Android读取设备内存大小

获取系统运行内存(RAM)大小：

 public static String getRAMTotalMemorySize(final Context context){                //获得ActivityManager服务的对象                ActivityManager mActivityManager = (ActivityManager)context.getSystemService(Context.ACTIVITY_SERVICE);                //获得MemoryInfo对象                ActivityManager.MemoryInfo memoryInfo = new ActivityManager.MemoryInfo() ;                //获得系统可用内存，保存在MemoryInfo对象上                mActivityManager.getMemoryInfo(memoryInfo) ;                long memSize = memoryInfo.totalMem ;                //字符类型转换                String availMemStr = formateFileSize(context,memSize);               return availMemStr ;    }

获取系统可用运行内存(RAM)大小：

 public static String getRAMAvaialbeMemorySize(final Context context){                //获得MemoryInfo对象                ActivityManager  mActivityManager = (ActivityManager)context.getSystemService(Context.ACTIVITY_SERVICE);                ActivityManager.MemoryInfo memoryInfo = new ActivityManager.MemoryInfo() ;                //获得系统可用内存，保存在MemoryInfo对象上                mActivityManager.getMemoryInfo(memoryInfo) ;                long memSize = memoryInfo.availMem ;                //字符类型转换                String availMemStr = formateFileSize(context,memSize);                return availMemStr ;    }

获取系统存储空间（ROM）大小:

 public static String getROMTotalSize(final Context context) {                File path = Environment.getExternalStorageDirectory();                StatFs stat = new StatFs(path.getPath());                long blockSize = stat.getBlockSize();                long totalBlocks = stat.getBlockCount();                String availMemStr = formateFileSize(context, blockSize * totalBlocks);                return availMemStr ;    }

获取系统可用存储空间（ROM）大小:

 public static String getROMAvailableSize(final Context context) {                File path = Environment.getExternalStorageDirectory();                StatFs stat = new StatFs(path.getPath());                long blockSize = stat.getBlockSize();                long availableBlocks = stat.getAvailableBlocks();                String availMemStr = formateFileSize(context, blockSize * availableBlocks);                return availMemStr ;    }

    //调用系统函数，字符串转换 long -String KB/MB    public static String formateFileSize(Context context,long size){        return Formatter.formatFileSize(context, size);    }

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