由以下原因引起：java.lang.ClassNotFoundException：无法在任何原子 class 加载程序或父 class 加载程序中找到
Caused by: java.lang.ClassNotFoundException: Could not find in any atom class loader or parent class loader
我正在尝试使用 Instant Apps 文档进行一些实验：Android Instant Apps
本机 Android 应用程序，无需安装。 我已按照官方文档中介绍的步骤进行操作。我创建了模拟器 Nexus 5X 来测试即时应用程序功能。
所以，我在我的项目中创建了两个功能，它们非常相似，只是一个演示，以了解即时应用程序的工作原理。它在一个功能上运行良好，现在在我创建了另一个功能之后，现在我有两个功能反过来使我的应用程序崩溃。
05-24 12:07:12.259 12020-12028/? E/art: Failed writing handshake bytes (-1 of 14): Broken pipe
05-24 12:07:15.952 12020-12020/com.williams.instantappdemo E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.williams.instantappdemo, PID: 12020
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.williams.instantappdemo/com.williams.instantappdemo.feature.MainActivity}: java.lang.ClassNotFoundException: could not find com.williams.instantappdemo.feature.MainActivity in any atom class loader or parent class loader
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2567)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Caused by: java.lang.ClassNotFoundException: could not find com.williams.instantappdemo.feature.MainActivity in any atom class loader or parent class loader
at com.google.android.instantapps.supervisor.loader.WhAppClassLoader.loadClass(WhAppClassLoader.java:100)
at android.app.Instrumentation.newActivity(Instrumentation.java:1078)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2557)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Suppressed: java.lang.ClassNotFoundException: Didn't find class "com.williams.instantappdemo.feature.MainActivity" on path: DexPathList[[directory "."],nativeLibraryDirectories=[/system/lib, /vendor/lib, /system/lib, /vendor/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:380)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
at com.google.android.instantapps.supervisor.loader.WhAppClassLoader.loadClass(WhAppClassLoader.java:85)
... 11 more
Suppressed: java.lang.ClassNotFoundException: Didn't find class "com.williams.instantappdemo.feature.MainActivity" on path: DexPathList[[zip file "/data/user/0/com.google.android.instantapps.supervisor/files/atom-cache/com.williams.instantappdemo/atom-download--base-1495607829279/base.jar"],nativeLibraryDirectories=[/data/user/0/com.google.android.instantapps.supervisor/files/native-lib/com.williams.instantappdemo, /system/lib, /vendor/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at com.google.android.instantapps.supervisor.loader.DexFirstClassLoader.doLoadClass(DexFirstClassLoader.java:50)
at com.google.android.instantapps.supervisor.loader.WhAppClassLoader.loadClass(WhAppClassLoader.java:92)
... 11 more
Suppressed: java.lang.ClassNotFoundException: Didn't find class "com.williams.instantappdemo.feature.MainActivity" on path: DexPathList[[zip file "/data/user/0/com.google.android.instantapps.supervisor/files/atom-cache/com.williams.instantappdemo/atom-download--feature-1495607829279/feature.jar"],nativeLibraryDirectories=[/data/user/0/com.google.android.instantapps.supervisor/files/native-lib/com.williams.instantappdemo, /system/lib, /vendor/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at com.google.android.instantapps.supervisor.loader.DexFirstClassLoader.doLoadClass(DexFirstClassLoader.java:50)
at com.google.android.instantapps.supervisor.loader.WhAppClassLoader.loadClass(WhAppClassLoader.java:92)
... 11 more
这里是build.gradle的功能模块：
apply plugin: 'com.android.feature'
android {
compileSdkVersion 25
buildToolsVersion rootProject.buildToolsVersion
defaultConfig {
minSdkVersion 23
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'
})
implementation project(':base')
testCompile 'junit:junit:4.12'
}
这是特征 2 的 build.gradle：
apply plugin: 'com.android.feature'
android {
compileSdkVersion 25
buildToolsVersion rootProject.buildToolsVersion
defaultConfig {
minSdkVersion 23
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'
})
implementation project(':base')
testCompile 'junit:junit:4.12'
}
这是基本模块的build.gradle：
apply plugin: 'com.android.feature'
android {
compileSdkVersion 25
buildToolsVersion rootProject.buildToolsVersion
baseFeature true
defaultConfig {
minSdkVersion 23
targetSdkVersion 25
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
feature project(':feature')
compile 'com.android.support:appcompat-v7:25.+'
compile 'com.android.support.constraint:constraint-layout:1.0.2'
feature project(":feature1")
}
这里是应用模块的build.gradle：
apply plugin: 'com.android.application'
android {
compileSdkVersion 25
buildToolsVersion rootProject.buildToolsVersion
defaultConfig {
applicationId "com.nagarro.instantappdemo"
minSdkVersion 23
targetSdkVersion 25
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation project(':feature')
implementation project(':feature1')
implementation project(':base')
}
谁能指出我做错了什么？
看起来实际的 activity 包与包含 MainActivity 的功能的清单文件中的内容不匹配。当将活动重构到新包中并且不使用清单中活动的相对路径时，这是一个常见错误。完全限定路径绝对肯定
<activity android:name="com.williams.instantappdemo.feature.MainActivity"/>
使用 Apk Analyzer 检查 apk 文件 (build/outputs/apks)，看看它是否在那个确切的包中有 com.williams.instantappdemo.feature.MainActivity。
您还可以使用 Merged Manifest view 检查您的最终清单（应用程序模块）以验证一切正常。
此外，将应用程序项目(":app") 添加到基本功能模块，以便它使用在您的应用程序模块中定义的 applicationId 来打包您的 app/instant 应用程序
更新：
使用上述技术，我调查了合并的清单并发现了一个问题。构建插件忽略了模块名称中的数字 (feature1)，因此这两个功能最终具有相同的名称。这导致了一系列问题，包括 ActivityNotFound 错误。将 feature1 模块重命名为 featureOne 解决了这个问题。
我正在尝试使用 Instant Apps 文档进行一些实验：Android Instant Apps 本机 Android 应用程序，无需安装。 我已按照官方文档中介绍的步骤进行操作。我创建了模拟器 Nexus 5X 来测试即时应用程序功能。
所以，我在我的项目中创建了两个功能，它们非常相似，只是一个演示，以了解即时应用程序的工作原理。它在一个功能上运行良好，现在在我创建了另一个功能之后，现在我有两个功能反过来使我的应用程序崩溃。
05-24 12:07:12.259 12020-12028/? E/art: Failed writing handshake bytes (-1 of 14): Broken pipe
05-24 12:07:15.952 12020-12020/com.williams.instantappdemo E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.williams.instantappdemo, PID: 12020
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.williams.instantappdemo/com.williams.instantappdemo.feature.MainActivity}: java.lang.ClassNotFoundException: could not find com.williams.instantappdemo.feature.MainActivity in any atom class loader or parent class loader
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2567)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Caused by: java.lang.ClassNotFoundException: could not find com.williams.instantappdemo.feature.MainActivity in any atom class loader or parent class loader
at com.google.android.instantapps.supervisor.loader.WhAppClassLoader.loadClass(WhAppClassLoader.java:100)
at android.app.Instrumentation.newActivity(Instrumentation.java:1078)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2557)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Suppressed: java.lang.ClassNotFoundException: Didn't find class "com.williams.instantappdemo.feature.MainActivity" on path: DexPathList[[directory "."],nativeLibraryDirectories=[/system/lib, /vendor/lib, /system/lib, /vendor/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:380)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
at com.google.android.instantapps.supervisor.loader.WhAppClassLoader.loadClass(WhAppClassLoader.java:85)
... 11 more
Suppressed: java.lang.ClassNotFoundException: Didn't find class "com.williams.instantappdemo.feature.MainActivity" on path: DexPathList[[zip file "/data/user/0/com.google.android.instantapps.supervisor/files/atom-cache/com.williams.instantappdemo/atom-download--base-1495607829279/base.jar"],nativeLibraryDirectories=[/data/user/0/com.google.android.instantapps.supervisor/files/native-lib/com.williams.instantappdemo, /system/lib, /vendor/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at com.google.android.instantapps.supervisor.loader.DexFirstClassLoader.doLoadClass(DexFirstClassLoader.java:50)
at com.google.android.instantapps.supervisor.loader.WhAppClassLoader.loadClass(WhAppClassLoader.java:92)
... 11 more
Suppressed: java.lang.ClassNotFoundException: Didn't find class "com.williams.instantappdemo.feature.MainActivity" on path: DexPathList[[zip file "/data/user/0/com.google.android.instantapps.supervisor/files/atom-cache/com.williams.instantappdemo/atom-download--feature-1495607829279/feature.jar"],nativeLibraryDirectories=[/data/user/0/com.google.android.instantapps.supervisor/files/native-lib/com.williams.instantappdemo, /system/lib, /vendor/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at com.google.android.instantapps.supervisor.loader.DexFirstClassLoader.doLoadClass(DexFirstClassLoader.java:50)
at com.google.android.instantapps.supervisor.loader.WhAppClassLoader.loadClass(WhAppClassLoader.java:92)
... 11 more
这里是build.gradle的功能模块：
apply plugin: 'com.android.feature'
android {
compileSdkVersion 25
buildToolsVersion rootProject.buildToolsVersion
defaultConfig {
minSdkVersion 23
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'
})
implementation project(':base')
testCompile 'junit:junit:4.12'
}
这是特征 2 的 build.gradle：
apply plugin: 'com.android.feature'
android {
compileSdkVersion 25
buildToolsVersion rootProject.buildToolsVersion
defaultConfig {
minSdkVersion 23
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'
})
implementation project(':base')
testCompile 'junit:junit:4.12'
}
这是基本模块的build.gradle：
apply plugin: 'com.android.feature'
android {
compileSdkVersion 25
buildToolsVersion rootProject.buildToolsVersion
baseFeature true
defaultConfig {
minSdkVersion 23
targetSdkVersion 25
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
feature project(':feature')
compile 'com.android.support:appcompat-v7:25.+'
compile 'com.android.support.constraint:constraint-layout:1.0.2'
feature project(":feature1")
}
这里是应用模块的build.gradle：
apply plugin: 'com.android.application'
android {
compileSdkVersion 25
buildToolsVersion rootProject.buildToolsVersion
defaultConfig {
applicationId "com.nagarro.instantappdemo"
minSdkVersion 23
targetSdkVersion 25
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation project(':feature')
implementation project(':feature1')
implementation project(':base')
}
谁能指出我做错了什么？
看起来实际的 activity 包与包含 MainActivity 的功能的清单文件中的内容不匹配。当将活动重构到新包中并且不使用清单中活动的相对路径时，这是一个常见错误。完全限定路径绝对肯定
<activity android:name="com.williams.instantappdemo.feature.MainActivity"/>
使用 Apk Analyzer 检查 apk 文件 (build/outputs/apks)，看看它是否在那个确切的包中有 com.williams.instantappdemo.feature.MainActivity。
您还可以使用 Merged Manifest view 检查您的最终清单（应用程序模块）以验证一切正常。
此外，将应用程序项目(":app") 添加到基本功能模块，以便它使用在您的应用程序模块中定义的 applicationId 来打包您的 app/instant 应用程序
更新：
使用上述技术，我调查了合并的清单并发现了一个问题。构建插件忽略了模块名称中的数字 (feature1)，因此这两个功能最终具有相同的名称。这导致了一系列问题，包括 ActivityNotFound 错误。将 feature1 模块重命名为 featureOne 解决了这个问题。