SD卡工具類

package com.duanlian.daimeng.utils;

import android.annotation.TargetApi;
import android.os.Build;
import android.os.Environment;
import android.os.StatFs;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;

/**
 * Get SD card info.
 * SD卡工具類 段煉
 */
public class SdCardUtil {
    private static final String TAG = SdCardUtil.class.getSimpleName();

    /**
     * Get {@link StatFs}.
     */
    public static StatFs getStatFs(String path) {
        return new StatFs(path);
    }

    /**
     * Get phone data path.
     *獲取手機數據路徑
     */
    public static String getDataPath() {
        return Environment.getDataDirectory().getPath();

    }

    /**
     * Get SD card path.
     * 得到SD卡路
     */
    public static String getNormalSDCardPath() {
        return Environment.getExternalStorageDirectory().getPath();
    }

    /**
     * Get SD card path by CMD.
     */
    public static String getSDCardPath() {
        String cmd = "cat /proc/mounts";
        String sdcard = null;
        Runtime run = Runtime.getRuntime();// 返回與當前 Java 應用程序相關的運行時對象
        BufferedReader bufferedReader = null;
        try {
            Process p = run.exec(cmd);// 啓動另一個進程來執行命令
            bufferedReader = new BufferedReader(new InputStreamReader(new BufferedInputStream(p.getInputStream())));
            String lineStr;
            while ((lineStr = bufferedReader.readLine()) != null) {
                if (lineStr.contains("sdcard")
                        && lineStr.contains(".android_secure")) {
                    String[] strArray = lineStr.split(" ");
                    if (strArray.length >= 5) {
                        sdcard = strArray[1].replace("/.android_secure", "");
                        return sdcard;
                    }
                }
                if (p.waitFor() != 0 && p.exitValue() == 1) {
                    // p.exitValue()==0表示正常結束，1：非正常結束
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (bufferedReader != null) {
                    bufferedReader.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        sdcard = Environment.getExternalStorageDirectory().getPath();
        return sdcard;
    }

    /**
     * Get SD card path list.
     * SD卡的路徑列表
     */
    public static ArrayList<String> getSDCardPathEx() {
        ArrayList<String> list = new ArrayList<String>();
        try {
            Runtime runtime = Runtime.getRuntime();
            Process proc = runtime.exec("mount");
            InputStream is = proc.getInputStream();
            InputStreamReader isr = new InputStreamReader(is);
            String line;
            BufferedReader br = new BufferedReader(isr);
            while ((line = br.readLine()) != null) {
                if (line.contains("secure")) {
                    continue;
                }
                if (line.contains("asec")) {
                    continue;
                }

                if (line.contains("fat")) {
                    String columns[] = line.split(" ");
                    if (columns.length > 1) {
                        list.add("*" + columns[1]);
                    }
                } else if (line.contains("fuse")) {
                    String columns[] = line.split(" ");
                    if (columns.length > 1) {
                        list.add(columns[1]);
                    }
                }
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return list;
    }

    /**
     * Get available size of SD card.
     * 獲得可用的SD卡的大小
     */
    @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2)
    public static long getAvailableSize(String path) {
        try {
            File base = new File(path);
            StatFs stat = new StatFs(base.getPath());
            return stat.getBlockSizeLong() * stat.getAvailableBlocksLong();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return 0;
    }

    /**
     * Get SD card info detail.
     * 得到SD卡信息細節
     */
    @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2)
    public static SDCardInfo getSDCardInfo() {
        SDCardInfo sd = new SDCardInfo();
        String state = Environment.getExternalStorageState();
        if (Environment.MEDIA_MOUNTED.equals(state)) {
            sd.isExist = true;
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
                File sdcardDir = Environment.getExternalStorageDirectory();
                StatFs sf = new StatFs(sdcardDir.getPath());

                sd.totalBlocks = sf.getBlockCountLong();
                sd.blockByteSize = sf.getBlockSizeLong();

                sd.availableBlocks = sf.getAvailableBlocksLong();
                sd.availableBytes = sf.getAvailableBytes();

                sd.freeBlocks = sf.getFreeBlocksLong();
                sd.freeBytes = sf.getFreeBytes();

                sd.totalBytes = sf.getTotalBytes();
            }
        }
        return sd;
    }


    /**
     * see more {@link StatFs}
     */
    public static class SDCardInfo {
        public boolean isExist;
        public long totalBlocks;
        public long freeBlocks;
        public long availableBlocks;

        public long blockByteSize;

        public long totalBytes;
        public long freeBytes;
        public long availableBytes;

        @Override
        public String toString() {
            return "SDCardInfo{" +
                    "isExist=" + isExist +
                    ", totalBlocks=" + totalBlocks +
                    ", freeBlocks=" + freeBlocks +
                    ", availableBlocks=" + availableBlocks +
                    ", blockByteSize=" + blockByteSize +
                    ", totalBytes=" + totalBytes +
                    ", freeBytes=" + freeBytes +
                    ", availableBytes=" + availableBytes +
                    '}';
        }
    }
}