获取手机的储存空间

package com.itheima28.memorydemo;


import java.io.File;


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


public class MainActivity extends Activity {


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

TextView tvMemoryInfo = (TextView) findViewById(R.id.tv_memory_info);

// 获得sd卡的内存状态
File sdcardFileDir = Environment.getExternalStorageDirectory();
String sdcardMemory = getMemoryInfo(sdcardFileDir);

// 获得手机内部存储控件的状态
File dataFileDir = Environment.getDataDirectory();
String dataMemory = getMemoryInfo(dataFileDir);

tvMemoryInfo.setText("SD卡: " + sdcardMemory + "\n手机内部: " + dataMemory);
}


/**
* 根据路径获取内存状态
* @param path
* @return
*/
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
        
        // 总空间
        String totalMemory =  Formatter.formatFileSize(this, totalBlocks * blockSize);
        // 可用空间
        String availableMemory = Formatter.formatFileSize(this, availableBlocks * blockSize);

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