Feat: Android suuport requestFocus function

Author: lanistor

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/webview/InAppWebViewInterface.java

@@ -81,6 +81,7 @@ void loadDataWithBaseURL(String baseUrl, String data,
   boolean zoomIn();
   boolean zoomOut();
   void clearFocus();
+  void requestFocusView(); // For requestFocus
   Map<String, Object> requestFocusNodeHref();
   Map<String, Object> requestImageRef();
   int getScrollX();

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/webview/WebViewChannelDelegate.java

@@ -483,6 +483,13 @@ public void onReceiveValue(String value) {
         }
         result.success(true);
         break;
+      case requestFocus:
+        if (webView != null) {
+          webView.requestFocusView();
+        } else {
+          result.success(true);
+        }
+        break;
       case requestFocusNodeHref:
         if (webView != null) {
           result.success(webView.requestFocusNodeHref());

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/webview/WebViewChannelDelegateMethods.java

@@ -60,6 +60,7 @@ public enum WebViewChannelDelegateMethods {
   zoomOut,
   clearFocus,
   setContextMenu,
+  requestFocus,
   requestFocusNodeHref,
   requestImageRef,
   getScrollX,

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/webview/in_app_webview/InAppWebView.java

@@ -1719,6 +1719,16 @@ public void onReceiveValue(String value) {
     });
   }
 
+  public void requestFocusView() {
+    requestFocus();
+    InputMethodManager inputManager =
+                (InputMethodManager) this.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
+    if (inputManager != null) {
+      inputManager.toggleSoftInput(InputMethodManager.SHOW_FORCED,
+              InputMethodManager.HIDE_IMPLICIT_ONLY);
+    }
+  }
+
   public Map<String, Object> requestFocusNodeHref() {
     Message msg = InAppWebView.mHandler.obtainMessage();
     requestFocusNodeHref(msg);

lib/src/in_app_webview/apple/in_app_webview_options.dart

@@ -181,6 +181,7 @@ class IOSInAppWebViewOptions
   ///- [InAppWebViewController.pauseTimers]
   ///- [InAppWebViewController.getSelectedText]
   ///- [InAppWebViewController.getHitTestResult]
+  ///- [InAppWebViewController.requestFocus]
   ///- [InAppWebViewController.requestFocusNodeHref]
   ///- [InAppWebViewController.requestImageRef]
   ///- [InAppWebViewController.postWebMessage]

lib/src/in_app_webview/in_app_webview_controller.dart

@@ -2606,6 +2606,14 @@ class InAppWebViewController {
     _inAppBrowser?.contextMenu = contextMenu;
   }
 
+  /// Only support android.
+  ///
+  ///- Android issue: https://www.pudn.com/news/6228d8129ddf223e1ad224f8.html
+  Future<void> requestFocus() async {
+    Map<String, dynamic> args = <String, dynamic>{};
+    return await _channel.invokeMethod('requestFocus', args);
+  }
+
   ///Requests the anchor or image element URL at the last tapped point.
   ///
   ///**NOTE**: On iOS, it is implemented using JavaScript.

lib/src/in_app_webview/in_app_webview_settings.dart

@@ -1099,6 +1099,7 @@ class InAppWebViewSettings_ {
   ///- [InAppWebViewController.pauseTimers]
   ///- [InAppWebViewController.getSelectedText]
   ///- [InAppWebViewController.getHitTestResult]
+  ///- [InAppWebViewController.requestFocus]
   ///- [InAppWebViewController.requestFocusNodeHref]
   ///- [InAppWebViewController.requestImageRef]
   ///- [InAppWebViewController.postWebMessage]