diff --git a/app/src/main/java/keijumt/devandroid/App.kt b/app/src/main/java/keijumt/devandroid/App.kt
index 0960faa..b420221 100644
--- a/app/src/main/java/keijumt/devandroid/App.kt
+++ b/app/src/main/java/keijumt/devandroid/App.kt
@@ -1,9 +1,81 @@
 package keijumt.devandroid
 
+import android.app.Activity
 import android.app.Application
+import android.os.Bundle
+import android.support.v4.app.Fragment
+import android.support.v4.app.FragmentActivity
+import android.support.v4.app.FragmentManager
+import dagger.android.AndroidInjection
+import dagger.android.AndroidInjector
+import dagger.android.support.AndroidSupportInjection
+import dagger.android.support.DaggerApplication
+import dagger.android.support.HasSupportFragmentInjector
+import keijumt.devandroid.di.Injectable
+import keijumt.devandroid.di.Injector
 
-class App : Application() {
+class App : DaggerApplication() {
+
+    companion object {
+        /**
+         * Activity に dagger#inject を注入
+         *
+         * @param activity 注入したい Activity instance
+         */
+        private fun handleActivity(activity: Activity) {
+            if (activity is HasSupportFragmentInjector) {
+                AndroidInjection.inject(activity) /// Inject!!!!
+            }
+            (activity as? FragmentActivity)?.supportFragmentManager?.registerFragmentLifecycleCallbacks(
+                    object : FragmentManager.FragmentLifecycleCallbacks() {
+                        override fun onFragmentCreated(fm: FragmentManager?, f: Fragment?,
+                                                       savedInstanceState: Bundle?) {
+                            if (f is Injectable) {
+                                AndroidSupportInjection.inject(f)
+                            }
+                        }
+                    }, true)
+        }
+    }
+
     override fun onCreate() {
         super.onCreate()
+        setupActivityLifecycle()
+    }
+
+    override fun applicationInjector(): AndroidInjector<out DaggerApplication> {
+        return Injector.setup(this)
+    }
+
+    /**
+     * Activity ライフサイクル カスタマイズ
+     */
+    private fun setupActivityLifecycle() {
+        registerActivityLifecycleCallbacks(object : Application.ActivityLifecycleCallbacks {
+            override fun onActivityPaused(activity: Activity?) {
+            }
+
+            override fun onActivityResumed(activity: Activity?) {
+            }
+
+            override fun onActivityStarted(activity: Activity?) {
+            }
+
+            override fun onActivityDestroyed(activity: Activity?) {
+            }
+
+            override fun onActivitySaveInstanceState(activity: Activity?, bundle: Bundle?) {
+            }
+
+            override fun onActivityStopped(activity: Activity?) {
+            }
+
+            override fun onActivityCreated(activity: Activity?, bundle: Bundle?) {
+                activity?.let {
+                    handleActivity(it)
+                }
+            }
+
+        })
     }
 }
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