Unity3D研究院之实时获取手机电流、电压、计算功率发热（一百一十八）

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using UnityEngine;

public class NewBehaviourScript : MonoBehaviour

{

    float e = 0;

    private void OnGUI()

    {

        GUILayout.Label(string.Format($"<size=80>电池总容量{Power.capacity}毫安,电压{Power.voltage}伏</size>"));

        GUILayout.Label(string.Format($"<size=80>实时电流{e}毫安,实时功率{(int)(e * Power.voltage)},满电量能玩{((Power.capacity /e).ToString("f2"))}小时</size>"));

    }

    float t = 0f;

    private void Update()

    {

        if(Time.time - t > 1f)

        {

            t = Time.time;

            e = Power.electricity;

        }

    }

}

public class Power

{

    static public float electricity

    {

        get {

#if UNITY_ANDROID

            //获取电流（微安），避免频繁获取，取一次大概2毫秒

            float electricity = (float)manager.Call<int>("getIntProperty", PARAM_BATTERY);

            //小于1W就认为它的单位是毫安，否则认为是微安

            return ToMA(electricity);

#else

            return -1f;

#endif

        }

    }

    //获取电压 伏

    static public float voltage { get; private set; }

    //获取电池总容量 毫安

    static public int capacity { get; private set; }

    //获取实时电流参数

    static object[] PARAM_BATTERY = new object[] { 2 }; //BatteryManager.BATTERY_PROPERTY_CURRENT_NOW)

    static AndroidJavaObject manager;

    static Power()

    {

#if UNITY_ANDROID

        AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");

        AndroidJavaObject currActivity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");

        manager = currActivity.Call<AndroidJavaObject>("getSystemService", new object[] { "batterymanager" });

        capacity = (int)(ToMA((float)manager.Call<int>("getIntProperty", new object[] { 1 })) / ((float)manager.Call<int>("getIntProperty", new object[] { 4 })/100f));   //BATTERY_PROPERTY_CHARGE_COUNTER 1 BATTERY_PROPERTY_CAPACITY 4

        AndroidJavaObject receive = currActivity.Call<AndroidJavaObject>("registerReceiver", new object[] { null,new AndroidJavaObject("android.content.IntentFilter", new object[] { "android.intent.action.BATTERY_CHANGED" }) });

        if (receive != null)

        {  

            voltage = (float)receive.Call<int>("getIntExtra", new object[] { "voltage",0 })/1000f; //BatteryManager.EXTRA_VOLTAGE

        }

#endif

    }

    static float ToMA(float maOrua)

    {

        return maOrua < 10000 ? maOrua : maOrua / 1000f;

    }

}