UI: allow hide or show model card on Conversation & Benchmark screens; fix message arrangement

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

@@ -257,6 +257,7 @@ fun AppContent(
         // Benchmark screen
         currentRoute.startsWith(AppDestinations.BENCHMARK_ROUTE) -> {
             val engineState by benchmarkViewModel.engineState.collectAsState()
+            val showModelCard by benchmarkViewModel.showModelCard.collectAsState()
             val benchmarkResults by benchmarkViewModel.benchmarkResults.collectAsState()
 
             ScaffoldConfig(
@@ -285,12 +286,16 @@ fun AppContent(
                             handleScaffoldEvent(ScaffoldEvent.ShareText(it.text))
                         }
                     },
+                    showModelCard = showModelCard,
+                    onToggleModelCard = benchmarkViewModel::toggleModelCard,
                 )
             )
         }
 
         // Conversation screen
         currentRoute.startsWith(AppDestinations.CONVERSATION_ROUTE) -> {
+            val showModelCard by conversationViewModel.showModelCard.collectAsState()
+
             val modelThinkingOrSpeaking =
                 engineState is State.ProcessingUserPrompt || engineState is State.Generating
 
@@ -313,6 +318,8 @@ fun AppContent(
                     isEnabled = !modelThinkingOrSpeaking,
                     textFieldState = conversationViewModel.inputFieldState,
                     onSendClick = conversationViewModel::sendMessage,
+                    showModelCard = showModelCard,
+                    onToggleModelCard = conversationViewModel::toggleModelCard,
                     onAttachPhotoClick = showStubMessage,
                     onAttachFileClick = showStubMessage,
                     onAudioInputClick = showStubMessage,

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

@@ -106,7 +106,9 @@ fun AppScaffold(
                 BenchmarkBottomBar(
                     engineIdle = config.engineIdle,
                     onRerun = config.onRerun,
-                    onShare = config.onShare
+                    onShare = config.onShare,
+                    showModelCard = config.showModelCard,
+                    onToggleModelCard = config.onToggleModelCard,
                 )
             }
 
@@ -115,6 +117,8 @@ fun AppScaffold(
                     isReady = config.isEnabled,
                     textFieldState = config.textFieldState,
                     onSendClick = config.onSendClick,
+                    showModelCard = config.showModelCard,
+                    onToggleModelCard = config.onToggleModelCard,
                     onAttachPhotoClick = config.onAttachPhotoClick,
                     onAttachFileClick = config.onAttachFileClick,
                     onAudioInputClick = config.onAudioInputClick,

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

@@ -6,8 +6,10 @@ import androidx.compose.animation.fadeOut
 import androidx.compose.animation.scaleIn
 import androidx.compose.animation.scaleOut
 import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Badge
 import androidx.compose.material.icons.filled.Replay
 import androidx.compose.material.icons.filled.Share
+import androidx.compose.material.icons.outlined.Badge
 import androidx.compose.material3.BottomAppBar
 import androidx.compose.material3.FloatingActionButton
 import androidx.compose.material3.Icon
@@ -20,6 +22,8 @@ fun BenchmarkBottomBar(
     engineIdle: Boolean,
     onRerun: () -> Unit,
     onShare: () -> Unit,
+    showModelCard: Boolean,
+    onToggleModelCard: (Boolean) -> Unit,
 ) {
     BottomAppBar(
         actions = {
@@ -32,6 +36,13 @@ fun BenchmarkBottomBar(
                         else MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.3f)
                 )
             }
+
+            IconButton(onClick = { onToggleModelCard(!showModelCard) } ) {
+                Icon(
+                    imageVector = if (showModelCard) Icons.Default.Badge else Icons.Outlined.Badge,
+                    contentDescription = "${if (showModelCard) "Hide" else "Show"} model card"
+                )
+            }
         },
         floatingActionButton = {
             // Only show FAB if the benchmark result is ready

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

@@ -89,12 +89,16 @@ sealed class BottomBarConfig {
         val engineIdle: Boolean,
         val onRerun: () -> Unit,
         val onShare: () -> Unit,
+        val showModelCard: Boolean,
+        val onToggleModelCard: (Boolean) -> Unit,
     ) : BottomBarConfig()
 
     data class Conversation(
         val isEnabled: Boolean,
         val textFieldState: TextFieldState,
         val onSendClick: () -> Unit,
+        val showModelCard: Boolean,
+        val onToggleModelCard: (Boolean) -> Unit,
         val onAttachPhotoClick: () -> Unit,
         val onAttachFileClick: () -> Unit,
         val onAudioInputClick: () -> Unit,

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

@@ -11,9 +11,11 @@ import androidx.compose.foundation.text.input.TextFieldLineLimits
 import androidx.compose.foundation.text.input.TextFieldState
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.Send
+import androidx.compose.material.icons.filled.Badge
 import androidx.compose.material.icons.filled.Mic
 import androidx.compose.material.icons.outlined.AddPhotoAlternate
 import androidx.compose.material.icons.outlined.AttachFile
+import androidx.compose.material.icons.outlined.Badge
 import androidx.compose.material3.BottomAppBar
 import androidx.compose.material3.BottomAppBarDefaults
 import androidx.compose.material3.CircularProgressIndicator
@@ -37,6 +39,8 @@ fun ConversationBottomBar(
     textFieldState: TextFieldState,
     isReady: Boolean,
     onSendClick: () -> Unit,
+    showModelCard: Boolean,
+    onToggleModelCard: (Boolean) -> Unit,
     onAttachPhotoClick: () -> Unit,
     onAttachFileClick: () -> Unit,
     onAudioInputClick: () -> Unit,
@@ -58,7 +62,7 @@ fun ConversationBottomBar(
             ) {
                 OutlinedTextField(
                     state = textFieldState,
-                    modifier = Modifier.Companion.fillMaxWidth().padding(end = 8.dp),
+                    modifier = Modifier.Companion.fillMaxWidth(),
                     enabled = isReady,
                     placeholder = { Text(placeholder) },
                     lineLimits = TextFieldLineLimits.MultiLine(maxHeightInLines = 5),
@@ -102,6 +106,13 @@ fun ConversationBottomBar(
                         contentDescription = "Input with voice",
                     )
                 }
+
+                IconButton(onClick = { onToggleModelCard(!showModelCard) } ) {
+                    Icon(
+                        imageVector = if (showModelCard) Icons.Default.Badge else Icons.Outlined.Badge,
+                        contentDescription = "${if (showModelCard) "Hide" else "Show"} model card"
+                    )
+                }
             },
             floatingActionButton = {
                 FloatingActionButton(

examples/llama.android/app/src/main/java/com/example/llama/revamp/ui/screens/BenchmarkScreen.kt

@@ -54,10 +54,13 @@ fun BenchmarkScreen(
 ) {
     // View model states
     val engineState by viewModel.engineState.collectAsState()
-    val benchmarkResults by viewModel.benchmarkResults.collectAsState()
-    val selectedModel by viewModel.selectedModel.collectAsState()
     val unloadDialogState by viewModel.unloadModelState.collectAsState()
 
+    val showModelCard by viewModel.showModelCard.collectAsState()
+    val selectedModel by viewModel.selectedModel.collectAsState()
+
+    val benchmarkResults by viewModel.benchmarkResults.collectAsState()
+
     // UI states
     var isModelCardExpanded by remember { mutableStateOf(false) }
 
@@ -71,36 +74,18 @@ fun BenchmarkScreen(
         viewModel.onBackPressed(onNavigateBack)
     }
 
-    Column(
-        modifier = Modifier.fillMaxSize().verticalScroll(rememberScrollState())
-    ) {
-        // Selected model card
-        selectedModel?.let { model ->
     Box(
-                modifier = Modifier.padding(start = 16.dp, top = 16.dp, end = 16.dp)
+        modifier = Modifier.fillMaxSize()
-            ) {
-                ModelCardWithLoadingMetrics(
-                    model = model,
-                    loadingMetrics = loadingMetrics,
-                    isExpanded = isModelCardExpanded,
-                    onExpanded = { isModelCardExpanded = !isModelCardExpanded },
-                )
-            }
-        }
-
-        Box(
-            modifier = Modifier.fillMaxWidth().weight(1f),
-            contentAlignment = Alignment.Center
     ) {
         // Benchmark results
         LazyColumn(
             modifier = Modifier.fillMaxSize(),
-                verticalArrangement = Arrangement.spacedBy(16.dp),
+            contentPadding = PaddingValues(8.dp),
-                contentPadding = PaddingValues(horizontal = 16.dp, vertical = 16.dp),
+            verticalArrangement = Arrangement.Bottom,
         ) {
             items(items = benchmarkResults) { result ->
                 Card(
-                        modifier = Modifier.fillMaxWidth()
+                    modifier = Modifier.fillMaxWidth().padding(8.dp)
                 ) {
                     Column(
                         modifier = Modifier
@@ -161,6 +146,21 @@ fun BenchmarkScreen(
                 }
             }
         }
+
+        // Selected model card and loading metrics
+        if (showModelCard) {
+            selectedModel?.let { model ->
+                Box(
+                    modifier = Modifier.padding(start = 16.dp, top = 16.dp, end = 16.dp)
+                ) {
+                    ModelCardWithLoadingMetrics(
+                        model = model,
+                        loadingMetrics = loadingMetrics,
+                        isExpanded = isModelCardExpanded,
+                        onExpanded = { isModelCardExpanded = !isModelCardExpanded },
+                    )
+                }
+            }
         }
     }
 

examples/llama.android/app/src/main/java/com/example/llama/revamp/ui/screens/ConversationScreen.kt

@@ -9,6 +9,7 @@ import androidx.compose.animation.core.infiniteRepeatable
 import androidx.compose.animation.core.rememberInfiniteTransition
 import androidx.compose.animation.core.tween
 import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.PaddingValues
@@ -26,19 +27,11 @@ import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.lazy.rememberLazyListState
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.filled.Send
 import androidx.compose.material3.Card
 import androidx.compose.material3.CardDefaults
-import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.HorizontalDivider
-import androidx.compose.material3.Icon
-import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.OutlinedTextField
-import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
-import androidx.compose.material3.TextFieldDefaults
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.LaunchedEffect
@@ -52,15 +45,12 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
-import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.graphics.StrokeCap
 import androidx.compose.ui.text.font.FontStyle
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.LifecycleEventObserver
 import androidx.lifecycle.compose.LocalLifecycleOwner
-import com.example.llama.revamp.APP_NAME
 import com.example.llama.revamp.data.model.ModelInfo
 import com.example.llama.revamp.engine.ModelLoadingMetrics
 import com.example.llama.revamp.ui.components.ModelCardContentArchitectureRow
@@ -84,11 +74,14 @@ fun ConversationScreen(
 ) {
     // View model states
     val engineState by viewModel.engineState.collectAsState()
-    val messages by viewModel.messages.collectAsState()
-    val systemPrompt by viewModel.systemPrompt.collectAsState()
-    val selectedModel by viewModel.selectedModel.collectAsState()
     val unloadDialogState by viewModel.unloadModelState.collectAsState()
 
+    val showModelCard by viewModel.showModelCard.collectAsState()
+    val selectedModel by viewModel.selectedModel.collectAsState()
+    val systemPrompt by viewModel.systemPrompt.collectAsState()
+
+    val messages by viewModel.messages.collectAsState()
+
     val isGenerating = engineState is State.Generating
 
     // UI states
@@ -140,6 +133,7 @@ fun ConversationScreen(
             listState = listState,
         )
 
+        if (showModelCard) {
             selectedModel?.let {
                 Box(
                     modifier = Modifier.fillMaxWidth().padding(16.dp).align(Alignment.TopCenter)
@@ -154,6 +148,7 @@ fun ConversationScreen(
                 }
             }
         }
+    }
 
     // Unload confirmation dialog
     ModelUnloadDialogHandler(
@@ -225,6 +220,7 @@ private fun ConversationMessageList(
         state = listState,
         modifier = Modifier.fillMaxSize(),
         contentPadding = PaddingValues(horizontal = 16.dp, vertical = 16.dp),
+        verticalArrangement = Arrangement.Bottom,
     ) {
         items(
             items = messages,

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

@@ -20,9 +20,8 @@ import javax.inject.Inject
 class BenchmarkViewModel @Inject constructor(
     private val benchmarkService: BenchmarkService
 ) : ModelUnloadingViewModel(benchmarkService) {
-    /**
+
-     * UI states
+    // Data
-     */
     val selectedModel: StateFlow<ModelInfo?> = benchmarkService.currentSelectedModel
 
     private val _benchmarkDuration = MutableSharedFlow<Long>()
@@ -30,6 +29,14 @@ class BenchmarkViewModel @Inject constructor(
     private val _benchmarkResults = MutableStateFlow<List<BenchmarkResult>>(emptyList())
     val benchmarkResults: StateFlow<List<BenchmarkResult>> = _benchmarkResults.asStateFlow()
 
+     // UI state: Model card
+    private val _showModelCard = MutableStateFlow(true)
+    val showModelCard = _showModelCard.asStateFlow()
+
+    fun toggleModelCard(show: Boolean) {
+        _showModelCard.value = show
+    }
+
     init {
         viewModelScope.launch {
             benchmarkService.benchmarkResults

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

@@ -28,11 +28,19 @@ class ConversationViewModel @Inject constructor(
     val selectedModel = conversationService.currentSelectedModel
     val systemPrompt = conversationService.systemPrompt
 
-    // Messages state
+    // UI state: Model card
+    private val _showModelCard = MutableStateFlow(true)
+    val showModelCard = _showModelCard.asStateFlow()
+
+    fun toggleModelCard(show: Boolean) {
+        _showModelCard.value = show
+    }
+
+    // UI state: conversation messages
     private val _messages = MutableStateFlow<List<Message>>(emptyList())
     val messages: StateFlow<List<Message>> = _messages.asStateFlow()
 
-    // Input text field state
+    // UI state: Input text field
     val inputFieldState = TextFieldState()
 
     // Token generation job