalFolder != null) {
                    pathsList.add(externalFolder.getAbsolutePath());
                }
            }
        }
        return pathsList.toArray(new String[pathsList.size()]);
    }