refactor(webview): 将 WebView 活动重构为 Compose 组件

- 移除传统 View 系统实现，采用 Jetpack Compose 架构
- 创建 XWebViewScreen 组件替代原有的 Activity 布局
- 集成 Material Design 3 主题支持
- 保留 WebView 的核心功能和配置选项
- 添加导航状态回调接口支持
- 简化窗口边距和系统栏适配逻辑
- 优化组件生命周期管理和资源释放

sdk-webview/src/main/java/com/xuqm/sdk/webview/XWebViewActivity.kt

@@ -1,235 +1,22 @@
 package com.xuqm.sdk.webview
 
-import android.Manifest
-import android.annotation.SuppressLint
-import android.content.pm.PackageManager
-import android.graphics.Rect
-import android.net.Uri
 import android.os.Bundle
-import android.os.Handler
-import android.os.Looper
-import android.view.View
-import android.view.ViewGroup
-import android.webkit.PermissionRequest
-import android.webkit.ValueCallback
-import android.webkit.WebChromeClient
-import android.webkit.WebResourceRequest
-import android.webkit.WebView
-import android.webkit.WebViewClient
-import android.widget.FrameLayout
 import androidx.activity.ComponentActivity
-import androidx.activity.result.contract.ActivityResultContracts
-import androidx.core.content.ContextCompat
-import androidx.core.content.FileProvider
-import androidx.core.view.ViewCompat
+import androidx.activity.compose.setContent
+import androidx.compose.material3.MaterialTheme
 import androidx.core.view.WindowCompat
-import androidx.core.view.WindowInsetsCompat
-import java.io.File
 
 class XWebViewActivity : ComponentActivity() {
-
-    private lateinit var webView: WebView
-    private val mainHandler = Handler(Looper.getMainLooper())
-    private var pendingWebRtcRequest: PermissionRequest? = null
-    private var pendingFileCallback: ValueCallback<Array<Uri>>? = null
-    private var pendingCameraUri: Uri? = null
-    private var shouldLaunchCamera = false
-    private var currentUrl: String? = null
-
-    private val webRtcPermissionLauncher = registerForActivityResult(
-        ActivityResultContracts.RequestPermission()
-    ) { granted ->
-        val req = pendingWebRtcRequest
-        pendingWebRtcRequest = null
-        if (granted) req?.grant(req.resources) else req?.deny()
-    }
-
-    private val takePictureLauncher = registerForActivityResult(
-        ActivityResultContracts.TakePicture()
-    ) { success ->
-        val cb = pendingFileCallback
-        val uri = pendingCameraUri
-        pendingFileCallback = null
-        pendingCameraUri = null
-        cb?.onReceiveValue(if (success && uri != null) arrayOf(uri) else null)
-    }
-
-    private val pickContentLauncher = registerForActivityResult(GetContentWithMimeTypes()) { uri ->
-        val cb = pendingFileCallback
-        pendingFileCallback = null
-        cb?.onReceiveValue(if (uri != null) arrayOf(uri) else null)
-    }
-
-    private val fileCameraPermissionLauncher = registerForActivityResult(
-        ActivityResultContracts.RequestPermission()
-    ) { granted ->
-        val launch = shouldLaunchCamera
-        shouldLaunchCamera = false
-        if (granted && launch) {
-            runCatching {
-                val imageFile = File.createTempFile("cam_", ".jpg", cacheDir)
-                val uri = FileProvider.getUriForFile(this, "${packageName}.fileprovider", imageFile)
-                pendingCameraUri = uri
-                takePictureLauncher.launch(uri)
-            }.onFailure {
-                pendingFileCallback?.onReceiveValue(null)
-                pendingFileCallback = null
-            }
-        } else {
-            pendingFileCallback?.onReceiveValue(null)
-            pendingFileCallback = null
-        }
-    }
-
-    private fun launchCamera() {
-        if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED) {
-            runCatching {
-                val imageFile = File.createTempFile("cam_", ".jpg", cacheDir)
-                val uri = FileProvider.getUriForFile(this, "${packageName}.fileprovider", imageFile)
-                pendingCameraUri = uri
-                takePictureLauncher.launch(uri)
-            }.onFailure {
-                pendingFileCallback?.onReceiveValue(null)
-                pendingFileCallback = null
-            }
-        } else {
-            shouldLaunchCamera = true
-            fileCameraPermissionLauncher.launch(Manifest.permission.CAMERA)
-        }
-    }
-
-    @SuppressLint("SetJavaScriptEnabled")
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         WindowCompat.setDecorFitsSystemWindows(window, false)
-
-        val config = getXWebViewConfig()
-
-        WebView.setWebContentsDebuggingEnabled(config.debugEnabled)
-        val container = FrameLayout(this)
-        webView = WebView(this).apply {
-            settings.javaScriptEnabled = true
-            settings.domStorageEnabled = true
-            settings.useWideViewPort = true
-            settings.loadWithOverviewMode = true
-            config.userAgent?.let { settings.userAgentString = it }
-
-            addJavascriptInterface(
-                XWebViewJsBridge(mainHandler, { config.onMessage }, { null }),
-                config.jsBridgeName,
-            )
-
-            webViewClient = object : WebViewClient() {
-                override fun onPageFinished(view: WebView?, url: String?) {
-                    currentUrl = url ?: view?.url
-                    super.onPageFinished(view, url)
-                    view?.evaluateJavascript(buildInjectedJs(config), null)
-                }
-
-                override fun shouldOverrideUrlLoading(view: WebView, request: WebResourceRequest) = false
-            }
-
-            webChromeClient = object : WebChromeClient() {
-                override fun onPermissionRequest(request: PermissionRequest) {
-                    if (PermissionRequest.RESOURCE_VIDEO_CAPTURE in request.resources) {
-                        if (ContextCompat.checkSelfPermission(this@XWebViewActivity, Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED) {
-                            request.grant(request.resources)
-                        } else {
-                            pendingWebRtcRequest = request
-                            webRtcPermissionLauncher.launch(Manifest.permission.CAMERA)
-                        }
-                    } else {
-                        request.deny()
-                    }
-                }
-
-                override fun onShowFileChooser(
-                    webView: WebView?,
-                    filePathCallback: ValueCallback<Array<Uri>>,
-                    fileChooserParams: FileChooserParams,
-                ): Boolean {
-                    pendingFileCallback?.onReceiveValue(null)
-                    pendingFileCallback = filePathCallback
-
-                    val acceptMimes = resolvePickerMimeTypes(fileChooserParams.acceptTypes)
-                    val isCameraCapture = fileChooserParams.isCaptureEnabled &&
-                        fileChooserParams.acceptTypes.any { it.contains("image") }
-                    val isImageOnly = acceptMimes.all { it.startsWith("image/") || it == "image/*" }
-
-                    when {
-                        isCameraCapture -> launchCamera()
-                        isImageOnly -> android.app.AlertDialog.Builder(this@XWebViewActivity)
-                            .setTitle("选择图片")
-                            .setItems(arrayOf("从相册选择", "拍照")) { _, which ->
-                                if (which == 0) pickContentLauncher.launch(arrayOf("image/*"))
-                                else launchCamera()
-                            }
-                            .setOnCancelListener {
-                                pendingFileCallback?.onReceiveValue(null)
-                                pendingFileCallback = null
-                            }
-                            .show()
-                        else -> pickContentLauncher.launch(acceptMimes)
-                    }
-                    return true
-                }
+        setContent {
+            MaterialTheme {
+                XWebViewScreen(
+                    config = getXWebViewConfig(),
+                    onBack = { finish() },
+                )
             }
         }
-        container.addView(webView, FrameLayout.LayoutParams(
-            ViewGroup.LayoutParams.MATCH_PARENT,
-            ViewGroup.LayoutParams.MATCH_PARENT,
-        ))
-        setContentView(container)
-
-        ViewCompat.setOnApplyWindowInsetsListener(container) { v, insets ->
-            val bars = insets.getInsets(
-                WindowInsetsCompat.Type.systemBars() or WindowInsetsCompat.Type.displayCutout()
-            )
-            v.setPadding(0, bars.top, 0, bars.bottom)
-            insets
-        }
-
-        container.viewTreeObserver.addOnGlobalLayoutListener {
-            recalculateBottomPadding(container)
-        }
-
-        setXWebViewController(object : XWebViewController {
-            override fun canGoBack(): Boolean = webView.canGoBack()
-            override fun canGoForward(): Boolean = webView.canGoForward()
-            override fun currentUrl(): String? = currentUrl ?: webView.url
-            override fun goBack() { if (webView.canGoBack()) webView.goBack() }
-            override fun goForward() { if (webView.canGoForward()) webView.goForward() }
-            override fun reload() { webView.reload() }
-            override fun loadUrl(url: String) { webView.loadUrl(url) }
-            override fun postMessageToWeb(js: String) { webView.evaluateJavascript(js, null) }
-        })
-
-        if (config.url.isNotBlank()) {
-            webView.loadUrl(config.url)
-        }
-    }
-
-    private fun recalculateBottomPadding(container: View) {
-        val visibleFrame = Rect()
-        container.getWindowVisibleDisplayFrame(visibleFrame)
-        val screenHeight = resources.displayMetrics.heightPixels
-        val bottomHidden = screenHeight - visibleFrame.bottom
-        val currentTop = container.paddingTop
-        val currentBottom = container.paddingBottom
-        val neededBottom = maxOf(currentBottom, bottomHidden)
-        if (neededBottom != currentBottom) {
-            container.setPadding(0, currentTop, 0, neededBottom)
-        }
-    }
-
-    @Suppress("OVERRIDE_DEPRECATION")
-    override fun onBackPressed() {
-        if (webView.canGoBack()) webView.goBack() else super.onBackPressed()
-    }
-
-    override fun onDestroy() {
-        setXWebViewController(null)
-        webView.destroy()
-        super.onDestroy()
     }
 }

sdk-webview/src/main/java/com/xuqm/sdk/webview/XWebViewView.kt

@@ -203,6 +203,7 @@ internal fun String.escapeJs(): String = replace("\\", "\\\\")
 fun XWebViewView(
     modifier: Modifier = Modifier,
     config: XWebViewConfig = getXWebViewConfig(),
+    onNavigationChanged: ((canGoBack: Boolean, canGoForward: Boolean, pageTitle: String) -> Unit)? = null,
 ) {
     val context = LocalContext.current
     var webView by remember { mutableStateOf<WebView?>(null) }
@@ -287,6 +288,9 @@ fun XWebViewView(
     val xwvMessageRef = remember { mutableStateOf(xwvMessageHandler) }
     SideEffect { xwvMessageRef.value = xwvMessageHandler }
 
+    val onNavigationChangedRef = remember { mutableStateOf(onNavigationChanged) }
+    SideEffect { onNavigationChangedRef.value = onNavigationChanged }
+
     // WebRTC getUserMedia() camera permission
     val pendingWebRtcRequest = remember { mutableStateOf<PermissionRequest?>(null) }
     val webRtcPermissionLauncher = rememberLauncherForActivityResult(
@@ -389,6 +393,13 @@ fun XWebViewView(
                         super.onPageFinished(view, url)
                         // Inject DIALOG_OVERRIDE_JS + user script after every page load.
                         view?.evaluateJavascript(buildInjectedJs(config), null)
+                        mainHandler.post {
+                            onNavigationChangedRef.value?.invoke(
+                                view?.canGoBack() == true,
+                                view?.canGoForward() == true,
+                                view?.title.orEmpty(),
+                            )
+                        }
                     }
 
                     override fun shouldOverrideUrlLoading(view: WebView?, request: WebResourceRequest?): Boolean {