Searching subreddits to post is available. Use Toolbar instead of ActionBar in various activities. Minor bugs fixed.

app/src/main/AndroidManifest.xml

@@ -19,6 +19,11 @@
         android:supportsRtl="true"
         android:theme="@style/AppTheme"
         android:usesCleartextTraffic="true">
+        <activity
+            android:name=".SearchSubredditsResultActivity"
+            android:label="@string/search_subreddits_activity_label"
+            android:parentActivityName=".MainActivity"
+            android:theme="@style/AppTheme.NoActionBar" />
         <activity android:name=".LinkResolverActivity">
             <intent-filter>
                 <action android:name="android.intent.action.VIEW" />
@@ -44,17 +49,17 @@
             android:name=".PostVideoActivity"
             android:label="@string/post_video_activity_label"
             android:parentActivityName=".MainActivity"
-            android:windowSoftInputMode="adjustResize" />
+            android:theme="@style/AppTheme.NoActionBar" />
         <activity
             android:name=".PostImageActivity"
             android:label="@string/post_image_activity_label"
             android:parentActivityName=".MainActivity"
-            android:windowSoftInputMode="adjustResize" />
+            android:theme="@style/AppTheme.NoActionBar" />
         <activity
             android:name=".PostLinkActivity"
             android:label="@string/post_link_activity_label"
             android:parentActivityName=".MainActivity"
-            android:windowSoftInputMode="adjustResize" />
+            android:theme="@style/AppTheme.NoActionBar" />
         <activity
             android:name=".SubscribedThingListingActivity"
             android:label="@string/subscriptions"
@@ -63,12 +68,14 @@
         <activity
             android:name=".SubredditSelectionActivity"
             android:label="@string/subreddit_selection_activity_label"
-            android:parentActivityName=".MainActivity" />
+            android:parentActivityName=".MainActivity"
+            android:theme="@style/AppTheme.NoActionBar" />
         <activity
             android:name=".PostTextActivity"
             android:label="@string/post_text_activity_label"
             android:parentActivityName=".MainActivity"
-            android:windowSoftInputMode="adjustResize" />
+            android:windowSoftInputMode="adjustResize"
+            android:theme="@style/AppTheme.NoActionBar" />
         <activity
             android:name=".CommentActivity"
             android:label="@string/comment_activity_label"

app/src/main/java/CustomView/CustomMarkwonView.java

@@ -24,23 +24,24 @@ public class CustomMarkwonView extends MarkwonView {
         super(context, attrs);
     }
 
-    public void setMarkdown(@Nullable String markdown, Context conte) {
+    public void setMarkdown(@Nullable String markdown, Context context) {
-        SpannableConfiguration configuration = SpannableConfiguration.builder(conte).linkResolver((view, link) -> {
+        SpannableConfiguration configuration = SpannableConfiguration.builder(context).linkResolver((view, link) -> {
             if(link.startsWith("/u/") || link.startsWith("u/")) {
-                Intent intent = new Intent(conte, ViewUserDetailActivity.class);
+                Intent intent = new Intent(context, ViewUserDetailActivity.class);
                 intent.putExtra(ViewUserDetailActivity.EXTRA_USER_NAME_KEY, link.substring(3));
-                conte.startActivity(intent);
+                context.startActivity(intent);
             } else if(link.startsWith("/r/") || link.startsWith("r/")) {
-                Intent intent = new Intent(conte, ViewSubredditDetailActivity.class);
+                Intent intent = new Intent(context, ViewSubredditDetailActivity.class);
                 intent.putExtra(ViewSubredditDetailActivity.EXTRA_SUBREDDIT_NAME_KEY, link.substring(3));
-                conte.startActivity(intent);
+                context.startActivity(intent);
             } else {
                 CustomTabsIntent.Builder builder = new CustomTabsIntent.Builder();
                 // add share action to menu list
                 builder.addDefaultShareMenuItem();
-                builder.setToolbarColor(conte.getResources().getColor(R.color.colorPrimary));
+                builder.setToolbarColor(context.getResources().getColor(R.color.colorPrimary));
                 CustomTabsIntent customTabsIntent = builder.build();
-                customTabsIntent.launchUrl(conte, Uri.parse(link));
+                customTabsIntent.intent.setPackage(context.getPackageName());
+                customTabsIntent.launchUrl(context, Uri.parse(link));
             }
         }).build();
 

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

@@ -300,6 +300,7 @@ public class MainActivity extends AppCompatActivity implements SortTypeBottomShe
                 return true;
             case R.id.action_search_main_activity:
                 Intent intent = new Intent(this, SearchActivity.class);
+                intent.putExtra(SearchActivity.EXTRA_SEARCH_ONLY_SUBREDDITS, false);
                 startActivity(intent);
                 return true;
             case R.id.action_refresh_main_activity:

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

@@ -19,8 +19,8 @@ import android.widget.Toast;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
-import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.Toolbar;
 import androidx.constraintlayout.widget.ConstraintLayout;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
 import androidx.core.content.FileProvider;
@@ -69,6 +69,7 @@ public class PostImageActivity extends AppCompatActivity implements FlairBottomS
     private static final int CAPTURE_IMAGE_REQUEST_CODE = 2;
 
     @BindView(R.id.coordinator_layout_post_image_activity) CoordinatorLayout coordinatorLayout;
+    @BindView(R.id.toolbar_post_image_activity) Toolbar toolbar;
     @BindView(R.id.subreddit_icon_gif_image_view_post_image_activity) GifImageView iconGifImageView;
     @BindView(R.id.subreddit_name_text_view_post_image_activity) TextView subreditNameTextView;
     @BindView(R.id.rules_button_post_image_activity) Button rulesButton;
@@ -126,9 +127,8 @@ public class PostImageActivity extends AppCompatActivity implements FlairBottomS
 
         ((Infinity) getApplication()).getmAppComponent().inject(this);
 
-        ActionBar actionBar = getSupportActionBar();
+        setSupportActionBar(toolbar);
-        Drawable upArrow = getResources().getDrawable(R.drawable.ic_arrow_back_white_24dp);
+        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
-        actionBar.setHomeAsUpIndicator(upArrow);
 
         mGlide = Glide.with(this);
         mLocale = getResources().getConfiguration().locale;

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

@@ -2,7 +2,6 @@ package ml.docilealligator.infinityforreddit;
 
 import android.content.Intent;
 import android.content.SharedPreferences;
-import android.graphics.drawable.Drawable;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
@@ -13,8 +12,8 @@ import android.widget.TextView;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
-import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.Toolbar;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
 
 import com.bumptech.glide.Glide;
@@ -51,6 +50,7 @@ public class PostLinkActivity extends AppCompatActivity implements FlairBottomSh
     private static final int SUBREDDIT_SELECTION_REQUEST_CODE = 0;
 
     @BindView(R.id.coordinator_layout_post_link_activity) CoordinatorLayout coordinatorLayout;
+    @BindView(R.id.toolbar_post_link_activity) Toolbar toolbar;
     @BindView(R.id.subreddit_icon_gif_image_view_post_link_activity) GifImageView iconGifImageView;
     @BindView(R.id.subreddit_name_text_view_post_link_activity) TextView subredditNameTextView;
     @BindView(R.id.rules_button_post_link_activity) Button rulesButton;
@@ -95,9 +95,8 @@ public class PostLinkActivity extends AppCompatActivity implements FlairBottomSh
 
         ((Infinity) getApplication()).getmAppComponent().inject(this);
 
-        ActionBar actionBar = getSupportActionBar();
+        setSupportActionBar(toolbar);
-        Drawable upArrow = getResources().getDrawable(R.drawable.ic_arrow_back_white_24dp);
+        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
-        actionBar.setHomeAsUpIndicator(upArrow);
 
         mGlide = Glide.with(this);
         mLocale = getResources().getConfiguration().locale;

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

@@ -2,7 +2,6 @@ package ml.docilealligator.infinityforreddit;
 
 import android.content.Intent;
 import android.content.SharedPreferences;
-import android.graphics.drawable.Drawable;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
@@ -13,8 +12,8 @@ import android.widget.TextView;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
-import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.Toolbar;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
 
 import com.bumptech.glide.Glide;
@@ -51,6 +50,7 @@ public class PostTextActivity extends AppCompatActivity implements FlairBottomSh
     private static final int SUBREDDIT_SELECTION_REQUEST_CODE = 0;
 
     @BindView(R.id.coordinator_layout_post_text_activity) CoordinatorLayout coordinatorLayout;
+    @BindView(R.id.toolbar_post_text_activity) Toolbar toolbar;
     @BindView(R.id.subreddit_icon_gif_image_view_search_activity) GifImageView iconGifImageView;
     @BindView(R.id.subreddit_name_text_view_search_activity) TextView subreditNameTextView;
     @BindView(R.id.rules_button_post_text_activity) Button rulesButton;
@@ -95,9 +95,8 @@ public class PostTextActivity extends AppCompatActivity implements FlairBottomSh
 
         ((Infinity) getApplication()).getmAppComponent().inject(this);
 
-        ActionBar actionBar = getSupportActionBar();
+        setSupportActionBar(toolbar);
-        Drawable upArrow = getResources().getDrawable(R.drawable.ic_arrow_back_white_24dp);
+        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
-        actionBar.setHomeAsUpIndicator(upArrow);
 
         mGlide = Glide.with(this);
         mLocale = getResources().getConfiguration().locale;

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

@@ -19,8 +19,8 @@ import android.widget.VideoView;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
-import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.Toolbar;
 import androidx.constraintlayout.widget.ConstraintLayout;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
 
@@ -66,6 +66,7 @@ public class PostVideoActivity extends AppCompatActivity implements FlairBottomS
     private static final int CAPTURE_VIDEO_REQUEST_CODE = 2;
 
     @BindView(R.id.coordinator_layout_post_video_activity) CoordinatorLayout coordinatorLayout;
+    @BindView(R.id.toolbar_post_video_activity) Toolbar toolbar;
     @BindView(R.id.subreddit_icon_gif_image_view_post_video_activity) GifImageView iconGifImageView;
     @BindView(R.id.subreddit_name_text_view_post_video_activity) TextView subreditNameTextView;
     @BindView(R.id.rules_button_post_video_activity) Button rulesButton;
@@ -127,9 +128,8 @@ public class PostVideoActivity extends AppCompatActivity implements FlairBottomS
 
         ((Infinity) getApplication()).getmAppComponent().inject(this);
 
-        ActionBar actionBar = getSupportActionBar();
+        setSupportActionBar(toolbar);
-        Drawable upArrow = getResources().getDrawable(R.drawable.ic_arrow_back_white_24dp);
+        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
-        actionBar.setHomeAsUpIndicator(upArrow);
 
         mGlide = Glide.with(this);
         mLocale = getResources().getConfiguration().locale;

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

@@ -1,9 +1,11 @@
 package ml.docilealligator.infinityforreddit;
 
+import android.app.Activity;
 import android.content.Intent;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
+import android.view.View;
 import android.view.WindowManager;
 import android.widget.RelativeLayout;
 import android.widget.TextView;
@@ -22,11 +24,15 @@ public class SearchActivity extends AppCompatActivity {
 
     static final String EXTRA_SUBREDDIT_NAME = "ESN";
     static final String EXTRA_SUBREDDIT_IS_USER = "ESIU";
+    static final String EXTRA_SEARCH_ONLY_SUBREDDITS = "ESOS";
+    static final String EXTRA_RETURN_SUBREDDIT_NAME = "ERSN";
+    static final String EXTRA_RETURN_SUBREDDIT_ICON_URL = "ERSIURL";
 
     private static final String SUBREDDIT_NAME_STATE = "SNS";
     private static final String SUBREDDIT_IS_USER_STATE = "SIUS";
 
     private static final int SUBREDDIT_SELECTION_REQUEST_CODE = 0;
+    private static final int SUBREDDIT_SEARCH_REQUEST_CODE = 1;
 
     @BindView(R.id.toolbar) Toolbar toolbar;
     @BindView(R.id.search_view_search_activity) SimpleSearchView simpleSearchView;
@@ -45,6 +51,8 @@ public class SearchActivity extends AppCompatActivity {
 
         setSupportActionBar(toolbar);
 
+        boolean searchOnlySubreddits = getIntent().getExtras().getBoolean(EXTRA_SEARCH_ONLY_SUBREDDITS);
+
         simpleSearchView.setOnSearchViewListener(new SimpleSearchView.SearchViewListener() {
             @Override
             public void onSearchViewShown() {
@@ -70,19 +78,24 @@ public class SearchActivity extends AppCompatActivity {
         simpleSearchView.setOnQueryTextListener(new SimpleSearchView.OnQueryTextListener() {
             @Override
             public boolean onQueryTextSubmit(String query) {
-                Intent intent = new Intent(SearchActivity.this, SearchResultActivity.class);
+                if(searchOnlySubreddits) {
-                intent.putExtra(SearchResultActivity.EXTRA_QUERY, query);
+                    Intent intent = new Intent(SearchActivity.this, SearchSubredditsResultActivity.class);
-                if(subredditName != null) {
+                    intent.putExtra(SearchSubredditsResultActivity.EXTRA_QUERY, query);
-                    if(subredditIsUser) {
+                    startActivityForResult(intent, SUBREDDIT_SEARCH_REQUEST_CODE);
-                        intent.putExtra(SearchResultActivity.EXTRA_SUBREDDIT_NAME, "u_" + subredditName);
+                } else {
-                    } else {
+                    Intent intent = new Intent(SearchActivity.this, SearchResultActivity.class);
-                        intent.putExtra(SearchResultActivity.EXTRA_SUBREDDIT_NAME, subredditName);
+                    intent.putExtra(SearchResultActivity.EXTRA_QUERY, query);
+                    if(subredditName != null) {
+                        if(subredditIsUser) {
+                            intent.putExtra(SearchResultActivity.EXTRA_SUBREDDIT_NAME, "u_" + subredditName);
+                        } else {
+                            intent.putExtra(SearchResultActivity.EXTRA_SUBREDDIT_NAME, subredditName);
+                        }
                     }
+                    startActivity(intent);
+                    finish();
                 }
-
+                return true;
-                finish();
-                startActivity(intent);
-                return false;
             }
 
             @Override
@@ -107,11 +120,15 @@ public class SearchActivity extends AppCompatActivity {
             }
         }
 
-        subredditNameRelativeLayout.setOnClickListener(view -> {
+        if(searchOnlySubreddits) {
-            Intent intent = new Intent(this, SubredditSelectionActivity.class);
+            subredditNameRelativeLayout.setVisibility(View.GONE);
-            intent.putExtra(SubredditSelectionActivity.EXTRA_EXTRA_CLEAR_SELECTION, true);
+        } else {
-            startActivityForResult(intent, SUBREDDIT_SELECTION_REQUEST_CODE);
+            subredditNameRelativeLayout.setOnClickListener(view -> {
-        });
+                Intent intent = new Intent(this, SubredditSelectionActivity.class);
+                intent.putExtra(SubredditSelectionActivity.EXTRA_EXTRA_CLEAR_SELECTION, true);
+                startActivityForResult(intent, SUBREDDIT_SELECTION_REQUEST_CODE);
+            });
+        }
 
         Intent intent = getIntent();
         if(intent.hasExtra(EXTRA_SUBREDDIT_NAME)) {
@@ -146,6 +163,16 @@ public class SearchActivity extends AppCompatActivity {
                     subredditNameTextView.setText(subredditName);
                 }
             }
+        } else if(requestCode == SUBREDDIT_SEARCH_REQUEST_CODE) {
+            if(resultCode == RESULT_OK) {
+                String name = data.getExtras().getString(SearchSubredditsResultActivity.EXTRA_RETURN_SUBREDDIT_NAME);
+                String iconUrl = data.getExtras().getString(SearchSubredditsResultActivity.EXTRA_RETURN_SUBREDDIT_ICON_URL);
+                Intent returnIntent = new Intent();
+                returnIntent.putExtra(EXTRA_RETURN_SUBREDDIT_NAME, name);
+                returnIntent.putExtra(EXTRA_RETURN_SUBREDDIT_ICON_URL, iconUrl);
+                setResult(Activity.RESULT_OK, returnIntent);
+                finish();
+            }
         }
 
         super.onActivityResult(requestCode, resultCode, data);

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

@@ -149,7 +149,8 @@ public class SearchResultActivity extends AppCompatActivity implements SearchPos
                 case 1: {
                     SubredditListingFragment mFragment = new SubredditListingFragment();
                     Bundle bundle = new Bundle();
-                    bundle.putString(SubredditListingFragment.QUERY_KEY, mQuery);
+                    bundle.putString(SubredditListingFragment.EXTRA_QUERY_KEY, mQuery);
+                    bundle.putBoolean(SubredditListingFragment.EXTRA_IS_POSTING, false);
                     mFragment.setArguments(bundle);
                     return mFragment;
                 }

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

@@ -0,0 +1,68 @@
+package ml.docilealligator.infinityforreddit;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.os.Bundle;
+
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.Toolbar;
+import androidx.fragment.app.Fragment;
+
+import butterknife.BindView;
+import butterknife.ButterKnife;
+
+public class SearchSubredditsResultActivity extends AppCompatActivity {
+
+    static final String EXTRA_QUERY = "EQ";
+    static final String EXTRA_RETURN_SUBREDDIT_NAME = "ERSN";
+    static final String EXTRA_RETURN_SUBREDDIT_ICON_URL = "ERSIURL";
+
+    private static final String FRAGMENT_OUT_STATE = "FOS";
+
+    @BindView(R.id.toolbar_search_subreddits_result_activity) Toolbar toolbar;
+
+    Fragment mFragment;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_search_subreddits_result);
+
+        ButterKnife.bind(this);
+
+        setSupportActionBar(toolbar);
+        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
+
+        String query = getIntent().getExtras().getString(EXTRA_QUERY);
+
+        if(savedInstanceState == null) {
+            mFragment = new SubredditListingFragment();
+            Bundle bundle = new Bundle();
+            bundle.putString(SubredditListingFragment.EXTRA_QUERY_KEY, query);
+            bundle.putBoolean(SubredditListingFragment.EXTRA_IS_POSTING, true);
+            mFragment.setArguments(bundle);
+            getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout_search_subreddits_result_activity, mFragment).commit();
+        } else {
+            mFragment = getSupportFragmentManager().getFragment(savedInstanceState, FRAGMENT_OUT_STATE);
+            getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout_search_subreddits_result_activity, mFragment).commit();
+
+        }
+    }
+
+    void getSelectedSubreddit(String name, String iconUrl) {
+        Intent returnIntent = new Intent();
+        returnIntent.putExtra(EXTRA_RETURN_SUBREDDIT_NAME, name);
+        returnIntent.putExtra(EXTRA_RETURN_SUBREDDIT_ICON_URL, iconUrl);
+        setResult(Activity.RESULT_OK, returnIntent);
+        finish();
+    }
+
+    @Override
+    protected void onSaveInstanceState(@NonNull Bundle outState) {
+        super.onSaveInstanceState(outState);
+        if (mFragment != null) {
+            getSupportFragmentManager().putFragment(outState, FRAGMENT_OUT_STATE, mFragment);
+        }
+    }
+}

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

@@ -1,6 +1,8 @@
 package ml.docilealligator.infinityforreddit;
 
 
+import android.app.Activity;
+import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.view.LayoutInflater;
@@ -33,7 +35,8 @@ import retrofit2.Retrofit;
  */
 public class SubredditListingFragment extends Fragment implements FragmentCommunicator {
 
-    static final String QUERY_KEY = "QK";
+    static final String EXTRA_QUERY_KEY = "EQK";
+    static final String EXTRA_IS_POSTING = "EIP";
 
     @BindView(R.id.coordinator_layout_subreddit_listing_fragment) CoordinatorLayout mCoordinatorLayout;
     @BindView(R.id.recycler_view_subreddit_listing_fragment) RecyclerView mSubredditListingRecyclerView;
@@ -44,8 +47,6 @@ public class SubredditListingFragment extends Fragment implements FragmentCommun
 
     private LinearLayoutManager mLinearLayoutManager;
 
-    private String mQuery;
-
     private SubredditListingRecyclerViewAdapter mAdapter;
 
     SubredditListingViewModel mSubredditListingViewModel;
@@ -70,16 +71,19 @@ public class SubredditListingFragment extends Fragment implements FragmentCommun
         // Inflate the layout for this fragment
         View rootView = inflater.inflate(R.layout.fragment_subreddit_listing, container, false);
 
-        ((Infinity) getActivity().getApplication()).getmAppComponent().inject(this);
+        Activity activity = getActivity();
+
+        ((Infinity) activity.getApplication()).getmAppComponent().inject(this);
 
         ButterKnife.bind(this, rootView);
 
         mLinearLayoutManager = new LinearLayoutManager(getActivity());
         mSubredditListingRecyclerView.setLayoutManager(mLinearLayoutManager);
 
-        mQuery = getArguments().getString(QUERY_KEY);
+        String query = getArguments().getString(EXTRA_QUERY_KEY);
+        boolean isPosting = getArguments().getBoolean(EXTRA_IS_POSTING);
 
-        SubredditListingViewModel.Factory factory = new SubredditListingViewModel.Factory(mRetrofit, mQuery,
+        SubredditListingViewModel.Factory factory = new SubredditListingViewModel.Factory(mRetrofit, query,
                 PostDataSource.SORT_TYPE_RELEVANCE, new SubredditListingDataSource.OnSubredditListingDataFetchedCallback() {
             @Override
             public void hasSubreddit() {
@@ -98,7 +102,23 @@ public class SubredditListingFragment extends Fragment implements FragmentCommun
         mAdapter = new SubredditListingRecyclerViewAdapter(getActivity(), mOauthRetrofit, mRetrofit,
                 mAuthInfoSharedPreferences,
                 SubscribedSubredditRoomDatabase.getDatabase(getContext()).subscribedSubredditDao(),
-                () -> mSubredditListingViewModel.retryLoadingMore());
+                new SubredditListingRecyclerViewAdapter.Callback() {
+                    @Override
+                    public void retryLoadingMore() {
+                        mSubredditListingViewModel.retryLoadingMore();
+                    }
+
+                    @Override
+                    public void subredditSelected(String subredditName, String iconUrl) {
+                        if(isPosting) {
+                            ((SearchSubredditsResultActivity) activity).getSelectedSubreddit(subredditName, iconUrl);
+                        } else {
+                            Intent intent = new Intent(activity, ViewSubredditDetailActivity.class);
+                            intent.putExtra(ViewSubredditDetailActivity.EXTRA_SUBREDDIT_NAME_KEY, subredditName);
+                            activity.startActivity(intent);
+                        }
+                    }
+                });
 
         mSubredditListingRecyclerView.setAdapter(mAdapter);
 

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

@@ -1,7 +1,6 @@
 package ml.docilealligator.infinityforreddit;
 
 import android.content.Context;
-import android.content.Intent;
 import android.content.SharedPreferences;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -31,8 +30,9 @@ import pl.droidsonroids.gif.GifImageView;
 import retrofit2.Retrofit;
 
 public class SubredditListingRecyclerViewAdapter extends PagedListAdapter<SubredditData, RecyclerView.ViewHolder> {
-    interface RetryLoadingMoreCallback {
+    interface Callback {
         void retryLoadingMore();
+        void subredditSelected(String subredditName, String iconUrl);
     }
 
     private RequestManager glide;
@@ -48,19 +48,19 @@ public class SubredditListingRecyclerViewAdapter extends PagedListAdapter<Subred
     private SubscribedSubredditDao subscribedSubredditDao;
 
     private NetworkState networkState;
-    private RetryLoadingMoreCallback retryLoadingMoreCallback;
+    private Callback callback;
 
     SubredditListingRecyclerViewAdapter(Context context, Retrofit oauthRetrofit, Retrofit retrofit,
                                         SharedPreferences authInfoSharedPreferences,
                                         SubscribedSubredditDao subscribedSubredditDao,
-                                        RetryLoadingMoreCallback retryLoadingMoreCallback) {
+                                        Callback callback) {
         super(DIFF_CALLBACK);
         this.context = context;
         this.oauthRetrofit = oauthRetrofit;
         this.retrofit = retrofit;
         this.authInfoSharedPreferences = authInfoSharedPreferences;
         this.subscribedSubredditDao = subscribedSubredditDao;
-        this.retryLoadingMoreCallback = retryLoadingMoreCallback;
+        this.callback = callback;
         glide = Glide.with(context.getApplicationContext());
     }
 
@@ -95,11 +95,8 @@ public class SubredditListingRecyclerViewAdapter extends PagedListAdapter<Subred
     public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
         if(holder instanceof DataViewHolder) {
             SubredditData subredditData = getItem(position);
-            ((DataViewHolder) holder).constraintLayout.setOnClickListener(view -> {
+            ((DataViewHolder) holder).constraintLayout.setOnClickListener(view ->
-                Intent intent = new Intent(context, ViewSubredditDetailActivity.class);
+                    callback.subredditSelected(subredditData.getName(), subredditData.getIconUrl()));
-                intent.putExtra(ViewSubredditDetailActivity.EXTRA_SUBREDDIT_NAME_KEY, subredditData.getName());
-                context.startActivity(intent);
-            });
 
             if(!subredditData.getIconUrl().equals("")) {
                 glide.load(subredditData.getIconUrl())
@@ -207,7 +204,7 @@ public class SubredditListingRecyclerViewAdapter extends PagedListAdapter<Subred
         ErrorViewHolder(View itemView) {
             super(itemView);
             ButterKnife.bind(this, itemView);
-            retryButton.setOnClickListener(view -> retryLoadingMoreCallback.retryLoadingMore());
+            retryButton.setOnClickListener(view -> callback.retryLoadingMore());
             errorTextView.setText(R.string.load_comments_failed);
         }
     }

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

@@ -2,14 +2,17 @@ package ml.docilealligator.infinityforreddit;
 
 import android.app.Activity;
 import android.content.Intent;
-import android.graphics.drawable.Drawable;
 import android.os.Bundle;
+import android.view.Menu;
 import android.view.MenuItem;
 
 import androidx.annotation.NonNull;
-import androidx.appcompat.app.ActionBar;
+import androidx.annotation.Nullable;
 import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.Toolbar;
+import androidx.fragment.app.Fragment;
 
+import butterknife.BindView;
 import butterknife.ButterKnife;
 
 public class SubredditSelectionActivity extends AppCompatActivity {
@@ -19,6 +22,13 @@ public class SubredditSelectionActivity extends AppCompatActivity {
     static final String EXTRA_RETURN_SUBREDDIT_ICON_URL = "ERSIURL";
     static final String EXTRA_RETURN_SUBREDDIT_IS_USER = "ERSIU";
 
+    private static final int SUBREDDIT_SEARCH_REQUEST_CODE = 0;
+    private static final String FRAGMENT_OUT_STATE = "FOS";
+
+    @BindView(R.id.toolbar_subreddit_selection_activity) Toolbar toolbar;
+
+    private Fragment mFragment;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -26,19 +36,29 @@ public class SubredditSelectionActivity extends AppCompatActivity {
 
         ButterKnife.bind(this);
 
-        ActionBar actionBar = getSupportActionBar();
+        setSupportActionBar(toolbar);
-        Drawable upArrow = getResources().getDrawable(R.drawable.ic_arrow_back_white_24dp);
+        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
-        actionBar.setHomeAsUpIndicator(upArrow);
 
-        SubscribedSubredditsListingFragment fragment = new SubscribedSubredditsListingFragment();
+        if(savedInstanceState == null) {
-        Bundle bundle = new Bundle();
+            mFragment = new SubscribedSubredditsListingFragment();
-        bundle.putBoolean(SubscribedSubredditsListingFragment.EXTRA_IS_SUBREDDIT_SELECTION, true);
+            Bundle bundle = new Bundle();
-        if(getIntent().hasExtra(EXTRA_EXTRA_CLEAR_SELECTION)) {
+            bundle.putBoolean(SubscribedSubredditsListingFragment.EXTRA_IS_SUBREDDIT_SELECTION, true);
-            bundle.putBoolean(SubscribedSubredditsListingFragment.EXTRA_EXTRA_CLEAR_SELECTION,
+            if(getIntent().hasExtra(EXTRA_EXTRA_CLEAR_SELECTION)) {
-                    getIntent().getExtras().getBoolean(EXTRA_EXTRA_CLEAR_SELECTION));
+                bundle.putBoolean(SubscribedSubredditsListingFragment.EXTRA_EXTRA_CLEAR_SELECTION,
+                        getIntent().getExtras().getBoolean(EXTRA_EXTRA_CLEAR_SELECTION));
+            }
+            mFragment.setArguments(bundle);
+            getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout_subreddit_selection_activity, mFragment).commit();
+        } else {
+            mFragment = getSupportFragmentManager().getFragment(savedInstanceState, FRAGMENT_OUT_STATE);
+            getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout_subreddit_selection_activity, mFragment).commit();
         }
-        fragment.setArguments(bundle);
+    }
-        getSupportFragmentManager().beginTransaction().replace(R.id.frame_layout_subreddit_selection_activity, fragment).commit();
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        getMenuInflater().inflate(R.menu.subreddit_selection_activity, menu);
+        return true;
     }
 
     @Override
@@ -47,6 +67,11 @@ public class SubredditSelectionActivity extends AppCompatActivity {
             case android.R.id.home:
                 finish();
                 return true;
+            case R.id.action_search_subreddit_selection_activity:
+                Intent intent = new Intent(this, SearchActivity.class);
+                intent.putExtra(SearchActivity.EXTRA_SEARCH_ONLY_SUBREDDITS, true);
+                startActivityForResult(intent, SUBREDDIT_SEARCH_REQUEST_CODE);
+                return true;
         }
 
         return false;
@@ -60,4 +85,29 @@ public class SubredditSelectionActivity extends AppCompatActivity {
         setResult(Activity.RESULT_OK, returnIntent);
         finish();
     }
+
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
+        if(requestCode == SUBREDDIT_SEARCH_REQUEST_CODE) {
+            if(resultCode == RESULT_OK) {
+                String name = data.getExtras().getString(SearchActivity.EXTRA_RETURN_SUBREDDIT_NAME);
+                String iconUrl = data.getExtras().getString(SearchActivity.EXTRA_RETURN_SUBREDDIT_ICON_URL);
+                Intent returnIntent = new Intent();
+                returnIntent.putExtra(EXTRA_RETURN_SUBREDDIT_NAME, name);
+                returnIntent.putExtra(EXTRA_RETURN_SUBREDDIT_ICON_URL, iconUrl);
+                returnIntent.putExtra(EXTRA_RETURN_SUBREDDIT_IS_USER, false);
+                setResult(Activity.RESULT_OK, returnIntent);
+                finish();
+            }
+        }
+        super.onActivityResult(requestCode, resultCode, data);
+    }
+
+    @Override
+    protected void onSaveInstanceState(@NonNull Bundle outState) {
+        super.onSaveInstanceState(outState);
+        if (mFragment != null) {
+            getSupportFragmentManager().putFragment(outState, FRAGMENT_OUT_STATE, mFragment);
+        }
+    }
 }

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

@@ -312,6 +312,7 @@ public class ViewSubredditDetailActivity extends AppCompatActivity implements So
                 Intent intent = new Intent(this, SearchActivity.class);
                 intent.putExtra(SearchActivity.EXTRA_SUBREDDIT_NAME, subredditName);
                 intent.putExtra(SearchActivity.EXTRA_SUBREDDIT_IS_USER, false);
+                intent.putExtra(SearchActivity.EXTRA_SEARCH_ONLY_SUBREDDITS, false);
                 startActivity(intent);
                 break;
             case R.id.action_refresh_view_subreddit_detail_activity:

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

@@ -328,6 +328,7 @@ public class ViewUserDetailActivity extends AppCompatActivity {
                 Intent intent = new Intent(this, SearchActivity.class);
                 intent.putExtra(SearchActivity.EXTRA_SUBREDDIT_NAME, userName);
                 intent.putExtra(SearchActivity.EXTRA_SUBREDDIT_IS_USER, true);
+                intent.putExtra(SearchActivity.EXTRA_SEARCH_ONLY_SUBREDDITS, false);
                 startActivity(intent);
                 break;
             case R.id.action_refresh_view_user_detail_activity:

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

@@ -7,10 +7,24 @@
     android:id="@+id/coordinator_layout_post_image_activity"
     tools:context=".PostImageActivity">
 
+    <com.google.android.material.appbar.AppBarLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:theme="@style/AppTheme.AppBarOverlay">
+
+        <androidx.appcompat.widget.Toolbar
+            android:id="@+id/toolbar_post_image_activity"
+            android:layout_width="match_parent"
+            android:layout_height="?attr/actionBarSize"
+            app:popupTheme="@style/AppTheme.PopupOverlay"
+            app:navigationIcon="?attr/homeAsUpIndicator" />
+
+    </com.google.android.material.appbar.AppBarLayout>
+
     <androidx.core.widget.NestedScrollView
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:fillViewport="true">
+        app:layout_behavior="@string/appbar_scrolling_view_behavior">
 
         <LinearLayout
             android:layout_width="match_parent"

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

@@ -7,10 +7,24 @@
     android:id="@+id/coordinator_layout_post_link_activity"
     tools:context=".PostTextActivity">
 
+    <com.google.android.material.appbar.AppBarLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:theme="@style/AppTheme.AppBarOverlay">
+
+        <androidx.appcompat.widget.Toolbar
+            android:id="@+id/toolbar_post_link_activity"
+            android:layout_width="match_parent"
+            android:layout_height="?attr/actionBarSize"
+            app:popupTheme="@style/AppTheme.PopupOverlay"
+            app:navigationIcon="?attr/homeAsUpIndicator" />
+
+    </com.google.android.material.appbar.AppBarLayout>
+
     <androidx.core.widget.NestedScrollView
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:fillViewport="true">
+        app:layout_behavior="@string/appbar_scrolling_view_behavior">
 
         <LinearLayout
             android:layout_width="match_parent"

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

@@ -7,10 +7,24 @@
     android:id="@+id/coordinator_layout_post_text_activity"
     tools:context=".PostTextActivity">
 
+    <com.google.android.material.appbar.AppBarLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:theme="@style/AppTheme.AppBarOverlay">
+
+        <androidx.appcompat.widget.Toolbar
+            android:id="@+id/toolbar_post_text_activity"
+            android:layout_width="match_parent"
+            android:layout_height="?attr/actionBarSize"
+            app:popupTheme="@style/AppTheme.PopupOverlay"
+            app:navigationIcon="?attr/homeAsUpIndicator" />
+
+    </com.google.android.material.appbar.AppBarLayout>
+
     <androidx.core.widget.NestedScrollView
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:fillViewport="true">
+        app:layout_behavior="@string/appbar_scrolling_view_behavior">
 
         <LinearLayout
             android:layout_width="match_parent"

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

@@ -7,10 +7,24 @@
     android:id="@+id/coordinator_layout_post_video_activity"
     tools:context=".PostImageActivity">
 
+    <com.google.android.material.appbar.AppBarLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:theme="@style/AppTheme.AppBarOverlay">
+
+        <androidx.appcompat.widget.Toolbar
+            android:id="@+id/toolbar_post_video_activity"
+            android:layout_width="match_parent"
+            android:layout_height="?attr/actionBarSize"
+            app:popupTheme="@style/AppTheme.PopupOverlay"
+            app:navigationIcon="?attr/homeAsUpIndicator" />
+
+    </com.google.android.material.appbar.AppBarLayout>
+
     <androidx.core.widget.NestedScrollView
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:fillViewport="true">
+        app:layout_behavior="@string/appbar_scrolling_view_behavior">
 
         <LinearLayout
             android:layout_width="match_parent"

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

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".SearchSubredditsResultActivity">
+
+    <com.google.android.material.appbar.AppBarLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:theme="@style/AppTheme.AppBarOverlay">
+
+        <androidx.appcompat.widget.Toolbar
+            android:id="@+id/toolbar_search_subreddits_result_activity"
+            android:layout_width="match_parent"
+            android:layout_height="?attr/actionBarSize"
+            app:popupTheme="@style/AppTheme.PopupOverlay"
+            app:navigationIcon="?attr/homeAsUpIndicator" />
+
+    </com.google.android.material.appbar.AppBarLayout>
+
+    <FrameLayout
+        android:id="@+id/frame_layout_search_subreddits_result_activity"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:layout_behavior="@string/appbar_scrolling_view_behavior" />
+
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

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

@@ -1,8 +1,29 @@
 <?xml version="1.0" encoding="utf-8"?>
-<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:id="@+id/frame_layout_subreddit_selection_activity"
+    tools:context=".SubredditSelectionActivity">
-    tools:context=".SubredditSelectionActivity" />
+
+    <com.google.android.material.appbar.AppBarLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:theme="@style/AppTheme.AppBarOverlay">
+
+        <androidx.appcompat.widget.Toolbar
+            android:id="@+id/toolbar_subreddit_selection_activity"
+            android:layout_width="match_parent"
+            android:layout_height="?attr/actionBarSize"
+            app:popupTheme="@style/AppTheme.PopupOverlay"
+            app:navigationIcon="?attr/homeAsUpIndicator" />
+
+    </com.google.android.material.appbar.AppBarLayout>
+
+    <FrameLayout
+        android:id="@+id/frame_layout_subreddit_selection_activity"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:layout_behavior="@string/appbar_scrolling_view_behavior" />
+
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

app/src/main/res/menu/subreddit_selection_activity.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+    <item
+        android:id="@+id/action_search_subreddit_selection_activity"
+        android:orderInCategory="1"
+        android:title="@string/action_search"
+        android:icon="@drawable/ic_search_white_24dp"
+        app:showAsAction="ifRoom" />
+</menu>

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

@@ -10,6 +10,7 @@
     <string name="post_image_activity_label">Image Post</string>
     <string name="post_video_activity_label">Video Post</string>
     <string name="rules_activity_label">Rules</string>
+    <string name="search_subreddits_activity_label">Subreddits</string>
 
     <string name="navigation_drawer_open">Open navigation drawer</string>
     <string name="navigation_drawer_close">Close navigation drawer</string>