Question

我已将项目的minSdkVersion从19更新为21.这导致5.0 / 5.1设备上的问题，我无法运行该应用程序。我一直在我的Application类上得到一个ClassNotFoundException。完整日志，应用程序类和gradle文件如下所示。如果我将我的项目还原为minSdkVersion 19，那么应用程序将在4.4+上运行，没有任何问题。

我尝试了什么

清洁/重建
更新和降级构建工具版本
所有支持库的跨项目都有相同的版本号
使我所有的清单类相对而绝对
更新了所有Sdk和构建工具

日志

04-27 14:37:07.152 6278-6278/? E/AndroidRuntime: FATAL EXCEPTION: main
     Process: com.package.testapp, PID: 6278
     java.lang.RuntimeException: Unable to instantiate application com.package.TestApplication: java.lang.ClassNotFoundException: Didn't find class "com.package.Application" on path: DexPathList[[zip file "/data/app/com.package.testapp-1/base.apk"],nativeLibraryDirectories=[/data/app/com.package.testapp-1/lib/x86_64, /vendor/lib64, /system/lib64]]
         at android.app.LoadedApk.makeApplication(LoadedApk.java:563)
         at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4526)
         at android.app.ActivityThread.access$1500(ActivityThread.java:151)
         at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1364)
         at android.os.Handler.dispatchMessage(Handler.java:102)
         at android.os.Looper.loop(Looper.java:135)
         at android.app.ActivityThread.main(ActivityThread.java:5254)
         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:903)
         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
      Caused by: java.lang.ClassNotFoundException: Didn't find class "com.package.TestApplication" on path: DexPathList[[zip file "/data/app/com.package.testapp-1/base.apk"],nativeLibraryDirectories=[/data/app/com.package.testapp-1/lib/x86_64, /vendor/lib64, /system/lib64]]
         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 android.app.Instrumentation.newApplication(Instrumentation.java:980)
         at android.app.LoadedApk.makeApplication(LoadedApk.java:558)
         at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4526) 
         at android.app.ActivityThread.access$1500(ActivityThread.java:151) 
         at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1364) 
         at android.os.Handler.dispatchMessage(Handler.java:102) 
         at android.os.Looper.loop(Looper.java:135) 
         at android.app.ActivityThread.main(ActivityThread.java:5254) 
         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:903) 
         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698) 
        Suppressed: java.lang.ClassNotFoundException: com.package.testapp.welcome.TestClaimApplication
         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)
                ... 13 more
      Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available

摇篮

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

    dependencies {
        classpath 'io.fabric.tools:gradle:1.+'
    }
    }

    apply plugin: 'com.android.application'
    apply plugin: 'io.fabric'

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

android {

    compileSdkVersion 25
    buildToolsVersion '25.0.3'

    defaultConfig {
        applicationId "com.package.testapp"
        minSdkVersion 21
        multiDexEnabled = true
        targetSdkVersion 25
        versionCode 2
        versionName "0.7"
        renderscriptTargetApi 18 // support mode not supported 21+
        renderscriptSupportModeEnabled true
        testInstrumentationRunner 
    "android.support.test.runner.AndroidJUnitRunner"
    }
    dexOptions {
        javaMaxHeapSize "4g"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    lintOptions {
        checkReleaseBuilds false
        abortOnError false
    }

    productFlavors {
        companylocal
        companymaven
    }
}

dependencies {


    def ext = rootProject.ext;

    compile fileTree(include: ['*.jar'], dir: 'libs')
    compile "com.android.support:appcompat-v7:${ext.supportLibraryVersion}"
    compile "com.android.support:design:${ext.supportLibraryVersion}"
    compile 'com.romandanylyk:pageindicatorview:0.0.9'
    compile "com.jakewharton:butterknife:${ext.butterknifeLibraryVersion}"
    annotationProcessor "com.jakewharton:butterknife-compiler:${ext.butterknifeLibraryVersion}"
    compile "uk.co.chrisjenx:calligraphy:2.2.0"
    compile 'com.android.support:multidex:1.0.1'
    // Crashlytics Kit - for crash handling
    compile('com.crashlytics.sdk.android:crashlytics:2.5.2@aar') {
        transitive = true
    }
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })

    testCompile 'junit:junit:4.12'
    testCompile 'org.robolectric:robolectric:3.0'
    testCompile "com.squareup.okhttp3:mockwebserver:${ext.okHttp3LibraryVersion}"
    testCompile('com.squareup.assertj:assertj-android:1.1.1') {
        exclude module: 'support-annotations'
    }
}

应用

public class TestApplication extends Application {

    Engine engine;

    @Override
    public void onCreate() {
        super.onCreate();

        String privateServerUrlLocal = getString(R.string.server_url);
        ProfileLauncher profileLauncher = getProfileLauncher();
        LoginLauncher loginLauncher = getLoginLauncher();

        // Set up Crash Analytics
        final CrashlyticsCore crashlyticsCore = new CrashlyticsCore.Builder().disabled(DEBUG).build();
        Fabric.with(this, new Crashlytics.Builder().core(crashlyticsCore).build());

        Intent intent = new Intent(this, LogoutService.class);
        startService(intent);

        CertificatePinner certificatePinner = new CertificatePinner.Builder()
                .add("")
                .add("")
                .build();

        engine = new Engine.Builder(privateServerUrlLocal, getString(R.string.other_server_url))
                .setCertificatePinner(certificatePinner)
                .setSDKPartnerSetupManager(getSdkPartnerManager())
                .setLogoutActionHandler(getLogoutActionHandler())
                .setVLocationManager(new VLocationManagerImp())
                .setDebug(DEBUG)
                .addDeepLinkHandler(new ClaimDeepLinkHandler(loginLauncher, profileLauncher))
                .addDeepLinkHandler(new LinkGiftCodeDeeplinkHandler(loginLauncher, profileLauncher))
                .addDeepLinkHandler(new OpenLinkDeepLinkHandler())
                .addDeepLinkHandler(new DetailsDeepLinkHandler())
                .addClaimConfig(new ClaimConfig(false, false, false, false, true))
                .build();
        engine.startup(this);
    }



    @Override
    protected void attachBaseContext(Context base) {
        super.attachBaseContext(base);
        MultiDex.install(base);
    }

}

清单

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.package.testapp">

<uses-feature
    android:name="android.hardware.camera"
    android:required="true" />
<uses-feature
    android:name="android.hardware.camera.autofocus"
    android:required="false" />
<uses-feature
    android:name="android.hardware.camera.flash"
    android:required="false" />

<!-- Required for g+ login -->
<uses-permission android:name="android.permission.CAMERA" />

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

    <application
        android:name=".TestApplication"
        android:allowBackup="false"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <service
            android:name="com.package.companycommon.ui.LogoutService"
            android:stopWithTask="true" />

        <activity
            android:name=".LaunchActivity"
            android:screenOrientation="portrait"
            android:theme="@style/AppTheme.NoActionBar">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <activity
            android:name=".welcome.WelcomeActivity"
            android:screenOrientation="portrait"
            android:theme="@style/AppTheme.NoActionBar.ClearStatus" />
        <activity
            android:name=".RegisterActivity"
            android:screenOrientation="portrait"
            android:theme="@style/AppTheme.NoActionBar.ClearStatus"
            android:windowSoftInputMode="adjustResize" />
        <activity
            android:name=".LoginActivity"
            android:screenOrientation="portrait"
            android:theme="@style/AppTheme.NoActionBar.ClearStatus"
            android:windowSoftInputMode="adjustResize" />
        <activity
            android:name=".ActivationActivity"
            android:screenOrientation="portrait"
            android:theme="@style/AppTheme.NoActionBar.ClearStatus"
            android:windowSoftInputMode="adjustResize" />
        <activity
            android:name=".AddPhoneNumberActivity"
            android:screenOrientation="portrait"
            android:theme="@style/AppTheme.NoActionBar.ClearStatus"
            android:windowSoftInputMode="adjustResize" />
        <activity
            android:name=".ForgotPasswordActivity"
            android:screenOrientation="portrait"
            android:theme="@style/AppTheme.NoActionBar.ClearStatus"
            android:windowSoftInputMode="adjustResize" />
        <activity
            android:name=".GiftHistoryActivity"
            android:screenOrientation="portrait"
            android:theme="@style/AppTheme.NoActionBar.ClearStatus" />
        <activity
            android:name="com.package.PartnerLoginHiddenActivity"
            android:screenOrientation="portrait"
            android:theme="@style/AppTheme.NoActionBar.ClearStatus" />
        <activity
            android:name=".tutorial.TutorialActivity"
            android:screenOrientation="portrait"
            android:theme="@style/AppTheme.NoActionBar.ClearStatus" />
        <activity
            android:name=".CreateNewPasswordActivity"
            android:screenOrientation="portrait"
            android:theme="@style/AppTheme.NoActionBar.ClearStatus" />
        <activity
            android:name=".settings.SettingsActivity"
            android:screenOrientation="portrait">
            <meta-data
                android:name="android.support.PARENT_ACTIVITY"
                android:value=".GiftHistoryActivity" />
        </activity>
        <activity
            android:name=".settings.ExtraSettingsActivity"
            android:label="@string/settings"
            android:screenOrientation="portrait">
            <meta-data
                android:name="android.support.PARENT_ACTIVITY"
                android:value=".settings.SettingsActivity" />
        </activity>
        <activity
            android:name="companyapp.company.NewsActivity"
            android:label="@string/notifications"
            android:screenOrientation="portrait"
            android:theme="@style/AppTheme" />
        <activity
            android:name=".termsandconditions.CompanyTermsAndConditionsActivity"
            android:screenOrientation="portrait"
            android:theme="@style/AppTheme" />

        <activity
            android:name="com.package.companycommon.ui.PhotoViewerActivity"
            android:screenOrientation="portrait"
            android:theme="@style/AppTheme" />

        <activity
            android:name="com.package.company.details.CompanyDetailActivity"
            android:screenOrientation="portrait"
            android:theme="@style/AppTheme" />
        <activity
            android:name="com.package.company.details.CompanyDetailActivityLocation"
            android:screenOrientation="portrait"
            android:theme="@style/AppTheme">
            <meta-data
                android:name="android.support.PARENT_ACTIVITY"
                android:value="com.package.company.details.CompanyDetailActivity" />
        </activity>
        <activity
            android:name="com.package.company.ClaimActivity"
            android:theme="@style/AppTheme.NoActionBar"
            tools:replace="android:theme" />
    </application>

</manifest>

Answer 1

当针对api 21时，编译器会读取100个dex文件的限制。因此，我发现一个简单的解决方案是将其添加到gradle文件中的dexOptions中。这会将所有dex文件合并到尽可能低的数量。

在build.gradle文件中添加以下内容

android {
    ...
    dexOptions {
        preDexLibraries = false
    }
}

Answer 2

请尝试停用即时运行选项，然后运行该应用。在尝试了很多解决方案之后，它对我有用，我终于解决了这个问题。

Answer 3

这意味着您的multiDex无法正常工作，因此缺少某些文件。我认为android 5.0有不同的方式来使用multiDex。您是否覆盖了Aplication类中的某些内容？

Answer 4

尝试删除compile 'com.android.support:multidex:1.0.1'。谷歌文档 says

因此，如果您的minSdkVersion为21或更高，则不需要multidex支持库。

我不确定这是否有帮助，但可能值得尝试。

Answer 5

出于某种原因，这个课不再是你的主要的dex了。

Declare the class in the main-classes list，使用multiDexKeepFile（在gradle中列出类）或multiDexKeepProguard（指向主类的特定proguard文件）。

Answer 6

尝试启用Progaud并禁用multidex。

您不仅可以解决此问题，还可以使用更小的apk来加快安装和运行时间。

注意，如果您需要帮助，请发表评论，我们可以解决。

好的，所以它不是Progaurd或MultiDex

错误是缺少com.package.Application。您发布的代码（或清单）都没有包含对该类的引用。你在哪里定义com.package.Application？如果你不是在你的项目中被引用的地方？（我会在项目范围内搜索“com.package.Application”来解开这个。）

Answer 7

尝试在manifest-

中提供完整路径

  <application
        android:name=".TestApplication"

同时手动删除构建文件夹 - 有时干净不起作用。也可以手动卸载应用程序并启动。

Answer 8

我已经从您的代码和配置中创建了demo，并且它在marshmallow下面工作了

下载并检查并与您的代码进行比较。还有一件事是你如何使用包名com.package.testapp创建项目。我无法使用相同的包名创建项目

Answer 9

您需要启用multidex吗？我一直遇到问题。如果您仍然达到65k方法限制，我总是理解multidex用作最后的手段。如果您没有遇到此方法限制，则不需要multidex。如果你遇到这个限制，我建议先使用progaurd来解决这个问题。如果使用proguard后仍然高于方法限制，则使用multidex。

Answer 10

你需要添加你的android：name这样的完整路径。

android:name="android.support.multidex.MultiDexApplication"

您的TestApplication应该扩展MultiDexApplication。

根据文档，如果需要更多详细信息，请参阅。 MultiDex Documentation

Android 5.x ClassNotFoundException在6.0+上运行正常

10 个答案: