Click a comment to view the corresponding post.

11 files changed, 259 insertions, 54 deletions

diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/CommentData.java b/app/src/main/java/ml/docilealligator/infinityforreddit/CommentData.java
index fe2806ba..e0c697b6 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/CommentData.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/CommentData.java
@@ -15,6 +15,8 @@ class CommentData implements Parcelable {
     private String author;
     private String commentTime;
     private String commentContent;
+    private String linkId;
+    private String subredditName;
     private String parentId;
     private int score;
     private int voteType;
@@ -34,13 +36,15 @@ class CommentData implements Parcelable {
     private boolean loadMoreChildrenFailed;
 
     CommentData(String id, String fullName, String author, String commentTime, String commentContent,
-                String parentId, int score, boolean isSubmitter, String permalink, int depth,
-                boolean collapsed, boolean hasReply, boolean scoreHidden) {
+                String linkId, String subredditName, String parentId, int score, boolean isSubmitter, String permalink,
+                int depth, boolean collapsed, boolean hasReply, boolean scoreHidden) {
         this.id = id;
         this.fullName = fullName;
         this.author = author;
         this.commentTime = commentTime;
         this.commentContent = commentContent;
+        this.linkId = linkId;
+        this.subredditName = subredditName;
         this.parentId = parentId;
         this.score = score;
         this.isSubmitter = isSubmitter;
@@ -68,6 +72,8 @@ class CommentData implements Parcelable {
         author = in.readString();
         commentTime = in.readString();
         commentContent = in.readString();
+        linkId = in.readString();
+        subredditName = in.readString();
         parentId = in.readString();
         score = in.readInt();
         voteType = in.readInt();
@@ -118,6 +124,14 @@ class CommentData implements Parcelable {
         return commentContent;
     }
 
+    public String getLinkId() {
+        return linkId;
+    }
+
+    public String getSubredditName() {
+        return subredditName;
+    }
+
     public String getParentId() {
         return parentId;
     }
@@ -265,6 +279,8 @@ class CommentData implements Parcelable {
         parcel.writeString(author);
         parcel.writeString(commentTime);
         parcel.writeString(commentContent);
+        parcel.writeString(linkId);
+        parcel.writeString(subredditName);
         parcel.writeString(parentId);
         parcel.writeInt(score);
         parcel.writeInt(voteType);
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/CommentsListingRecyclerViewAdapter.java b/app/src/main/java/ml/docilealligator/infinityforreddit/CommentsListingRecyclerViewAdapter.java
index 8075c245..6aac6a53 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/CommentsListingRecyclerViewAdapter.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/CommentsListingRecyclerViewAdapter.java
@@ -18,6 +18,8 @@ import androidx.paging.PagedListAdapter;
 import androidx.recyclerview.widget.DiffUtil;
 import androidx.recyclerview.widget.RecyclerView;
 
+import com.google.android.material.card.MaterialCardView;
+
 import CustomView.CustomMarkwonView;
 import butterknife.BindView;
 import butterknife.ButterKnife;
@@ -27,6 +29,8 @@ class CommentsListingRecyclerViewAdapter extends PagedListAdapter<CommentData, R
     private Context mContext;
     private Retrofit mOauthRetrofit;
     private SharedPreferences mSharedPreferences;
+    private int textColorPrimaryDark;
+    private int colorAccent;
 
     private static final int VIEW_TYPE_DATA = 0;
     private static final int VIEW_TYPE_ERROR = 1;
@@ -46,6 +50,8 @@ class CommentsListingRecyclerViewAdapter extends PagedListAdapter<CommentData, R
         mOauthRetrofit = oauthRetrofit;
         mSharedPreferences = sharedPreferences;
         mRetryLoadingMoreCallback = retryLoadingMoreCallback;
+        textColorPrimaryDark = mContext.getResources().getColor(R.color.textColorPrimaryDark);
+        colorAccent = mContext.getResources().getColor(R.color.colorAccent);
     }
 
     private static final DiffUtil.ItemCallback<CommentData> DIFF_CALLBACK = new DiffUtil.ItemCallback<CommentData>() {
@@ -80,8 +86,23 @@ class CommentsListingRecyclerViewAdapter extends PagedListAdapter<CommentData, R
         if(holder instanceof DataViewHolder) {
             CommentData comment = getItem(holder.getAdapterPosition());
 
-            String authorPrefixed = "u/" + comment.getAuthor();
-            ((DataViewHolder) holder).authorTextView.setText(authorPrefixed);
+            if(comment.getAuthor().equals(comment.getSubredditName().substring(2))) {
+                ((DataViewHolder) holder).authorTextView.setText("u/" + comment.getAuthor());
+                ((DataViewHolder) holder).authorTextView.setTextColor(textColorPrimaryDark);
+                ((DataViewHolder) holder).authorTextView.setOnClickListener(view -> {
+                    Intent intent = new Intent(mContext, ViewUserDetailActivity.class);
+                    intent.putExtra(ViewUserDetailActivity.EXTRA_USER_NAME_KEY, comment.getAuthor());
+                    mContext.startActivity(intent);
+                });
+            } else {
+                ((DataViewHolder) holder).authorTextView.setText("r/" + comment.getSubredditName());
+                ((DataViewHolder) holder).authorTextView.setTextColor(colorAccent);
+                ((DataViewHolder) holder).authorTextView.setOnClickListener(view -> {
+                    Intent intent = new Intent(mContext, ViewSubredditDetailActivity.class);
+                    intent.putExtra(ViewSubredditDetailActivity.EXTRA_SUBREDDIT_NAME_KEY, comment.getSubredditName());
+                    mContext.startActivity(intent);
+                });
+            }
 
             ((DataViewHolder) holder).commentTimeTextView.setText(comment.getCommentTime());
 
@@ -144,6 +165,7 @@ class CommentsListingRecyclerViewAdapter extends PagedListAdapter<CommentData, R
     }
 
     class DataViewHolder extends RecyclerView.ViewHolder {
+        @BindView(R.id.card_view_item_comment) MaterialCardView cardView;
         @BindView(R.id.vertical_block_item_post_comment) View verticalBlock;
         @BindView(R.id.author_text_view_item_post_comment) TextView authorTextView;
         @BindView(R.id.comment_time_text_view_item_post_comment) TextView commentTimeTextView;
@@ -158,14 +180,16 @@ class CommentsListingRecyclerViewAdapter extends PagedListAdapter<CommentData, R
             super(itemView);
             ButterKnife.bind(this, itemView);
 
-            verticalBlock.setVisibility(View.GONE);
-
-            authorTextView.setOnClickListener(view -> {
-                Intent intent = new Intent(mContext, ViewUserDetailActivity.class);
-                intent.putExtra(ViewUserDetailActivity.EXTRA_USER_NAME_KEY, getItem(getAdapterPosition()).getAuthor());
+            cardView.setOnClickListener(view -> {
+                Intent intent = new Intent(mContext, ViewPostDetailActivity.class);
+                intent.putExtra(ViewPostDetailActivity.EXTRA_POST_ID, getItem(getAdapterPosition()).getLinkId());
                 mContext.startActivity(intent);
             });
 
+            verticalBlock.setVisibility(View.GONE);
+
+            commentMarkdownView.setOnClickListener(view -> cardView.callOnClick());
+
             RelativeLayout.LayoutParams lp = (RelativeLayout.LayoutParams) shareButton.getLayoutParams();
             lp.addRule(RelativeLayout.ALIGN_PARENT_END);
             lp.setMarginEnd(0);
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/JSONUtils.java b/app/src/main/java/ml/docilealligator/infinityforreddit/JSONUtils.java
index 9240ccd3..f0f72a28 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/JSONUtils.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/JSONUtils.java
@@ -61,6 +61,7 @@ public class JSONUtils {
     static final String IS_FRIEND_KEY = "is_friend";
     static final String JSON_KEY = "json";
     static final String PARENT_ID_KEY = "parent_id";
+    static final String LINK_ID_KEY = "link_id";
     static final String ERRORS_KEY = "errors";
     static final String ARGS_KEY = "args";
     static final String FIELDS_KEY = "fields";
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/ParseComment.java b/app/src/main/java/ml/docilealligator/infinityforreddit/ParseComment.java
index cb6b8acc..2edb526e 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/ParseComment.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/ParseComment.java
@@ -215,6 +215,8 @@ class ParseComment {
         String id = singleCommentData.getString(JSONUtils.ID_KEY);
         String fullName = singleCommentData.getString(JSONUtils.NAME_KEY);
         String author = singleCommentData.getString(JSONUtils.AUTHOR_KEY);
+        String linkId = singleCommentData.getString(JSONUtils.LINK_ID_KEY).substring(3);
+        String subredditName = singleCommentData.getString(JSONUtils.SUBREDDIT_KEY);
         String parentId = singleCommentData.getString(JSONUtils.PARENT_ID_KEY);
         boolean isSubmitter = singleCommentData.getBoolean(JSONUtils.IS_SUBMITTER_KEY);
         String commentContent = "";
@@ -238,7 +240,7 @@ class ParseComment {
         boolean collapsed = singleCommentData.getBoolean(JSONUtils.COLLAPSED_KEY);
         boolean hasReply = !(singleCommentData.get(JSONUtils.REPLIES_KEY) instanceof String);
 
-        return new CommentData(id, fullName, author, formattedSubmitTime, commentContent, parentId, score,
-                isSubmitter, permalink, depth, collapsed, hasReply, scoreHidden);
+        return new CommentData(id, fullName, author, formattedSubmitTime, commentContent, linkId,
+                subredditName, parentId, score, isSubmitter, permalink, depth, collapsed, hasReply, scoreHidden);
     }
 }
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/PostDataSource.java b/app/src/main/java/ml/docilealligator/infinityforreddit/PostDataSource.java
index 2f5c882e..09d5451a 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/PostDataSource.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/PostDataSource.java
@@ -155,7 +155,11 @@ class PostDataSource extends PageKeyedDataSource<String, Post> {
                                         onPostFetchedCallback.hasPost();
                                     }
 
-                                    callback.onResult(newPosts, null, lastItem);
+                                    if(lastItem == null || lastItem.equals("") || lastItem.equals("null")) {
+                                        callback.onResult(newPosts, null, null);
+                                    } else {
+                                        callback.onResult(newPosts, null, lastItem);
+                                    }
                                     initialLoadStateLiveData.postValue(NetworkState.LOADED);
                                 }
 
@@ -235,7 +239,11 @@ class PostDataSource extends PageKeyedDataSource<String, Post> {
                                         onPostFetchedCallback.hasPost();
                                     }
 
-                                    callback.onResult(newPosts, null, lastItem);
+                                    if(lastItem == null || lastItem.equals("") || lastItem.equals("null")) {
+                                        callback.onResult(newPosts, null, null);
+                                    } else {
+                                        callback.onResult(newPosts, null, lastItem);
+                                    }
                                     initialLoadStateLiveData.postValue(NetworkState.LOADED);
                                 }
 
@@ -308,17 +316,18 @@ class PostDataSource extends PageKeyedDataSource<String, Post> {
                             new ParsePost.ParsePostsListingListener() {
                                 @Override
                                 public void onParsePostsListingSuccess(ArrayList<Post> newPosts, String lastItem) {
-                                    if(newPosts.size() == 0 && lastItem.equals("null")) {
-                                        callback.onResult(newPosts, null, lastItem);
-                                        initialLoadStateLiveData.postValue(NetworkState.LOADED);
+                                    if(newPosts.size() == 0) {
                                         onPostFetchedCallback.noPost();
-                                    } else if(newPosts.size() == 0) {
-                                        loadUserPostsInitial(callback, lastItem);
                                     } else {
-                                        callback.onResult(newPosts, null, lastItem);
-                                        initialLoadStateLiveData.postValue(NetworkState.LOADED);
                                         onPostFetchedCallback.hasPost();
                                     }
+
+                                    if(lastItem == null || lastItem.equals("") || lastItem.equals("null")) {
+                                        callback.onResult(newPosts, null, null);
+                                    } else {
+                                        callback.onResult(newPosts, null, lastItem);
+                                    }
+                                    initialLoadStateLiveData.postValue(NetworkState.LOADED);
                                 }
 
                                 @Override
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/RedditAPI.java b/app/src/main/java/ml/docilealligator/infinityforreddit/RedditAPI.java
index d8a86141..9ad7d23d 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/RedditAPI.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/RedditAPI.java
@@ -101,6 +101,9 @@ public interface RedditAPI {
     @GET("/r/{subredditName}/about/rules.json?raw_json=1")
     Call<String> getRules(@Path("subredditName") String subredditName);
 
+    @GET("/comments/{id}.json?raw_json=1")
+    Call<String> getPostAndCommentsById(@Path("id") String id, @HeaderMap Map<String, String> headers);
+
     @Multipart
     @POST(".")
     Call<String> uploadMediaToAWS(@PartMap()Map<String, RequestBody> params, @Part() MultipartBody.Part file);
diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/ViewPostDetailActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/ViewPostDetailActivity.java
index f605666c..8d67cd7c 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/ViewPostDetailActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/ViewPostDetailActivity.java
@@ -6,6 +6,11 @@ import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
+import android.view.View;
+import android.widget.ImageView;
+import android.widget.LinearLayout;
+import android.widget.ProgressBar;
+import android.widget.TextView;
 import android.widget.Toast;
 
 import androidx.annotation.NonNull;
@@ -31,6 +36,9 @@ import javax.inject.Named;
 
 import butterknife.BindView;
 import butterknife.ButterKnife;
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
 import retrofit2.Retrofit;
 
 import static ml.docilealligator.infinityforreddit.CommentActivity.EXTRA_COMMENT_DATA_KEY;
@@ -40,6 +48,7 @@ public class ViewPostDetailActivity extends AppCompatActivity {
 
     static final String EXTRA_POST_DATA = "EPD";
     static final String EXTRA_POST_LIST_POSITION = "EPLI";
+    static final String EXTRA_POST_ID = "EPI";
 
     private RequestManager mGlide;
     private Locale mLocale;
@@ -70,7 +79,11 @@ public class ViewPostDetailActivity extends AppCompatActivity {
 
     @BindView(R.id.coordinator_layout_view_post_detail) CoordinatorLayout mCoordinatorLayout;
     @BindView(R.id.toolbar_view_post_detail_activity) Toolbar toolbar;
+    @BindView(R.id.progress_bar_view_post_detail_activity) ProgressBar mProgressBar;
     @BindView(R.id.recycler_view_view_post_detail) RecyclerView mRecyclerView;
+    @BindView(R.id.fetch_post_info_linear_layout_view_post_detail_activity) LinearLayout mFetchPostInfoLinearLayout;
+    @BindView(R.id.fetch_post_info_image_view_view_post_detail_activity) ImageView mFetchPostInfoImageView;
+    @BindView(R.id.fetch_post_info_text_view_view_post_detail_activity) TextView mFetchPostInfoTextView;
 
     @Inject @Named("no_oauth")
     Retrofit mRetrofit;
@@ -109,43 +122,48 @@ public class ViewPostDetailActivity extends AppCompatActivity {
             mPost = savedInstanceState.getParcelable(POST_STATE);
         }
 
-        mAdapter = new CommentAndPostRecyclerViewAdapter(ViewPostDetailActivity.this, mRetrofit,
-                mOauthRetrofit, mGlide, mSharedPreferences, mPost,
-                mPost.getSubredditNamePrefixed(), mLocale, mLoadSubredditIconAsyncTask,
-                new CommentAndPostRecyclerViewAdapter.CommentRecyclerViewAdapterCallback() {
-                    @Override
-                    public void updatePost(Post post) {
-                        EventBus.getDefault().post(new PostUpdateEventToPostList(mPost, postListPosition));
-                    }
+        if(mPost == null) {
+            mProgressBar.setVisibility(View.VISIBLE);
+            fetchPostAndCommentsById(getIntent().getExtras().getString(EXTRA_POST_ID));
+        } else {
+            mAdapter = new CommentAndPostRecyclerViewAdapter(ViewPostDetailActivity.this, mRetrofit,
+                    mOauthRetrofit, mGlide, mSharedPreferences, mPost,
+                    mPost.getSubredditNamePrefixed(), mLocale, mLoadSubredditIconAsyncTask,
+                    new CommentAndPostRecyclerViewAdapter.CommentRecyclerViewAdapterCallback() {
+                        @Override
+                        public void updatePost(Post post) {
+                            EventBus.getDefault().post(new PostUpdateEventToPostList(mPost, postListPosition));
+                        }
 
-                    @Override
-                    public void retryFetchingMoreComments() {
-                        isLoadingMoreChildren = false;
-                        loadMoreChildrenSuccess = true;
+                        @Override
+                        public void retryFetchingMoreComments() {
+                            isLoadingMoreChildren = false;
+                            loadMoreChildrenSuccess = true;
+
+                            fetchMoreComments();
+                        }
+                    });
+            mRecyclerView.setAdapter(mAdapter);
 
+            if(savedInstanceState != null) {
+                isRefreshing = savedInstanceState.getBoolean(IS_REFRESHING_STATE);
+                if(isRefreshing) {
+                    isRefreshing = false;
+                    refresh();
+                } else {
+                    mAdapter.addComments(savedInstanceState.getParcelableArrayList(COMMENTS_STATE),
+                            savedInstanceState.getBoolean(HAS_MORE_CHILDREN_STATE));
+                    isLoadingMoreChildren = savedInstanceState.getBoolean(IS_LOADING_MORE_CHILDREN_STATE);
+                    children = savedInstanceState.getStringArrayList(MORE_CHILDREN_LIST_STATE);
+                    mChildrenStartingIndex = savedInstanceState.getInt(MORE_CHILDREN_STARTING_INDEX_STATE);
+                    if(isLoadingMoreChildren) {
+                        isLoadingMoreChildren = false;
                         fetchMoreComments();
                     }
-                });
-        mRecyclerView.setAdapter(mAdapter);
-
-        if(savedInstanceState != null) {
-            isRefreshing = savedInstanceState.getBoolean(IS_REFRESHING_STATE);
-            if(isRefreshing) {
-                isRefreshing = false;
-                refresh();
-            } else {
-                mAdapter.addComments(savedInstanceState.getParcelableArrayList(COMMENTS_STATE),
-                        savedInstanceState.getBoolean(HAS_MORE_CHILDREN_STATE));
-                isLoadingMoreChildren = savedInstanceState.getBoolean(IS_LOADING_MORE_CHILDREN_STATE);
-                children = savedInstanceState.getStringArrayList(MORE_CHILDREN_LIST_STATE);
-                mChildrenStartingIndex = savedInstanceState.getInt(MORE_CHILDREN_STARTING_INDEX_STATE);
-                if(isLoadingMoreChildren) {
-                    isLoadingMoreChildren = false;
-                    fetchMoreComments();
                 }
+            } else {
+                fetchComment();
             }
-        } else {
-            fetchComment();
         }
 
         if(getIntent().hasExtra(EXTRA_POST_LIST_POSITION)) {
@@ -153,6 +171,98 @@ public class ViewPostDetailActivity extends AppCompatActivity {
         }
     }
 
+    private void fetchPostAndCommentsById(String subredditId) {
+        mFetchPostInfoLinearLayout.setVisibility(View.GONE);
+        mGlide.clear(mFetchPostInfoImageView);
+
+        String accessToken = getSharedPreferences(SharedPreferencesUtils.AUTH_CODE_FILE_KEY, Context.MODE_PRIVATE)
+                .getString(SharedPreferencesUtils.ACCESS_TOKEN_KEY, "");
+
+        RedditAPI api = mOauthRetrofit.create(RedditAPI.class);
+        Call<String> postAndComments = api.getPostAndCommentsById(subredditId, RedditUtils.getOAuthHeader(accessToken));
+        postAndComments.enqueue(new Callback<String>() {
+            @Override
+            public void onResponse(@NonNull Call<String> call, @NonNull Response<String> response) {
+                mProgressBar.setVisibility(View.GONE);
+
+                if(response.isSuccessful()) {
+                    ParsePost.parsePost(response.body(), mLocale, new ParsePost.ParsePostListener() {
+                        @Override
+                        public void onParsePostSuccess(Post post) {
+                            mPost = post;
+
+                            mAdapter = new CommentAndPostRecyclerViewAdapter(ViewPostDetailActivity.this, mRetrofit,
+                                    mOauthRetrofit, mGlide, mSharedPreferences, mPost,
+                                    mPost.getSubredditNamePrefixed(), mLocale, mLoadSubredditIconAsyncTask,
+                                    new CommentAndPostRecyclerViewAdapter.CommentRecyclerViewAdapterCallback() {
+                                        @Override
+                                        public void updatePost(Post post) {
+                                            EventBus.getDefault().post(new PostUpdateEventToPostList(mPost, postListPosition));
+                                        }
+
+                                        @Override
+                                        public void retryFetchingMoreComments() {
+                                            isLoadingMoreChildren = false;
+                                            loadMoreChildrenSuccess = true;
+
+                                            fetchMoreComments();
+                                        }
+                                    });
+                            mRecyclerView.setAdapter(mAdapter);
+
+                            ParseComment.parseComment(response.body(), new ArrayList<>(), mLocale,
+                                    new ParseComment.ParseCommentListener() {
+                                        @Override
+                                        public void onParseCommentSuccess(ArrayList<CommentData> expandedComments, String parentId, ArrayList<String> moreChildrenFullnames) {
+                                            ViewPostDetailActivity.this.children = moreChildrenFullnames;
+
+                                            hasMoreChildren = children.size() != 0;
+                                            mAdapter.addComments(expandedComments, hasMoreChildren);
+
+                                            if(children.size() > 0) {
+                                                mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
+                                                    @Override
+                                                    public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {
+                                                        super.onScrolled(recyclerView, dx, dy);
+
+                                                        if(!isLoadingMoreChildren && loadMoreChildrenSuccess) {
+                                                            int visibleItemCount = mLinearLayoutManager.getChildCount();
+                                                            int totalItemCount = mLinearLayoutManager.getItemCount();
+                                                            int firstVisibleItemPosition = mLinearLayoutManager.findFirstVisibleItemPosition();
+
+                                                            if ((visibleItemCount + firstVisibleItemPosition >= totalItemCount) && firstVisibleItemPosition >= 0) {
+                                                                fetchMoreComments();
+                                                            }
+                                                        }
+                                                    }
+                                                });
+                                            }
+                                        }
+
+                                        @Override
+                                        public void onParseCommentFailed() {
+                                            mAdapter.initiallyLoadCommentsFailed();
+                                        }
+                                    });
+                        }
+
+                        @Override
+                        public void onParsePostFail() {
+                            showErrorView(subredditId);
+                        }
+                    });
+                } else {
+                    showErrorView(subredditId);
+                }
+            }
+
+            @Override
+            public void onFailure(@NonNull Call<String> call, @NonNull Throwable t) {
+                showErrorView(subredditId);
+            }
+        });
+    }
+
     private void fetchComment() {
         mAdapter.initiallyLoading();
 
@@ -224,6 +334,9 @@ public class ViewPostDetailActivity extends AppCompatActivity {
             isRefreshing = true;
             mChildrenStartingIndex = 0;
 
+            mFetchPostInfoLinearLayout.setVisibility(View.GONE);
+            mGlide.clear(mFetchPostInfoImageView);
+
             fetchComment();
 
             String accessToken = getSharedPreferences(SharedPreferencesUtils.AUTH_CODE_FILE_KEY, Context.MODE_PRIVATE)
@@ -247,6 +360,14 @@ public class ViewPostDetailActivity extends AppCompatActivity {
         }
     }
 
+    private void showErrorView(String subredditId) {
+        mProgressBar.setVisibility(View.GONE);
+        mFetchPostInfoLinearLayout.setVisibility(View.VISIBLE);
+        mFetchPostInfoLinearLayout.setOnClickListener(view -> fetchPostAndCommentsById(subredditId));
+        mFetchPostInfoTextView.setText(R.string.error_loading_post);
+        mGlide.load(R.drawable.load_post_error_indicator).into(mFetchPostInfoImageView);
+    }
+
     @Subscribe
     public void onPostUpdateEvent(PostUpdateEventToDetailActivity event) {
         if(mPost.getId().equals(event.postId)) {
diff --git a/app/src/main/res/layout/activity_view_post_detail.xml b/app/src/main/res/layout/activity_view_post_detail.xml
index 7416ed7a..11f5ce1e 100644
--- a/app/src/main/res/layout/activity_view_post_detail.xml
+++ b/app/src/main/res/layout/activity_view_post_detail.xml
@@ -21,10 +21,38 @@
 
     </com.google.android.material.appbar.AppBarLayout>
 
+    <ProgressBar
+        android:id="@+id/progress_bar_view_post_detail_activity"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center" />
+
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/recycler_view_view_post_detail"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         app:layout_behavior="@string/appbar_scrolling_view_behavior" />
 
+    <LinearLayout
+        android:id="@+id/fetch_post_info_linear_layout_view_post_detail_activity"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:visibility="gone">
+
+        <ImageView
+            android:id="@+id/fetch_post_info_image_view_view_post_detail_activity"
+            android:layout_width="150dp"
+            android:layout_height="wrap_content" />
+
+        <TextView
+            android:id="@+id/fetch_post_info_text_view_view_post_detail_activity"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:gravity="center" />
+
+    </LinearLayout>
+
 </androidx.coordinatorlayout.widget.CoordinatorLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_view_user_detail.xml b/app/src/main/res/layout/activity_view_user_detail.xml
index 67beecd2..bbdf6603 100644
--- a/app/src/main/res/layout/activity_view_user_detail.xml
+++ b/app/src/main/res/layout/activity_view_user_detail.xml
@@ -10,7 +10,7 @@
     <androidx.viewpager.widget.ViewPager
         android:id="@+id/view_pager_view_user_detail_activity"
         android:layout_width="match_parent"
-        android:layout_height="match_parent"
+        android:layout_height="wrap_content"
         app:layout_behavior="@string/appbar_scrolling_view_behavior" />
 
     <com.google.android.material.appbar.AppBarLayout
@@ -114,6 +114,4 @@
 
     </com.google.android.material.appbar.AppBarLayout>
 
-    <!--<include layout="@layout/content_view_user_detail" />-->
-
 </androidx.coordinatorlayout.widget.CoordinatorLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/item_comment.xml b/app/src/main/res/layout/item_comment.xml
index d03b0bad..d949904a 100644
--- a/app/src/main/res/layout/item_comment.xml
+++ b/app/src/main/res/layout/item_comment.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <com.google.android.material.card.MaterialCardView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/card_view_item_comment"
     android:layout_width="match_parent"
     android:layout_height="wrap_content">
 
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 76e3f626..5d8904e4 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -131,4 +131,6 @@
 
     <string name="search_in">Search in</string>
     <string name="all_subreddits">All subreddits</string>
+
+    <string name="error_loading_post">Error loading this post.\nTap to retry.</string>
 </resources>