Create LinkResolverActivity to resolve the reddit links instead of resolving them in different activities. Deep link error handling is still broken.

app/src/main/AndroidManifest.xml

@@ -19,6 +19,18 @@
         android:supportsRtl="true"
         android:theme="@style/AppTheme"
         android:usesCleartextTraffic="true">
+        <activity android:name=".LinkResolverActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.VIEW" />
+
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.BROWSABLE" />
+
+                <data
+                    android:host="www.reddit.com"
+                    android:scheme="https" />
+            </intent-filter>
+        </activity>
         <activity
             android:name=".SearchActivity"
             android:label="@string/search_activity_label"
@@ -73,6 +85,7 @@
             android:theme="@style/AppTheme.NoActionBarWithTransparentStatusBar">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
+
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
@@ -91,42 +104,15 @@
         <activity
             android:name=".ViewPostDetailActivity"
             android:parentActivityName=".MainActivity"
-            android:theme="@style/AppTheme.NoActionBar">
+            android:theme="@style/AppTheme.NoActionBar" />
-            <intent-filter>
-                <action android:name="android.intent.action.VIEW" />
-                <category android:name="android.intent.category.DEFAULT" />
-                <category android:name="android.intent.category.BROWSABLE" />
-                <data android:scheme="https"
-                    android:host="www.reddit.com"
-                    android:pathPattern="/r/..*/comments/..*"/>
-            </intent-filter>
-        </activity>
         <activity
             android:name=".ViewSubredditDetailActivity"
             android:parentActivityName=".MainActivity"
-            android:theme="@style/AppTheme.NoActionBarWithTranslucentWindow">
+            android:theme="@style/AppTheme.NoActionBarWithTranslucentWindow" />
-            <intent-filter>
-                <action android:name="android.intent.action.VIEW" />
-                <category android:name="android.intent.category.DEFAULT" />
-                <category android:name="android.intent.category.BROWSABLE" />
-                <data android:scheme="https"
-                    android:host="www.reddit.com"
-                    android:pathPattern="/r/..*"/>
-            </intent-filter>
-        </activity>
         <activity
             android:name=".ViewUserDetailActivity"
             android:parentActivityName=".MainActivity"
-            android:theme="@style/AppTheme.NoActionBarWithTranslucentWindow">
+            android:theme="@style/AppTheme.NoActionBarWithTranslucentWindow" />
-            <intent-filter>
-                <action android:name="android.intent.action.VIEW" />
-                <category android:name="android.intent.category.DEFAULT" />
-                <category android:name="android.intent.category.BROWSABLE" />
-                <data android:scheme="https"
-                    android:host="www.reddit.com"
-                    android:pathPattern="/user/..*"/>
-            </intent-filter>
-        </activity>
 
         <provider
             android:name="androidx.core.content.FileProvider"
@@ -135,8 +121,7 @@
             android:grantUriPermissions="true">
             <meta-data
                 android:name="android.support.FILE_PROVIDER_PATHS"
-                android:resource="@xml/file_paths">
+                android:resource="@xml/file_paths" />
-            </meta-data>
         </provider>
     </application>
 

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

@@ -0,0 +1,69 @@
+package ml.docilealligator.infinityforreddit;
+
+import android.content.Intent;
+import android.net.Uri;
+import android.os.Bundle;
+
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.browser.customtabs.CustomTabsIntent;
+
+import java.util.List;
+
+public class LinkResolverActivity extends AppCompatActivity {
+
+    private static final String POST_PATTERN = "/r/\\w+/comments/\\w+/*[\\w+]*/*";
+    private static final String SUBREDDIT_PATTERN = "/r/\\w+/*";
+    private static final String USER_PATTERN = "/user/\\w+/*";
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        Uri uri = getIntent().getData();
+        String path = uri.getPath();
+        if(path.endsWith("/")) {
+            path = path.substring(0, path.length() - 1);
+        }
+
+        if(path.matches(POST_PATTERN)) {
+            List<String> segments = uri.getPathSegments();
+            int commentsIndex = segments.lastIndexOf("comments");
+            if(commentsIndex >=0 && commentsIndex < segments.size() - 1) {
+                Intent intent = new Intent(this, ViewPostDetailActivity.class);
+                intent.putExtra(ViewPostDetailActivity.EXTRA_POST_ID, segments.get(commentsIndex + 1));
+                startActivity(intent);
+            } else {
+                deepLinkError(uri);
+            }
+        } else if(path.matches(SUBREDDIT_PATTERN)) {
+            String subredditName = path.substring(3);
+            if(subredditName.equals("popular") || subredditName.equals("all")) {
+                Intent intent = new Intent(this, MainActivity.class);
+                intent.putExtra(MainActivity.EXTRA_POST_TYPE, subredditName);
+                startActivity(intent);
+            } else {
+                Intent intent = new Intent(this, ViewSubredditDetailActivity.class);
+                intent.putExtra(ViewSubredditDetailActivity.EXTRA_SUBREDDIT_NAME_KEY, path.substring(3));
+                startActivity(intent);
+            }
+        } else if(path.matches(USER_PATTERN)) {
+            Intent intent = new Intent(this, ViewUserDetailActivity.class);
+            intent.putExtra(ViewUserDetailActivity.EXTRA_USER_NAME_KEY, path.substring(6));
+            startActivity(intent);
+        } else {
+            deepLinkError(uri);
+        }
+
+        finish();
+    }
+
+    private void deepLinkError(Uri uri) {
+        //Deep link error handling
+        CustomTabsIntent.Builder builder = new CustomTabsIntent.Builder();
+        // add share action to menu list
+        builder.addDefaultShareMenuItem();
+        builder.setToolbarColor(getResources().getColor(R.color.colorPrimary));
+        CustomTabsIntent customTabsIntent = builder.build();
+        customTabsIntent.launchUrl(this, uri);
+    }
+}

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

@@ -3,7 +3,6 @@ package ml.docilealligator.infinityforreddit;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
-import android.net.Uri;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.Menu;
@@ -33,7 +32,6 @@ import org.greenrobot.eventbus.EventBus;
 import org.greenrobot.eventbus.Subscribe;
 
 import java.util.ArrayList;
-import java.util.List;
 import java.util.Locale;
 
 import javax.inject.Inject;
@@ -64,8 +62,6 @@ public class ViewPostDetailActivity extends AppCompatActivity {
     @State
     Post mPost;
     @State
-    Uri postUri;
-    @State
     boolean isLoadingMoreChildren = false;
     @State
     boolean isRefreshing = false;
@@ -126,17 +122,13 @@ public class ViewPostDetailActivity extends AppCompatActivity {
         orientation = getResources().getConfiguration().orientation;
 
         if(mPost == null) {
-            if(getIntent().getData() != null) {
-                postUri = getIntent().getData();
-            } else {
             mPost = getIntent().getExtras().getParcelable(EXTRA_POST_DATA);
         }
-        }
 
-        if(postUri == null && mPost == null) {
+        if(mPost == null) {
             mProgressBar.setVisibility(View.VISIBLE);
             fetchPostAndCommentsById(getIntent().getExtras().getString(EXTRA_POST_ID));
-        } else if(mPost != null) {
+        } else {
             mAdapter = new CommentAndPostRecyclerViewAdapter(ViewPostDetailActivity.this, mRetrofit,
                     mOauthRetrofit, mGlide, mSharedPreferences, mPost,
                     mPost.getSubredditNamePrefixed(), mLocale, mLoadSubredditIconAsyncTask,
@@ -170,17 +162,6 @@ public class ViewPostDetailActivity extends AppCompatActivity {
                     }
                 }
             }
-        } else {
-            mProgressBar.setVisibility(View.VISIBLE);
-            List<String> segments = postUri.getPathSegments();
-            int commentIndex = segments.indexOf("comments");
-            if(commentIndex >= 0 || commentIndex != segments.size() - 1) {
-                mProgressBar.setVisibility(View.VISIBLE);
-                fetchPostAndCommentsById(segments.get(commentIndex + 1));
-            } else {
-                //Deep link error handling
-                finish();
-            }
         }
 
         if(getIntent().hasExtra(EXTRA_POST_LIST_POSITION)) {

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

@@ -2,7 +2,6 @@ package ml.docilealligator.infinityforreddit;
 
 import android.content.Intent;
 import android.content.SharedPreferences;
-import android.net.Uri;
 import android.os.AsyncTask;
 import android.os.Bundle;
 import android.view.Menu;
@@ -27,8 +26,6 @@ import com.google.android.material.chip.Chip;
 import com.google.android.material.floatingactionbutton.FloatingActionButton;
 import com.google.android.material.snackbar.Snackbar;
 
-import java.util.List;
-
 import javax.inject.Inject;
 import javax.inject.Named;
 
@@ -66,7 +63,6 @@ public class ViewSubredditDetailActivity extends AppCompatActivity implements So
     @BindView(R.id.fab_view_subreddit_detail_activity) FloatingActionButton fab;
 
     private String subredditName;
-    private Uri subredditUri;
     private boolean subscriptionReady = false;
     private boolean isInLazyMode = false;
 
@@ -117,26 +113,7 @@ public class ViewSubredditDetailActivity extends AppCompatActivity implements So
             statusBarHeight = getResources().getDimensionPixelSize(resourceId);
         }
 
-        if(getIntent().getData() != null) {
-            subredditUri = getIntent().getData();
-            List<String> segments = subredditUri.getPathSegments();
-            int rIndex = segments.indexOf("r");
-            if(rIndex >= 0 && rIndex < segments.size() - 1) {
-                subredditName = segments.get(rIndex + 1);
-                if(subredditName.equals("popular") || subredditName.equals("all")) {
-                    Intent intent = new Intent(this, MainActivity.class);
-                    intent.putExtra(MainActivity.EXTRA_POST_TYPE, subredditName);
-                    startActivity(intent);
-                    finish();
-                }
-            } else {
-                //Deep link error handling
-                finish();
-            }
-        } else {
         subredditName = getIntent().getExtras().getString(EXTRA_SUBREDDIT_NAME_KEY);
-        }
-
         String title = "r/" + subredditName;
         subredditNameTextView.setText(title);
 

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

@@ -14,6 +14,7 @@ import android.widget.TextView;
 import androidx.annotation.NonNull;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.widget.Toolbar;
+import androidx.browser.customtabs.CustomTabsIntent;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
 import androidx.fragment.app.Fragment;
 import androidx.fragment.app.FragmentManager;
@@ -118,7 +119,13 @@ public class ViewUserDetailActivity extends AppCompatActivity {
                 userName = segments.get(userIndex + 1);
             } else {
                 //Deep link error handling
+                CustomTabsIntent.Builder builder = new CustomTabsIntent.Builder();
+                builder.addDefaultShareMenuItem();
+                builder.setToolbarColor(getResources().getColor(R.color.colorPrimary));
+                CustomTabsIntent customTabsIntent = builder.build();
+                customTabsIntent.launchUrl(this, userUri);
                 finish();
+                return;
             }
         } else {
             userName = getIntent().getExtras().getString(EXTRA_USER_NAME_KEY);