optimize webview

app/src/main/AndroidManifest.xml

@@ -17,7 +17,9 @@
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
-        android:theme="@style/Theme.PSP">
+        android:theme="@style/Theme.PSP"
+        android:hardwareAccelerated="true"
+        >
         <activity
             android:name=".MainActivity"
             android:exported="true"

app/src/main/java/com/example/psp/di/AppModule.kt

@@ -0,0 +1,9 @@
+package com.example.psp.di
+
+import dagger.Module
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+
+@Module
+@InstallIn(SingletonComponent::class)
+object AppModule

app/src/main/java/com/example/psp/screen/WebViewScreen.kt

@@ -2,6 +2,7 @@ package com.example.psp.screen
 
 import android.app.Activity
 import android.view.ViewGroup
+import android.webkit.WebSettings
 import android.webkit.WebView
 import android.webkit.WebViewClient
 import androidx.activity.compose.BackHandler
@@ -12,18 +13,20 @@ import androidx.compose.runtime.*
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.viewinterop.AndroidView
+import com.example.design_system.util.snackbar.SnackbarController
+import com.example.design_system.util.snackbar.SnackbarEvent
 import kotlinx.coroutines.launch
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun WebViewScreen(
     url: String,
-    modifier: Modifier = Modifier
+    modifier: Modifier = Modifier,
 ) {
     var webView: WebView? by remember { mutableStateOf(null) }
     val canGoBack = remember { mutableStateOf(false) }
-    val snackbarHostState = remember { SnackbarHostState() }
     val scope = rememberCoroutineScope()
+
     val context = LocalContext.current
     var lastBackTime by remember { mutableLongStateOf(0L) }
 
@@ -37,7 +40,9 @@ fun WebViewScreen(
             } else {
                 lastBackTime = now
                 scope.launch {
-                    snackbarHostState.showSnackbar("Press back again to exit")
+                    SnackbarController.sendEvent(
+                        event = SnackbarEvent(message = "برای خروج یک بار دیگر بر روی دکمه‌ بازگشت کلیک کنید.")
+                    )
                 }
             }
         }
@@ -62,7 +67,6 @@ fun WebViewScreen(
                 }
             )
         },
-        snackbarHost = { SnackbarHost(snackbarHostState) }
     ) { padding ->
         AndroidView(
             modifier = Modifier
@@ -80,13 +84,29 @@ fun WebViewScreen(
                             canGoBack.value = view?.canGoBack() ?: false
                         }
                     }
-                    settings.javaScriptEnabled = true
-                    loadUrl(url)
+
+                    overScrollMode = android.view.View.OVER_SCROLL_NEVER
+
+                    // Apply comprehensive WebView settings
+                    settings.apply {
+                        javaScriptEnabled = true
+                        domStorageEnabled = true
+                        databaseEnabled = true
+                        cacheMode = WebSettings.LOAD_DEFAULT
+                        loadsImagesAutomatically = true
+                        allowFileAccess = true
+                        useWideViewPort = true
+                        loadWithOverviewMode = true
+                        mixedContentMode = WebSettings.MIXED_CONTENT_COMPATIBILITY_MODE
+                        setSupportZoom(false)
+                        builtInZoomControls = false
+                        displayZoomControls = false
+                    }
                     webView = this
                 }
             },
-            update = { view ->
-                webView = view
+            update = {
+                it.loadUrl(url)
             }
         )
     }

app/src/main/java/com/example/psp/viewmodel/WebViewViewModel.kt

@@ -0,0 +1,55 @@
+package com.example.psp.viewmodel
+
+import android.app.Application
+import android.webkit.WebSettings
+import android.webkit.WebView
+import androidx.lifecycle.AndroidViewModel
+import androidx.lifecycle.viewModelScope
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+@HiltViewModel
+class WebViewViewModel @Inject constructor(
+    application: Application
+) : AndroidViewModel(application) {
+
+    private var _preloadedWebView: WebView? = null
+    val preloadedWebView: WebView?
+        get() = _preloadedWebView
+
+    init {
+        preloadWebView()
+    }
+
+    private fun preloadWebView() {
+        viewModelScope.launch {
+            _preloadedWebView = WebView(getApplication()).apply {
+                overScrollMode = android.view.View.OVER_SCROLL_NEVER
+                webChromeClient = android.webkit.WebChromeClient()
+                // Apply the same settings as in WebViewScreen
+                settings.apply {
+                    javaScriptEnabled = true
+                    domStorageEnabled = true
+                    cacheMode = WebSettings.LOAD_DEFAULT
+                    loadsImagesAutomatically = true
+                    allowFileAccess = true
+                    useWideViewPort = true
+                    loadWithOverviewMode = true
+                    mixedContentMode = WebSettings.MIXED_CONTENT_COMPATIBILITY_MODE
+                    setSupportZoom(false)
+                    builtInZoomControls = false
+                    displayZoomControls = false
+                }
+                // Load the URL to preload
+                loadUrl("https://tis.shift-am.ir")
+            }
+        }
+    }
+
+    override fun onCleared() {
+        super.onCleared()
+        _preloadedWebView?.destroy()
+        _preloadedWebView = null
+    }
+}