fix bugs, add coroutines

lib_base/src/main/java/com/android/base/app/dagger/ViewModelFactory.java

@@ -11,6 +11,8 @@ import androidx.lifecycle.ViewModel;
 import androidx.lifecycle.ViewModelProvider;
 
 /**
+ * {@link androidx.lifecycle.AbstractSavedStateViewModelFactory} is not supported.
+ *
  * @author Ztiany
  * Email: ztiany3@gmail.com
  * Date : 2018-11-05 14:31

lib_base/src/main/java/com/android/base/app/dagger/ViewModelModule.java

@@ -5,7 +5,7 @@ import dagger.Binds;
 import dagger.Module;
 
 /**
- * 使用 ViewModelModule 情况下，所有的 ViewModule 都由 Activity 界别容器提供，因此 Fragment 级容器无法为其 ViewModule 提供依赖。这是仅有的局限性。
+ * {@link androidx.lifecycle.AbstractSavedStateViewModelFactory} is not supported.
  *
  * @author Ztiany
  * Email: ztiany3@gmail.com

lib_base/src/main/java/com/android/base/app/fragment/BaseDialogFragment.kt

@@ -204,15 +204,16 @@ open class BaseDialogFragment : AppCompatDialogFragment(), LoadingView, OnBackPr
         return false
     }
 
-    private fun loadingView(): LoadingView? {
+    private fun loadingView(): LoadingView {
         val loadingViewImpl = loadingView
-        if (loadingViewImpl == null) {
+        return if (loadingViewImpl != null) {
+            loadingViewImpl
+        } else {
             loadingView = onCreateLoadingView()
+                    ?: Sword.get().loadingViewFactory.createLoadingDelegate(requireContext())
+            loadingView
+                    ?: throw NullPointerException("you need to config LoadingViewFactory")
         }
-        if (loadingViewImpl == null) {
-            loadingView = Sword.get().loadingViewFactory.createLoadingDelegate(requireContext())
-        }
-        return loadingViewImpl
     }
 
     protected open fun onCreateLoadingView(): LoadingView? {
@@ -220,31 +221,31 @@ open class BaseDialogFragment : AppCompatDialogFragment(), LoadingView, OnBackPr
     }
 
     override fun showLoadingDialog() {
-        loadingView()?.showLoadingDialog(true)
+        loadingView().showLoadingDialog(true)
     }
 
     override fun showLoadingDialog(cancelable: Boolean) {
-        loadingView()?.showLoadingDialog(cancelable)
+        loadingView().showLoadingDialog(cancelable)
     }
 
     override fun showLoadingDialog(message: CharSequence, cancelable: Boolean) {
-        loadingView()?.showLoadingDialog(message, cancelable)
+        loadingView().showLoadingDialog(message, cancelable)
     }
 
     override fun showLoadingDialog(@StringRes messageId: Int, cancelable: Boolean) {
-        loadingView()?.showLoadingDialog(messageId, cancelable)
+        loadingView().showLoadingDialog(messageId, cancelable)
     }
 
     override fun dismissLoadingDialog() {
-        loadingView()?.dismissLoadingDialog()
+        loadingView().dismissLoadingDialog()
     }
 
     override fun showMessage(message: CharSequence) {
-        loadingView()?.showMessage(message)
+        loadingView().showMessage(message)
     }
 
     override fun showMessage(@StringRes messageId: Int) {
-        loadingView()?.showMessage(messageId)
+        loadingView().showMessage(messageId)
     }
 
 }

lib_base/src/main/java/com/android/base/app/fragment/BaseFragment.kt

@@ -215,15 +215,16 @@ open class BaseFragment : Fragment(), LoadingView, OnBackPressListener, Fragment
         return false
     }
 
-    private fun loadingView(): LoadingView? {
+    private fun loadingView(): LoadingView {
         val loadingViewImpl = loadingView
-        if (loadingViewImpl == null) {
+        return if (loadingViewImpl != null) {
+            loadingViewImpl
+        } else {
             loadingView = onCreateLoadingView()
+                    ?: Sword.get().loadingViewFactory.createLoadingDelegate(requireContext())
+            loadingView
+                    ?: throw NullPointerException("you need to config LoadingViewFactory")
         }
-        if (loadingViewImpl == null) {
-            loadingView = Sword.get().loadingViewFactory.createLoadingDelegate(requireContext())
-        }
-        return loadingViewImpl
     }
 
     protected open fun onCreateLoadingView(): LoadingView? {
@@ -231,31 +232,31 @@ open class BaseFragment : Fragment(), LoadingView, OnBackPressListener, Fragment
     }
 
     override fun showLoadingDialog() {
-        loadingView()?.showLoadingDialog(true)
+        loadingView().showLoadingDialog(true)
     }
 
     override fun showLoadingDialog(cancelable: Boolean) {
-        loadingView()?.showLoadingDialog(cancelable)
+        loadingView().showLoadingDialog(cancelable)
     }
 
     override fun showLoadingDialog(message: CharSequence, cancelable: Boolean) {
-        loadingView()?.showLoadingDialog(message, cancelable)
+        loadingView().showLoadingDialog(message, cancelable)
     }
 
     override fun showLoadingDialog(@StringRes messageId: Int, cancelable: Boolean) {
-        loadingView()?.showLoadingDialog(messageId, cancelable)
+        loadingView().showLoadingDialog(messageId, cancelable)
     }
 
     override fun dismissLoadingDialog() {
-        loadingView()?.dismissLoadingDialog()
+        loadingView().dismissLoadingDialog()
     }
 
     override fun showMessage(message: CharSequence) {
-        loadingView()?.showMessage(message)
+        loadingView().showMessage(message)
     }
 
     override fun showMessage(@StringRes messageId: Int) {
-        loadingView()?.showMessage(messageId)
+        loadingView().showMessage(messageId)
     }
 
     override fun onCreateAnimation(transit: Int, enter: Boolean, nextAnim: Int): Animation? {

lib_base/src/main/java/com/android/base/app/fragment/BaseStateDialogFragment.kt

@@ -44,7 +44,7 @@ abstract class BaseStateDialogFragment : BaseDialogFragment(), RefreshStateLayou
 
     protected open fun onRetry(@StateLayoutConfig.RetryableState state: Int) {
         refreshView.ifNonNull {
-            if (this.isRefreshing) {
+            if (!this.isRefreshing) {
                 autoRefresh()
             }
         } otherwise {

lib_base/src/main/java/com/android/base/app/fragment/BaseStateFragment.kt

@@ -51,7 +51,7 @@ abstract class BaseStateFragment : BaseFragment(), RefreshStateLayout {
 
     protected open fun onRetry(@RetryableState state: Int) {
         refreshView.ifNonNull {
-            if (this.isRefreshing) {
+            if (!this.isRefreshing) {
                 autoRefresh()
             }
         } otherwise {

lib_base/src/main/java/com/android/base/app/fragment/animator/FragmentAnimatorHelper.java

@@ -7,7 +7,6 @@ import android.view.animation.AnimationUtils;
 import com.android.base.R;
 
 import androidx.fragment.app.FragmentTransaction;
-import timber.log.Timber;
 
 public final class FragmentAnimatorHelper {
 
@@ -17,7 +16,6 @@ public final class FragmentAnimatorHelper {
     public FragmentAnimatorHelper(Context context, FragmentAnimator fragmentAnimator) {
         this.context = context;
         this.fragmentAnimator = fragmentAnimator;
-        Timber.d("context %s, animator %s", context.toString(), fragmentAnimator.toString());
     }
 
     public void changeAnimation(FragmentAnimator fragmentAnimator) {

lib_base/src/main/java/com/android/base/app/fragment/injectable/InjectableExtension.kt

@@ -50,19 +50,23 @@ fun <H, T> H.handleLiveResourceWithData(
         force: Boolean = true,
         onSuccess: (T) -> Unit
 ) where H : InjectableExtension, H : LoadingView, H : LifecycleOwner {
-
     liveData.observe(this, Observer {
         when {
             it.isError -> {
+                Timber.d("handleLiveResourceWithData -> isError")
                 dismissLoadingDialog()
                 errorHandler.handleError(it.error())
             }
             it.isLoading -> {
+                Timber.d("handleLiveResourceWithData -> isLoading")
                 showLoadingDialog(!force)
             }
-            it.isSuccess && it.hasData() -> {
+            it.isSuccess -> {
+                Timber.d("handleLiveResourceWithData -> isSuccess")
                 dismissLoadingDialog()
-                onSuccess(it.data())
+                if (it.hasData()) {
+                    onSuccess(it.data())
+                }
             }
         }
     })

lib_base/src/main/java/com/android/base/app/ui/UIEx.kt

@@ -6,7 +6,7 @@ import com.android.base.app.Sword
 import com.android.base.utils.common.isEmpty
 import timber.log.Timber
 
-fun <T> RefreshListLayout<T>.processListResultWithStatus(list: List<T>?, onEmpty: (() -> Unit)? = null) {
+fun <T> RefreshListLayout<T>.handleListResultWithStatus(list: List<T>?, onEmpty: (() -> Unit)? = null) {
     if (isLoadingMore) {
         if (!isEmpty(list)) {
             addData(list)
@@ -31,7 +31,7 @@ fun <T> RefreshListLayout<T>.processListResultWithStatus(list: List<T>?, onEmpty
     }
 }
 
-fun <T> RefreshListLayout<T>.processListResultWithoutStatus(list: List<T>?, onEmpty: (() -> Unit)? = null) {
+fun <T> RefreshListLayout<T>.handleListResultWithoutStatus(list: List<T>?, onEmpty: (() -> Unit)? = null) {
     if (isLoadingMore) {
         if (!isEmpty(list)) {
             addData(list)
@@ -83,7 +83,7 @@ fun <T> RefreshListLayout<T>.submitListResultWithoutStatus(list: List<T>?, hasMo
     }
 }
 
-fun RefreshListLayout<*>.processListErrorWithStatus(throwable: Throwable) {
+fun RefreshListLayout<*>.handleListErrorWithStatus(throwable: Throwable) {
     if (isRefreshing) {
         refreshCompleted()
     }
@@ -106,7 +106,7 @@ fun RefreshListLayout<*>.processListErrorWithStatus(throwable: Throwable) {
     }
 }
 
-fun RefreshListLayout<*>.processListErrorWithoutStatus() {
+fun RefreshListLayout<*>.handleListErrorWithoutStatus() {
     if (isRefreshing) {
         refreshCompleted()
     }
@@ -125,7 +125,7 @@ fun RefreshListLayout<*>.showLoadingIfEmpty() {
     }
 }
 
-fun <T> RefreshStateLayout.processResultWithStatus(t: T?, onResult: ((T) -> Unit)) {
+fun <T> RefreshStateLayout.handleResultWithStatus(t: T?, onResult: ((T) -> Unit)) {
     if (isRefreshing) {
         refreshCompleted()
     }
@@ -137,7 +137,7 @@ fun <T> RefreshStateLayout.processResultWithStatus(t: T?, onResult: ((T) -> Unit
     }
 }
 
-fun RefreshStateLayout.processErrorWithStatus(throwable: Throwable?) {
+fun RefreshStateLayout.handleErrorWithStatus(throwable: Throwable?) {
     if (throwable == null) {
         Timber.d("processErrorWithStatus called, but throwable is null")
         return

lib_base/src/main/java/com/android/base/utils/common/Times.kt

@@ -0,0 +1,11 @@
+package com.android.base.utils.common
+
+import java.text.SimpleDateFormat
+import java.util.*
+
+fun formatMilliseconds(milliseconds: Long, pattern: String = "yyyy-MM-dd"): String {
+    val sdp = SimpleDateFormat(pattern, Locale.getDefault())
+    val date = Date()
+    date.time = milliseconds
+    return sdp.format(date)
+}

lib_base/src/main/java/com/android/base/widget/MultiStateView.java

@@ -11,12 +11,12 @@ import android.view.ViewGroup;
 import android.widget.FrameLayout;
 
 import com.android.base.R;
-import com.android.base.app.ui.StateLayoutConfig;
 import com.android.base.app.ui.StateLayoutConfig.ViewState;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
+import static com.android.base.app.ui.StateLayoutConfig.BLANK;
 import static com.android.base.app.ui.StateLayoutConfig.CONTENT;
 import static com.android.base.app.ui.StateLayoutConfig.EMPTY;
 import static com.android.base.app.ui.StateLayoutConfig.ERROR;
@@ -83,13 +83,14 @@ public class MultiStateView extends FrameLayout {
 
     private void ensureInitState(int viewState) {
         /*
-             <enum name="content" value="1"/>
+            <enum name="content" value="1"/>
             <enum name="loading" value="2"/>
             <enum name="empty" value="3"/>
             <enum name="error" value="4"/>
             <enum name="net_error" value="5"/>
             <enum name="server_error" value="6"/>
             <enum name="requesting" value="7"/>
+            <enum name="blank" value="8"/>
         */
         switch (viewState) {
             case 2:
@@ -110,6 +111,9 @@ public class MultiStateView extends FrameLayout {
             case 7:
                 mViewState = REQUESTING;
                 break;
+            case 8:
+                mViewState = BLANK;
+                break;
             case 1:
             default:
                 mViewState = CONTENT;
@@ -194,7 +198,7 @@ public class MultiStateView extends FrameLayout {
     @Nullable
     @SuppressWarnings("unused")
     public View getView(@ViewState int state) {
-        if (state == StateLayoutConfig.BLANK) {
+        if (state == BLANK) {
             return null;
         }
         return ensureStateView(state);
@@ -259,7 +263,7 @@ public class MultiStateView extends FrameLayout {
      * Shows the {@link View} based on the {@link ViewState}
      */
     private void setView() {
-        if (mViewState == StateLayoutConfig.BLANK) {
+        if (mViewState == BLANK) {
             int size = mChildren.size();
             View view;
             for (int i = 0; i < size; i++) {

lib_base/src/main/res/values/base_attrs.xml

@@ -41,6 +41,7 @@
             <enum name="net_error" value="5"/>
             <enum name="server_error" value="6"/>
             <enum name="requesting" value="7"/>
+            <enum name="blank" value="8"/>
         </attr>
     </declare-styleable>
 

lib_coroutines/.gitignore

@@ -0,0 +1,22 @@
+*.iml
+.gradle
+/local.properties
+/.idea
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+*.iml
+.idea/
+.gradle
+/local.properties
+.DS_Store
+/build
+/captures
+*.apk
+*.ap_
+*.dex
+*.class
+bin/
+gen/
+local.properties

lib_coroutines/README.md

@@ -0,0 +1,3 @@
+# Explanation
+
+modifying from [kotlin-coroutines-android](https://github.com/enbandari/kotlin-coroutines-android) to support AndroidX.

lib_coroutines/build.gradle

@@ -0,0 +1,41 @@
+apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android'
+
+android {
+    compileSdkVersion rootProject.compileSdkVersion
+    buildToolsVersion rootProject.buildToolsVersion
+
+    defaultConfig {
+		minSdkVersion rootProject.minSdkVersion
+        targetSdkVersion rootProject.targetSdkVersion
+        versionCode 1
+        versionName "1.0"
+    }
+
+	kotlinOptions {
+        jvmTarget = "1.8"
+    }
+	
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+
+	//Kotlin
+    api kotlinLibraries.kotlinStdlib
+    api kotlinLibraries.kotlinReflect
+    api kotlinLibraries.kotlinCoroutines
+    api kotlinLibraries.kotlinAndroidCoroutines
+	
+	//AndroidX
+    compileOnly androidLibraries.appcompat
+    compileOnly androidLibraries.recyclerView
+    compileOnly androidLibraries.material
+}

lib_coroutines/proguard-rules.pro

@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

lib_coroutines/src/main/AndroidManifest.xml

@@ -0,0 +1,2 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="com.bennyhuo.kotlin.coroutines.android.mainscope"/>

lib_coroutines/src/main/java/com/bennyhuo/kotlin/coroutines/android/autodisposable/AutoDisposableJob.kt

@@ -0,0 +1,38 @@
+package com.bennyhuo.kotlin.coroutines.android.autodisposable
+
+import android.os.Build
+import android.view.View
+import android.view.View.OnAttachStateChangeListener
+import kotlinx.coroutines.*
+
+class AutoDisposableJob(
+        private val view: View,
+        private val wrapped: Job
+) : Job by wrapped, OnAttachStateChangeListener {
+
+    override fun onViewAttachedToWindow(v: View?) = Unit
+
+    override fun onViewDetachedFromWindow(v: View?) {
+        cancel()
+        view.removeOnAttachStateChangeListener(this)
+    }
+
+    private fun isViewAttached() =
+            Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT && view.isAttachedToWindow || view.windowToken != null
+
+    init {
+        if (isViewAttached()) {
+            view.addOnAttachStateChangeListener(this)
+        } else {
+            cancel()
+        }
+
+        invokeOnCompletion {
+            view.post {
+                view.removeOnAttachStateChangeListener(this)
+            }
+        }
+    }
+}
+
+fun Job.asAutoDisposable(view: View) = AutoDisposableJob(view, this)

lib_coroutines/src/main/java/com/bennyhuo/kotlin/coroutines/android/autodisposable/AutoDisposableJobView.kt

@@ -0,0 +1,16 @@
+package com.bennyhuo.kotlin.coroutines.android.autodisposable
+
+import android.view.View
+import kotlinx.coroutines.*
+import kotlin.coroutines.CoroutineContext
+
+fun View.onClickAutoDisposable(
+        context: CoroutineContext = Dispatchers.Main,
+        handler: suspend CoroutineScope.(v: View?) -> Unit
+) {
+    setOnClickListener { v ->
+        GlobalScope.launch(context, CoroutineStart.DEFAULT) {
+            handler(v)
+        }.asAutoDisposable(v)
+    }
+}

lib_coroutines/src/main/java/com/bennyhuo/kotlin/coroutines/android/mainscope/MainScope.kt

@@ -0,0 +1,50 @@
+package com.bennyhuo.kotlin.coroutines.android.mainscope
+
+import android.app.Application
+import com.bennyhuo.kotlin.coroutines.android.mainscope.internal.ActivityLifecycleCallbackImpl
+import com.bennyhuo.kotlin.coroutines.android.mainscope.job.EmptyInterceptor
+import com.bennyhuo.kotlin.coroutines.android.mainscope.job.EmptyJob
+import com.bennyhuo.kotlin.coroutines.android.mainscope.job.ImmutableCoroutineContext
+import com.bennyhuo.kotlin.coroutines.android.mainscope.utils.Logcat
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+import kotlin.coroutines.CoroutineContext
+
+interface MainScope : CoroutineScope {
+
+    companion object {
+        internal var isSetUp = false
+        internal var isDebug = false
+
+        val isFragmentSupported by lazy {
+            try {
+                Class.forName("androidx.fragment.app.FragmentManager\$FragmentLifecycleCallbacks")
+                Logcat.debug("Fragment enabled.")
+                true
+            } catch (e: ClassNotFoundException) {
+                Logcat.debug("Fragment disabled.")
+                Logcat.error(e)
+                false
+            }
+        }
+
+        fun setUp(application: Application): Companion {
+            application.registerActivityLifecycleCallbacks(ActivityLifecycleCallbackImpl)
+            isSetUp = true
+            return this
+        }
+
+        fun enableDebug() {
+            isDebug = true
+        }
+    }
+}
+
+internal class MainScopeImpl : MainScope {
+    override val coroutineContext = SupervisorJob() + Dispatchers.Main
+}
+
+internal object EmptyScope : MainScope {
+    override val coroutineContext: CoroutineContext = ImmutableCoroutineContext(EmptyJob() + EmptyInterceptor)
+}

lib_coroutines/src/main/java/com/bennyhuo/kotlin/coroutines/android/mainscope/exception/Exceptions.kt

@@ -0,0 +1,5 @@
+package com.bennyhuo.kotlin.coroutines.android.mainscope.exception
+
+class UnsupportedTypeException(type: Class<*>, vararg supportedTypes: String) : Exception("Unsupported type: $type. ${supportedTypes.joinToString()} ${if (supportedTypes.size == 1) "is" else "are"} needed.")
+
+class UnsupportedVersionException(library: String, version: String) : Exception("Unsupported version: $version of $library")

lib_coroutines/src/main/java/com/bennyhuo/kotlin/coroutines/android/mainscope/internal/ActivityLifecycleCallbackImpl.kt

@@ -0,0 +1,46 @@
+package com.bennyhuo.kotlin.coroutines.android.mainscope.internal
+
+import android.app.Activity
+import android.app.Application
+import android.os.Bundle
+import androidx.fragment.app.FragmentActivity
+import com.bennyhuo.kotlin.coroutines.android.mainscope.MainScope
+import com.bennyhuo.kotlin.coroutines.android.mainscope.scope.MainScoped
+import com.bennyhuo.kotlin.coroutines.android.mainscope.scope.onMainScopeCreate
+import com.bennyhuo.kotlin.coroutines.android.mainscope.scope.onMainScopeDestroy
+import com.bennyhuo.kotlin.coroutines.android.mainscope.utils.Logcat
+
+internal object ActivityLifecycleCallbackImpl : Application.ActivityLifecycleCallbacks {
+
+    override fun onActivityPaused(activity: Activity) {}
+
+    override fun onActivityResumed(activity: Activity) {}
+
+    override fun onActivityStarted(activity: Activity) {}
+
+    override fun onActivitySaveInstanceState(activity: Activity, outState: Bundle?) {}
+
+    override fun onActivityStopped(activity: Activity) {}
+
+    override fun onActivityCreated(activity: Activity, savedInstanceState: Bundle?) {
+        (activity as? MainScoped)?.onMainScopeCreate()
+        if (MainScope.isFragmentSupported) {
+            (activity as? FragmentActivity)?.supportFragmentManager?.registerFragmentLifecycleCallbacks(FragmentLifecycleCallbackImpl, true)
+        }
+    }
+
+    override fun onActivityDestroyed(activity: Activity) {
+        (activity as? MainScoped)?.onMainScopeDestroy()
+        if (MainScope.isFragmentSupported) {
+            Logcat.debug("onActivityDestroyed")
+            (activity as? FragmentActivity)?.supportFragmentManager?.let { fragmentManager ->
+                fragmentManager.unregisterFragmentLifecycleCallbacks(FragmentLifecycleCallbackImpl)
+                //Fragments may not be destroyed, so cancel scope right now.
+                fragmentManager.fragments.forEach { fragment ->
+                    (fragment as? MainScoped)?.onMainScopeDestroy()
+                }
+            }
+        }
+    }
+
+}

lib_coroutines/src/main/java/com/bennyhuo/kotlin/coroutines/android/mainscope/internal/FragmentLifecycleCallbackImpl.kt

@@ -0,0 +1,24 @@
+package com.bennyhuo.kotlin.coroutines.android.mainscope.internal
+
+import android.os.Bundle
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.FragmentManager
+import com.bennyhuo.kotlin.coroutines.android.mainscope.scope.MainScoped
+import com.bennyhuo.kotlin.coroutines.android.mainscope.scope.onMainScopeCreate
+import com.bennyhuo.kotlin.coroutines.android.mainscope.scope.onMainScopeDestroy
+import com.bennyhuo.kotlin.coroutines.android.mainscope.utils.Logcat
+
+internal object FragmentLifecycleCallbackImpl: FragmentManager.FragmentLifecycleCallbacks() {
+
+    override fun onFragmentCreated(fm: FragmentManager, f: Fragment, savedInstanceState: Bundle?) {
+        super.onFragmentCreated(fm, f, savedInstanceState)
+        (f as? MainScoped)?.onMainScopeCreate()
+    }
+
+    override fun onFragmentViewDestroyed(fm: FragmentManager, f: Fragment) {
+        super.onFragmentViewDestroyed(fm, f)
+        Logcat.debug("onFragmentViewDestroyed")
+        (f as? MainScoped)?.onMainScopeDestroy()
+    }
+
+}

lib_coroutines/src/main/java/com/bennyhuo/kotlin/coroutines/android/mainscope/job/Builders.kt

@@ -0,0 +1,21 @@
+package com.bennyhuo.kotlin.coroutines.android.mainscope.job
+
+import com.bennyhuo.kotlin.coroutines.android.mainscope.MainScope
+import kotlinx.coroutines.CoroutineStart
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.newCoroutineContext
+import kotlin.coroutines.CoroutineContext
+import kotlin.coroutines.EmptyCoroutineContext
+import kotlinx.coroutines.launch as launchInternal
+
+
+internal fun MainScope.launch(
+        context: CoroutineContext = EmptyCoroutineContext,
+        start: CoroutineStart = CoroutineStart.DEFAULT,
+        block: suspend MainScope.() -> Unit
+): Job {
+    val newContext = newCoroutineContext(context)
+    val coroutine = StandaloneCoroutineCompat(newContext, true)
+    coroutine.start(start, coroutine, block)
+    return coroutine
+}

lib_coroutines/src/main/java/com/bennyhuo/kotlin/coroutines/android/mainscope/job/EmptyDisposableHandle.kt

@@ -0,0 +1,7 @@
+package com.bennyhuo.kotlin.coroutines.android.mainscope.job
+
+import kotlinx.coroutines.DisposableHandle
+
+object EmptyDisposableHandle: DisposableHandle {
+    override fun dispose() = Unit
+}

lib_coroutines/src/main/java/com/bennyhuo/kotlin/coroutines/android/mainscope/job/EmptyInterceptor.kt

@@ -0,0 +1,20 @@
+package com.bennyhuo.kotlin.coroutines.android.mainscope.job
+
+import com.bennyhuo.kotlin.coroutines.android.mainscope.utils.Logcat
+import kotlin.coroutines.*
+
+internal object EmptyInterceptor: ContinuationInterceptor, AbstractCoroutineContextElement(ContinuationInterceptor) {
+
+    override fun <T> interceptContinuation(continuation: Continuation<T>): Continuation<T> {
+        return EmptyContinuation as Continuation<T>
+    }
+
+    private object EmptyContinuation: Continuation<Any>{
+        override val context: CoroutineContext = EmptyCoroutineContext
+
+        override fun resumeWith(result: Result<Any>) {
+            Logcat.warn("Intercepted coroutine. won't resume.")
+        }
+    }
+
+}

lib_coroutines/src/main/java/com/bennyhuo/kotlin/coroutines/android/mainscope/job/EmptyJob.kt

@@ -0,0 +1,63 @@
+package com.bennyhuo.kotlin.coroutines.android.mainscope.job
+
+import kotlinx.coroutines.CancellationException
+import kotlinx.coroutines.CompletionHandler
+import kotlinx.coroutines.InternalCoroutinesApi
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.selects.SelectClause0
+import kotlinx.coroutines.selects.SelectInstance
+import kotlin.coroutines.CoroutineContext
+import kotlin.coroutines.CoroutineContext.Element
+import kotlin.coroutines.CoroutineContext.Key
+import kotlin.coroutines.EmptyCoroutineContext
+
+internal class EmptyJob : JobCompat(), SelectClause0 {
+
+    private val cancellationException = CancellationException("EmptyScope")
+
+    override val children: Sequence<Job> = emptySequence()
+
+    override val isActive: Boolean = false
+
+    override val isCancelled: Boolean = true
+
+    override val isCompleted: Boolean = true
+
+    override val key: Key<*> = Job
+
+    override val onJoin: SelectClause0 = this
+
+    @InternalCoroutinesApi
+    override fun <R> registerSelectClause0(select: SelectInstance<R>, block: suspend () -> R) = Unit
+
+    override fun cancel(cause: Throwable?) = false
+
+    override fun cancel(cause: CancellationException?) = Unit
+
+    @InternalCoroutinesApi
+    override fun getCancellationException() = cancellationException
+
+    @InternalCoroutinesApi
+    override fun invokeOnCompletion(onCancelling: Boolean, invokeImmediately: Boolean, handler: CompletionHandler) = EmptyDisposableHandle.also { handler.invoke(cancellationException) }
+
+    override fun invokeOnCompletion(handler: CompletionHandler) = EmptyDisposableHandle.also { handler.invoke(cancellationException) }
+
+    override suspend fun join() = Unit
+
+    override fun start() = false
+
+    override fun plus(other: Job): Job = this
+
+    override fun cancel() = Unit
+
+    //region solutions for AbstractMethodError.
+    override operator fun <E : Element> get(key: Key<E>): E? =
+            if (this.key == key) this as E else null
+
+    override fun <R> fold(initial: R, operation: (R, Element) -> R): R = operation(initial, this)
+
+    override fun minusKey(key: Key<*>): CoroutineContext =
+            if (this.key == key) EmptyCoroutineContext else this
+    //endregion
+
+}

lib_coroutines/src/main/java/com/bennyhuo/kotlin/coroutines/android/mainscope/job/ImmutableCoroutineContext.kt

@@ -0,0 +1,15 @@
+package com.bennyhuo.kotlin.coroutines.android.mainscope.job
+
+import kotlin.coroutines.CoroutineContext
+import kotlin.coroutines.CoroutineContext.Element
+import kotlin.coroutines.CoroutineContext.Key
+
+class ImmutableCoroutineContext(private val coroutineContext: CoroutineContext): CoroutineContext {
+    override fun <R> fold(initial: R, operation: (R, Element) -> R): R = coroutineContext.fold(initial, operation)
+
+    override fun <E : Element> get(key: Key<E>) = coroutineContext[key]
+
+    override fun minusKey(key: Key<*>) = this
+
+    override fun plus(context: CoroutineContext) = this
+}

lib_coroutines/src/main/java/com/bennyhuo/kotlin/coroutines/android/mainscope/job/JobCompat.java

@@ -0,0 +1,37 @@
+package com.bennyhuo.kotlin.coroutines.android.mainscope.job;
+
+import org.jetbrains.annotations.NotNull;
+
+import kotlin.coroutines.CoroutineContext;
+import kotlinx.coroutines.ChildHandle;
+import kotlinx.coroutines.ChildJob;
+import kotlinx.coroutines.Job;
+
+abstract class JobCompat implements Job {
+     @NotNull
+    @Override
+     public final ChildHandle attachChild(@NotNull ChildJob childJob) {
+         //Parent is already cancelled. So cancel child directly.
+         childJob.cancel(getCancellationException());
+         return EmptyChildHandle.instance;
+    }
+
+    private static class EmptyChildHandle implements ChildHandle {
+        private static final EmptyChildHandle instance = new EmptyChildHandle();
+
+        @Override
+        public boolean childCancelled(@NotNull Throwable throwable) {
+            return true;
+        }
+
+        @Override
+        public void dispose() { }
+    }
+
+    //solutions for AbstractMethodError.
+    @NotNull
+    @Override
+    public final CoroutineContext plus(@NotNull CoroutineContext coroutineContext) {
+        return CoroutineContext.DefaultImpls.plus(this, coroutineContext);
+    }
+}

lib_coroutines/src/main/java/com/bennyhuo/kotlin/coroutines/android/mainscope/job/StandaloneCoroutineCompat.java

@@ -0,0 +1,22 @@
+package com.bennyhuo.kotlin.coroutines.android.mainscope.job;
+
+import com.bennyhuo.kotlin.coroutines.android.mainscope.MainScope;
+
+import org.jetbrains.annotations.NotNull;
+
+import kotlin.Unit;
+import kotlin.coroutines.CoroutineContext;
+import kotlinx.coroutines.AbstractCoroutine;
+import kotlinx.coroutines.CoroutineExceptionHandlerKt;
+
+class StandaloneCoroutineCompat extends AbstractCoroutine<Unit> implements MainScope {
+    public StandaloneCoroutineCompat(@NotNull CoroutineContext parentContext, boolean active) {
+        super(parentContext, active);
+    }
+
+    @Override
+    protected boolean handleJobException(@NotNull Throwable exception) {
+        CoroutineExceptionHandlerKt.handleCoroutineException(getContext(), exception);
+        return true;
+    }
+}

lib_coroutines/src/main/java/com/bennyhuo/kotlin/coroutines/android/mainscope/scope/AppCompatScoped.kt

@@ -0,0 +1,195 @@
+package com.bennyhuo.kotlin.coroutines.android.mainscope.scope
+
+import androidx.appcompat.widget.*
+import com.bennyhuo.kotlin.coroutines.android.mainscope.MainScope
+import com.bennyhuo.kotlin.coroutines.android.mainscope.job.launch
+
+interface AppCompatScoped : BasicScoped {
+
+    fun ActionMenuView.onMenuItemClick(
+            returnValue: Boolean = false,
+            handler: suspend MainScope.(item: android.view.MenuItem?) -> Unit
+    ) {
+        setOnMenuItemClickListener { item ->
+            mainScope.launch {
+                handler(item)
+            }
+            returnValue
+        }
+    }
+
+    fun ActivityChooserView.onDismiss(
+            handler: suspend MainScope.() -> Unit
+    ) {
+        setOnDismissListener { ->
+            mainScope.launch(block = handler)
+        }
+    }
+
+    fun FitWindowsFrameLayout.onFitSystemWindows(
+            handler: suspend MainScope.(insets: android.graphics.Rect?) -> Unit
+    ) {
+        setOnFitSystemWindowsListener { insets ->
+            mainScope.launch {
+                handler(insets)
+            }
+        }
+    }
+
+    fun SearchView.onClose(
+            returnValue: Boolean = false,
+            handler: suspend MainScope.() -> Unit
+    ) {
+        setOnCloseListener { ->
+            mainScope.launch(block = handler)
+            returnValue
+        }
+    }
+
+    fun SearchView.onQueryTextFocusChange(
+            handler: suspend MainScope.(v: android.view.View, hasFocus: Boolean) -> Unit
+    ) {
+        setOnQueryTextFocusChangeListener { v, hasFocus ->
+            mainScope.launch {
+                handler(v, hasFocus)
+            }
+        }
+    }
+
+    fun SearchView.onQueryTextListener(
+            init: __SearchView_OnQueryTextListener.() -> Unit
+    ) {
+        val listener = __SearchView_OnQueryTextListener(mainScope)
+        listener.init()
+        setOnQueryTextListener(listener)
+    }
+
+    class __SearchView_OnQueryTextListener(private val mainScope: MainScope) : SearchView.OnQueryTextListener {
+
+        private var _onQueryTextSubmit: (suspend MainScope.(String?) -> Boolean)? = null
+        private var _onQueryTextSubmit_returnValue: Boolean = false
+
+        override fun onQueryTextSubmit(query: String?): Boolean {
+            val returnValue = _onQueryTextSubmit_returnValue
+            val handler = _onQueryTextSubmit ?: return returnValue
+            mainScope.launch {
+                handler(query)
+            }
+            return returnValue
+        }
+
+        fun onQueryTextSubmit(
+                returnValue: Boolean = false,
+                listener: suspend MainScope.(String?) -> Boolean
+        ) {
+            _onQueryTextSubmit = listener
+            _onQueryTextSubmit_returnValue = returnValue
+        }
+
+        private var _onQueryTextChange: (suspend MainScope.(String?) -> Boolean)? = null
+        private var _onQueryTextChange_returnValue: Boolean = false
+
+        override fun onQueryTextChange(newText: String?): Boolean {
+            val returnValue = _onQueryTextChange_returnValue
+            val handler = _onQueryTextChange ?: return returnValue
+            mainScope.launch {
+                handler(newText)
+            }
+            return returnValue
+        }
+
+        fun onQueryTextChange(
+                returnValue: Boolean = false,
+                listener: suspend MainScope.(String?) -> Boolean
+        ) {
+            _onQueryTextChange = listener
+            _onQueryTextChange_returnValue = returnValue
+        }
+
+    }
+
+    fun SearchView.onSearchClick(
+            handler: suspend MainScope.(v: android.view.View?) -> Unit
+    ) {
+        setOnSearchClickListener { v ->
+            mainScope.launch {
+                handler(v)
+            }
+        }
+    }
+
+    fun SearchView.onSuggestionListener(
+            init: __SearchView_OnSuggestionListener.() -> Unit
+    ) {
+        val listener = __SearchView_OnSuggestionListener(mainScope)
+        listener.init()
+        setOnSuggestionListener(listener)
+    }
+
+    class __SearchView_OnSuggestionListener(private val mainScope: MainScope) : SearchView.OnSuggestionListener {
+
+        private var _onSuggestionSelect: (suspend MainScope.(Int) -> Boolean)? = null
+        private var _onSuggestionSelect_returnValue: Boolean = false
+
+        override fun onSuggestionSelect(position: Int): Boolean {
+            val returnValue = _onSuggestionSelect_returnValue
+            val handler = _onSuggestionSelect ?: return returnValue
+            mainScope.launch {
+                handler(position)
+            }
+            return returnValue
+        }
+
+        fun onSuggestionSelect(
+                returnValue: Boolean = false,
+                listener: suspend MainScope.(Int) -> Boolean
+        ) {
+            _onSuggestionSelect = listener
+            _onSuggestionSelect_returnValue = returnValue
+        }
+
+        private var _onSuggestionClick: (suspend MainScope.(Int) -> Boolean)? = null
+        private var _onSuggestionClick_returnValue: Boolean = false
+
+        override fun onSuggestionClick(position: Int): Boolean {
+            val returnValue = _onSuggestionClick_returnValue
+            val handler = _onSuggestionClick ?: return returnValue
+            mainScope.launch {
+                handler(position)
+            }
+            return returnValue
+        }
+
+        fun onSuggestionClick(
+                returnValue: Boolean = false,
+                listener: suspend MainScope.(Int) -> Boolean
+        ) {
+            _onSuggestionClick = listener
+            _onSuggestionClick_returnValue = returnValue
+        }
+
+    }
+
+    fun Toolbar.onMenuItemClick(
+            returnValue: Boolean = false,
+            handler: suspend MainScope.(item: android.view.MenuItem?) -> Unit
+    ) {
+        setOnMenuItemClickListener { item ->
+            mainScope.launch {
+                handler(item)
+            }
+            returnValue
+        }
+    }
+
+    fun ViewStubCompat.onInflate(
+            handler: suspend MainScope.(stub: ViewStubCompat?, inflated: android.view.View?) -> Unit
+    ) {
+        setOnInflateListener { stub, inflated ->
+            mainScope.launch {
+                handler(stub, inflated)
+            }
+        }
+    }
+
+}

lib_coroutines/src/main/java/com/bennyhuo/kotlin/coroutines/android/mainscope/scope/DesignScoped.kt

@@ -0,0 +1,369 @@
+package com.bennyhuo.kotlin.coroutines.android.mainscope.scope
+
+import com.bennyhuo.kotlin.coroutines.android.mainscope.MainScope
+import com.bennyhuo.kotlin.coroutines.android.mainscope.job.launch
+import com.google.android.material.appbar.AppBarLayout
+import com.google.android.material.bottomnavigation.BottomNavigationView
+import com.google.android.material.chip.ChipGroup
+import com.google.android.material.floatingactionbutton.FloatingActionButton
+import com.google.android.material.tabs.TabLayout
+
+interface DesignScoped : BasicScoped {
+
+    fun AppBarLayout.onOffsetChanged(
+            handler: suspend MainScope.(appBarLayout: AppBarLayout?, verticalOffset: Int) -> Unit
+    ) {
+        addOnOffsetChangedListener(AppBarLayout.OnOffsetChangedListener { appBarLayout, verticalOffset ->
+            mainScope.launch {
+                handler(appBarLayout, verticalOffset)
+            }
+        })
+    }
+
+    fun <T : TabLayout.Tab> TabLayout.onTabSelectedListener(
+            init: __onTabSelected_TabLayout_BaseOnTabSelectedListener<T>.() -> Unit
+    ) {
+        val listener = __onTabSelected_TabLayout_BaseOnTabSelectedListener<T>(mainScope)
+        listener.init()
+        addOnTabSelectedListener(listener)
+    }
+
+    class __onTabSelected_TabLayout_BaseOnTabSelectedListener<T : TabLayout.Tab>(private val mainScope: MainScope) : TabLayout.BaseOnTabSelectedListener<T> {
+
+        private var _onTabSelectedWithP0: (suspend MainScope.(T?) -> Unit)? = null
+
+        override fun onTabSelected(p0: T?) {
+            val handler = _onTabSelectedWithP0 ?: return
+            mainScope.launch {
+                handler(p0)
+            }
+        }
+
+        fun onTabSelected(
+                listener: suspend MainScope.(T?) -> Unit
+        ) {
+            _onTabSelectedWithP0 = listener
+        }
+
+        private var _onTabUnselectedWithP0: (suspend MainScope.(T?) -> Unit)? = null
+
+        override fun onTabUnselected(p0: T?) {
+            val handler = _onTabUnselectedWithP0 ?: return
+            mainScope.launch {
+                handler(p0)
+            }
+        }
+
+        fun onTabUnselected(
+                listener: suspend MainScope.(T?) -> Unit
+        ) {
+            _onTabUnselectedWithP0 = listener
+        }
+
+        private var _onTabReselectedWithP0: (suspend MainScope.(T?) -> Unit)? = null
+
+        override fun onTabReselected(p0: T?) {
+            val handler = _onTabReselectedWithP0 ?: return
+            mainScope.launch {
+                handler(p0)
+            }
+        }
+
+        fun onTabReselected(
+                listener: suspend MainScope.(T?) -> Unit
+        ) {
+            _onTabReselectedWithP0 = listener
+        }
+
+    }
+
+    fun FloatingActionButton.onShowAnimationListener(
+            init: __onShowAnimation_Animator_AnimatorListener.() -> Unit
+    ) {
+        val listener = __onShowAnimation_Animator_AnimatorListener(mainScope)
+        listener.init()
+        addOnShowAnimationListener(listener)
+    }
+
+    class __onShowAnimation_Animator_AnimatorListener(private val mainScope: MainScope) : android.animation.Animator.AnimatorListener {
+
+        private var _onAnimationStartWithAnimationAndIsReverse: (suspend MainScope.(android.animation.Animator?, Boolean) -> Unit)? = null
+
+        override fun onAnimationStart(animation: android.animation.Animator?, isReverse: Boolean) {
+            val handler = _onAnimationStartWithAnimationAndIsReverse ?: return
+            mainScope.launch {
+                handler(animation, isReverse)
+            }
+        }
+
+        fun onAnimationStart(
+                listener: suspend MainScope.(android.animation.Animator?, Boolean) -> Unit
+        ) {
+            _onAnimationStartWithAnimationAndIsReverse = listener
+        }
+
+        private var _onAnimationEndWithAnimationAndIsReverse: (suspend MainScope.(android.animation.Animator?, Boolean) -> Unit)? = null
+
+        override fun onAnimationEnd(animation: android.animation.Animator?, isReverse: Boolean) {
+            val handler = _onAnimationEndWithAnimationAndIsReverse ?: return
+            mainScope.launch {
+                handler(animation, isReverse)
+            }
+        }
+
+        fun onAnimationEnd(
+                listener: suspend MainScope.(android.animation.Animator?, Boolean) -> Unit
+        ) {
+            _onAnimationEndWithAnimationAndIsReverse = listener
+        }
+
+        private var _onAnimationStartWithAnimation: (suspend MainScope.(android.animation.Animator?) -> Unit)? = null
+
+
+        override fun onAnimationStart(animation: android.animation.Animator?) {
+            val handler = _onAnimationStartWithAnimation ?: return
+            mainScope.launch {
+                handler(animation)
+            }
+        }
+
+        fun onAnimationStart(
+                listener: suspend MainScope.(android.animation.Animator?) -> Unit
+        ) {
+            _onAnimationStartWithAnimation = listener
+        }
+
+        private var _onAnimationEndWithAnimation: (suspend MainScope.(android.animation.Animator?) -> Unit)? = null
+
+
+        override fun onAnimationEnd(animation: android.animation.Animator?) {
+            val handler = _onAnimationEndWithAnimation ?: return
+            mainScope.launch {
+                handler(animation)
+            }
+        }
+
+        fun onAnimationEnd(
+                listener: suspend MainScope.(android.animation.Animator?) -> Unit
+        ) {
+            _onAnimationEndWithAnimation = listener
+        }
+
+        private var _onAnimationCancelWithAnimation: (suspend MainScope.(android.animation.Animator?) -> Unit)? = null
+
+
+        override fun onAnimationCancel(animation: android.animation.Animator?) {
+            val handler = _onAnimationCancelWithAnimation ?: return
+            mainScope.launch {
+                handler(animation)
+            }
+        }
+
+        fun onAnimationCancel(
+                listener: suspend MainScope.(android.animation.Animator?) -> Unit
+        ) {
+            _onAnimationCancelWithAnimation = listener
+        }
+
+        private var _onAnimationRepeatWithAnimation: (suspend MainScope.(android.animation.Animator?) -> Unit)? = null
+
+
+        override fun onAnimationRepeat(animation: android.animation.Animator?) {
+            val handler = _onAnimationRepeatWithAnimation ?: return
+            mainScope.launch {
+                handler(animation)
+            }
+        }
+
+        fun onAnimationRepeat(
+                listener: suspend MainScope.(android.animation.Animator?) -> Unit
+        ) {
+            _onAnimationRepeatWithAnimation = listener
+        }
+
+    }
+
+    fun FloatingActionButton.onHideAnimationListener(
+            init: __onHideAnimation_Animator_AnimatorListener.() -> Unit
+    ) {
+        val listener = __onHideAnimation_Animator_AnimatorListener(mainScope)
+        listener.init()
+        addOnHideAnimationListener(listener)
+    }
+
+    class __onHideAnimation_Animator_AnimatorListener(private val mainScope: MainScope) : android.animation.Animator.AnimatorListener {
+
+        private var _onAnimationStartWithAnimationAndIsReverse: (suspend MainScope.(android.animation.Animator?, Boolean) -> Unit)? = null
+
+
+        override fun onAnimationStart(animation: android.animation.Animator?, isReverse: Boolean) {
+            val handler = _onAnimationStartWithAnimationAndIsReverse ?: return
+            mainScope.launch {
+                handler(animation, isReverse)
+            }
+        }
+
+        fun onAnimationStart(
+                listener: suspend MainScope.(android.animation.Animator?, Boolean) -> Unit
+        ) {
+            _onAnimationStartWithAnimationAndIsReverse = listener
+        }
+
+        private var _onAnimationEndWithAnimationAndIsReverse: (suspend MainScope.(android.animation.Animator?, Boolean) -> Unit)? = null
+
+
+        override fun onAnimationEnd(animation: android.animation.Animator?, isReverse: Boolean) {
+            val handler = _onAnimationEndWithAnimationAndIsReverse ?: return
+            mainScope.launch {
+                handler(animation, isReverse)
+            }
+        }
+
+        fun onAnimationEnd(
+                listener: suspend MainScope.(android.animation.Animator?, Boolean) -> Unit
+        ) {
+            _onAnimationEndWithAnimationAndIsReverse = listener
+        }
+
+        private var _onAnimationStartWithAnimation: (suspend MainScope.(android.animation.Animator?) -> Unit)? = null
+
+
+        override fun onAnimationStart(animation: android.animation.Animator?) {
+            val handler = _onAnimationStartWithAnimation ?: return
+            mainScope.launch {
+                handler(animation)
+            }
+        }
+
+        fun onAnimationStart(
+                listener: suspend MainScope.(android.animation.Animator?) -> Unit
+        ) {
+            _onAnimationStartWithAnimation = listener
+        }
+
+        private var _onAnimationEndWithAnimation: (suspend MainScope.(android.animation.Animator?) -> Unit)? = null
+
+
+        override fun onAnimationEnd(animation: android.animation.Animator?) {
+            val handler = _onAnimationEndWithAnimation ?: return
+            mainScope.launch {
+                handler(animation)
+            }
+        }
+
+        fun onAnimationEnd(
+                listener: suspend MainScope.(android.animation.Animator?) -> Unit
+        ) {
+            _onAnimationEndWithAnimation = listener
+        }
+
+        private var _onAnimationCancelWithAnimation: (suspend MainScope.(android.animation.Animator?) -> Unit)? = null
+
+
+        override fun onAnimationCancel(animation: android.animation.Animator?) {
+            val handler = _onAnimationCancelWithAnimation ?: return
+            mainScope.launch {
+                handler(animation)
+            }
+        }
+
+        fun onAnimationCancel(
+                listener: suspend MainScope.(android.animation.Animator?) -> Unit
+        ) {
+            _onAnimationCancelWithAnimation = listener
+        }
+
+        private var _onAnimationRepeatWithAnimation: (suspend MainScope.(android.animation.Animator?) -> Unit)? = null
+
+
+        override fun onAnimationRepeat(animation: android.animation.Animator?) {
+            val handler = _onAnimationRepeatWithAnimation ?: return
+            mainScope.launch {
+                handler(animation)
+            }
+        }
+
+        fun onAnimationRepeat(
+                listener: suspend MainScope.(android.animation.Animator?) -> Unit
+        ) {
+            _onAnimationRepeatWithAnimation = listener
+        }
+
+    }
+
+    fun ChipGroup.onCheckedChange(
+            handler: suspend MainScope.(p0: ChipGroup?, p1: Int) -> Unit
+    ) {
+        setOnCheckedChangeListener { p0, p1 ->
+            mainScope.launch {
+                handler(p0, p1)
+            }
+        }
+    }
+
+    fun ChipGroup.onHierarchyChangeListener(
+            init: __onHierarchyChange_ViewGroup_OnHierarchyChangeListener.() -> Unit
+    ) {
+        val listener = __onHierarchyChange_ViewGroup_OnHierarchyChangeListener(mainScope)
+        listener.init()
+        setOnHierarchyChangeListener(listener)
+    }
+
+    class __onHierarchyChange_ViewGroup_OnHierarchyChangeListener(private val mainScope: MainScope) : android.view.ViewGroup.OnHierarchyChangeListener {
+
+        private var _onChildViewAddedWithParentAndChild: (suspend MainScope.(android.view.View?, android.view.View?) -> Unit)? = null
+
+
+        override fun onChildViewAdded(parent: android.view.View?, child: android.view.View?) {
+            val handler = _onChildViewAddedWithParentAndChild ?: return
+            mainScope.launch {
+                handler(parent, child)
+            }
+        }
+
+        fun onChildViewAdded(
+                listener: suspend MainScope.(android.view.View?, android.view.View?) -> Unit
+        ) {
+            _onChildViewAddedWithParentAndChild = listener
+        }
+
+        private var _onChildViewRemovedWithParentAndChild: (suspend MainScope.(android.view.View?, android.view.View?) -> Unit)? = null
+
+        override fun onChildViewRemoved(parent: android.view.View?, child: android.view.View?) {
+            val handler = _onChildViewRemovedWithParentAndChild ?: return
+            mainScope.launch {
+                handler(parent, child)
+            }
+        }
+
+        fun onChildViewRemoved(
+                listener: suspend MainScope.(android.view.View?, android.view.View?) -> Unit
+        ) {
+            _onChildViewRemovedWithParentAndChild = listener
+        }
+
+    }
+
+    fun BottomNavigationView.onNavigationItemReselected(
+            handler: suspend MainScope.(item: android.view.MenuItem) -> Unit
+    ) {
+        setOnNavigationItemReselectedListener { item ->
+            mainScope.launch {
+                handler(item)
+            }
+        }
+    }
+
+    fun BottomNavigationView.onNavigationItemSelected(
+            returnValue: Boolean = false,
+            handler: suspend MainScope.(item: android.view.MenuItem) -> Unit
+    ) {
+        setOnNavigationItemSelectedListener { item ->
+            mainScope.launch {
+                handler(item)
+            }
+            returnValue
+        }
+    }
+
+}

lib_coroutines/src/main/java/com/bennyhuo/kotlin/coroutines/android/mainscope/scope/MainScoped.kt

@@ -0,0 +1,73 @@
+package com.bennyhuo.kotlin.coroutines.android.mainscope.scope
+
+import android.app.Activity
+import android.os.Looper
+import androidx.fragment.app.Fragment
+import com.bennyhuo.kotlin.coroutines.android.mainscope.EmptyScope
+import com.bennyhuo.kotlin.coroutines.android.mainscope.MainScope
+import com.bennyhuo.kotlin.coroutines.android.mainscope.MainScopeImpl
+import com.bennyhuo.kotlin.coroutines.android.mainscope.exception.UnsupportedTypeException
+import com.bennyhuo.kotlin.coroutines.android.mainscope.exception.UnsupportedVersionException
+import com.bennyhuo.kotlin.coroutines.android.mainscope.utils.Logcat
+import kotlinx.coroutines.cancel
+import java.util.*
+
+interface MainScoped {
+
+    companion object {
+        internal val scopeMap = IdentityHashMap<MainScoped, MainScope>()
+    }
+
+    val mainScope: MainScope
+        get() {
+            if(!MainScope.isSetUp){
+                throw IllegalStateException("MainScope has not been set up yet! Call `MainScope.setUp(application)` once your customized Application created.")
+            }
+            if(Thread.currentThread() != Looper.getMainLooper().thread){
+                throw IllegalAccessException("MainScope must be accessed from the UI main thread.")
+            }
+            return (scopeMap[this]) ?: run {
+                if(isDestroyed()){
+                    Logcat.debug("Access MainScope when scoped instance:$this is FINISHING. EmptyScope will be returned.")
+                    EmptyScope
+                } else {
+                    Logcat.warn("Create MainScope for scoped instance: $this")
+                    MainScopeImpl().also { scopeMap[this] = it }
+                }
+            }
+        }
+}
+
+private fun MainScoped.isDestroyed(): Boolean {
+    return when{
+        this is Activity ->{
+            this.isFinishing
+        }
+        MainScope.isFragmentSupported && this is Fragment ->{
+            this.activity?.isFinishing?: true || this.isRemoving ||this.view == null
+        }
+        else ->{
+            val fragmentClass = try {
+                Class.forName("android.support.v4.app.Fragment")
+            } catch (e: Exception) {
+                null
+            }
+            fragmentClass?.let {
+                if(it.isAssignableFrom(this.javaClass)){
+                    throw UnsupportedVersionException("com.android.support:support-fragment", "<25.1.0")
+                }
+            }
+            throw UnsupportedTypeException(this.javaClass, "android.app.Activity", "android.support.v4.app.Fragment")
+        }
+    }
+}
+
+inline fun <T> MainScoped.withMainScope(block: MainScope.() -> T) = with(mainScope, block)
+
+internal fun MainScoped.onMainScopeCreate() {
+    //won't create immediately.
+}
+
+internal fun MainScoped.onMainScopeDestroy() {
+    MainScoped.scopeMap.remove(this)?.cancel()
+}

lib_coroutines/src/main/java/com/bennyhuo/kotlin/coroutines/android/mainscope/scope/RecyclerViewScoped.kt

@@ -0,0 +1,115 @@
+package com.bennyhuo.kotlin.coroutines.android.mainscope.scope
+
+import androidx.recyclerview.widget.RecyclerView
+import com.bennyhuo.kotlin.coroutines.android.mainscope.MainScope
+import com.bennyhuo.kotlin.coroutines.android.mainscope.job.launch
+
+interface RecyclerViewScoped : BasicScoped {
+
+    fun RecyclerView.onChildAttachStateChangeListener(
+            init: __RecyclerView_OnChildAttachStateChangeListener.() -> Unit
+    ) {
+        val listener = __RecyclerView_OnChildAttachStateChangeListener(mainScope)
+        listener.init()
+        addOnChildAttachStateChangeListener(listener)
+    }
+
+    class __RecyclerView_OnChildAttachStateChangeListener(private val mainScope: MainScope) : RecyclerView.OnChildAttachStateChangeListener {
+
+        private var _onChildViewAttachedToWindow: (suspend MainScope.(android.view.View) -> Unit)? = null
+
+        override fun onChildViewAttachedToWindow(view: android.view.View) {
+            val handler = _onChildViewAttachedToWindow ?: return
+            mainScope.launch {
+                handler(view)
+            }
+        }
+
+        fun onChildViewAttachedToWindow(
+                listener: suspend MainScope.(android.view.View) -> Unit
+        ) {
+            _onChildViewAttachedToWindow = listener
+        }
+
+        private var _onChildViewDetachedFromWindow: (suspend MainScope.(android.view.View) -> Unit)? = null
+
+
+        override fun onChildViewDetachedFromWindow(view: android.view.View) {
+            val handler = _onChildViewDetachedFromWindow ?: return
+            mainScope.launch {
+                handler(view)
+            }
+        }
+
+        fun onChildViewDetachedFromWindow(
+                listener: suspend MainScope.(android.view.View) -> Unit
+        ) {
+            _onChildViewDetachedFromWindow = listener
+        }
+
+    }
+
+    fun RecyclerView.onItemTouchListener(
+            init: __RecyclerView_OnItemTouchListener.() -> Unit
+    ) {
+        val listener = __RecyclerView_OnItemTouchListener(mainScope)
+        listener.init()
+        addOnItemTouchListener(listener)
+    }
+
+    class __RecyclerView_OnItemTouchListener(private val mainScope: MainScope) : RecyclerView.OnItemTouchListener {
+
+        private var _onInterceptTouchEvent: (suspend MainScope.(RecyclerView, android.view.MotionEvent) -> Boolean)? = null
+        private var _onInterceptTouchEvent_returnValue: Boolean = false
+
+        override fun onInterceptTouchEvent(rv: RecyclerView, e: android.view.MotionEvent): Boolean {
+            val returnValue = _onInterceptTouchEvent_returnValue
+            val handler = _onInterceptTouchEvent ?: return returnValue
+            mainScope.launch {
+                handler(rv, e)
+            }
+            return returnValue
+        }
+
+        fun onInterceptTouchEvent(
+                returnValue: Boolean = false,
+                listener: suspend MainScope.(RecyclerView, android.view.MotionEvent) -> Boolean
+        ) {
+            _onInterceptTouchEvent = listener
+            _onInterceptTouchEvent_returnValue = returnValue
+        }
+
+        private var _onTouchEvent: (suspend MainScope.(RecyclerView, android.view.MotionEvent) -> Unit)? = null
+
+        override fun onTouchEvent(rv: RecyclerView, e: android.view.MotionEvent) {
+            val handler = _onTouchEvent ?: return
+            mainScope.launch {
+                handler(rv, e)
+            }
+        }
+
+        fun onTouchEvent(
+                listener: suspend MainScope.(RecyclerView, android.view.MotionEvent) -> Unit
+        ) {
+            _onTouchEvent = listener
+        }
+
+        private var _onRequestDisallowInterceptTouchEvent: (suspend MainScope.(Boolean) -> Unit)? = null
+
+
+        override fun onRequestDisallowInterceptTouchEvent(disallowIntercept: Boolean) {
+            val handler = _onRequestDisallowInterceptTouchEvent ?: return
+            mainScope.launch {
+                handler(disallowIntercept)
+            }
+        }
+
+        fun onRequestDisallowInterceptTouchEvent(
+                listener: suspend MainScope.(Boolean) -> Unit
+        ) {
+            _onRequestDisallowInterceptTouchEvent = listener
+        }
+
+    }
+
+}

lib_coroutines/src/main/java/com/bennyhuo/kotlin/coroutines/android/mainscope/utils/Logger.kt

@@ -0,0 +1,22 @@
+package com.bennyhuo.kotlin.coroutines.android.mainscope.utils
+
+import android.util.Log
+import com.bennyhuo.kotlin.coroutines.android.mainscope.MainScope
+
+object Logcat {
+
+    private const val TAG = "MainScope"
+
+    fun debug(log: Any?) = MainScope.isDebug.whenTrue { Log.d(TAG, log.toString()) }
+
+    fun warn(log: Any?) = MainScope.isDebug.whenTrue { Log.w(TAG, log.toString()) }
+
+    fun error(log: Any?) = MainScope.isDebug.whenTrue { Log.e(TAG, log.toString()) }
+
+    private fun Boolean.whenTrue(block: () -> Unit) {
+        if (this) {
+            block()
+        }
+    }
+
+}