在自定义Unity Android插件上调用非静态方法 [英] Call non-static methods on custom Unity Android Plugins

问题描述

我试图了解如何为Android构建自己的Android插件.

I'm trying to understand how to build my own Android plugins for Android.

我实现了在Java类(在AndroidStudio上创建的类)上调用静态方法的方法，但实际上我不能调用非静态方法.

I achieve to call static methods on my Java class (the one created on AndroidStudio), but I really CAN'T call non-static methods.

我检查了那些链接:

• https://answers.unity.com/questions/884503/cant-call-non-static-method-in-androidjavaclass.html

http://leoncvlt. com/blog/a-primer-on-android-plugin-development-in-unity/

https://answers.unity.com/questions/1327186/how-to-get-intent-data-for-unity-to-use.html

但是没有一个.

我正在尝试从Unity的一个按钮接听电话，

I'm trying to get the call from a button from Unity like:

AndroidJavaClass UnityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
AndroidJavaObject currentActivity = UnityPlayer.Get<AndroidJavaObject>("currentActivity");
currentActivity.Call("SayHi");

我在Android上的活动如下:

And my activity on Android looks like:

public class MainActivity extends UnityPlayerActivity {
    private static final String TAG = "LibraryTest";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Log.d(TAG, "Created!");
    }

    public void SayHi()
    {
        Log.d(TAG, "HI_");
    }
}

我的ADB抛出此消息:

My ADB is throwing this message:

我也尝试过调用，而不是像UnityPlayer那样调用它:

I've also tried calling instead of UnityPlayer call it like:

AndroidJavaClass pluginClass = new AndroidJavaClass("com.example.eric.librarytest.MainActivity");

这是我的AndroidManifest.xml

This is my AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.eric.librarytest"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="24"
        android:targetSdkVersion="28" />

    <application android:label="@string/app_name" >
        <activity
            android:name="com.example.eric.librarytest.MainActivity"
            android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

但是对于非静态方法也不起作用，如果我做了pluginClass.CallStatic("")，它仅对静态方法有效吗?

But doesn't work either for non-static methods, it works only for static methods if I do pluginClass.CallStatic(""), any idea?

• Taras Leskiv建议更改UnityPlayer.Get to UnityPlayer.GetStatic，但随后出现以下错误:

• Taras Leskiv suggest to change UnityPlayer.Get to UnityPlayer.GetStatic, but then i get the follow error:

错误:java.lang.NoSuchMethodError:在类Ljava.lang.Object;中没有名称为'SayHi'signature ='()V'的非静态方法；

error: java.lang.NoSuchMethodError: no non-static method with name='SayHi' signature='()V' in class Ljava.lang.Object;

推荐答案

我的代码正确，问题出在项目结构上.

My code was correct, the problem was the Project structure.

我的项目就像:

Assets
├── Plugins
│   ├── classes.jar

并且应该像这样:

Assets
├── Plugins
│   ├── Android
│   │   ├── classes.jar

是不是很讨厌(对我而言不是)导致垃圾邮件错误是找不到签名的消息，所以该软件无法读取这些类.

Was obvius (not for me) cause the error spam the message that could not find the signature, so the software can't read those classes.

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