Develop Reference

Fade in not working but fade out Animation works on Android

I use this method to show any view that need a fade in or a fade out Animation.
It works perfectly when I pass false to execute the fade out animation but when I pass true, the fade in doesn't execute, instead, It just appears after 500ms without animation;
private void setViewTransition(final boolean isVisible, final View view) {
Animation fadeAnim;
if (isVisible) {
fadeAnim = new AlphaAnimation(0.0f, 1.0f);
if (view.getAlpha() == 1.0f) {
return;
}
} else {
fadeAnim = new AlphaAnimation(1.0f, 0.0f);
if (view.getAlpha() == 0.0f) {
return;
}
}
fadeAnim.setDuration(500);
fadeAnim.setAnimationListener(new Animation.AnimationListener() {
#Override
public void onAnimationStart(Animation animation) {
}
#Override
public void onAnimationEnd(Animation animation) {
if (isVisible) {
view.setAlpha(1.0f);
} else {
view.setAlpha(0.0f);
}
}
#Override
public void onAnimationRepeat(Animation animation) {
}
});
view.startAnimation(fadeAnim);
}
It might be related to that issue: Android fade in not working which never got any answers...
What am I doing wrong ?

Although I'm not entirely sure why your way doesn't work. It is a bit roundabout and is probably more complicated than it needs to be to get a fade animation. Here's a really concise way of doing it instead (for API 12+).
private void setViewTransition(boolean isVisible, View view) {
view.animate().alpha(isVisible ? 1.0f : 0.0f).setDuration(500);
}

onTouch event on an animated view

I want to set a touch event on an animated view and then stop the animation on touching view.
Here is my activity code:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
touch_me = (TextView) findViewById(R.id.touch_me);
touch_me.setOnTouchListener(new OnTouchMeListener());
Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
int fromX = size.x;
int fromY = size.y;
int toX = (-1) * view.getWidth();
TranslateAnimation animation = new TranslateAnimation(fromX, -100, 0, 0);
animation.setDuration(6000);
animation.setRepeatCount(5);
animation.setFillAfter(true);
touch_me.startAnimation(animation);
}
Here is my class listener:
public class OnTouchMeListener implements View.OnTouchListener{
#Override
public boolean onTouch(View v, MotionEvent event) {
touch_me.clearAnimation();
return true;
}
}
The problem is that the onTouch is detected only on the initial position(in XML file) of the view
Can anyone help me please ?

ok, here's the problem.
the view animation you are using is from older system and it only simulates the animation, not move the positioning of the view. so when you touch the area where the view has moved, there is no reading on your touch so it gets ignored. but if you touch the area of the original position of the view, it will fire the touchevent callback method and cancel the animation per your code.
there are several approach to solve this.
one is this by calling onlayout and relocating the view each time there is a change in the animation by calling the view's onlayout method.
Button is not clickable after TranslateAnimation
or another is to change the view's touch area by using touchdelegate class
http://cyrilmottier.com/2012/02/16/listview-tips-tricks-5-enlarged-touchable-areas/
but i think these two options aren't very good approaches to your problem.
i would go with this third option:
use propertyanimation instead. it's different from older system in that it updates the values needed for changes instead of doing the actual animation. the actual animation is done inside the update method with your own algorithm.
http://developer.android.com/guide/topics/graphics/prop-animation.html
here is example:
ValueAnimator animTranslation = ValueAnimator.ofFloat(valueStart, valueEnd);
animTranslation.setDuration(300);
animTranslation.removeAllUpdateListeners();
animTranslation.removeAllListeners();
animTranslation.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
#Override
public void onAnimationUpdate(ValueAnimator animation) {
myView.setRotation(currValue - (Float) animation.getAnimatedValue());
}
}
});
animRotation2.addListener(new Animator.AnimatorListener() {
#Override
public void onAnimationStart(Animator animation) {
}
#Override
public void onAnimationEnd(Animator animation) {
}
#Override
public void onAnimationCancel(Animator animation) {
}
#Override
public void onAnimationRepeat(Animator animation) {
}
});

Translate a view and get click event

First of all please excuse me if this question is already asked.
I am new to android animations.
I want a view lets say an Image View (with animation i.e,smooth movement) to permanently move one position to some other position of the screen lets say if current X co-ordinate to X+50 and similarly Y co-ordinate to Y+50. I was able to move using XML translate animation file but not able to get click event after that.I am able to get click event at the original position in the layout not from the translated position.
Can anyone guide me to right track?
Thanks in advance.

The Animations you use are deprecated.. I show an example of ObjectAnimator class... And this sample is in a Fragment, so i write the whole onCreateView.
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main_screen, container, false);
ImageView image = (ImageView) rootView.findViewById(R.id.image);
ObjectAnimator translationY = ObjectAnimator.ofFloat(image, "translationY", 100);
translationY.setInterpolator(new AccelerateInterpolator());
ObjectAnimator translationX = ObjectAnimator.ofFloat(image, "translationX", 100);
translationX.setInterpolator(new AccelerateInterpolator());
AnimatorSet as = new AnimatorSet();
as.playTogether(translationX, translationY);
as.setDuration(2000);
as.start();
image.setOnClickListener(new View.OnClickListener() {
int sum = 0;
#Override
public void onClick(View v) {
Toast.makeText(getActivity(), "Clicked: " + sum++, Toast.LENGTH_SHORT).show();
}
});
return rootView;
}

Do animation programatically. Try this code. It may help
TranslateAnimation translateAnimation = new TranslateAnimation(float fromXDelta, float toXDelta, float fromYDelta, float toYDelta);
translateAnimation.setDuration(500);
translateAnimation.setAnimationListener(new Animation.AnimationListener() {
#Override
public void onAnimationStart(Animation animation) {
//before animation
}
#Override
public void onAnimationEnd(Animation animation) {
//after animation
}
#Override
public void onAnimationRepeat(Animation animation) {
}
});
imageView.startAnimation(translateAnimation);

You probably using view.startAnimation();. Key here is do your animation programatically.
do
Animation animation = AnimationUtils.loadAnimation (this.context, R.anim.your_translate_animation);
animation .setStartOffset (2000);
yourView.startAnimation (animation);
animation.setAnimationListener (new AnimationListener () {
#Override
public void onAnimationStart (Animation animation) {
}
#Override
public void onAnimationRepeat (Animation animation) {
}
#Override
public void onAnimationEnd (Animation animation) {
//do you click functionality here...
}
});
P.S. If you want to click view programtically
do
yourView.performClick();

android translate animation clips the part of view not shown on screen

I have a Relative Layout containing some textviews which floats over a gridview. When I select an item in the grid, the layout moves down to nearly the end of the screen and only about 1/5th of it is visible. This is done using simple Translate Animation. Now when I click another button in the grid, I need to Relative Layout to move back to its original position on top of the gridview. I did this also with Translate Animation and this is happnening, but only the portion of the RelativeLayout which was visible when it was collapsed is translating (moving) and the other portion becomes visible after animation has ended. This looks really ugly.
I know that Android doesnt draw the portion of the view that is not visible on the screen. Is there a way to force draw the full portion ?
My Animation code is given below:
public void smoothExpanderAnimate(final int finalTarget,final RelativeLayout expander,final int animateToY,final boolean setExpanded,final boolean refreshGrid)
{
final RelativeLayout.LayoutParams head_params = (RelativeLayout.LayoutParams)expander.getLayoutParams();
TranslateAnimation anim = new TranslateAnimation(0f, 0f, 0f, animateToY);
anim.setDuration(400);
//timeListHeight = list.getHeight();
//anim.setFillAfter(true);
anim.setAnimationListener(new AnimationListener() {
#Override
public void onAnimationStart(Animation animation) {
//Should I try something here ?
}
#Override
public void onAnimationRepeat(Animation animation) {
}
#Override
public void onAnimationEnd(Animation animation) {
head_params.topMargin = finalTarget;
expander.clearAnimation();
expander.setLayoutParams(head_params);
isExpanded = setExpanded;
isAnimating = false;
if(!setExpanded)
{
setChildHeight(timeListHeight, list);
}
}
});
isAnimating = true;
expander.startAnimation(anim);
}

I found a solution for this.
If you dont need to support lower API levels and are fine with API level 11 onwards, you can use ObjectAnimator for this. ObjectAnimator has a translatey method which works quite well.
If you need to support API 8 onwards, you need to make sure your view comes within the bounds of the screen and then animates. The following code modification did the trick.
I know it seems very weird, do let me know if there is a better way to do this.
public void smoothExpanderAnimate(boolean addSpecialFix,final int finalTarget,final RelativeLayout expander,final int animateToY,final boolean setExpanded,final boolean refreshGrid)
{
final RelativeLayout.LayoutParams head_params = (RelativeLayout.LayoutParams)expander.getLayoutParams();
TranslateAnimation anim = new TranslateAnimation(0f, 0f, 0f, animateToY);
anim.setDuration(400);
expander.setVisibility(View.INVISIBLE); //Make View invisible
if(isExpanded && addSpecialFix){
//THIS IS THE FIX
int old = head_params.topMargin;
head_params.topMargin = finalTarget;
expander.clearAnimation();
expander.setLayoutParams(head_params); //move invisible view to the final position
anim = new TranslateAnimation(0f, 0f, old-closedY, 0);
Log.d("asdasd", old+"");
anim.setDuration(400);
}
//timeListHeight = list.getHeight();
//anim.setFillAfter(true);
anim.setAnimationListener(new AnimationListener() {
#Override
public void onAnimationStart(Animation animation) {
}
#Override
public void onAnimationRepeat(Animation animation) {
}
#Override
public void onAnimationEnd(Animation animation) {
head_params.topMargin = finalTarget;
expander.clearAnimation();
expander.setLayoutParams(head_params);
isExpanded = setExpanded;
isAnimating = false;
expander.setVisibility(View.VISIBLE);
if(refreshGrid)
{
mCalAdapter.notifyDataSetChanged();
}
if(!setExpanded)
{
setListHeight(timeListHeight, list);
}
}
});
isAnimating = true;
expander.startAnimation(anim);
}

View still captures touche events after being moved

In my android app I have a view which is laid on top of another view. When I click a button this top view is animated and goes out of screen. The problem is that it is like the view is still "there" as it captures all touch events and they do not get passed to the view which is behind.
This is the code that animates the view away:
TranslateAnimation animation = new TranslateAnimation (0, 0, 0, height);
animation.setDuration(1000);
animation.setFillAfter(true);
topView.startAnimation(animation);
What can I do to solve this problem?

Create an animation Listener and remove the view from its parent when the animation is over.
Animation animation = new AlphaAnimation(0 ,0);
animation.setAnimationListener(new AnimationListener() {
public void onAnimationStart(Animation animation) {
// TODO Auto-generated method stub
}
public void onAnimationRepeat(Animation animation) {
// TODO Auto-generated method stub
}
public void onAnimationEnd(Animation animation) {
parentView.removeView(topView)
}
});