android 获取存储卡信息及手机自身内存信息

package com.aiven.demo;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

import android.app.ActivityManager;
import android.app.ActivityManager.MemoryInfo;
import android.content.Context;
import android.os.Bundle;
import android.os.Environment;
import android.os.StatFs;
import android.text.format.Formatter;
import android.widget.TextView;

import com.wy.framework.util.EView;

/**
 *
 * @author Aiven
 *
 */
@EView(Layout = R.layout.main2)
public class MainActivity extends BaseActivity {

 private TextView mTextView;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  mTextView = (TextView) findViewById(R.id.myTest);
  mTextView.setText("总内存:" + getmem_TOLAL() + "   剩余内存:"
    + getAvailMemory() + "   " + getSdkMessage()+"   "+getOutSdkMessage());
 }

 // 获得手机自身总内存
 public String getmem_TOLAL() {
  long mTotal;
  // /proc/meminfo读出的内核信息进行解释
  String path = "/proc/meminfo";
  String content = null;
  BufferedReader br = null;
  try {
   br = new BufferedReader(new FileReader(path), 8);
   String line;
   if ((line = br.readLine()) != null) {
    content = line;
   }
  } catch (FileNotFoundException e) {
   e.printStackTrace();
  } catch (IOException e) {
   e.printStackTrace();
  } finally {
   if (br != null) {
    try {
     br.close();
    } catch (IOException e) {
     e.printStackTrace();
    }
   }
  }
  // beginIndex
  int begin = content.indexOf(':');
  // endIndex
  int end = content.indexOf('k');
  // 截取字符串信息

  content = content.substring(begin + 1, end).trim();
  mTotal = Integer.parseInt(content) * 1024;
  return Formatter.formatFileSize(getBaseContext(), mTotal);
 }

 /**
  * 获取当前手机自身可用内存
  * @return
  */
 private String getAvailMemory() {// 获取android当前可用内存大小
  ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
  MemoryInfo mi = new MemoryInfo();
  am.getMemoryInfo(mi);
  // mi.availMem; 当前系统的可用内存

  return Formatter.formatFileSize(getBaseContext(), mi.availMem);// 将获取的内存大小规格化
 }

 /**
  * 获取内置SDK信息
  * @return
  */
 private String getSdkMessage() {
  /** 获取存储卡路径 */
  File sdcardDir = Environment.getExternalStorageDirectory();
  /** StatFs 看文件系统空间使用情况 */
  StatFs statFs = new StatFs(sdcardDir.getPath());
  /** Block 的 size */
  long blockSize = statFs.getBlockSize();
  /** 总 Block 数量 */
  long totalBlocks = statFs.getBlockCount();
  /** 已使用的 Block 数量 */
  long availableBlocks = statFs.getAvailableBlocks();

  File[] list = sdcardDir.listFiles();
  for (int i = 0; i < list.length; i++) {
   System.out.println(list[i].getName() + "  |  "
     + list[i].getAbsolutePath());
  }

  return "SD卡存储信息:总空间->"
    + Formatter.formatFileSize(getBaseContext(), totalBlocks
      * blockSize)
    + "  剩余空间:"
    + Formatter.formatFileSize(getBaseContext(), availableBlocks
      * blockSize);
 }

 
 /**
  * 获取外部扩展存储卡信息，  可能会有问题
  * @return
  */
 private String getOutSdkMessage() {
  /** 获取存储卡路径 */
  File sdcardDir = new File("/mnt");
  File[] list = sdcardDir.listFiles();
  String path=null;
  for (int i = 0; i < list.length; i++) {
   if (list[i].isDirectory()) {
    if (list[i].getName().toLowerCase().contains("ext")
      && list[i].getName().toLowerCase().contains("sd")) {
     path=list[i].getAbsolutePath();
     break;
    }
   }
  }
  
  if(path==null){
   return "不存在外部扩展卡";
  }
  
  /** StatFs 看文件系统空间使用情况 */
  StatFs statFs = new StatFs(path);
  /** Block 的 size */
  long blockSize = statFs.getBlockSize();
  /** 总 Block 数量 */
  long totalBlocks = statFs.getBlockCount();
  /** 已使用的 Block 数量 */
  long availableBlocks = statFs.getAvailableBlocks();

  return "外部存储卡:总空间->"
    + Formatter.formatFileSize(getBaseContext(), totalBlocks
      * blockSize)
    + "  剩余空间:"
    + Formatter.formatFileSize(getBaseContext(), availableBlocks
      * blockSize);
 }

}