Android获取设备挂载的U盘路径的方法有哪些？给出java代码，Android8.0以上

1. 使用StorageManager获取U盘路径

StorageManager storageManager = (StorageManager) getSystemService(Context.STORAGE_SERVICE);
List<StorageVolume> storageVolumes = storageManager.getStorageVolumes();
for (StorageVolume volume : storageVolumes) {
    if (volume.isRemovable() && volume.getState().equals(Environment.MEDIA_MOUNTED)) {
        File file = volume.getDirectory();
        String path = file.getAbsolutePath();
        Log.d(TAG, "U盘路径：" + path);
    }
}

2. 使用StorageStatsManager获取U盘路径

StorageStatsManager storageStatsManager = (StorageStatsManager) getSystemService(Context.STORAGE_STATS_SERVICE);
StorageManager storageManager = (StorageManager) getSystemService(Context.STORAGE_SERVICE);
List<StorageVolume> storageVolumes = storageManager.getStorageVolumes();
for (StorageVolume volume : storageVolumes) {
    if (volume.isRemovable() && volume.getState().equals(Environment.MEDIA_MOUNTED)) {
        File file = volume.getDirectory();
        try {
            StorageStats storageStats = storageStatsManager.queryStatsForUuid(volume.getUuid());
            long totalSize = storageStats.getTotalBytes();
            long availableSize = storageStats.getAvailableBytes();
            String path = file.getAbsolutePath();
            Log.d(TAG, "U盘路径：" + path);
            Log.d(TAG, "总大小：" + totalSize);
            Log.d(TAG, "可用大小：" + availableSize);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

注意：在Android 11及以上版本中，由于数据访问权限的限制，使用以上方法获取到的U盘路径可能为空。可以通过使用`ACTION_OPEN_DOCUMENT_TREE`打开系统文件浏览器，让用户手动选择U盘路径的方式来解决。