Android應用程序的內存使用情況

Question

我是android的新手，對內部和外部內存有疑問。 我使用2種方法來確定內存使用情況。 第一種方法是這樣的：

public static String getAvailableInternalMemorySize() {
    File path = Environment.getDataDirectory();
    StatFs stat = new StatFs(path.getPath());
    long blockSize = stat.getBlockSize();
    long availableBlocks = stat.getAvailableBlocks();
    return formatSize(availableBlocks * blockSize);
}

public static String getTotalInternalMemorySize() {
    File path = Environment.getDataDirectory();
    StatFs stat = new StatFs(path.getPath());
    long blockSize = stat.getBlockSize();
    long totalBlocks = stat.getBlockCount();
    return formatSize(totalBlocks * blockSize);
}

public static String getAvailableExternalMemorySize() {
    if (externalMemoryAvailable()) {
        File path = Environment.getExternalStorageDirectory();
        StatFs stat = new StatFs(path.getPath());
        long blockSize = stat.getBlockSize();
        long availableBlocks = stat.getAvailableBlocks();
        return formatSize(availableBlocks * blockSize);
    } else {
        return "ERROR";
    }
}

第二個是：

public long InternalTotalMemory(){
    StatFs statFs = new StatFs(Environment.getRootDirectory().getAbsolutePath());
    long blockCount = statFs.getBlockCountLong();
    long blockSize = statFs.getBlockSizeLong();
    long total = blockCount * blockSize;
    return total;
}

public long InternalFreeMemory(){
    StatFs statFs = new StatFs(Environment.getRootDirectory().getAbsolutePath());
    long availableBlock = statFs.getAvailableBlocksLong();
    long blockSize = statFs.getBlockSizeLong();
    long free = availableBlock * blockSize;
    return free;
}

但是我不明白為什么它們顯示出不同的價值。 1）總內部存儲器4 GB可用內部存儲器4 GB

2）總內部存儲器991,898 MB可用內部存儲器632,266 MB

我的錯誤在哪里或計算錯誤。

Answer 1

這對我來說是正確的，您應該使用這個...

File path = Environment.getDataDirectory();
StatFs stat = new StatFs(path.getPath());
long blockSize = stat.getBlockSize();
long availableBlocks = stat.getAvailableBlocks();
return Formatter.formatFileSize(this, availableBlocks * blockSize);