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）

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;
    }
}