AndroidStudio导出aar文件给Unity使用

本文参考 ：http://www.devacg.com/?post=548

Demo地址：https://github.com/JulyNine/AndroidToUnity

一、用Android Studio创建个空工程 注意：包名要与Unity中工程的包名不一致，不然打包时会报错multi dex

二、把classes.jar拷到libs下

C:\Soft\UnityHub\2019.2.0f1\Editor\Data\PlaybackEngines\AndroidPlayer\Variations\mono\Release\Classes\classes.jar（自己Unity安装路径）
拷到
C:\Users\July\AndroidStudioProjects\Fakemiss\app\libs\classes.jar（新建的android工程路径）

注意：以上是我的安装目录和工程目录。

三、把classes.jar添加进Dependencies

四、删除res下多余的资源(重要，不然打包的时候会报错：link resource error)

删除layout文件夹 以及values文件夹下的style.xml

五、修改build.gradle文件才能生成aar

修改后的文件

//apply plugin: 'com.android.application'
apply plugin: 'com.android.library'android {compileSdkVersion 25buildToolsVersion "25.0.2"defaultConfig {//applicationId "com.zwwx.game.gamesupport"minSdkVersion 15targetSdkVersion 25versionCode 1versionName "1.0"testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"}buildTypes {release {minifyEnabled falseproguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'}}
}dependencies {compile fileTree(include: ['*.jar'], dir: 'libs')androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {exclude group: 'com.android.support', module: 'support-annotations'})compile 'com.android.support:appcompat-v7:25.3.1'compile 'com.android.support.constraint:constraint-layout:1.0.2'testCompile 'junit:junit:4.12'compile files('libs/classes.jar')
}

六、修改AndroidManifest.xml

修改后的文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"package="com.zwwx.game.gamesupport"><uses-permission android:name="android.permission.INTERNET"></uses-permission><applicationandroid:allowBackup="true"android:icon="@mipmap/ic_launcher"android:label="@string/app_name"android:roundIcon="@mipmap/ic_launcher_round"android:supportsRtl="true"android:theme="@android:style/Theme.NoTitleBar"><activity android:name=".MainActivity"><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter><meta-data android:name="unityplayer.UnityActivity" android:value="true" /></activity></application>
</manifest>

 

七、修改MainActivity.java

package com.zwwx.game.gamesupport;import android.os.Bundle;
import android.widget.Toast;
import com.unity3d.player.UnityPlayerActivity;public class MainActivity extends UnityPlayerActivity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);}// 显示Toast消息public void ShowToast(final String message){runOnUiThread(new Runnable() {@Overridepublic void run() {Toast.makeText(getApplicationContext(), message, Toast.LENGTH_LONG).show();}});}
}

 八、生成arr

九、删除arr文件libs下的classes.jar(特别注意别删错了，是libs文件夹下的classes.jar,不是根目录下的)

十、把aar和AS工程中的AndroidManifest.xml拷到Unity工程下

十一、创建test.cs

using UnityEngine;
public class Test : MonoBehaviour {void OnGUI(){if (GUI.Button(new Rect(200, 200, 200, 100), "Show Toest - Hello World!")){AndroidHelper.Call("ShowToast", "Hello World!");}}
}

十二、设置好Player Settings，然后打包测试

十三、最后赠送一个Unity中调用java方法的辅助工具类

using System.Collections;
using System;
using System.Collections.Generic;
using UnityEngine;
/// <summary>
/// 与Android交互的辅助类
/// </summary>
public class AndroidHelper
{#if UNITY_ANDROID && !UNITY_EDITOR#region 获得主活动类public static AndroidJavaClass MainActivity{get{try{AndroidJavaClass player = new AndroidJavaClass("com.unity3d.player.UnityPlayer");return player;}catch (Exception){return null;}}}#endregion#region 获得当前Android活动public static AndroidJavaObject currentActivity{get {try{AndroidJavaObject context = MainActivity.GetStatic<AndroidJavaObject>("currentActivity");return context;}catch (Exception){return null;}}}#endregion#region 获得Java类public static AndroidJavaClass JavaClass(string className){try{AndroidJavaClass java_class = new AndroidJavaClass(className);return java_class;}catch (Exception){return null;}}#endregion#region 获得Java对象public static AndroidJavaObject JavaObject(string className, params object[] args){try{AndroidJavaObject java_object = new AndroidJavaObject(className, args);return java_object;}catch (Exception){return null;}}#endregion#endif#region 调用Java类的实例方法public static void Call(string methodName, params object[] args){#if UNITY_ANDROID && !UNITY_EDITORcurrentActivity.Call(methodName, args);#endif}public static T Call<T>(string methodName, params object[] args){#if UNITY_ANDROID && !UNITY_EDITORreturn currentActivity.Call<T>(methodName, args);#endifreturn default(T);}public static void CallClass(string className, string methodName, params object[] args){#if UNITY_ANDROID && !UNITY_EDITORAndroidJavaObject java_object = JavaObject(className);java_object.Call(methodName, args);#endif}public static T CallClass<T>(string className, string methodName, params object[] args){#if UNITY_ANDROID && !UNITY_EDITORAndroidJavaObject java_object = JavaObject(className);return java_object.Call<T>(methodName, args);#endifreturn default(T);}#endregion#region 调用Java类的静态方法public static void CallStatic(string methodName, params object[] args){#if UNITY_ANDROID && !UNITY_EDITORMainActivity.CallStatic(methodName, args);#endif}public static T CallStatic<T>(string methodName, params object[] args){#if UNITY_ANDROID && !UNITY_EDITORreturn MainActivity.CallStatic<T>(methodName, args);#endifreturn default(T);}public static void CallClassStatic(string className, string methodName, params object[] args){#if UNITY_ANDROID && !UNITY_EDITORAndroidJavaClass java_class = JavaClass(className);java_class.CallStatic(methodName, args);#endif}public static T CallClassStatic<T>(string className, string methodName, params object[] args){#if UNITY_ANDROID && !UNITY_EDITORAndroidJavaClass java_class = JavaClass(className);return java_class.CallStatic<T>(methodName, args);#endifreturn default(T);}#endregion
}