Animation zoom in android

Implement Zoom In or Zoom Out in Android

Zoom In and Zoom Out animations are used to enlarge and reduce the size of a view in Android applications respectively. These types of animations are often used by developers to provide a dynamic nature to the applications. Users also feel the changes happening in the application by watching these kinds of animations.

XML Attributes of Scale Tag

The characteristics of Zoom In and Zoom Out animations are defined in the XML files by using scale tag.

XML attribute	Description
android:duration	Used to define the duration of the animation in millisecond
android:fromXScale	Used to set initial size of the view in X-axis
android:fromYScale	Used to set initial size of the view in Y-axis
android:pivotX	To define the X coordinate of the point about which the object is being zoom in/out
android:pivotY	To define the Y coordinate of the point about which the object is being zoom in/out
android:toXScale	Used to set final size of the view in X-axis
android:toYScale	Used to set final size of the view in Y-axis

How to Add Zoom In/Out Animation in Android

The following example demonstrates the steps involved in implementing Zoom In and Zoom Out animation to an image file. An image file will be added in the activity using ImageView.

Note: Following steps are performed on Android Studio version 4.0

Step 1: Create new project

1. Click on File, then New => New Project.
2. Select language as Kotlin.
3. Select the minimum SDK as per your need.

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Android Zoom In / Out Animations with Examples

In android, Zoom In and Zoom Out animations are used to change the appearance and behavior of the objects over a particular interval of time. The Zoom In and Zoom Out animations will provide a better look and feel for our applications.

Generally, the animations are useful when we want to notify users about the changes happening in our app, such as new content loaded or new actions available, etc.

To create an animation effect on the objects in our android application, we need to follow below steps.

Create XML File to Define Animation

We need to create an XML file that defines the type of animation to perform in a new folder anim under res directory (res à anim à zoom_in.xml) with the required properties. In case, if anim folder does not exist in res directory, create a new one.

To use Zoom In or Zoom Out animations in our android applications, we need to define new XML files with tag like as shown below.

For Zoom In animation, we need to set android :pivotX= «50%» and android :pivotY= «50%» to perform the zoom from the centre of the element. Also, we need to use fromXScale , fromYScale attributes to define the scaling of an object and we need keep these values lesser than toXScale , toYScale like as shown below.

xml version= «1.0» encoding= «utf-8» ?>
set xmlns: android = «http://schemas.android.com/apk/res/android» >
scale
xmlns: android = «http://schemas.android.com/apk/res/android»
android :duration= «1000»
android :fromXScale= «2»
android :fromYScale= «2»
android :pivotX= «50%»
android :pivotY= «50%»
android :toXScale= «4»
android :toYScale= «4» >
scale >
set >

Zoom Out animation is same as Zoom In animation but fromXScale , fromYScale attribute values must be greater than toXScale , toYScale like as shown below.

xml version= «1.0» encoding= «utf-8» ?>
set xmlns: android = «http://schemas.android.com/apk/res/android» >
scale
android :duration= «2500»
android :fromXScale= «1.0»
android :fromYScale= «1.0»
android :pivotX= «50%»
android :pivotY= «50%»
android :toXScale= «.2»
android :toYScale= «.2»/>
set >

Once we are done with creation of required animation XML files, we need to load those animation files using different properties.

Android Load and Start the Animation

In android, we can perform animations by using AnimationUtils component methods such as loadAnimation(). Following is the code snippet of loading and starting an animation using loadAnimation() and startAnimation() methods.

Animation aniSlide = AnimationUtils.loadAnimation(getApplicationContext(),R.anim. zoom_in );
img .startAnimation(aniSlide);

If you observe above code snippet, we are adding an animation to the image using loadAnimation() method. The second parameter in loadAnimation() method is the name of our animation xml file.

Here we used another method startAnimation() to apply the defined animation to imageview object.

Now we will see how to implement zoom in and zoom out animations for imageview on button click in android applications with examples.

Android Zoom In & Zoom Out Animations Example

Following is the example of implementing a zoom in and zoom out animations to change the image size on button click in android applications.

Create a new android application using android studio and give names as ZoomInOutExample. In case if you are not aware of creating an app in android studio check this article Android Hello World App.

Once we create an application, open activity_main.xml file from \res\layout folder path and write the code like as shown below.

activity_main.xml

xml version= «1.0» encoding= «utf-8» ?>
RelativeLayout xmlns: android = «http://schemas.android.com/apk/res/android»
android :layout_width= «match_parent»
android :layout_height= «match_parent»
android :paddingLeft= «10dp»
android :paddingRight= «10dp» >
ImageView android :id= «@+id/imgvw»
android :layout_width= «wrap_content»
android :layout_height= «250dp»
android:src= «@drawable/bangkok»/>
Button
android:id= «@+id/btnZoomIn»
android:layout_below= «@+id/imgvw»
android:layout_width= «wrap_content»
android:layout_height= «wrap_content»
android:text= «Zoom In» android:layout_marginLeft= «100dp»/>
Button
android:id= «@+id/btnZoomOut»
android:layout_width= «wrap_content»
android:layout_height= «wrap_content»
android:layout_alignBottom= «@+id/btnZoomIn»
android:layout_toRightOf= «@+id/btnZoomIn»
android:text= «Zoom Out»/>
RelativeLayout >

As discussed, we need to create an xml files to define zoom in and zoom out animations in new folder anim under res directory (res à anim à zoom_in.xml, zoom_out.xml) with required properties. In case anim folder not exists in res directory, create a new one.

Following is the example of creating an XML files (zoom_in.xml, zoom_out.zml) under anim folder to define zoom in / out animation properties.

Now open zoom_in.xml file and write the code to set zoom in animation properties like as shown below

zoom_in.xml

xml version= «1.0» encoding= «utf-8» ?>
set xmlns: android = «http://schemas.android.com/apk/res/android» >
scale
xmlns: android = «http://schemas.android.com/apk/res/android»
android :duration= «1000»
android :fromXScale= «2»
android :fromYScale= «2»
android :pivotX= «50%»
android :pivotY= «50%»
android :toXScale= «4»
android :toYScale= «4» >
scale >
set >

Now open zoom_out.xml file and write the code to set zoom out animation properties like as shown below

zoom_out.xml

xml version= «1.0» encoding= «utf-8» ?>
set xmlns: android = «http://schemas.android.com/apk/res/android» >
scale
android :duration= «2500»
android :fromXScale= «1.0»
android :fromYScale= «1.0»
android :pivotX= «50%»
android :pivotY= «50%»
android :toXScale= «.2»
android :toYScale= «.2»/>
set >

Now open your main activity file MainActivity.java from \java\com.tutlane.zoominoutexample path and write the code like as shown below.

MainActivity.java

package com.tutlane.zoominoutexample;
import android.media.Image;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.ImageView;

public class MainActivity extends AppCompatActivity <
private Button btnzIn ;
private Button btnzOut ;
private ImageView img ;
@Override
protected void onCreate(Bundle savedInstanceState) <
super .onCreate(savedInstanceState);
setContentView(R.layout. activity_main );
btnzIn = (Button)findViewById(R.id. btnZoomIn );
btnzOut = (Button)findViewById(R.id. btnZoomOut );
img = (ImageView)findViewById(R.id. imgvw );
btnzIn .setOnClickListener( new View.OnClickListener() <
@Override
public void onClick(View v) <
Animation animZoomIn = AnimationUtils.loadAnimation(getApplicationContext(),R.anim. zoom_in );
img .startAnimation(animZoomIn);
>
>);
btnzOut .setOnClickListener( new View.OnClickListener() <
@Override
public void onClick(View v) <
Animation animZoomOut = AnimationUtils.loadAnimation(getApplicationContext(),R.anim. zoom_out );
img .startAnimation(animZoomOut);
>
>);
>
>

If you observe above code, we are adding an animation to the image using loadAnimation() method and used startAnimation() method to apply the defined animation to imageview object.

Output of Android Zoom In / Out Animations Example

When we run the above program in android studio we will get the result as shown below.

If you observe the above result, whenever we are clicking on Zoom In or Zoom Out buttons, the image size varies based on our functionality.

This is how we can implement zoom in and zoom out animations for imageview in android applications based on our requirements.

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Animation zoom in android

View Animation Effects in Android

January 19, 2017 by Srinivas

Android provides property animation framework using which you can animate properties of any object. In property animation, value of a property is gradually changed from provided start value to end value in specified time duration.

You can find more information about property animation in android animation post.

In this post, I am going to show how to create different animation effects using android property animation framework and TextView as target object.

Color Animation

Animating text color can be done using ObjectAnimator’s ofArgb() method. You need to pass list of colors to be animated through in addition to object and property. In the same way, view’s back ground can be animated. Below code snippet shows how to animate text color and back ground color together using AnimatorSet.

Shadow Animation

Shadow animation can be achieved by animating elevation property of target view.

Slide Down

Slide down animation can be achieved by animating ScaleY from value 0 to 1.

Slide Up

Slide up animation can be achieved by animating ScaleY from value 1 to 0.

Slide In

Slide in animation can be achieved by animating ScaleX from value 1 to 0.

Slide Out

Slide Out animation can be achieved by animating ScaleX from value 0 to 1.

Rotate Animation

Rotate animation can be achieved using RotateAnimation class. RotateAnimation’s constructor takes from degree, to degree, x axis and y axis for rotation of target object. You can specify x axis and y axis type also. Axis type RELATIVE_TO_SELF allows you to specify coordinate values as percentage of width and height of target object, setting the both axis values 0.5 makes target object rotate at center point.To use RotateAnimation, you need to set interpolator and set it to target object by calling startAnimation() method.

Rotate Anti Clockwise

To rotate object anti clockwise, you need to set from degree as 360 and to degree as 0.

Fade In Animation

Fade animation can be achieved by animating alpha property.

Fade Out Animation

Fade out animation can be created by animating alpha property from 1 to 0.

Blink Animation

Using alpha property you can create blink animation by setting the duration to few milliseconds and repeating the animation.

Move Animation

Position of an object can be animated using TranslateAnimation. TranslateAnimation’s constructor takes delta x and delta y values.

Zoom Out Animation

Zoom animation can be created by using scaleAnimation class. scaleAnimation’s constructor takes from and to scale x and scale y values and pivot x and y values. By setting pivot x and pivot y to center of object and changing scalex and scaley from high values to low values, zoom out animation of target object can be achieved.

Zoom In Animation

By setting pivot x and pivot y to center of object and changing scalex and scaley from low values to high values, zoom in animation of target object can be achieved.

Bounce Animation

Animation Complete Code

Animation Activity

Animation Layout

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Android app development tutorials and web app development tutorials with programming examples and code samples.

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Zoom Out Animation in Android

In this android zoom out tutorial, you will learn to implement Zoom out animation in android application using XML and little bit java code. Android view animation is the basic animation in android and also easy to implement in application.

Android animation can be used in many ways. Following example shows you to use animation in android app. View animation can be defined either in XML or java code. In this android zoom out example project, I have used an ImageView and a Button. When you click Start ZoomOut Animation button, the image will start to zoom out.

If you are considering adding an animation to your Android app, you should keep these tips in mind. This way, you will be able to avoid any bugs or errors that might cause you to lose money or users. The first thing that you should do is test out the animation before you enable it. You should try changing the zoom setting as well. After you have done this, you should be able to test it out with a few different users.

Another tip that you should keep in mind is the animation duration. The longer the animation is, the less likely it is to turn off your users. You should also ensure that you use animations that are appropriate for the app. This means that you should not use the animation in areas that are deemed inappropriate. If you use this animation properly, you will be able to maintain the user’s interest and keep them from being frustrated. Once you have figured out how to implement an animation, it is important that you test it out with a few different users before you go live. This will ensure that your users do not get frustrated with the video’s functionality and will instead help improve your overall user experience.

Zoom Out Animation Example: How to Implement Zoom Out Animation in Android

To implement zoom out animation in android application from XML, first we need to create xml animation file in res/anim/ directory and following is the xml content of anim/zoom_out_animation.xml file.

XML Layout File

Java Activity File

Strings.xml File

That’s all. Now, run your android zoom out application and click the Start ZoomOut Animation button then the image will zoom out.

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