Android获取系统储存以及内存信息的方法（二）

 private static final String FILENAME_PROC_MEMINFO = "/proc/meminfo";
/**
 * 获取手机内存总大小
 * @return
 */
 public static String getTotalMemorySize() {
    try {
      FileReader fr = new FileReader(FILENAME_PROC_MEMINFO);
      BufferedReader br = new BufferedReader(fr,2048);
//      String memoryLine = br.readLine();
      String subMemoryLine = "";
      String Line = "";
      while ((Line = br.readLine()) != null)
      {
        if (Line.contains("MemTotal:")){
          subMemoryLine = Line.substring(Line.indexOf("MemTotal:"));
          break;
        }

      }
      br.close();
      Matcher mer = Pattern.compile("^[0-9]+$").matcher(subMemoryLine.replaceAll("D+",""));
      //如果为正整数就说明数据正确的，确保在Double.parseDouble中不会异常
      if (mer.find()) {
        long memSize = Integer.parseInt(subMemoryLine.replaceAll("D+","")) ;
        double mem = (Double.parseDouble(memSize + "")/1024)/1024;
        NumberFormat nf = new DecimalFormat( "0.0 ");
        mem = Double.parseDouble(nf.format(mem));
        //Log.e(LOG_TAG,"=========mem================ " + mem);
        return String.valueOf(mem);
      }
    } catch (IOException e) {
      e.printStackTrace();
    }
    return "Unavailable";
  }

  /**
   * 获取手机剩余内存大小
   * @return
   */
  public static String getFreeMemorySize() {
    try {
      FileReader fr = new FileReader(FILENAME_PROC_MEMINFO);
      BufferedReader br = new BufferedReader(fr,2048);
//      String memoryLine = br.readLine();
      String subMemoryLine = "";
      String Line = "";
      while ((Line = br.readLine()) != null)
      {
        if (Line.contains("MemFree:")){
          subMemoryLine = Line.substring(Line.indexOf("MemFree:"));
          break;
        }

      }
      br.close();
      Matcher mer = Pattern.compile("^[0-9]+$").matcher(subMemoryLine.replaceAll("D+","=========mem================ " + mem);
        return String.valueOf(mem);
      }
    } catch (IOException e) {
      e.printStackTrace();
    }
    return "Unavailable";
  }

private static final String FILENAME_PROC_EMMCINFO = "/proc/partitions";
 /**
   * 获取手机储存大小
   * @return
   */
 public static String getEmmcSize() {
    try {
      FileReader fr = new FileReader(FILENAME_PROC_EMMCINFO);
      BufferedReader br = new BufferedReader(fr,2048);
      String Line = "";
      String EmmcSize = "";
      while ((Line = br.readLine()) != null)
      {
        if (Line.length() >7 && Line.lastIndexOf(" ") > 0) {
          if (Line.substring(Line.lastIndexOf(" ") + 1,Line.length()).equals("mmcblk0"))
          {

            EmmcSize = removeAllSpace(Line);
            break;
          }
        }

      }
      br.close();
      if (EmmcSize.length() >7 ){
        EmmcSize = (String) EmmcSize.subSequence(4,EmmcSize.length()-7);

        Matcher mer = Pattern.compile("^[0-9]+$").matcher(EmmcSize);
        //如果为正整数就说明数据正确的，确保在Double.parseDouble中不会异常
        if (mer.find()) {
          double mem = (Double.parseDouble(EmmcSize)/1024)/1024;
          NumberFormat nf = new DecimalFormat( "0.0 ");
          mem = Double.parseDouble(nf.format(mem));
          return String.valueOf(mem);
        }
      }
      return "0";
    } catch (IOException e) {
      e.printStackTrace();
    }
    return "Unavailable";
  }