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我尝试使用 OkHttp 和 Picasso（ 遵循此答案）对我从 Firebase 存储下载的图像进行磁盘缓存。现在，该应用程序会出现异常和崩溃。我看过这些帖子： post 1 ， post 2 但我没有找到任何相关的解决方案。我也尝试清理和重建项目，但没有成功。
这是 build.gradle ：
apply plugin: 'com.android.application'
android {
compileSdkVersion 25
buildToolsVersion "25.0.2"
defaultConfig {
applicationId "social.com.networking.social.media.app"
minSdkVersion 16
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'
multiDexEnabled true
}
}
}
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'
})
compile 'com.android.support:appcompat-v7:25.1.0'
compile 'com.android.support:design:25.1.0'
compile 'br.com.mauker.materialsearchview:materialsearchview:1.2.0'
compile 'com.alirezaafkar:toolbar:1.1.1'
compile 'com.github.mancj:MaterialSearchBar:0.3.5'
compile 'com.squareup.picasso:picasso:2.5.2'
compile 'com.nineoldandroids:library:2.4.0'
compile 'com.daimajia.slider:library:1.1.5@aar'
compile 'com.google.code.gson:gson:2.6.2'
compile 'com.google.firebase:firebase-core:10.0.1'
compile 'com.google.firebase:firebase-ads:10.0.1'
compile 'com.google.firebase:firebase-messaging:10.0.1'
compile "com.google.firebase:firebase-auth:10.0.1"
compile 'com.google.firebase:firebase-storage:10.0.1'
compile 'com.google.firebase:firebase-crash:10.0.1'
compile 'com.squareup.okhttp3:okhttp:3.2.0'
compile 'com.jakewharton.picasso:picasso2-okhttp3-downloader:1.0.2'
compile 'com.android.support:multidex:1.0.1'
compile 'org.parceler:parceler-api:1.1.6'
annotationProcessor 'org.parceler:parceler:1.1.6'
testCompile 'junit:junit:4.12'
}
apply plugin: 'com.google.gms.google-services'
完整的堆栈跟踪：
Process: social.com.networking.social.media.app, PID: 28258
java.lang.NoClassDefFoundError: Failed resolution of: Lcom/squareup/okhttp/OkHttpClient;
at com.squareup.picasso.OkHttpDownloader.defaultOkHttpClient(OkHttpDownloader.java:31)
at com.squareup.picasso.OkHttpDownloader.<init>(OkHttpDownloader.java:76)
at com.squareup.picasso.OkHttpDownloader.<init>(OkHttpDownloader.java:65)
at social.com.networkingsocialmediaapp.Global.onCreate(Global.java:17)
at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1018)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4991)
at android.app.ActivityThread.-wrap1(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1555)
at android.os.Handler.dispatchMessage(Handler.java:111)
at android.os.Looper.loop(Looper.java:207)
at android.app.ActivityThread.main(ActivityThread.java:5776)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679)
Caused by: java.lang.ClassNotFoundException: Didn't find class "com.squareup.okhttp.OkHttpClient" on path: DexPathList[[zip file "/data/app/social.com.networking.social.media.app-2/base.apk"],nativeLibraryDirectories=[/data/app/social.com.networking.social.media.app-2/lib/arm64, /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 com.squareup.picasso.OkHttpDownloader.defaultOkHttpClient(OkHttpDownloader.java:31)
at com.squareup.picasso.OkHttpDownloader.<init>(OkHttpDownloader.java:76)
at com.squareup.picasso.OkHttpDownloader.<init>(OkHttpDownloader.java:65)
at social.com.networkingsocialmediaapp.Global.onCreate(Global.java:17)
at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1018)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4991)
at android.app.ActivityThread.-wrap1(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1555)
at android.os.Handler.dispatchMessage(Handler.java:111)
at android.os.Looper.loop(Looper.java:207)
at android.app.ActivityThread.main(ActivityThread.java:5776)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679)
Suppressed: java.lang.ClassNotFoundException: com.squareup.okhttp.OkHttpClient
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)
... 15 more
Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack trace available
编辑 1： 我已经像 Redman 所说的那样启用了 MultiDex，但它仍然给出相同的错误。根据此： developer.android.com/studio/build/multidex.html#keep ，我需要确定基本 APK 中需要哪些类。我如何确定哪些课程是必需的？
原文由 Shubham Shukla 发布，翻译遵循 CC BY-SA 4.0 许可协议
java
android
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