Question

I want to rotate image dynamically(Not by XML code). I am using this code to rotate the Image:

public void rotateAnimation(){
    // Create an animation instance
    Animation an = new RotateAnimation(30, 360);

    // Set the animation's parameters
    an.setDuration(2000);               // duration in ms
    an.setRepeatCount(0);                // -1 = infinite repeated
    an.setRepeatMode(Animation.REVERSE); // reverses each repeat
    an.setFillAfter(true);               // keep rotation after animation


    // Aply animation to image view
    scanCircle.setAnimation(an);
}

Using this code, My ImageView get rotate but its not on its position but outside to its position. I want is to rotate it on its own position.

So, How to make it possible ?

Answer 1

i think position pivotx & pivotY will helpful http://developer.android.com/reference/android/view/animation/RotateAnimation.html#RotateAnimation%28float,%20float,%20float,%20float%29

RotateAnimation(float fromDegrees, float toDegrees, float pivotX, float pivotY)

suppose if you want to rotate from middle then

RotateAnimation(30, 360, totalWidth/2, totalHeight/2)