我的应用出现问题，因此建议您更新Android Studio。 然后我的代码崩溃了(我再也无法选择android view而不是package view)。 因此，我制作了一个新程序包，在其中复制了所有类和所有内容。 我的第一个错误是关于androidx的(因为更新的Adnroid Studio使用的是androidx)。 所以我将android.support ....更改为androidx ...现在，我一直在研究dex文件的问题(例如在路径：DexPathList上找不到类“ androidx.core.app.CoreComponentFactory”) )。 请帮助我，我不知道该怎么办了。

这是我的错误：

2019-12-01 17:14:03.872 9399-9399/? I/cacaphonymappe: Late-enabling -Xcheck:jni

2019-12-01 17:14:03.949 9399-9399/? W/re-initialized>: type=1400 audit(0.0:3903): avc: denied { read } for name="u:object_r:mtk_amslog_prop:s0" dev="tmpfs" ino=8549 scontext=u:r:untrusted_app:s0:c96,c256,c512,c768 tcontext=u:object_r:mtk_amslog_prop:s0 tclass=file permissive=0

2019-12-01 17:14:03.954 9399-9399/? E/libc: Access denied finding property "persist.vendor.sys.activitylog"

2019-12-01 17:14:04.576 9399-9399/com.example.cacaphonymapper W/cacaphonymappe: Bad encoded_array value: Failure to verify dex file '/data/app/com.example.cacaphonymapper-YiYzrnehptkaTruFxJpaGw==/base.apk': Bad encoded_value method type size 7

2019-12-01 17:14:04.587 9399-9399/com.example.cacaphonymapper E/LoadedApk: Unable to instantiate appComponentFactory

java.lang.ClassNotFoundException: Didn't find class "androidx.core.app.CoreComponentFactory" on path: DexPathList[[zip file "/data/app/com.example.cacaphonymapper-YiYzrnehptkaTruFxJpaGw==/base.apk"],nativeLibraryDirectories=[/data/app/com.example.cacaphonymapper-YiYzrnehptkaTruFxJpaGw==/lib/arm64, /system/lib64]]

at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134)

at java.lang.ClassLoader.loadClass(ClassLoader.java:379)

at java.lang.ClassLoader.loadClass(ClassLoader.java:312)

at android.app.LoadedApk.createAppFactory(LoadedApk.java:226)

at android.app.LoadedApk.createOrUpdateClassLoaderLocked(LoadedApk.java:731)

at android.app.LoadedApk.getClassLoader(LoadedApk.java:810)

at android.app.LoadedApk.getResources(LoadedApk.java:1032)

at android.app.ContextImpl.createAppContext(ContextImpl.java:2346)

at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5780)

at android.app.ActivityThread.access$1200(ActivityThread.java:206)

at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1678)

at android.os.Handler.dispatchMessage(Handler.java:106)

at android.os.Looper.loop(Looper.java:193)

at android.app.ActivityThread.main(ActivityThread.java:6702)

at java.lang.reflect.Method.invoke(Native Method)

at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)

at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:911)

Suppressed: java.io.IOException: Failed to open dex files from /data/app/com.example.cacaphonymapper-YiYzrnehptkaTruFxJpaGw==/base.apk because: Bad encoded_array value: Failure to verify dex file '/data/app/com.example.cacaphonymapper-YiYzrnehptkaTruFxJpaGw==/base.apk': Bad encoded_value method type size 7

at dalvik.system.DexFile.openDexFileNative(Native Method)

at dalvik.system.DexFile.openDexFile(DexFile.java:354)

at dalvik.system.DexFile.(DexFile.java:101)

at dalvik.system.DexFile.(DexFile.java:75)

at dalvik.system.DexPathList.loadDexFile(DexPathList.java:394)

at dalvik.system.DexPathList.makeDexElements(DexPathList.java:354)

at dalvik.system.DexPathList.(DexPathList.java:164)

at dalvik.system.BaseDexClassLoader.(BaseDexClassLoader.java:74)

at dalvik.system.BaseDexClassLoader.(BaseDexClassLoader.java:65)

at dalvik.system.PathClassLoader.(PathClassLoader.java:64)

at com.android.internal.os.ClassLoaderFactory.createClassLoader(ClassLoaderFactory.java:73)

at com.android.internal.os.ClassLoaderFactory.createClassLoader(ClassLoaderFactory.java:88)

at android.app.ApplicationLoaders.getClassLoader(ApplicationLoaders.java:74)

at android.app.ApplicationLoaders.getClassLoader(ApplicationLoaders.java:40)

at android.app.LoadedApk.createOrUpdateClassLoaderLocked(LoadedApk.java:727)

... 12 more

2019-12-01 17:14:04.615 9399-9399/com.example.cacaphonymapper D/AndroidRuntime: Shutting down VM

2019-12-01 17:14:04.621 9399-9399/com.example.cacaphonymapper E/AndroidRuntime: FATAL EXCEPTION: main

Process: com.example.cacaphonymapper, PID: 9399

java.lang.RuntimeException: Unable to get provider com.google.firebase.provider.FirebaseInitProvider: java.lang.ClassNotFoundException: Didn't find class "com.google.firebase.provider.FirebaseInitProvider" on path: DexPathList[[zip file "/data/app/com.example.cacaphonymapper-YiYzrnehptkaTruFxJpaGw==/base.apk"],nativeLibraryDirectories=[/data/app/com.example.cacaphonymapper-YiYzrnehptkaTruFxJpaGw==/lib/arm64, /system/lib64]]

at android.app.ActivityThread.installProvider(ActivityThread.java:6427)

at android.app.ActivityThread.installContentProviders(ActivityThread.java:5969)

at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5884)

at android.app.ActivityThread.access$1200(ActivityThread.java:206)

at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1678)

at android.os.Handler.dispatchMessage(Handler.java:106)

at android.os.Looper.loop(Looper.java:193)

at android.app.ActivityThread.main(ActivityThread.java:6702)

at java.lang.reflect.Method.invoke(Native Method)

at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)

at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:911)

Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.firebase.provider.FirebaseInitProvider" on path: DexPathList[[zip file "/data/app/com.example.cacaphonymapper-YiYzrnehptkaTruFxJpaGw==/base.apk"],nativeLibraryDirectories=[/data/app/com.example.cacaphonymapper-YiYzrnehptkaTruFxJpaGw==/lib/arm64, /system/lib64]]

at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134)

at java.lang.ClassLoader.loadClass(ClassLoader.java:379)

at java.lang.ClassLoader.loadClass(ClassLoader.java:312)

at android.app.AppComponentFactory.instantiateProvider(AppComponentFactory.java:121)

at android.app.ActivityThread.installProvider(ActivityThread.java:6411)

at android.app.ActivityThread.installContentProviders(ActivityThread.java:5969)

at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5884)

at android.app.ActivityThread.access$1200(ActivityThread.java:206)

at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1678)

at android.os.Handler.dispatchMessage(Handler.java:106)

at android.os.Looper.loop(Looper.java:193)

at android.app.ActivityThread.main(ActivityThread.java:6702)

at java.lang.reflect.Method.invoke(Native Method)

at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)

at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:911)

Suppressed: java.io.IOException: Failed to open dex files from /data/app/com.example.cacaphonymapper-YiYzrnehptkaTruFxJpaGw==/base.apk because: Bad encoded_array value: Failure to verify dex file '/data/app/com.example.cacaphonymapper-YiYzrnehptkaTruFxJpaGw==/base.apk': Bad encoded_value method type size 7

at dalvik.system.DexFile.openDexFileNative(Native Method)

at dalvik.system.DexFile.openDexFile(DexFile.java:354)

at dalvik.system.DexFile.(DexFile.java:101)

at dalvik.system.DexFile.(DexFile.java:75)

at dalvik.system.DexPathList.loadDexFile(DexPathList.java:394)

at dalvik.system.DexPathList.makeDexElements(DexPathList.java:354)

at dalvik.system.DexPathList.(DexPathList.java:164)

at dalvik.system.BaseDexClassLoader.(BaseDexClassLoader.java:74)

at dalvik.system.BaseDexClassLoader.(BaseDexClassLoader.java:65)

at dalvik.system.PathClassLoader.(PathClassLoader.java:64)

at com.android.internal.os.ClassLoaderFactory.createClassLoader(ClassLoaderFactory.java:73)

at com.android.internal.os.ClassLoaderFactory.createClassLoader(ClassLoaderFactory.java:88)

at android.app.ApplicationLoaders.getClassLoader(ApplicationLoaders.java:74)

at android.app.ApplicationLoaders.getClassLoader(ApplicationLoaders.java:40)

at android.app.LoadedApk.createOrUpdateClassLoaderLocked(LoadedApk.java:727)

at android.app.LoadedApk.getClassLoader(LoadedApk.java:810)

at android.app.LoadedApk.getResources(LoadedApk.java:1032)

at android.app.ContextImpl.createAppContext(ContextImpl.java:2346)

at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5780)

... 8 more

2019-12-01 17:14:04.665 9399-9399/com.example.cacaphonymapper I/Process: Sending signal. PID: 9399 SIG: 9

这是我的成就：

apply plugin: 'com.android.application'

android {

compileSdkVersion 28

buildToolsVersion "29.0.0"

defaultConfig {

applicationId "com.example.cacaphonymapper"

minSdkVersion 26

targetSdkVersion 28

versionCode 1

versionName "1.0"

testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"

}

buildTypes {

release {

minifyEnabled false

proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'

}

}

}

dependencies {

implementation fileTree(dir: 'libs', include: ['*.jar'])

//Basics

implementation 'androidx.appcompat:appcompat:1.1.0'

implementation 'androidx.appcompat:appcompat-resources:1.1.0'

implementation 'androidx.constraintlayout:constraintlayout:1.1.3'

implementation 'com.google.android.material:material:1.0.0'

//Firebase

implementation 'com.google.firebase:firebase-core:17.2.1'

implementation 'com.google.firebase:firebase-firestore:21.3.0'

implementation 'com.google.firebase:firebase-database:19.2.0'

implementation 'com.google.firebase:firebase-storage:19.1.0'

implementation 'com.google.firebase:firebase-auth:19.2.0'

implementation 'com.google.gms:google-services:4.3.3'

//Beacons (place)

implementation 'com.estimote:proximity-sdk:1.0.3'

implementation 'com.estimote:mustard:0.2.1'

implementation 'com.estimote:sdk:1.4.5'

//Graphs

implementation 'com.jjoe64:graphview:4.2.2'

}

非常感谢PS如果您知道在更新之前从代码中找回代码的方法，也许我们也可以做一些事情。