I'm having some issues with MotionEvent. I want to show background changes when user presses the button (but not released yet), so OnClick might not be able to help. I noticed MotionEvent is able to detect pressed and released.
As result I have implemented a simple onTouch event as shown below:
@Override
public boolean onTouch(View v, MotionEvent event) {
if(event.getAction() == MotionEvent.ACTION_DOWN) {
// Make Background Changes
Log.i("DOWN", String.valueOf(getAdapterPosition()));
sparseBooleanArray.put(getAdapterPosition(), true);
notifyItemChanged(getAdapterPosition());
} else if (event.getAction() == MotionEvent.ACTION_UP) {
// Revert background to normal
Log.i("UP", String.valueOf(getAdapterPosition()));
sparseBooleanArray.put(getAdapterPosition(), false);
notifyItemChanged(getAdapterPosition());
}
return false;
}
This means when I press -> Background becomes green
And when I release -> Reverts back to original (white).
It works well on normal click, but when try long press, DOWN is being called, but when release UP is not being called.
So I need to perform normal click again to get the background back to normal.
Is it the original design, and I need to utilize OnLongClickedListener and manually revert back to normal when released.
Thank You.
It will be easier to use a state list as the background of your item, using the pressed state. See https://developer.android.com/guide/topics/resources/drawable-resource#StateList
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true"
android:drawable="@color/colorGreen" />
<!-- This is the default state item, at the end of the list -->
<item android:state_pressed="false"
android:drawable="@color/colorWhite" />
</selector>