Merge pull request #112 from aryaveerruno/flutter_view

added Flutter view in window manager

Author: pvsvamsi

README.md

@@ -44,10 +44,69 @@ Displays as a notification in the notification center [Help Needed]
 
 ## Example
 
-### Request overlay permission
+#### Show Overlay
+
+#### Request overlay permission
       await SystemAlertWindow.requestPermissions;
 
-### Show the overlay
+### Inside `main.dart` create an entry point for your Overlay widget;
+```dart
+// overlay entry point
+@pragma("vm:entry-point")
+void overlayMain() {
+  runApp(const MaterialApp(
+    debugShowCheckedModeBanner: false,
+    home: Material(child: Text("My overlay"))
+  ));
+}
+
+
+ //Open overLay content
+
+//  - Optional arguments:
+/// `gravity` Position of the window and default is [SystemWindowGravity.CENTER]
+/// `width` Width of the window and default is [Constants.MATCH_PARENT]
+/// `height` Height of the window and default is [Constants.WRAP_CONTENT]
+/// `notificationTitle` Notification title, applicable in case of bubble
+/// `notificationBody` Notification body, applicable in case of bubble
+/// `prefMode` Preference for the system window. Default is [SystemWindowPrefMode.DEFAULT]
+/// `isDisableClicks` Disables the clicks across the system window. Default is false. This is not applicable for bubbles.
+await SystemAlertWindow.showSystemWindow();
+
+ // closes overlay if open
+await SystemAlertWindow.closeSystemWindow();
+
+ // broadcast data to and from overlay app
+await SystemAlertWindow.sendMessageToOverlay("Hello from the other side");
+
+ //streams message shared between overlay and main app
+SystemAlertWindow.overlayListener.listen((event) {
+log("Current Event: $event");
+});
+
+//to add custom logs in log file
+SystemAlertWindow.addCustomLog("add custom log")
+
+
+/// update the overlay flag while the overlay in action
+///   - Optional arguments:
+/// `gravity` Position of the window and default is [SystemWindowGravity.CENTER]
+/// `width` Width of the window and default is [Constants.MATCH_PARENT]
+/// `height` Height of the window and default is [Constants.WRAP_CONTENT]
+/// `notificationTitle` Notification title, applicable in case of bubble
+/// `notificationBody` Notification body, applicable in case of bubble
+/// `prefMode` Preference for the system window. Default is [SystemWindowPrefMode.DEFAULT]
+/// `isDisableClicks` Disables the clicks across the system window. Default is false. This is not applicable for bubbles.
+await FlutterOverlayWindow.updateSystemWindow();
+
+```
+
+### Close the overlay
+      SystemAlertWindow.closeSystemWindow();
+
+
+
+#### Show the Bubble 
           
       SystemWindowHeader header = SystemWindowHeader(
           title: SystemWindowText(text: "Incoming Call", fontSize: 10, textColor: Colors.black45),
@@ -111,7 +170,7 @@ Displays as a notification in the notification center [Help Needed]
           //Using SystemWindowPrefMode.OVERLAY forces overlay window instead of bubble in Android 11.
           //Using SystemWindowPrefMode.BUBBLE forces Bubble instead of overlay window in Android 10 & above
           
-### Register for onClick events (button click)
+#### Register for onClick events (button click)
 
       SystemAlertWindow.registerOnClickListener(callBackFunction);
 
@@ -136,12 +195,9 @@ Displays as a notification in the notification center [Help Needed]
         }
       }
           
-### Close the overlay
 
-      SystemAlertWindow.closeSystemWindow();
-      
-### Isolate communication
-##### Use this snippet, if you want the callbacks on your main thread, instead of handling them in an isolate (like mentioned above)
+#### Isolate communication
+###### Use this snippet, if you want the callbacks on your main thread, instead of handling them in an isolate (like mentioned above)
 
 ###### Create an isolate_manager.dart
 ```
@@ -193,7 +249,7 @@ class IsolateManager{
     SystemAlertWindow.registerOnClickListener(callBackFunction);
 ```
 
-###### Now the callBackFunction should looks like 
+###### Now the callBackFunction should looks like
 ```
 bool callBackFunction(String tag) {
   print("Got tag " + tag);
@@ -202,3 +258,7 @@ bool callBackFunction(String tag) {
   return true;
 }
 ```
+
+
+      
+

android/src/main/java/in/jvapps/system_alert_window/SystemAlertWindowPlugin.java

@@ -1,22 +1,36 @@
 package in.jvapps.system_alert_window;
 
+import android.content.Context;
+
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
+import in.jvapps.system_alert_window.utils.Commons;
+import in.jvapps.system_alert_window.utils.Constants;
 import in.jvapps.system_alert_window.utils.ContextHolder;
 import in.jvapps.system_alert_window.utils.LogUtils;
+import io.flutter.FlutterInjector;
+import io.flutter.embedding.engine.FlutterEngine;
+import io.flutter.embedding.engine.FlutterEngineCache;
+import io.flutter.embedding.engine.FlutterEngineGroup;
+import io.flutter.embedding.engine.dart.DartExecutor;
 import io.flutter.embedding.engine.plugins.FlutterPlugin;
 import io.flutter.embedding.engine.plugins.activity.ActivityAware;
 import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding;
+import io.flutter.plugin.common.BasicMessageChannel;
+import io.flutter.plugin.common.JSONMessageCodec;
 
-public class SystemAlertWindowPlugin implements FlutterPlugin, ActivityAware {
+public class SystemAlertWindowPlugin implements FlutterPlugin, ActivityAware,BasicMessageChannel.MessageHandler {
 
     private boolean isInitialized;
 
     @Nullable
     private ActivityPluginBinding pluginBinding;
     MethodCallHandlerImpl methodCallHandler;
     private final String TAG = "SAW:Plugin";
+    private Context context;
+    private BasicMessageChannel<Object> messenger;
+
 
     public SystemAlertWindowPlugin() {
         LogUtils.getInstance().d(TAG, "Initializing the constructor");
@@ -60,7 +74,12 @@ private void dispose() {
 
     @Override
     public void onAttachedToEngine(@NonNull FlutterPluginBinding flutterPluginBinding) {
+        this.context = flutterPluginBinding.getApplicationContext();
         initialize(flutterPluginBinding);
+        messenger = new BasicMessageChannel<>(flutterPluginBinding.getBinaryMessenger(), Constants.MESSAGE_CHANNEL,
+                JSONMessageCodec.INSTANCE);
+        messenger.setMessageHandler(this);
+        Commons.messenger = messenger;
     }
 
     @Override
@@ -78,6 +97,13 @@ public void onAttachedToActivity(@NonNull ActivityPluginBinding activityPluginBi
         LogUtils.getInstance().d(TAG, "Initializing on attached to activity");
         if (methodCallHandler != null) {
             methodCallHandler.setActivity(activityPluginBinding.getActivity());
+            FlutterEngineGroup enn = new FlutterEngineGroup(context);
+            DartExecutor.DartEntrypoint dEntry = new DartExecutor.DartEntrypoint(
+                    FlutterInjector.instance().flutterLoader().findAppBundlePath(),
+                    "overlayMain");
+            FlutterEngine engine = enn.createAndRunEngine(context, dEntry);
+            FlutterEngineCache.getInstance().put(Constants.FLUTTER_CACHE_ENGINE, engine);
+
         }
         this.pluginBinding = activityPluginBinding;
         registerListeners();
@@ -101,4 +127,13 @@ public void onDetachedFromActivity() {
         }
         deregisterListeners();
     }
+
+    @Override
+    public void onMessage(@Nullable Object message, @NonNull BasicMessageChannel.Reply reply) {
+        BasicMessageChannel overlayMessageChannel = new BasicMessageChannel(
+                FlutterEngineCache.getInstance().get(Constants.FLUTTER_CACHE_ENGINE)
+                        .getDartExecutor(),
+                Constants.MESSAGE_CHANNEL, JSONMessageCodec.INSTANCE);
+        overlayMessageChannel.send(message, reply);
+    }
 }