Develop Reference

How to properly implement the following scale / bounce animation?

I have the followin animation that scales an image from "invisible" to 60dp x 60dp adding a bounce effect. When this finishes it disappears with another scale effect
bounce_animation.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" android:shareInterpolator="false">
<set android:interpolator="#android:anim/bounce_interpolator">
<scale
android:fromXScale="0.1"
android:fromYScale="0.1"
android:toXScale="1.0"
android:toYScale="1.0"
android:pivotX="50%"
android:pivotY="50%"
android:duration="1600" />
</set>
<set>
<scale
android:startOffset="1900"
android:duration="200"
android:pivotX="50%"
android:pivotY="50%"
android:fromXScale="1.0"
android:fromYScale="1.0"
android:toXScale="0"
android:toYScale="0" />
</set>
</set>
This is my code to use this
MainActivity.java
final ImageView likeBig = findViewById(R.id.like_big);
final Animation bounceAnimation = AnimationUtils.loadAnimation(this, R.anim.bounce_animation);
bounceAnimation.setAnimationListener(new Animation.AnimationListener() {
#Override
public void onAnimationStart(Animation animation) {
likeBig.setVisibility(View.VISIBLE);
}
#Override
public void onAnimationEnd(Animation animation) {
likeBig.setVisibility(View.GONE);
}
#Override
public void onAnimationRepeat(Animation animation) {
}
});
The problem is that when I do likeBig.setVisibility(View.VISIBLE); image becomes visible for a fraction of a second in full size before the scale animation starts. I need the image to be invisible until the animation begins.
What's wrong with my approach?

I con only guess why the View is visible in full size at the beginning of the animation: maybe onAnimationStart() fires when the animation begins calculating the next changes but before the screen is updated for the first time?
That being said, you can use property animations instead of View animations to achieve the desired effect:
First, let your View have a size of just 1dp x 1dp in the beginning. Instead of setting a pivot, embed it at the center of a FrameLayout of size 60dp x 60dp. If required, you can set the visibility of the FrameLayout to GONE after the animation has finished (in this case, you need to register an Animator.AnimatorListener).
<FrameLayout
android:layout_width="60dp"
android:layout_height="60dp">
<ImageView
android:id="#+id/like_big"
android:layout_width="1dp"
android:layout_height="1dp"
android:layout_gravity="center"
android:src="#mipmap/ic_launcher"
android:background="#0000ff"/>
</FrameLayout>
Next, the animations:
ObjectAnimator growX = ObjectAnimator.ofFloat(like_big,"scaleX", 1f, 60.0f);
ObjectAnimator growY = ObjectAnimator.ofFloat(like_big,"scaleY", 1f, 60.0f);
AnimatorSet growAnim = new AnimatorSet();
growAnim.playTogether(growX, growY);
growAnim.setDuration(1600);
growAnim.setInterpolator(new BounceInterpolator());
ObjectAnimator shrinkX = ObjectAnimator.ofFloat(like_big,"scaleX", 60.0f, 0.0f);
ObjectAnimator shrinkY = ObjectAnimator.ofFloat(like_big,"scaleY", 60.0f, 0.0f);
AnimatorSet shrinkAnim = new AnimatorSet();
shrinkAnim.playTogether(shrinkX, shrinkY);
shrinkAnim.setDuration(200);
shrinkAnim.setInterpolator(new LinearInterpolator());
AnimatorSet animatorSet = new AnimatorSet();
animatorSet.playSequentially(growAnim, shrinkAnim);
Start the animation by calling
animatorSet.start();

ImageView to zoom out and scale the image animation in android

I want image to zoom out and scale as Twitter Splash screen animation but I am not able to first zoom out the image and scale. Here's is my code
imageView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
imageView.animate()
.setStartDelay(500)
.setDuration(1000)
.scaleX(20)
.scaleY(20)
.alpha(0);
}
});

You didn't mention scale from variable
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" android:fillAfter="true" >
<scale
xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="1000"
android:fromXScale="1.0"
android:fromYScale="1.0"
android:pivotX="50%"
android:pivotY="50%"
android:toXScale="0.5"
android:toYScale="0.5" >
</scale>
</set>

You can do almost any animations with ObjectAnimator and it's very smooth.
Here is a sample code. In this case image will scale up from 1x to 2x, You can adjust the values as your need.Now if you want to scale down then change 2x to 0.5x which will scale down image to 50% of original image.
ObjectAnimator scaleXAnimation = ObjectAnimator.ofFloat(imageView, "scaleX", 1.0f, 2.0f);
scaleXAnimation.setInterpolator(new AccelerateDecelerateInterpolator());
scaleXAnimation.setDuration(1500);
ObjectAnimator scaleYAnimation = ObjectAnimator.ofFloat(imageView, "scaleY", 1.0f, 2.0f);
scaleYAnimation.setInterpolator(new AccelerateDecelerateInterpolator());
scaleYAnimation.setDuration(1500);
ObjectAnimator alphaAnimation = ObjectAnimator.ofFloat(imageView, "alpha", 1.0F, 0F);
alphaAnimation.setInterpolator(new AccelerateDecelerateInterpolator());
alphaAnimation.setDuration(1500);
AnimatorSet animatorSet = new AnimatorSet();
animatorSet.play(scaleXAnimation).with(scaleYAnimation).with(alphaAnimation);
animatorSet.setStartDelay(500);
animatorSet.start();

Making textView loop a growing and shrinking animation

I am trying to make a TextView grow and then shrink. This process should be repeated infinitely. How do I achieve that? My scale.xml looks like this:
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<scale
android:fromXScale="1.0"
android:fromYScale="1.0"
android:toXScale="2.0"
android:toYScale="2.0"
android:duration="1400" />
</set>
Here's my animation method:
public void runAnimation() {
Animation a = AnimationUtils.loadAnimation(this, R.anim.scale);
a.setRepeatMode(Animation.REVERSE);
a.setRepeatCount(Animation.INFINITE);
a.reset();
textView.clearAnimation();
textView.startAnimation(a);
}
Now my problem is that the TextView grows, but then immediately reverses to the starting appereance. Why won't it go reverse, shrink and repeat the process?

Try this :
public void runAnimation() {
Animation a = AnimationUtils.loadAnimation(this, R.anim.scale);
a.setRepeatMode(Animation.REVERSE);
a.setRepeatCount(-1);
textView.clearAnimation();
textView.startAnimation(a);
}
EDIT
Here is my own code that is working right now :
Call animate like animate(textView)
public void animate (View view) {
mAnimation = new ScaleAnimation(0.3f,0.5f,0.3f,0.5f,Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.45f);
mAnimation.setDuration(300);
mAnimation.setRepeatCount(-1);
mAnimation.setRepeatMode(Animation.REVERSE);
mAnimation.setInterpolator(new AccelerateInterpolator());
mAnimation.setAnimationListener(new Animation.AnimationListener(){
#Override
public void onAnimationStart(Animation animation) {
}
#Override
public void onAnimationEnd(Animation animation) {
}
#Override
public void onAnimationRepeat(Animation animation) {
}
});
view.setAnimation(mAnimation);
}

Try this found on some blog. Works perfect for me.
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="#android:anim/linear_interpolator">
<scale
android:fromXScale="0.0"
android:toXScale="1.0"
android:fromYScale="0.0"
android:toYScale="1.0"
android:pivotX="50%"
android:pivotY="50%"
android:duration="2000" />
</set>

Here is a simple way to do so
ObjectAnimator scaleDown = ObjectAnimator.ofPropertyValuesHolder(textView,
PropertyValuesHolder.ofFloat("scaleX", 2.0f),
PropertyValuesHolder.ofFloat("scaleY", 2.0f));
scaleDown.setDuration(410);
scaleDown.setRepeatCount(ObjectAnimator.INFINITE);
scaleDown.setRepeatMode(ObjectAnimator.REVERSE);
scaleDown.start();
Hope it helps.

In your animation XML file add:
android:repeatCount="infinite"
And on your animation activity:
textmain.startAnimation(animationMainText);
animationMainText.setRepeatMode(Animation.REVERSE);

Edittext change width with animation

I want to make an edittext which aligns in its parent's left and when users click it, edittext's width'll increase to right side. Here is the code that i used. But when animation ended, edittext width come to first size.Can any one help me.?And is there any solution to set "fillparent" to width's final size in animation?
Animation scaleAnimation = new ScaleAnimation(0, -500, 1, 1);
scaleAnimation.setDuration(750);
editText.startAnimation(scaleAnimation);
I added scaleAnimation.setFillAfter(true); before animation starts but i get this;
After 750ms, edittext is going to its first width.

This will definitely work for you.
Dynamic way of doing this:
ScaleAnimation animate = new ScaleAnimation(1, 2, 1, 1, Animation.RELATIVE_TO_SELF, 0, Animation.RELATIVE_TO_SELF, 0);
animate.setDuration(700);
animate.setFillAfter(true);
target.startAnimation(animate);
Way of Using XML
scale.xml (Put this in res/anim folder)
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:fillAfter="true">
<scale
android:duration="400"
android:fillAfter="true"
android:fromXScale="1.0"
android:fromYScale="1.0"
android:pivotX="0%"
android:pivotY="0%"
android:toXScale="2.0"
android:toYScale="1.0" >
</scale>
</set>
Java Code:
Animation anim = AnimationUtils.loadAnimation(Anims.this, R.anim.scale);
mEdittext.startAnimation(anim);

Do this
Animation scaleAnimation = new ScaleAnimation(0, -500, 1, 1);
scaleAnimation.setDuration(750);
scaleAnimation.setFillAfter(true);
editText.startAnimation(scaleAnimation);

Give a try to this one.
Animation scaleAnimation = new ScaleAnimation(0, -500, 1, 1);
scaleAnimation.setDuration(750);
scaleAnimation.setAnimationListener(new AnimationListener() {
#Override
public void onAnimationStart(Animation animation) {}
#Override
public void onAnimationRepeat(Animation animation) {}
#Override
public void onAnimationEnd(Animation animation) {
//Set your editext width to match parent using layout params
}
});
editText.startAnimation(scaleAnimation);

Use
scaleAnimation.setFillAfter(true);
Or use ObjectAnimator:
ObjectAnimator animWidth = ObjectAnimator.ofInt(your_view, "width", startWidth,endWith);
animWidth.setDuration(yourDuration);
animWidth.start();

Android Frame Animation with AnimationDrawable stops when using inside TranslateAnimation

To all,
I have animated image with Frame animations that I'm moving from up behind a view and onto the screen. When the TranslateAnimation is done I want to keep the finish position so setFillAfter is set to true.
My issue is that the Frame Animation is stopped when the TranslateAnimation is finished. How can I restart or keep the Frame Animation going?
<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android"
id="selected" android:oneshot="false">
<item android:drawable="#drawable/a" android:duration="200" />
<item android:drawable="#drawable/b" android:duration="200" />
<item android:drawable="#drawable/c" android:duration="200" />
</animation-list>
loadingView = (RelativeLayout) findViewById(R.id.loadingBar);
loadingView.setVisibility(View.VISIBLE);
loadingImage = (ImageView) loadingView.findViewById(R.id.loading);
loadingImage.setBackgroundResource(R.drawable.loading);
animateImages = (AnimationDrawable) loadingImage.getBackground();
translateAnimation = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF, 0.0f,
Animation.RELATIVE_TO_SELF,0.0f, Animation.RELATIVE_TO_SELF, -1.0f);
translateAnimation.setInterpolator(new AccelerateInterpolator());
translateAnimation.setDuration(2000);
translateAnimation.setFillEnabled(true);
translateAnimation.setFillAfter(true);
translateAnimation.setAnimationListener(new AnimationListener()
{
#Override
public void onAnimationStart(Animation animation)
{
// TODO Auto-generated method stub
animateImages.start();
}
#Override
public void onAnimationEnd(Animation arg0)
{
}
#Override
public void onAnimationRepeat(Animation animation)
{
// TODO Auto-generated method stub
}
});
loadingView.startAnimation(translateAnimation);

I had the same issue, and couldn't find a definitive solution. So a workaround for me was adding a long animation at the end, almost without changes (a Translation animation moving just a few pixels after a long while), so the frame by frame animation keeps playing during some minutes. For my app that's enought. Maybe you find this idea useful.