CODEWITHSUNDEEP
androidanimation
giozh
giozh

Reputation: 10068

Rotation animation, slow it down

I need to slow down an rotate animation over an imageview: it begin faster, then it should "decelerate" until end of animation (then rotation stop). I've write this:

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >
<rotate
    android:duration="100"
    android:fromDegrees="0"
    android:interpolator="@android:anim/cycle_interpolator"
    android:pivotX="50%"
    android:pivotY="50%"
    android:repeatCount="30"
    android:repeatMode="restart"
    android:toDegrees="360" />

</set>

then add listener to animation:

Animation rotate = AnimationUtils
            .loadAnimation(activity, R.anim.rotate);
    ImageView logo = (ImageView) SplashScreen.activity
            .findViewById(R.id.logo);


    rotate.setAnimationListener(new AnimationListener() {

        @Override
        public void onAnimationStart(Animation animation) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onAnimationEnd(Animation animation) {
            Intent intent = new Intent(SplashScreen.this,
                    LoginActivity.class);
            SplashScreen.this.startActivity(intent);

        }

        @Override
        public void onAnimationRepeat(Animation animation) {
            if(animation.getRepeatCount() == 5) {
                animation.setDuration(200);
            } else if (animation.getRepeatCount() == 10) {
                Log.i("ANIM", "10");
                animation.setDuration(5000);
            } else if (animation.getRepeatCount() == 15) {
                animation.setDuration(800);
            } else if (animation.getRepeatCount() == 20) {
                animation.setDuration(1600);
            } else if (animation.getRepeatCount() == 25) {
                animation.setDuration(2000);
            } 

        }

    });

    logo.setAnimation(rotate);
    logo.startAnimation(rotate);

but animation has always the same velocity (code never go into onAnimationRepeat). What's wrong?

Upvotes: 2

Views: 4853

Answers (2)

Enoobong
Enoobong

Reputation: 1734

Simply use 

android:interpolator="@android:anim/decelerate_interpolator"

in your animation xml file. check this link for other interpolators http://developer.android.com/reference/android/view/animation/package-summary.html also add 

android:repeatCount="1"

because the default is 0.

Upvotes: 2

ZealDeveloper
ZealDeveloper

Reputation: 783

Try this :

<set xmlns:android="http://schemas.android.com/apk/res/android" >
<rotate
    android:duration="100"
    android:fromDegrees="0"
    android:interpolator="@android:anim/decelerate_interpolator"
    android:pivotX="50%"
    android:pivotY="50%"
    android:repeatCount="30"
    android:repeatMode="restart"
    android:toDegrees="360" />

</set>

Change interpolator cycle_interpolator to decelerate_interpolator so that you get an effect which is faster at beginning and gradually slows down.

Upvotes: 0

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