Rotate an Imagewith Animation

Question

What I Have

I have an arrow image (like the left one). Whe

Answer 1

Verified Code: (You can follow my solution)

imageView.setImageResource(R.drawable.ic_arrow_up);

boolean up = true;

if (!up) { 
    up = true; 
    imageView.startAnimation(animate(up)); 
} else { 
    up = false; 
    imageView.startAnimation(animate(up)); 
}

private Animation animate(boolean up) {
    Animation anim = AnimationUtils.loadAnimation(this, up ? R.anim.rotate_up : R.anim.rotate_down);
    anim.setInterpolator(new LinearInterpolator()); // for smooth animation
    return anim;
}

drawable/ic_arrow_up.xml

anim/rotate_up.xml

anim/rotate_down.xml

I used that code. Because this will save the animation state:

android:fillAfter="true"
android:fillEnabled="true"