Android获取手机/SD卡内存空间使用情况

获取手机内存使用情况应该是很常用的了，不多说直接上代码

if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {//有SD卡
            File path = Environment.getExternalStorageDirectory();
            StatFs stat = new StatFs(path.getPath());
            //内存是分块的 分别获取块的数量和每块的大小
            long blockSize = stat.getBlockSize();
            long totalBlocks = stat.getBlockCount();
            long availableBlocks = stat.getAvailableBlocks();//可用内存块的数量

            long totalSize = totalBlocks * blockSize;
            long availSize = availableBlocks * blockSize;

            long hasUsed = totalSize - availSize;

//格式化
            totalStr = Formatter.formatFileSize(mActivity, totalSize);
            availStr = Formatter.formatFileSize(mActivity, availSize);
            hasUsedStr = Formatter.formatFileSize(mActivity, hasUsed);

        } else {
            //如果没有SD卡
            File path2 = Environment.getDataDirectory();
            StatFs stat2 = new StatFs(path2.getPath());
            long blockSize2 = stat2.getBlockSize();
            long totalBlocks2 = stat2.getBlockCount();
            long availableBlocks2 = stat2.getAvailableBlocks();

            long totalSize2 = totalBlocks2 * blockSize2;
            long availSize2 = availableBlocks2 * blockSize2;

            long hasUsed = totalSize2 - availSize2;

            totalStr = Formatter.formatFileSize(mActivity, totalSize2);
            availStr = Formatter.formatFileSize(mActivity, availSize2);
            hasUsedStr = Formatter.formatFileSize(mActivity, hasUsed);
        }

代码中注释的很清楚了，就不再解释了。有问题的欢迎提问。