AndroidStudio Export Jar For Unity

AndroidStudio Export Jar For Unity

环境：AndroidStudio 2.1.1 + Unity5.4.0f1

大体步骤如下：

1. 创建AndroidStudio工程
2. 生成jar
3. 将jar导入Unity工程

废话不多说，一步一步完成就好……

创建AndroidStudio工程

1.1 设置好名称、路径、包名。

1.2 选择SDK

1.3 选择 Empty Activity

1.4 不改名，直接finish

到这里，工程就创建完毕了，接下来创建一个Module来封装几个简单的方法，然后生成Jar文件。

生成jar

2.1 创建Module 点击File->New->New Module

2.2 选择Anroid Library

2.3 输入Library的名字和包名，爱输啥输啥，看喜好，这里我的包名书写的和新建的项目包名不同，这里为org.lzy.test.myjar

2.4 找到Unity中的classes.jar导入到AndroidStudio工程，那个文件路径大约在Unity安装路径的这里（5.x版本的Unity）：
\Editor\Data\PlaybackEngines\AndroidPlayer\Variations\mono\Release\Classes\classes.jar
找到后复制这个文件到刚才新建的Library中的libs文件中。

如果视图是Android，不是Project，可以切换到Project标签。点击标签的小三角就能看到

2.5 把classes.jar加入依赖。点击File->Project Structure

2.6 Modules选择自己新建的Android Library，中间栏点Dependencies标签，然后点击右侧加号+，选择File Dependency，然后找到自己拷贝进来的在libs目录下的classes.jar点击OK

2.7 新建Class。

名字为：MyExportActivity

MyExportActivity.java

package org.lzy.test.myjar;

import android.app.AlertDialog;
import android.content.Intent;
import android.os.Vibrator;

import com.unity3d.player.UnityPlayerActivity;

public class MyExportActivity extends UnityPlayerActivity {
    public void showDialog(final String mTitle, final String mContent) {
        runOnUiThread(new Runnable() {

            @Override
            public void run() {
                AlertDialog.Builder mBuilder = new AlertDialog.Builder(MyExportActivity.this);
                mBuilder.setTitle(mTitle)
                        .setMessage(mContent)
                        .setPositiveButton("确定", null);
                mBuilder.show();
            }
        });
    }

    public void shareText(String subject, String body) {
        Intent sharingIntent = new Intent(android.content.Intent.ACTION_SEND);
        sharingIntent.setType("text/plain");
        sharingIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, subject);
        sharingIntent.putExtra(android.content.Intent.EXTRA_TEXT, body);
        startActivity(Intent.createChooser(sharingIntent, "Share via"));
    }

    public void setVibrator() {
        Vibrator mVibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);
        mVibrator.vibrate(new long[]{200, 2000, 2000, 200, 200, 200}, -1);
    }
}

2.8 双击build.gradle，修改代码，注意修改的是自己新建的Library的build.gradle，不是整个project的build.gradle

build.gradle

//indicates that this is a library
apply plugin: 'com.android.library'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.3"
    sourceSets {
        main {
            //Path to your source code
            java {
                srcDir 'src/main/java'
            }
        }
    }

    defaultConfig {

        minSdkVersion 21
        targetSdkVersion 23

    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
        }
    }
    lintOptions {
        abortOnError false
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.3.0'
    compile files('libs/classes.jar')
}

//task to delete the old jar
task deleteOldJar(type: Delete) {
    delete 'release/AndroidPlugin.jar'
}

//task to export contents as jar
task exportJar(type: Copy) {
    from('build/intermediates/bundles/release/')
    into('release/')
    include('classes.jar')
    ///Rename the jar
    rename('classes.jar', 'AndroidPlugin.jar')
}

exportJar.dependsOn(deleteOldJar, build)

2.9 刷新gradle，一般情况下修改了build.gradle后，系统上方会让你SyncNow，还可以手动刷新一下，右侧点击Gradle标签，选中自己的Library，右击选择Refresh external project

2.10 生成jar，找到other下的exportJar，并双击，等待完成

完成后出现如下提示

我们可以看到在release目录已经有生成好的jar包了，右击Show in Explorer可以拿到jar包AndroidPlugin.jar

将jar导入Unity工程

创建Unity工程，制作三个按钮来测试封装的android层的三个方法
3.1 创建Unity工程，新建UI的Canvas

3.2 在Canvas下创建UI的Panel，添加一个Grid Layout Group

3.3 创建3个按钮，名为：BtnShowDialog、BtnShareText、BtnSetVibrator

3.4 编写代码，触发按钮事件调用Android方法
UIController.cs

using UnityEngine;
using System.Collections;
using UnityEngine.UI;

public class UIController : MonoBehaviour
{
    private AndroidJavaClass unity;
    private string subject = "WORD-O-MAZE";
    private string body = "PLAY THIS AWESOME. GET IT ON THE PLAYSTORE";
    private Button[] btns;

    void Awake()
    {
        if (unity == null)
        {
            unity = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
        }
    }

    void Start()
    {
        btns = GetComponentsInChildren<Button>();
        for (int i = 0; i < btns.Length; i++)
        {
            Button btn = btns[i];
            btn.onClick.AddListener(delegate
            {
                OnBtnClick(btn.gameObject);
            });
        }
    }

    void OnBtnClick(GameObject go)
    {
        switch (go.name)
        {
            case "BtnShowDialog":
                CallShowDialog();
                break;
            case "BtnShareText":
                CallShareText();
                break;
            case "BtnSetVibrator":
                CallSetVibrator();
                break;
        }
    }

    private void CallShowDialog()
    {
        AndroidJavaObject currentActivity = unity.GetStatic<AndroidJavaObject>("currentActivity");
        currentActivity.Call("showDialog", "this is my title", "this is my content");
    }

    private void CallShareText()
    {
        AndroidJavaObject currentActivity = unity.GetStatic<AndroidJavaObject>("currentActivity");
        currentActivity.Call("shareText", subject, body);
    }
    private void CallSetVibrator()
    {
        AndroidJavaObject currentActivity = unity.GetStatic<AndroidJavaObject>("currentActivity");
        currentActivity.Call("setVibrator");
    }
}

3.5 将UIController.cs脚本挂到Canvas上

3.6 将刚才打好的AndroidPlugin.jar拷贝到Unity工程的Assets\Plugins\Android中，并在该文件中新建AndroidManifest.xml文件。

注意：在activity的这一句包名和类名要书写正确
activity android:name=”org.lzy.test.myjar.MyExportActivity”
此处的包名是我们新建的Library的包名：org.lzy.test.myjar，类名是书写的MyExportActivity.java的类名

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android">
  <uses-permission android:name="android.permission.VIBRATE"></uses-permission>
  <application android:icon="@drawable/app_icon" android:label="@string/app_name">
    <activity android:name="org.lzy.test.myjar.MyExportActivity"
          android:label="@string/app_name"
          android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen">
      <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
      </intent-filter>
    </activity>
  </application>
</manifest>

3.7 设置Unity的Player Settings，注意先切换到Android，包名随便修改，一定要修改，默认的包名无法打包，然后，Build And Run吧。

3.8运行效果

showDialog

shareText

setVibrator
震动没有办法截图。。。。

参考感谢
很多人，不过都没记住