android - How to move and fade out any View with Animation - Stack Overflow

 

android objectanimator fade out

3D Hologram Video Projector (3) 3D smartphone (1) accessory (1) ACTION_GET_CONTENT (5) ACTION_OPEN_DOCUMENT (13) ACTION_OPEN_DOCUMENT_TREE (1) ActionBar (1) ActionBarCompat (7) AdMob SDK (1) AlarmManager (2) AlertDialog (1) ohwander.tkr (2) Alphabet (1) AMD (1) andproud (1) Android (Go Edition) (1) Android (5) Android (9) Android Author: Erik. Oct 04,  · Tutorial about android animations using xml. In this lot of useful animations are exaplained with example code such as fade in, fade out, rotate, scale, move, slide down, slide up, blink, sequential and together animations. The property animation system is a robust framework that allows you to animate almost anything. You can define an animation to change any object property over time, regardless of .


Android-er: Animate Fade In/Fade Out by changing Alpha


The property animation system is a robust framework that allows you to animate almost anything. You can define an animation to change any object property over time, regardless of whether it draws to the screen or not. A property animation changes a property's a field in an object value over a specified length of time.

To animate something, you specify the object property that you want to animate, such as an object's position on the screen, how long you want to animate it for, and what values you want to animate between.

To see a full example of property animation, see the ChangeColor class in the android-CustomTransition sample on GitHub. First, let's go over how an animation works with a simple example.

Figure 1 depicts a hypothetical object that is animated with its x property, which represents its horizontal location on a screen. The duration of the animation is set to 40 ms and the distance to travel is 40 pixels. Every 10 ms, which is the default frame refresh rate, the object moves horizontally by 10 pixels. At the end of 40ms, the animation stops, and the object ends at horizontal position This is an example of an animation with linear interpolation, meaning the object moves at a constant speed.

You can also specify animations to have a non-linear interpolation. Figure 2 illustrates a hypothetical object that accelerates at the beginning of the animation, and decelerates at the end of the animation. The object android objectanimator fade out moves 40 pixels in 40 ms, but non-linearly. In the beginning, this animation accelerates up to the halfway point then decelerates from the halfway point until the end of the animation.

As Figure 2 shows, the distance traveled at the beginning and end of the animation is less than android objectanimator fade out the middle. Let's take a detailed look at how the important components of the property animation system would calculate animations like the ones illustrated above. Figure 3 depicts how the main classes work with android objectanimator fade out another. The ValueAnimator object keeps track of your animation's timing, such as how long the animation has been running, and the current value of the property that it is animating.

The ValueAnimator encapsulates a TimeInterpolatorwhich defines animation interpolation, and a TypeEvaluatorwhich defines how to calculate values for the property being animated. To start an animation, create a ValueAnimator and give it the starting and ending values for the property that you want to animate, along with the duration of the animation. When you call start the animation begins. During the whole animation, the ValueAnimator calculates an elapsed fraction between 0 and 1, based on the duration of the animation and how much time has elapsed, android objectanimator fade out.

When the ValueAnimator is done calculating an elapsed fraction, it calls the TimeInterpolator that is currently set, to calculate an interpolated fraction.

An interpolated fraction maps the elapsed fraction to a new fraction that takes into account the time interpolation that is set. For example, in Figure 2, because the animation slowly accelerates, the interpolated fraction, about. In Figure 1, the interpolated fraction is always the same as the elapsed fraction. When the interpolated fraction is calculated, ValueAnimator calls the appropriate TypeEvaluatorto calculate the value of the property that you are animating, android objectanimator fade out, based on the interpolated fraction, android objectanimator fade out, the starting value, android objectanimator fade out the ending value of the animation.

For example, in Figure 2, the android objectanimator fade out fraction was. Android objectanimator fade out view animation system provides the capability to only animate View objects, so if you wanted to animate non- View objects, you have to implement your own code to do so.

The view animation system is also constrained in the fact that it only exposes a few aspects of a View object to animate, such as the scaling and rotation of a View but not the background color, for instance.

Another disadvantage of the view animation system is that it only modified where the View was drawn, and not the actual View itself. For instance, if you animated a button to move across the screen, the button draws correctly, but the actual location where you can click the button does not change, so you have to implement your own logic to handle this. With the property animation system, these constraints are completely removed, and you can animate any property of any object Views and non-Views and the object itself is actually modified.

The property animation system is also more robust in the way it carries out animation. At a high level, you assign animators to the properties that you want to animate, such as color, position, or size and can define aspects of the animation such as interpolation and synchronization of multiple animators.

The view animation system, however, takes less time to setup and requires less code to write. If view animation accomplishes everything that you need to do, or if your existing code already works the way you want, there is no need to use the property animation system. It also might make sense to use both animation systems for different situations if the use case arises. You can find most of the property animation system's APIs in android.

Because the view animation system already defines many interpolators in android. The following tables describe the main components of the property animation system.

The Animator class provides the basic structure for creating animations. You normally do not use this class directly as it only provides minimal functionality that must be extended to fully support animating values. The following subclasses extend Animator :.

Evaluators tell the property animation system how to calculate values for a given property. They take the timing data that is provided by an Animator class, the animation's start and end value, and calculate the animated values of the property based on this data. The property animation system provides the following evaluators:. A time interpolator defines how specific values in an animation are calculated as a function of time. For example, you can specify animations to happen linearly across the whole animation, meaning the animation moves evenly the entire time, android objectanimator fade out, or you can specify animations to use non-linear time, for example, accelerating at the beginning and decelerating at the end android objectanimator fade out the animation.

Table 3 describes the interpolators that are contained in android. If none of the provided interpolators suits your needs, implement the TimeInterpolator interface and create your own. See Using interpolators for more information on how to write a custom interpolator. The ValueAnimator class lets you animate values of some type for the duration of an animation by specifying a set of intfloator color values to animate through.

For example:. In this code, android objectanimator fade out, the ValueAnimator starts calculating the values of the animation, between 0 andfor a duration of ms, when the start method runs. In this code, the ValueAnimator starts calculating the values of the animation, between startPropertyValue and endPropertyValue using the logic supplied by MyTypeEvaluator for a duration of ms, when the start method runs.

You can use the values of the animation by adding an AnimatorUpdateListener to the ValueAnimator object, as shown in the following code:. In the onAnimationUpdate method you can access the updated animation value and use it in a property of one of your views.

For more information on listeners, see the section about Animation listeners. The ObjectAnimator is a subclass of the ValueAnimator discussed in the previous section and combines the timing engine and value computation of ValueAnimator with the ability to animate a named property of a target object. This makes animating any object much easier, as you no longer need to implement the ValueAnimator.

AnimatorUpdateListenerbecause the animated property updates android objectanimator fade out. Instantiating an ObjectAnimator is similar to a ValueAnimatorbut you also specify the object and the name of that object's property as a String along with the values to animate between:.

To have the ObjectAnimator update properties correctly, you must do the following:. In many cases, you want to play an animation that depends on when another animation android objectanimator fade out or finishes. The Android system lets you bundle animations together into an AnimatorSetso that you can specify whether to start animations simultaneously, sequentially, or after a android objectanimator fade out delay. You can also nest AnimatorSet objects within each other.

The following code snippet plays the following Animator objects in the following manner:. You can listen for important events during an animation's duration with the listeners described below. Listen to this event to use the calculated values generated by ValueAnimator during an animation.

To use the value, query the ValueAnimator object passed into the event to get the current animated value with the getAnimatedValue method. Implementing this listener is required if you use ValueAnimator. Depending on what property or object you are animating, you might need to call invalidate on a View to force that area of the screen to redraw itself with the new animated values. For example, animating the color property of a Drawable object only cause updates to the screen when that object redraws itself, android objectanimator fade out.

All of the property setters on View, such as setAlpha and setTranslationX invalidate the View properly, so you do not need to invalidate the View when calling these methods with new values. You can extend the AnimatorListenerAdapter class instead of implementing the Animator, android objectanimator fade out. AnimatorListener interface, if you do not want to implement all of the methods of the Animator.

AnimatorListener interface, android objectanimator fade out. The AnimatorListenerAdapter class provides empty implementations of the methods that you can choose to override. For example, the following code snippet creates an AnimatorListenerAdapter for just the onAnimationEnd callback:.

The property animation system provides the capability to animate changes to ViewGroup objects as well as provide an easy way to animate View objects themselves. You can animate layout changes within a ViewGroup with the LayoutTransition class.

The remaining Views in the ViewGroup can also animate into their new positions when you add or remove Views. You can define the following animations in a LayoutTransition object by calling setAnimator and passing in an Animator object with one of the following LayoutTransition constants:. You can define your own custom animations for these four types of events to customize the look of your layout transitions or just tell the animation system to use the default animations.

The LayoutAnimations sample in API Demos android objectanimator fade out you how to define animations for layout transitions and then set the animations on the View objects that you want to animate. The only thing that you android objectanimator fade out to do is to set the android:animateLayoutchanges attribute to true for the ViewGroup, android objectanimator fade out. Setting this attribute to true automatically animates Views that are added or removed from the ViewGroup as well as the remaining Views in the ViewGroup.

The StateListAnimator class lets you define animators that run when the state of a view changes. This object behaves as a android objectanimator fade out for an Animator object, android objectanimator fade out, calling that animation whenever the specified view state such as "pressed" or "focused" changes. For example, the following file creates a state list animator that changes the x and y scale of the view when it's pressed:.

To attach the state list animator to a view, add the android:stateListAnimator attribute as follows:. Or to instead assign a state list animator to a view in your code, use the AnimatorInflater. Or instead of animating properties of the view, you can play a drawable animation between state changes, using AnimatedStateListDrawable.

Some of the system widgets in Android 5. If you want to animate a type that is unknown to the Android system, you can create your own evaluator by implementing the TypeEvaluator interface. The types that are known by the Android system are intfloator a color, which are android objectanimator fade out by the IntEvaluatorFloatEvaluatorand ArgbEvaluator type evaluators.

There is only one method to implement in the TypeEvaluator interface, the evaluate method.

 

Android Working with XML Animations

 

android objectanimator fade out

 

With this code, the view starts from the left side of the screen and moves to almost the end of the screen, but I also want to fade-out the view and hide/destroy it in the end. I tried to search anything related to this, but couldn't find any. Any help is appreciated. 3D Hologram Video Projector (3) 3D smartphone (1) accessory (1) ACTION_GET_CONTENT (5) ACTION_OPEN_DOCUMENT (13) ACTION_OPEN_DOCUMENT_TREE (1) ActionBar (1) ActionBarCompat (7) AdMob SDK (1) AlarmManager (2) AlertDialog (1) ohwander.tkr (2) Alphabet (1) AMD (1) andproud (1) Android (Go Edition) (1) Android (5) Android (9) Android Author: Erik. android documentation: Fade in/out animation. Example. In order to get a view to slowly fade in or out of view, use an ohwander.tk seen in the code below, set a duration ohwander.tkation(millis) where the millis parameter is the duration (in milliseconds) of the animation. In the below code, the views will fade in / out over milliseconds, or 1/2 second.