Make navigation bar and status bar transparent to display posts, comments, subreddits and users under them. Minor UI tweaks for bottom sheet fragments.

app/src/main/java/ml/docilealligator/infinityforreddit/AppBarStateChangeListener.java

@@ -0,0 +1,41 @@
+package ml.docilealligator.infinityforreddit;
+
+import com.google.android.material.appbar.AppBarLayout;
+
+abstract class AppBarStateChangeListener implements AppBarLayout.OnOffsetChangedListener {
+    // State
+    public enum State {
+        EXPANDED,
+        COLLAPSED,
+        IDLE
+    }
+
+    private AppBarStateChangeListener.State mCurrentState = AppBarStateChangeListener.State.IDLE;
+
+    @Override
+    public final void onOffsetChanged(AppBarLayout appBarLayout, int i) {
+        if (i == 0) {
+            if (mCurrentState != AppBarStateChangeListener.State.EXPANDED) {
+                onStateChanged(appBarLayout, AppBarStateChangeListener.State.EXPANDED);
+            }
+            mCurrentState = AppBarStateChangeListener.State.EXPANDED;
+        } else if (Math.abs(i) >= appBarLayout.getTotalScrollRange()) {
+            if (mCurrentState != AppBarStateChangeListener.State.COLLAPSED) {
+                onStateChanged(appBarLayout, AppBarStateChangeListener.State.COLLAPSED);
+            }
+            mCurrentState = AppBarStateChangeListener.State.COLLAPSED;
+        } else {
+            if (mCurrentState != AppBarStateChangeListener.State.IDLE) {
+                onStateChanged(appBarLayout, AppBarStateChangeListener.State.IDLE);
+            }
+            mCurrentState = AppBarStateChangeListener.State.IDLE;
+        }
+    }
+
+    /**
+     * Notifies on state change
+     * @param appBarLayout Layout
+     * @param state Collapse state
+     */
+    abstract void onStateChanged(AppBarLayout appBarLayout, AppBarStateChangeListener.State state);
+}

app/src/main/java/ml/docilealligator/infinityforreddit/CommentsListingFragment.java

@@ -3,6 +3,9 @@ package ml.docilealligator.infinityforreddit;
 
 import android.app.Activity;
 import android.content.Context;
+import android.content.res.Configuration;
+import android.content.res.Resources;
+import android.os.Build;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -76,6 +79,17 @@ public class CommentsListingFragment extends Fragment implements FragmentCommuni
 
         mGlide = Glide.with(activity);
 
+        Resources resources = getResources();
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O_MR1) {
+            if (resources.getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT || resources.getBoolean(R.bool.isTablet)) {
+                int navBarResourceId = resources.getIdentifier("navigation_bar_height", "dimen", "android");
+                if (navBarResourceId > 0) {
+                    mCommentRecyclerView.setPadding(0, 0, 0, resources.getDimensionPixelSize(navBarResourceId));
+                }
+            }
+        }
+
         mCommentRecyclerView.setLayoutManager(new LinearLayoutManager(activity));
 
         mAdapter = new CommentsListingRecyclerViewAdapter(activity, mOauthRetrofit,
@@ -85,7 +99,7 @@ public class CommentsListingFragment extends Fragment implements FragmentCommuni
 
         mCommentRecyclerView.setAdapter(mAdapter);
 
-        CommentViewModel.Factory factory = new CommentViewModel.Factory(mRetrofit, getResources().getConfiguration().locale, username);
+        CommentViewModel.Factory factory = new CommentViewModel.Factory(mRetrofit, resources.getConfiguration().locale, username);
         mCommentViewModel = ViewModelProviders.of(this, factory).get(CommentViewModel.class);
         mCommentViewModel.getComments().observe(this, comments -> mAdapter.submitList(comments));
 

app/src/main/java/ml/docilealligator/infinityforreddit/FlairBottomSheetFragment.java

@@ -2,6 +2,8 @@ package ml.docilealligator.infinityforreddit;
 
 
 import android.app.Activity;
+import android.content.res.Configuration;
+import android.os.Build;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -67,6 +69,11 @@ public class FlairBottomSheetFragment extends BottomSheetDialogFragment {
 
         ((Infinity) mAcitivity.getApplication()).getAppComponent().inject(this);
 
+        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O
+                && (getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK) != Configuration.UI_MODE_NIGHT_YES) {
+            rootView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
+        }
+
         mAdapter = new FlairBottomSheetRecyclerViewAdapter(flair -> ((FlairSelectionCallback) mAcitivity).flairSelected(flair));
         recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
         recyclerView.setAdapter(mAdapter);

app/src/main/java/ml/docilealligator/infinityforreddit/FollowedUsersListingFragment.java

@@ -2,6 +2,9 @@ package ml.docilealligator.infinityforreddit;
 
 
 import android.app.Activity;
+import android.content.res.Configuration;
+import android.content.res.Resources;
+import android.os.Build;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -59,6 +62,17 @@ public class FollowedUsersListingFragment extends Fragment {
 
         ((Infinity) mActivity.getApplication()).getAppComponent().inject(this);
 
+        Resources resources = getResources();
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O_MR1) {
+            if (resources.getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT || resources.getBoolean(R.bool.isTablet)) {
+                int navBarResourceId = resources.getIdentifier("navigation_bar_height", "dimen", "android");
+                if (navBarResourceId > 0) {
+                    mRecyclerView.setPadding(0, 0, 0, resources.getDimensionPixelSize(navBarResourceId));
+                }
+            }
+        }
+
         mGlide = Glide.with(this);
 
         mRecyclerView.setLayoutManager(new LinearLayoutManager(mActivity));

app/src/main/java/ml/docilealligator/infinityforreddit/MainActivity.java

@@ -2,11 +2,16 @@ package ml.docilealligator.infinityforreddit;
 
 import android.app.Activity;
 import android.content.Intent;
+import android.content.res.Configuration;
+import android.content.res.Resources;
+import android.os.Build;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
+import android.view.Window;
+import android.view.WindowManager;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.TextView;
@@ -15,6 +20,7 @@ import androidx.annotation.NonNull;
 import androidx.appcompat.app.ActionBarDrawerToggle;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.widget.Toolbar;
+import androidx.coordinatorlayout.widget.CoordinatorLayout;
 import androidx.core.view.GravityCompat;
 import androidx.drawerlayout.widget.DrawerLayout;
 import androidx.fragment.app.Fragment;
@@ -62,6 +68,8 @@ public class MainActivity extends AppCompatActivity implements SortTypeBottomShe
     private static final int LOGIN_ACTIVITY_REQUEST_CODE = 0;
 
     @BindView(R.id.drawer_layout) DrawerLayout drawer;
+    @BindView(R.id.coordinator_layout_main_activity) CoordinatorLayout coordinatorLayout;
+    @BindView(R.id.appbar_layout_main_activity) AppBarLayout appBarLayout;
     @BindView(R.id.view_pager_main_activity) ViewPager viewPager;
     @BindView(R.id.collapsing_toolbar_layout_main_activity) CollapsingToolbarLayout collapsingToolbarLayout;
     @BindView(R.id.toolbar) Toolbar toolbar;
@@ -119,6 +127,41 @@ public class MainActivity extends AppCompatActivity implements SortTypeBottomShe
 
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O_MR1) {
+            Resources resources = getResources();
+
+            if(resources.getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT || resources.getBoolean(R.bool.isTablet)) {
+                Window window = getWindow();
+                window.setFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS, WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
+
+                View decorView = window.getDecorView();
+                appBarLayout.addOnOffsetChangedListener(new AppBarStateChangeListener() {
+                    @Override
+                    void onStateChanged(AppBarLayout appBarLayout, State state) {
+                        if(state == State.COLLAPSED) {
+                            decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR | View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
+                        } else if(state == State.EXPANDED) {
+                            decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
+                        }
+                    }
+                });
+
+                int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
+                if (statusBarResourceId > 0) {
+                    ViewGroup.MarginLayoutParams params = (ViewGroup.MarginLayoutParams) toolbar.getLayoutParams();
+                    params.topMargin = getResources().getDimensionPixelSize(statusBarResourceId);
+                    toolbar.setLayoutParams(params);
+                }
+
+                int navBarResourceId = resources.getIdentifier("navigation_bar_height", "dimen", "android");
+                if (navBarResourceId > 0) {
+                    CoordinatorLayout.LayoutParams params = (CoordinatorLayout.LayoutParams) fab.getLayoutParams();
+                    params.bottomMargin = resources.getDimensionPixelSize(navBarResourceId);
+                    fab.setLayoutParams(params);
+                }
+            }
+        }
+
         postTypeBottomSheetFragment = new PostTypeBottomSheetFragment();
 
         bestSortTypeBottomSheetFragment = new SortTypeBottomSheetFragment();
@@ -390,10 +433,9 @@ public class MainActivity extends AppCompatActivity implements SortTypeBottomShe
     @Override
     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
         if(requestCode == LOGIN_ACTIVITY_REQUEST_CODE && resultCode == Activity.RESULT_OK) {
-            Intent intent = getIntent();
+            Intent intent = new Intent(this, MainActivity.class);
-            finish();
             startActivity(intent);
-            overridePendingTransition(0, 0);
+            finish();
         }
 
         super.onActivityResult(requestCode, resultCode, data);

app/src/main/java/ml/docilealligator/infinityforreddit/PostFragment.java

@@ -4,6 +4,9 @@ package ml.docilealligator.infinityforreddit;
 import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
+import android.content.res.Configuration;
+import android.content.res.Resources;
+import android.os.Build;
 import android.os.Bundle;
 import android.os.CountDownTimer;
 import android.os.Handler;
@@ -125,6 +128,17 @@ public class PostFragment extends Fragment implements FragmentCommunicator {
 
         window = activity.getWindow();
 
+        Resources resources = getResources();
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O_MR1) {
+            if (resources.getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT || resources.getBoolean(R.bool.isTablet)) {
+                int navBarResourceId = resources.getIdentifier("navigation_bar_height", "dimen", "android");
+                if (navBarResourceId > 0) {
+                    mPostRecyclerView.setPadding(0, 0, 0, resources.getDimensionPixelSize(navBarResourceId));
+                }
+            }
+        }
+
         mGlide = Glide.with(activity);
 
         lazyModeRunnable = new Runnable() {

app/src/main/java/ml/docilealligator/infinityforreddit/PostTypeBottomSheetFragment.java

@@ -2,6 +2,8 @@ package ml.docilealligator.infinityforreddit;
 
 
 import android.app.Activity;
+import android.content.res.Configuration;
+import android.os.Build;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -48,6 +50,11 @@ public class PostTypeBottomSheetFragment extends RoundedBottomSheetDialogFragmen
 
         Activity activity = getActivity();
 
+        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O
+                && (getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK) != Configuration.UI_MODE_NIGHT_YES) {
+            rootView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
+        }
+
         textTypeLinearLayout.setOnClickListener(view -> {
             ((PostTypeSelectionCallback) activity).postTypeSelected(TYPE_TEXT);
             dismiss();

app/src/main/java/ml/docilealligator/infinityforreddit/SearchPostSortTypeBottomSheetFragment.java

@@ -2,6 +2,8 @@ package ml.docilealligator.infinityforreddit;
 
 
 import android.app.Activity;
+import android.content.res.Configuration;
+import android.os.Build;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -44,6 +46,11 @@ public class SearchPostSortTypeBottomSheetFragment extends RoundedBottomSheetDia
 
         Activity activity = getActivity();
 
+        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O
+                && (getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK) != Configuration.UI_MODE_NIGHT_YES) {
+            rootView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
+        }
+
         relevanceTypeTextView.setOnClickListener(view -> {
             ((SearchSortTypeSelectionCallback) activity).searchSortTypeSelected(PostDataSource.SORT_TYPE_RELEVANCE);
             dismiss();

app/src/main/java/ml/docilealligator/infinityforreddit/SearchResultActivity.java

@@ -1,10 +1,16 @@
 package ml.docilealligator.infinityforreddit;
 
 import android.content.Intent;
+import android.content.res.Configuration;
+import android.content.res.Resources;
+import android.os.Build;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
+import android.view.View;
 import android.view.ViewGroup;
+import android.view.Window;
+import android.view.WindowManager;
 
 import androidx.annotation.NonNull;
 import androidx.appcompat.app.AppCompatActivity;
@@ -14,6 +20,7 @@ import androidx.fragment.app.FragmentManager;
 import androidx.fragment.app.FragmentPagerAdapter;
 import androidx.viewpager.widget.ViewPager;
 
+import com.google.android.material.appbar.AppBarLayout;
 import com.google.android.material.tabs.TabLayout;
 
 import javax.inject.Inject;
@@ -36,6 +43,7 @@ public class SearchResultActivity extends AppCompatActivity implements SearchPos
     private String mQuery;
     private String mSubredditName;
 
+    @BindView(R.id.appbar_search_result_activity) AppBarLayout appBarLayout;
     @BindView(R.id.toolbar_search_result_activity) Toolbar toolbar;
     @BindView(R.id.tab_layout_search_result_activity) TabLayout tabLayout;
     @BindView(R.id.view_pager_search_result_activity) ViewPager viewPager;
@@ -57,6 +65,34 @@ public class SearchResultActivity extends AppCompatActivity implements SearchPos
 
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O_MR1) {
+            Resources resources = getResources();
+
+            if(resources.getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT || resources.getBoolean(R.bool.isTablet)) {
+                Window window = getWindow();
+                window.setFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS, WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
+
+                View decorView = window.getDecorView();
+                appBarLayout.addOnOffsetChangedListener(new AppBarStateChangeListener() {
+                    @Override
+                    void onStateChanged(AppBarLayout appBarLayout, State state) {
+                        if(state == State.COLLAPSED) {
+                            decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR | View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
+                        } else if(state == State.EXPANDED) {
+                            decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
+                        }
+                    }
+                });
+
+                int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
+                if (statusBarResourceId > 0) {
+                    ViewGroup.MarginLayoutParams params = (ViewGroup.MarginLayoutParams) toolbar.getLayoutParams();
+                    params.topMargin = getResources().getDimensionPixelSize(statusBarResourceId);
+                    toolbar.setLayoutParams(params);
+                }
+            }
+        }
+
         setSupportActionBar(toolbar);
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 

app/src/main/java/ml/docilealligator/infinityforreddit/SearchUserAndSubredditSortTypeBottomSheetFragment.java

@@ -2,6 +2,8 @@ package ml.docilealligator.infinityforreddit;
 
 
 import android.app.Activity;
+import android.content.res.Configuration;
+import android.os.Build;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -43,6 +45,11 @@ public class SearchUserAndSubredditSortTypeBottomSheetFragment extends RoundedBo
 
         Activity activity = getActivity();
 
+        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O
+                && (getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK) != Configuration.UI_MODE_NIGHT_YES) {
+            rootView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
+        }
+
         int position = getArguments().getInt(EXTRA_FRAGMENT_POSITION);
 
         relevanceTypeTextView.setOnClickListener(view -> {

app/src/main/java/ml/docilealligator/infinityforreddit/SortTypeBottomSheetFragment.java

@@ -2,6 +2,8 @@ package ml.docilealligator.infinityforreddit;
 
 
 import android.app.Activity;
+import android.content.res.Configuration;
+import android.os.Build;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -49,6 +51,11 @@ public class SortTypeBottomSheetFragment extends RoundedBottomSheetDialogFragmen
 
         Activity activity = getActivity();
 
+        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O
+                && (getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK) != Configuration.UI_MODE_NIGHT_YES) {
+            rootView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
+        }
+
         if(getArguments().getBoolean(EXTRA_NO_BEST_TYPE)) {
             bestTypeTextView.setVisibility(View.GONE);
         } else {

app/src/main/java/ml/docilealligator/infinityforreddit/SubredditListingFragment.java

@@ -3,6 +3,9 @@ package ml.docilealligator.infinityforreddit;
 
 import android.app.Activity;
 import android.content.Intent;
+import android.content.res.Configuration;
+import android.content.res.Resources;
+import android.os.Build;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -78,6 +81,17 @@ public class SubredditListingFragment extends Fragment implements FragmentCommun
 
         ButterKnife.bind(this, rootView);
 
+        Resources resources = getResources();
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O_MR1) {
+            if (resources.getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT || resources.getBoolean(R.bool.isTablet)) {
+                int navBarResourceId = resources.getIdentifier("navigation_bar_height", "dimen", "android");
+                if (navBarResourceId > 0) {
+                    mSubredditListingRecyclerView.setPadding(0, 0, 0, resources.getDimensionPixelSize(navBarResourceId));
+                }
+            }
+        }
+
         mLinearLayoutManager = new LinearLayoutManager(getActivity());
         mSubredditListingRecyclerView.setLayoutManager(mLinearLayoutManager);
 

app/src/main/java/ml/docilealligator/infinityforreddit/SubscribedSubredditsListingFragment.java

@@ -2,6 +2,9 @@ package ml.docilealligator.infinityforreddit;
 
 
 import android.app.Activity;
+import android.content.res.Configuration;
+import android.content.res.Resources;
+import android.os.Build;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -63,6 +66,17 @@ public class SubscribedSubredditsListingFragment extends Fragment {
 
         ((Infinity) mActivity.getApplication()).getAppComponent().inject(this);
 
+        Resources resources = getResources();
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O_MR1) {
+            if (resources.getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT || resources.getBoolean(R.bool.isTablet)) {
+                int navBarResourceId = resources.getIdentifier("navigation_bar_height", "dimen", "android");
+                if (navBarResourceId > 0) {
+                    mRecyclerView.setPadding(0, 0, 0, resources.getDimensionPixelSize(navBarResourceId));
+                }
+            }
+        }
+
         String accountName = getArguments().getString(EXTRA_ACCOUNT_NAME);
 
         mGlide = Glide.with(this);

app/src/main/java/ml/docilealligator/infinityforreddit/SubscribedThingListingActivity.java

@@ -1,8 +1,14 @@
 package ml.docilealligator.infinityforreddit;
 
+import android.content.res.Configuration;
+import android.content.res.Resources;
+import android.os.Build;
 import android.os.Bundle;
 import android.view.MenuItem;
+import android.view.View;
 import android.view.ViewGroup;
+import android.view.Window;
+import android.view.WindowManager;
 
 import androidx.annotation.NonNull;
 import androidx.appcompat.app.AppCompatActivity;
@@ -12,6 +18,7 @@ import androidx.fragment.app.FragmentManager;
 import androidx.fragment.app.FragmentPagerAdapter;
 import androidx.viewpager.widget.ViewPager;
 
+import com.google.android.material.appbar.AppBarLayout;
 import com.google.android.material.tabs.TabLayout;
 
 import java.util.ArrayList;
@@ -33,6 +40,7 @@ public class SubscribedThingListingActivity extends AppCompatActivity {
     private static final String ACCESS_TOKEN_STATE = "ATS";
     private static final String ACCOUNT_NAME_STATE = "ANS";
 
+    @BindView(R.id.appbar_subscribed_thing_listing_activity) AppBarLayout appBarLayout;
     @BindView(R.id.toolbar_subscribed_thing_listing_activity) Toolbar toolbar;
     @BindView(R.id.tab_layout_subscribed_thing_listing_activity) TabLayout tabLayout;
     @BindView(R.id.view_pager_subscribed_thing_listing_activity) ViewPager viewPager;
@@ -60,6 +68,34 @@ public class SubscribedThingListingActivity extends AppCompatActivity {
 
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O_MR1) {
+            Resources resources = getResources();
+
+            if(resources.getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT || resources.getBoolean(R.bool.isTablet)) {
+                Window window = getWindow();
+                window.setFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS, WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
+
+                View decorView = window.getDecorView();
+                appBarLayout.addOnOffsetChangedListener(new AppBarStateChangeListener() {
+                    @Override
+                    void onStateChanged(AppBarLayout appBarLayout, State state) {
+                        if(state == State.COLLAPSED) {
+                            decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR | View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
+                        } else if(state == State.EXPANDED) {
+                            decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
+                        }
+                    }
+                });
+
+                int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
+                if (statusBarResourceId > 0) {
+                    ViewGroup.MarginLayoutParams params = (ViewGroup.MarginLayoutParams) toolbar.getLayoutParams();
+                    params.topMargin = getResources().getDimensionPixelSize(statusBarResourceId);
+                    toolbar.setLayoutParams(params);
+                }
+            }
+        }
+
         setSupportActionBar(toolbar);
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 

app/src/main/java/ml/docilealligator/infinityforreddit/UserListingFragment.java

@@ -1,6 +1,9 @@
 package ml.docilealligator.infinityforreddit;
 
 
+import android.content.res.Configuration;
+import android.content.res.Resources;
+import android.os.Build;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -74,6 +77,17 @@ public class UserListingFragment extends Fragment implements FragmentCommunicato
 
         ButterKnife.bind(this, rootView);
 
+        Resources resources = getResources();
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O_MR1) {
+            if (resources.getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT || resources.getBoolean(R.bool.isTablet)) {
+                int navBarResourceId = resources.getIdentifier("navigation_bar_height", "dimen", "android");
+                if (navBarResourceId > 0) {
+                    mUserListingRecyclerView.setPadding(0, 0, 0, resources.getDimensionPixelSize(navBarResourceId));
+                }
+            }
+        }
+
         mLinearLayoutManager = new LinearLayoutManager(getActivity());
         mUserListingRecyclerView.setLayoutManager(mLinearLayoutManager);
 

app/src/main/java/ml/docilealligator/infinityforreddit/ViewSubredditDetailActivity.java

@@ -1,12 +1,17 @@
 package ml.docilealligator.infinityforreddit;
 
 import android.content.Intent;
+import android.content.res.Configuration;
+import android.content.res.Resources;
 import android.os.AsyncTask;
+import android.os.Build;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
+import android.view.Window;
+import android.view.WindowManager;
 import android.widget.TextView;
 
 import androidx.annotation.NonNull;
@@ -99,6 +104,41 @@ public class ViewSubredditDetailActivity extends AppCompatActivity implements So
 
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O_MR1) {
+            Resources resources = getResources();
+
+            if(resources.getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT || resources.getBoolean(R.bool.isTablet)) {
+                Window window = getWindow();
+                window.setFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS, WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
+
+                View decorView = window.getDecorView();
+                appBarLayout.addOnOffsetChangedListener(new AppBarStateChangeListener() {
+                    @Override
+                    void onStateChanged(AppBarLayout appBarLayout, State state) {
+                        if (state == State.COLLAPSED) {
+                            decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR | View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
+                        } else if (state == State.EXPANDED) {
+                            decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
+                        }
+                    }
+                });
+
+                int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
+                if (statusBarResourceId > 0) {
+                    ViewGroup.MarginLayoutParams params = (ViewGroup.MarginLayoutParams) toolbar.getLayoutParams();
+                    params.topMargin = getResources().getDimensionPixelSize(statusBarResourceId);
+                    toolbar.setLayoutParams(params);
+                }
+
+                int navBarResourceId = resources.getIdentifier("navigation_bar_height", "dimen", "android");
+                if (navBarResourceId > 0) {
+                    CoordinatorLayout.LayoutParams params = (CoordinatorLayout.LayoutParams) fab.getLayoutParams();
+                    params.bottomMargin = resources.getDimensionPixelSize(navBarResourceId);
+                    fab.setLayoutParams(params);
+                }
+            }
+        }
+
         subredditName = getIntent().getExtras().getString(EXTRA_SUBREDDIT_NAME_KEY);
 
         if(savedInstanceState == null) {

app/src/main/java/ml/docilealligator/infinityforreddit/ViewUserDetailActivity.java

@@ -1,12 +1,17 @@
 package ml.docilealligator.infinityforreddit;
 
 import android.content.Intent;
+import android.content.res.Configuration;
+import android.content.res.Resources;
 import android.os.AsyncTask;
+import android.os.Build;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
+import android.view.Window;
+import android.view.WindowManager;
 import android.widget.TextView;
 
 import androidx.annotation.NonNull;
@@ -51,16 +56,26 @@ public class ViewUserDetailActivity extends AppCompatActivity {
     private static final String ACCOUNT_NAME_STATE = "ANS";
     private static final String IS_IN_LAZY_MODE_STATE = "IILMS";
 
-    @BindView(R.id.coordinator_layout_view_user_detail_activity) CoordinatorLayout coordinatorLayout;
+    @BindView(R.id.coordinator_layout_view_user_detail_activity)
-    @BindView(R.id.view_pager_view_user_detail_activity) ViewPager viewPager;
+    CoordinatorLayout coordinatorLayout;
-    @BindView(R.id.appbar_layout_view_user_detail) AppBarLayout appBarLayout;
+    @BindView(R.id.view_pager_view_user_detail_activity)
-    @BindView(R.id.tab_layout_view_user_detail_activity) TabLayout tabLayout;
+    ViewPager viewPager;
-    @BindView(R.id.collapsing_toolbar_layout_view_user_detail_activity) CollapsingToolbarLayout collapsingToolbarLayout;
+    @BindView(R.id.appbar_layout_view_user_detail)
-    @BindView(R.id.banner_image_view_view_user_detail_activity) GifImageView bannerImageView;
+    AppBarLayout appBarLayout;
-    @BindView(R.id.icon_gif_image_view_view_user_detail_activity) GifImageView iconGifImageView;
+    @BindView(R.id.tab_layout_view_user_detail_activity)
-    @BindView(R.id.user_name_text_view_view_user_detail_activity) TextView userNameTextView;
+    TabLayout tabLayout;
-    @BindView(R.id.subscribe_user_chip_view_user_detail_activity) Chip subscribeUserChip;
+    @BindView(R.id.collapsing_toolbar_layout_view_user_detail_activity)
-    @BindView(R.id.karma_text_view_view_user_detail_activity) TextView karmaTextView;
+    CollapsingToolbarLayout collapsingToolbarLayout;
+    @BindView(R.id.banner_image_view_view_user_detail_activity)
+    GifImageView bannerImageView;
+    @BindView(R.id.icon_gif_image_view_view_user_detail_activity)
+    GifImageView iconGifImageView;
+    @BindView(R.id.user_name_text_view_view_user_detail_activity)
+    TextView userNameTextView;
+    @BindView(R.id.subscribe_user_chip_view_user_detail_activity)
+    Chip subscribeUserChip;
+    @BindView(R.id.karma_text_view_view_user_detail_activity)
+    TextView karmaTextView;
 
     private SectionsPagerAdapter sectionsPagerAdapter;
 
@@ -140,8 +155,8 @@ public class ViewUserDetailActivity extends AppCompatActivity {
         toolbar.setTitle(title);
         setSupportActionBar(toolbar);
 
-        ViewGroup.MarginLayoutParams params = (ViewGroup.MarginLayoutParams) toolbar.getLayoutParams();
+        ViewGroup.MarginLayoutParams toolbarLayoutParams = (ViewGroup.MarginLayoutParams) toolbar.getLayoutParams();
-        params.topMargin = statusBarHeight;
+        toolbarLayoutParams.topMargin = statusBarHeight;
 
         expandedTabTextColor = getResources().getColor(R.color.tabLayoutWithExpandedCollapsingToolbarTextColor);
         expandedTabBackgroundColor = getResources().getColor(R.color.tabLayoutWithExpandedCollapsingToolbarTabBackground);
@@ -151,6 +166,39 @@ public class ViewUserDetailActivity extends AppCompatActivity {
         collapsedTabBackgroundColor = getResources().getColor(R.color.tabLayoutWithCollapsedCollapsingToolbarTabBackground);
         collapsedTabIndicatorColor = getResources().getColor(R.color.tabLayoutWithCollapsedCollapsingToolbarTabIndicator);
 
+        Resources resources = getResources();
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O_MR1
+                && (resources.getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT
+                || resources.getBoolean(R.bool.isTablet))) {
+            Window window = getWindow();
+            window.setFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS, WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
+
+            View decorView = window.getDecorView();
+            appBarLayout.addOnOffsetChangedListener(new AppBarStateChangeListener() {
+                @Override
+                void onStateChanged(AppBarLayout appBarLayout, State state) {
+                    if (state == State.COLLAPSED) {
+                        decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR | View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
+                        tabLayout.setTabTextColors(collapsedTabTextColor, collapsedTabTextColor);
+                        tabLayout.setSelectedTabIndicatorColor(collapsedTabIndicatorColor);
+                        tabLayout.setBackgroundColor(collapsedTabBackgroundColor);
+                    } else if (state == State.EXPANDED) {
+                        decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR);
+                        tabLayout.setTabTextColors(expandedTabTextColor, expandedTabTextColor);
+                        tabLayout.setSelectedTabIndicatorColor(expandedTabIndicatorColor);
+                        tabLayout.setBackgroundColor(expandedTabBackgroundColor);
+                    }
+                }
+            });
+
+            int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
+            if (statusBarResourceId > 0) {
+                ViewGroup.MarginLayoutParams params = (ViewGroup.MarginLayoutParams) toolbar.getLayoutParams();
+                params.topMargin = getResources().getDimensionPixelSize(statusBarResourceId);
+                toolbar.setLayoutParams(params);
+            }
+        } else {
             appBarLayout.addOnOffsetChangedListener(new AppBarStateChangeListener() {
                 @Override
                 void onStateChanged(AppBarLayout appBarLayout, State state) {
@@ -165,6 +213,7 @@ public class ViewUserDetailActivity extends AppCompatActivity {
                     }
                 }
             });
+        }
 
         subscribedUserDao = mRedditDataRoomDatabase.subscribedUserDao();
         glide = Glide.with(this);
@@ -397,44 +446,6 @@ public class ViewUserDetailActivity extends AppCompatActivity {
         }
     }
 
-    public abstract static class AppBarStateChangeListener implements AppBarLayout.OnOffsetChangedListener {
-        // State
-        public enum State {
-            EXPANDED,
-            COLLAPSED,
-            IDLE
-        }
-
-        private State mCurrentState = State.IDLE;
-
-        @Override
-        public final void onOffsetChanged(AppBarLayout appBarLayout, int i) {
-            if (i == 0) {
-                if (mCurrentState != State.EXPANDED) {
-                    onStateChanged(appBarLayout, State.EXPANDED);
-                }
-                mCurrentState = State.EXPANDED;
-            } else if (Math.abs(i) >= appBarLayout.getTotalScrollRange()) {
-                if (mCurrentState != State.COLLAPSED) {
-                    onStateChanged(appBarLayout, State.COLLAPSED);
-                }
-                mCurrentState = State.COLLAPSED;
-            } else {
-                if (mCurrentState != State.IDLE) {
-                    onStateChanged(appBarLayout, State.IDLE);
-                }
-                mCurrentState = State.IDLE;
-            }
-        }
-
-        /**
-         * Notifies on state change
-         * @param appBarLayout Layout
-         * @param state Collapse state
-         */
-        abstract void onStateChanged(AppBarLayout appBarLayout, State state);
-    }
-
     private static class InsertUserDataAsyncTask extends AsyncTask<Void, Void, Void> {
 
         interface InsertUserDataAsyncTaskListener {

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

@@ -11,6 +11,13 @@
         android:layout_height="wrap_content"
         android:theme="@style/AppTheme.AppBarOverlay">
 
+        <com.google.android.material.appbar.CollapsingToolbarLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            app:layout_scrollFlags="scroll|enterAlways"
+            app:titleEnabled="false"
+            app:toolbarId="@+id/toolbar_search_result_activity">
+
             <FrameLayout
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content">
@@ -38,11 +45,14 @@
 
             </FrameLayout>
 
+        </com.google.android.material.appbar.CollapsingToolbarLayout>
+
         <com.google.android.material.tabs.TabLayout
             android:id="@+id/tab_layout_search_result_activity"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:background="@color/colorPrimary"
+            app:layout_scrollFlags="scroll|enterAlways"
             app:tabGravity="fill"
             app:tabMode="fixed"
             app:tabIndicatorColor="@android:color/white"

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

@@ -12,6 +12,13 @@
         android:layout_height="wrap_content"
         android:theme="@style/AppTheme.AppBarOverlay">
 
+        <com.google.android.material.appbar.CollapsingToolbarLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            app:layout_scrollFlags="scroll|enterAlways"
+            app:titleEnabled="false"
+            app:toolbarId="@+id/toolbar_subscribed_thing_listing_activity">
+
             <androidx.appcompat.widget.Toolbar
                 android:id="@+id/toolbar_subscribed_thing_listing_activity"
                 android:layout_width="match_parent"
@@ -19,11 +26,14 @@
                 android:background="?attr/colorPrimary"
                 app:popupTheme="@style/AppTheme.PopupOverlay" />
 
+        </com.google.android.material.appbar.CollapsingToolbarLayout>
+
         <com.google.android.material.tabs.TabLayout
             android:id="@+id/tab_layout_subscribed_thing_listing_activity"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:background="@color/colorPrimary"
+            app:layout_scrollFlags="scroll|enterAlways"
             app:tabGravity="fill"
             app:tabMode="fixed"
             app:tabIndicatorColor="@android:color/white"

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

@@ -4,9 +4,11 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:id="@+id/coordinator_layout_main_activity"
     tools:application="ml.docilealligator.infinityforreddit.MainActivity">
 
     <com.google.android.material.appbar.AppBarLayout
+        android:id="@+id/appbar_layout_main_activity"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:theme="@style/AppTheme.AppBarOverlay">

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

@@ -21,7 +21,8 @@
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/recycler_view_comments_listing_fragment"
         android:layout_width="match_parent"
-        android:layout_height="match_parent" />
+        android:layout_height="match_parent"
+        android:clipToPadding="false" />
 
     <LinearLayout
         android:id="@+id/fetch_comments_info_linear_layout_comments_listing_fragment"

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

@@ -8,7 +8,8 @@
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/recycler_view_followed_users_listing_fragment"
         android:layout_width="match_parent"
-        android:layout_height="match_parent" />
+        android:layout_height="match_parent"
+        android:clipToPadding="false" />
 
     <LinearLayout
         android:id="@+id/no_subscriptions_linear_layout_followed_users_listing_fragment"

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

@@ -20,7 +20,8 @@
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/recycler_view_post_fragment"
         android:layout_width="match_parent"
-        android:layout_height="match_parent" />
+        android:layout_height="match_parent"
+        android:clipToPadding="false" />
 
     <LinearLayout
         android:id="@+id/fetch_post_info_linear_layout_post_fragment"

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

@@ -21,7 +21,8 @@
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/recycler_view_subreddit_listing_fragment"
         android:layout_width="match_parent"
-        android:layout_height="match_parent" />
+        android:layout_height="match_parent"
+        android:clipToPadding="false" />
 
     <LinearLayout
         android:id="@+id/fetch_subreddit_listing_info_linear_layout_subreddit_listing_fragment"

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

@@ -8,7 +8,8 @@
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/recycler_view_subscribed_subreddits_listing_fragment"
         android:layout_width="match_parent"
-        android:layout_height="match_parent" />
+        android:layout_height="match_parent"
+        android:clipToPadding="false" />
 
     <LinearLayout
         android:id="@+id/no_subscriptions_linear_layout_subreddits_listing_fragment"

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

@@ -21,7 +21,8 @@
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/recycler_view_user_listing_fragment"
         android:layout_width="match_parent"
-        android:layout_height="match_parent" />
+        android:layout_height="match_parent"
+        android:clipToPadding="false" />
 
     <LinearLayout
         android:id="@+id/fetch_user_listing_info_linear_layout_user_listing_fragment"

app/src/main/res/values-night/colors.xml

@@ -26,7 +26,7 @@
 
     <color name="roundedBottomSheetPrimaryBackground">#242424</color>
 
-    <color name="roundedBottomSheetPrimaryNavigationBarColor">#000000</color>
+    <color name="roundedBottomSheetPrimaryNavigationBarColor">@color/roundedBottomSheetPrimaryBackground</color>
 
     <color name="voteUnavailableVoteButtonColor">#3C3C3C</color>
 

app/src/main/res/values-sw600dp/attr.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <bool name="isTablet">true</bool>
+</resources>

app/src/main/res/values/attr.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <bool name="isTablet">false</bool>
+</resources>

app/src/main/res/values/colors.xml

@@ -26,7 +26,7 @@
 
     <color name="roundedBottomSheetPrimaryBackground">#FFFFFF</color>
 
-    <color name="roundedBottomSheetPrimaryNavigationBarColor">#000000</color>
+    <color name="roundedBottomSheetPrimaryNavigationBarColor">@color/roundedBottomSheetPrimaryBackground</color>
 
     <color name="voteUnavailableVoteButtonColor">#F0F0F0</color>
 

app/src/main/res/values/styles.xml

@@ -1,4 +1,4 @@
-<resources>
+<resources xmlns:tools="http://schemas.android.com/tools">
 
     <!-- Base application theme. -->
     <style name="AppTheme" parent="Theme.MaterialComponents.DayNight">