Android中获取(RAM)总运存大小和可用运存大小

//获取可用运存大小

private long getAvailMemory(Context context){
        // 获取android当前可用内存大小
        ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
        MemoryInfo mi = new MemoryInfo();
        am.getMemoryInfo(mi);
        //mi.availMem; 当前系统的可用内存

        //return Formatter.formatFileSize(context, mi.availMem);// 将获取的内存大小规格化
        System.out.println("可用内存---->>>"+mi.availMem/(1024*1024));
        return mi.availMem/(1024*1024);
    }

//获取总运存大小

private long getTotalMemory(Context context){
        String str1 = "/proc/meminfo";// 系统内存信息文件
        String str2;
        String[] arrayOfString;
        long initial_memory = 0; 

        try
        {
            FileReader localFileReader = new FileReader(str1);
            BufferedReader localBufferedReader = new BufferedReader(
            localFileReader, 8192);
            str2 = localBufferedReader.readLine();// 读取meminfo第一行，系统总内存大小

            arrayOfString = str2.split("\\s+");
            for (String num : arrayOfString) {
                Log.i(str2, num + "\t");
            }

            initial_memory = Integer.valueOf(arrayOfString[1]).intValue() * 1024;// 获得系统总内存，单位是KB，乘以1024转换为Byte
            localBufferedReader.close();

        } catch (IOException e) {
        }
        //return Formatter.formatFileSize(context, initial_memory);// Byte转换为KB或者MB，内存大小规格化
        System.out.println("总运存--->>>"+initial_memory/(1024*1024));
        return initial_memory/(1024*1024);
    }