java - Unity 插件的 NoClassDefFoundError 和 ClassNotFoundException

Question

我正在为 Android Studio 中的 Unity 应用程序开发 Android 插件。该插件旨在访问 Google Fit API，并提供随后可在 Unity 应用程序中显示的信息。我在下面包含了我的 Java 文件，在本文末尾包含了我的 Gradle 文件和 list 文件。

UnityPlayerActivity.java 文件

package com.kasperiekqvist.player;

import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.support.v4.app.ActivityCompat;

import com.google.android.gms.common.api.GoogleApiClient;
import com.unity3d.player.UnityPlayer;

import java.text.SimpleDateFormat;
import java.util.Date;

public class UnityPlayerActivity extends com.unity3d.player.UnityPlayerActivity {

    private GoogleApiClient mClient = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        logInUnity("onCreate", null);
        super.onCreate(savedInstanceState);
        checkPermissions();
    }

    /* SNIP */

    private boolean checkPermissions() {
        int permissionState = ActivityCompat.checkSelfPermission(this,
                Manifest.permission.ACCESS_FINE_LOCATION);
        boolean hasPermission = permissionState == PackageManager.PERMISSION_GRANTED;
        logInUnity("checkPermissions", new String[] { "ACCESS_FINE_LOCATION:" + hasPermission });
        return hasPermission;
    }

    private void logInUnity(String methodName, String[] linesToLog) {
        if(methodName != null) {
            String message = "UnityPlayerActivity:" + methodName + " was called at ";
            message += new SimpleDateFormat("MM-dd HH:mm:ss").format(new Date());
            if(linesToLog != null) {
                    for(int i = 0; i < linesToLog.length; i++) {
                        message += ";" + linesToLog[i];
                    }
            }
            UnityPlayer.UnitySendMessage("JavaCallback", "LogInUnity", message);
        }
    }
}

logInUnity() 方法被正确调用。我在 C# 脚本的 LogInUnity() 方法中使用 Debug.Log() 方法记录内容。使用命令 adb logcat -s Unity delvikvm DEBUG 时，我可以在命令提示符中看到所有内容。

问题是访问 Android 支持库。当我在 checkPermissions 方法中调用 ActivityCompat.checkSelfPermission() 时，我的 Activity 立即强制完成。我在下面包含了有关崩溃的信息。

崩溃信息

10-15 19:57:53.843 18197 18197 E AndroidRuntime: FATAL EXCEPTION: main
10-15 19:57:53.843 18197 18197 E AndroidRuntime: Process: com.kasperiekqvist.androidpluginproject, PID: 18197
10-15 19:57:53.843 18197 18197 E AndroidRuntime: java.lang.Error: FATAL EXCEPTION [main]
10-15 19:57:53.843 18197 18197 E AndroidRuntime: Unity version     : 2017.2.0f3
10-15 19:57:53.843 18197 18197 E AndroidRuntime: Device model      : OnePlus ONEPLUS A5000
10-15 19:57:53.843 18197 18197 E AndroidRuntime: Device fingerprint: OnePlus/OnePlus5/OnePlus5:7.1.1/NMF26X/09131759:user/release-keys
10-15 19:57:53.843 18197 18197 E AndroidRuntime: 
10-15 19:57:53.843 18197 18197 E AndroidRuntime: Caused by: java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v4/app/ActivityCompat;
10-15 19:57:53.843 18197 18197 E AndroidRuntime:    at com.kasperiekqvist.player.UnityPlayerActivity.checkPermissions(UnityPlayerActivity.java:74)
10-15 19:57:53.843 18197 18197 E AndroidRuntime:    at com.kasperiekqvist.player.UnityPlayerActivity.onCreate(UnityPlayerActivity.java:27)
10-15 19:57:53.843 18197 18197 E AndroidRuntime:    at android.app.Activity.performCreate(Activity.java:6743)
10-15 19:57:53.843 18197 18197 E AndroidRuntime:    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1134)
10-15 19:57:53.843 18197 18197 E AndroidRuntime:    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2715)
10-15 19:57:53.843 18197 18197 E AndroidRuntime:    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2848)
10-15 19:57:53.843 18197 18197 E AndroidRuntime:    at android.app.ActivityThread.-wrap12(ActivityThread.java)
10-15 19:57:53.843 18197 18197 E AndroidRuntime:    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1552)
10-15 19:57:53.843 18197 18197 E AndroidRuntime:    at android.os.Handler.dispatchMessage(Handler.java:102)
10-15 19:57:53.843 18197 18197 E AndroidRuntime:    at android.os.Looper.loop(Looper.java:154)
10-15 19:57:53.843 18197 18197 E AndroidRuntime:    at android.app.ActivityThread.main(ActivityThread.java:6334)
10-15 19:57:53.843 18197 18197 E AndroidRuntime:    at java.lang.reflect.Method.invoke(Native Method)
10-15 19:57:53.843 18197 18197 E AndroidRuntime:    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
10-15 19:57:53.843 18197 18197 E AndroidRuntime:    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
10-15 19:57:53.843 18197 18197 E AndroidRuntime: Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.v4.app.ActivityCompat" on path: DexPathList[[zip file "/data/app/com.kasperiekqvist.androidpluginproject-2/base.apk"],nativeLibraryDirectories=[/data/app/com.kasperiekqvist.androidpluginproject-2/lib/arm, /data/app/com.kasperiekqvist.androidpluginproject-2/base.apk!/lib/armeabi-v7a, /system/lib, /vendor/lib]]
10-15 19:57:53.843 18197 18197 E AndroidRuntime:    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
10-15 19:57:53.843 18197 18197 E AndroidRuntime:    at java.lang.ClassLoader.loadClass(ClassLoader.java:380)
10-15 19:57:53.843 18197 18197 E AndroidRuntime:    at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
10-15 19:57:53.843 18197 18197 E AndroidRuntime:    ... 14 more
10-15 19:57:53.843 18197 18197 D AppTracker: App Event: crash
10-15 19:57:53.846  1804 16770 W ActivityManager:   Force finishing activity com.kasperiekqvist.androidpluginproject/com.kasperiekqvist.player.UnityPlayerActivity
10-15 19:57:53.848  1804 16770 D ActivityTrigger: ActivityTrigger activityPauseTrigger 
10-15 19:57:53.849 18197 18197 I Process : Sending signal. PID: 18197 SIG: 9
10-15 19:57:53.851  4741  6303 D OPReportService: addMonitorFolder onEvent path=data_app_crash@2017-10-15-19_57_53_851.txt, event:128
10-15 19:57:53.860  1804  4733 D EmbryoManager: prepare com.kasperiekqvist.androidpluginproject
10-15 19:57:53.860  1804  4733 I ActivityManager: Process com.kasperiekqvist.androidpluginproject (pid 18197) has died
10-15 19:57:53.860  1804  4733 D ActivityManager: get process top duration : com.kasperiekqvist.androidpluginproject, duration : 45
10-15 19:57:53.860  1804  4733 D ActivityManager: cleanUpApplicationRecord -- 18197

我在我的 gradle 文件的依赖项中包含了 compile 'com.android.support:support-v4:25.3.1'。根据我所做的研究，我认为问题在于我的 jar 文件中没有包含 Android 支持库。不过，我可能错了。

尽管如此，我已经没有什么可以尝试的了。我在 Stack Overflow 上发现了许多具有相同错误的类似问题，并且我尝试使用这些问题的答案中建议的许多内容来解决我的问题。然而，到目前为止，它们都没有奏效。

澄清一下，在添加 ActivityCompat.checkSelfPermission() 方法调用之前一切正常。所以，问题一定出在支持库上。

build.gradle 文件

apply plugin: 'com.android.library'

android {
    compileSdkVersion 25
    buildToolsVersion "26.0.2"

    defaultConfig {
        minSdkVersion 16
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support:appcompat-v7:25.3.1'
    testCompile 'junit:junit:4.12'
    compile 'com.google.android.gms:play-services-fitness:11.0.4'
    compile 'com.android.support:support-v4:25.3.1'
}

AndroidManifest.xml 文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.kasperiekqvist.androidpluginproject" xmlns:tools="http://schemas.android.com/tools" android:versionName="1.0" android:versionCode="1" android:installLocation="preferExternal">
  <supports-screens android:smallScreens="true" android:normalScreens="true" android:largeScreens="true" android:xlargeScreens="true" android:anyDensity="true" />
  <application android:theme="@style/UnityThemeSelector" android:icon="@drawable/app_icon" android:label="@string/app_name" android:debuggable="false" android:isGame="true" android:banner="@drawable/app_banner">
    <activity android:name="com.kasperiekqvist.player.UnityPlayerActivity" android:label="@string/app_name" android:screenOrientation="fullSensor" android:launchMode="singleTask" android:configChanges="mcc|mnc|locale|touchscreen|keyboard|keyboardHidden|navigation|orientation|screenLayout|uiMode|screenSize|smallestScreenSize|fontScale|layoutDirection|density">
      <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
        <category android:name="android.intent.category.LEANBACK_LAUNCHER" />
      </intent-filter>
      <meta-data android:name="unityplayer.UnityActivity" android:value="true" />
    </activity>
    <meta-data android:name="unity.build-id" android:value="c9792a78-0123-4f4b-be86-1b85de56f689" />
    <meta-data android:name="unity.splash-mode" android:value="0" />
    <meta-data android:name="unity.splash-enable" android:value="True" />
    <meta-data android:name="android.max_aspect" android:value="2.1" />
  </application>
  <uses-sdk android:minSdkVersion="16" android:targetSdkVersion="25" />
  <uses-feature android:glEsVersion="0x00020000" />
  <uses-feature android:name="android.hardware.vulkan" android:required="false" />
  <uses-feature android:name="android.hardware.touchscreen" android:required="false" />
  <uses-feature android:name="android.hardware.touchscreen.multitouch" android:required="false" />
  <uses-feature android:name="android.hardware.touchscreen.multitouch.distinct" android:required="false" />
  <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
</manifest>

Answer 1

我设法使用 Play Services Resolver for Unity 解决了我的问题.我遵循了 README.md 文件中详述的步骤，并包含了包含以下内容的 *Dependencies.xml 文件:

<dependencies>
  <androidPackages>
    <androidPackage spec="com.android.support:support-v4:25.3.1">
      <androidSdkPackageIds>
        <androidSdkPackageId>extras-android-m2repository</androidSdkPackageId>
      </androidSdkPackageIds>
      <repositories>
        <repository>https://maven.google.com</repository>
      </repositories>
    </androidPackage>
  </androidPackages>
</dependencies>

解析器完成工作后，我的项目文件最终看起来像这样:

事后看来，我想知道从 Android SDK 文件夹下找到的文件中导入这些文件是否就足够了。我想我之前已经尝试过包含 support-v4-25.3.1，但出于某种原因我记得它不起作用。

在此之后并明确授予应用程序 ACCESS_FINE_LOCATION 权限后，我设法在我的命令提示符中获得以下输出，这证明现在一切正常:

10-15 23:43:26.574  3438  3693 I Unity   : UnityPlayerActivity:checkPermissions was called at 10-15 23:43:23
10-15 23:43:26.574  3438  3693 I Unity   : ACCESS_FINE_LOCATION:true
10-15 23:43:26.574  3438  3693 I Unity   :  
10-15 23:43:26.574  3438  3693 I Unity   : (Filename: ./artifacts/generated/common/runtime/DebugBindings.gen.cpp Line: 51)
10-15 23:43:26.574  3438  3693 I Unity   :