Unity与Android交互实现

主要参考了这篇文章：

Unity与Android交互方案优化版

链接：https://www.jianshu.com/p/86b275da600e

自己的实现(unity获取内存和温度)：

android端：

 package com.jing.unity;
 import android.app.Activity;
 import android.app.ActivityManager;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.hardware.Sensor;
 import android.hardware.SensorEvent;
 import android.hardware.SensorEventListener;
 import android.hardware.SensorManager;
 import android.os.Debug;
 // 当前电池温度
 import static android.os.BatteryManager.EXTRA_TEMPERATURE;

 /**
  * Created by Jing on 2018-1-18.
  */
 public class Unity2Android {

     /**
      * unity项目启动时的的上下文
      */
     private Activity _unityActivity=null;
     private SensorManager mSensorManager = null;
     private Sensor mSensor = null;
     ActivityManager mActivityManager=null;
     private float temperature = 0;
     private float memory=0;

     /**
      * 获取unity项目的上下文
      *
      * @return
      */

     public void Init() {
         if (_unityActivity == null) {
             try {
                 Class<?> classtype = Class.forName("com.unity3d.player.UnityPlayer");
                 Activity activity = (Activity) classtype.getDeclaredField("currentActivity").get(classtype);
                 _unityActivity = activity;
             } catch (ClassNotFoundException e) {

             } catch (IllegalAccessException e) {

             } catch (NoSuchFieldException e) {

             }
         }
         mActivityManager = (ActivityManager) _unityActivity.getSystemService(Context.ACTIVITY_SERVICE);
         /*获取系统服务（SENSOR_SERVICE）返回一个SensorManager对象*/
         mSensorManager = (SensorManager) _unityActivity.getSystemService(Context.SENSOR_SERVICE);
         /*通过SensorManager获取相应的（温度传感器）Sensor类型对象*/
         mSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_AMBIENT_TEMPERATURE);
         if (mSensor != null) {
             mSensorManager.registerListener(mSensorEventListener, mSensor
                     , SensorManager.SENSOR_DELAY_NORMAL);
         }
         else
         {
             startBroadCast();
         }
     }

     public void Destroy() {
         if (mSensor != null) {
             mSensorManager.unregisterListener(mSensorEventListener, mSensor);
         }
         else
         {
             stopBroadCast();
         }
     }

     private void startBroadCast() {
         IntentFilter filter = new IntentFilter();
         filter.addAction(Intent.ACTION_BATTERY_CHANGED);
         _unityActivity.registerReceiver(mBroadcastReceiver, filter);
     }

     private void stopBroadCast() {
         _unityActivity.unregisterReceiver(mBroadcastReceiver);
     }

     /*声明一个SensorEventListener对象用于侦听Sensor事件，并重载onSensorChanged方法*/
     private final SensorEventListener mSensorEventListener = new SensorEventListener() {

         @Override
         public void onSensorChanged(SensorEvent event) {
             if (event.sensor.getType() == Sensor.TYPE_AMBIENT_TEMPERATURE) {
                 /*温度传感器返回当前的温度，单位是摄氏度（°C）。*/
                 temperature = event.values[0];
             }
         }

         @Override
         public void onAccuracyChanged(Sensor sensor, int accuracy) {
             // TODO Auto-generated method stub

         }
     };

     public float GetTemperature() {
         return temperature;
     }

     public float GetMemory() {
         try {
             int pid = android.os.Process.myPid();
             Debug.MemoryInfo[] memoryInfoArray = mActivityManager.getProcessMemoryInfo(new int[]{pid});
             memory = (float) memoryInfoArray[0].getTotalPss()/ 1024.0f;
         } catch (Exception e) {
         }
         return memory;
     }

     private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {

         @Override
         public void onReceive(Context context, Intent intent) {
             if (null == intent) {
                 return;
             }
             String action = intent.getAction();

             if (Intent.ACTION_BATTERY_CHANGED.equals(action)) {
                 temperature = intent.getIntExtra(EXTRA_TEMPERATURE, -1)/10.0f;
             }
         }
     };
 }

unity端：

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;

 public class ShowGUI : MonoBehaviour {
     private float memory=0;
     private float temperature=0;
     private AndroidJavaObject jo;
     // Use this for initialization
     void Start () {
         jo = new AndroidJavaObject("com.jing.unity.Unity2Android");
         jo.Call("Init");//初始化监听
     }

     float GetMemory()
     {
         float m=jo.Call<float>("GetMemory");
         return m;
     }

     float GetTemperature()
     {
         float m=jo.Call<float>("GetTemperature");
         return m;
     }

     void OnDestroy()
     {
         jo.Call("Destroy");//结束监听
     }

     void OnGUI()
     {
         GUIStyle labStyle=new GUIStyle();
         labStyle.fontSize=100;
         labStyle.normal.textColor=Color.red;

         if(GUILayout.Button("获取当前值",GUILayout.MaxWidth(200),GUILayout.MaxHeight(100)))
         {
             memory=GetMemory();
             temperature=GetTemperature();
         }

         GUILayout.Label("memory="+memory.ToString(),labStyle);
         GUILayout.Label("temperature="+temperature.ToString(),labStyle);

     }
 }

值得注意的一点，导出的arr包得改一下sdk的 min version和target version,与unity统一，不然会报错。

如果想导出jar包，打开该类库下的build.gradle,在dependencies后添加以下代码

task makeJar(type:Copy) {
    delete 'build/outputs/test.jar'
    from('build/intermediates/intermediate-jars/release/')//jar文件来源，这个吧我坑的，早期版本是'build/intermediates/bundles/release/'
    into('build/libs/')   //生成路径
    include('classes.jar')
    rename('classes.jar','test.jar')  //命名为test.jar
}

makeJar.dependsOn(build)

然后View-ToolWindow-Gradle，点左上同步，然后拉到other->makeJar即可