Question

我想在Android上获得存储空间。这是我找到的解决方案。

StatFs stat = new StatFs(Environment.getExternalStorageDirectory().getAbsolutePath())
stat.getTotalBytes()

当设置应用显示774 MB时，它会返回1 GB。在AVD Manager中，磁盘上的大小为1 GB。是否可以像设置应用程序一样获得相同的值？

Answer 1

尝试，

StatFs stat1 = new StatFs("YOUR PATH HERE");
    long bytesAvailable1 = (long) stat1.getAvailableBlocks() * (long) stat1.getBlockSize();
    double spaceAvailableInSD1 = Double.parseDouble(new DecimalFormat("##.##").format(bytesAvailable1 / 1073741824d));  //return MB.

在我的情况下，我获得了确切的可用存储空间。

Answer 2

下面是检查是否有外部SD卡，内部存储空间和外部SD卡的总空间和可用空间的方法

public boolean isExternalSDCardAvailable() {
    String secStore = System.getenv("SECONDARY_STORAGE");
    if (secStore != null) {
        File f_secs = new File(secStore);
        return f_secs.exists();
    } else return false;
}

public long getAvailableInternalMemorySize() {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
        StatFs stat = new StatFs(Environment.getDataDirectory().getPath());
        long bytesAvailable = stat.getBlockSizeLong() * stat.getFreeBlocksLong();
        return bytesAvailable / (1024 * 1024);
    } else {
        StatFs stat = new StatFs(Environment.getDataDirectory().getPath());
        long bytesAvailable = (long) stat.getBlockSize() * (long) stat.getFreeBlocks();
        return bytesAvailable / (1024 * 1024);
    }
}

public long getTotalInternalMemorySize() {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
        StatFs stat = new StatFs(Environment.getDataDirectory().getPath());
        long bytesAvailable = stat.getBlockSizeLong() * stat.getBlockCountLong();
        return bytesAvailable / (1024 * 1024);
    } else {
        StatFs stat = new StatFs(Environment.getDataDirectory().getPath());
        long bytesAvailable = (long) stat.getBlockSize() * (long) stat.getAvailableBlocks();
        return bytesAvailable / (1024 * 1024);
    }
}

public long getAvailableExternalMemorySize() {
    String secStore = System.getenv("SECONDARY_STORAGE");
    File f_secs = new File(secStore);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
        StatFs stat = new StatFs(f_secs.getPath());
        long bytesAvailable = stat.getBlockSizeLong() * stat.getAvailableBlocksLong();
        return bytesAvailable / (1024 * 1024);
    } else {
        StatFs stat = new StatFs(f_secs.getPath());
        long bytesAvailable = stat.getBlockSize() * stat.getAvailableBlocks();
        return bytesAvailable / (1024 * 1024);
    }

}

public Long getTotalExternalMemorySize() {
    String secStore = System.getenv("SECONDARY_STORAGE");
    File f_secs = new File(secStore);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
        StatFs stat = new StatFs(f_secs.getPath());
        long bytesAvailable = stat.getBlockSizeLong() * stat.getBlockCountLong();
        long megAvailable = bytesAvailable / (1024 * 1024);
        return megAvailable;
    } else {
        StatFs stat = new StatFs(f_secs.getPath());
        long bytesAvailable = stat.getBlockSize() * stat.getBlockCount();
        long megAvailable = bytesAvailable / (1024 * 1024);
        return megAvailable;
    }

}

StatFs返回与设置

2 个答案: