一.Android導出jar或aar包到Unity

• 當在Android Studio開發時，將unity的jar包導入后，可自定義一個類繼承自com.unity3d.player.UnityPlayerActivity

import com.unity3d.player.UnityPlayerActivity;public class MainActivity extends UnityPlayerActivity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);}}

• 而UnityPlayerActivity代碼如下：

public class UnityPlayerActivity extends Activity {protected UnityPlayer mUnityPlayer;public UnityPlayerActivity() {}protected void onCreate(Bundle var1) {this.requestWindowFeature(1);super.onCreate(var1);this.mUnityPlayer = new UnityPlayer(this);this.setContentView(this.mUnityPlayer);this.mUnityPlayer.requestFocus();}... }

因為子類創建時不會創建父類對象，所以這個this是子類對象的引用。

• UnityPlayer的代碼如下：

public UnityPlayer(Context var1) {super(var1);if (var1 instanceof Activity) {currentActivity = (Activity)var1;this.c = currentActivity.getRequestedOrientation();}... }

此時的currentActivity就是MainActivity對象的引用

• 所以在Unity中獲取的currentActivity就是MainActivity，代碼如下:

AndroidJavaClass javaClass3 = new AndroidJavaClass("com.unity3d.player.UnityPlayer"); AndroidJavaObject javaObject = javaClass.GetStatic<AndroidJavaObject>("currentActivity");

• 在Android中同樣可以獲取currentActivity

public static Activity GetActivity() {Activity activity = null;try {Class<?> classtype = Class.forName("com.unity3d.player.UnityPlayer");activity = (Activity)classtype.getDeclaredField("currentActivity").get(classtype);}catch (Exception e){}return activity; }

• 此時AndroidManifest.xml中的入口Activity
  此時Activity的name可以為:

name = “包名.MainActivity”
或
name = “.MainActivity” (與上面表示的相同)
另：
當改為name = “com.unity3d.player.UnityPlayerActivity” 也運行正常

<activity android:name="包名.MainActivity"><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter><meta-dataandroid:name="unityplayer.UnityActivity"android:value="true" /> </activity>

二.Unity導出project到Android進行二次開發

Andrioid平臺Gradle模式 勾選Export Project

該操作會自動生成一個 包名.UnityPlayerActivity,其路徑為:
xxx\src\main\java\com\xxx\xxx\UnityPlayerActivity.java
代碼如下:

package com.xxx.xxx; public class UnityPlayerActivity extends Activity {protected UnityPlayer mUnityPlayer; // don't change the name of this variable; referenced from native code// Setup activity layout@Override protected void onCreate(Bundle savedInstanceState){requestWindowFeature(Window.FEATURE_NO_TITLE);super.onCreate(savedInstanceState);mUnityPlayer = new UnityPlayer(this);setContentView(mUnityPlayer);mUnityPlayer.requestFocus();}... }

若原本Android/plugins下沒有AndroidMainfest.xml,則使用的是默認的AndroidMainfest.xml,且入口Activity默認為:

name=“com.unity3d.player.UnityPlayerActivity”

<activity android:name="com.unity3d.player.UnityPlayerActivity"android:label="@string/app_name"><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>

導出project生成的AndroidMainfest.xml中：

name=“包名.UnityPlayerActivity”

總結

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