Kotlin Flutter Poc

android/build.gradle

@@ -23,6 +23,8 @@ rootProject.allprojects {
 }
 
 apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android'
+apply plugin: 'kotlin-android-extensions'
 
 android {
     compileSdkVersion 31

android/src/main/java/com/pdftron/pdftronflutter/helpers/PluginMethodCallHandler.java

@@ -5,6 +5,7 @@
 import com.pdftron.common.PDFNetException;
 import com.pdftron.pdf.PDFNet;
 import com.pdftron.pdftronflutter.FlutterDocumentActivity;
+import com.pdftron.pdftronflutter.kotlin.MyToast;
 
 import io.flutter.plugin.common.BinaryMessenger;
 import io.flutter.plugin.common.EventChannel;
@@ -20,6 +21,7 @@
 import static com.pdftron.pdftronflutter.helpers.PluginUtils.FUNCTION_OPEN_DOCUMENT;
 import static com.pdftron.pdftronflutter.helpers.PluginUtils.FUNCTION_SET_LEADING_NAV_BUTTON_ICON;
 import static com.pdftron.pdftronflutter.helpers.PluginUtils.FUNCTION_SET_REQUESTED_ORIENTATION;
+import static com.pdftron.pdftronflutter.helpers.PluginUtils.FUNCTION_SHOW_MY_TOAST;
 import static com.pdftron.pdftronflutter.helpers.PluginUtils.KEY_CONFIG;
 import static com.pdftron.pdftronflutter.helpers.PluginUtils.KEY_DOCUMENT;
 import static com.pdftron.pdftronflutter.helpers.PluginUtils.KEY_LEADING_NAV_BUTTON_ICON;
@@ -316,6 +318,10 @@ public void onMethodCall(MethodCall call, Result result) {
                 FlutterDocumentActivity.setOrientation(requestedOrientation);
                 break;
             }
+            case FUNCTION_SHOW_MY_TOAST: {
+                MyToast.show(mContext);
+                break;
+            }
             default:
                 PluginUtils.onMethodCall(call, result, FlutterDocumentActivity.getCurrentActivity());
                 break;

android/src/main/java/com/pdftron/pdftronflutter/helpers/PluginUtils.java

@@ -354,6 +354,9 @@ public class PluginUtils {
     public static final String FUNCTION_SET_VERTICAL_SCROLL_POSITION = "setVerticalScrollPosition";
     public static final String FUNCTION_GET_VISIBLE_PAGES = "getVisiblePages";
 
+    // Kotlin Toast Method
+    public static final String FUNCTION_SHOW_MY_TOAST = "showMyToast";
+
     // Hygen Generated Method Constants
     public static final String FUNCTION_GET_ANNOTATIONS_ON_PAGE = "getAnnotationsOnPage";
 

android/src/main/java/com/pdftron/pdftronflutter/kotlin/MyToast.kt

@@ -0,0 +1,13 @@
+package com.pdftron.pdftronflutter.kotlin
+
+import android.content.Context
+import android.widget.Toast
+
+class MyToast {
+    companion object {
+        @JvmStatic
+        fun show(context: Context) {
+            Toast.makeText(context, "Kotlin API Called!!!", Toast.LENGTH_SHORT).show()
+        }
+    }
+}

example/android/app/build.gradle

@@ -22,6 +22,8 @@ if (flutterVersionName == null) {
 }
 
 apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
+apply plugin: 'kotlin-android-extensions'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {

example/android/build.gradle

@@ -1,11 +1,14 @@
 buildscript {
+    ext.kotlin_version = "1.6.20"
     repositories {
         google()
         mavenCentral()
     }
 
     dependencies {
         classpath 'com.android.tools.build:gradle:7.1.2'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+        classpath "org.jetbrains.kotlin:kotlin-android-extensions:$kotlin_version"
     }
 }
 

example/lib/main.dart

@@ -208,7 +208,7 @@ class _ViewerState extends State<Viewer> {
       // });
 
       // Show a dialog when leading navigation button is pressed.
-      _showMyDialog();
+      PdftronFlutter.showMyToast();
     });
 
     await controller.openDocument(_document, config: config);

lib/pdftron_flutter.dart

@@ -4,6 +4,7 @@ library pdftron;
 import 'dart:async';
 import 'dart:convert';
 
+import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 
 import 'src/options.dart';
@@ -24,7 +25,8 @@ class PdftronFlutter {
 
   /// The current version of the OS that the app is running on.
   static Future<String> get platformVersion async {
-    final String version = await _channel.invokeMethod(Functions.getPlatformVersion);
+    final String version =
+        await _channel.invokeMethod(Functions.getPlatformVersion);
     return version;
   }
 
@@ -43,6 +45,11 @@ class PdftronFlutter {
         <String, dynamic>{Parameters.licenseKey: licenseKey});
   }
 
+  /// Invokes Kotlin Toast API
+  static Future<void> showMyToast() {
+    return _channel.invokeMethod(Functions.showMyToast);
+  }
+
   /// Opens a document in the viewer with configurations.
   ///
   /// Uses the path specified by [document]. Takes a [password] for
@@ -603,7 +610,7 @@ class PdftronFlutter {
   static Future<void> exitSearchMode() {
     return _channel.invokeMethod(Functions.exitSearchMode);
   }
-  
+
   /// Zooms the viewer to the given scale using the given coordinate as the center.
   ///
   /// The zoom center ([x],[y]) is represented in the screen space, whose origin
@@ -612,7 +619,7 @@ class PdftronFlutter {
     return _channel.invokeMethod(Functions.zoomWithCenter,
         <String, dynamic>{"zoom": zoom, "x": x, "y": y});
   }
-  
+
   /// Zooms the viewer to fit the given rectangular area in the specified page.
   ///
   /// ```dart
@@ -710,9 +717,9 @@ class PdftronFlutter {
       Parameters.red: red,
       Parameters.green: green,
       Parameters.blue: blue
-      });
+    });
   }
-  
+
   /// Gets the horizontal and vertical scroll position in the current document viewer.
   ///
   /// The scroll position is returned as a `Map<String, int>` with the keys
@@ -742,7 +749,7 @@ class PdftronFlutter {
       Parameters.verticalScrollPosition: verticalScrollPosition
     });
   }
-  
+
   /// Gets the page numbers of currently visible pages in the viewer.
   static Future<List<int>?> getVisiblePages() {
     return _channel.invokeMethod(Functions.getVisiblePages);
@@ -751,9 +758,8 @@ class PdftronFlutter {
   // Hygen Generated Methods
   /// Gets the list of annotations on the given page.
   static Future<List<Annot>?> getAnnotationsOnPage(int pageNumber) {
-    return _channel.invokeMethod(Functions.getAnnotationsOnPage, <String, dynamic>{
-      Parameters.pageNumber: pageNumber
-    }).then((jsonArray) {
+    return _channel.invokeMethod(Functions.getAnnotationsOnPage,
+        <String, dynamic>{Parameters.pageNumber: pageNumber}).then((jsonArray) {
       List<dynamic> annotations = jsonDecode(jsonArray);
       List<Annot> annotList = new List<Annot>.empty(growable: true);
       for (dynamic annotation in annotations) {

lib/src/constants.dart

@@ -1,4 +1,3 @@
-
 /// Names of functions.
 class Functions {
   static const getPlatformVersion = "getPlatformVersion";
@@ -9,6 +8,7 @@ class Functions {
   static const getSavedSignatureFolder = "getSavedSignatureFolder";
 
   /// Android only
+  static const showMyToast = "showMyToast";
   static const getSavedSignatureJpgFolder = "getSavedSignatureJpgFolder";
   static const importAnnotations = "importAnnotations";
   static const exportAnnotations = "exportAnnotations";
@@ -75,7 +75,7 @@ class Functions {
   static const getScrollPos = "getScrollPos";
   static const setHorizontalScrollPosition = "setHorizontalScrollPosition";
   static const setVerticalScrollPosition = "setVerticalScrollPosition";
-  static const smartZoom = "smartZoom"; 
+  static const smartZoom = "smartZoom";
   static const getVisiblePages = "getVisiblePages";
 
   // Hygen Generated Methods
@@ -458,4 +458,4 @@ class AnnotationManagerUndoMode {
 class ToolbarAlignment {
   static const Start = "GravityStart";
   static const End = "GravityEnd";
-}
+}

pubspec.yaml

@@ -1,6 +1,6 @@
 name: pdftron_flutter
 description: A convenience wrapper to build Flutter apps that use the PDFTron mobile SDK for smooth, flexible, and stand-alone document viewing.
-version: 1.0.1-1
+version: 1.0.1-3
 homepage: https://www.pdftron.com
 repository: https://github.com/PDFTron/pdftron-flutter
 issue_tracker: https://github.com/PDFTron/pdftron-flutter/issues