不需要引用 apt
apply plugin: 'com.android.application'

android {

defaultConfig {
…
jackOptions {
enabled true
}
}

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

dependencies {
// dagger2
compile 'com.google.dagger:dagger:2.7'
annotationProcessor 'com.google.dagger:dagger-compiler:2.7'
provided 'javax.annotation:jsr250-api:1.0'
}