UI: hide share fab after clearing all benchmark results

examples/llama.android/app/src/main/java/com/example/llama/MainActivity.kt

@@ -259,6 +259,7 @@ fun AppContent(
 
         // Benchmark screen
         currentRoute.startsWith(AppDestinations.BENCHMARK_ROUTE) -> {
+            val showShareFab by benchmarkViewModel.showShareFab.collectAsState()
             val showModelCard by benchmarkViewModel.showModelCard.collectAsState()
 
             ScaffoldConfig(
@@ -272,6 +273,7 @@ fun AppContent(
                 ),
                 bottomBarConfig = BottomBarConfig.Benchmark(
                     engineIdle = !engineState.isUninterruptible,
+                    showShareFab = showShareFab,
                     onShare = { benchmarkViewModel.shareResult(handleScaffoldEvent) },
                     onRerun = { benchmarkViewModel.rerunBenchmark(handleScaffoldEvent) },
                     onClear = { benchmarkViewModel.clearResults(handleScaffoldEvent) },

examples/llama.android/app/src/main/java/com/example/llama/ui/scaffold/AppScaffold.kt

@@ -104,6 +104,7 @@ fun AppScaffold(
 
             is BottomBarConfig.Benchmark -> {
                 BenchmarkBottomBar(
+                    showShareFab = config.showShareFab,
                     engineIdle = config.engineIdle,
                     onShare = config.onShare,
                     onRerun = config.onRerun,

examples/llama.android/app/src/main/java/com/example/llama/ui/scaffold/bottombar/BenchmarkBottomBar.kt

@@ -21,6 +21,7 @@ import androidx.compose.runtime.Composable
 @Composable
 fun BenchmarkBottomBar(
     engineIdle: Boolean,
+    showShareFab: Boolean,
     onShare: () -> Unit,
     onRerun: () -> Unit,
     onClear: () -> Unit,
@@ -59,7 +60,7 @@ fun BenchmarkBottomBar(
         floatingActionButton = {
             // Only show FAB if the benchmark result is ready
             AnimatedVisibility(
-                visible = engineIdle,
+                visible = showShareFab,
                 enter = scaleIn() + fadeIn(),
                 exit = scaleOut() + fadeOut()
             ) {

examples/llama.android/app/src/main/java/com/example/llama/ui/scaffold/bottombar/BottomBarConfig.kt

@@ -87,6 +87,7 @@ sealed class BottomBarConfig {
     }
 
     data class Benchmark(
+        val showShareFab: Boolean,
         val engineIdle: Boolean,
         val onShare: () -> Unit,
         val onRerun: () -> Unit,

examples/llama.android/app/src/main/java/com/example/llama/viewmodel/BenchmarkViewModel.kt

@@ -30,7 +30,7 @@ class BenchmarkViewModel @Inject constructor(
     private val _benchmarkResults = MutableStateFlow<List<BenchmarkResult>>(emptyList())
     val benchmarkResults: StateFlow<List<BenchmarkResult>> = _benchmarkResults.asStateFlow()
 
-     // UI state: Model card
+    // UI state: Model card
     private val _showModelCard = MutableStateFlow(false)
     val showModelCard = _showModelCard.asStateFlow()
 
@@ -38,6 +38,10 @@ class BenchmarkViewModel @Inject constructor(
         _showModelCard.value = show
     }
 
+    // UI state: Share FAB
+    private val _showShareFab = MutableStateFlow(false)
+    val showShareFab = _showShareFab.asStateFlow()
+
     init {
         viewModelScope.launch {
             benchmarkService.benchmarkResults
@@ -61,10 +65,12 @@ class BenchmarkViewModel @Inject constructor(
         }
 
         viewModelScope.launch {
+            _showShareFab.value = false
             val benchmarkStartTs = System.currentTimeMillis()
             benchmarkService.benchmark(pp, tg, pl, nr)
             val benchmarkEndTs = System.currentTimeMillis()
             _benchmarkDuration.emit(benchmarkEndTs - benchmarkStartTs)
+            _showShareFab.value = true
         }
         return true
     }
@@ -76,6 +82,7 @@ class BenchmarkViewModel @Inject constructor(
             false
         } else {
             _benchmarkResults.value = emptyList()
+            _showShareFab.value = false
             onScaffoldEvent?.invoke(ScaffoldEvent.ShowSnackbar(
                 message = "All benchmark results cleared."
             ))