Preface
UnityPlayerActivity could not be found! UnityPlayerActivity could not be found! UnityPlayerActivity could not be found! Changed to
the 2019.4 version, and found many errors in exporting android. For example, UnityPlayerActivity could not be found, resources were duplicated and so on. The reason is that Unity has made changes. It seems to be after 2019.2. The version has been upgraded (the specific version is unknown), don't say much, just start it
Android Studio
Create a project, remember the package name
Configuration and code examples in Android Studio
First import classes.jar, there is no change in this step.According to your andriod project mono/IL2Cpp, find the corresponding jar package, such as my project
ctrl+c, then ctrl+v in the AS Libs folder, then click Add as library
and edit MainActivity.java, and found that the UnityplayerActivity
plug-in cannot be inherited unity of Classes.jar package is not present in this class, this time we need to find Untiy in UnityPlayerActivity, for example, my path
you can simply add the class to MainActivitythe same directory, but I recommend more directly copied the entire package
last Effect
Then we MainActivitywrite code in
package com.test.unityandroidtest;
import android.os.Bundle;
import android.widget.Toast;
import com.unity3d.player.UnityPlayer;
import com.unity3d.player.UnityPlayerActivity;
public class MainActivity extends UnityPlayerActivity {
public static MainActivity instance = null; //单例类
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
instance=this;
}
//利用Toast
public void SayHi(final String str)
{
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(),str,Toast.LENGTH_SHORT).show();
}
});
}
//计算两数之和
public int GetSum(int num1,int num2)
{
return num1+num2;
}
public static void SendUnity(String str)
{
String newstr="我是Android传来的消息:"+str;
UnityPlayer.UnitySendMessage("UnityAndroidConnect","AndroidCallUnityMsg",newstr);
}
}
Then modify the AndroidManifest.xml
original
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.test.unityandroidtest">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
After modification
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.test.unityandroidtest">
<application>
<!--表明这个Activity是启动Activity 一定要写完全的包名 路径-->
<activity android:name="com.test.unityandroidtest.MainActivity">
<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>
</application>
</manifest>
Then in AS, the title taskbar Build->Make Project.
Generally, we only need one jar .
Open the jar package with the compressed package, delete the com directory inside, delete
the buildConfig.class in the test file.
Note: When packaging unity , If you encounter
this, D8:Program type already presenit indicates that the resources are duplicated. The above two parts are deleting redundant files.
In Unity
Then put our classes.jarsum AndroidManifest.xmlin Unity, classes.jar in the libs folder,
then create a new gameobject in Unity, name it UnityAndroidConnect, and then add a new script and write the code
using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
public class NewBehaviourScript : MonoBehaviour
{
public Button btnToast, btnNum, btnString;
public Text text;
AndroidJavaClass jc;
AndroidJavaObject androidInstance; //单例
private void Start()
{
try
{
/* 下面的代码已不再适用
AndroidJavaClass jc = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
AndroidJavaObject jo = jc.GetStatic<AndroidJavaObject>("currentActivity");
*/
//一定要写完整
jc = new AndroidJavaClass("com.test.unityandroidtest.MainActivity");
androidInstance = jc.GetStatic<AndroidJavaObject>("instance");
}
catch (Exception e)
{
text.text = "初始化错误:" + e.ToString();
}
btnToast.onClick.AddListener(MakeToast);
btnNum.onClick.AddListener(GetSum);
btnString.onClick.AddListener(UnitySendAndroid);
}
public void MakeToast()
{
try
{
androidInstance.Call("SayHi", "hello unity");
}
catch (Exception e)
{
text.text = e.ToString();
}
}
public void GetSum()
{
try
{
int num = 90;
int num2 = 90;
num = androidInstance.Call<int>("GetSum", num, num2); //返回值Int方法
text.text = "计算结果:" + num.ToString();
}
catch (Exception e)
{
text.text = e.ToString();
}
}
public void UnitySendAndroid()
{
try
{
string str = "loveyou";
jc.CallStatic("SendUnity", str); //静态方法 可以直接用AndroidJavaClass jc
}
catch (Exception e)
{
text.text = e.ToString();
}
}
/// <summary>
/// android 发来的消息
/// </summary>
/// <param name="recvMsg"></param>
public void AndroidCallUnityMsg(string recvMsg)
{
text.text = "结果:" + recvMsg;
}
}
Just build the Unity interface,
package settings,
package test results
The last show operation
The above steps are packaged and run. When looking for information, we found other sao operations, that is, we can directly compile the written java class in unity. Here is an official GitHub project, you can check https://github. com/Unity-Technologies/uaal-example
For example, the MainActivityfiles above are directly placed under the Unity Android (AndroidMainfest.xml should also be placed) folder, it is also completely possible, really possible!!! It is convenient to save a lot of steps