Unity与Android的交互

首先新建一个android工程

 

包名与unity的包名相同

比如我这里叫com.example.myjavatest好了

然后引入Unity的classes.jar包

 

classes.jar包在Unity安装目录\Editor\Data\PlaybackEngines\AndroidPlayer\Variations\mono\Development\Classes

我们的android的主Activity必须继承UnityPlayerActivity，例子如下

package com.example.myjavatest; import android.content.Context;import android.os.Bundle; import com.unity3d.player.UnityPlayer;import com.unity3d.player.UnityPlayerActivity;  public class HelloActivity extends UnityPlayerActivity{Context m_context = null;    @Override    protected void onCreate(Bundle savedInstanceState)    {        super.onCreate(savedInstanceState);        m_context = this;    }     public void OnUnityCall(String name)    {    UnityPlayer.UnitySendMessage("JavaMsgRecver", "OnJavaMsg","hello,I got your msg:"+name);    }}

然后把android工程的src也就是代码部分Export成一个jar包

 

 

把生成的jar包丢到Unity工程中的Plugins/Android/bin目录下

注意吧AndroidManifest.xml也搞过去，要稍微改一下，例：

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.myjavatest"    android:versionCode="1"    android:versionName="1.0" >     <uses-sdk        android:minSdkVersion="8"        android:targetSdkVersion="21" />     <application        android:icon="@drawable/app_icon"        android:label="@string/app_name"        android:debuggable="false"        android:allowBackup="false">        <activity            android:name=".HelloActivity"            android:label="@string/app_name"            android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen"            android:launchMode="singleTop"android:screenOrientation="landscape" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>               </application> </manifest>

然后在Unity中创建一个叫JavaMsgRecver的GameObject，挂上如下脚本

 

using UnityEngine; public class Startup : MonoBehaviour {void Start ()    {        Debug.Log("Startup");         using (AndroidJavaClass jc = new AndroidJavaClass("com.unity3d.player.UnityPlayer"))        {            Debug.Log("get AndroidJavaClass");            using (AndroidJavaObject jo = jc.GetStatic<AndroidJavaObject>("currentActivity"))            {                Debug.Log("get AndroidJavaObject Begin");                jo.Call("OnUnityCall", "I am Unity");                Debug.Log("get AndroidJavaObject End");            }        }}     public void OnJavaMsg(string msg)    {        Debug.Log("OnJavaMsg");        Debug.Log(msg);}}

运行效果如下

搞定，哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈

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华丽丽分割线

补充：如果不需要跟主Activity的对象进行交互，那么，就不用继承UnityPlayerActivity啦，包名也不用跟Unity工程的包名相同，在Java中写好静态接口，然后导成jar包，在C#中直接用AndroidJavaClass调用静态接口即可

例：

using(AndroidJavaClass jc = new AndroidJavaClass("com.lxf.myjava")){jc.CallStatic("OnUnityCall","I am Unity!");}