chore: remove temporary H5 cache diagnostics

android/app/src/main/kotlin/io/openim/flutter/openim/MainActivity.kt

@@ -11,34 +11,22 @@ import android.net.Uri
 import android.os.Build
 import android.util.Base64
 import android.util.Log
-import android.webkit.ServiceWorkerController
-import android.webkit.WebSettings
-import android.webkit.WebStorage
-import android.webkit.WebView
 import androidx.core.content.FileProvider
 import io.flutter.embedding.android.FlutterActivity
 import org.conscrypt.Conscrypt
 import java.security.Security
 import io.flutter.embedding.engine.FlutterEngine
 import io.flutter.plugin.common.MethodChannel
-import io.flutter.plugins.webviewflutter.WebViewFlutterAndroidExternalApi
 import java.io.ByteArrayOutputStream
 import java.io.File
 
 class MainActivity : FlutterActivity() {
     private val CHANNEL = "io.openim.flutter.openim/apk_info"
     private val SHELL_BRANDING_CHANNEL = "io.openim.flutter.im_webview_app/shell_branding"
-    private val WEBVIEW_CACHE_CHANNEL = "io.openim.flutter.im_webview_app/webview_cache"
     private val TAG = "MainActivity"
     private val MAX_BRANDING_ICON_SIZE = 192
-    private val WEBVIEW_DATA_DIRECTORY_SUFFIX = "h5_shell_fresh_profile_v5"
-    private val WEBVIEW_STORAGE_RESET_PREFS = "h5_shell_webview_storage"
-    private val WEBVIEW_STORAGE_RESET_KEY = "reset_version"
-    private val WEBVIEW_STORAGE_RESET_VERSION = 5
 
     override fun onCreate(savedInstanceState: android.os.Bundle?) {
-        configureWebViewDataDirectory()
-        clearWebViewPersistentStorageOnce()
         // 华为/荣耀/OPPO 等国产设备：在任意网络请求之前同步安装 Conscrypt，修复 SSL 握手失败（无 GMS 时系统 SSL 实现不完整）
         try {
             Security.insertProviderAt(Conscrypt.newProvider(), 1)
@@ -119,109 +107,6 @@ class MainActivity : FlutterActivity() {
                 }
             }
         }
-        MethodChannel(flutterEngine.dartExecutor.binaryMessenger, WEBVIEW_CACHE_CHANNEL).setMethodCallHandler { call, result ->
-            when (call.method) {
-                "configureNoCache" -> {
-                    val webViewId = readLongArgument(call.argument<Any>("webViewId"))
-                    if (webViewId == null) {
-                        result.error("INVALID_ARGUMENT", "webViewId 不能为空", null)
-                        return@setMethodCallHandler
-                    }
-
-                    try {
-                        result.success(configureWebViewNoCache(flutterEngine, webViewId))
-                    } catch (e: Exception) {
-                        result.error("ERROR", "无法配置 WebView 缓存策略: ${e.message}", null)
-                    }
-                }
-                else -> {
-                    result.notImplemented()
-                }
-            }
-        }
-    }
-
-    private fun configureWebViewDataDirectory() {
-        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.P) {
-            return
-        }
-
-        try {
-            WebView.setDataDirectorySuffix(WEBVIEW_DATA_DIRECTORY_SUFFIX)
-        } catch (e: IllegalStateException) {
-            Log.w(TAG, "WebView data directory already initialized: ${e.message}")
-        } catch (e: Exception) {
-            Log.w(TAG, "WebView data directory configure failed: ${e.message}")
-        }
-    }
-
-    private fun clearWebViewPersistentStorageOnce() {
-        val prefs = getSharedPreferences(WEBVIEW_STORAGE_RESET_PREFS, MODE_PRIVATE)
-        if (prefs.getInt(WEBVIEW_STORAGE_RESET_KEY, 0) >= WEBVIEW_STORAGE_RESET_VERSION) {
-            return
-        }
-
-        try {
-            WebStorage.getInstance().deleteAllData()
-            Log.d(TAG, "WebView persistent storage cleared")
-        } catch (e: Exception) {
-            Log.w(TAG, "WebView persistent storage clear failed: ${e.message}")
-        }
-
-        clearKnownWebViewCacheDirectories()
-        prefs.edit().putInt(WEBVIEW_STORAGE_RESET_KEY, WEBVIEW_STORAGE_RESET_VERSION).apply()
-    }
-
-    private fun clearKnownWebViewCacheDirectories() {
-        val cacheDirectoryNames = listOf(
-            "WebView",
-            "webview",
-            "org.chromium.android_webview",
-            "com.android.webview"
-        )
-
-        for (name in cacheDirectoryNames) {
-            val directory = File(cacheDir, name)
-            if (!directory.exists()) {
-                continue
-            }
-            try {
-                if (!directory.deleteRecursively()) {
-                    Log.w(TAG, "WebView cache directory delete returned false: ${directory.absolutePath}")
-                }
-            } catch (e: Exception) {
-                Log.w(TAG, "WebView cache directory delete failed: ${directory.absolutePath}, ${e.message}")
-            }
-        }
-    }
-
-    private fun readLongArgument(value: Any?): Long? {
-        return when (value) {
-            is Int -> value.toLong()
-            is Long -> value
-            is Number -> value.toLong()
-            else -> null
-        }
-    }
-
-    private fun configureWebViewNoCache(flutterEngine: FlutterEngine, webViewId: Long): Boolean {
-        val webView = WebViewFlutterAndroidExternalApi.getWebView(flutterEngine, webViewId) ?: return false
-
-        webView.settings.cacheMode = WebSettings.LOAD_NO_CACHE
-        webView.clearCache(true)
-
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
-            try {
-                ServiceWorkerController
-                    .getInstance()
-                    .serviceWorkerWebSettings
-                    .cacheMode = WebSettings.LOAD_NO_CACHE
-            } catch (e: Exception) {
-                Log.w(TAG, "ServiceWorker cache mode configure failed: ${e.message}")
-            }
-        }
-
-        return true
     }
 
     private fun getCurrentAppName(): String {