Unity 调用Android回调

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

public class AndroidUsbPermission {

	private static AndroidUsbPermission m_instance = null;
	public static AndroidUsbPermission GetInstance() {
		if (m_instance == null)
		{
			m_instance = new AndroidUsbPermission();
		}
		return m_instance;
	}
	private AndroidUsbPermission() {
		initAndroid();
	}

#region usb permissions
	private bool m_permissionOK = false;
	AndroidJavaObject m_usbPermissionManager = null;
	private const int Vive_VendorId = 0x28de;
	private const int Vive_Tracker_ProductId = 0x2300;//tracker、controller直连
	private const int Vive_Dongle_ProductId = 0x2101;//dongle的产品号
	private void initAndroid()
	{
		AndroidJavaClass usb_ajc = new AndroidJavaClass("com.lt.usbhostmanager.UsbHostPermissionManager");
		if (usb_ajc != null)
		{
			m_usbPermissionManager = usb_ajc.CallStatic("getInstance");
			m_usbPermissionManager.Call("setActivity", getUnityActivity());
		}
	}

	private int usb_ret = -99;
	private List m_trackerFds = new List();
	private List m_dongleFds = new List();
	public void requestUsbHostPermission()
	{
		if (m_usbPermissionManager == null)
		{
			return;
		}
		m_permissionOK = false;
		m_totalUsbNum = 0;
		m_trackerFds.Clear();
		m_dongleFds.Clear();
		usb_ret = m_usbPermissionManager.Call("requestPermissions", Vive_VendorId, Vive_Tracker_ProductId, Vive_Dongle_ProductId, new UsbNumCallback(setTotalUsbNumFromAndroid), new UsbPermissionCallback(setUsbPermissionFromAndroid));
	}

	private void doToast(string msg)
	{
		if (m_usbPermissionManager == null)
		{
			return;
		}
		m_usbPermissionManager.Call("doToast", msg);
	}

	private AndroidJavaObject getUnityActivity()
	{
		//unity的manifest文件路径
		//C:Program FilesUnity2018.2.3f1EditorDataPlaybackEnginesAndroidPlayerApk

		//获取unity activity
		//通过报名获取java class
		AndroidJavaClass unityClass = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
		//获取当前的activity
		AndroidJavaObject unityActivity = unityClass.GetStatic("currentActivity");

		return unityActivity;
	}

	private class UsbNumCallback : AndroidJavaProxy
	{
		private UnityAction unity_callback;

		public UsbNumCallback(UnityAction unity_callback) : base(new AndroidJavaClass("com.lt.usbhostmanager.UsbNumCallback"))
		{
			this.unity_callback = unity_callback;
		}
		public void onCallback(int totalNum)
		{
			if (unity_callback != null)
			{
				unity_callback(totalNum);
			}
		}
	}
	private class UsbPermissionCallback : AndroidJavaProxy
	{
		private object m_obj = new object();
		private UnityAction unity_callback;

		public UsbPermissionCallback(UnityAction unity_callback) : base(new AndroidJavaClass("com.lt.usbhostmanager.UsbPermissionCallback"))
		{
			this.unity_callback = unity_callback;
		}
		public void onCallback(int vendorId, int productId, int fd, bool result)
		{
			lock (m_obj)
			{
				if (unity_callback != null)
				{
					unity_callback(vendorId, productId, fd, result);
				}
			}
		}
	}

	private int m_totalUsbNum;
	private void setTotalUsbNumFromAndroid(int totalNum)
	{
		m_totalUsbNum = totalNum;
	}
	private void setUsbPermissionFromAndroid(int vendorId, int productId, int fd, bool result)
	{
		if (result)
		{
			if (vendorId == Vive_VendorId)
			{
				if (productId == Vive_Tracker_ProductId)
				{
					m_trackerFds.Add(fd);
				}
				else if (productId == Vive_Dongle_ProductId)
				{
					m_dongleFds.Add(fd);
				}
			}
		}
		//响应数等于usb设备数，可以进行读数据，这里是异步所以只设置标记
		if (m_trackerFds.Count + m_dongleFds.Count == m_totalUsbNum)
		{
			m_permissionOK = true;
		}
	}

	public bool IsPermissionOK()
	{
		return m_permissionOK;
	}
	public int[] getTrackerFds()
	{
		return m_trackerFds.ToArray();
	}
	public int[] getDongleFds()
	{
		return m_dongleFds.ToArray();
	}

	public string getDebug()
	{
		string msg_android = "usb_ret=" + usb_ret + "n";
		msg_android += "totalUsbNum:" + m_totalUsbNum + "n";
		//
		string tracker_fd_msg = "tracker fds: ";
		for (int k = 0; k < m_trackerFds.Count; k++)
		{
			tracker_fd_msg += m_trackerFds[k] + ", ";
		}
		tracker_fd_msg += "n";
		msg_android += tracker_fd_msg;

		//
		string dongle_fd_msg = "dongle fds: ";
		for (int k = 0; k < m_dongleFds.Count; k++)
		{
			dongle_fd_msg += m_dongleFds[k] + ", ";
		}
		dongle_fd_msg += "n";
		msg_android += dongle_fd_msg;

		//
		return msg_android;
	}
	#endregion




	https://blog.csdn.net/osuckseed/article/details/101302796
	//string[] permissions = new string[] {
	//	"android.permission.INTERNET",
	//	"android.permission.READ_PHONE_STATE",
	//	"android.permission.READ_EXTERNAL_STORAGE",
	//	"android.permission.WRITE_EXTERNAL_STORAGE",
	//	"android.permission.ACCESS_WIFI_STATE",
	//	"android.permission.ACCESS_NETWORK_STATE",
	//	"android.permission.GET_TASKS",
	//	"android.permission.REQUEST_INSTALL_PACKAGES",
	//	"android.permission.WAKE_LOCK",
	//	"android.permission.SYSTEM_ALERT_WINDOW",
	//	"android.permission.CHANGE_WIFI_STATE",
	//	"android.permission.CHANGE_NETWORK_STATE",
	//	"android.permission.ACCESS_COARSE_LOCATION",
	//	"android.permission.ACCESS_FINE_LOCATION",
	//	"android.permission.SYSTEM_OVERLAY_WINDOW",
	//	"android.permission.ACCESS_COARSE_UPDATES",
	//	"android.permission.WRITE_SETTINGS",
	//	"android.permission.BATTERY_STATS",
	//	"android.permission.MOUNT_UNMOUNT_FILESYSTEMS"
	//};

}