What is animation on Android?

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<alpha android:fromAlpha="0.0"
android:toAlpha="1.0"
android:interpolator="@android:anim/accelerate_interpolator"
android:duration="200"
android:repeatMode="reverse"
android:repeatCount="infinite"/>
</set>

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
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="1000"
android:toAlpha="0" />

</set>

<?xml version="1.0" encoding="utf-8"?>
<set
xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:anim/linear_interpolator"
android:fillAfter="true">

<translate
android:fromXDelta="0%p"
android:toXDelta="75%p"
android:duration="700" />
</set>

<?xml version="1.0" encoding="utf-8"?>
<set
xmlns:android="http://schemas.android.com/apk/res/android">
<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>

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
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>

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/main"
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="28dp"
android:contentDescription="@string/app_name"
android:src="@drawable/yourgifpath"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.497"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />

// Button click to perform the blink animation
<Button
android:id="@+id/BTNblink"
style="@style/TextAppearance.AppCompat.Widget.Button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:layout_weight="1"
android:padding="3dp"
android:text="blink"
android:textColor="@color/white"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/BTNslide" />

// Button click to perform the stop animation
<Button
android:id="@+id/BTNstop"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="28dp"
android:text="stop_animation"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/BTNzoom" />

// Button click to perform the move animation
<Button
android:id="@+id/BTNmove"
style="@style/TextAppearance.AppCompat.Widget.Button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:layout_marginTop="24dp"
android:layout_weight="1"
android:padding="3dp"
android:text="move"
android:textColor="@color/white"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/BTNfade" />

// Button click to perform the move animation
<Button
android:id="@+id/BTNzoom"
style="@style/TextAppearance.AppCompat.Widget.Button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:layout_weight="1"
android:padding="3dp"
android:text="zoom"
android:textColor="@color/white"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/BTNrotate" />

// Button click to perform the slide animation
<Button
android:id="@+id/BTNslide"
style="@style/TextAppearance.AppCompat.Widget.Button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:layout_marginTop="8dp"
android:layout_weight="1"
android:padding="3dp"
android:text="slide"
android:textColor="@color/white"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/BTNmove" />

// Button click to perform the fade animation
<Button
android:id="@+id/BTNfade"
style="@style/TextAppearance.AppCompat.Widget.Button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:layout_marginTop="28dp"
android:layout_weight="1"
android:padding="3dp"
android:text="fade"
android:textColor="@color/white"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/imageview" />

// Button click to perform the rotate animation
<Button
android:id="@+id/BTNrotate"
style="@style/TextAppearance.AppCompat.Widget.Button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:layout_weight="1"
android:padding="3dp"
android:text="clockwise"
android:textColor="@color/white"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/BTNblink" />

</androidx.constraintlayout.widget.ConstraintLayout>

public class MainActivity extends AppCompatActivity {

ImageView imageView;
Button blink, rotate, fade, move, slide, zoom, stop;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
imageView = findViewById(R.id.imageview);
blink = findViewById(R.id.BTNblink);
rotate = findViewById(R.id.BTNrotate);
fade = findViewById(R.id.BTNfade);
move = findViewById(R.id.BTNmove);
slide = findViewById(R.id.BTNslide);
zoom= findViewById(R.id.BTNzoom);
stop = findViewById(R.id.BTNstop);

blink.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Animation animation = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.blink_animation);
imageView.startAnimation(animation);
}
});

rotate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Animation animation = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.rotate_animation);
imageView.startAnimation(animation);
}
});
fade.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Animation animation = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.fade_animation);
imageView.startAnimation(animation);
}
});
move.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Animation animation = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.move_animation);
imageView.startAnimation(animation);
}
});
slide.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Animation animation = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.slide_animation);
imageView.startAnimation(animation);
}
});
zoom.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Animation animation = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.zoom_animation);
imageView.startAnimation(animation);
}
});
stop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
imageView.clearAnimation();
}
});
}
}