1 files changed, 61 insertions, 0 deletions
diff --git a/RotaryPlayground/src/com/android/car/rotaryplayground/RotaryCards.java b/RotaryPlayground/src/com/android/car/rotaryplayground/RotaryCards.java
index 28f34a1..730c7c5 100644
--- a/RotaryPlayground/src/com/android/car/rotaryplayground/RotaryCards.java
+++ b/RotaryPlayground/src/com/android/car/rotaryplayground/RotaryCards.java
@@ -16,13 +16,18 @@
 
 package com.android.car.rotaryplayground;
 
+import android.graphics.drawable.Drawable;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.Button;
+
 import androidx.annotation.Nullable;
 import androidx.fragment.app.Fragment;
 
+import com.android.car.ui.FocusArea;
+
 /** Fragment to demo a layout with cards that are FocusArea containers. */
 public class RotaryCards extends Fragment {
 
@@ -30,6 +35,62 @@ public class RotaryCards extends Fragment {
     public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
             @Nullable Bundle savedInstanceState) {
         View view = inflater.inflate(R.layout.rotary_cards, container, false);
+
+        // This button will be removed and immediately added back after click. So the focus
+        // highlight will jump to another view after rotary click.
+        FocusArea focusArea5 = view.findViewById(R.id.focus_area5);
+        Button button5a = view.findViewById(R.id.button_5a);
+        button5a.setOnClickListener(v -> {
+            int index = focusArea5.indexOfChild(button5a);
+            focusArea5.removeView(button5a);
+            focusArea5.addView(button5a, index);
+        });
+
+        // The background of this button will be changed after click. The focus highlight will stay
+        // on this Button after click.
+        Button button5b = view.findViewById(R.id.button_5b);
+        boolean[] stopped = {false};
+        button5b.setOnClickListener(v -> {
+            stopped[0] = !stopped[0];
+            Drawable drawable = view.getContext().getDrawable(
+                    stopped[0] ? R.drawable.ic_stop : R.drawable.ic_play_arrow);
+            button5b.setBackground(drawable);
+        });
+
+        // This button will be removed and immediately added back after click. It's not focusable
+        // but its container is focusable. The focus highlight will stay on the container after
+        // click.
+        ViewGroup button5cContainer = view.findViewById(R.id.button_5c_container);
+        Button button5c = view.findViewById(R.id.button_5c);
+        button5c.setFocusable(false);
+        button5cContainer.setOnClickListener(v -> {
+            button5cContainer.removeView(button5c);
+            button5cContainer.addView(button5c, 0);
+        });
+
+        // This button will be removed then added back and request focus explicitly after click.
+        // So the focus highlight will jump to another view then jump back after rotary click.
+        Button button5d = view.findViewById(R.id.button_5d);
+        button5d.setOnClickListener(v -> {
+            boolean needRestoreFocus = button5d.isFocused();
+            int index = focusArea5.indexOfChild(button5d);
+            focusArea5.removeView(button5d);
+            focusArea5.addView(button5d, index);
+            if (needRestoreFocus) {
+                button5d.requestFocus();
+            }
+        });
+
+        // This button will be disabled after click. So the focus highlight will jump to another
+        // view after rotary click.
+        Button button5e = view.findViewById(R.id.button_5e);
+        button5e.setOnClickListener(v -> button5e.setEnabled(!button5e.isEnabled()));
+
+        // This button will appear disabled but is not disabled after click. So the focus
+        // highlight will stay after rotary click.
+        CustomButton button5f = view.findViewById(R.id.button_5f);
+        button5f.setOnClickListener(v -> button5f.setRotaryEnabled(!button5f.isRotaryEnabled()));
+
         return view;
     }
 }