AndroidStudio Export Jar For Unity

環境：AndroidStudio 2.1.1 + Unity5.4.0f1

大體步驟如下：

創建AndroidStudio工程 生成jar 將jar導入Unity工程

廢話不多說，一步一步完成就好……

創建AndroidStudio工程

1.1 設置好名稱、路徑、包名。

1.2 選擇SDK

1.3 選擇 Empty Activity

1.4 不改名，直接finish

到這裡，工程就創建完畢了，接下來創建一個Module來封裝幾個簡單的方法，然後生成Jar文件。

生成jar

2.1 創建Module 點擊File->New->New Module

2.2 選擇Anroid Library

2.3 輸入Library的名字和包名，愛輸啥輸啥，看喜好，這裡我的包名書寫的和新建的項目包名不同，這裡為org.lzy.test.myjar

2.4 找到Unity中的classes.jar導入到AndroidStudio工程，那個文件路徑大約在Unity安裝路徑的這裡（5.x版本的Unity）：
\EditZ喎?/kf/ware/vc/" target="_blank" class="keylink">vclxEYXRhXFBsYXliYWNrRW5naW5lc1xBbmRyb2lkUGxheWVyXFZhcmlhdGlvbnNcbW9ub1xSZWxlYXNlXENsYXNzZXNcY2xhc3Nlcy5qYXI8YnIgLz4NCtXStb2687i01sbV4rj2zsS8/rW9uNWyxdDCvai1xExpYnJhcnnW0LXEbGlic87EvP7W0KGjPGJyIC8+DQo8aW1nIGFsdD0="這裡寫圖片描述" src="/uploadfile/Collfiles/20160827/20160827093150322.png" title="\" />

如果視圖是Android，不是Project，可以切換到Project標簽。點擊標簽的小三角就能看到

2.5 把classes.jar加入依賴。點擊File->Project Structure

2.6 Modules選擇自己新建的Android Library，中間欄點Dependencies標簽，然後點擊右側加號+，選擇File Dependency，然後找到自己拷貝進來的在libs目錄下的classes.jar點擊OK

2.7 新建Class。

名字為：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("確定", 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 雙擊build.gradle，修改代碼，注意修改的是自己新建的Library的build.gradle，不是整個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，一般情況下修改了build.gradle後，系統上方會讓你SyncNow，還可以手動刷新一下，右側點擊Gradle標簽，選中自己的Library，右擊選擇Refresh external project

2.10 生成jar，找到other下的exportJar，並雙擊，等待完成

完成後出現如下提示

我們可以看到在release目錄已經有生成好的jar包了，右擊Show in Explorer可以拿到jar包AndroidPlugin.jar

將jar導入Unity工程

創建Unity工程，制作三個按鈕來測試封裝的android層的三個方法
3.1 創建Unity工程，新建UI的Canvas

3.2 在Canvas下創建UI的Panel，添加一個Grid Layout Group

3.3 創建3個按鈕，名為：BtnShowDialog、BtnShareText、BtnSetVibrator

3.4 編寫代碼，觸發按鈕事件調用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();
        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("currentActivity");
        currentActivity.Call("showDialog", "this is my title", "this is my content");
    }

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

3.5 將UIController.cs腳本掛到Canvas上

3.6 將剛才打好的AndroidPlugin.jar拷貝到Unity工程的Assets\Plugins\Android中，並在該文件中新建AndroidManifest.xml文件。

注意：在activity的這一句包名和類名要書寫正確
activity android:name=”org.lzy.test.myjar.MyExportActivity”
此處的包名是我們新建的Library的包名：org.lzy.test.myjar，類名是書寫的MyExportActivity.java的類名

AndroidManifest.xml

3.7 設置Unity的Player Settings，注意先切換到Android，包名隨便修改，一定要修改，默認的包名無法打包，然後，Build And Run吧。

3.8運行效果

showDialog

shareText

setVibrator
震動沒有辦法截圖。。。。