Support android platform

Author: lijy91

README-ZH.md

@@ -21,6 +21,8 @@
 
 - [protocol_handler](#protocol_handler)
   - [平台支持](#平台支持)
+    - [桌面端](#桌面端)
+    - [移动端](#移动端)
   - [快速开始](#快速开始)
     - [安装](#安装)
     - [用法](#用法)
@@ -34,10 +36,17 @@
 
 ## 平台支持
 
+### 桌面端
+
 | Linux | macOS | Windows |
 | :---: | :---: | :-----: |
 |   ➖   |   ✔️   |    ✔️    |
 
+### 移动端
+
+| Android |  iOS  |
+| :-----: | :---: |
+|    ✔️    |   ✔️   |
 ## 快速开始
 
 ### 安装

README.md

@@ -46,7 +46,7 @@ English | [简体中文](./README-ZH.md)
 
 | Android |  iOS  |
 | :-----: | :---: |
-|    ➖    |   ✔️   |
+|    ✔️    |   ✔️   |
 
 ## Quick Start
 

android/.gitignore

@@ -0,0 +1,8 @@
+*.iml
+.gradle
+/local.properties
+/.idea/workspace.xml
+/.idea/libraries
+.DS_Store
+/build
+/captures

android/build.gradle

@@ -0,0 +1,35 @@
+group 'org.leanflutter.plugins.protocol_handler'
+version '1.0'
+
+buildscript {
+    repositories {
+        google()
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:4.1.0'
+    }
+}
+
+rootProject.allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+apply plugin: 'com.android.library'
+
+android {
+    compileSdkVersion 31
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    defaultConfig {
+        minSdkVersion 16
+    }
+}

android/settings.gradle

@@ -0,0 +1 @@
+rootProject.name = 'protocol_handler'

android/src/main/AndroidManifest.xml

@@ -0,0 +1,3 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+  package="org.leanflutter.plugins.protocol_handler">
+</manifest>

android/src/main/java/org/leanflutter/plugins/protocol_handler/ProtocolHandlerPlugin.java

@@ -0,0 +1,91 @@
+package org.leanflutter.plugins.protocol_handler;
+
+import android.content.Intent;
+
+import androidx.annotation.NonNull;
+
+import java.util.HashMap;
+import java.util.Map;
+
+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.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.PluginRegistry;
+
+/**
+ * ProtocolHandlerPlugin
+ */
+public class ProtocolHandlerPlugin implements FlutterPlugin, MethodCallHandler, ActivityAware, PluginRegistry.NewIntentListener {
+    /// The MethodChannel that will the communication between Flutter and native Android
+    ///
+    /// This local reference serves to register the plugin with the Flutter Engine and unregister it
+    /// when the Flutter Engine is detached from the Activity
+    private MethodChannel channel;
+
+    private String initialUrl = "";
+
+    @Override
+    public void onAttachedToEngine(@NonNull FlutterPluginBinding flutterPluginBinding) {
+        channel = new MethodChannel(flutterPluginBinding.getBinaryMessenger(), "protocol_handler");
+        channel.setMethodCallHandler(this);
+    }
+
+    @Override
+    public void onMethodCall(@NonNull MethodCall call, @NonNull Result result) {
+        if (call.method.equals("getInitialUrl")) {
+            result.success(initialUrl);
+        } else {
+            result.notImplemented();
+        }
+    }
+
+    @Override
+    public void onDetachedFromEngine(@NonNull FlutterPluginBinding binding) {
+        channel.setMethodCallHandler(null);
+    }
+
+    @Override
+    public boolean onNewIntent(Intent intent) {
+        this.handleIntent(intent, true);
+        return false;
+    }
+
+    @Override
+    public void onAttachedToActivity(@NonNull ActivityPluginBinding binding) {
+        binding.addOnNewIntentListener(this);
+        this.handleIntent(binding.getActivity().getIntent(), true);
+    }
+
+    @Override
+    public void onDetachedFromActivityForConfigChanges() { }
+
+    @Override
+    public void onReattachedToActivityForConfigChanges(@NonNull ActivityPluginBinding binding) {
+        this.handleIntent(binding.getActivity().getIntent(), false);
+    }
+
+    @Override
+    public void onDetachedFromActivity() { }
+
+    private void handleIntent(Intent intent, boolean isFromOnNewIntent) {
+        String action = intent.getAction();
+        String dataString = intent.getDataString();
+
+        if (Intent.ACTION_VIEW.equals(action)) {
+            if (isFromOnNewIntent) {
+                this.initialUrl = dataString;
+            }
+            notifyUrlReceived(dataString);
+        }
+    }
+
+    private void notifyUrlReceived(String url) {
+        Map<String, String> args = new HashMap<>();
+        args.put("url", url);
+        channel.invokeMethod("onProtocolUrlReceived", args);
+    }
+}

lib/src/protocol_registrar.dart

@@ -1,12 +1,14 @@
 import 'dart:io';
 
+import 'protocol_registrar_impl_android.dart';
 import 'protocol_registrar_impl_ios.dart';
 import 'protocol_registrar_impl_macos.dart';
 import 'protocol_registrar_impl_windows.dart';
 
 class ProtocolRegistrar {
   /// The shared instance of [ProtocolRegistrar].
   static ProtocolRegistrar get instance {
+    if (Platform.isAndroid) return ProtocolRegistrarImplAndroid.instance;
     if (Platform.isIOS) return ProtocolRegistrarImplIOS.instance;
     if (Platform.isMacOS) return ProtocolRegistrarImplMacOS.instance;
     if (Platform.isWindows) return ProtocolRegistrarImplWindows.instance;

lib/src/protocol_registrar_impl_android.dart

@@ -0,0 +1,14 @@
+import 'protocol_registrar.dart';
+
+class ProtocolRegistrarImplAndroid extends ProtocolRegistrar {
+  ProtocolRegistrarImplAndroid._();
+
+  /// The shared instance of [ProtocolRegistrarImplAndroid].
+  static final ProtocolRegistrarImplAndroid instance =
+      ProtocolRegistrarImplAndroid._();
+
+  @override
+  Future<void> register(String protocol) async {
+    // Skip
+  }
+}

pubspec.yaml

@@ -26,6 +26,9 @@ dev_dependencies:
 flutter:
   plugin:
     platforms:
+      android:
+        package: org.leanflutter.plugins.protocol_handler
+        pluginClass: ProtocolHandlerPlugin
       ios:
         pluginClass: ProtocolHandlerPlugin
       macos: