Unity 中的回调侦听器 - 如何从 Android 中的 UnityPlayerActivity 调用脚本文件方法

Question

我有一个android库项目，并在Unity项目中导入了库项目。现在，我想在 Unity 项目中实现一个回调，它将根据 android 库项目给出的响应执行。我的意思是说，从 UnityPlayerActivity（Android 项目）调用脚本文件方法。

目前我正在使用以下代码行，但没有任何反应：

UnityPlayer.UnitySendMessage("Main Camera","showMessage",errorMessage);

Main Camera 是我的游戏对象。 showMessage 是脚本文件中的消息名称。 Message 是通过 Android Activity 显示在 Unity 中的消息。

请检查我下面的代码 Unity 脚本文件和 Android Activity。

Unity 脚本文件：

using UnityEngine;
using System.Collections;

public class scriptfile : MonoBehaviour {

    // Use this for initialization
    void Start () {


        AndroidJavaClass jc = new AndroidJavaClass("com.unity3d.player.UnityPlayer"); 
        AndroidJavaObject jo = jc.GetStatic<AndroidJavaObject>("currentActivity"); 
        jo.Call("shareText","236","236");
    }

    void showMessage(string message){
        print ("hello");
        Debug.Log ("hello");
    } 
}

Android 文件 UnityPlayerActivity：

/**
 * Created by CH-E01073 on 28-09-2015.
 */
public class MainAct extends UnityPlayerActivity implements RegistrationListener,BOffersListener {
    Context context;
    SharedPreferences prefs ;
    String AppIds="";
    String PublisherIDs="";
     public void shareText(String AppId,String PublisherID) {
       context=MainAct.this;
        prefs = PreferenceManager
               .getDefaultSharedPreferences(context);
       Log.e("AppID", AppId);
       Log.e("PublisherID",PublisherID);

        AppIds=AppId;
        PublisherIDs=PublisherID;

         runOnUiThread(new Runnable() {
             @Override
             public void run() {
                 UnityPlayer.UnitySendMessage("Main Camera","showMessage","Start UI Thread");
                 if (prefs.getString(FreeBConstants.ID, null) == null
                         || prefs.getString(FreeBConstants.ID, null).equals("")
                         || !Build.VERSION.RELEASE.equals(prefs.getString(
                         FreeBConstants.VERSION, null))
                         || !FreeBCommonUtility.getDeviceId(context).equals(
                         (prefs.getString(FreeBConstants.DEVICE_ID, null)))) {
                BSDKLogger.enableLogging(true);
                SDKRegistration.initialize(MainAct.this, getApplicationContext(), AppIds,PublisherIDs);
                 }else{

                Offers Offers = new Offers(MainAct.this);
                 Offers.setOnFreeBOffersListener(MainAct.this);
                 Offers.setTitle(
                         "Pick Any Offer to unlock your premium features",
                         "#FFFFFF", "#FF6D00");
                 }
         }
         });



    }

    @Override
    public void onOffersLoaded(String code,String freeBOffers) {
        CommonUtility.showToast(getApplicationContext(), code);
        UnityPlayer.UnitySendMessage("Main Camera","showMessage",freeBOffers);
    }

    @Override
    public void onShowOffers() {

         UnityPlayer.UnitySendMessage("Main Camera","showMessage","Show Offers");
    }

    @Override
    public void noOfferInstalled(String s, String s2) {
    }

    @Override
    public void onLeaveApplication(String s, String s2) {
    }

    @Override
    public void onDialogDismiss(String s) {
    }

    @Override
    public void onOffersFailed(String code, String errorMessage) {

        FreeBCommonUtility.showToast(getApplicationContext(), errorMessage);
        UnityPlayer.UnitySendMessage("Main Camera","showMessage",errorMessage);
    }

    @Override
    public void onOffersInstallSuccess(String code, String errorMessage) {
         FreeBCommonUtility.showToast(getApplicationContext(), errorMessage);
    }

    @Override
    public void onOffersInstallFailure(String code, String errorMessage) {
         FreeBCommonUtility.showToast(getApplicationContext(), errorMessage);
    }


    @Override
    public void onRegistrationFailed(String code, String errorMessage) {
        FreeBCommonUtility.showToast(getApplicationContext(), errorMessage);
        UnityPlayer.UnitySendMessage("Main Camera","showMessage",errorMessage);
    }

    @Override
    public void onRegistrationSuccess(String code, String errorMessage) {
      // FreeBCommonUtility.showToast(getApplicationContext(), errorMessage);
        Log.e("SUCCESS", errorMessage);
        // TODO Auto-generated method stub
        UnityPlayer.UnitySendMessage("Main Camera","showMessage",errorMessage);

        Offers Offers = new Offers(MainAct.this);
        Offers.setOnFreeBOffersListener(MainAct.this);
       Offers.setTitle(
             "Pick Any Offer to unlock your premium features",
              "#FFFFFF", "#FF6D00");
    }
}

谁能帮我解决这个问题？

Answer 1

另一种选择是使用 AndroidJavaProxy 实现接口回调。除了使用 UnitySendMessage，您可以简单地在 Java 代码中使用接口回调，然后使用 AndroidJavaProxy 在 C# 中实现此接口，并将其传递给 Java 方法以接收返回的消息。

创建您的 Java 界面：

package com.example.android;
public interface PluginCallback {
    public void onSuccess(String videoPath);
    public void onError(String errorMessage);
}

调用传入的监听器/回调函数返回消息

public void myPluginMethod(PluginCallback callback) {
    // Do something
    callback.onSuccess("onSuccess");
    // Do something horrible
    callback.onError("onError");
}

用C#实现接口

class AndroidPluginCallback : AndroidJavaProxy
    {
        public AndroidPluginCallback() : base("com.example.android.PluginCallback") { }

        public void onSuccess(string videoPath) {
            Debug.Log("ENTER callback onSuccess: " + videoPath);
        }
        public void onError(string errorMessage)
        {
            Debug.Log("ENTER callback onError: " + errorMessage);
        }
    }

将 C# 接口传递给 Java 方法

AndroidJavaObject pluginClass = new     AndroidJavaObject("com.example.android.MyPlugin");
pluginClass.Call("myPluginMethod", new AndroidPluginCallback());

Answer 2

我相信您只能从主线程调用 UnitySendMessage() - 至少在上述一种情况下，您是从 Android UI 工作线程调用它。

作为一个快速的健全性测试，请尝试在您的 shareText() 函数顶部调用它。