Develop Reference

Android Animations - Animate view to a specific position

I have a load screen/pop up screen which is a fragment which shows up whenever I call an API. I like how it looks currently, but I would like to liven it up by adding a bunch of animations to the views in the load screen.
I am using the property animation framework to good effect for
scaling and changing the alpha value(transparency) of views in their current positions.
I am now trying to get a view to animate(translate + alpha change) to it's current position in the static screen. I do not however, wish to hardcode values since this would clearly mess up the alignment of views and cause overlaps and other problems.
How do I translate a view from some point outside the screen, to it's current position in the static screen? Eg: In my static screen if I have a view that is centre aligned in the parent layout, how do I animate the view from a position outside the screen to this current position. I have tried the following but it does not work since it expects float values.
<set android:ordering="together">
<objectAnimator
android:duration="1500"
android:propertyName="y"
android:valueFrom="0"
android:valueTo="50%p"
android:valueType="floatType" />
<objectAnimator
android:duration="1500"
android:propertyName="alpha"
android:valueFrom="0"
android:valueTo="1"
android:valueType="floatType" />
</set>
I am trying to keep as much of the animation logic in xmls as possible.

After a little more research I came across the translationY(and translation X) attribute which seems to be the one I was looking for.

Android Translation animation

i am trying to animate an image view by ensuring that the object appears in the center of the screen and then translates up.. to its final position. the code i used is as follows.
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate
android:fromXDelta="0"
android:fromYDelta="400"
android:toYDelta="0"
android:duration="800"/>
</set>
This code works when u have a device of 4.7"(galaxy s3) screen size the image will appear at the center of the screen and then move to its set position. But on a screen of 4" (S advance or htc desire x) the image practically appears at the screen bottom.
So is there any way to ensure that the image is at the center of the screen heedless of the device on which the code is running?? Thanks in advance..

Use percentages instead of values to make the Animation uniform across all screen sizes.
The animation should apply its transformation after it ends
android:fillAfter="true"
The animation begins from the vertical center, i.e 50% of Y
android:fromYDelta="50%p"
The animation ends at the top, i.e. 0% of Y
android:toYDelta="0%p"
XML:
<set xmlns:android="http://schemas.android.com/apk/res/android" >
<translate
android:duration="800"
android:fillAfter="true"
android:fromYDelta="50%p"
android:toYDelta="0%p" />
</set>

thanks for ur response..
i tried ur suggestion 's and i found that using 50%p to then in a 4 inch screen the image view is present at around 3\4of the screen. but when i use 25%p then its around the center. in case of s advance its center and in s3 its relatively center.. i guess it depends on the size of the image.(dimention)

Animations to make things go around the screen (Android)

I'm new to Android developing. I want some animations when clicking on the card and it will move around the screen and stay at its new position forever (its interactive area should change too).
At first the card is located at the center-bottom of the screen (XDelta= 50% YDelta = 70%) then it will move up straight to center of the screen (XDelta =50% and YDelta is 40%). Then it will move to its upper left (10 dp from the left of the screen and 10 dp from the top of the screen) Sorry I can't post images due to my lack of reputation.
And here's my code in res/anim/card1.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >
<translate
android:duration="200"
android:fromXDelta="50%"
android:fromYDelta="70%"
android:toYDelta="40%"
android:toXDelta="50%"
android:fillEnabled="true"/>
<translate
android:duration="100"
android:fillEnabled="true"
android:fromXDelta="50%"
android:fromYDelta="40%"
android:startOffset="200"
android:toXDelta="10"
android:toYDelta="10" />
</set>
And code to get it work when clicking on the card
Animation anim = AnimationUtils.loadAnimation(MainActivity.this,
R.anim.card1);
iv_card.startAnimation(anim);
... but it just don't animate the way I want. Please help me!!!!

Check Out this (http://www.tktutorials.com/2013/07/animation-in-android-using-xml-files.html) this may help your need. Alter the translate.xml file as per your need, which is located in Res->anim->translate.xml
And solution for your posting Image. My suggestion is upload your pic in googleDrive, then change the share setting for the particular pic from private to Public on web and use the url Link to your question.

Android fade out animation using Cosine function

I in my Android Honeycomb application there is a View which has a fade in and fade out animation. Here's most part of the animation code:
<scale
android:fromXScale="1.0"
android:toXScale="1.0"
android:fromYScale="1.0"
android:toYScale="0.0"
android:pivotX="0%"
android:pivotY="0%"
android:duration="500" />
The way it's working right now the animation happens in a linear time but I want to do it according the Cosine function, that is from Cos(0) until Cos(0,5*pi) the fade out case.
Is it possible to do such thing?
Thank you.

You are free to create your own Interpolator. (See the interface description here.) This can then be applied with Animation.setInterpolator(Interpolator). Or, see this discussion for ways of applying custom Interpolators in XML.

If you don't want linear interpolation, you have choice between:
AccelerateDecelerateInterpolator, AccelerateInterpolator,
AnticipateInterpolator, AnticipateOvershootInterpolator,
BounceInterpolator, CycleInterpolator, DecelerateInterpolator,
LinearInterpolator, OvershootInterpolator
http://developer.android.com/reference/android/view/animation/Interpolator.html
So maybe what is the closest to a Cosine is:
AccelerateDecelerateInterpolator
An interpolator where the rate of change starts and ends slowly but
accelerates through the middle.

Rotate button about X-axis in an Android app

I want to rotate a button about X-axis when clicked and then display a different image so it creates an effect that after button click it's flipping and showing a different image which is at its backside.
I'm using following xml for rotation of button:
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:shareInterpolator="false">
<set android:interpolator="#android:anim/decelerate_interpolator">
<rotate
android:fromDegrees="0"
android:toDegrees="-360"
android:pivotX="25%"
android:pivotY="25%"
android:fromXDelta="0"
android:toXDelta="0"
android:fromYDelta="0"
android:toYDelta="0"
android:duration="400" />
</set>
</set>
But it's rotating the button in 2-D plane about the button's center.

I have a flip example here:
http://www.inter-fuser.com/2009/08/android-animations-3d-flip.html

I'm afraid the conventional graphics and animation APIs are 2D. To use that 3rd dimension you'd need to look into OpenGL, which is non-trivial.
You might be able to fake a depth effect by writing a custom animation that uses setPolyToPoly to warp your initial rect into a trapezoid.

It's been a while since this question is posted, but just for the record - there is a way in newer versions of android, and for back compatibility use http://nineoldandroids.com/