UI: add "Learn More" hyperlinks to Error dialog upon model import failures

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

@@ -1,5 +1,6 @@
 package com.example.llama.ui.screens
 
+import android.content.Intent
 import androidx.activity.compose.BackHandler
 import androidx.compose.foundation.basicMarquee
 import androidx.compose.foundation.layout.Arrangement
@@ -17,6 +18,7 @@ import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.outlined.ContactSupport
 import androidx.compose.material.icons.filled.Attribution
 import androidx.compose.material.icons.filled.Download
 import androidx.compose.material.icons.filled.Error
@@ -45,14 +47,17 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.font.FontStyle
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.window.DialogProperties
+import androidx.core.net.toUri
 import com.example.llama.data.model.ModelInfo
 import com.example.llama.data.source.remote.HuggingFaceModel
+import com.example.llama.ui.components.InfoAction
 import com.example.llama.ui.components.InfoView
 import com.example.llama.ui.components.ModelCardFullExpandable
 import com.example.llama.ui.scaffold.ScaffoldEvent
@@ -185,6 +190,7 @@ fun ModelsManagementScreen(
                 ErrorDialog(
                     title = "Import Failed",
                     message = state.message,
+                    learnMoreUrl = state.learnMoreUrl,
                     onDismiss = { viewModel.resetManagementState() }
                 )
             }
@@ -662,8 +668,22 @@ private fun BatchDeleteConfirmationDialog(
 private fun ErrorDialog(
     title: String,
     message: String,
+    learnMoreUrl: String? = null,
     onDismiss: () -> Unit
 ) {
+    val context = LocalContext.current
+
+    val action = learnMoreUrl?.let { url ->
+         InfoAction(
+            label = "Learn More",
+            icon = Icons.AutoMirrored.Outlined.ContactSupport,
+            onAction = {
+                val intent = Intent(Intent.ACTION_VIEW, url.toUri())
+                context.startActivity(intent)
+            }
+        )
+    }
+
     AlertDialog(
         onDismissRequest = onDismiss,
         text = {
@@ -672,6 +692,7 @@ private fun ErrorDialog(
                 title = title,
                 icon = Icons.Default.Error,
                 message = message,
+                action = action
             )
         },
         confirmButton = {

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

@@ -212,10 +212,12 @@ class ModelsManagementViewModel @Inject constructor(
         } catch (_: InvalidFileFormatException) {
             _managementState.value = Importation.Error(
                 message = "Not a valid GGUF model!",
+                learnMoreUrl = "https://huggingface.co/docs/hub/en/gguf",
             )
         } catch (e: InsufficientStorageException) {
             _managementState.value = Importation.Error(
                 message = e.message ?: "Insufficient storage space to import $fileName",
+                learnMoreUrl = "https://support.google.com/android/answer/7431795?hl=en",
             )
         } catch (e: Exception) {
             Log.e(TAG, "Unknown exception importing $fileName", e)
@@ -382,8 +384,7 @@ sealed class ModelManagementState {
         data class Confirming(val uri: Uri, val fileName: String, val fileSize: Long) : Importation()
         data class Importing(val progress: Float = 0f, val fileName: String, val fileSize: Long, val isCancelling: Boolean = false) : Importation()
         data class Success(val model: ModelInfo) : Importation()
-        // TODO-han.yin: Add an optional explanation URL for more info!
-        data class Error(val message: String) : Importation()
+        data class Error(val message: String, val learnMoreUrl: String? = null) : Importation()
     }
 
     sealed class Download: ModelManagementState() {