在android原生代码里hook掉Flutter读取剪切板的方法,尝试解决隐私问题

android/app/src/main/java/com/eitchsyh/instrument/eitc_erm_dental_flutter/HookFlutterClipBordUtil.java

@@ -0,0 +1,79 @@
+package com.eitchsyh.instrument.eitc_erm_dental_flutter;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.Method;
+import java.lang.reflect.Proxy;
+
+import io.flutter.Log;
+import io.flutter.embedding.engine.FlutterEngine;
+import io.flutter.embedding.engine.systemchannels.PlatformChannel;
+
+/**
+ * File description.
+ * hook flutter输入框 自动调用getClipboardData 引起的合规问题
+ *
+ * @author lihongjun
+ * @date 10/13/21
+ */
+public class HookFlutterClipBordUtil
+{
+    /**
+     * 代理剪切板功能
+     *
+     * @param flutterEngine
+     */
+    public static void hookClipBoard(FlutterEngine flutterEngine)
+    {
+        Class IPlatformMessageHandler;
+        Field platformMessageHandlerField;
+        try
+        {
+            IPlatformMessageHandler = Class.forName(
+                    PlatformChannel.PlatformMessageHandler.class.getName());
+            platformMessageHandlerField = PlatformChannel.class.getDeclaredField(
+                    "platformMessageHandler");
+            platformMessageHandlerField.setAccessible(true);
+
+            // 拿到真实正常的实例，给不需要被hook的方法使用
+            PlatformChannel channel = flutterEngine.getPlatformChannel();
+            Object real = platformMessageHandlerField.get(channel);
+            // 代理PlatformMessageHandler的方法
+            platformMessageHandlerField.set(channel, Proxy.newProxyInstance(
+                    IPlatformMessageHandler.getClassLoader(), new Class[]{IPlatformMessageHandler},
+                    new IClipboardInvocationHandler(real)));
+
+        }
+        catch (Exception e)
+        {
+            Log.e("HookFlutterClipBordUtil", "hook异常", e);
+        }
+    }
+
+    public static class IClipboardInvocationHandler implements InvocationHandler
+    {
+        // 真是的调用方，如果不是获取剪切板 正常调用功能
+        private Object real;
+
+        public IClipboardInvocationHandler(Object real)
+        {
+            this.real = real;
+        }
+
+        @Override
+        public Object invoke(Object proxy, Method method, Object[] args) throws Throwable
+        {
+            //Log.d("test=====",method.getName());
+            // flutter输入框会调用获取剪切板 合规问题屏蔽掉
+            if ("clipboardHasStrings".equals(method.getName()))
+            {
+                return false;
+            }
+            else if ("getClipboardData".equals(method.getName()))
+            {
+                return "";
+            }
+            return method.invoke(real, args);
+        }
+    }
+}

android/app/src/main/java/com/eitchsyh/instrument/eitc_erm_dental_flutter/MainActivity.java

@@ -23,6 +23,7 @@ public class MainActivity extends FlutterActivity implements
         super.configureFlutterEngine(flutterEngine);
         this.videoController = new VideoController(this.getApplicationContext(), flutterEngine);
         this.fileController = new FileController(this.getApplicationContext(), flutterEngine, this);
+        HookFlutterClipBordUtil.hookClipBoard(flutterEngine);
     }
 
     @Override