<?xml version="1.0" encoding="utf-8"?>

 
 
    
 
  
   
    
 
    
   
  
 
 

package com.itheima28.memorydemo;
 
import Java.io.File;
 
import android.os.Bundle;
import android.os.Environment;
import android.os.StatFs;
import android.support.v7.app.ActionBarActivity;
import android.text.format.Formatter;
import android.widget.TextView;
 
public class MainActivity extends ActionBarActivity {
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  
  TextView tvMemoryInfo = (TextView) findViewById(R.id.tv_memory_info);
  
  //獲得sd卡的內(nèi)存狀態(tài)
  File sdcardFileDir = Environment.getExternalStorageDirectory();
  String sdcardMemory = getMemoryInfo(sdcardFileDir);
 
  //獲得手機內(nèi)部存儲控件的狀態(tài)
  File dataFileDir = Environment.getDataDirectory();
  String dataMemory = getMemoryInfo(dataFileDir);
 
  tvMemoryInfo.setText("SD卡: " + sdcardMemory + "\n手機內(nèi)部: " + dataMemory);
 }
 
 /**
  * 根據(jù)路徑獲取內(nèi)存狀態(tài)
  * @param path
  * @return
  */
 @SuppressWarnings("deprecation")
 private String getMemoryInfo(File path) {
  //獲得一個磁盤狀態(tài)對象
  StatFs stat = new StatFs(path.getPath());
  
  //獲得一個扇區(qū)的大小
  long blockSize = stat.getBlockSize();
 
  //獲得扇區(qū)的總數(shù)
  long totalBlocks = stat.getBlockCount();
  
  //獲得可用的扇區(qū)數(shù)量
  long availableBlocks = stat.getAvailableBlocks();
 
  //總空間
  String totalMemory = Formatter.formatFileSize(this, totalBlocks * blockSize);
  
  //可用空間
  String availableMemory = Formatter.formatFileSize(this, availableBlocks * blockSize);
  
  return "總空間：" + totalMemory + "\n可用空間：" + availableMemory;
 }
}