[Accessibility] #android #contentdescription #grouping #labelfor #traversal #announce

announce_accessibility.kt

override fun onCreate(savedInstanceState: Bundle?) {
 // … 

 addCoffee.setOnClickListener {
   coffeeRepo.increment()
   showCount()

   amountConsumed.announceForAccessibility(getString(R.string.count_updated, consumedString()))
 }
}

<resources>
  <string name="count_updated">Count updated %s</string>
</resources>

content_description.xml

<android.support.design.widget.FloatingActionButton
   android:id="@+id/addCoffee"
   ...                                                    
   android:contentDescription="@string/add_coffee"
   .../>

<resources>
  <string name="add_coffee">Add Coffee</string>
</resources>


<LinearLayout
	android:isImportantForAccessibility="no"/>

groupting.xml

<LinearLayout
   android:id="@+id/consumedContainer"
   ...              
   android:focusable="true"
   android:focusableInTouchMode="false"
   .../>

label_for.xml

<TextView
   ...          
   android:labelFor="@id/coffeeLimitValue"
   android:text="@string/coffee_limit_label"
   .../>


<resources>
  <string name="coffee_limit_label">Coffee Limit</string>
</resources>

traversal.xml

<android.support.design.widget.FloatingActionButton
   android:id="@+id/addCoffee"
   ...
   android:accessibilityTraversalBefore="@+id/consumedContainer"
   .../>