docs(android-sdk): 添加 Android SDK 完整文档与模块配置

- 新增 Android SDK 主文档，包含模块结构、集成方式、快速开始指南
- 添加 sdk-core、sdk-im、sdk-push、sdk-update、sdk-webview 各模块详细说明
- 配置各模块的 build.gradle.kts 文件，设置依赖和发布选项
- 更新 gradle.properties 版本配置和编译参数
- 重构 XWebViewView 组件，增加相机权限、文件选择、下载拦截功能
- 添加 XWebViewTypes.kt 定义配置类和控制器接口
- 集成 Flutter WebView 桥接代码，实现跨平台功能对齐

Sources/XuqmWebViewSDK/XWebViewBridge.swift

@@ -24,6 +24,10 @@ public final class XWebViewBridge {
     public func currentController() -> (any XWebViewController)? {
         controller as? any XWebViewController
     }
+
+    public func postMessageToWeb(_ js: String) {
+        currentController()?.postMessageToWeb(js: js)
+    }
 }
 
 @MainActor

Sources/XuqmWebViewSDK/XWebViewTypes.swift

@@ -6,19 +6,25 @@ public struct XWebViewConfig: Sendable {
     public var hideToolbar: Bool
     public var hideStatusBar: Bool
     public var userAgent: String?
+    public var injectedJavaScript: String?
+    public var onMessage: (@Sendable (String) -> Void)?
 
     public init(
         url: String = "",
         title: String = "",
         hideToolbar: Bool = false,
         hideStatusBar: Bool = false,
-        userAgent: String? = nil
+        userAgent: String? = nil,
+        injectedJavaScript: String? = nil,
+        onMessage: (@Sendable (String) -> Void)? = nil
     ) {
         self.url = url
         self.title = title
         self.hideToolbar = hideToolbar
         self.hideStatusBar = hideStatusBar
         self.userAgent = userAgent
+        self.injectedJavaScript = injectedJavaScript
+        self.onMessage = onMessage
     }
 }
 
@@ -30,4 +36,5 @@ public protocol XWebViewController: AnyObject {
     func goForward()
     func reload()
     func load(url: String)
+    func postMessageToWeb(js: String)
 }

Sources/XuqmWebViewSDK/XWebViewView.swift

@@ -1,8 +1,96 @@
 import SwiftUI
 
+// JS bridge name used by DIALOG_OVERRIDE_JS to post messages to native.
+private let kBridgeName = "ReactNativeWebView"
+
+// Injected into every page to override browser dialogs and intercept downloads.
+private let dialogOverrideJs = #"""
+(function() {
+  function post(obj) {
+    window.webkit.messageHandlers.ReactNativeWebView.postMessage(JSON.stringify(obj));
+  }
+
+  window.alert = function(msg) { post({ __xwv: 'alert', msg: String(msg) }); };
+  window.confirm = function(msg) { post({ __xwv: 'confirm', msg: String(msg) }); return true; };
+  window.prompt = function(msg, def) { post({ __xwv: 'prompt', msg: String(msg), def: def || '' }); return def || ''; };
+
+  window.open = function(url) {
+    if (url) { window.location.href = url; }
+    return null;
+  };
+
+  URL.revokeObjectURL = function() {};
+
+  function readBlobAndPost(blobUrl, filename) {
+    fetch(blobUrl)
+      .then(function(r) { return r.blob(); })
+      .then(function(blob) {
+        var reader = new FileReader();
+        reader.onloadend = function() {
+          var b64 = reader.result.split(',')[1];
+          post({ __xwv: 'blobdownload', url: blobUrl, filename: filename, data: b64 });
+        };
+        reader.readAsDataURL(blob);
+      })
+      .catch(function(err) {
+        post({ __xwv: 'bloberror', msg: String(err) });
+      });
+  }
+
+  var DL_RE = "\\.(exe|apk|ipa|zip|rar|tar|gz|dmg|pkg|deb|rpm|msi|pdf|doc|docx|xls|xlsx|ppt|pptx|mp4|mp3|mov|avi|mkv)(\\?|#|$)";
+  var dlRe = new RegExp(DL_RE, 'i');
+
+  function tryInterceptAnchor(el, e) {
+    if (!el || el.tagName !== 'A') return false;
+    var href = el.href || el.getAttribute('href') || '';
+    if (!href || href.indexOf('javascript') === 0) return false;
+    var hasDownloadAttr = el.hasAttribute('download');
+    var dlName = el.getAttribute('download') || '';
+    var isDL = hasDownloadAttr || dlRe.test(href);
+    if (isDL) {
+      if (e) { e.preventDefault(); e.stopPropagation(); }
+      if (href.startsWith('blob:')) {
+        readBlobAndPost(href, dlName);
+      } else {
+        post({ __xwv: 'download', url: href, filename: dlName });
+      }
+      return true;
+    }
+    return false;
+  }
+
+  document.addEventListener('click', function(e) {
+    var el = e.target;
+    while (el && el.tagName !== 'A') { el = el.parentElement; }
+    tryInterceptAnchor(el, e);
+  }, true);
+
+  var _origClick = HTMLAnchorElement.prototype.click;
+  HTMLAnchorElement.prototype.click = function() {
+    if (!tryInterceptAnchor(this, null)) {
+      _origClick.call(this);
+    }
+  };
+})();
+true;
+"""#
+
+private func buildInjectedJs(_ config: XWebViewConfig) -> String {
+    dialogOverrideJs + "\n" + (config.injectedJavaScript ?? "")
+}
+
 #if canImport(UIKit)
 import WebKit
 
+// Weak wrapper prevents retain cycle: WKUserContentController → handler → webView.
+private class WeakScriptHandler: NSObject, WKScriptMessageHandler {
+    weak var target: (NSObject & WKScriptMessageHandler)?
+    init(_ target: NSObject & WKScriptMessageHandler) { self.target = target }
+    func userContentController(_ c: WKUserContentController, didReceive m: WKScriptMessage) {
+        target?.userContentController(c, didReceive: m)
+    }
+}
+
 @MainActor
 public struct XWebViewView: UIViewRepresentable {
     private let config: XWebViewConfig
@@ -12,11 +100,27 @@ public struct XWebViewView: UIViewRepresentable {
     }
 
     public func makeCoordinator() -> Coordinator {
-        Coordinator()
+        Coordinator(config: config)
     }
 
     public func makeUIView(context: Context) -> WKWebView {
-        let webView = WKWebView(frame: .zero)
+        let userController = WKUserContentController()
+
+        // Inject DIALOG_OVERRIDE_JS + user script at document end.
+        let script = WKUserScript(
+            source: buildInjectedJs(config),
+            injectionTime: .atDocumentEnd,
+            forMainFrameOnly: true
+        )
+        userController.addUserScript(script)
+
+        // Register JS → Native message channel via weak proxy to avoid retain cycle.
+        userController.add(WeakScriptHandler(context.coordinator), name: kBridgeName)
+
+        let configuration = WKWebViewConfiguration()
+        configuration.userContentController = userController
+
+        let webView = WKWebView(frame: .zero, configuration: configuration)
         webView.navigationDelegate = context.coordinator
         webView.uiDelegate = context.coordinator
         if let userAgent = config.userAgent {
@@ -38,6 +142,7 @@ public struct XWebViewView: UIViewRepresentable {
     }
 
     public static func dismantleUIView(_ uiView: WKWebView, coordinator: Coordinator) {
+        uiView.configuration.userContentController.removeScriptMessageHandler(forName: kBridgeName)
         coordinator.detach()
         if XWebViewBridge.shared.currentController() === coordinator {
             XWebViewBridge.shared.setController(nil)
@@ -45,45 +150,60 @@ public struct XWebViewView: UIViewRepresentable {
     }
 
     @MainActor
-    public final class Coordinator: NSObject, WKNavigationDelegate, WKUIDelegate, XWebViewController {
+    public final class Coordinator: NSObject, WKNavigationDelegate, WKUIDelegate, WKScriptMessageHandler, XWebViewController {
         private weak var webView: WKWebView?
+        private let config: XWebViewConfig
 
-        func attach(_ webView: WKWebView) {
+        init(config: XWebViewConfig) {
-            self.webView = webView
+            self.config = config
         }
 
-        func detach() {
+        func attach(_ webView: WKWebView) { self.webView = webView }
-            webView = nil
+        func detach() { webView = nil }
-        }
-
-        public func canGoBack() -> Bool {
-            webView?.canGoBack == true
-        }
-
-        public func canGoForward() -> Bool {
-            webView?.canGoForward == true
-        }
-
-        public func currentUrl() -> String? {
-            webView?.url?.absoluteString
-        }
-
-        public func goBack() {
-            webView?.goBack()
-        }
-
-        public func goForward() {
-            webView?.goForward()
-        }
-
-        public func reload() {
-            webView?.reload()
-        }
 
+        public func canGoBack() -> Bool { webView?.canGoBack == true }
+        public func canGoForward() -> Bool { webView?.canGoForward == true }
+        public func currentUrl() -> String? { webView?.url?.absoluteString }
+        public func goBack() { webView?.goBack() }
+        public func goForward() { webView?.goForward() }
+        public func reload() { webView?.reload() }
         public func load(url: String) {
             guard let url = URL(string: url) else { return }
             webView?.load(URLRequest(url: url))
         }
+        public func postMessageToWeb(js: String) {
+            webView?.evaluateJavaScript(js, completionHandler: nil)
+        }
+
+        // WKScriptMessageHandler — routes window.webkit.messageHandlers.ReactNativeWebView.postMessage()
+        public func userContentController(
+            _ userContentController: WKUserContentController,
+            didReceive message: WKScriptMessage
+        ) {
+            guard let raw = message.body as? String else { return }
+            // Filter internal __xwv messages; forward the rest to onMessage.
+            if let data = raw.data(using: .utf8),
+               let json = try? JSONSerialization.jsonObject(with: data) as? [String: Any],
+               let xwv = json["__xwv"] as? String {
+                switch xwv {
+                case "log": return  // debug only, not forwarded
+                case "alert", "confirm", "prompt", "download", "blobdownload", "bloberror": return
+                default: break
+                }
+            }
+            config.onMessage?(raw)
+        }
+
+        @available(iOS 15.0, *)
+        public func webView(
+            _ webView: WKWebView,
+            requestMediaCapturePermissionFor origin: WKSecurityOrigin,
+            initiatedByFrame frame: WKFrameInfo,
+            type: WKMediaCaptureType,
+            decisionHandler: @escaping (WKPermissionDecision) -> Void
+        ) {
+            decisionHandler(.grant)
+        }
     }
 }