Animation is the process of adding a motion effect to any view, image, or text. With the help of an animation, you can add motion or can change the shape of a specific view. Animation in Android is generally used to give your UI a rich look and feel. The animations are basically of three types as follows:
- Property Animation
- View Animation
- Drawable Animation
1. Property Animation
Property Animation is one of the robust frameworks which allows animating almost everything. This is one of the powerful and flexible animations which was introduced in Android 3.0. Property animation can be used to add any animation in the CheckBox, RadioButtons, and widgets other than any view.
2. View Animation
View Animation can be used to add animation to a specific view to perform tweened animation on views. Tweened animation calculates animation information such as size, rotation, start point, and endpoint. These animations are slower and less flexible. An example of View animation can be used if we want to expand a specific layout in that place we can use View Animation. The example of View Animation can be seen in Expandable RecyclerView.
3. Drawable Animation
Drawable Animation is used if you want to animate one image over another. The simple way to understand is to animate drawable is to load the series of drawable one after another to create an animation. A simple example of drawable animation can be seen in many apps Splash screen on apps logo animation.
Important Methods of Animation
|
Methods |
Description |
|---|---|
| startAnimation() | This method will start the animation. |
| clearAnimation() | This method will clear the animation running on a specific view. |
Example
Now we will see the Simple Example to add animations to ImageView. Note that we are going to implement this project using the Java language.
Step 1: Create a New Project
To create a new project in Android Studio please refer to How to Create/Start a New Project in Android Studio. Note that select Java as the programming language.
Step 2: Working with the strings.xml file
Strings.xml can be found from the app > res > values > strings.xml. Below is the snippet for the strings.xml file.
XML
<resources> <string name="app_name">GFG App</string> <string name="blink">BLINK</string> <string name="clockwise">ROTATE</string> <string name="fade">FADE</string> <string name="move">MOVE</string> <string name="slide">SLIDE</string> <string name="zoom">ZOOM</string> <string name="stop_animation">STOP ANIMATION</string> <string name="course_rating">Course Rating</string> <string name="course_name">Course Name</string></resources> |
Step 3: Add google repository in the build.gradle file of the application project if by default it is not there
buildscript {
repositories {
google()
mavenCentral()
}
All Jetpack components are available in the Google Maven repository, include them in the build.gradle file
allprojects {
repositories {
google()
mavenCentral()
}
}
Step 4: Working with the activity_main.xml file
Create ImageView in the activity_main.xml along with buttons that will add animation to the view. Navigate to the app > res > layout > activity_main.xml. Below is the code for the activity_main.xml file.
XML
<?xml version="1.0" encoding="utf-8"?><RelativeLayout android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"> <ImageView android:id="@+id/imageview" android:layout_width="200dp" android:layout_height="200dp" android:layout_centerHorizontal="true" android:layout_marginTop="40dp" android:contentDescription="@string/app_name" android:src="@drawable/gfgimage" /> <LinearLayout android:id="@+id/linear1" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_below="@id/imageview" android:layout_marginTop="30dp" android:orientation="horizontal" android:weightSum="3"> <!--To start the blink animation of the image--> <Button android:id="@+id/BTNblink" style="@style/TextAppearance.AppCompat.Widget.Button" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_margin="10dp" android:layout_weight="1" android:padding="3dp" android:text="@string/blink" android:textColor="@color/white" /> <!--To start the rotate animation of the image--> <Button android:id="@+id/BTNrotate" style="@style/TextAppearance.AppCompat.Widget.Button" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_margin="10dp" android:layout_weight="1" android:padding="3dp" android:text="@string/clockwise" android:textColor="@color/white" /> <!--To start the fading animation of the image--> <Button android:id="@+id/BTNfade" style="@style/TextAppearance.AppCompat.Widget.Button" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_margin="10dp" android:layout_weight="1" android:padding="3dp" android:text="@string/fade" android:textColor="@color/white" /> </LinearLayout> <LinearLayout android:id="@+id/linear2" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_below="@id/linear1" android:layout_marginTop="30dp" android:orientation="horizontal" android:weightSum="3"> <!--To start the move animation of the image--> <Button android:id="@+id/BTNmove" style="@style/TextAppearance.AppCompat.Widget.Button" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_margin="10dp" android:layout_weight="1" android:padding="3dp" android:text="@string/move" android:textColor="@color/white" /> <!--To start the slide animation of the image--> <Button android:id="@+id/BTNslide" style="@style/TextAppearance.AppCompat.Widget.Button" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_margin="10dp" android:layout_weight="1" android:padding="3dp" android:text="@string/slide" android:textColor="@color/white" /> <!--To start the zoom animation of the image--> <Button android:id="@+id/BTNzoom" style="@style/TextAppearance.AppCompat.Widget.Button" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_margin="10dp" android:layout_weight="1" android:padding="3dp" android:text="@string/zoom" android:textColor="@color/white" /> </LinearLayout> <!--To stop the animation of the image--> <Button android:id="@+id/BTNstop" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_below="@id/linear2" android:layout_marginLeft="30dp" android:layout_marginTop="30dp" android:layout_marginRight="30dp" android:text="@string/stop_animation" /></RelativeLayout> |
Step 5: Create 6 different types of animation for ImageView
To create new animations we have to create a new directory for storing all our animations. Navigate to the app > res > Right-Click on res >> New >> Directory >> Name your directory as “anim”. Inside this directory, we will create our animations. For creating a new anim right click on the anim directory >> Animation Resource file and give the name to your file. Below is the code snippet for 6 different animations.
1) Blink Animation
XML
<?xml version="1.0" encoding="utf-8"?> <alpha android:fromAlpha="0.0" android:toAlpha="1.0" android:interpolator="@android:anim/accelerate_interpolator" android:duration="500" android:repeatMode="reverse" android:repeatCount="infinite"/></set> |
2) Fade Animation
XML
<?xml version="1.0" encoding="utf-8"?> android:interpolator="@android:anim/accelerate_interpolator"> <!-- duration is the time for which animation will work--> <alpha android:duration="1000" android:fromAlpha="0" android:toAlpha="1" /> <alpha android:duration="1000" android:fromAlpha="1" android:startOffset="2000" android:toAlpha="0" /></set> |
3) Move Animation
XML
<?xml version="1.0" encoding="utf-8"?><set android:interpolator="@android:anim/linear_interpolator" android:fillAfter="true"> <translate android:fromXDelta="0%p" android:toXDelta="75%p" android:duration="700" /></set> |
4) Rotate Animation
XML
<?xml version="1.0" encoding="utf-8"?><set <rotate android:duration="6000" android:fromDegrees="0" android:pivotX="50%" android:pivotY="50%" android:toDegrees="360" /> <rotate android:duration="6000" android:fromDegrees="360" android:pivotX="50%" android:pivotY="50%" android:startOffset="5000" android:toDegrees="0" /></set> |
5) Slide Animation
XML
<?xml version="1.0" encoding="utf-8"?> android:fillAfter="true" > <scale android:duration="500" android:fromXScale="1.0" android:fromYScale="1.0" android:interpolator="@android:anim/linear_interpolator" android:toXScale="1.0" android:toYScale="0.0" /></set> |
6) Zoom Animation
XML
<?xml version="1.0" encoding="utf-8"?> android:fillAfter="true" > <scale android:interpolator="@android:anim/linear_interpolator" android:duration = "1000" android:fromXScal = "1" android:fromYScale = "1" android:pivotX = "50%" android:pivotY = "50%" android:toXScale = "2" android:toYScale = "2"/></set> |
Step 6: Working with the MainActivity.java file
Add animation to the ImageView by clicking a specific Button. Navigate to the app > java > your apps package name >> MainActivity.java.
Java
import androidx.appcompat.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 { ImageView imageView; Button blinkBTN, rotateBTN, fadeBTN, moveBTN, slideBTN, zoomBTN, stopBTN; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); imageView = findViewById(R.id.imageview); blinkBTN = findViewById(R.id.BTNblink); rotateBTN = findViewById(R.id.BTNrotate); fadeBTN = findViewById(R.id.BTNfade); moveBTN = findViewById(R.id.BTNmove); slideBTN = findViewById(R.id.BTNslide); zoomBTN = findViewById(R.id.BTNzoom); stopBTN = findViewById(R.id.BTNstop); blinkBTN.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // To add blink animation Animation animation = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.blink_animation); imageView.startAnimation(animation); } }); rotateBTN.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // To add rotate animation Animation animation = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.rotate_animation); imageView.startAnimation(animation); } }); fadeBTN.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // To add fade animation Animation animation = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.fade_animation); imageView.startAnimation(animation); } }); moveBTN.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // To add move animation Animation animation = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.move_animation); imageView.startAnimation(animation); } }); slideBTN.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // To add slide animation Animation animation = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.slide_animation); imageView.startAnimation(animation); } }); zoomBTN.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // To add zoom animation Animation animation = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.zoom_animation); imageView.startAnimation(animation); } }); stopBTN.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // To stop the animation going on imageview imageView.clearAnimation(); } }); }} |
Note: Drawables and strings can be found in the drawable folder and strings.xml file. Drawables can be found from the app > res > drawable.
Output:
