Upgraded to new Android plugin APIs.

android/build.gradle

@@ -3,10 +3,8 @@ version '1.0-SNAPSHOT'
 
 buildscript {
     repositories {
-        jcenter()
-        maven {
-            url "https://maven.google.com"
-        }
+        google()
+        mavenCentral()
     }
 
     dependencies {
@@ -16,10 +14,8 @@ buildscript {
 
 rootProject.allprojects {
     repositories {
-        jcenter()
-        maven {
-            url "https://maven.google.com"
-        }
+        google()
+        mavenCentral()
     }
 }
 
@@ -29,11 +25,20 @@ android {
     compileSdkVersion 28
     //buildToolsVersion '28.0.3'
 
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
     defaultConfig {
         minSdkVersion 16
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
     lintOptions {
         disable 'InvalidPackage'
     }
+
+    dependencies {
+        implementation 'androidx.annotation:annotation:1.3.0'
+    }
 }

android/src/main/AndroidManifest.xml

@@ -1,3 +1,3 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-  package="com.yourcompany.geocoder">
+  package="com.aloisdeniel.geocoder">
 </manifest>

android/src/main/java/com/aloisdeniel/geocoder/GeocoderPlugin.java

@@ -12,12 +12,14 @@
 import android.os.AsyncTask;
 import android.os.Handler;
 import android.os.Looper;
+import androidx.annotation.NonNull;
 
+import android.content.Context;
+import io.flutter.embedding.engine.plugins.FlutterPlugin;
+import io.flutter.plugin.common.MethodCall;
 import io.flutter.plugin.common.MethodChannel;
 import io.flutter.plugin.common.MethodChannel.MethodCallHandler;
 import io.flutter.plugin.common.MethodChannel.Result;
-import io.flutter.plugin.common.MethodCall;
-import io.flutter.plugin.common.PluginRegistry.Registrar;
 
 /**
  * NotAvailableException
@@ -29,77 +31,26 @@ class NotAvailableException extends Exception {
 /**
  * GeocoderPlugin
  */
-public class GeocoderPlugin implements MethodCallHandler {
+public class GeocoderPlugin implements FlutterPlugin, MethodCallHandler {
+  private MethodChannel channel;
 
+  private Context context;
   private Geocoder geocoder;
 
-  public GeocoderPlugin(Context context) {
-
+  @Override
+  public void onAttachedToEngine(@NonNull FlutterPluginBinding flutterPluginBinding) {
+    channel = new MethodChannel(flutterPluginBinding.getBinaryMessenger(), "github.com/aloisdeniel/geocoder");
+    channel.setMethodCallHandler(this);
+    context = flutterPluginBinding.getApplicationContext();
     this.geocoder = new Geocoder(context);
   }
 
-  /**
-   * Plugin registration.
-   */
-  public static void registerWith(Registrar registrar) {
-    final MethodChannel channel = new MethodChannel(registrar.messenger(), "github.com/aloisdeniel/geocoder");
-    channel.setMethodCallHandler(new GeocoderPlugin(registrar.context()));
-  }
-
-  // MethodChannel.Result wrapper that responds on the platform thread.
-  private static class MethodResultWrapper implements Result {
-    private Result methodResult;
-    private Handler handler;
-
-    MethodResultWrapper(Result result) {
-      methodResult = result;
-      handler = new Handler(Looper.getMainLooper());
-    }
-
-    @Override
-    public void success(final Object result) {
-      handler.post(
-          new Runnable() {
-            @Override
-            public void run() {
-              methodResult.success(result);
-            }
-          });
-    }
-
-    @Override
-    public void error(
-        final String errorCode, final String errorMessage, final Object errorDetails) {
-      handler.post(
-          new Runnable() {
-            @Override
-            public void run() {
-              methodResult.error(errorCode, errorMessage, errorDetails);
-            }
-          });
-    }
-
-    @Override
-    public void notImplemented() {
-      handler.post(
-          new Runnable() {
-            @Override
-            public void run() {
-              methodResult.notImplemented();
-            }
-          });
-    }
-  }
-
   @Override
-  public void onMethodCall(MethodCall call, Result rawResult) {
-    Result result = new MethodResultWrapper(rawResult);
-
+  public void onMethodCall(@NonNull MethodCall call, @NonNull Result result) {
     if (call.method.equals("findAddressesFromQuery")) {
       String address = (String) call.argument("address");
       findAddressesFromQuery(address, result);
-    }
-    else if (call.method.equals("findAddressesFromCoordinates")) {
+    } else if (call.method.equals("findAddressesFromCoordinates")) {
       float latitude = ((Number) call.argument("latitude")).floatValue();
       float longitude = ((Number) call.argument("longitude")).floatValue();
       findAddressesFromCoordinates(latitude,longitude, result);
@@ -108,6 +59,11 @@ else if (call.method.equals("findAddressesFromCoordinates")) {
     }
   }
 
+  @Override
+  public void onDetachedFromEngine(@NonNull FlutterPluginBinding binding) {
+    channel.setMethodCallHandler(null);
+  }
+
   private void assertPresent() throws NotAvailableException {
     if (!geocoder.isPresent()) {
       throw new NotAvailableException();
@@ -135,10 +91,10 @@ protected void onPostExecute(List<Address> addresses) {
             if (addresses != null) {
                 if (addresses.isEmpty())
                     result.error("not_available", "Empty", null);
-
-                else result.success(createAddressMapList(addresses));
-            }
-            else result.error("failed", "Failed", null);
+                else
+                    result.success(createAddressMapList(addresses));
+            } else
+                result.error("failed", "Failed", null);
         }
     }.execute();
   }
@@ -163,10 +119,10 @@ protected void onPostExecute(List<Address> addresses) {
             if (addresses != null) {
                 if (addresses.isEmpty())
                     result.error("not_available", "Empty", null);
-
-                else result.success(createAddressMapList(addresses));
-            }
-            else result.error("failed", "Failed", null);
+                else
+                    result.success(createAddressMapList(addresses));
+            } else
+                result.error("failed", "Failed", null);
         }
     }.execute();
   }

pubspec.yaml

@@ -3,18 +3,21 @@ description: Forward and reverse geocoding.
 version: 0.2.2-nullsafety
 homepage: https://github.com/JCKodel/flutter_geocoder
 
+environment:
+  sdk: ">=2.12.0 <3.0.0"
+  flutter: ">=1.20.0"
+
+dependencies:
+  flutter:
+    sdk: flutter
+  meta: ^1.1.6
+
 flutter:
   plugin:
     platforms:
       android:
         package: com.aloisdeniel.geocoder
         pluginClass: GeocoderPlugin
+      ios:
+        pluginClass: GeocoderPlugin
 
-dependencies:
-  flutter:
-    sdk: flutter
-  meta: ^1.1.6
-
-environment:
-  flutter: ">=2.0.0"
-  sdk: ">=2.12.0-0 <3.0.0"