CODEWITHSUNDEEP
androidandroid-view
user481610
user481610

Reputation: 3270

How to determine if a View has been rotated

As the title suggests, I would like to know programmatically if a given View has been rotated already. Here is my animation function:

public static void AnimateArrowDown(View v)
    {
        RotateAnimation anim = new RotateAnimation(0.0f, 90.0f, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
        anim.setInterpolator(new LinearInterpolator());
        anim.setDuration(200);
        anim.setFillAfter(true);
        v.findViewById(R.id.arrow_imageview).startAnimation(anim);
    }

I'm animating an arrow right to down inside a ListView. My problem is when the view is redraw for some list elements the arrow previously rotated for another list item gets passed to this new list item. Hence, I would like to determine if the arrow in the ListView has been rotated and if so then rotate the arrow to its actual position.

Upvotes: 1

Views: 65

Answers (1)

hata
hata

Reputation: 12478

You can use View.getRotation method.

float rotation = v.findViewById(R.id.arrow_imageview).getRotation();

Then you can determine the value is default (0.0f; not rotated) or not (90.0f; rotated).

(Note: However, I would also prefer another approach using state flags like Saehun Sean Oh mentions in his comment. I don't think they need to be static but to be field members, and keep boolean states there.)

Upvotes: 2

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