perf: optimize app icon loading with asynchronous Coil retrieval

- Remove `appIcon: Drawable` from `AppInfo` to significantly reduce memory footprint and prevent OOM.
- Replace synchronous icon loading in `AppManagerUtil` with on-demand asynchronous loading.
- Implement custom `AppIconFetcher` using `appicon:` URI scheme for system icon retrieval.
- Use localized `fetcherFactory` in `AppListItem` to keep loading logic isolated and minimize global side effects.
- Improve app list scanning speed by skipping icon extraction during initial load.

V2rayNG/app/build.gradle.kts

@@ -153,6 +153,7 @@ dependencies {
     implementation(libs.androidx.compose.material3)
     implementation(libs.androidx.compose.ui.tooling.preview)
     implementation(libs.lifecycle.runtime.compose)
+    implementation(libs.coil.compose)
 
     debugImplementation(libs.androidx.compose.ui.tooling)
 

V2rayNG/app/src/main/java/com/v2ray/ang/dto/AppInfo.kt

@@ -1,11 +1,8 @@
 package com.v2ray.ang.dto
 
-import android.graphics.drawable.Drawable
-
 data class AppInfo(
     val appName: String,
     val packageName: String,
-    val appIcon: Drawable,
     val isSystemApp: Boolean,
     var isSelected: Int
 )

V2rayNG/app/src/main/java/com/v2ray/ang/ui/apppicker/AppPickerActivity.kt

@@ -187,7 +187,7 @@ fun AppPickerScreen(
                 AppListItem(
                     appName = app.appName,
                     packageName = app.packageName,
-                    icon = app.appIcon,
+                    icon = null,
                     checked = checked,
                     onCheckedChange = { onToggleApp(app.packageName) }
                 )

V2rayNG/app/src/main/java/com/v2ray/ang/ui/apppicker/AppPickerViewModel.kt

@@ -120,13 +120,9 @@ class AppPickerViewModel(application: Application) : BaseViewModel(application)
     }
 
     private fun createSpecialItemUnidentified(context: Context): AppInfo {
-        val icon = context.getDrawable(android.R.drawable.ic_menu_help)
-            ?: context.getDrawable(android.R.drawable.sym_def_app_icon)
-            ?: error("No fallback drawable available")
         return AppInfo(
             appName = context.getString(R.string.app_picker_unknown_app),
             packageName = AppConfig.UNIDENTIFIED_PACKAGE,
-            appIcon = icon,
             isSystemApp = false,
             isSelected = 0
         )

V2rayNG/app/src/main/java/com/v2ray/ang/ui/compose/Components.kt

@@ -1,14 +1,10 @@
 package com.v2ray.ang.ui.compose
 
-import android.graphics.Bitmap
-import android.graphics.Canvas
-import android.graphics.drawable.BitmapDrawable
 import android.graphics.drawable.Drawable
 import androidx.compose.animation.AnimatedVisibility
 import androidx.compose.animation.core.animateDpAsState
 import androidx.compose.animation.expandVertically
 import androidx.compose.animation.shrinkVertically
-import androidx.compose.foundation.Image
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
@@ -45,7 +41,6 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.focus.FocusRequester
 import androidx.compose.ui.focus.focusRequester
 import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.graphics.asImageBitmap
 import androidx.compose.ui.hapticfeedback.HapticFeedbackType
 import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.platform.LocalHapticFeedback
@@ -53,7 +48,11 @@ import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.text.TextStyle
 import androidx.compose.ui.text.input.ImeAction
 import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.unit.dp
+import coil.compose.AsyncImage
+import coil.request.ImageRequest
+import com.v2ray.ang.util.AppIconFetcher
 import androidx.compose.ui.unit.sp
 import com.v2ray.ang.R
 import sh.calvin.reorderable.ReorderableCollectionItemScope
@@ -163,6 +162,7 @@ fun AppListItem(
     onCheckedChange: (Boolean) -> Unit,
     modifier: Modifier = Modifier
 ) {
+    val context = LocalContext.current
     Row(
         modifier = modifier
             .fillMaxWidth()
@@ -170,41 +170,26 @@ fun AppListItem(
             .padding(horizontal = 16.dp, vertical = 12.dp),
         verticalAlignment = Alignment.CenterVertically
     ) {
-        if (icon != null) {
-            when (icon) {
-                is Bitmap -> {
-                    Image(
-                        bitmap = icon.asImageBitmap(),
-                        contentDescription = null,
-                        modifier = Modifier.size(40.dp),
-                        contentScale = ContentScale.Fit
-                    )
-                }
-
-                is Int -> {
-                    Image(
-                        painter = painterResource(id = icon),
-                        contentDescription = null,
-                        modifier = Modifier.size(40.dp),
-                        contentScale = ContentScale.Fit
-                    )
-                }
-
-                is Drawable -> {
-                    val bitmap = remember(icon) { createBitmapFromDrawable(icon) }
-                    Image(
-                        bitmap = bitmap.asImageBitmap(),
-                        contentDescription = null,
-                        modifier = Modifier.size(40.dp),
-                        contentScale = ContentScale.Fit
-                    )
-                }
-
-                else -> {
-                    Box(modifier = Modifier.size(40.dp))
-                }
+        val model = remember(icon, packageName) {
+            if (icon != null) {
+                icon
+            } else {
+                val data = "appicon:$packageName"
+                ImageRequest.Builder(context)
+                    .data(data)
+                    .fetcherFactory(AppIconFetcher.Factory(context))
+                    .build()
             }
         }
+
+        AsyncImage(
+            model = model,
+            contentDescription = null,
+            modifier = Modifier.size(40.dp),
+            contentScale = ContentScale.Fit,
+            error = painterResource(R.drawable.ic_image_24dp),
+            fallback = painterResource(R.drawable.ic_image_24dp)
+        )
         Spacer(modifier = Modifier.width(16.dp))
         Column(modifier = Modifier.weight(1f)) {
             Text(
@@ -230,19 +215,6 @@ fun AppListItem(
     }
 }
 
-private fun createBitmapFromDrawable(drawable: Drawable): Bitmap {
-    if (drawable is BitmapDrawable) {
-        return drawable.bitmap
-    }
-    val width = drawable.intrinsicWidth.takeIf { it > 0 } ?: 96
-    val height = drawable.intrinsicHeight.takeIf { it > 0 } ?: 96
-    val bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888)
-    val canvas = Canvas(bitmap)
-    drawable.setBounds(0, 0, canvas.width, canvas.height)
-    drawable.draw(canvas)
-    return bitmap
-}
-
 @Composable
 fun ItemDivider() {
     AppDivider(modifier = Modifier.padding(horizontal = 12.dp))

V2rayNG/app/src/main/java/com/v2ray/ang/ui/perappproxy/PerAppProxyActivity.kt

@@ -272,7 +272,7 @@ fun PerAppProxyScreen(
                     AppListItem(
                         appName = app.appName,
                         packageName = app.packageName,
-                        icon = app.appIcon,
+                        icon = null,
                         checked = checked,
                         onCheckedChange = { onToggleApp(app.packageName) }
                     )

V2rayNG/app/src/main/java/com/v2ray/ang/util/AppIconFetcher.kt

@@ -0,0 +1,46 @@
+package com.v2ray.ang.util
+
+import android.content.Context
+import coil.ImageLoader
+import coil.decode.DataSource
+import coil.fetch.DrawableResult
+import coil.fetch.FetchResult
+import coil.fetch.Fetcher
+import coil.request.Options
+import com.v2ray.ang.AppConfig
+
+class AppIconFetcher(
+    private val packageName: String,
+    private val context: Context
+) : Fetcher {
+    override suspend fun fetch(): FetchResult? {
+        val drawable = try {
+            if (packageName == AppConfig.UNIDENTIFIED_PACKAGE) {
+                context.getDrawable(android.R.drawable.ic_menu_help)
+                    ?: context.getDrawable(android.R.drawable.sym_def_app_icon)
+            } else {
+                context.packageManager.getApplicationIcon(packageName)
+            }
+        } catch (_: Exception) {
+            null
+        } ?: return null
+
+        return DrawableResult(
+            drawable = drawable,
+            isSampled = false,
+            dataSource = DataSource.DISK
+        )
+    }
+
+    class Factory(private val context: Context) : Fetcher.Factory<Any> {
+        override fun create(data: Any, options: Options, imageLoader: ImageLoader): Fetcher? {
+            val dataString = data.toString()
+            
+            if (dataString.startsWith("appicon:")) {
+                val pkg = dataString.substringAfter("appicon:")
+                return AppIconFetcher(pkg, context)
+            }
+            return null
+        }
+    }
+}

V2rayNG/app/src/main/java/com/v2ray/ang/util/AppManagerUtil.kt

@@ -24,10 +24,9 @@ object AppManagerUtil {
                 val applicationInfo = pkg.applicationInfo ?: continue
 
                 val appName = applicationInfo.loadLabel(packageManager).toString()
-                val appIcon = applicationInfo.loadIcon(packageManager) ?: continue
                 val isSystemApp = applicationInfo.flags and ApplicationInfo.FLAG_SYSTEM > 0
 
-                val appInfo = AppInfo(appName, pkg.packageName, appIcon, isSystemApp, 0)
+                val appInfo = AppInfo(appName, pkg.packageName, isSystemApp, 0)
                 apps.add(appInfo)
             }
 

V2rayNG/gradle/libs.versions.toml

@@ -19,6 +19,7 @@ mockitoMockitoInline = "5.2.0"
 camerax = "1.6.1"
 composeBom = "2026.06.01"
 reorderable = "3.1.0"
+coil = "2.7.0"
 [libraries]
 androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
 desugar-jdk-libs = { module = "com.android.tools:desugar_jdk_libs", version.ref = "desugarJdkLibs" }
@@ -54,6 +55,7 @@ androidx-compose-ui = { group = "androidx.compose.ui", name = "ui" }
 androidx-compose-ui-tooling = { group = "androidx.compose.ui", name = "ui-tooling" }
 androidx-compose-ui-tooling-preview = { group = "androidx.compose.ui", name = "ui-tooling-preview" }
 lifecycle-runtime-compose = { module = "androidx.lifecycle:lifecycle-runtime-compose", version.ref = "lifecycleViewmodelKtx" }
+coil-compose = { module = "io.coil-kt:coil-compose", version.ref = "coil" }
 [plugins]
 android-application = { id = "com.android.application", version.ref = "agp" }
 android-library = { id = "com.android.library", version.ref = "agp" }