diff --git a/app/build.gradle b/app/build.gradle
index ee67f34..1193a31 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,7 +1,6 @@
 apply plugin: "com.android.application"
 apply plugin: "kotlin-android"
 apply plugin: "kotlin-android-extensions"
-apply from: "$rootProject.projectDir/spotless.gradle"
 
 android {
     compileSdkVersion androidCompileSdkVersion
diff --git a/app/src/main/java/com/qifan/powerpermission/MainActivity.kt b/app/src/main/java/com/qifan/powerpermission/MainActivity.kt
index 56eac4e..7cfb1f1 100644
--- a/app/src/main/java/com/qifan/powerpermission/MainActivity.kt
+++ b/app/src/main/java/com/qifan/powerpermission/MainActivity.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission
 
 import android.content.Intent
diff --git a/app/src/main/java/com/qifan/powerpermission/activity/ExampleActivity.kt b/app/src/main/java/com/qifan/powerpermission/activity/ExampleActivity.kt
index fa7e8ac..96a2021 100644
--- a/app/src/main/java/com/qifan/powerpermission/activity/ExampleActivity.kt
+++ b/app/src/main/java/com/qifan/powerpermission/activity/ExampleActivity.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.activity
 
 import android.Manifest
@@ -6,7 +21,12 @@ import androidx.appcompat.app.AppCompatActivity
 import com.qifan.powerpermission.Permission
 import com.qifan.powerpermission.PowerPermission
 import com.qifan.powerpermission.R
-import com.qifan.powerpermission.data.*
+import com.qifan.powerpermission.data.granted
+import com.qifan.powerpermission.data.hasAllGranted
+import com.qifan.powerpermission.data.hasPermanentDenied
+import com.qifan.powerpermission.data.hasRational
+import com.qifan.powerpermission.data.permanentDenied
+import com.qifan.powerpermission.data.rational
 import com.qifan.powerpermission.databinding.ActivityExampleBinding
 
 class ExampleActivity : AppCompatActivity() {
diff --git a/app/src/main/java/com/qifan/powerpermission/childfragment/ExampleChildContainerFragment.kt b/app/src/main/java/com/qifan/powerpermission/childfragment/ExampleChildContainerFragment.kt
index bb3f27b..b524fd8 100644
--- a/app/src/main/java/com/qifan/powerpermission/childfragment/ExampleChildContainerFragment.kt
+++ b/app/src/main/java/com/qifan/powerpermission/childfragment/ExampleChildContainerFragment.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.childfragment
 
 import android.os.Bundle
diff --git a/app/src/main/java/com/qifan/powerpermission/childfragment/ExampleChildFragment.kt b/app/src/main/java/com/qifan/powerpermission/childfragment/ExampleChildFragment.kt
index eff1855..b6b0b0e 100644
--- a/app/src/main/java/com/qifan/powerpermission/childfragment/ExampleChildFragment.kt
+++ b/app/src/main/java/com/qifan/powerpermission/childfragment/ExampleChildFragment.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.childfragment
 
 import android.Manifest
@@ -10,7 +25,12 @@ import androidx.fragment.app.Fragment
 import com.qifan.powerpermission.Permission
 import com.qifan.powerpermission.R
 import com.qifan.powerpermission.askPermissions
-import com.qifan.powerpermission.data.*
+import com.qifan.powerpermission.data.granted
+import com.qifan.powerpermission.data.hasAllGranted
+import com.qifan.powerpermission.data.hasPermanentDenied
+import com.qifan.powerpermission.data.hasRational
+import com.qifan.powerpermission.data.permanentDenied
+import com.qifan.powerpermission.data.rational
 import com.qifan.powerpermission.databinding.FragmentChildExampleBinding
 import com.qifan.powerpermission.rationale.createDialogRationale
 import com.qifan.powerpermission.rationale.delegate.RationaleDelegate
diff --git a/app/src/main/java/com/qifan/powerpermission/coroutines/CoroutinesActivity.kt b/app/src/main/java/com/qifan/powerpermission/coroutines/CoroutinesActivity.kt
index 7852e02..e60d6c1 100644
--- a/app/src/main/java/com/qifan/powerpermission/coroutines/CoroutinesActivity.kt
+++ b/app/src/main/java/com/qifan/powerpermission/coroutines/CoroutinesActivity.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.coroutines
 
 import android.Manifest
@@ -5,7 +20,13 @@ import android.os.Bundle
 import androidx.appcompat.app.AppCompatActivity
 import com.qifan.powerpermission.Permission
 import com.qifan.powerpermission.R
-import com.qifan.powerpermission.data.*
+import com.qifan.powerpermission.data.PermissionResult
+import com.qifan.powerpermission.data.granted
+import com.qifan.powerpermission.data.hasAllGranted
+import com.qifan.powerpermission.data.hasPermanentDenied
+import com.qifan.powerpermission.data.hasRational
+import com.qifan.powerpermission.data.permanentDenied
+import com.qifan.powerpermission.data.rational
 import com.qifan.powerpermission.databinding.ActivityCoroutinesExmapleBinding
 import com.qifan.powerpermission.rationale.createDialogRationale
 import com.qifan.powerpermission.rationale.delegate.RationaleDelegate
diff --git a/app/src/main/java/com/qifan/powerpermission/fragment/ExampleFragment.kt b/app/src/main/java/com/qifan/powerpermission/fragment/ExampleFragment.kt
index 19b4225..366da5b 100644
--- a/app/src/main/java/com/qifan/powerpermission/fragment/ExampleFragment.kt
+++ b/app/src/main/java/com/qifan/powerpermission/fragment/ExampleFragment.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.fragment
 
 import android.Manifest
@@ -10,7 +25,12 @@ import androidx.fragment.app.Fragment
 import com.qifan.powerpermission.Permission
 import com.qifan.powerpermission.R
 import com.qifan.powerpermission.askPermissions
-import com.qifan.powerpermission.data.*
+import com.qifan.powerpermission.data.granted
+import com.qifan.powerpermission.data.hasAllGranted
+import com.qifan.powerpermission.data.hasPermanentDenied
+import com.qifan.powerpermission.data.hasRational
+import com.qifan.powerpermission.data.permanentDenied
+import com.qifan.powerpermission.data.rational
 import com.qifan.powerpermission.databinding.FragmentExampleBinding
 import com.qifan.powerpermission.rationale.createDialogRationale
 import com.qifan.powerpermission.rationale.delegate.RationaleDelegate
diff --git a/app/src/main/java/com/qifan/powerpermission/livedata/LiveDataActivity.kt b/app/src/main/java/com/qifan/powerpermission/livedata/LiveDataActivity.kt
index c28cbcf..bef8d55 100644
--- a/app/src/main/java/com/qifan/powerpermission/livedata/LiveDataActivity.kt
+++ b/app/src/main/java/com/qifan/powerpermission/livedata/LiveDataActivity.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.livedata
 
 import android.Manifest
@@ -6,7 +21,13 @@ import androidx.appcompat.app.AppCompatActivity
 import androidx.lifecycle.Observer
 import com.qifan.powerpermission.Permission
 import com.qifan.powerpermission.R
-import com.qifan.powerpermission.data.*
+import com.qifan.powerpermission.data.PermissionResult
+import com.qifan.powerpermission.data.granted
+import com.qifan.powerpermission.data.hasAllGranted
+import com.qifan.powerpermission.data.hasPermanentDenied
+import com.qifan.powerpermission.data.hasRational
+import com.qifan.powerpermission.data.permanentDenied
+import com.qifan.powerpermission.data.rational
 import com.qifan.powerpermission.databinding.ActivityLiveDataBinding
 import com.qifan.powerpermission.rationale.createDialogRationale
 import com.qifan.powerpermission.rationale.delegate.RationaleDelegate
diff --git a/app/src/main/java/com/qifan/powerpermission/rx/RxJava2Activity.kt b/app/src/main/java/com/qifan/powerpermission/rx/RxJava2Activity.kt
index 0b67d80..cd39a0f 100644
--- a/app/src/main/java/com/qifan/powerpermission/rx/RxJava2Activity.kt
+++ b/app/src/main/java/com/qifan/powerpermission/rx/RxJava2Activity.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.rx
 
 import android.Manifest
@@ -7,7 +22,13 @@ import androidx.appcompat.app.AppCompatActivity
 import com.jakewharton.rxbinding3.view.clicks
 import com.qifan.powerpermission.Permission
 import com.qifan.powerpermission.R
-import com.qifan.powerpermission.data.*
+import com.qifan.powerpermission.data.PermissionResult
+import com.qifan.powerpermission.data.granted
+import com.qifan.powerpermission.data.hasAllGranted
+import com.qifan.powerpermission.data.hasPermanentDenied
+import com.qifan.powerpermission.data.hasRational
+import com.qifan.powerpermission.data.permanentDenied
+import com.qifan.powerpermission.data.rational
 import com.qifan.powerpermission.databinding.ActivityRx2ExmapleBinding
 import com.qifan.powerpermission.rationale.createDialogRationale
 import com.qifan.powerpermission.rationale.delegate.RationaleDelegate
diff --git a/app/src/main/java/com/qifan/powerpermission/rx/RxJava3Activity.kt b/app/src/main/java/com/qifan/powerpermission/rx/RxJava3Activity.kt
index 5d56603..c347137 100644
--- a/app/src/main/java/com/qifan/powerpermission/rx/RxJava3Activity.kt
+++ b/app/src/main/java/com/qifan/powerpermission/rx/RxJava3Activity.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.rx
 
 import android.Manifest
@@ -6,7 +21,13 @@ import android.util.Log
 import androidx.appcompat.app.AppCompatActivity
 import com.qifan.powerpermission.Permission
 import com.qifan.powerpermission.R
-import com.qifan.powerpermission.data.*
+import com.qifan.powerpermission.data.PermissionResult
+import com.qifan.powerpermission.data.granted
+import com.qifan.powerpermission.data.hasAllGranted
+import com.qifan.powerpermission.data.hasPermanentDenied
+import com.qifan.powerpermission.data.hasRational
+import com.qifan.powerpermission.data.permanentDenied
+import com.qifan.powerpermission.data.rational
 import com.qifan.powerpermission.databinding.ActivityRx3ExmapleBinding
 import com.qifan.powerpermission.rationale.createDialogRationale
 import com.qifan.powerpermission.rationale.delegate.RationaleDelegate
diff --git a/app/src/test/java/com/qifan/powerpermission/ExampleUnitTest.kt b/app/src/test/java/com/qifan/powerpermission/ExampleUnitTest.kt
index 064e65a..654623f 100644
--- a/app/src/test/java/com/qifan/powerpermission/ExampleUnitTest.kt
+++ b/app/src/test/java/com/qifan/powerpermission/ExampleUnitTest.kt
@@ -1,9 +1,23 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission
 
+import org.junit.Assert.assertEquals
 import org.junit.Test
 
-import org.junit.Assert.*
-
 /**
  * Example local unit test, which will execute on the development machine (host).
  *
diff --git a/build.gradle b/build.gradle
index 81c06b0..e755e9c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,7 +1,6 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
     apply from: "dependencies.gradle"
-    ext.ktlint_version = "0.33.0"
     repositories {
         google()
         jcenter()
@@ -9,16 +8,15 @@ buildscript {
     dependencies {
         classpath "com.android.tools.build:gradle:3.6.2"
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion"
-        classpath "com.diffplug.spotless:spotless-plugin-gradle:3.28.0"
+        classpath "com.diffplug.spotless:spotless-plugin-gradle:4.3.1"
         classpath "de.mannodermaus.gradle.plugins:android-junit5:1.5.2.0"
         classpath "com.novoda:bintray-release:0.9.2"
-        // NOTE: Do not place your application dependencies here; they belong
-        // in the individual module build.gradle files
+        classpath "com.jfrog.bintray.gradle:gradle-bintray-plugin:1.8.4"
+        classpath "org.jfrog.buildinfo:build-info-extractor-gradle:4.9.3"
     }
 }
-
-task clean(type: Delete) {
-    delete rootProject.buildDir
+apply {
+    from(rootProject.file("spotless/spotless.gradle"))
 }
 
 allprojects {
diff --git a/dependencies.gradle b/dependencies.gradle
index 07b9173..95bfcbc 100644
--- a/dependencies.gradle
+++ b/dependencies.gradle
@@ -1,7 +1,7 @@
 ext {
     // APP VERSION
     androidVersionCode = 1
-    androidVersionName = "1.0.0"
+    androidVersionName = "1.1.0"
 
     // ANDROID VERSION
     androidCompileSdkVersion = 29
@@ -9,7 +9,7 @@ ext {
     androidTargetSdkVersion = 29
 
     // KOTLIN
-    kotlinVersion = "1.3.71"
+    kotlinVersion = "1.3.72"
     kotlinStdlib = "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlinVersion"
     kotlinReflect = "org.jetbrains.kotlin:kotlin-reflect:$kotlinVersion"
 
@@ -49,7 +49,7 @@ ext {
     mockK = "io.mockk:mockk:$mockKVersion"
 
 
-    publishVersionID = "1.0.0"
+    publishVersionID = "1.1.0"
     groupProjectID = "com.qifan.powerpermission"
     userName = "undervoid"
     libName = "PowerPermission"
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index a723e8c..47ed9c1 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,4 +1,4 @@
-#Thu Mar 26 23:09:37 CET 2020
+#Sun Jun 28 14:33:41 CEST 2020
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
diff --git a/powerpermission-coroutines/build.gradle b/powerpermission-coroutines/build.gradle
index 85819e5..5b45145 100644
--- a/powerpermission-coroutines/build.gradle
+++ b/powerpermission-coroutines/build.gradle
@@ -1,6 +1,5 @@
 apply plugin: "com.android.library"
 apply plugin: "kotlin-android"
-apply from: "$rootProject.projectDir/spotless.gradle"
 apply plugin: "com.novoda.bintray-release"
 
 android {
diff --git a/powerpermission-coroutines/src/main/java/com/qifan/powerpermission/coroutines/CheckOnMainThread.kt b/powerpermission-coroutines/src/main/java/com/qifan/powerpermission/coroutines/CheckOnMainThread.kt
index ba222a8..b3e86a6 100644
--- a/powerpermission-coroutines/src/main/java/com/qifan/powerpermission/coroutines/CheckOnMainThread.kt
+++ b/powerpermission-coroutines/src/main/java/com/qifan/powerpermission/coroutines/CheckOnMainThread.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.coroutines
 
 import android.os.Looper
diff --git a/powerpermission-coroutines/src/main/java/com/qifan/powerpermission/coroutines/PowerPermissionCoroutines.kt b/powerpermission-coroutines/src/main/java/com/qifan/powerpermission/coroutines/PowerPermissionCoroutines.kt
index 0535fbe..ea6ed86 100644
--- a/powerpermission-coroutines/src/main/java/com/qifan/powerpermission/coroutines/PowerPermissionCoroutines.kt
+++ b/powerpermission-coroutines/src/main/java/com/qifan/powerpermission/coroutines/PowerPermissionCoroutines.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.coroutines
 
 import androidx.appcompat.app.AppCompatActivity
diff --git a/powerpermission-coroutines/src/test/java/com/qifan/powerpermission/coroutines/ExampleUnitTest.kt b/powerpermission-coroutines/src/test/java/com/qifan/powerpermission/coroutines/ExampleUnitTest.kt
index 5e9cd28..0c8fff9 100644
--- a/powerpermission-coroutines/src/test/java/com/qifan/powerpermission/coroutines/ExampleUnitTest.kt
+++ b/powerpermission-coroutines/src/test/java/com/qifan/powerpermission/coroutines/ExampleUnitTest.kt
@@ -1,9 +1,23 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.coroutines
 
+import org.junit.Assert.assertEquals
 import org.junit.Test
 
-import org.junit.Assert.*
-
 /**
  * Example local unit test, which will execute on the development machine (host).
  *
diff --git a/powerpermission-livedata/build.gradle b/powerpermission-livedata/build.gradle
index c2bcb0e..31eaba6 100644
--- a/powerpermission-livedata/build.gradle
+++ b/powerpermission-livedata/build.gradle
@@ -1,7 +1,6 @@
 apply plugin: "com.android.library"
 apply plugin: "kotlin-android"
 apply plugin: "kotlin-android-extensions"
-apply from: "$rootProject.projectDir/spotless.gradle"
 apply plugin: "com.novoda.bintray-release"
 
 
diff --git a/powerpermission-livedata/src/main/java/com/qifan/powerpermission/livedata/PowerPermissionLiveData.kt b/powerpermission-livedata/src/main/java/com/qifan/powerpermission/livedata/PowerPermissionLiveData.kt
index c258677..5ccdc6a 100644
--- a/powerpermission-livedata/src/main/java/com/qifan/powerpermission/livedata/PowerPermissionLiveData.kt
+++ b/powerpermission-livedata/src/main/java/com/qifan/powerpermission/livedata/PowerPermissionLiveData.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.livedata
 
 import androidx.appcompat.app.AppCompatActivity
diff --git a/powerpermission-rxjava2/build.gradle b/powerpermission-rxjava2/build.gradle
index 872b842..dc622cd 100644
--- a/powerpermission-rxjava2/build.gradle
+++ b/powerpermission-rxjava2/build.gradle
@@ -1,7 +1,6 @@
 apply plugin: "com.android.library"
 apply plugin: "kotlin-android"
 apply plugin: "kotlin-android-extensions"
-apply from: "$rootProject.projectDir/spotless.gradle"
 apply plugin: "com.novoda.bintray-release"
 
 android {
diff --git a/powerpermission-rxjava2/src/main/java/com/qifan/powerpermission/rx2/CheckOnMainThreadRx2.kt b/powerpermission-rxjava2/src/main/java/com/qifan/powerpermission/rx2/CheckOnMainThreadRx2.kt
index bdbcce1..de06f7b 100644
--- a/powerpermission-rxjava2/src/main/java/com/qifan/powerpermission/rx2/CheckOnMainThreadRx2.kt
+++ b/powerpermission-rxjava2/src/main/java/com/qifan/powerpermission/rx2/CheckOnMainThreadRx2.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.rx2
 
 import android.os.Looper
diff --git a/powerpermission-rxjava2/src/main/java/com/qifan/powerpermission/rx2/PowerPermissionRx2.kt b/powerpermission-rxjava2/src/main/java/com/qifan/powerpermission/rx2/PowerPermissionRx2.kt
index 667d48a..4f78f97 100644
--- a/powerpermission-rxjava2/src/main/java/com/qifan/powerpermission/rx2/PowerPermissionRx2.kt
+++ b/powerpermission-rxjava2/src/main/java/com/qifan/powerpermission/rx2/PowerPermissionRx2.kt
@@ -1,8 +1,26 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.rx2
 
 import androidx.appcompat.app.AppCompatActivity
 import androidx.fragment.app.Fragment
-import com.qifan.powerpermission.*
+import com.qifan.powerpermission.Permission
+import com.qifan.powerpermission.RequestCode
+import com.qifan.powerpermission.askPermissions
+import com.qifan.powerpermission.askPermissionsAllGranted
 import com.qifan.powerpermission.core.PERMISSION_REQUEST_CODE
 import com.qifan.powerpermission.data.Configuration
 import com.qifan.powerpermission.data.DefaultConfiguration
diff --git a/powerpermission-rxjava3/build.gradle b/powerpermission-rxjava3/build.gradle
index 034861c..fea80e8 100644
--- a/powerpermission-rxjava3/build.gradle
+++ b/powerpermission-rxjava3/build.gradle
@@ -1,7 +1,6 @@
 apply plugin: "com.android.library"
 apply plugin: "kotlin-android"
 apply plugin: "kotlin-android-extensions"
-apply from: "$rootProject.projectDir/spotless.gradle"
 apply plugin: "com.novoda.bintray-release"
 
 android {
diff --git a/powerpermission-rxjava3/src/main/java/com/qifan/powerpermission/rx3/CheckOnMainThreadRx3.kt b/powerpermission-rxjava3/src/main/java/com/qifan/powerpermission/rx3/CheckOnMainThreadRx3.kt
index af06261..cd92dde 100644
--- a/powerpermission-rxjava3/src/main/java/com/qifan/powerpermission/rx3/CheckOnMainThreadRx3.kt
+++ b/powerpermission-rxjava3/src/main/java/com/qifan/powerpermission/rx3/CheckOnMainThreadRx3.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.rx3
 
 import android.os.Looper
diff --git a/powerpermission-rxjava3/src/main/java/com/qifan/powerpermission/rx3/PowerPermissionRx3.kt b/powerpermission-rxjava3/src/main/java/com/qifan/powerpermission/rx3/PowerPermissionRx3.kt
index a06ecf5..73e9f77 100644
--- a/powerpermission-rxjava3/src/main/java/com/qifan/powerpermission/rx3/PowerPermissionRx3.kt
+++ b/powerpermission-rxjava3/src/main/java/com/qifan/powerpermission/rx3/PowerPermissionRx3.kt
@@ -1,8 +1,26 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.rx3
 
 import androidx.appcompat.app.AppCompatActivity
 import androidx.fragment.app.Fragment
-import com.qifan.powerpermission.*
+import com.qifan.powerpermission.Permission
+import com.qifan.powerpermission.RequestCode
+import com.qifan.powerpermission.askPermissions
+import com.qifan.powerpermission.askPermissionsAllGranted
 import com.qifan.powerpermission.core.PERMISSION_REQUEST_CODE
 import com.qifan.powerpermission.data.Configuration
 import com.qifan.powerpermission.data.DefaultConfiguration
diff --git a/powerpermission/build.gradle b/powerpermission/build.gradle
index 72d27fc..04a1285 100644
--- a/powerpermission/build.gradle
+++ b/powerpermission/build.gradle
@@ -2,7 +2,6 @@ apply plugin: "com.android.library"
 apply plugin: "kotlin-android"
 apply plugin: "kotlin-android-extensions"
 apply plugin: "de.mannodermaus.android-junit5"
-apply from: "$rootProject.projectDir/spotless.gradle"
 apply plugin: "com.novoda.bintray-release"
 
 android {
diff --git a/powerpermission/src/main/java/com/qifan/powerpermission/Activities.kt b/powerpermission/src/main/java/com/qifan/powerpermission/Activities.kt
index 3c86cee..e562ae8 100644
--- a/powerpermission/src/main/java/com/qifan/powerpermission/Activities.kt
+++ b/powerpermission/src/main/java/com/qifan/powerpermission/Activities.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission
 
 import androidx.appcompat.app.AppCompatActivity
diff --git a/powerpermission/src/main/java/com/qifan/powerpermission/Fragments.kt b/powerpermission/src/main/java/com/qifan/powerpermission/Fragments.kt
index eaf0437..321b150 100644
--- a/powerpermission/src/main/java/com/qifan/powerpermission/Fragments.kt
+++ b/powerpermission/src/main/java/com/qifan/powerpermission/Fragments.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission
 
 import androidx.fragment.app.Fragment
diff --git a/powerpermission/src/main/java/com/qifan/powerpermission/PowerPermission.kt b/powerpermission/src/main/java/com/qifan/powerpermission/PowerPermission.kt
index 78f1348..564349c 100644
--- a/powerpermission/src/main/java/com/qifan/powerpermission/PowerPermission.kt
+++ b/powerpermission/src/main/java/com/qifan/powerpermission/PowerPermission.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission
 
 import com.qifan.powerpermission.core.PowerPermissionManager
diff --git a/powerpermission/src/main/java/com/qifan/powerpermission/core/PermissionFragment.kt b/powerpermission/src/main/java/com/qifan/powerpermission/core/PermissionFragment.kt
index 2eef047..cf601b1 100644
--- a/powerpermission/src/main/java/com/qifan/powerpermission/core/PermissionFragment.kt
+++ b/powerpermission/src/main/java/com/qifan/powerpermission/core/PermissionFragment.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.core
 
 import android.content.Context
@@ -59,9 +74,9 @@ class PermissionFragment : Fragment() {
                 grantResults = grantResults
             )
             if (rationalHandler != null && rationalHandler.data.shouldInvokeRational(
-                    this,
-                    result
-                )
+                this,
+                result
+            )
             ) {
                 rationalHandler.showRationale(::requestPermissions, code)
             } else {
diff --git a/powerpermission/src/main/java/com/qifan/powerpermission/core/PermissionRequestParams.kt b/powerpermission/src/main/java/com/qifan/powerpermission/core/PermissionRequestParams.kt
index 01939ca..f14ebab 100644
--- a/powerpermission/src/main/java/com/qifan/powerpermission/core/PermissionRequestParams.kt
+++ b/powerpermission/src/main/java/com/qifan/powerpermission/core/PermissionRequestParams.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.core
 
 import com.qifan.powerpermission.Permission
diff --git a/powerpermission/src/main/java/com/qifan/powerpermission/core/PowerPermissionManager.kt b/powerpermission/src/main/java/com/qifan/powerpermission/core/PowerPermissionManager.kt
index f37828f..32f0c05 100644
--- a/powerpermission/src/main/java/com/qifan/powerpermission/core/PowerPermissionManager.kt
+++ b/powerpermission/src/main/java/com/qifan/powerpermission/core/PowerPermissionManager.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.core
 
 import androidx.annotation.VisibleForTesting
diff --git a/powerpermission/src/main/java/com/qifan/powerpermission/core/extension/FragmentExt.kt b/powerpermission/src/main/java/com/qifan/powerpermission/core/extension/FragmentExt.kt
index 06fcde4..d13583a 100644
--- a/powerpermission/src/main/java/com/qifan/powerpermission/core/extension/FragmentExt.kt
+++ b/powerpermission/src/main/java/com/qifan/powerpermission/core/extension/FragmentExt.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.core.extension
 
 import android.content.Context
diff --git a/powerpermission/src/main/java/com/qifan/powerpermission/core/extension/LoggingExt.kt b/powerpermission/src/main/java/com/qifan/powerpermission/core/extension/LoggingExt.kt
index 2401310..4ee2174 100644
--- a/powerpermission/src/main/java/com/qifan/powerpermission/core/extension/LoggingExt.kt
+++ b/powerpermission/src/main/java/com/qifan/powerpermission/core/extension/LoggingExt.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.core.extension
 
 import android.util.Log
diff --git a/powerpermission/src/main/java/com/qifan/powerpermission/core/extension/PermissionExt.kt b/powerpermission/src/main/java/com/qifan/powerpermission/core/extension/PermissionExt.kt
index 17e62ba..7cac1cd 100644
--- a/powerpermission/src/main/java/com/qifan/powerpermission/core/extension/PermissionExt.kt
+++ b/powerpermission/src/main/java/com/qifan/powerpermission/core/extension/PermissionExt.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.core.extension
 
 import android.content.Context
diff --git a/powerpermission/src/main/java/com/qifan/powerpermission/data/Configuration.kt b/powerpermission/src/main/java/com/qifan/powerpermission/data/Configuration.kt
index ebce16c..18dae38 100644
--- a/powerpermission/src/main/java/com/qifan/powerpermission/data/Configuration.kt
+++ b/powerpermission/src/main/java/com/qifan/powerpermission/data/Configuration.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.data
 
 /**
diff --git a/powerpermission/src/main/java/com/qifan/powerpermission/data/GrantResult.kt b/powerpermission/src/main/java/com/qifan/powerpermission/data/GrantResult.kt
index 2a7fce5..0364f40 100644
--- a/powerpermission/src/main/java/com/qifan/powerpermission/data/GrantResult.kt
+++ b/powerpermission/src/main/java/com/qifan/powerpermission/data/GrantResult.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.data
 
 import android.content.pm.PackageManager
diff --git a/powerpermission/src/main/java/com/qifan/powerpermission/data/PermissionResult.kt b/powerpermission/src/main/java/com/qifan/powerpermission/data/PermissionResult.kt
index 0343ff8..c73b25a 100644
--- a/powerpermission/src/main/java/com/qifan/powerpermission/data/PermissionResult.kt
+++ b/powerpermission/src/main/java/com/qifan/powerpermission/data/PermissionResult.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.data
 
 import androidx.annotation.CheckResult
@@ -45,8 +60,8 @@ data class PermissionData(
 
     override fun equals(other: Any?): Boolean {
         return other != null &&
-                other is PermissionData &&
-                this.data == other.data
+            other is PermissionData &&
+            this.data == other.data
     }
 }
 
diff --git a/powerpermission/src/main/java/com/qifan/powerpermission/data/RationaleData.kt b/powerpermission/src/main/java/com/qifan/powerpermission/data/RationaleData.kt
index 4b4ac93..4d026f9 100644
--- a/powerpermission/src/main/java/com/qifan/powerpermission/data/RationaleData.kt
+++ b/powerpermission/src/main/java/com/qifan/powerpermission/data/RationaleData.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.data
 
 import androidx.annotation.CheckResult
diff --git a/powerpermission/src/main/java/com/qifan/powerpermission/rationale/DialogRationale.kt b/powerpermission/src/main/java/com/qifan/powerpermission/rationale/DialogRationale.kt
index 4795db0..5f58eb9 100644
--- a/powerpermission/src/main/java/com/qifan/powerpermission/rationale/DialogRationale.kt
+++ b/powerpermission/src/main/java/com/qifan/powerpermission/rationale/DialogRationale.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.rationale
 
 import android.app.Activity
diff --git a/powerpermission/src/main/java/com/qifan/powerpermission/rationale/delegate/RationaleActionCallback.kt b/powerpermission/src/main/java/com/qifan/powerpermission/rationale/delegate/RationaleActionCallback.kt
index 8b5e607..8475254 100644
--- a/powerpermission/src/main/java/com/qifan/powerpermission/rationale/delegate/RationaleActionCallback.kt
+++ b/powerpermission/src/main/java/com/qifan/powerpermission/rationale/delegate/RationaleActionCallback.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.rationale.delegate
 
 import com.qifan.powerpermission.core.extension.warn
diff --git a/powerpermission/src/main/java/com/qifan/powerpermission/rationale/delegate/RationaleDelegate.kt b/powerpermission/src/main/java/com/qifan/powerpermission/rationale/delegate/RationaleDelegate.kt
index 79b963b..b04ce28 100644
--- a/powerpermission/src/main/java/com/qifan/powerpermission/rationale/delegate/RationaleDelegate.kt
+++ b/powerpermission/src/main/java/com/qifan/powerpermission/rationale/delegate/RationaleDelegate.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.rationale.delegate
 
 import com.qifan.powerpermission.Permission
diff --git a/powerpermission/src/main/java/com/qifan/powerpermission/rationale/delegate/dialog/DialogRationaleDelegate.kt b/powerpermission/src/main/java/com/qifan/powerpermission/rationale/delegate/dialog/DialogRationaleDelegate.kt
index 98e297c..76e7887 100644
--- a/powerpermission/src/main/java/com/qifan/powerpermission/rationale/delegate/dialog/DialogRationaleDelegate.kt
+++ b/powerpermission/src/main/java/com/qifan/powerpermission/rationale/delegate/dialog/DialogRationaleDelegate.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.rationale.delegate.dialog
 
 import android.app.AlertDialog
diff --git a/powerpermission/src/test/java/com/qifan/powerpermission/PowerPermissionManager.kt b/powerpermission/src/test/java/com/qifan/powerpermission/PowerPermissionManager.kt
index a6840a7..152440d 100644
--- a/powerpermission/src/test/java/com/qifan/powerpermission/PowerPermissionManager.kt
+++ b/powerpermission/src/test/java/com/qifan/powerpermission/PowerPermissionManager.kt
@@ -1 +1,16 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission
diff --git a/powerpermission/src/test/java/com/qifan/powerpermission/data/GrantResultTest.kt b/powerpermission/src/test/java/com/qifan/powerpermission/data/GrantResultTest.kt
index 9738b97..2c8fb67 100644
--- a/powerpermission/src/test/java/com/qifan/powerpermission/data/GrantResultTest.kt
+++ b/powerpermission/src/test/java/com/qifan/powerpermission/data/GrantResultTest.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.data
 
 import android.content.pm.PackageManager
diff --git a/powerpermission/src/test/java/com/qifan/powerpermission/data/PermissionResultTest.kt b/powerpermission/src/test/java/com/qifan/powerpermission/data/PermissionResultTest.kt
index 3b947ee..405e232 100644
--- a/powerpermission/src/test/java/com/qifan/powerpermission/data/PermissionResultTest.kt
+++ b/powerpermission/src/test/java/com/qifan/powerpermission/data/PermissionResultTest.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.data
 
 import android.Manifest
diff --git a/powerpermission/src/test/java/com/qifan/powerpermission/data/RationaleDataTest.kt b/powerpermission/src/test/java/com/qifan/powerpermission/data/RationaleDataTest.kt
index e7acfd4..21d7f0c 100644
--- a/powerpermission/src/test/java/com/qifan/powerpermission/data/RationaleDataTest.kt
+++ b/powerpermission/src/test/java/com/qifan/powerpermission/data/RationaleDataTest.kt
@@ -1,3 +1,18 @@
+/**
+ * Copyright (C) 2020 by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.qifan.powerpermission.data
 
 import org.assertj.core.api.Assertions.assertThat
diff --git a/spotless.gradle b/spotless.gradle
deleted file mode 100644
index caf7c3d..0000000
--- a/spotless.gradle
+++ /dev/null
@@ -1,17 +0,0 @@
-apply plugin: "com.diffplug.gradle.spotless"
-
-spotless {
-    java {
-        target "**/*.java"
-        trimTrailingWhitespace()
-        removeUnusedImports()
-        googleJavaFormat()
-        endWithNewline()
-    }
-    kotlin {
-        target "**/*.kt"
-        ktlint(rootProject.ktlint_version)
-        trimTrailingWhitespace()
-        endWithNewline()
-    }
-}
diff --git a/spotless/copyright.java b/spotless/copyright.java
new file mode 100644
index 0000000..626e5cb
--- /dev/null
+++ b/spotless/copyright.java
@@ -0,0 +1,13 @@
+/**
+ * Copyright (C) $YEAR by Qifan YANG (@underwindfall)
+ *
+ * <p>Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of the License at
+ *
+ * <p>http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * <p>Unless required by applicable law or agreed to in writing, software distributed under the
+ * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
\ No newline at end of file
diff --git a/spotless/copyright.kt b/spotless/copyright.kt
new file mode 100644
index 0000000..bf804ad
--- /dev/null
+++ b/spotless/copyright.kt
@@ -0,0 +1,15 @@
+/**
+ * Copyright (C) $YEAR by Qifan YANG (@underwindfall)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
\ No newline at end of file
diff --git a/spotless/spotless.gradle b/spotless/spotless.gradle
new file mode 100644
index 0000000..748eb07
--- /dev/null
+++ b/spotless/spotless.gradle
@@ -0,0 +1,22 @@
+apply plugin: "com.diffplug.gradle.spotless"
+
+spotless {
+    java {
+        target "**/src/**/*.java"
+        targetExclude '**/spotless/*.java'
+        trimTrailingWhitespace()
+        removeUnusedImports()
+        googleJavaFormat("1.8")
+        endWithNewline()
+        licenseHeaderFile rootProject.file('spotless/copyright.java')
+    }
+    kotlin {
+        target "**/src/**/*.kt"
+        targetExclude '**/spotless/*.kt'
+        targetExclude '**/buildSrc/src/main/java/*.kt'
+        ktlint("0.37.2")
+        trimTrailingWhitespace()
+        endWithNewline()
+        licenseHeaderFile rootProject.file('spotless/copyright.kt')
+    }
+}
\ No newline at end of file