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