Android 安卓系统中的可用磁盘空间是什么？

一个代码/简单函数，将返回主android设备中可用和使用的磁盘空间

生成df命令并对其进行解析是最好的方法吗？还可以使用哪些其他方法

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事先非常感谢

我设法修好了一门好课

// PHONE STORAGE
public static long phone_storage_free(){
    File path = Environment.getDataDirectory();
    StatFs stat = new StatFs(path.getPath());
    long free_memory = stat.getAvailableBlocks() * stat.getBlockSize(); //return value is in bytes

    return free_memory;
}

public static long phone_storage_used(){
    File path = Environment.getDataDirectory();
    StatFs stat = new StatFs(path.getPath());
    long free_memory = (stat.getBlockCount() - stat.getAvailableBlocks()) * stat.getBlockSize(); //return value is in bytes

    return free_memory;
}

public static long phone_storage_total(){
    File path = Environment.getDataDirectory();
    StatFs stat = new StatFs(path.getPath());
    long free_memory = stat.getBlockCount() * stat.getBlockSize(); //return value is in bytes

    return free_memory;
}   

// SD CARD
public static long sd_card_free(){

    File path = Environment.getExternalStorageDirectory();
    StatFs stat = new StatFs(path.getPath());
    long free_memory = stat.getAvailableBlocks() * stat.getBlockSize(); //return value is in bytes

    return free_memory;
}
public static long sd_card_used(){

    File path = Environment.getExternalStorageDirectory();
    StatFs stat = new StatFs(path.getPath());
    long free_memory = (stat.getBlockCount() - stat.getAvailableBlocks()) * stat.getBlockSize(); //return value is in bytes

    return free_memory;
}
public static long sd_card_total(){

    File path = Environment.getExternalStorageDirectory();
    StatFs stat = new StatFs(path.getPath());
    long free_memory = stat.getBlockCount() * stat.getBlockSize(); //return value is in bytes

    return free_memory;
}

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我试图使用df命令进行系统调用并解析输出，但可能存在重复。但是他们的API函数是否用于此目的？不推荐使用API>=18的getAvailableBlocks（）和getBlockSize（）。使用

getAvailableBlocksLong（）

和

getBlockSizeLong（）

代替。如果API>=18，您可以直接调用getAvailableBytes（），而不必考虑块和块大小。