Unity接入安卓sdk查看应用内存占用

注：若不清楚如何在unity中接入android sdk可先了解下相关流程。项目地址：http://download.csdn.net/download/yhuangher/9976564

在项目后期进行内存优化，在android端进行内存优化时做了若干辅助工具，比如此款，查看系统总内存，当前App占用内存，系统剩余内存及fps，如图示：

android端代码如下：

package com.JohnRey.ShowAppBaseInfo;import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.List;import android.annotation.SuppressLint;
import android.app.ActivityManager;
import android.content.Context;
import android.os.Bundle;
import android.os.Debug;
import android.text.format.Formatter;import com.unity3d.player.UnityPlayerActivity;public class MainActivity extends UnityPlayerActivity {private ActivityManager mActivityManager = null;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);mActivityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);}public String getMemoryInfo() {// 系统总内存String message = getTotalMemory();// 系统可用内存message += "-" + getAvailMemory();// 当前App占用的内存message += "-" + getCurrentProcessMemory();return message;}/*** 获取当前app占用内存* * @return*/@SuppressLint("NewApi")private String getCurrentProcessMemory() {String pkgName = this.getPackageName();List<ActivityManager.RunningAppProcessInfo> appList = mActivityManager.getRunningAppProcesses();for (ActivityManager.RunningAppProcessInfo appInfo : appList) {if (appInfo.processName.equals(pkgName)) {int[] pidArray = new int[] { appInfo.pid };Debug.MemoryInfo[] memoryInfo = mActivityManager.getProcessMemoryInfo(pidArray);float temp = (float) memoryInfo[0].getTotalPrivateDirty() / 1024.0f;return String.format("%.2f", temp)+"MB";}}return "获取失败";}/*** 获取手机总可用内存大小* * @return*/private String getTotalMemory() {String str1 = "/proc/meminfo";// 系统内存信息文件
         String str2;String[] arrayOfString;try {FileReader localFileReader = new FileReader(str1);BufferedReader localBufferedReader = new BufferedReader(localFileReader, 8192);str2 = localBufferedReader.readLine();// 读取meminfo第一行，系统总内存大小
arrayOfString = str2.split("\\s+");localBufferedReader.close();float temp = Integer.valueOf(arrayOfString[1])/1048576.0f;return String.format("%.2f", temp)+"GB";} catch (IOException e) {return "获取失败";}}/*** 获取系统可用内存信息* * @return*/private String getAvailMemory() {ActivityManager.MemoryInfo mi = new ActivityManager.MemoryInfo();mActivityManager.getMemoryInfo(mi);// 转化为mbreturn Formatter.formatFileSize(this, mi.availMem);}
}

C#端代码如下：

using UnityEngine;
using System.Collections;public class FPS : MonoBehaviour
{public float updateInterval = 0.5F;private float accum = 0; private int frames = 0;private float timeleft;void Start(){timeleft = updateInterval;
#if UNITY_ANDROID_getJavaObject();Invoke("callAndroid", 2);
#endif}void Update(){_updateFPS();}#region FPS显示private float fps;[Range(0, 150)]public int MaxFPS;private string _curFPS;private void _updateFPS(){timeleft -= Time.deltaTime;//timescale是时间速度，为1时即为正常速度，为2时即为两倍速，为0时即为暂停accum += Time.timeScale / Time.deltaTime;++frames;if (timeleft <= 0.0){fps = accum / frames;_curFPS = "FPS:" + fps;timeleft = updateInterval;accum = 0.0F;frames = 0;}}#endregion#region CallAndroidprivate string _memoryInfo;private AndroidJavaObject ajo;
#if UNITY_ANDROIDprivate void callAndroid(){_memoryInfo = string.Empty;string result = ajo.Call<string>("getMemoryInfo");string[] strArray = result.Split('-');//系统总内存_memoryInfo += "系统内存:" + strArray[0] + "\n";//系统可用内存_memoryInfo += "可用内存:" + strArray[1] + "\n";//App占用内存_memoryInfo += "app占用内存:" + strArray[2] + "\n";////系统分配的最大占用内存//_memoryInfo += "AllotMemory:" + strArray[3];//加入代码之后，可能会每隔两秒钟出现卡顿现象Invoke("callAndroid", 2);}private void _getJavaObject(){AndroidJavaClass cls_UnityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");ajo = cls_UnityPlayer.GetStatic<AndroidJavaObject>("currentActivity");}
#endif#endregionvoid OnGUI(){GUIStyle style = new GUIStyle();style.fontSize = 20;style.normal.textColor = Color.green;GUI.Label(new Rect(Screen.width - 300, 10, 250, 200), _memoryInfo, style);style.normal.textColor = fps > MaxFPS ? Color.red : Color.green;GUI.Label(new Rect(Screen.width - 200, Screen.height - 50, 100, 30), _curFPS, style);}
}