PROGRAM 10:
XML CODE:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
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:layout_width="match_parent"
 android:layout_height="match_parent"
 android:background="#FFF8E1"
 tools:context=".MainActivity">
 <com.example.prg10.MyView
 android:id="@+id/myView"
 android:layout_width="match_parent"
 android:layout_height="match_parent"/>
 <Button
 android:id="@+id/btnAnimate"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:text="Start Animation"
 android:layout_centerHorizontal="true"
 android:layout_alignParentBottom="true"
 android:layout_marginBottom="40dp"/>
</RelativeLayout>
JAVA CODE:
package com.example.prg10;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.os.Bundle;
import android.animation.ObjectAnimator;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {
 private MyView myView;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 myView = findViewById(R.id.myView);
 Button btnAnimate = findViewById(R.id.btnAnimate);
 btnAnimate.setOnClickListener(v -> {
 ObjectAnimator animator = ObjectAnimator.ofFloat(myView,
"circleY", 100, 900);
 animator.setDuration(2000);
 animator.setRepeatCount(3);
 animator.setRepeatMode(ObjectAnimator.REVERSE);
 animator.start();
 });
 }
}
MyView.java CODE:
package com.example.prg10;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.View;
public class MyView extends View
{
 private Paint paint;
 private float circleX = 100;
 private float circleY = 300;
 public MyView(Context context, AttributeSet attrs)
 {
 super(context, attrs);
 paint = new Paint();
 paint.setColor(Color.BLUE);
 paint.setStyle(Paint.Style.FILL);
 paint.setAntiAlias(true);
 }
 @Override
 protected void onDraw(Canvas canvas)
 {
 super.onDraw(canvas);
 canvas.drawCircle(circleX, circleY, 80, paint);
 }
 public void setCircleX(float x) {
 this.circleX = x;
 invalidate();
 }
 public void setCircleY(float y) {
 this.circleY = y;
 invalidate();
 }}