android/ui: more UI tweaks

1. Add title to internal debug options

Updates tailscale/corp#19045

Signed-off-by: Percy Wegmann <percy@tailscale.com>

android/src/main/java/com/tailscale/ipn/MainActivity.kt

@@ -22,6 +22,8 @@ import androidx.activity.result.ActivityResultLauncher
 import androidx.activity.result.contract.ActivityResultContract
 import androidx.browser.customtabs.CustomTabsIntent
 import androidx.compose.animation.core.tween
+import androidx.compose.animation.fadeIn
+import androidx.compose.animation.fadeOut
 import androidx.compose.animation.slideInHorizontally
 import androidx.compose.animation.slideOutHorizontally
 import androidx.compose.material3.MaterialTheme
@@ -159,7 +161,9 @@ class MainActivity : ComponentActivity() {
                           onNavigateToMullvadCountry = { navController.navigate("mullvad/$it") },
                           onNavigateToRunAsExitNode = { navController.navigate("runExitNode") })
 
-                  composable("main") { MainView(navigation = mainViewNav) }
+                  composable("main", enterTransition = { fadeIn(animationSpec = tween(150)) }) {
+                    MainView(navigation = mainViewNav)
+                  }
                   composable("settings") { SettingsView(settingsNav) }
                   composable("exitNodes") { ExitNodePicker(exitNodePickerNav) }
                   composable("mullvad") { MullvadExitNodePickerList(exitNodePickerNav) }
@@ -188,7 +192,9 @@ class MainActivity : ComponentActivity() {
                   composable("permissions") {
                     PermissionsView(backTo("settings"), ::openApplicationSettings)
                   }
-                  composable("intro") { IntroView(backTo("main")) }
+                  composable("intro", exitTransition = { fadeOut(animationSpec = tween(150)) }) {
+                    IntroView(backTo("main"))
+                  }
                 }
 
             // Show the intro screen one time

android/src/main/java/com/tailscale/ipn/ui/util/Lists.kt

@@ -28,7 +28,7 @@ object Lists {
   @Composable
   fun SectionDivider(title: String? = null) {
     Box(Modifier.size(0.dp, 16.dp))
-    title?.let { SectionTitle(title) }
+    title?.let { LargeTitle(title) }
   }
 
   @Composable
@@ -37,7 +37,7 @@ object Lists {
   }
 
   @Composable
-  fun SectionTitle(
+  fun LargeTitle(
       title: String,
       bottomPadding: Dp = 0.dp,
       style: TextStyle = MaterialTheme.typography.titleMedium,
@@ -56,6 +56,20 @@ object Lists {
         }
   }
 
+  @Composable
+  fun MutedHeader(text: String) {
+    Box(
+        modifier =
+            Modifier.fillMaxWidth()
+                .background(color = MaterialTheme.colorScheme.surface, shape = RectangleShape)) {
+          Text(
+              modifier = Modifier.padding(start = 16.dp, top = 16.dp),
+              text = text,
+              style = MaterialTheme.typography.titleSmall,
+              color = MaterialTheme.colorScheme.onSurfaceVariant)
+        }
+  }
+
   @Composable
   fun InfoItem(text: CharSequence, onClick: (() -> Unit)? = null) {
     val style =
@@ -69,6 +83,14 @@ object Lists {
           }
         })
   }
+
+  @Composable
+  fun MultilineDescription(headlineContent: @Composable () -> Unit) {
+    ListItem(
+        headlineContent = {
+          Box(modifier = Modifier.padding(vertical = 8.dp)) { headlineContent() }
+        })
+  }
 }
 
 /** Similar to items() but includes a horizontal divider between items. */

android/src/main/java/com/tailscale/ipn/ui/view/BugReportView.kt

@@ -10,7 +10,6 @@ import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.text.ClickableText
 import androidx.compose.foundation.verticalScroll
-import androidx.compose.material3.ListItem
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Scaffold
 import androidx.compose.runtime.Composable
@@ -38,14 +37,18 @@ fun BugReportView(backToSettings: BackNavigation, model: BugReportViewModel = vi
 
   Scaffold(topBar = { Header(R.string.bug_report_title, onBack = backToSettings) }) { innerPadding
     ->
-    Column(modifier = Modifier.padding(innerPadding).fillMaxWidth().fillMaxHeight().verticalScroll(rememberScrollState())) {
-      ListItem(
-          headlineContent = {
+    Column(
+        modifier =
+            Modifier.padding(innerPadding)
+                .fillMaxWidth()
+                .fillMaxHeight()
+                .verticalScroll(rememberScrollState())) {
+          Lists.MultilineDescription {
             ClickableText(
                 text = contactText(),
                 style = MaterialTheme.typography.bodyMedium,
                 onClick = { handler.openUri(Links.SUPPORT_URL) })
-          })
+          }
 
           ClipboardValueView(bugReportID, title = stringResource(R.string.bug_report_id))
 

android/src/main/java/com/tailscale/ipn/ui/view/MainView.kt

@@ -322,7 +322,8 @@ fun PeerList(
 ) {
   val peerList = viewModel.peers.collectAsState(initial = emptyList<PeerSet>())
   val searchTermStr by viewModel.searchTerm.collectAsState(initial = "")
-  val showNoResults = derivedStateOf { searchTermStr.isNotEmpty() && peerList.value.isEmpty() }.value
+  val showNoResults =
+      derivedStateOf { searchTermStr.isNotEmpty() && peerList.value.isEmpty() }.value
   val netmap = viewModel.netmap.collectAsState()
 
   val focusManager = LocalFocusManager.current
@@ -373,7 +374,7 @@ fun PeerList(
                     .fillMaxSize()
                     .background(color = MaterialTheme.colorScheme.surface))
 
-            Lists.SectionTitle(
+            Lists.LargeTitle(
                 stringResource(id = R.string.no_results),
                 bottomPadding = 8.dp,
                 style = MaterialTheme.typography.bodyMedium,
@@ -394,7 +395,7 @@ fun PeerList(
                     .fillMaxSize()
                     .background(color = MaterialTheme.colorScheme.surface))
 
-            Lists.SectionTitle(
+            Lists.LargeTitle(
                 peerSet.user?.DisplayName ?: stringResource(id = R.string.unknown_user),
                 bottomPadding = 8.dp,
                 style = MaterialTheme.typography.titleLarge,

android/src/main/java/com/tailscale/ipn/ui/view/PeerDetails.kt

@@ -9,7 +9,6 @@ import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
-import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.lazy.LazyColumn
@@ -24,7 +23,6 @@ import androidx.compose.runtime.Composable
 import androidx.compose.runtime.collectAsState
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.graphics.RectangleShape
 import androidx.compose.ui.platform.LocalClipboardManager
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.painterResource
@@ -81,17 +79,7 @@ fun PeerDetails(
             modifier = Modifier.padding(innerPadding),
         ) {
           item(key = "tailscaleAddresses") {
-            Box(
-                modifier =
-                    Modifier.fillMaxWidth()
-                        .background(
-                            color = MaterialTheme.colorScheme.surface, shape = RectangleShape)) {
-                  Text(
-                      modifier = Modifier.padding(start = 16.dp, top = 16.dp),
-                      text = stringResource(R.string.tailscale_addresses),
-                      style = MaterialTheme.typography.titleSmall,
-                      color = MaterialTheme.colorScheme.onSurfaceVariant)
-                }
+            Lists.MutedHeader(stringResource(R.string.tailscale_addresses))
           }
 
           itemsWithDividers(node.displayAddresses, key = { it.address }) {

android/src/main/java/com/tailscale/ipn/ui/view/SettingsView.kt

@@ -97,6 +97,7 @@ fun SettingsView(settingsNav: SettingsNav, viewModel: SettingsViewModel = viewMo
           // TODO: put a heading for the debug section
           if (BuildConfig.DEBUG) {
             Lists.SectionDivider()
+            Lists.MutedHeader(text = stringResource(R.string.internal_debug_options))
             Setting.Text(R.string.mdm_settings, onClick = settingsNav.onNavigateToMDMSettings)
           }
         }

android/src/main/java/com/tailscale/ipn/ui/view/TailnetLockSetupView.kt

@@ -3,7 +3,6 @@
 
 package com.tailscale.ipn.ui.view
 
-import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
@@ -24,7 +23,6 @@ import androidx.compose.ui.text.SpanStyle
 import androidx.compose.ui.text.buildAnnotatedString
 import androidx.compose.ui.text.style.TextDecoration
 import androidx.compose.ui.text.withStyle
-import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import com.tailscale.ipn.R
 import com.tailscale.ipn.ui.Links
@@ -88,15 +86,12 @@ fun TailnetLockSetupView(
 private fun ExplainerView() {
   val handler = LocalUriHandler.current
 
-  ListItem(
-      headlineContent = {
-        Box(modifier = Modifier.padding(vertical = 8.dp)) {
+  Lists.MultilineDescription {
     ClickableText(
         explainerText(),
         onClick = { handler.openUri(Links.TAILNET_LOCK_KB_URL) },
         style = MaterialTheme.typography.bodyMedium)
   }
-      })
 }
 
 @Composable

android/src/main/res/values/strings.xml

@@ -47,6 +47,7 @@
     <string name="about_tailscale">About Tailscale</string>
     <string name="bug_report">Bug report</string>
     <string name="use_ts_dns">Use Tailscale DNS</string>
+    <string name="internal_debug_options">Internal debug options</string>
 
     <!-- Strings for the main screen -->
     <string name="exit_node">EXIT NODE</string>