unity和安卓简单交互,跳转界面

运行环境
unity2019.2.0
Androidstudio3.5.2

基础的不说了,直接上代码
MainActivity

package com.gzpi.mylibrary;

import androidx.appcompat.app.AppCompatActivity;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

import com.unity3d.player.UnityPlayerActivity;

public class MainActivity extends Activity {
    TextView textView;

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // 获取一个按钮点击事件为跳转unity界面
        textView = findViewById(R.id.button_to_unity);
        textView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MainActivity.this, mActivity.class);
                startActivity(intent);
            }
        });
    }
}

mActivity

package com.gzpi.mylibrary;

import androidx.appcompat.app.AppCompatActivity;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;

import com.unity3d.player.UnityPlayer;
import com.unity3d.player.UnityPlayerActivity;

public class mActivity extends UnityPlayerActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        testSendMessage();
    }
    // 向unity发送信息
    public void testSendMessage()
    {
        UnityPlayer.UnitySendMessage("unityObject", "fromAndroid", "test");
    }
    // 接收unity信息
    public void ShowToast()
    {
        // unity点击按钮跳转回安卓界面
        Intent intent = new Intent(this, MainActivity.class);
        this.startActivity(intent);
    }
}

AndroidMainifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.gzpi.mylibrary">

    <application
        android:allowBackup="true"
        android:label="调用程序测试"
        android:supportsRtl="true">

        <activity
            android:name="com.gzpi.mylibrary.MainActivity"
            android:label="调用程序测试">
            <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>

        <activity android:name="com.gzpi.mylibrary.mActivity"></activity>
    </application>

</manifest>

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">

<Button
    android:id="@+id/button_to_unity"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="Button" />
</LinearLayout>

就这几处代码,因为是很简单的demo其他地方不需要修改,像导入unity的jar包什么的我就不写进去了

打aar包,导入unity
这里有一步需要注意 刚打出来的aar包需要把libs文件夹下的jar包删掉,如果之后在unity打包有报错的话需要打开aar包根目录的class.jar,删掉BuildConfig文件

C#脚本

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

public class test : MonoBehaviour
{
    public Button btn;
    AndroidJavaObject jo;
    private void Awake()
    {
        AndroidJavaClass jc = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
        jo = jc.GetStatic<AndroidJavaObject>("currentActivity");
        btn.onClick.AddListener(CallAndroid);
    }
    public void CallAndroid()
    {
        jo.Call("ShowToast");
        Debug.Log("点击按钮");
        System.Console.WriteLine("点击按钮");
    }
    
	void fromAndroid(string str)
    {
        Debug.Log("安卓传来信息 : " + str);
        System.Console.WriteLine("安卓传来信息 : " + str);
    }
}

注意把BuildSetting包名换成和安卓一致的,打包搞定
有一点要注意,如果是新建模块,在新建模块里执行的话安卓包名和unity不能一致,否则会报错(个人发现,不知道是否正确,但是经过实践确实是这样)