前言
最近两天开始接公司的热更新sdk，遇到了一个小问题；问题本身并不复杂，但是google了一圈没有能解决我们的问题，因此稍稍记录下；如果后面有人遇到了，希望能提供一种可能的方向；
现象
接热更新sdk时发现了一个现象，宿主包编release包时就会点击直接闪退；但是debug包就不会；这个应该是混淆有关系，但是前面已经接了一个渠道时没问题的，这就有点奇怪了；
报错栈如下
08-25 13:54:47.833 25875 25875 D AndroidRuntime: Shutting down VM
08-25 13:54:47.833 25875 25875 E AndroidRuntime: FATAL EXCEPTION: main
08-25 13:54:47.833 25875 25875 E AndroidRuntime: Process: com.oasis.sdk.huawei, PID: 25875
08-25 13:54:47.833 25875 25875 E AndroidRuntime: java.lang.RuntimeException: Unable to instantiate application com.bytedance.thanoshost.ThanosApplication: java.lang.ClassNotFoundException: Didn't find class "com.bytedance.thanoshost.ThanosApplication" on path: DexPathList[[zip file "/system/framework/org.apache.http.legacy.boot.jar", zip file "/data/app/com.oasis.sdk.huawei-vezpsDPHdzkNzr9l7V_5pQ==/base.apk"],nativeLibraryDirectories=[/data/app/com.oasis.sdk.huawei-vezpsDPHdzkNzr9l7V_5pQ==/lib/arm, /data/app/com.oasis.sdk.huawei-vezpsDPHdzkNzr9l7V_5pQ==/base.apk!/lib/armeabi-v7a, /system/lib, /product/lib]]
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at android.app.LoadedApk.makeApplication(LoadedApk.java:1183)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at android.app.ActivityThread.handleBindApplication(ActivityThread.java:6688)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at android.app.ActivityThread.access$2000(ActivityThread.java:273)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2020)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:112)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at android.os.Looper.loop(Looper.java:216)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:7625)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:524)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:987)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: Caused by: java.lang.ClassNotFoundException: Didn't find class "com.bytedance.thanoshost.ThanosApplication" on path: DexPathList[[zip file "/system/framework/org.apache.http.legacy.boot.jar", zip file "/data/app/com.oasis.sdk.huawei-vezpsDPHdzkNzr9l7V_5pQ==/base.apk"],nativeLibraryDirectories=[/data/app/com.oasis.sdk.huawei-vezpsDPHdzkNzr9l7V_5pQ==/lib/arm, /data/app/com.oasis.sdk.huawei-vezpsDPHdzkNzr9l7V_5pQ==/base.apk!/lib/armeabi-v7a, /system/lib, /product/lib]]
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at android.app.AppComponentFactory.instantiateApplication(AppComponentFactory.java:50)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at android.app.Instrumentation.newApplication(Instrumentation.java:1127)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at android.app.LoadedApk.makeApplication(LoadedApk.java:1175)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: ... 9 more
08-25 13:54:47.833 25875 25875 E AndroidRuntime: Suppressed: java.io.IOException: Failed to open dex files from /data/app/com.oasis.sdk.huawei-vezpsDPHdzkNzr9l7V_5pQ==/base.apk because: Failure to verify dex file '/data/app/com.oasis.sdk.huawei-vezpsDPHdzkNzr9l7V_5pQ==/base.apk': Out-of-order type_ids: 1d3b then 1d3b
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at dalvik.system.DexFile.openDexFileNative(Native Method)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at dalvik.system.DexFile.openDexFile(DexFile.java:354)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at dalvik.system.DexFile.<init>(DexFile.java:101)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at dalvik.system.DexFile.<init>(DexFile.java:75)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at dalvik.system.DexPathList.loadDexFile(DexPathList.java:394)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at dalvik.system.DexPathList.makeDexElements(DexPathList.java:354)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at dalvik.system.DexPathList.<init>(DexPathList.java:164)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at dalvik.system.BaseDexClassLoader.<init>(BaseDexClassLoader.java:74)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at dalvik.system.BaseDexClassLoader.<init>(BaseDexClassLoader.java:65)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at dalvik.system.PathClassLoader.<init>(PathClassLoader.java:64)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at com.android.internal.os.ClassLoaderFactory.createClassLoader(ClassLoaderFactory.java:73)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at com.android.internal.os.ClassLoaderFactory.createClassLoader(ClassLoaderFactory.java:88)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at android.app.ApplicationLoaders.getClassLoader(ApplicationLoaders.java:84)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at android.app.ApplicationLoaders.getClassLoader(ApplicationLoaders.java:40)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at android.app.LoadedApk.createOrUpdateClassLoaderLocked(LoadedApk.java:801)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at android.app.LoadedApk.getClassLoader(LoadedApk.java:884)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at android.app.LoadedApk.getResources(LoadedApk.java:1135)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at android.app.ContextImpl.createAppContext(ContextImpl.java:2623)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: at android.app.ActivityThread.handleBindApplication(ActivityThread.java:6595)
08-25 13:54:47.833 25875 25875 E AndroidRuntime: ... 8 more
google上搜了一圈，虽然有这个报错，但是说的解决方案却不生效，因此这个问题还得进一步分析；
分析
首先看这个报错的位置
bool DexFileVerifier::CheckInterTypeIdItem() {
const DexFile::TypeId* item = reinterpret_cast<const DexFile::TypeId*>(ptr_);
const char* descriptor = dex_file_->StringDataByIdx(item->descriptor_idx_);
// Check that the descriptor is a valid type.
if (!IsValidDescriptor(descriptor)) {
LOG(ERROR) << StringPrintf("Invalid type descriptor: '%s'", descriptor);
return false;
}
// Check ordering between items.
if (previous_item_ != NULL) {
const DexFile::TypeId* prev_item = reinterpret_cast<const DexFile::TypeId*>(previous_item_);
if (prev_item->descriptor_idx_ >= item->descriptor_idx_) {
LOG(ERROR) << StringPrintf("Out-of-order type_ids: %x then %x",
prev_item->descriptor_idx_, item->descriptor_idx_);
return false;
}
}
ptr_ += sizeof(DexFile::TypeId);
return true;
}
很明显了，这是art虚拟机解析dexFile的时候出现了问题，type id重复了，我们把crash的apk中的classes.dex拿出来看下(010Editor配合Dex.bt使用，F5生成解析结果)
dex type解析.png
可以看到有两个a.a.a.a的类型，然后看了下生成的mapping文件，果然有一个类被混淆成了a.a.a.a，那么改变混淆规则应该就可以解决这个问题
-repackageclasses 'g.huawei.thanos'
加上这行后重新编译，问题解决，果然成功进入了apk
总结
为Out-of-order这种报错提供一种可能性，其实还是很简单的一个问题，顺手记录下；
