java.lang.ClassNotFoundException : Didn't find class . 应用程序”路径:DexPathList

Question

我正在开发一个聊天应用程序，它适用于 android 21 非常好，但在 SDK 较低的 21 上为 18 或 19 会导致此问题

11-03 01:49:22.676 20966-20966/ E/AndroidRuntime: FATAL EXCEPTION: main Process: , PID: 20966 java.lang.RuntimeException: Unable to instantiate application .Application: java.lang.ClassNotFoundException: Didn't find class ".Application" on path: DexPathList[[zip file "/data/app/d-9.apk"],nativeLibraryDirectories=[/data/app-lib/-9, /vendor/lib, /system/lib]] at android.app.LoadedApk.makeApplication(LoadedApk.java:516) at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4703) at android.app.ActivityThread.access$1600(ActivityThread.java:175) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1368) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:146) at android.app.ActivityThread.main(ActivityThread.java:5602) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.ClassNotFoundException: Didn't find class "dev.karim.dardesh.Application" on path: DexPathList[[zip file "/data/app/dev.karim.dardesh-9.apk"],nativeLibraryDirectories=[/data/app-lib/dev.karim.dardesh-9, /vendor/lib, /system/lib]] at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:67) at java.lang.ClassLoader.loadClass(ClassLoader.java:497) at java.lang.ClassLoader.loadClass(ClassLoader.java:457) at android.app.Instrumentation.newApplication(Instrumentation.java:981) at android.app.LoadedApk.makeApplication(LoadedApk.java:511) at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4703)  at android.app.ActivityThread.access$1600(ActivityThread.java:175)  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1368)  at android.os.Handler.dispatchMessage(Handler.java:102)  at android.os.Looper.loop(Looper.java:146)  at android.app.ActivityThread.main(ActivityThread.java:5602)  at java.lang.reflect.Method.invokeNative(Native Method)  at java.lang.reflect.Method.invoke(Method.java:515)  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)  at dalvik.system.NativeStart.main(Native Method)

并且我覆盖了应用程序类上的Attachbasecontext

public class Application extends android.app.Application{
    @Override
    public void onCreate() {
        super.onCreate();
        Firebase.setAndroidContext(this);
    }

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

并在 gradle 文件中使用:

multiDexEnabled true
    compile 'com.android.support:multidex:1.0.1'

这个gradle文件:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 24
    buildToolsVersion "24.0.3"

    defaultConfig {
        applicationId "pakage.com"
        minSdkVersion 17
        targetSdkVersion 24
        versionCode 18
        versionName "18"
        multiDexEnabled true
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"


        jackOptions {
            enabled true
            additionalParameters('jack.incremental': 'true')
        }
    }

    compileOptions {
        incremental true
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    dexOptions {
        preDexLibraries = false
        javaMaxHeapSize '4096m'
    }

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

        }
    }



    packagingOptions {
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/LICENSE-FIREBASE.txt'
    }




}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    compile 'com.android.support:appcompat-v7:24.2.1'
    compile 'com.firebase:firebase-client-android:2.3.1'
    compile 'com.android.support:design:24.2.1'
    compile 'com.android.support:recyclerview-v7:24.2.1'
    compile 'com.android.support:cardview-v7:24.2.1'
    compile 'com.squareup.picasso:picasso:2.5.0'
    compile 'com.android.support:support-v4:24.2.1'
    compile 'com.google.android.gms:play-services-ads:9.8.0'
    compile 'com.google.firebase:firebase-messaging:9.8.0'
    compile 'com.google.firebase:firebase-auth:9.8.0'
    compile 'com.google.android.gms:play-services:9.8.0'
    compile 'com.google.firebase:firebase-core:9.8.0'
    compile 'com.google.firebase:firebase-database:9.8.0'
    compile 'com.android.support:multidex:1.0.1'
    testCompile 'junit:junit:4.12'
    compile 'com.google.android:support-v4:r7'
}


apply plugin: 'com.google.gms.google-services'

此外，我的项目处理 Firebase 实时数据库:

提示/这里没有任何解决方案可以解决我:

请帮帮我

Answer 1

当我将 Android Studio 更新到 3.0 时，我遇到了同样的问题。如果您也这样做，请改用 2.3 版本。为我工作!!