Question Android java source plugin import com.unity3d.player.UnityPlayer?

I'm trying to write a java source only plugin as described here:
https://docs.unity3d.com/Manual/AndroidJavaSourcePlugins.html

import com.unity3d.player.UnityPlayer;

I want to import and use the UnityPlayer class in my plugin code, but I can't figure out how to get it imported successfully. Any idea how this can be done?

I know I can do this with a aar plugin, but I want the simplicity of compiling the java source in Unity instead of making a library project with Android Studio and dragging it into the project.

 

I don't think you read my question. I already tried what you said.

The problem is that I need to use classes from com.unity3d.player.UnityPlayer. I imported that package in my java file, and compiled for Android, and got this error.

package com.unity3d.player does not exist
import com.unity3d.player.UnityPlayer;

 

Are you saying there's no way to import com.unity3d.player.UnityPlayer in a java source only plugin?

 

I thought it was a little strange that you were saying I should put my class into the com.unity3d.player package. It seemed like you were saying that's what I should do.

Anyway, I was able to get it working by just placing the java file into my project -- as you said. I also tried using my own package name, and that worked. I think the problem was that I thought I was supposed to create the package directory structure in the unity project java/com/domain/package/etc. When I did that, the unity android compile wasn't able to import the com.unity3d.player package classes that I needed to use in my java file. It would be really good if Unity could more clearly document creating a java source only plugin. I wasn't able to figure it out from the existing documentation and I was left trying to piece it together from random blog posts -- some of which gave me incorrect or outdated information.

Thanks for your help.

 

Can you help me modify the code? TestJavaSource in c# cannot execute java function successfully.
c# code：

Code (CSharp):

1.  
2. public void TestToast(string t)
3. {
4.     Debug.LogWarning("start test toast:" + t);
5.     AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
6.     AndroidJavaObject unityActivity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
7.     AndroidJavaClass toastClass = new AndroidJavaClass("android.widget.Toast");
8.     unityActivity.Call("runOnUiThread", new AndroidJavaRunnable(() =>
9.     {
10.         AndroidJavaObject toastObject = toastClass.CallStatic<AndroidJavaObject>("makeText", unityActivity, t, 3);
11.         toastObject.Call("show");
12.         Debug.LogWarning("start test toast  show on ui thread");
13.     }));
14. }
15.  
16. public void TestJavaSource()
17. {
18.     AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
19.     AndroidJavaObject unityActivity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
20.     // unityActivity.Call("runOnUiThread", new AndroidJavaRunnable(() =>
21.     // {
22.         AndroidJavaClass testClass = new AndroidJavaClass("com.test.MyJavaTestClass");
23.         testClass.Call("showToast", unityActivity, "test java call toast====================");
24.         // testClass.Call("testLog", "test java call log====================");
25.         // testClass.Call("testCallUnity");
26.         Debug.LogWarning("test java call");
27.     // }));
28. }
29.  
30. void JavaMessage(string message) {
31.     Debug.Log("message from java: " + message);
32. }
33.  

The java source "MyJavaTestClass.java" in the "Assets/Plugins/Android" folder

Code (JavaScript):

1.  
2. package com.test;
3.  
4. import android.content.Context;
5. import android.widget.Toast;
6. import android.util.Log;
7. import com.unity3d.player.UnityPlayer;
8. public class MyJavaTestClass{
9.     public void showToast(Context act, String msg){
10.         Toast.makeText(act, msg, 3).show();
11.         Log.w("java MyJavaTestClass", "showToast");
12.     }
13.     public void testLog(String str){
14.         Log.w("java MyJavaTestClass", "testLog:"+str);
15.     }
16.  
17.     public void testCallUnity(){
18.         UnityPlayer.UnitySendMessage("main", "JavaMessage", "testCallUnity");
19.     }
20. }
21.  

player setting：

 

Thank you for your reply, it solved the problem that troubled me for two days.