error package com android annotations does not exist

Question

I have the following class  import com android annotations NonNullByDefault    NonNullByDefault public final class Log               and here is my build gradle file  some parts omitted   apply plugin   com android application   android       compileSdkVersion 25     buildToolsVersion  24 0 1       defaultConfig           minSdkVersion 16         targetSdkVersion 25         versionCode 2         versionName  0 2             compileOptions           sourceCompatibility JavaVersion VERSION 1 7         targetCompatibility JavaVersion VERSION 1 7           dependencies           compile  com android support appcompat-v7 25 0 0      compile  com android support support-annotations 25 0 0      compile  com android support design 25 0 0      In Android Studio there is no warning raised for my class    However when I try to build and run my app I get this error from gradle  Information Gradle tasks   app clean   app generateDebugSources   app generateDebugAndroidTestSources   app mockableAndroidJar   app prepareDebugUnitTestDependencies   app assembleDebug  Warning  options  bootstrap class path not set in conjunction with -source 1 7  home puter git-repos TaskManager3 app src main java com treemetrics taskmanager3 util Log java Error  3  31  error  package com android annotations does not exist Error  7  2  error  cannot find symbol class NonNullByDefault Error Execution failed for task   app compileDebugJavaWithJavac    gt  Compilation failed  see the compiler error output for details  Information BUILD FAILED Information Total time  21 021 secs Information 3 errors Information 1 warning Information See complete output in console

User · Answer

To automatically fix all android to androidx issues for React Native (prerequisite npx)

Add the following two flags to true in your gradle.properties file at ProjectFolder/android/gradle.properties

android.useAndroidX=true
android.enableJetifier=true

Execute

npm install --save-dev jetifier
npx jetify
npx react-native run-android

In your package.json add the following to scripts

  "postinstall" : "npx jetify"

More info at https://github.com/mikehardy/jetifier

Update: This is now in-built in react-native 0.60. If you migrate to react-native 0.60 you won't need this step. - https://facebook.github.io/react-native/blog/2019/07/03/version-60#androidx-support

User · Answer

Open gradle properties and use following code   android useAndroidX false android enableJetifier false    or U can use these dependencies too   implementation  androidx appcompat appcompat 1 0 2   implementation  androidx annotation annotation 1 0 2

User · Answer

Use implementation androidx appcompat appcompat 1 0 2 in gradle and then   change import android support annotation Nullable   to import androidx annotation NonNull  in the classes imports

User · Answer

In my case I had to use  import androidx annotation      instead of  import android annotation      I migrated to AndroidX and forgot to change that

User · Answer

You shouldn t edit any code manually jetify should do this job for you  if you are running building from cli using react-native you dont  need to do anything but if you are running building Andriod studio you need to run jetify as pre-build  here is how can you automate this    1- From the above menu go to edit configurations     2- Add the bottom of the screen you will find before launch click on the plus and choose Run External Tool    2- Fill the following information  note that the working directory is your project root directory  not the android directory      3- Make sure this run before anything else  in the end  your configuration should look something like this

User · Answer

if error from butterknife auto generated file then update butterknife dependency version  implementation  com jakewharton butterknife 10 0 0  annotationProcessor  com jakewharton butterknife-compiler 10 0 0

User · Answer

Annotations come from the support s library which are packaged in android support annotation     As another option you can use  NonNull annotation which denotes that a parameter  field or method return value can never be null  It is imported from import android support annotation NonNull

User · Answer

I had similar issues when migrating to androidx  this issue comes due to the Old Butter Knife library dependency   if you are using butter knife then you should use at least butter knife version  9 0 0-SNAPSHOT or above   implementation  com jakewharton butterknife 9 0 0-SNAPSHOT   annotationProcessor  com jakewharton butterknife-compiler 9 0 0-SNAPSHOT

User · Answer

For Ionic  try this  ionic cordova plugin add cordova-plugin-androidx ionic cordova plugin add cordova-plugin-androidx-adapter  The error comes because this app is not using androidX but these plugins solve errors

User · Answer

I had similar issues when migrating to androidx   If by adding the below two lines to gradle properties did not solve the issue  android useAndroidX true android enableJetifier true   Then try    With Android Studio 3 2 and higher  you can migrate an existing project to AndroidX by selecting Refactor   Migrate to AndroidX  from the menu bar  developer android com    If you still run into issues with migration then manually try to replace the libraries which are causing the issue   For example   If you have an issue with android support annotation NonNull change it to androidx annotation NonNull as indicated in the below class mappings table   Class Mappings  Maven Artifact Mappings

User · Answer

All you need to do is to replace  import android support annotation Nullable  in class imports to  import androidx annotation Nullable    Thats a common practice  whenever any import giving issue   remove that import and simply press Alt Enter on the related class  that will give you option to  import class   hint Enter and things will get resolved

User · Answer

For me it was an old version of npm   Run npm install npm latest -g and then npm install

User · Answer

You can find here the official javadoc of the support-annotationslibrary      Error  3  31  error  package com android annotations does not exist   As you can see all the classes are in the same package android support annotation and not com android annotations      Error  7  2  error  cannot find symbol class NonNullByDefault   Also the class NonNullByDefault doesn t exist in that package

[android] error: package com.android.annotations does not exist

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