从 Unity3D 代码启动 android 服务 [英] Start android service from Unity3D code

问题描述

在我的 Unity3D 应用程序中，我需要启动一个服务，该服务将在后台运行.我不知道我该怎么做.必须在活动上调用方法 startService()，但我不知道如何将当前的统一活动从统一脚本传递到我的 android 插件.而且我还没有找到任何方法以静态方法获取活动并在其中运行 startService().

In my Unity3D application for android I need to start a service, which will run in background. I can't figure it out how can I do it. The method startService() has to be invoked on an activity, but I do not know how to pass the current unity activity from unity script to my android plugin. And I haven't found any way to get the activity in a static method and run startService() in it.

据我所知，我需要获取主要的 Unity3D 活动并从中启动服务.

As far as I understand the sequence, I need to get main Unity3D activity and start the service from it.

我的班级应该调用服务.

My class which is supposed to call the service.

public final class StatusCheckStarter {

    public static void StartCheckerService()
    {
        startService(new Intent(this, CheckService.class));
    }
}

此代码不起作用，因为无法解析方法 startService"而我没有什么可传入 this 参数.我需要获取当前活动.

This code does not work, because "Cannot resolve method startService" and I have nothing to pass in this argument. I need to get the current activity.

推荐答案

以下是两种发送Activity实例/引用到不使用的Java插件的方法onCreate 函数或从 UnityPlayerActivity 扩展.

Below are two ways to send Activity instance/reference to Java plugin that doesn't use the onCreate function or extend from UnityPlayerActivity.

方法 1:发送 Activity 引用一次，然后将其存储在 Java 中的静态变量中以供重复使用:

Method 1: Send Activity reference once then store it in a static variable in Java for re-usual:

Java:

public final class StatusCheckStarter {

    static Activity myActivity;

    // Called From C# to get the Activity Instance
    public static void receiveActivityInstance(Activity tempActivity) {
        myActivity = tempActivity;
    }

    public static void StartCheckerService() {
        myActivity.startService(new Intent(myActivity, CheckService.class));
    }
}

C#:

AndroidJavaClass unityClass;
AndroidJavaObject unityActivity;
AndroidJavaClass customClass;

void Start()
{
    //Replace with your full package name
    sendActivityReference("com.example.StatusCheckStarter");

   //Now, start service
   startService();
}

void sendActivityReference(string packageName)
{
    unityClass = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
    unityActivity = unityClass.GetStatic<AndroidJavaObject>("currentActivity");
    customClass = new AndroidJavaClass(packageName);
    customClass.CallStatic("receiveActivityInstance", unityActivity);
}

void startService()
{
    customClass.CallStatic("StartCheckerService");
}

方法2:在每个函数调用中发送Activity引用.

Method 2: Send Activity reference in each function call.

Java:

public final class StatusCheckStarter {

    public static void StartCheckerService(Activity tempActivity) {
        tempActivity.startService(new Intent(tempActivity, CheckService.class));
    }
}

C#:

void Start()
{
    //Replace with your full package name
    startService("com.example.StatusCheckStarter");
}

void startService(string packageName)
{
    AndroidJavaClass unityClass = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
    AndroidJavaObject unityActivity = unityClass.GetStatic<AndroidJavaObject>("currentActivity");
    AndroidJavaClass customClass = new AndroidJavaClass(packageName);
    customClass.CallStatic("StartCheckerService", unityActivity);
}

注意:您必须用 StatusCheckStarter 类的完整包替换 com.example.StatusCheckStarter.

Note: You must replace com.example.StatusCheckStarter with the full package of your StatusCheckStarter class.

这篇关于从 Unity3D 代码启动 android 服务的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！