Android获取手机内存和sd卡相关信息

1、手机内存已用和可用空间

private String[] getPhoneMemory() {   
        String[] result = {"",""};  //1-total 2-avail   
        ActivityManager.MemoryInfo mi = new ActivityManager.MemoryInfo();    
        ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);

        am.getMemoryInfo(mi);     
        long mTotalMem = 0;   
        long mAvailMem = mi.availMem;   
        String str1 = "/proc/meminfo";   
        String str2;   
        String[] arrayOfString;   
        try {   
            FileReader localFileReader = new FileReader(str1);   
            BufferedReader localBufferedReader = new BufferedReader(localFileReader, 8192);   
            str2 = localBufferedReader.readLine();   
            arrayOfString = str2.split("\s+");   
            mTotalMem = Integer.valueOf(arrayOfString[1]).intValue() * 1024;   
            localBufferedReader.close();   
        } catch (IOException e) {   
            e.printStackTrace();   
        }   
        result[0] = Formatter.formatFileSize(this, mTotalMem);   
        result[1] = Formatter.formatFileSize(this, mAvailMem);   
        return result;    
}  

2、sd卡已用和可用空间

public long getAvailaleSize() {// sd卡信息（可用）
        File path = Environment.getExternalStorageDirectory(); // 取得sdcard文件路径
        StatFs stat = new StatFs(path.getPath());
        long blockSize = stat.getBlockSize();
        long availableBlocks = stat.getAvailableBlocks();
        return availableBlocks * blockSize/1024 /1024;
    }

    public long getAllSize() {//总大小
        File path = Environment.getExternalStorageDirectory();
        StatFs stat = new StatFs(path.getPath());
        long blockSize = stat.getBlockSize();
        long availableBlocks = stat.getBlockCount();
        return availableBlocks * blockSize/1024 /1024;
    }