Unity在Android Activity中加载的时期测试

    之前在研究Unity3D项目接入Android SDK中，发现在Unity项目生命周期与Android并不一样，无法直接管理Android的生命周期（需要导成Android项目才可以）。    而通过Unity版SDK接入Android，发现SDK的生命周期却没参与运行。在反编译后smali文件中加入SDK的生命周期后发现，Unity项目中的生命周期加载要在Android Activity onResume()之后。

Unity生命周期

Android Activity生命周期

对比

两者显然无法对比。
为确定Unity的生命加载周期在Android中的时期，为此我们准备一个测试Demo。

UnityDemo

1.新建一个Unity项目

点击Main Camara–>Add Component–>New Script–>UnityAndroidDemo.cs
在生命周期内添加打印信息，cs内容如下：

using UnityEngine;using System.Collections;public class UnityAndroidDemo : MonoBehaviour {    void Awake()    {        print("UnityAndroidDemo Unity is on Awake()");    }    // Use this for initialization    void Start () {        print("UnityAndroidDemo Unity is on Start()");    }    // Update is called once per frame    void Update () {    }}

2.导出成Android项目

File–>BuildSettings–>设置包名–>Platform–>Android–>Google Android Project–>Export

3.用Eclipse打开导出的Android项目，打印生命周期信息

编辑后的UnityPlayerActivity的代码如下：

package com.yuchenfw.unityandroiddemo;import com.unity3d.player.*;import android.app.Activity;import android.content.res.Configuration;import android.graphics.PixelFormat;import android.os.Bundle;import android.util.Log;import android.view.KeyEvent;import android.view.MotionEvent;import android.view.View;import android.view.Window;import android.view.WindowManager;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);        Log.e("UnityAndroidDemo","UnityAndroidDemo Android is onCreate()");        getWindow().setFormat(PixelFormat.RGBX_8888); // <--- This makes xperia play happy        mUnityPlayer = new UnityPlayer(this);        setContentView(mUnityPlayer);        mUnityPlayer.requestFocus();    }    // Quit Unity    @Override protected void onDestroy ()    {        mUnityPlayer.quit();        super.onDestroy();        Log.e("UnityAndroidDemo","UnityAndroidDemo Android is onDestroy()");    }    // Pause Unity    @Override protected void onPause()    {        super.onPause();        mUnityPlayer.pause();        Log.e("UnityAndroidDemo","UnityAndroidDemo Android is onPause()");    }    // Resume Unity    @Override protected void onResume()    {        super.onResume();        mUnityPlayer.resume();        Log.e("UnityAndroidDemo","UnityAndroidDemo Android is onResume()");    }    @Override protected void onStart()    {        super.onResume();        mUnityPlayer.resume();        Log.e("UnityAndroidDemo","UnityAndroidDemo Android is onStart()");    }    // This ensures the layout will be correct.    @Override public void onConfigurationChanged(Configuration newConfig)    {        super.onConfigurationChanged(newConfig);        mUnityPlayer.configurationChanged(newConfig);    }    // Notify Unity of the focus change.    @Override public void onWindowFocusChanged(boolean hasFocus)    {        super.onWindowFocusChanged(hasFocus);        mUnityPlayer.windowFocusChanged(hasFocus);    }    // For some reason the multiple keyevent type is not supported by the ndk.    // Force event injection by overriding dispatchKeyEvent().    @Override public boolean dispatchKeyEvent(KeyEvent event)    {        if (event.getAction() == KeyEvent.ACTION_MULTIPLE)            return mUnityPlayer.injectEvent(event);        return super.dispatchKeyEvent(event);    }    // Pass any events not handled by (unfocused) views straight to UnityPlayer    @Override public boolean onKeyUp(int keyCode, KeyEvent event)     { return mUnityPlayer.injectEvent(event); }    @Override public boolean onKeyDown(int keyCode, KeyEvent event)   { return mUnityPlayer.injectEvent(event); }    @Override public boolean onTouchEvent(MotionEvent event)          { return mUnityPlayer.injectEvent(event); }    /*API12*/ public boolean onGenericMotionEvent(MotionEvent event)  { return mUnityPlayer.injectEvent(event); }}

4.运行

run as –>Android Application
日志如下：

红色是Android Activity的加载，绿色是Unity生命周期加载

5.结论

从日志可以看出，Unity的加载是在Android的onResume()之后进行的，因此在Unity中接入Android 的SDK时，涉及到的生命周期问题一定要在导成Android项目中进行，否则因SDK加载的过晚可能会导致功能的异常。

Unity在Android(安卓)Activity中加载的时期测试