java - Android Multidex 运行时异常

Question

我正在尝试解决运行具有超过 65k 方法的 Android 应用程序的问题。
我已经关注了有关 Multidex 支持的 Google 文档，但是我仍然无法成功运行它。似乎问题只出现在小于 21 的 SDK 上，因为当我指定 minSdkVersion 21 时，它运行良好，但是一旦我将它设置为 minSdkVersion 15，我就得到了以下异常。

FATAL EXCEPTION: main
   java.lang.RuntimeException: Unable to instantiate application custom.package.name.MyApplication: java.lang.ClassNotFoundException: Didn't find class "custom.package.name.MyApplication" on path: DexPathList[[zip file "/data/app/custom.package.name-2/base.apk"],nativeLibraryDirectories=[/data/app/custom.package.name-2/lib/arm, /vendor/lib, /system/lib]]
      at android.app.LoadedApk.makeApplication(LoadedApk.java:578)
      at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4680)
      at android.app.ActivityThread.-wrap1(ActivityThread.java)
      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1405)
      at android.os.Handler.dispatchMessage(Handler.java:102)
      at android.os.Looper.loop(Looper.java:148)
      at android.app.ActivityThread.main(ActivityThread.java:5417)
      at java.lang.reflect.Method.invoke(Native Method)
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

   Caused by: java.lang.ClassNotFoundException: Didn't find class "custom.package.name.MyApplication" on path: DexPathList[[zip file "/data/app/custom.package.name-2/base.apk"],nativeLibraryDirectories=[/data/app/custom.package.name-2/lib/arm, /vendor/lib, /system/lib]]
      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:981)
      at android.app.LoadedApk.makeApplication(LoadedApk.java:573)
      at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4680) 
      at android.app.ActivityThread.-wrap1(ActivityThread.java) 
      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1405) 
      at android.os.Handler.dispatchMessage(Handler.java:102) 
      at android.os.Looper.loop(Looper.java:148) 
      at android.app.ActivityThread.main(ActivityThread.java:5417) 
      at java.lang.reflect.Method.invoke(Native Method) 
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
   Suppressed: java.io.IOException: Failed to open dex files from /data/app/custom.package.name-2/base.apk
      at dalvik.system.DexFile.openDexFileNative(Native Method)
      at dalvik.system.DexFile.openDexFile(DexFile.java:295)
      at dalvik.system.DexFile.<init>(DexFile.java:80)
      at dalvik.system.DexFile.<init>(DexFile.java:59)
      at dalvik.system.DexPathList.loadDexFile(DexPathList.java:279)
      at dalvik.system.DexPathList.makePathElements(DexPathList.java:248)
      at dalvik.system.DexPathList.<init>(DexPathList.java:120)
      at dalvik.system.BaseDexClassLoader.<init>(BaseDexClassLoader.java:48)
      at dalvik.system.PathClassLoader.<init>(PathClassLoader.java:65)
      at android.app.ApplicationLoaders.getClassLoader(ApplicationLoaders.java:58)
      at android.app.LoadedApk.getClassLoader(LoadedApk.java:376)
      at android.app.LoadedApk.makeApplication(LoadedApk.java:568)
            ... 9 more
   Suppressed: java.lang.ClassNotFoundException: custom.package.name.MyApplication
      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)
            ... 12 more
   Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack trace available

致命异常前的 Logcat

W/art: Failed execv(/system/bin/dex2oat --runtime-arg -classpath --runtime-arg  --instruction-set=arm --instruction-set-features=smp,div,atomic_ldrd_strd --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --instruction-set-variant=krait --instruction-set-features=default --dex-file=/data/app/custom.package.name-2/base.apk --oat-file=/data/dalvik-cache/arm/data@app@custom.package.name-2-2@base.apk@classes.dex) because non-0 exit status
W/art: Failure to verify dex file '/data/app/ccustom.package.name-2-2/base.apk': Invalid method name: '_clinit@1433781298707#0'
W/System: ClassLoader referenced unknown path: /data/app/custom.package.name-2-2/lib/arm

这是我到目前为止所做的:

• 创建了名为 MyApplication 的类，它扩展了 Application 并在 AndroidManifest.xml 文件中指定了它

• 添加对 build.gradle 文件的依赖

  编译 'com.android.support:multidex:1.0.1'

• 在 build.gradle 中启用 multidex

  multiDexEnabled true

• 在 MyApplication 类中启用 multidex
@覆盖
protected void attachBaseContext(上下文基础){
super.attachBaseContext(基础)；
MultiDex.install(这个);
}


在此先感谢您的帮助!

Answer 1

试试这个，这对我有用，几乎是从当前项目中复制的....

build.gradle

android {
compileSdkVersion 23
buildToolsVersion "22.0.1"
defaultConfig {
    applicationId "my.package.name"
    minSdkVersion 16
    targetSdkVersion 23
    multiDexEnabled = true
    versionCode 3
    versionName "0.1.2"
    renderscriptTargetApi 14
    renderscriptSupportModeEnabled true
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:23.1.1'
    compile 'com.android.support:multidex:1.0.1'
}

应用类

public class MyApp extends MultiDexApplication {

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

list

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

...

   <application
    android:name=".MyApp"
    android:allowBackup="true"
    android:hardwareAccelerated="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >

...

值得注意的是，在我添加 READ 权限并扩展 MultiDexApplication 之前，我遇到了类似的问题