我正在开发一个聊天应用程序，它在Android 21上运行良好，但在低于21的SDK版本（如18或19）会导致这个问题。
11-03 01:49:22.676 20966-20966/ E/AndroidRuntime: 致命异常: 主进程 进程: , PID: 20966 java.lang.RuntimeException: 无法实例化应用程序.Application: java.lang.ClassNotFoundException: 在路径上找不到类".Application": 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: 在路径上找不到类"dev.karim.dardesh.Application": 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)并且我在应用程序类上覆盖了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);
}
}
我正在使用gradle文件中的：
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，我的项目涉及Firebase实时数据库：
提示/这里没有任何解决方案：
请帮助我。