feat(android): launch icon stays up for at least half a second

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/packages/meshbay-android/app/src/main/kotlin/org/meshbay/client/MainActivity.kt b/packages/meshbay-android/app/src/main/kotlin/org/meshbay/client/MainActivity.kt
index fc446b9..0fa63d6 100644
--- a/packages/meshbay-android/app/src/main/kotlin/org/meshbay/client/MainActivity.kt
+++ b/packages/meshbay-android/app/src/main/kotlin/org/meshbay/client/MainActivity.kt
@@ -6,9 +6,11 @@ import android.content.Intent
 import android.net.Uri
 import android.os.Build
 import android.os.Bundle
+import android.os.SystemClock
 import android.util.Log
 import android.view.View
 import android.view.ViewGroup
+import android.view.ViewTreeObserver
 import android.view.WindowInsets
 import android.webkit.ConsoleMessage
 import android.webkit.PermissionRequest
@@ -66,6 +68,7 @@ class MainActivity : Activity() {
         root = FrameLayout(this)
         setContentView(root)
         applyInsets(root)
+        if (savedInstanceState == null && Build.VERSION.SDK_INT >= 31) holdSplash()
 
         // A WebView too old for the page's crypto would fail at the first
         // handshake; say so before loading anything.
@@ -255,6 +258,22 @@ class MainActivity : Activity() {
         catch (e: android.content.ActivityNotFoundException) { Log.w(Bridge.TAG, "no browser for $url") }
     }
 
+    /**
+     * Android 12+ shows the launcher icon until the first frame is drawn, which
+     * on a warm process is a flash. Holding that frame keeps it up long enough
+     * to be seen; the WebView loads underneath in the meantime.
+     */
+    private fun holdSplash() {
+        val until = SystemClock.uptimeMillis() + SPLASH_MS
+        root.viewTreeObserver.addOnPreDrawListener(object : ViewTreeObserver.OnPreDrawListener {
+            override fun onPreDraw(): Boolean {
+                if (SystemClock.uptimeMillis() < until) return false
+                root.viewTreeObserver.removeOnPreDrawListener(this)
+                return true
+            }
+        })
+    }
+
     /** Edge-to-edge is enforced from Android 15: keep the page clear of the bars and the keyboard. */
     private fun applyInsets(view: View) {
         view.setOnApplyWindowInsetsListener { v, insets ->
@@ -296,4 +315,8 @@ class MainActivity : Activity() {
         if (::web.isInitialized) { root.removeView(web); web.destroy() }
         super.onDestroy()
     }
+
+    companion object {
+        private const val SPLASH_MS = 500L
+    }
 }