diff --git a/app/src/main/java/com/d4rk/androidtutorials/java/ui/screens/main/MainActivity.java b/app/src/main/java/com/d4rk/androidtutorials/java/ui/screens/main/MainActivity.java
index 69803624..3308efb4 100644
--- a/app/src/main/java/com/d4rk/androidtutorials/java/ui/screens/main/MainActivity.java
+++ b/app/src/main/java/com/d4rk/androidtutorials/java/ui/screens/main/MainActivity.java
@@ -24,6 +24,7 @@
 import androidx.lifecycle.ViewModelProvider;
 import androidx.navigation.NavController;
 import androidx.navigation.NavGraph;
+import androidx.navigation.NavOptions;
 import androidx.navigation.fragment.NavHostFragment;
 import androidx.navigation.ui.AppBarConfiguration;
 import androidx.navigation.ui.NavigationUI;
@@ -217,10 +218,25 @@ private void observeViewModel() {
 navGraph.setStartDestination(uiState.getDefaultNavDestination());
 navController.setGraph(navGraph);
 
+ NavOptions springNavOptions = new NavOptions.Builder()
+ .setEnterAnim(R.anim.fragment_spring_enter)
+ .setExitAnim(R.anim.fragment_spring_exit)
+ .setPopEnterAnim(R.anim.fragment_spring_pop_enter)
+ .setPopExitAnim(R.anim.fragment_spring_pop_exit)
+ .build();
+
 if (mBinding.navView instanceof BottomNavigationView bottomNav) {
 NavigationUI.setupWithNavController(bottomNav, navController);
+ bottomNav.setOnItemSelectedListener(item -> {
+ navController.navigate(item.getItemId(), null, springNavOptions);
+ return true;
+ });
 } else if (mBinding.navView instanceof NavigationRailView railView) {
 NavigationUI.setupWithNavController(railView, navController);
+ railView.setOnItemSelectedListener(item -> {
+ navController.navigate(item.getItemId(), null, springNavOptions);
+ return true;
+ });
 }
 
 setSupportActionBar(mBinding.toolbar);
diff --git a/app/src/main/res/anim/fragment_spring_enter.xml b/app/src/main/res/anim/fragment_spring_enter.xml
new file mode 100644
index 00000000..0bded03a
--- /dev/null
+++ b/app/src/main/res/anim/fragment_spring_enter.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+ <div class="naked_tr">+ <alpha + android:fromAlpha="0" + android:toAlpha="1" + android:duration="300" + android:interpolator="@interpolator/fragment_spring" />
+</set>
diff --git a/app/src/main/res/anim/fragment_spring_exit.xml b/app/src/main/res/anim/fragment_spring_exit.xml
new file mode 100644
index 00000000..e7d0be19
--- /dev/null
+++ b/app/src/main/res/anim/fragment_spring_exit.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+ <div class="naked_tr">+ <alpha + android:fromAlpha="1" + android:toAlpha="0" + android:duration="300" + android:interpolator="@interpolator/fragment_spring" />
+</set>
diff --git a/app/src/main/res/anim/fragment_spring_pop_enter.xml b/app/src/main/res/anim/fragment_spring_pop_enter.xml
new file mode 100644
index 00000000..f734c469
--- /dev/null
+++ b/app/src/main/res/anim/fragment_spring_pop_enter.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+ <div class="naked_tr">+ <alpha + android:fromAlpha="0" + android:toAlpha="1" + android:duration="300" + android:interpolator="@interpolator/fragment_spring" />
+</set>
diff --git a/app/src/main/res/anim/fragment_spring_pop_exit.xml b/app/src/main/res/anim/fragment_spring_pop_exit.xml
new file mode 100644
index 00000000..3ef11c06
--- /dev/null
+++ b/app/src/main/res/anim/fragment_spring_pop_exit.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+ <div class="naked_tr">+ <alpha + android:fromAlpha="1" + android:toAlpha="0" + android:duration="300" + android:interpolator="@interpolator/fragment_spring" />
+</set>
diff --git a/app/src/main/res/interpolator/fragment_spring.xml b/app/src/main/res/interpolator/fragment_spring.xml
new file mode 100644
index 00000000..8621c6b4
--- /dev/null
+++ b/app/src/main/res/interpolator/fragment_spring.xml
@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="utf-8"?>
+<overshootinterpolator xmlns:android="http://schemas.android.com/apk/res/android" + android:tension="1.0"/>
diff --git a/app/src/main/res/transition/fragment_spring.xml b/app/src/main/res/transition/fragment_spring.xml
new file mode 100644
index 00000000..9f2ecf81
--- /dev/null
+++ b/app/src/main/res/transition/fragment_spring.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<div class="naked_tr">+ <changebounds + android:duration="300" + android:interpolator="@interpolator/fragment_spring" />
+ <fade + android:duration="300" + android:interpolator="@interpolator/fragment_spring" />
+</transitionset>
</div><div class="naked_ctrl">
<form action="/index.cgi/contrast" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="https://patch-diff.githubusercontent.com/raw/MihaiCristianCondrea/Android-Studio-Tutorials-Java-Edition/pull/76.diff">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="https://patch-diff.githubusercontent.com/raw/MihaiCristianCondrea/Android-Studio-Tutorials-Java-Edition/pull/76.diff" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast" selected="selected">配色反転</option>
<option value="larger-text">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>