/** 手机总内存 */

     private String getTotalMemory() {

         // 系统内存信息文件

         String str1 = "/proc/meminfo";

         String str2;

         String[] arrayOfString;

         long initial_memory = 0;

         try {

             FileReader localFileReader = new FileReader(str1);

             BufferedReader localBufferedReader = new BufferedReader(

                     localFileReader, 8192);

             // 读取meminfo第一行，系统总内存大小

             str2 = localBufferedReader.readLine();

             arrayOfString = str2.split("\\s+");

             for (String num : arrayOfString) {

                 Log.i(str2, num + "\t");

             }

             // 获得系统总内存，单位是KB，乘以1024转换为Byte

             initial_memory = Integer.valueOf(arrayOfString[1]).intValue() * 1024;

             localBufferedReader.close();

         } catch (IOException e) {

         }

         // Byte转换为KB或者MB，内存大小规格化

         return Formatter.formatFileSize(getBaseContext(), initial_memory);

     }

 /** 获取android当前可用内存大小 */

     private String getAvailMemory() {

         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

         // 将获取的内存大小规格化

         return Formatter.formatFileSize(getBaseContext(), mi.availMem);

     }

 /** Android获取应用所占内存大小 */

 2 private void getRunningAppProcessInfo() {

   ActivityManager mActivityManager = (ActivityManager) getSystemService(

       Context.ACTIVITY_SERVICE);

    // 获得系统里正在运行的所有进程

    List<RunningAppProcessInfo> runningAppProcessesList = mActivityManager

         .getRunningAppProcesses();

    for (RunningAppProcessInfo runningAppProcessInfo : runningAppProcessesList) {

       // 进程ID号

       int pid = runningAppProcessInfo.pid;

       // 用户ID

       int uid = runningAppProcessInfo.uid;

       // 进程名

       String processName = runningAppProcessInfo.processName;

       // 占用的内存

       int[] pids = new int[] { pid };

       Debug.MemoryInfo[] memoryInfo = mActivityManager

              .getProcessMemoryInfo(pids);

       int memorySize = memoryInfo[0].dalvikPrivateDirty;

       Log.i(TAG, "processName=" + processName + ",pid=" + pid + ",uid="

             + uid + ",memorySize=" + memorySize + "kb");

     }

 }

 /**

   * 获取单个 app 内存限制大小

   * 返回以 M 为单位的数字，

   * 可能在不同的平台或者设备上值都不太一样

  */

  private void test01() {

    ActivityManager activityManager2 = (ActivityManager) getSystemService(

       Context.ACTIVITY_SERVICE);

    activityManager2.getMemoryClass();

  }