1、Android混合代码

android/build.gradle

@@ -25,7 +25,7 @@ android {
     compileSdkVersion 28
 
     defaultConfig {
-        minSdkVersion 16
+        minSdkVersion 19
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
     lintOptions {

android/src/main/java/cn/zhios/zhiying_comm/ZhiyingCommPlugin.java

@@ -9,11 +9,12 @@ import io.flutter.plugin.common.MethodChannel.Result;
 import io.flutter.plugin.common.PluginRegistry.Registrar;
 
 /** ZhiyingCommPlugin */
-public class ZhiyingCommPlugin implements FlutterPlugin, MethodCallHandler {
+public class ZhiyingCommPlugin implements FlutterPlugin {
   @Override
   public void onAttachedToEngine(@NonNull FlutterPluginBinding flutterPluginBinding) {
-    final MethodChannel channel = new MethodChannel(flutterPluginBinding.getFlutterEngine().getDartExecutor(), "zhiying_comm");
-    channel.setMethodCallHandler(new ZhiyingCommPlugin());
+//    final MethodChannel channel = new MethodChannel(flutterPluginBinding.getFlutterEngine().getDartExecutor(), "zhiying_comm");
+//    channel.setMethodCallHandler(new ZhiyingCommPlugin());
+      ZhiyingFlutterCommNative.getInstance().registerWith(flutterPluginBinding.getFlutterEngine().getDartExecutor());
   }
 
   // This static function is optional and equivalent to onAttachedToEngine. It supports the old
@@ -26,18 +27,11 @@ public class ZhiyingCommPlugin implements FlutterPlugin, MethodCallHandler {
   // depending on the user's project. onAttachedToEngine or registerWith must both be defined
   // in the same class.
   public static void registerWith(Registrar registrar) {
-    final MethodChannel channel = new MethodChannel(registrar.messenger(), "zhiying_comm");
-    channel.setMethodCallHandler(new ZhiyingCommPlugin());
+//    final MethodChannel channel = new MethodChannel(registrar.messenger(), "zhiying_comm");
+//    channel.setMethodCallHandler(new ZhiyingCommPlugin());
+    ZhiyingFlutterCommNative.getInstance().registerWith(registrar.messenger());
   }
 
-  @Override
-  public void onMethodCall(@NonNull MethodCall call, @NonNull Result result) {
-    if (call.method.equals("getPlatformVersion")) {
-      result.success("Android " + android.os.Build.VERSION.RELEASE);
-    } else {
-      result.notImplemented();
-    }
-  }
 
   @Override
   public void onDetachedFromEngine(@NonNull FlutterPluginBinding binding) {

android/src/main/java/cn/zhios/zhiying_comm/ZhiyingFlutterCommHandler.java

@@ -0,0 +1,7 @@
+package cn.zhios.zhiying_comm;
+
+import java.util.Map;
+
+public interface ZhiyingFlutterCommHandler {
+    public void handle(ZhiyingFlutterCommNativeResult result);
+}

android/src/main/java/cn/zhios/zhiying_comm/ZhiyingFlutterCommNativable.java

@@ -0,0 +1,26 @@
+/*
+ * @Author: your name
+ * @Date: 2020-06-16 15:37:18
+ * @LastEditTime: 2020-06-19 17:13:52
+ * @LastEditors: your name
+ * @Description: In User Settings Edit
+ * @FilePath: /hairuyi_flutter_comm/android/src/main/kotlin/com/fnuoos/hairuyi_flutter_comm/HairuyiFlutterCommNativable.java
+ */
+package cn.zhios.zhiying_comm;
+
+import java.util.Map;
+
+public interface ZhiyingFlutterCommNativable {
+
+    /* 跳转公共方法 */
+    public void openPage(Map params);
+
+    /* 跳转原生页面（非公共跳转） */
+    public void openNativePage(Map params);
+
+    /* 获取设置 */
+    public Map getSetting();
+
+    /* 普通方法(交互) */
+    public void invokeMethod(String method, Map<String, Object> params, ZhiyingFlutterCommHandler handler);
+}

android/src/main/java/cn/zhios/zhiying_comm/ZhiyingFlutterCommNative.java

@@ -0,0 +1,109 @@
+package cn.zhios.zhiying_comm;
+
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import io.flutter.plugin.common.BinaryMessenger;
+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;
+
+public class ZhiyingFlutterCommNative implements MethodCallHandler {
+
+    private ZhiyingFlutterCommNativable       nat;
+    private List<ZhiyingFlutterCommNativable> natLists;
+
+    /**
+     * 类级的内部类，也就是静态的成员式内部类，该内部类的实例与外部类的实例 没有绑定关系，而且只有被调用到才会装载，从而实现了延迟加载
+     */
+    private static class HairuyiFlutterCommNativeHolder {
+        /**
+         * 静态初始化器，由JVM来保证线程安全
+         */
+        private static ZhiyingFlutterCommNative instance = new ZhiyingFlutterCommNative();
+    }
+
+    private ZhiyingFlutterCommNative() {
+        natLists = new ArrayList<>();
+    }
+
+    public static ZhiyingFlutterCommNative getInstance() {
+        return HairuyiFlutterCommNativeHolder.instance;
+    }
+
+    public void registerWith( BinaryMessenger message) {
+        MethodChannel channel = new MethodChannel(message, "zhiying_comm://method");
+        channel.setMethodCallHandler(ZhiyingFlutterCommNative.getInstance());
+    }
+
+    public void regist(ZhiyingFlutterCommNativable nat) {
+        if (null == natLists){ natLists = new ArrayList<>();}
+        natLists.add(nat);
+        this.nat = natLists.get(natLists.size() - 1); // 获取新的
+    }
+
+    public void unregist(){
+        if (null != natLists && natLists.size() > 1){
+            natLists.remove(natLists.size() - 1);
+            nat = natLists.get(natLists.size() -1);
+        }else if (null != natLists && natLists.size() == 1){
+            natLists.clear();
+            nat = null;
+        }
+    }
+
+    @Override
+    public void onMethodCall(MethodCall call, final Result result) {
+
+        /* 公共跳转方法 */
+        if (call.method.equals("openPage")) {
+            if (nat != null) {
+                nat.openPage((Map) call.arguments);
+            }
+            Map map = new HashMap<String, Object>();
+            map.put("success", "1");
+            result.success(map);
+        }
+
+        /* 跳转原生页面（非公共跳转） */
+        if (call.method.equals("openNativePage")) {
+            if (nat != null) {
+                nat.openNativePage((Map) call.arguments);
+            }
+            Map map = new HashMap<String, Object>();
+            map.put("success", "1");
+            result.success(map);
+        }
+
+        /* 获取设置 */
+        if (call.method.equals("getSetting")) {
+            Map map = new HashMap<String, Object>();
+            if (nat != null) {
+                map = nat.getSetting();
+            }
+            result.success(map);
+        }
+
+        /* 调用原生方法 */
+        if (call.method.equals("invokeMethod")) {
+            if (nat != null) {
+                Map params = ((Map<String, String>) call.arguments);
+                nat.invokeMethod((String) params.get("method"), (Map) params.get("params"), new ZhiyingFlutterCommHandler() {
+                    @Override
+                    public void handle(ZhiyingFlutterCommNativeResult res) {
+                        result.success(res.toMap());
+                    }
+                });
+            } else {
+                result.success(ZhiyingFlutterCommNativeResult.notImp().toMap());
+            }
+        } else {
+
+            result.notImplemented();
+        }
+    }
+}

android/src/main/java/cn/zhios/zhiying_comm/ZhiyingFlutterCommNativeResult.java

@@ -0,0 +1,45 @@
+package cn.zhios.zhiying_comm;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class ZhiyingFlutterCommNativeResult {
+    public boolean             success;
+    public String              msg;
+    public Map<String, Object> data;
+
+    public ZhiyingFlutterCommNativeResult(String msg, boolean success, Map<String, Object> data) {
+        this.msg     = msg;
+        this.success = success;
+        this.data    = data;
+    }
+
+    public Map toMap() {
+        Map map = new HashMap<>();
+        map.put("msg", this.msg);
+        map.put("success", this.success ? "1" : "0");
+        map.put("data", this.data);
+        return map;
+    }
+
+    public static ZhiyingFlutterCommNativeResult success(String msg) {
+        return new ZhiyingFlutterCommNativeResult(msg, true, null);
+    }
+
+    public static ZhiyingFlutterCommNativeResult success(String msg, Map<String, Object> data) {
+        return new ZhiyingFlutterCommNativeResult(msg, true, data);
+    }
+
+    public static ZhiyingFlutterCommNativeResult failed(String msg) {
+        return new ZhiyingFlutterCommNativeResult(msg, false, null);
+    }
+
+    public static ZhiyingFlutterCommNativeResult failed(String msg, Map<String, Object> data) {
+        return new ZhiyingFlutterCommNativeResult(msg, false, data);
+    }
+
+    public static ZhiyingFlutterCommNativeResult notImp() {
+        return new ZhiyingFlutterCommNativeResult("native调用失败", false, null);
+    }
+
+}

example/android/app/build.gradle

@@ -34,7 +34,7 @@ android {
     defaultConfig {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "cn.zhios.zhiying_comm_example"
-        minSdkVersion 16
+        minSdkVersion 19
         targetSdkVersion 28
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName