diff --git a/app/src/main/java/app/fedilab/android/peertube/activities/ShowAccountActivity.java b/app/src/main/java/app/fedilab/android/peertube/activities/ShowAccountActivity.java
index 97093aa1..15a6ec30 100644
--- a/app/src/main/java/app/fedilab/android/peertube/activities/ShowAccountActivity.java
+++ b/app/src/main/java/app/fedilab/android/peertube/activities/ShowAccountActivity.java
@@ -29,7 +29,6 @@ import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.widget.EditText;
-import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.TextView;
 import android.widget.Toast;
@@ -48,6 +47,7 @@ import com.google.android.material.tabs.TabLayout;
 import org.jetbrains.annotations.NotNull;
 
 import app.fedilab.android.R;
+import app.fedilab.android.databinding.ActivityShowAccountPeertubeBinding;
 import app.fedilab.android.mastodon.activities.BaseBarActivity;
 import app.fedilab.android.peertube.client.APIResponse;
 import app.fedilab.android.peertube.client.RetrofitPeertubeAPI;
@@ -64,25 +64,18 @@ import es.dmoral.toasty.Toasty;
 public class ShowAccountActivity extends BaseBarActivity {
 
 
-    private ViewPager mPager;
-    private TabLayout tabLayout;
-    private TextView account_note, subscriber_count;
-    private ImageView account_pp;
-    private TextView account_dn;
     private AccountData.PeertubeAccount account;
     private String accountAcct;
-
+    private ActivityShowAccountPeertubeBinding binding;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_show_account_peertube);
+        binding = ActivityShowAccountPeertubeBinding.inflate(getLayoutInflater());
+        setContentView(binding.getRoot());
         setTitle("");
         Bundle b = getIntent().getExtras();
-        subscriber_count = findViewById(R.id.subscriber_count);
-        account_pp = findViewById(R.id.account_pp);
-        account_dn = findViewById(R.id.account_dn);
-        account_pp.setBackgroundResource(R.drawable.account_pp_border);
+        binding.accountPp.setBackgroundResource(R.drawable.account_pp_border);
         if (b != null) {
             account = (AccountData.PeertubeAccount) b.getSerializable("account");
             accountAcct = b.getString("accountAcct");
@@ -94,8 +87,7 @@ public class ShowAccountActivity extends BaseBarActivity {
             getSupportActionBar().setDisplayHomeAsUpEnabled(true);
         }
 
-        tabLayout = findViewById(R.id.account_tabLayout);
-        account_note = findViewById(R.id.account_note);
+
 
         manageAccount();
         AccountsVM viewModel = new ViewModelProvider(ShowAccountActivity.this).get(AccountsVM.class);
@@ -158,14 +150,13 @@ public class ShowAccountActivity extends BaseBarActivity {
 
         setTitle(account.getAcct());
 
-        mPager = findViewById(R.id.account_viewpager);
-        tabLayout.addTab(tabLayout.newTab().setText(getString(R.string.channels)));
-        tabLayout.addTab(tabLayout.newTab().setText(getString(R.string.videos)));
-        mPager.setOffscreenPageLimit(2);
+        binding.accountTabLayout.addTab(binding.accountTabLayout.newTab().setText(getString(R.string.channels)));
+        binding.accountTabLayout.addTab(binding.accountTabLayout.newTab().setText(getString(R.string.videos)));
+        binding.accountViewpager.setOffscreenPageLimit(2);
 
         PagerAdapter mPagerAdapter = new ScreenSlidePagerAdapter(getSupportFragmentManager());
-        mPager.setAdapter(mPagerAdapter);
-        mPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
+        binding.accountViewpager.setAdapter(mPagerAdapter);
+        binding.accountViewpager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
             @Override
             public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 
@@ -173,7 +164,7 @@ public class ShowAccountActivity extends BaseBarActivity {
 
             @Override
             public void onPageSelected(int position) {
-                TabLayout.Tab tab = tabLayout.getTabAt(position);
+                TabLayout.Tab tab = binding.accountTabLayout.getTabAt(position);
                 if (tab != null)
                     tab.select();
             }
@@ -184,10 +175,10 @@ public class ShowAccountActivity extends BaseBarActivity {
             }
         });
 
-        tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
+        binding.accountTabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
             @Override
             public void onTabSelected(TabLayout.Tab tab) {
-                mPager.setCurrentItem(tab.getPosition());
+                binding.accountViewpager.setCurrentItem(tab.getPosition());
             }
 
             @Override
@@ -198,8 +189,8 @@ public class ShowAccountActivity extends BaseBarActivity {
             @Override
             public void onTabReselected(TabLayout.Tab tab) {
                 Fragment fragment = null;
-                if (mPager.getAdapter() != null)
-                    fragment = (Fragment) mPager.getAdapter().instantiateItem(mPager, tab.getPosition());
+                if (binding.accountViewpager.getAdapter() != null)
+                    fragment = (Fragment) binding.accountViewpager.getAdapter().instantiateItem(binding.accountViewpager, tab.getPosition());
                 switch (tab.getPosition()) {
                     case 0:
                         if (fragment != null) {
@@ -217,10 +208,10 @@ public class ShowAccountActivity extends BaseBarActivity {
             }
         });
 
-        account_dn.setText(account.getDisplayName());
+        binding.accountDn.setText(account.getDisplayName());
 
         manageNotes(account);
-        Helper.loadAvatar(ShowAccountActivity.this, account, account_pp);
+        Helper.loadAvatar(ShowAccountActivity.this, account, binding.accountPp);
     }
 
     @Override
@@ -252,8 +243,8 @@ public class ShowAccountActivity extends BaseBarActivity {
                 this.account = account;
                 manageAccount();
             }
-            subscriber_count.setText(getString(R.string.followers_count, Helper.withSuffix(account.getFollowersCount())));
-            subscriber_count.setVisibility(View.VISIBLE);
+            binding.subscriberCount.setText(getString(R.string.followers_count, Helper.withSuffix(account.getFollowersCount())));
+            binding.subscriberCount.setVisibility(View.VISIBLE);
             manageNotes(account);
         }
     }
@@ -266,11 +257,11 @@ public class ShowAccountActivity extends BaseBarActivity {
             else
                 spannableString = new SpannableString(Html.fromHtml(account.getDescription()));
 
-            account_note.setText(spannableString, TextView.BufferType.SPANNABLE);
-            account_note.setMovementMethod(LinkMovementMethod.getInstance());
-            account_note.setVisibility(View.VISIBLE);
+            binding.accountNote.setText(spannableString, TextView.BufferType.SPANNABLE);
+            binding.accountNote.setMovementMethod(LinkMovementMethod.getInstance());
+            binding.accountNote.setVisibility(View.VISIBLE);
         } else {
-            account_note.setVisibility(View.GONE);
+            binding.accountNote.setVisibility(View.GONE);
         }
     }
 
diff --git a/app/src/main/res/layouts/peertube/layout/activity_my_account_settings_peertube.xml b/app/src/main/res/layouts/peertube/layout/activity_my_account_settings_peertube.xml
index 6a9aea53..d35b2367 100644
--- a/app/src/main/res/layouts/peertube/layout/activity_my_account_settings_peertube.xml
+++ b/app/src/main/res/layouts/peertube/layout/activity_my_account_settings_peertube.xml
@@ -8,7 +8,7 @@
         android:layout_width="match_parent"
         android:layout_height="wrap_content">
 
-        <ImageView
+        <androidx.appcompat.widget.AppCompatImageView
             android:id="@+id/profile_picture"
             android:layout_width="80dp"
             android:layout_height="80dp"
@@ -18,15 +18,14 @@
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toTopOf="parent" />
 
-        <Button
+        <com.google.android.material.button.MaterialButton
             android:id="@+id/select_file"
-            style="@style/Widget.AppCompat.Button.Borderless"
+            style="@style/Widget.Material3.Button.OutlinedButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_marginStart="20dp"
             android:singleLine="true"
             android:text="@string/change_profile_picture"
-            android:textColor="?attr/colorAccent"
             app:layout_constraintBottom_toBottomOf="@id/profile_picture"
             app:layout_constraintStart_toEndOf="@+id/profile_picture" />
 
@@ -76,7 +75,7 @@
                 android:singleLine="false" />
         </com.google.android.material.textfield.TextInputLayout>
 
-        <TextView
+        <androidx.appcompat.widget.AppCompatTextView
             android:id="@+id/notification_title"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
@@ -84,12 +83,12 @@
             android:layout_marginTop="20dp"
             android:text="@string/title_notifications"
             android:textAllCaps="true"
-            android:textColor="?attr/colorAccent"
+            android:textColor="?attr/colorPrimary"
             android:textSize="18sp"
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toBottomOf="@+id/description_container" />
 
-        <TextView
+        <androidx.appcompat.widget.AppCompatTextView
             android:id="@+id/spinner_indication"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
@@ -112,7 +111,7 @@
             app:layout_constraintStart_toEndOf="@+id/spinner_indication"
             app:layout_constraintTop_toBottomOf="@+id/notification_title" />
 
-        <LinearLayout
+        <androidx.appcompat.widget.LinearLayoutCompat
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:layout_margin="20dp"
@@ -121,248 +120,248 @@
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toBottomOf="@+id/refresh_time">
 
-            <LinearLayout
+            <androidx.appcompat.widget.LinearLayoutCompat
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:orientation="horizontal">
 
-                <TextView
+                <androidx.appcompat.widget.AppCompatTextView
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="10"
                     android:text="@string/activity"
                     android:textStyle="bold" />
 
-                <TextView
+                <androidx.appcompat.widget.AppCompatTextView
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1"
                     android:text="@string/app"
                     android:textStyle="bold" />
 
-                <TextView
+                <androidx.appcompat.widget.AppCompatTextView
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1"
                     android:text="@string/email"
                     android:textStyle="bold" />
-            </LinearLayout>
+            </androidx.appcompat.widget.LinearLayoutCompat>
 
-            <LinearLayout
+            <androidx.appcompat.widget.LinearLayoutCompat
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:orientation="horizontal">
 
-                <TextView
+                <androidx.appcompat.widget.AppCompatTextView
                     android:layout_width="0dp"
                     android:layout_height="wrap_content"
                     android:layout_weight="10"
                     android:text="@string/notif_new_video" />
 
-                <androidx.appcompat.widget.SwitchCompat
+                <com.google.android.material.switchmaterial.SwitchMaterial
                     android:id="@+id/notif_new_video_app"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1" />
 
-                <androidx.appcompat.widget.SwitchCompat
+                <com.google.android.material.switchmaterial.SwitchMaterial
                     android:id="@+id/notif_new_video_mail"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1" />
-            </LinearLayout>
+            </androidx.appcompat.widget.LinearLayoutCompat>
 
-            <LinearLayout
+            <androidx.appcompat.widget.LinearLayoutCompat
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:orientation="horizontal">
 
-                <TextView
+                <androidx.appcompat.widget.AppCompatTextView
                     android:layout_width="0dp"
                     android:layout_height="wrap_content"
                     android:layout_weight="10"
                     android:text="@string/notif_new_comment" />
 
-                <androidx.appcompat.widget.SwitchCompat
+                <com.google.android.material.switchmaterial.SwitchMaterial
                     android:id="@+id/notif_new_comment_app"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1" />
 
-                <androidx.appcompat.widget.SwitchCompat
+                <com.google.android.material.switchmaterial.SwitchMaterial
                     android:id="@+id/notif_new_comment_mail"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1" />
-            </LinearLayout>
+            </androidx.appcompat.widget.LinearLayoutCompat>
 
-            <LinearLayout
+            <androidx.appcompat.widget.LinearLayoutCompat
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:orientation="horizontal">
 
-                <TextView
+                <androidx.appcompat.widget.AppCompatTextView
                     android:layout_width="0dp"
                     android:layout_height="wrap_content"
                     android:layout_weight="10"
                     android:text="@string/notif_blocked" />
 
-                <androidx.appcompat.widget.SwitchCompat
+                <com.google.android.material.switchmaterial.SwitchMaterial
                     android:id="@+id/notif_blocked_app"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1" />
 
-                <androidx.appcompat.widget.SwitchCompat
+                <com.google.android.material.switchmaterial.SwitchMaterial
                     android:id="@+id/notif_blocked_mail"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1" />
-            </LinearLayout>
+            </androidx.appcompat.widget.LinearLayoutCompat>
 
-            <LinearLayout
+            <androidx.appcompat.widget.LinearLayoutCompat
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:orientation="horizontal">
 
-                <TextView
+                <androidx.appcompat.widget.AppCompatTextView
                     android:layout_width="0dp"
                     android:layout_height="wrap_content"
                     android:layout_weight="10"
                     android:text="@string/notif_video_published" />
 
-                <androidx.appcompat.widget.SwitchCompat
+                <com.google.android.material.switchmaterial.SwitchMaterial
                     android:id="@+id/notif_video_published_app"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1" />
 
-                <androidx.appcompat.widget.SwitchCompat
+                <com.google.android.material.switchmaterial.SwitchMaterial
                     android:id="@+id/notif_video_published_mail"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1" />
-            </LinearLayout>
+            </androidx.appcompat.widget.LinearLayoutCompat>
 
-            <LinearLayout
+            <androidx.appcompat.widget.LinearLayoutCompat
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:orientation="horizontal">
 
-                <TextView
+                <androidx.appcompat.widget.AppCompatTextView
                     android:layout_width="0dp"
                     android:layout_height="wrap_content"
                     android:layout_weight="10"
                     android:text="@string/notif_video_imported" />
 
-                <androidx.appcompat.widget.SwitchCompat
+                <com.google.android.material.switchmaterial.SwitchMaterial
                     android:id="@+id/notif_video_imported_app"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1" />
 
-                <androidx.appcompat.widget.SwitchCompat
+                <com.google.android.material.switchmaterial.SwitchMaterial
                     android:id="@+id/notif_video_imported_mail"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1" />
-            </LinearLayout>
+            </androidx.appcompat.widget.LinearLayoutCompat>
 
-            <LinearLayout
+            <androidx.appcompat.widget.LinearLayoutCompat
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:orientation="horizontal">
 
-                <TextView
+                <androidx.appcompat.widget.AppCompatTextView
                     android:layout_width="0dp"
                     android:layout_height="wrap_content"
                     android:layout_weight="10"
                     android:text="@string/notif_new_followers" />
 
-                <androidx.appcompat.widget.SwitchCompat
+                <com.google.android.material.switchmaterial.SwitchMaterial
                     android:id="@+id/notif_new_followers_app"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1" />
 
-                <androidx.appcompat.widget.SwitchCompat
+                <com.google.android.material.switchmaterial.SwitchMaterial
                     android:id="@+id/notif_new_followers_mail"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1" />
-            </LinearLayout>
+            </androidx.appcompat.widget.LinearLayoutCompat>
 
-            <LinearLayout
+            <androidx.appcompat.widget.LinearLayoutCompat
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:orientation="horizontal">
 
-                <TextView
+                <androidx.appcompat.widget.AppCompatTextView
                     android:layout_width="0dp"
                     android:layout_height="wrap_content"
                     android:layout_weight="10"
                     android:text="@string/notif_video_mention" />
 
-                <androidx.appcompat.widget.SwitchCompat
+                <com.google.android.material.switchmaterial.SwitchMaterial
                     android:id="@+id/notif_video_mention_app"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1" />
 
-                <androidx.appcompat.widget.SwitchCompat
+                <com.google.android.material.switchmaterial.SwitchMaterial
                     android:id="@+id/notif_video_mention_mail"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1" />
-            </LinearLayout>
+            </androidx.appcompat.widget.LinearLayoutCompat>
 
-            <LinearLayout
+            <androidx.appcompat.widget.LinearLayoutCompat
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:orientation="horizontal">
 
-                <TextView
+                <androidx.appcompat.widget.AppCompatTextView
                     android:layout_width="0dp"
                     android:layout_height="wrap_content"
                     android:layout_weight="10"
                     android:text="@string/notif_abuse_received" />
 
-                <androidx.appcompat.widget.SwitchCompat
+                <com.google.android.material.switchmaterial.SwitchMaterial
                     android:id="@+id/notif_abuse_received_app"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1" />
 
-                <androidx.appcompat.widget.SwitchCompat
+                <com.google.android.material.switchmaterial.SwitchMaterial
                     android:id="@+id/notif_abuse_received_mail"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1" />
-            </LinearLayout>
+            </androidx.appcompat.widget.LinearLayoutCompat>
 
-            <LinearLayout
+            <androidx.appcompat.widget.LinearLayoutCompat
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:orientation="horizontal">
 
-                <TextView
+                <androidx.appcompat.widget.AppCompatTextView
                     android:layout_width="0dp"
                     android:layout_height="wrap_content"
                     android:layout_weight="10"
                     android:text="@string/notif_abuse_accepted" />
 
-                <androidx.appcompat.widget.SwitchCompat
+                <com.google.android.material.switchmaterial.SwitchMaterial
                     android:id="@+id/notif_abuse_accepted_app"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1" />
 
-                <androidx.appcompat.widget.SwitchCompat
+                <com.google.android.material.switchmaterial.SwitchMaterial
                     android:id="@+id/notif_abuse_accepted_mail"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1" />
-            </LinearLayout>
-        </LinearLayout>
+            </androidx.appcompat.widget.LinearLayoutCompat>
+        </androidx.appcompat.widget.LinearLayoutCompat>
     </androidx.constraintlayout.widget.ConstraintLayout>
 </ScrollView>
diff --git a/app/src/main/res/layouts/peertube/layout/activity_show_account_peertube.xml b/app/src/main/res/layouts/peertube/layout/activity_show_account_peertube.xml
index 7e9f0d9b..0fa5c1ee 100644
--- a/app/src/main/res/layouts/peertube/layout/activity_show_account_peertube.xml
+++ b/app/src/main/res/layouts/peertube/layout/activity_show_account_peertube.xml
@@ -25,14 +25,12 @@
     <com.google.android.material.appbar.AppBarLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:fitsSystemWindows="true"
-        app:theme="@style/ThemeOverlay.AppCompat.ActionBar">
+        android:fitsSystemWindows="true">
 
         <com.google.android.material.appbar.CollapsingToolbarLayout
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:fitsSystemWindows="true"
-            app:contentScrim="?attr/colorPrimary"
             app:expandedTitleMarginEnd="64dp"
             app:expandedTitleMarginStart="48dp"
             app:layout_scrollFlags="scroll|exitUntilCollapsed">
@@ -66,7 +64,6 @@
                         android:layout_marginStart="10dp"
                         android:singleLine="true"
                         android:textAppearance="@style/TextAppearance.AppCompat.Body1"
-                        android:textColor="@android:color/white"
                         android:textSize="18sp"
                         app:layout_constraintBottom_toTopOf="@+id/subscriber_count"
                         app:layout_constraintStart_toEndOf="@+id/account_pp"
@@ -81,7 +78,6 @@
                         android:gravity="center_vertical"
                         android:singleLine="true"
                         android:textAppearance="@style/TextAppearance.AppCompat.Body1"
-                        android:textColor="@android:color/white"
                         android:visibility="invisible"
                         app:layout_constraintBottom_toBottomOf="parent"
                         app:layout_constraintStart_toEndOf="@+id/account_pp"
@@ -90,7 +86,7 @@
 
                 </androidx.constraintlayout.widget.ConstraintLayout>
 
-                <LinearLayout
+                <androidx.appcompat.widget.LinearLayoutCompat
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
                     android:layout_below="@+id/top_banner"
@@ -99,17 +95,16 @@
                     android:paddingTop="8dp"
                     app:layout_scrollFlags="scroll|enterAlways">
 
-                    <TextView
+                    <androidx.appcompat.widget.AppCompatTextView
                         android:id="@+id/account_note"
                         android:layout_width="match_parent"
                         android:layout_height="wrap_content"
                         android:layout_marginTop="5dp"
                         android:gravity="center"
                         android:padding="10dp"
-                        android:textColor="@android:color/white"
                         android:textIsSelectable="true"
                         android:visibility="gone" />
-                </LinearLayout>
+                </androidx.appcompat.widget.LinearLayoutCompat>
             </RelativeLayout>
         </com.google.android.material.appbar.CollapsingToolbarLayout>
 
@@ -118,9 +113,7 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             app:tabGravity="fill"
-            app:tabMode="fixed"
-            app:tabSelectedTextColor="?colorAccent"
-            app:tabTextColor="@android:color/white" />
+            app:tabMode="fixed" />
     </com.google.android.material.appbar.AppBarLayout>
 
     <androidx.viewpager.widget.ViewPager