Fixed deep link error handling.

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

@@ -1,14 +1,20 @@
 package ml.docilealligator.infinityforreddit;
 
 import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
 import android.net.Uri;
 import android.os.Bundle;
+import android.widget.Toast;
 
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.browser.customtabs.CustomTabsIntent;
 
+import java.util.ArrayList;
 import java.util.List;
 
+import static androidx.browser.customtabs.CustomTabsService.ACTION_CUSTOM_TABS_CONNECTION;
+
 public class LinkResolverActivity extends AppCompatActivity {
 
     private static final String POST_PATTERN = "/r/\\w+/comments/\\w+/*[\\w+]*/*";
@@ -58,12 +64,56 @@ public class LinkResolverActivity extends AppCompatActivity {
     }
 
     private void deepLinkError(Uri uri) {
-        //Deep link error handling
+        PackageManager pm = getPackageManager();
-        CustomTabsIntent.Builder builder = new CustomTabsIntent.Builder();
+        ArrayList<ResolveInfo> resolveInfos = getCustomTabsPackages(pm);
-        // add share action to menu list
+        if(!resolveInfos.isEmpty()) {
-        builder.addDefaultShareMenuItem();
+            CustomTabsIntent.Builder builder = new CustomTabsIntent.Builder();
-        builder.setToolbarColor(getResources().getColor(R.color.colorPrimary));
+            // add share action to menu list
-        CustomTabsIntent customTabsIntent = builder.build();
+            builder.addDefaultShareMenuItem();
-        customTabsIntent.launchUrl(this, uri);
+            builder.setToolbarColor(getResources().getColor(R.color.colorPrimary));
+            CustomTabsIntent customTabsIntent = builder.build();
+            customTabsIntent.intent.setPackage(resolveInfos.get(0).activityInfo.packageName);
+            customTabsIntent.launchUrl(this, uri);
+        } else {
+            Intent intent = new Intent(Intent.ACTION_VIEW);
+            intent.setData(uri);
+
+            List<ResolveInfo> activities = pm.queryIntentActivities(intent, 0);
+            ArrayList<String> packageNames = new ArrayList<>();
+
+            String currentPackageName = getApplicationContext().getPackageName();
+
+            for(ResolveInfo info : activities) {
+                if(!info.activityInfo.packageName.equals(currentPackageName)) {
+                    packageNames.add(info.activityInfo.packageName);
+                }
+            }
+
+            if(!packageNames.isEmpty()) {
+                intent.setPackage(packageNames.get(0));
+                startActivity(intent);
+            } else {
+                Toast.makeText(this, R.string.no_browser_found, Toast.LENGTH_SHORT).show();
+            }
+        }
+    }
+
+    private ArrayList<ResolveInfo> getCustomTabsPackages(PackageManager pm) {
+        // Get default VIEW intent handler.
+        Intent activityIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("https://www.example.com"));
+
+        // Get all apps that can handle VIEW intents.
+        List<ResolveInfo> resolvedActivityList = pm.queryIntentActivities(activityIntent, 0);
+        ArrayList<ResolveInfo> packagesSupportingCustomTabs = new ArrayList<>();
+        for (ResolveInfo info : resolvedActivityList) {
+            Intent serviceIntent = new Intent();
+            serviceIntent.setAction(ACTION_CUSTOM_TABS_CONNECTION);
+            serviceIntent.setPackage(info.activityInfo.packageName);
+            // Check if this package also resolves the Custom Tabs service.
+            if (pm.resolveService(serviceIntent, 0) != null) {
+                packagesSupportingCustomTabs.add(info);
+            }
+        }
+        return packagesSupportingCustomTabs;
     }
 }

app/src/main/java/ml/docilealligator/infinityforreddit/ViewUserDetailActivity.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;
@@ -14,7 +13,6 @@ 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;
@@ -31,8 +29,6 @@ import com.google.android.material.chip.Chip;
 import com.google.android.material.snackbar.Snackbar;
 import com.google.android.material.tabs.TabLayout;
 
-import java.util.List;
-
 import javax.inject.Inject;
 import javax.inject.Named;
 
@@ -75,7 +71,6 @@ public class ViewUserDetailActivity extends AppCompatActivity {
     private AppBarLayout.LayoutParams params;
 
     private String userName;
-    private Uri userUri;
     private boolean subscriptionReady = false;
     private boolean isInLazyMode = false;
     private int colorPrimary;
@@ -111,26 +106,7 @@ public class ViewUserDetailActivity extends AppCompatActivity {
             statusBarHeight = getResources().getDimensionPixelSize(resourceId);
         }
 
-        if(getIntent().getData() != null) {
+        userName = getIntent().getExtras().getString(EXTRA_USER_NAME_KEY);
-            userUri = getIntent().getData();
-            List<String> segments = userUri.getPathSegments();
-            int userIndex = segments.indexOf("user");
-            if(userIndex >= 0 && userIndex < segments.size() - 1) {
-                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);
-        }
-
         String title = "u/" + userName;
         userNameTextView.setText(title);
 

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

@@ -146,4 +146,7 @@
     <string name="sort_relevance">Relevance</string>
     <string name="sort_comments">Comments</string>
     <string name="sort_activity">Activity</string>
+
+    <string name="open_link_with">Open link with</string>
+    <string name="no_browser_found">No browser found</string>
 </resources>