Unity3d和Android的互相调用(二)

摘要

上篇文章我们介绍了，Android和Unity3d调用的理论基础，那么这一篇我们就开始简单的实战一下。

---

准备工作

在编写开始，我们先做一下准备工作，这样我们就不会快完工的时候，还要等待下载Android SDK等比较费时的事情。

在你已经拥有了Android的SDK，NDK以及java的环境后，我们需要先在我们的Unity3d将其进行默认话。
Unity3D上部导航栏：Edit–>preference–>External Tools

将下面的对应SDK以及JDK设置为自己的目录。

---

开动喽

首先我们需要确定我们要操作的目标，这里我就以小女孩为目标。 从下图可以看到小女孩的名字为unitychan

接下来我们来看一下其中一个C#脚本是如何进行编写的。

using UnityEngine;
using System.Collections;
using System.Reflection.Emit;

//
// ↑↓キーでループアニメーションを切り替えるスクリプト（ランダム切り替え付き）Ver.3
// 2014/04/03 N.Kobayashi
//

// Require these components when using this script
[RequireComponent(typeof(Animator))]



public class IdleChanger : MonoBehaviour
{

    private Animator anim;                      // Animator动画参照
    private AnimatorStateInfo currentState;     // 当前动画的状态信息
    private AnimatorStateInfo previousState;    // 上一个的动画状态信息
    public bool _random = false;                // 判定不行
    public float _threshold = 0.5f;         
    public float _interval = 2f;                
                                                //private float _seed = 0.0f;                   // ランダム判定用シード


    // Use this for initialization
    void Start ()
    {
        // 组件的初始化和状态的初始化
        anim = GetComponent ();
        currentState = anim.GetCurrentAnimatorStateInfo (0);
        previousState = currentState;
        // 设置我们的协同
        StartCoroutine ("RandomChange");
    }

    // Update is called once per frame
    void  Update ()
    {
        if (Input.GetKeyDown ("up") || Input.GetButton ("Jump")) {
            anim.SetBool ("Next", true);
        }

                if (Input.GetKeyDown ("down")) {
            anim.SetBool ("Back", true);
        }

        if (anim.GetBool ("Next")) {
            currentState = anim.GetCurrentAnimatorStateInfo (0);
            if (previousState.nameHash != currentState.nameHash) {
                anim.SetBool ("Next", false);
                previousState = currentState;               
            }
        }

        if (anim.GetBool ("Back")) {
            currentState = anim.GetCurrentAnimatorStateInfo (0);
            if (previousState.nameHash != currentState.nameHash) {
                anim.SetBool ("Back", false);
                previousState = currentState;
            }
        }
    }


    void OnGUI()
    {
                GUI.Box(new Rect(Screen.width - 110 , 10 ,100 ,90), "Change Motion");
                if(GUI.Button(new Rect(Screen.width - 100 , 40 ,80, 20), "Next"))
                    anim.SetBool ("Next", true);
                if(GUI.Button(new Rect(Screen.width - 100 , 70 ,80, 20), "Back"))
                    anim.SetBool ("Back", true);
    }


    IEnumerator RandomChange ()
    {
        while (true) {
            if (_random) {
                float _seed = Random.Range (-1f, 1f);
                if (_seed <= -_threshold) {
                    anim.SetBool ("Back", true);
                } else if (_seed >= _threshold) {
                    anim.SetBool ("Next", true);
                }
            }
            yield return new WaitForSeconds (_interval);
        }

    }
 //用于Unity3d调用的
    void Unload()
    {
        Application.LoadLevel(1);
        AndroidJavaClass jc = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
        AndroidJavaObject jo = jc.GetStatic("currentActivity");
        jo.Call("makePauseUnity");
    }
    //用于Android调用的
    void back()
    {
        anim.SetBool("Back", true);

    }
    //用于Android调用的
    void next()
    {
        anim.SetBool("Next", true);
    }
}

在编写好我们unity项目后，就要开始进行build了，但是我们需要的是可以二次开发使用的GoogleAndroidProgect项目，因此我们需要设置一下Build的响应属性。
File–>BuildSettings

按照如图所示进行勾选，之后我们需要配置一下导出的版本参数，点击Player Settings

然后选择目录export编译玩会得到如下eclipse的项目

我们将这个项目导入我们的AS,然后开始改吧改吧。首先我把布局发出来。

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:orientation="vertical">

    <LinearLayout
        android:id="@+id/showMain"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:orientation="vertical"/>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <Button
            android:id="@+id/back"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="back"/>

        <Button
            android:id="@+id/next"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="next"/>


    LinearLayout>


LinearLayout>

里面只是一个LinearLayout和两个Button。接下来就开始我们的正经工作了。

package com.Iyunwen.robot;

import android.app.Activity;
import android.content.res.Configuration;
import android.graphics.PixelFormat;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.view.Window;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.Toast;

import com.unity3d.player.UnityPlayer;

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);
        setContentView(R.layout.mainactivity);
        getWindow().setFormat(PixelFormat.RGBX_8888); // <--- This makes xperia play happy
        LinearLayout
                unityVIew = (LinearLayout) findViewById(R.id.showMain);
        mUnityPlayer = new UnityPlayer(this);
        unityVIew.addView(mUnityPlayer);
//        setContentView(mUnityPlayer);
        mUnityPlayer.requestFocus();
        Button mBack = (Button) findViewById(R.id.back);
        Button mNext = (Button) findViewById(R.id.next);
        mBack.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                UnityPlayer.UnitySendMessage("unitychan", "back", "");
            }
        });
        mNext.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                UnityPlayer.UnitySendMessage("unitychan", "next", "");

            }
        });
    }

    public void makePauseUnity() {
        Toast.makeText(this, "unity3D调用Android的方法", Toast.LENGTH_LONG).show();
    }

    // Quit Unity
    @Override
    protected void onDestroy() {
        mUnityPlayer.quit();
        super.onDestroy();
    }

    // Pause Unity
    @Override
    protected void onPause() {
        super.onPause();
        mUnityPlayer.pause();
    }

    // Resume Unity
    @Override
    protected void onResume() {
        super.onResume();
        mUnityPlayer.resume();
    }

    // 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);
    }
}

大工搞成，卡哇伊的妹子在向我们招手哦。
该死的虚拟按键隐藏了我的连个button.