获取手机存储空间信息

package com.suzi.getmemoryinfo;

import android.os.Bundle;
import android.os.Environment;
import android.os.StatFs;
import android.support.v7.app.AppCompatActivity;
import android.text.format.Formatter;
import android.widget.TextView;

import java.io.File;

public class MainActivity extends AppCompatActivity
{
//控件
private TextView tv = null;

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

tv = (TextView) findViewById(R.id.tv);

//获得手机内存空间信息
File dataFileDir = Environment.getDataDirectory();
String dataMemoryInfo = getMemoryInfo(dataFileDir);

//获得SD卡存储空间信息
File sdFileDir = Environment.getExternalStorageDirectory();
String sdMemoryInfo = getMemoryInfo(sdFileDir);

tv.setText("手机内存：\n" + dataMemoryInfo + "\nSD卡：\n" + sdMemoryInfo);
}

private String getMemoryInfo(File path)
{
// 获得一个磁盘状态对象
StatFs stat = new StatFs(path.getPath());

long blockSize = stat.getBlockSize();    // 获得一个扇区的大小

long totalBlocks = stat.getBlockCount();    // 获得扇区的总数

long availableBlocks = stat.getAvailableBlocks();    // 获得可用的扇区数量

//总存储空间
String totalMemory = Formatter.formatFileSize(this, blockSize * totalBlocks);
//可用空间
String availableMemory = Formatter.formatFileSize(this, blockSize * availableBlocks);

return "总空间：" + totalMemory + "\n可用空间：" + availableMemory;
}
}