Android中获取存储器容量_getavailableblockslong-优快云博客

本文链接：https://blog.youkuaiyun.com/poxiao58/article/details/50319023

本文介绍了一个简单的Android应用，用于获取并显示设备的外部存储空间大小。通过利用Android系统的API，该应用能够实时获取存储空间的可用块数，并将其转换为易于理解的文件大小单位进行展示。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

package com.itheima.getsdavail;

import java.io.File;

import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.os.StatFs;
import android.app.Activity;
import android.text.format.Formatter;
import android.view.Menu;
import android.widget.TextView;

public class MainActivity extends Activity {

@SuppressWarnings("deprecation")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

File path = Environment.getExternalStorageDirectory();
StatFs stat = new StatFs(path.getPath());
long blockSize;
long totalBlocks;
long availableBlocks;

//获取当前系统版本的等级
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2){
blockSize = stat.getBlockSizeLong();
totalBlocks = stat.getBlockCountLong();
availableBlocks = stat.getAvailableBlocksLong();
}
else{
blockSize = stat.getBlockSize();
totalBlocks = stat.getBlockCount();
availableBlocks = stat.getAvailableBlocks();
}

TextView tv = (TextView) findViewById(R.id.tv);
tv.setText(formatSize(availableBlocks * blockSize));
}

private String formatSize(long size) {
return Formatter.formatFileSize(this, size);
}

}