Allow FDL plugin to be registered without an activity (#1835)

Author: mehmetf

packages/firebase_dynamic_links/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.4.0+5
+
+* Fix the bug below properly by allowing the activity to be null (but still registering the plugin). If activity is null, we don't get a latestIntent, instead we expect the intent listener to grab it.
+
 ## 0.4.0+4
 
 * Fixed bug on Android when a headless plugin tries to register this plugin causing a crash due no activity from the registrar.

packages/firebase_dynamic_links/android/src/main/java/io/flutter/plugins/firebasedynamiclinks/FirebaseDynamicLinksPlugin.java

@@ -28,7 +28,9 @@ public class FirebaseDynamicLinksPlugin implements MethodCallHandler {
 
   private FirebaseDynamicLinksPlugin(Registrar registrar) {
     this.registrar = registrar;
-    latestIntent = registrar.activity().getIntent();
+    if (registrar.activity() != null) {
+      latestIntent = registrar.activity().getIntent();
+    }
 
     registrar.addNewIntentListener(
         new PluginRegistry.NewIntentListener() {
@@ -41,9 +43,6 @@ public boolean onNewIntent(Intent intent) {
   }
 
   public static void registerWith(Registrar registrar) {
-    if (registrar.activity() == null) {
-      return;
-    }
     final MethodChannel channel =
         new MethodChannel(registrar.messenger(), "plugins.flutter.io/firebase_dynamic_links");
     channel.setMethodCallHandler(new FirebaseDynamicLinksPlugin(registrar));

packages/firebase_dynamic_links/pubspec.yaml

@@ -1,7 +1,7 @@
 name: firebase_dynamic_links
 description: Flutter plugin for Google Dynamic Links for Firebase, an app solution for creating
   and handling links across multiple platforms.
-version: 0.4.0+4
+version: 0.4.0+5
 
 author: Flutter Team <flutter-dev@googlegroups.com>
 homepage: https://github.com/flutter/plugins/tree/master/packages/firebase_dynamic_links