Use Material components in layout XMLs

app/src/main/java/com/d4rk/androidtutorials/java/ui/screens/android/AndroidStudioFragment.java

@@ -13,11 +13,10 @@
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
-import android.widget.ImageView;
-import android.widget.TextView;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.appcompat.widget.AppCompatImageView;
 import androidx.appcompat.widget.SearchView;
 import androidx.core.view.MenuHost;
 import androidx.core.view.MenuProvider;
@@ -30,10 +29,14 @@
 import com.d4rk.androidtutorials.java.R;
 import com.d4rk.androidtutorials.java.ads.views.NativeAdBannerView;
 import com.d4rk.androidtutorials.java.utils.ConsentUtils;
+import com.d4rk.androidtutorials.java.databinding.FragmentAndroidStudioBinding;
+import com.d4rk.androidtutorials.java.databinding.ItemAndroidStudioCategoryBinding;
+import com.d4rk.androidtutorials.java.databinding.ItemAndroidStudioLessonBinding;
 import com.google.android.gms.ads.AdListener;
 import com.google.android.gms.ads.LoadAdError;
 import com.google.android.gms.ads.MobileAds;
 import com.google.android.material.card.MaterialCardView;
+import com.google.android.material.textview.MaterialTextView;
 import com.google.android.material.shape.CornerFamily;
 import com.google.android.material.shape.ShapeAppearanceModel;
 
@@ -55,12 +58,14 @@ public class AndroidStudioFragment extends Fragment {
     private final List<Object> allItems = new ArrayList<>();
     private LessonsAdapter adapter;
     private boolean showAds;
+    private FragmentAndroidStudioBinding binding;
 
     @Nullable
     @Override
     public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container,
                              @Nullable Bundle savedInstanceState) {
-        return inflater.inflate(R.layout.fragment_android_studio, container, false);
+        binding = FragmentAndroidStudioBinding.inflate(inflater, container, false);
+        return binding.getRoot();
     }
 
     @Override
@@ -70,7 +75,7 @@ public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceStat
         if (showAds) {
             ensureMobileAdsInitialized();
         }
-        RecyclerView list = view.findViewById(R.id.lessons_list);
+        RecyclerView list = binding.lessonsList;
         list.setLayoutManager(new LinearLayoutManager(requireContext()));
         adapter = new LessonsAdapter();
         list.setAdapter(adapter);
@@ -125,6 +130,12 @@ public boolean onMenuItemSelected(@NonNull MenuItem menuItem) {
         }, getViewLifecycleOwner(), Lifecycle.State.RESUMED);
     }
 
+    @Override
+    public void onDestroyView() {
+        super.onDestroyView();
+        binding = null;
+    }
+
     private void ensureMobileAdsInitialized() {
         if (!mobileAdsInitialized) {
             MobileAds.initialize(requireContext());
@@ -351,13 +362,13 @@ public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int
                 adView.setNativeAdLayout(R.layout.ad_android_studio_list);
                 return new AdHolder(adView);
             } else if (viewType == TYPE_CATEGORY) {
-                View view = LayoutInflater.from(parent.getContext())
-                        .inflate(R.layout.item_android_studio_category, parent, false);
-                return new CategoryHolder(view);
+                ItemAndroidStudioCategoryBinding binding = ItemAndroidStudioCategoryBinding.inflate(
+                        LayoutInflater.from(parent.getContext()), parent, false);
+                return new CategoryHolder(binding);
             } else {
-                View view = LayoutInflater.from(parent.getContext())
-                        .inflate(R.layout.item_android_studio_lesson, parent, false);
-                return new LessonHolder(view);
+                ItemAndroidStudioLessonBinding binding = ItemAndroidStudioLessonBinding.inflate(
+                        LayoutInflater.from(parent.getContext()), parent, false);
+                return new LessonHolder(binding);
             }
         }
 
@@ -401,16 +412,16 @@ static class AdHolder extends RecyclerView.ViewHolder {
 
         static class LessonHolder extends RecyclerView.ViewHolder {
             final MaterialCardView card;
-            final ImageView icon;
-            final TextView title;
-            final TextView summary;
-
-            LessonHolder(@NonNull View itemView) {
-                super(itemView);
-                card = (MaterialCardView) itemView;
-                icon = itemView.findViewById(R.id.lesson_icon);
-                title = itemView.findViewById(R.id.lesson_title);
-                summary = itemView.findViewById(R.id.lesson_summary);
+            final AppCompatImageView icon;
+            final MaterialTextView title;
+            final MaterialTextView summary;
+
+            LessonHolder(@NonNull ItemAndroidStudioLessonBinding binding) {
+                super(binding.getRoot());
+                card = binding.lessonCard;
+                icon = binding.lessonIcon;
+                title = binding.lessonTitle;
+                summary = binding.lessonSummary;
             }
 
             void bind(Lesson lesson, boolean first, boolean last) {
@@ -450,21 +461,18 @@ private void applyCorners(boolean first, boolean last) {
         }
 
         static class CategoryHolder extends RecyclerView.ViewHolder {
-            final ImageView icon;
-            final TextView title;
+            final MaterialTextView title;
 
-            CategoryHolder(@NonNull View itemView) {
-                super(itemView);
-                icon = itemView.findViewById(R.id.category_icon);
-                title = itemView.findViewById(R.id.category_title);
+            CategoryHolder(@NonNull ItemAndroidStudioCategoryBinding binding) {
+                super(binding.getRoot());
+                title = binding.categoryTitle;
             }
 
             void bind(Category category) {
                 if (category.iconRes != 0) {
-                    icon.setImageResource(category.iconRes);
-                    icon.setVisibility(View.VISIBLE);
+                    title.setCompoundDrawablesRelativeWithIntrinsicBounds(category.iconRes, 0, 0, 0);
                 } else {
-                    icon.setVisibility(View.GONE);
+                    title.setCompoundDrawablesRelativeWithIntrinsicBounds(0, 0, 0, 0);
                 }
                 title.setText(category.title);
             }

app/src/main/java/com/d4rk/androidtutorials/java/ui/screens/android/lessons/basics/shortcuts/tabs/NavigationAndSearchingShortcutsActivity.java

@@ -1,27 +1,108 @@
 package com.d4rk.androidtutorials.java.ui.screens.android.lessons.basics.shortcuts.tabs;
 
 import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
 
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.d4rk.androidtutorials.java.R;
 import com.d4rk.androidtutorials.java.databinding.ActivityShortcutsNavigationAndSearchingBinding;
 import com.d4rk.androidtutorials.java.ui.components.navigation.UpNavigationActivity;
 import com.d4rk.androidtutorials.java.utils.EdgeToEdgeDelegate;
 import com.google.android.gms.ads.AdRequest;
 import com.google.android.gms.ads.MobileAds;
 
+import java.util.List;
+
 import me.zhanghai.android.fastscroll.FastScrollerBuilder;
 
 public class NavigationAndSearchingShortcutsActivity extends UpNavigationActivity {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        com.d4rk.androidtutorials.java.databinding.ActivityShortcutsNavigationAndSearchingBinding binding = ActivityShortcutsNavigationAndSearchingBinding.inflate(getLayoutInflater());
+        ActivityShortcutsNavigationAndSearchingBinding binding = ActivityShortcutsNavigationAndSearchingBinding.inflate(getLayoutInflater());
         setContentView(binding.getRoot());
         MobileAds.initialize(this);
 
         EdgeToEdgeDelegate edgeToEdgeDelegate = new EdgeToEdgeDelegate(this);
-        edgeToEdgeDelegate.applyEdgeToEdge(binding.scrollView);
+        edgeToEdgeDelegate.applyEdgeToEdge(binding.shortcutList);
 
         binding.adView.loadAd(new AdRequest.Builder().build());
-        new FastScrollerBuilder(binding.scrollView).useMd2Style().build();
+        new FastScrollerBuilder(binding.shortcutList).useMd2Style().build();
+
+        List<Shortcut> shortcuts = List.of(
+                new Shortcut(getString(R.string.press_shift_twice), getString(R.string.search_everything)),
+                new Shortcut("Ctrl + F", getString(R.string.find)),
+                new Shortcut("F3", getString(R.string.find_next)),
+                new Shortcut("Shift + F3", getString(R.string.find_previous)),
+                new Shortcut("Ctrl + R", getString(R.string.replace)),
+                new Shortcut("Ctrl + Shift + A", getString(R.string.find_action)),
+                new Shortcut("Ctrl + Alt + Shift + N", getString(R.string.search_by_symbol_name)),
+                new Shortcut("Ctrl + N", getString(R.string.find_class)),
+                new Shortcut("Ctrl + Shift + N", getString(R.string.find_file)),
+                new Shortcut("Ctrl + Shift + F", getString(R.string.find_path)),
+                new Shortcut("Ctrl + F12", getString(R.string.open_file_structure)),
+                new Shortcut("Alt + Right/Left Arrow", getString(R.string.navigate_between_open_tabs)),
+                new Shortcut("F4/Ctrl +Enter", getString(R.string.jump_to_source)),
+                new Shortcut("Shift + F4", getString(R.string.open_current_editor_tab_in_new_window)),
+                new Shortcut("Ctrl + E", getString(R.string.recently_opened_files)),
+                new Shortcut("Ctrl + Shift + E", getString(R.string.recently_edited_files)),
+                new Shortcut("Ctrl + Shift + Backspace", getString(R.string.go_to_last_edit_location)),
+                new Shortcut("Ctrl + F4", getString(R.string.close_active_editor_tabs)),
+                new Shortcut("Esc", getString(R.string.return_to_editor_window)),
+                new Shortcut("Shift + Esc", getString(R.string.hide_active_window)),
+                new Shortcut("Ctrl + G", getString(R.string.go_to_line)),
+                new Shortcut("Ctrl + H", getString(R.string.open_type_hierarchy)),
+                new Shortcut("Ctrl + Shift + H", getString(R.string.open_v_hierarchy)),
+                new Shortcut("Ctrl + Alt + H", getString(R.string.open_call_hierarchy))
+        );
+
+        binding.shortcutList.setLayoutManager(new LinearLayoutManager(this));
+        binding.shortcutList.setAdapter(new ShortcutsAdapter(shortcuts));
     }
+
+    private static class ShortcutsAdapter extends RecyclerView.Adapter<ShortcutsAdapter.ShortcutHolder> {
+        private final List<Shortcut> items;
+
+        ShortcutsAdapter(List<Shortcut> items) {
+            this.items = items;
+        }
+
+        @NonNull
+        @Override
+        public ShortcutHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+            View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_shortcut, parent, false);
+            return new ShortcutHolder(view);
+        }
+
+        @Override
+        public void onBindViewHolder(@NonNull ShortcutHolder holder, int position) {
+            Shortcut item = items.get(position);
+            holder.key.setText(item.key);
+            holder.description.setText(item.description);
+        }
+
+        @Override
+        public int getItemCount() {
+            return items.size();
+        }
+
+        static class ShortcutHolder extends RecyclerView.ViewHolder {
+            final TextView key;
+            final TextView description;
+
+            ShortcutHolder(@NonNull View itemView) {
+                super(itemView);
+                key = itemView.findViewById(R.id.shortcut_key);
+                description = itemView.findViewById(R.id.shortcut_description);
+            }
+        }
+    }
+
+    private record Shortcut(String key, String description) { }
 }

app/src/main/java/com/d4rk/androidtutorials/java/ui/screens/android/lessons/data/room/Note.java

@@ -10,7 +10,7 @@
 public class Note {
     @PrimaryKey(autoGenerate = true)
     public int id;
-    public String text; // FIXME: Declaration can have final modifier
+    public final String text;
 
     public Note(String text) {
         this.text = text;

app/src/main/java/com/d4rk/androidtutorials/java/ui/screens/onboarding/BottomLabelsFragment.java

@@ -20,7 +20,6 @@ public class BottomLabelsFragment extends Fragment {
     private FragmentOnboardingBottomLabelsBinding binding;
     private OnboardingViewModel viewModel;
     private MaterialRadioButton[] radioButtons;
-    private View[] optionCards; // FIXME: Field can be converted to a local variable
 
     @Nullable
     @Override
@@ -40,7 +39,7 @@ public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceStat
                 binding.optionUnlabeled.radioButton
         };
 
-        optionCards = new View[]{
+        View[] optionCards = new View[]{
                 binding.cardLabeled,
                 binding.cardSelected,
                 binding.cardUnlabeled

app/src/main/java/com/d4rk/androidtutorials/java/ui/screens/onboarding/FontFragment.java

@@ -21,7 +21,6 @@ public class FontFragment extends Fragment {
     private FragmentOnboardingFontBinding binding;
     private OnboardingViewModel viewModel;
     private MaterialRadioButton[] radioButtons;
-    private View[] optionCards; // FIXME: Field can be converted to a local variable
 
     @Nullable
     @Override
@@ -45,7 +44,7 @@ public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceStat
                 binding.optionGoogleSansCode.radioButton
         };
 
-        optionCards = new View[]{
+        View[] optionCards = new View[]{
                 binding.cardAudiowide,
                 binding.cardFiraCode,
                 binding.cardJetbrainsMono,

app/src/main/java/com/d4rk/androidtutorials/java/ui/screens/onboarding/OnboardingActivity.java

@@ -81,8 +81,9 @@ public void onPageSelected(int position) {
 
         new TabLayoutMediator(binding.tabIndicator, binding.viewPager, (tab, position) -> {
             ImageView dot = new ImageView(this);
-            dot.setImageResource(R.drawable.onboarding_dot_unselected);
-            int margin = dpToPx(2);
+              dot.setImageResource(R.drawable.onboarding_dot_unselected);
+              int margin = Math.round(TypedValue.applyDimension(
+                      TypedValue.COMPLEX_UNIT_DIP, 2, getResources().getDisplayMetrics()));
             LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                     LinearLayout.LayoutParams.WRAP_CONTENT,
                     LinearLayout.LayoutParams.WRAP_CONTENT);
@@ -173,10 +174,7 @@ private void updateButtons(int position) {
         }
     }
 
-    private int dpToPx(int dp) { //  FIXME: Value of parameter 'dp' is always '2'
-        return Math.round(TypedValue.applyDimension(
-                TypedValue.COMPLEX_UNIT_DIP, dp, getResources().getDisplayMetrics()));
-    }
+
 
     private static class OnboardingPagerAdapter extends FragmentStateAdapter {
 

app/src/main/res/layout/activity_onboarding.xml

@@ -26,7 +26,7 @@
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@id/buttonSkip" />
 
-    <LinearLayout
+    <androidx.appcompat.widget.LinearLayoutCompat
         android:id="@+id/bottomBar"
         android:layout_width="0dp"
         android:layout_height="wrap_content"
@@ -71,6 +71,6 @@
             app:icon="@drawable/ic_arrow_forward"
             app:iconGravity="textEnd" />
 
-    </LinearLayout>
+    </androidx.appcompat.widget.LinearLayoutCompat>
 
 </androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/activity_settings.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.appcompat.widget.LinearLayoutCompat xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/container"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
@@ -9,4 +9,4 @@
         android:id="@+id/settings"
         android:layout_width="match_parent"
         android:layout_height="match_parent" />
-</LinearLayout>
+</androidx.appcompat.widget.LinearLayoutCompat>