StorageUtil

package com.android.demo.lileidemo.utils;

import android.content.Context;
import android.os.Environment;
import android.os.StatFs;
import android.util.Log;

import com.android.demo.lileidemo.constant.AppConstants;

import java.io.File;

/**
 * date: 04/08/2020.
 * author: lilei.
 */
public class StorageUtil {
    private static final String TAG = AppConstants.APP_TAG + "StorageUtil ";
    private static final boolean DEBUG = false;
    private static volatile StorageUtil mInstance;

    public static StorageUtil getInstance() {
        if (null == mInstance) {
            synchronized (StorageUtil.class) {
                if (null == mInstance) {
                    mInstance = new StorageUtil();
                }
            }
        }
        return mInstance;
    }

    public String checkSD(Context contect) {

        File data = new File("/data");
        Environment.getDataDirectory(); //获得data的路径
        StatFs data_stat = new StatFs(data.getPath()); //创建StatFs对象
        Log.d(TAG, "checkSD() data.getPath():" + data.getPath());
        long data_blockSize = data_stat.getBlockSize(); //获取block的size
        float data_totalBlocks = data_stat.getBlockCount();//获取block的个数
        float data_totalInMb = (float) ((data_blockSize * data_totalBlocks) / 1024 / 1024);//计算总容量
        long data_availableBlocks = data_stat.getAvailableBlocks(); //获取可用block的个数
        float data_available = (float) ((data_blockSize * data_availableBlocks) / 1024 / 1024);//计算可用容量
        String notice = "FLASH使用情况：\n总容量：" + data_totalInMb + "M.\n已用:" + (data_totalInMb - data_available + "\n可用:" + data_available + "M.");
        //很多情况下data分区就是sdcard
        if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
            File filePath = Environment.getExternalStorageDirectory();    //获得sd 卡的路径

            StatFs stat = new StatFs(filePath.getPath());                 //创建StatFs对象
            long blockSize = stat.getBlockSize();                         //获取block的size
            float totalBlocks = stat.getBlockCount();                     //获取block的个数
            int sizeInMb = (int) (blockSize * totalBlocks) / 1024 / 1024;       //计算总容量
            long availableBlocks = stat.getAvailableBlocks();             //可用block的个数
            float percent = (int) (blockSize * availableBlocks) / 1024 / 1024;              //计算可用容量

            notice = notice + "\nSD卡使用情况：\n总容量：" + sizeInMb + "M.\n已用：" + (sizeInMb - percent + "M\n可用:" + percent + "M.");
            return notice;
        } else {
            notice = notice + "\nSD卡使用情况：未插入SD卡";
            return notice;
        }

    }
}