I think the answer by @tmm1 is the best one so far. I have successfully implemented this workaround for the issue of elements loaded in a RecyclerView loosing focus if user uses the DPAD too quickly to scroll.
In my RecyclerView's adapter I use a LayoutInflater to inflate my element views like this
@Override
public ListItemViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
View itemView = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.item_keyboard_key, viewGroup, false);
return new ListItemViewHolder(itemView);
}
My item_keyboard_key.xml were originally defined like this
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/item_keyboard_key_layout"
android:orientation="vertical"
android:gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:id="@+id/item_keyboard_key_text"
android:text="A"/>
</FrameLayout>
Then I created a new custom FrameLayout class (FocusFixFrameLayout) extending FrameLayout and using this as my root layout. My item_keyboard_key.xml then became
<?xml version="1.0" encoding="utf-8"?>
<no.bluebit.views.FocusFixFrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/item_keyboard_key_layout"
android:orientation="vertical"
android:gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:id="@+id/item_keyboard_key_text"
android:text="A"/>
</no.bluebit.views.FocusFixFrameLayout>
and my FocusFixFrameLayout class looks like this
public class FocusFixFrameLayout extends FrameLayout {
public FocusFixFrameLayout(@NonNull Context context) {
super(context);
}
public FocusFixFrameLayout(@NonNull Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
}
public FocusFixFrameLayout(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
public FocusFixFrameLayout(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
}
@Override
public void clearFocus() {
if(this.getParent() != null)
super.clearFocus();
}
}