Question

我正在开发一个Android应用程序，我需要确定SD卡上的可用空间。任何人都可以给我一些关于此的建议。

感谢 kaisar

Answer 1

这样的事情应该有效：

File sdcard = Environment.getExternalStorageDirectory();
StatFs stat = new StatFs(sdcard.getAbsolutePath());
long available = stat.getAvailableBlocks() * (long) stat.getBlockSize();

Answer 2

您可能需要重新安排才能获得准确的结果：

StatFs stat = new StatFs(Environment.getExternalStorageDirectory().getAbsolutePath());
stat.restat(Environment.getExternalStorageDirectory().getAbsolutePath());
long available = ((long) stat.getAvailableBlocks() * (long) stat.getBlockSize());

Answer 3

查看此功能

 private boolean is_sdCardSaveToUse(){

    /**default disk cache size in bytes*/
    final int DEFAULT_DISK_CACHE_SIZE = 1024 * 1024 * 10; //10 MB

    /**get sdCard state*/
    String sdCardState = Environment.getExternalStorageState();

    /**check if the sdCard is mounted*/
    /**check if we can write to sdCard*/if (Environment.MEDIA_MOUNTED.equals(sdCardState)) {
        if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(sdCardState)) {
            Log.d("sdCard", "mounted readOnly");
        } else {
            Log.d("sdCard", "mounted readWrite");

            /**get free usable space in bytes */
            long freeUsableSpace = Environment.getExternalStorageDirectory().getUsableSpace();
            int temp = Math.round(((float) freeUsableSpace / 1024) / 1024); //convert from bytes to MB.
            Log.d("usableSpace= ", Integer.toString(temp) + " MB");

            if (freeUsableSpace > DEFAULT_DISK_CACHE_SIZE){
                return  true;
            } else {
                Log.d("sdCard","not enough space");
                return  false;
            }

        }

    } else{
        Log.d("sdCard","not mounted");
        return false;
    }

   return false;
}

如何从Android应用程序获取SD卡上的可用空间？

3 个答案: