Here is how my app looks
I have a horizontal suppressed recyclerview and once the user clicks an answer it smoothscrolls to the next one
, tho I wanted to prevent clicks while the smooth scrolling is still going
I used a handler and had many try and error until I got it to work on phones,
however, it isn't practical and doesn't work the same for every phone
public void setSmoothScroller(final float speed){
smoothScroller = new LinearSmoothScroller(getApplicationContext()) {
private final float SPEED = speed;
#Override
protected float calculateSpeedPerPixel(DisplayMetrics displayMetrics) {
return SPEED / displayMetrics.densityDpi;
}
};
}
it could be complicated trying to explain but all i need is instead of using handlers to enable touching again , is there a way to make it automatically perform a function on reaching the specific position
#Override
public void onAnswered(final int position) {
if (answered < bank){
handler.postDelayed(new Runnable() {
#Override
public void run() {
scrollingState = true;
recyclerView.suppressLayout(true);
setSmoothScroller(300f);
smoothScroller.setTargetPosition(position + 1);
layoutManager.startSmoothScroll(smoothScroller);
}
}, 1000);
handler.postDelayed(new Runnable() {
#Override
public void run() {
enableTouch();
}
}, 3150);
}
}
I'm quite new to Android Studio, and I would like to animate multiple images at the same time, over multiple coordinates.
Let's say I would like to move image A from 0/0 to 100/100, and then to 200/200; at the same time (eg. by the click of a button), image B shall be moved from 0/100 to 100/100, and then to 200/100. All with simple translations.
(As a plus, I would like to be able to set the duration of the movements independently.)
When the animations have finished, there should be an event (somthing like OnAnimationFinish?) to trigger other things, like enabling the start button again.
What would be the most effective way to do this? I know there is an AnimationSet in Android to store multiple animations, but I don't know if this is helpful here.
Thanks in advance!
You can use ObjectAnimator with AnimatorSet to play multiple animations simultaneously with proper listeners.
For example():
val imageXAnimator = ObjectAnimator.ofFloat(imageView, "translationX", translateX)
val imageYAnimator = ObjectAnimator.ofFloat(imageView, "translationY", translateY)
val imageAlphaAnimator = ObjectAnimator.ofFloat(imageView, "alpha", if (reverse) 0F else 1F)
val animationSet = AnimatorSet()
animationSet.playTogether(
imageXAnimator,
imageYAnimator,
imageAlphaAnimator)
animationSet.interpolator = DecelerateInterpolator()
animationSet.duration = 1000
animationSet.addListener(
onStart = {
//When animation is started
},
onEnd = {
//When animation finishes
}
)
animationSet.start()
Or a simple extension in kotlin which can be called on a specific View:
inline fun View.animateTranslationY(translationY: Float, duration: Long = 1000, startDelay: Long = 0) {
val translationYAnimator = ObjectAnimator.ofFloat(this, "translationY", translationY)
translationYAnimator.duration = duration
translationYAnimator.startDelay = startDelay
translationYAnimator.interpolator = LinearInterpolator()
translationYAnimator.addAnimatorListener(
onStart = { },
onEnd = { }
)
translationYAnimator.start()
}
You can use the "View.animate()" method that allow you to access to its sub-methods and events to manage all these stuff. You just have to call "animate()" on a View (TextView, ImageView, EditBox, etc..) and then call its sub-methods to decide what kind of animation to perform: motion, rotation, changing transparency, etc... For each animation you can set a listener that will be called at Start and/or at the End of animation.
Consider these two methods for both views
private void animateFirstView(final ImageView first, long durationFirst, final long durationSecond) {
first.setTranslationX(0);
first.setTranslationY(0);
first.animate().translationX(100).translationY(100).setDuration(durationFirst).setListener(new Animator.AnimatorListener() {
#Override
public void onAnimationStart(Animator animation) {
}
#Override
public void onAnimationEnd(Animator animation) {
first.animate().translationY(200).translationX(200).setDuration(durationSecond).setListener(null).setInterpolator(new LinearInterpolator()).start();
}
#Override
public void onAnimationCancel(Animator animation) {
}
#Override
public void onAnimationRepeat(Animator animation) {
}
}).setInterpolator(new LinearInterpolator()).start();
}
private void animateSecondView(final ImageView second, long durationFirst, final long durationSecond) {
second.setTranslationX(0);
second.setTranslationY(100);
second.animate().translationX(100).translationY(100).setDuration(durationFirst).setListener(new Animator.AnimatorListener() {
#Override
public void onAnimationStart(Animator animation) {
}
#Override
public void onAnimationEnd(Animator animation) {
second.animate().translationY(200).translationX(100).setDuration(durationSecond).setListener(null).setInterpolator(new LinearInterpolator()).start();
}
#Override
public void onAnimationCancel(Animator animation) {
}
#Override
public void onAnimationRepeat(Animator animation) {
}
}).setInterpolator(new LinearInterpolator()).start();
}
You can do this:
private void playAnimation(final View view, final int endRangeY) {
view.animate().translationY(endRangeY) //endRangeY where you want to end the animation
.alpha(0.0f)
.setDuration(3000)
.setListener(new AnimatorListenerAdapter() {
#Override public void onAnimationEnd(Animator animation) {
super.onAnimationEnd(animation);
}
});
}
I have an requirement to show the text on Recyclerview with FadeIn & FadeOut animation.
Below is the dynamic list where it's need to loop infinite items i.e; 1-2-3-1-2-3-1-2-3
List<String> mImageDesc = new List<String>();
mImageDesc.add("1");
mImageDesc.add("2");
mImageDesc.add("3");
I have used below code but which is not working for me.
final Animation animationFadeIn = AnimationUtils.loadAnimation(mContext, R.anim.fade_in_animation);
final Animation animationFadeOut = AnimationUtils.loadAnimation(mContext, R.anim.fade_out_animation);
Animation.AnimationListener animListener = new Animation.AnimationListener(){
// Required to change the image
int i = 0;
#Override
public void onAnimationStart(Animation animation) {
}
#Override
public void onAnimationRepeat(Animation animation) {
}
#Override
public void onAnimationEnd(Animation animation) {
if (animation == animationFadeIn) {
// Start fade-out animation
mTxtImageDescription.startAnimation(animationFadeOut);
} else if (animation == animationFadeOut) {
*while(mImageDesc.listIterator().hasNext()) {
System.out.println(mImageDesc.listIterator().next());
mTxtImageDescription.setText(mImageDesc.listIterator().next());
mTxtImageDescription.startAnimation(animationFadeIn);*
}
}
}
};
// Set listener to animation
animationFadeIn.setAnimationListener(animListener);
animationFadeOut.setAnimationListener(animListener);
// Start fade-in animation
mTxtImageDescription.setText(mImageDesc.get(0));
mTxtImageDescription.startAnimation(animationFadeIn);
In the last line off your while loop you have RE-started the 'animationFadeIn' ,so
the 'animListener' callbacks will be called forever .Notice if while loop was that repeating you would have 'StackOverflowError'.
as i read in here : http://developer.android.com/reference/android/animation/ValueAnimator.html
i still dont understand how to make onAnimationEnd listener or something to do when ValueAnimator animation end. there is a part in there said:
Anyone can explain with some example code? Thank you!
You can do something like
ValueAnimator anim = ValueAnimator.ofInt(progress, seekBar.getMax());
anim.setDuration(Utility.setAnimationDuration(progress));
anim.addUpdateListener(new AnimatorUpdateListener()
{
#Override
public void onAnimationUpdate(ValueAnimator animation)
{
int animProgress = (Integer) animation.getAnimatedValue();
seekBar.setProgress(animProgress);
}
});
anim.addListener(new AnimatorListenerAdapter()
{
#Override
public void onAnimationEnd(Animator animation)
{
// done
//your stuff goes here
}
});
anim.start();
So I have implemenented a fragment of code which works perfectly found on another thread
The code is listed below :
private void animate(final ImageView imageView, final int images[], final int imageIndex, final boolean forever){
//imageView <-- The View which displays the images
//images[] <-- Holds R references to the images to display
//imageIndex <-- index of the first image to show in images[]
//forever <-- If equals true then after the last image it starts all over again with the first image resulting in an infinite loop. You have been warned.
int fadeInDuration = 500; // Configure time values here
int timeBetween = 3000;
int fadeOutDuration = 1000;
imageView.setVisibility(View.INVISIBLE); //Visible of invisible by default
imageView.setImageResource(images[imageIndex]);
Animation fadeIn = new AlphaAnimation(0, 1);
fadeIn.setInterpolator(new DecelerateInterpolator()); //Add this
fadeIn.setDuration(fadeInDuration);
Animation fadeOut = new AlphaAnimation(1, 0);
fadeOut.setInterpolator(new AccelerateInterpolator()); //and this
fadeOut.setStartOffset(fadeInDuration + timeBetween);
fadeOut.setDuration(fadeOutDuration);
AnimationSet animation = new AnimationSet(false); //change to false
animation.addAnimation(fadeIn);
animation.addAnimation(fadeOut);
animation.setRepeatCount(1);
imageView.setAnimation(animation);
animation.setAnimationListener(new AnimationListener() {
#Override
public void onAnimationEnd(Animation animation) {
if(images.length -1 > imageIndex){
animate(imageView, images, imageIndex + 1, forever); // Calls itself until it gets to the end of the array.
}
else{
if(forever == true){
animate(imageView, images, 0, forever); //Calls itself to start the animation all over again in a loop if forever = true
}
}
}
#Override
public void onAnimationRepeat(Animation animation) {
// TODO Auto-generated method stub
}
#Override
public void onAnimationStart(Animation animation) {
// TODO Auto-generated method stub
}
});
}
Basically this code accepts an Array of images and creates a slideshow with fadeIn and FadeOut effects. Once it reaches the end the animation stops. How can I modify the code to keep animating forever?
Found the solution Guys.
Just had to make a slight alteration! On the else statement I had to set Forever to false!
else{
if(forever == false){
animate(imageView, images, 0, forever);
}
}