Add a11y improvements

Author: simona-anomis

feature/camera/src/main/java/com/android/developers/androidify/camera/CameraCaptureButton.kt

@@ -40,6 +40,8 @@ import androidx.compose.ui.graphics.drawscope.Stroke
 import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.semantics.Role
+import androidx.compose.ui.semantics.contentDescription
+import androidx.compose.ui.semantics.semantics
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import com.android.developers.androidify.theme.AndroidifyTheme
@@ -78,6 +80,13 @@ internal fun CameraCaptureButton(
     val disabledColor = MaterialTheme.colorScheme.surfaceContainer
     val interactionSource = remember { MutableInteractionSource() }
     val animationSpec = MaterialTheme.motionScheme.defaultSpatialSpec<Float>()
+
+    val semanticsDescription = if (enabled) {
+        stringResource(R.string.capture_image_button_enabled_content_description)
+    } else {
+        stringResource(R.string.capture_image_button_disabled_content_description)
+    }
+
     Spacer(
         modifier
             .indication(interactionSource, ScaleIndicationNodeFactory(animationSpec))
@@ -90,6 +99,9 @@ internal fun CameraCaptureButton(
                 role = Role.Button,
                 onClickLabel = stringResource(R.string.cd_capture_button),
             )
+            .semantics {
+                contentDescription = semanticsDescription
+            }
             .size(size)
             .drawWithCache {
                 val outerPath = path.copy().apply {

feature/camera/src/main/res/values/strings.xml

@@ -25,6 +25,8 @@
     <string name="flip_camera_direction">Flip camera direction</string>
     <string name="rear_camera_description">Enable Rear Camera</string>
     <string name="camera_guide_text_label">Use guides to frame yourself for the perfect Bot</string>
+    <string name="capture_image_button_enabled_content_description">Capture image</string>
+    <string name="capture_image_button_disabled_content_description">Image capture disabled. Make sure your face is clearly visible in the frame.</string>
 
     <string-array name="camera_result_compliments">
         <item>Great shot!</item>

feature/home/src/main/java/com/android/developers/androidify/home/HomeScreen.kt

@@ -301,7 +301,7 @@ private fun VideoPlayerRotatedCard(
     modifier: Modifier = Modifier,
 ) {
     val aspectRatio = 280f / 380f
-    val videoInstructionText = stringResource(R.string.instruction_video_transcript)
+    val videoInstructionText = stringResource(R.string.video_card_content_description)
     Box(
         modifier = modifier
             .focusable()
@@ -457,7 +457,7 @@ private fun DancingBot(
     AsyncImage(
         model = dancingBotLink,
         modifier = modifier,
-        contentDescription = null,
+        contentDescription = stringResource(R.string.dancing_android_bot),
     )
 }
 

feature/home/src/main/res/values/strings.xml

@@ -37,4 +37,6 @@
     <string name="terms">Terms</string>
     <string name="privacy">Privacy</string>
     <string name="oss_license">Licenses</string>
+    <string name="video_card_content_description">A video showcasing the creation of an Android bot.</string>
+    <string name="dancing_android_bot">A dancing Android bot.</string>
 </resources>