In Android studio Flamingo and above version below code working for butterknife library. 1. add below code in build.gradle(:app) file tasks.withType(JavaCompile).configureEach { options.fork = true options.forkOptions.jvmArgs += [ '--add-opens=jdk.compiler/com.sun.tools.javac.tree=ALL-UNNAMED', '--add-opens=jdk.compiler/com.sun.tools.javac.code=ALL-UNNAMED', '--add-opens=jdk.compiler/com.sun.tools.javac.comp=ALL-UNNAMED', '--add-opens=jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED', '--add-opens=jdk.compiler/com.sun.tools.javac.main=ALL-UNNAMED', '--add-opens=jdk.compiler/com.sun.tools.javac.model=ALL-UNNAMED', '--add-opens=jdk.compiler/com.sun.tools.javac.parser=ALL-UNNAMED', '--add-opens=jdk.compiler/com.sun.tools.javac.processing=ALL-UNNAMED', '--add-opens=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED', '--add-opens=jdk.compiler/com.sun.tools.javac.jvm=ALL-UNNAMED', ] } 2. android { ... // Butterknife requires Java 8. compileOptions { sourceCompatibility JavaVersion.VERSION_1_8 targetCompatibility JavaVersion.VERSION_1_8 } } dependencies { implementation 'com.jakewharton:butterknife:10.2.3' annotationProcessor 'com.jakewharton:butterknife-compiler:10.2.3' } 3. To use Butter Knife in a library, add the plugin to your buildscript: buildscript { repositories { mavenCentral() google() } dependencies { classpath 'com.jakewharton:butterknife-gradle-plugin:10.2.3' } } 4. and then apply it in your module: apply plugin: 'com.android.library' apply plugin: 'com.jakewharton.butterknife' 5. Now make sure you use R2 instead of R inside all Butter Knife annotations. class ExampleActivity extends Activity { @BindView(R2.id.user) EditText username; @BindView(R2.id.pass) EditText password; ... }

In Android studio Flamingo and above version below code working for butterknife library. 1. add below code in build.gradle(:app) file tasks.withType(JavaCompile).configureEach { options.fork = true options.forkOptions.jvmArgs += [ '--add-opens=jdk.compiler/com.sun.tools.javac.tree=ALL-UNNAMED', '--add-opens=jdk.compiler/com.sun.tools.javac.code=ALL-UNNAMED', '--add-opens=jdk.compiler/com.sun.tools.javac.comp=ALL-UNNAMED', '--add-opens=jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED', '--add-opens=jdk.compiler/com.sun.tools.javac.main=ALL-UNNAMED', '--add-opens=jdk.compiler/com.sun.tools.javac.model=ALL-UNNAMED', '--add-opens=jdk.compiler/com.sun.tools.javac.parser=ALL-UNNAMED', '--add-opens=jdk.compiler/com.sun.tools.javac.processing=ALL-UNNAMED', '--add-opens=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED', '--add-opens=jdk.compiler/com.sun.tools.javac.jvm=ALL-UNNAMED', ] } 2. android { ... // Butterknife requires Java 8. compileOptions { sourceCompatibility JavaVersion.VERSION_1_8 targetCompatibility JavaVersion.VERSION_1_8 } } dependencies { implementation 'com.jakewharton:butterknife:10.2.3' annotationProcessor 'com.jakewharton:butterknife-compiler:10.2.3' } 3. To use Butter Knife in a library, add the plugin to your buildscript: buildscript { repositories { mavenCentral() google() } dependencies { classpath 'com.jakewharton:butterknife-gradle-plugin:10.2.3' } } 4. and then apply it in your module: apply plugin: 'com.android.library' apply plugin: 'com.jakewharton.butterknife' 5. Now make sure you use R2 instead of R inside all Butter Knife annotations. class ExampleActivity extends Activity { @BindView(R2.id.user) EditText username; @BindView(R2.id.pass) EditText password; ... }