致命异常:java.lang.NoClassDefFoundError:android.support.v7.app.AppCompatDelegateImplV23

Question

在我的最新版本中,我的一些用户(不到0.2%)因为android.support.v7.app.AppCompatDelegateImplV23无法找到而崩溃.我无法重现这个问题,我只收到关于崩解的报道.我用apktool从我的apk中提取文件,我可以AppCompatDelegateImplV23.smali在那里看到.知道会发生什么吗？

这是我在gradle上的编译行:

compile 'com.android.support:appcompat-v7:23+'

这是例外:

Fatal Exception: java.lang.NoClassDefFoundError: android.support.v7.app.AppCompatDelegateImplV23
       at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:133)
       at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:117)
       at android.support.v7.app.AppCompatActivity.getDelegate(AppCompatActivity.java:456)
       at android.support.v7.app.AppCompatActivity.onCreate(AppCompatActivity.java:59)
       at MyActivityClass.onCreate(MyActivityClass.java:353)
       at android.app.Activity.performCreate(Activity.java:6248)
       at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1125)
       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2437)
       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2544)
       at android.app.ActivityThread.access$900(ActivityThread.java:150)
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1394)
       at android.os.Handler.dispatchMessage(Handler.java:102)
       at android.os.Looper.loop(Looper.java:168)
       at android.app.ActivityThread.main(ActivityThread.java:5845)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:797)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:687)
       at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:117)

编辑:这是我的主要gradle文件:

buildscript {
    repositories {
        maven { url 'https://maven.fabric.io/public' }
        jcenter() // version plugin support

    }

    dependencies {
        classpath 'io.fabric.tools:gradle:1.+'
        classpath 'com.android.tools.build:gradle:1.3.1'

    }
    allprojects {
        repositories {
            jcenter()
        }
    }
}
apply plugin: 'com.android.application'
apply plugin: 'io.fabric'
apply plugin: 'com.google.gms.google-services'


repositories {
    maven { url 'https://maven.fabric.io/public' }
}


android {
    signingConfigs {
        config {
......
        }
    }
    compileSdkVersion 23
    buildToolsVersion "23.0.1"
    useLibrary 'org.apache.http.legacy'

    productFlavors {
        // Define separate dev and prod product flavors.
        dev {
            // dev utilizes minSDKVersion = 21 to allow the Android gradle plugin
            // to pre-dex each module and produce an APK that can be tested on
            // Android Lollipop without time consuming dex merging processes.
            minSdkVersion 21
        }
        prod {
            // The actual minSdkVersion for the application.
            minSdkVersion 14
        }
    }
    defaultConfig {
        applicationId "mypackage"
        minSdkVersion 14
        targetSdkVersion 23
        versionCode some number
        versionName "some version number"
        multiDexEnabled true
        signingConfig signingConfigs.config

    }


    buildTypes {
        release {
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            signingConfig signingConfigs.config
            applicationVariants.all { variant ->
                variant.outputs.each { output ->
                    output.outputFile = new File(output.outputFile.parent,"myapk.apk")

                }
            }
        }
        debug {
            signingConfig signingConfigs.config
        }

    }
    repositories {
        mavenCentral()
        mavenLocal()
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_7
        targetCompatibility JavaVersion.VERSION_1_7

    }
    packagingOptions {
        exclude 'AndroidManifest.xml'
        exclude 'META-INF/beans.xml'
        exclude 'META-INF/LICENSE.txt'
        exclude 'META-INF/NOTICE.txt'
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/DEPENDENCIES'
    }
    productFlavors {
    }
    dexOptions {
     //   preDexLibraries = false
        jumboMode = true
        javaMaxHeapSize "2g"
        //doesn't seem to be supported with multidex
       //   incremental true

    }
    lintOptions{
        disable 'MissingTranslation'
        disable 'ExtraTranslation'
    }
}

dependencies {

    compile fileTree(dir: 'libs', include: ['*.jar'])
    //multidex
    compile 'com.android.support:multidex:1.0.0'
    //support libs
    compile 'com.android.support:support-v4:23+'
    compile 'com.android.support:appcompat-v7:23+'
    compile 'com.android.support:cardview-v7:23+'
    compile 'com.android.support:design:23+'

    //app invites
    compile 'com.google.android.gms:play-services-appinvite:8+'

    compile 'com.google.android.gms:play-services-analytics:8+'
    //chromecast
    compile 'com.google.android.gms:play-services-cast:8+'
    compile 'com.android.support:mediarouter-v7:23+'

    //plus button
    compile 'com.google.android.gms:play-services-plus:8+'
    compile('com.crashlytics.sdk.android:crashlytics:2.5.5@aar') {
        transitive = true;
    }


    compile 'com.github.navasmdc:MaterialDesign:1.+@aar'


    //material lib needs it
    compile 'com.nineoldandroids:library:2.4.+'


    compile 'com.facebook.stetho:stetho:1+'
    compile 'com.facebook.stetho:stetho-okhttp:1+'



    //debugCompile 'com.squareup.leakcanary:leakcanary-android:1+'
    debugCompile 'com.squareup.leakcanary:leakcanary-android-no-op:1+'
    releaseCompile 'com.squareup.leakcanary:leakcanary-android-no-op:1+'

    compile 'com.makeramen:dragsortadapter:1.3+'

    compile 'com.github.amlcurran.showcaseview:library:5.0.0'


}

编辑:刚刚有一个新的报告,但对于同一个类的不同版本

Fatal Exception: java.lang.NoClassDefFoundError: android.support.v7.app.AppCompatDelegateImplV14
       at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:135)
       at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:117)
       at android.support.v7.app.AppCompatActivity.getDelegate(AppCompatActivity.java:456)
       at android.support.v7.app.AppCompatActivity.onCreate(AppCompatActivity.java:59)
       at MyActivity.onCreate(MyActivity.java:353)
       at android.app.Activity.performCreate(Activity.java:5008)
       at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2044)
       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2105)
       at android.app.ActivityThread.access$600(ActivityThread.java:133)
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1211)
       at android.os.Handler.dispatchMessage(Handler.java:99)
       at android.os.Looper.loop(Looper.java:137)
       at android.app.ActivityThread.main(ActivityThread.java:4795)
       at java.lang.reflect.Method.invokeNative(Method.java)
       at java.lang.reflect.Method.invoke(Method.java:511)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
       at dalvik.system.NativeStart.main(NativeStart.java)

编辑:我刚刚浏览了很多报告,有些是针对的AppCompatDelegateImplV23,有些是针对的AppCompatDelegateImplV14,有些涉及XPosed但大多数都没有.他们所有人都喜欢的一件事是,他们都是根植电话.

Answer 1

首先，我们需要了解为什么 会出现java.lang.NoClassDefFoundError错误：

所以答案是，当你的代码依赖一个类文件并且它在编译时存在但在运行时找不到时。查找构建时间和运行时类路径中的差异。

因此，有一些选项可以消除此错误：

1)使 preDexLibraries 为 true:

 dexOptions {
        preDexLibraries = true
        jumboMode = true
        javaMaxHeapSize "2g"
        //doesn't seem to be supported with multi dex
       //   incremental true
    }

2）增量构建系统可能有问题。因此，请尝试从项目中删除构建文件夹并重新构建项目或Right click on your project -> "Open module settings" -> Dependencies tab -> check if Export is checked for your library

3）你需要做的不仅仅是提供MultiDex支持。

• defaultConfig 块中的 multiDexEnabled = true
• 在依赖项中包含编译'com.android.support:multidex:1.0.0'
• 让您的应用程序类扩展 MultiDexApplication 而不仅仅是应用程序。或者，您可以在应用程序的 AttachBaseContext() 中调用 MultiDex.install()

如需更多参考，您可以查看以下链接，该链接提供了对 multi dex 的更深入的了解。

https://developer.android.com/tools/building/multidex.html

4）或者最后你可以将V7的jar文件添加到项目的libs文件夹中，然后将其添加到你的构建系统中。

5）还尝试删除jar文件，因为它仍然包含com.android.support:support-v4:23+，因为gradle有一个存储库，它可以下载像compile'c​​ompile'c​​om.android.support:appcompat这样的jar文件-v7:23+'

希望这能为您提供有关错误的一些线索。