Can not resolve symbol DaggerApplicationComponent

Question

I use Dagger2 with java and I got "Can not resolve symbol DaggerApplicationComponent error in my application." Seems there is something wrong with dependencies. Any help would be really appreciated. My complete code is here- https://github.com/rohitku860/AndroidMvpDagger2

Here is my app graddle with dependencies:

 apply plugin: 'com.android.application'
    android {
    compileSdkVersion 26
    defaultConfig {
        applicationId "com.example.android.androidmvpdagger2"
        minSdkVersion 16
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
       }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

    dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso- 
    core:3.0.1'
    implementation 'com.google.dagger:dagger:2.13'
    annotationProcessor 'com.google.dagger:dagger-compiler:2.13'
    implementation 'com.jakewharton:butterknife:8.5.1'
    annotationProcessor 'com.jakewharton:butterknife-compiler:8.5.1'

}

and here is project one:

        buildscript {

        repositories {
            google()
            jcenter()
        }
        dependencies {
            classpath 'com.android.tools.build:gradle:3.1.0'
        }
    }

        allprojects {
        repositories {
            google()
            jcenter()
        }
    }



           task clean(type: Delete) {
            delete rootProject.buildDir
        }

Answer 1

This error is not related to your Gradle configuration.

DaggerApplicationComponent is a class that Dagger generates for ApplicationComponent interface that you defined. If there is any error during code generation (e.g. missing @Provides method), Dagger will not generate DaggerApplicationComponent and you'll get this error.

What you need to do is to read the entire error output in AndroidStudio and try to understand why Dagger failed.

I also encountered a very nasty behavior when some import statements were missing in project files. In these cases Dagger will fail, but will not tell you exactly what the problem is and you'll need to look for it by yourself.

If you need further help - attach the build error output to the question.

Answer 2

There is a simple solution for this, just rebuild the project and it might work