AndroidX遇到ButterKnife

1. gradle.properties文件中添加如下代码：

android.enableJetifier=true
android.useAndroidX=true

2. build.gradle文件：

android{
  defaultConfig {
        applicationId "com.fudd.jetpackdemo"
        minSdkVersion 19
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"  //  this
    }
//其他...

 compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8  //  this
        targetCompatibility JavaVersion.VERSION_1_8  //  this
    }

}
dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    // ***** androidx 和 support 冲突
    implementation 'androidx.appcompat:appcompat:1.0.2'  //  this
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'  //  this
    testImplementation 'junit:junit:4.12'  //  this
    androidTestImplementation 'androidx.test:runner:1.1.1'  //  this
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'  //  this

    implementation "androidx.lifecycle:lifecycle-extensions:2.0.0"
    annotationProcessor "androidx.lifecycle:lifecycle-compiler:2.0.0"

    //butterknife
    //noinspection GradleDependency
    implementation 'com.jakewharton:butterknife:10.0.0'  //  this
    //noinspection GradleDependency
    annotationProcessor 'com.jakewharton:butterknife-compiler:10.0.0'  //  this
}