问题描述
导入aar文件, code> repo,你必须在你的项目中指定依赖项。
你应该使用 maven仓库图书馆在私人或公共maven回购),你不会有同样的问题。
在这种情况下,gradle会使用包含依赖项列表的pom文件下载依赖项。I'm getting class not found exception in my Android library (aar) when GoogleApiAvailability is called.
Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.android.gms.common.GoogleApiAvailability" on path: DexPathList[[zip file "/data/app/com.myunityplugin.PushNotifications-1/base.apk"],nativeLibraryDirectories=[/data/app/com.myunityplugin.PushNotifications-1/lib/arm, /vendor/lib, /system/lib]]The error is self-explanatory, but I'm not sure what I'm doing wrong. I'm pretty new to gradle and AndroidStudio.
I have the following under dependencies within my gradle.build:
compile 'com.google.android.gms:play-services:8.4.0' compile 'com.google.android.gms:play-services-gcm:8.4.0'I think the problem is that the play-services library needs to be included in the aar, and compile doesn't do that. I tried using 'runtime' but I get "gradle dsl runtime not found".
Questions:
- Is this an issue where I need to include the play-services library in my aar, and how do I accomplish that? (if not, how do I address this problem)
- Do I need to specify play-services or does play-services-gcm suffice?
Error Info / Setup
Line causing the error
GoogleApiAvailability ServiceAvailability = GoogleApiAvailability.getInstance();Exception:
05-23 05:38:48.221 28055-28055/? E/AndroidRuntime: FATAL EXCEPTION: main Process: com.myunityplugin.PushNotifications, PID: 28055 java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/android/gms/common/GoogleApiAvailability; at com.myplugin.unitynotification.GCM.GCM.checkPlayServices(GCM.java:33) at com.myplugin.unitynotification.GCM.MainActivity.onCreate(MainActivity.java:80) at android.app.Activity.performCreate(Activity.java:6550) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1120) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3108) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3263) at android.app.ActivityThread.access$1000(ActivityThread.java:197) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1687) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:145) at android.app.ActivityThread.main(ActivityThread.java:6897) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199) Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.android.gms.common.GoogleApiAvailability" on path: DexPathList[[zip file "/data/app/com.myunityplugin.PushNotifications-1/base.apk"],nativeLibraryDirectories=[/data/app/com.myunityplugin.PushNotifications-1/lib/arm, /vendor/lib, /system/lib]] at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56) at java.lang.ClassLoader.loadClass(ClassLoader.java:511) at java.lang.ClassLoader.loadClass(ClassLoader.java:469) at com.myplugin.unitynotification.GCM.GCM.checkPlayServices(GCM.java:33) at com.myplugin.unitynotification.GCM.MainActivity.onCreate(MainActivity.java:80) at android.app.Activity.performCreate(Activity.java:6550) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1120) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3108) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3263) at android.app.ActivityThread.access$1000(ActivityThread.java:197) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1687) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:145) at android.app.ActivityThread.main(ActivityThread.java:6897) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199) Suppressed: java.lang.ClassNotFoundException: com.google.android.gms.common.GoogleApiAvailability at java.lang.Class.classForName(Native Method) at java.lang.BootClassLoader.findClass(ClassLoader.java:781) at java.lang.BootClassLoader.loadClass(ClassLoader.java:841) at java.lang.ClassLoader.loadClass(ClassLoader.java:504) ... 16 more Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack availableApp Level build.gradle
apply plugin: 'com.android.library' android { compileSdkVersion 23 buildToolsVersion "23.0.2" defaultConfig { minSdkVersion 19 targetSdkVersion 23 versionCode 1 versionName "1.0" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } } dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) testCompile 'junit:junit:4.12' compile 'com.android.support:appcompat-v7:23.2.1' compile 'com.google.android.gms:play-services:8.4.0' compile 'com.google.android.gms:play-services-gcm:8.4.0' provided files('lib-not-include/classes.jar') }Project level gradle.build
// Top-level build file where you can add configuration options common to all sub-projects/modules. buildscript { repositories { jcenter() } dependencies { classpath 'com.android.tools.build:gradle:1.5.0' // NOTE: Do not place your application dependencies here; they belong // in the individual module build.gradle files } } allprojects { repositories { jcenter() } } task clean(type: Delete) { delete rootProject.buildDir }解决方案The aar file doesn't contain the nested (or transitive) dependencies and doesn't have a pom file which describes the dependencies used by the library.
It means that, if you are importing a aar file using a flatDir repo you have to specify the dependencies also in your project.
You should use a maven repository (you have to publish the library in a private or public maven repo), you will not have the same issue.
In this case, gradle downloads the dependencies using the pom file which will contains the dependencies list.这篇关于在aar中找不到类的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!