android: accessibility fixes (#359)

Updates tailscale/corp#18976

Signed-off-by: kari-ts <kari@tailscale.com>

android/src/main/java/com/tailscale/ipn/ui/theme/Theme.kt

@@ -86,11 +86,11 @@ private val LightColors =
 
 private val DarkColors =
     darkColorScheme(
-        primary = Color(0xFF4B70CC), // blue-500
+        primary = Color(0xFF3E5DB3), // blue-600
         onPrimary = Color(0xFFFFFFFF), // white
         primaryContainer = Color(0xFFf0f5ff), // blue-0
-        onPrimaryContainer = Color(0xFF3f5eb3), // blue-600
+        onPrimaryContainer = Color(0xFF5A82DC), // blue-400
-        error = Color(0xFFB22D30), // red-500
+        error = Color(0xFFEF5350), // red-400
         onError = Color(0xFFFFFFFF), // white
         errorContainer = Color(0xFFfff6f4), // red-0
         onErrorContainer = Color(0xFF940822), // red-600
@@ -150,7 +150,7 @@ val ColorScheme.off: Color
       }
 
 val ColorScheme.link: Color
-  get() = primary
+  get() = onPrimaryContainer
 
 /**
  * Main color scheme for list items, uses onPrimaryContainer color for leading and trailing icons.
@@ -248,7 +248,7 @@ val ColorScheme.warningListItem: ListItemColors
         containerColor = MaterialTheme.colorScheme.warning,
         headlineColor = MaterialTheme.colorScheme.onPrimary,
         leadingIconColor = MaterialTheme.colorScheme.onPrimary,
-        overlineColor = MaterialTheme.colorScheme.onPrimary.copy(alpha = 0.7f),
+        overlineColor = MaterialTheme.colorScheme.onPrimary.copy(alpha = 0.8f),
         supportingTextColor = MaterialTheme.colorScheme.onPrimary,
         trailingIconColor = MaterialTheme.colorScheme.onPrimary,
         disabledHeadlineColor = default.disabledHeadlineColor,
@@ -272,12 +272,20 @@ val ColorScheme.secondaryButton: ButtonColors
   @Composable
   get() {
     val defaults = ButtonDefaults.buttonColors()
+    if (isSystemInDarkTheme()) {
+      return ButtonColors(
+          containerColor = Color(0xFF4B70CC), // blue-500
+          contentColor = Color(0xFFFFFFFF), // white
+          disabledContainerColor = defaults.disabledContainerColor,
+          disabledContentColor = defaults.disabledContentColor)
+    } else {
       return ButtonColors(
-        containerColor = Color(0xFF6D94EC), // blue-400
+          containerColor = Color(0xFF5A82DC), // blue-400
           contentColor = Color(0xFFFFFFFF), // white
           disabledContainerColor = defaults.disabledContainerColor,
           disabledContentColor = defaults.disabledContentColor)
     }
+  }
 
 val ColorScheme.defaultTextColor: Color
   @Composable

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

@@ -38,7 +38,7 @@ import com.tailscale.ipn.ui.theme.logoBackground
 fun AboutView(backToSettings: BackNavigation) {
   val localClipboardManager = LocalClipboardManager.current
 
-  Scaffold(topBar = { Header(R.string.about_view_title, onBack = backToSettings) }) { innerPadding
+  Scaffold(topBar = { Header(R.string.about_view_header, onBack = backToSettings) }) { innerPadding
     ->
     Column(
         verticalArrangement =

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

@@ -17,9 +17,11 @@ import androidx.compose.runtime.remember
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
+import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import coil.annotation.ExperimentalCoilApi
 import coil.compose.AsyncImage
+import com.tailscale.ipn.R
 import com.tailscale.ipn.ui.model.IpnLocal
 
 @OptIn(ExperimentalCoilApi::class)
@@ -34,7 +36,10 @@ fun Avatar(profile: IpnLocal.LoginProfile?, size: Int = 50, action: (() -> Unit)
               indication = rememberRipple(bounded = false),
               onClick = action)
     }
-    Icon(imageVector = Icons.Default.Person, contentDescription = null, modifier = modifier)
+    Icon(
+        imageVector = Icons.Default.Person,
+        contentDescription = stringResource(R.string.settings_title),
+        modifier = modifier)
 
     profile?.UserProfile?.ProfilePicURL?.let { url ->
       AsyncImage(model = url, modifier = Modifier.size((size * 1.2f).dp), contentDescription = null)

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

@@ -110,7 +110,7 @@ fun ExitNodeItem(
         trailingContent = {
           Row {
             if (node.selected) {
-              Icon(Icons.Outlined.Check, contentDescription = stringResource(R.string.selected))
+              Icon(Icons.Outlined.Check, null)
             }
           }
         })
@@ -134,7 +134,7 @@ fun MullvadItem(nav: ExitNodePickerNav, count: Int, selected: Boolean) {
         },
         trailingContent = {
           if (selected) {
-            Icon(Icons.Outlined.Check, contentDescription = stringResource(R.string.selected))
+            Icon(Icons.Outlined.Check, null)
           }
         })
   }

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

@@ -71,7 +71,7 @@ fun BackArrow(action: () -> Unit) {
 
 @Composable
 fun CheckedIndicator() {
-  Icon(Icons.Default.CheckCircle, "selected", tint = ts_color_light_blue)
+  Icon(Icons.Default.CheckCircle, null, tint = ts_color_light_blue)
 }
 
 @Composable

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

@@ -25,6 +25,7 @@
     <string name="app_name">Tailscale</string>
     <string name="tile_name">Tailscale</string>
     <string name="version">Version</string>
+    <string name="about_view_header">About Tailscale</string>
     <string name="about_view_title">Tailscale for Android</string>
     <string name="acknowledgements">Acknowledgements</string>
     <string name="privacy_policy">Privacy Policy</string>