RotateAnimation and scaling transformation.

To understand android.view.animation.RotateAnimation and scaling transformation.

Create the sample application that Rotate a green rectangle shape and after that double the size of that object and then shrink back to our starting size.

XML Code :

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent" >

<ImageView

       android:id="@+id/imageView1"

       android:layout_width="wrap_content"

       android:layout_height="wrap_content"

       android:layout_alignParentTop="true"

       android:layout_centerHorizontal="true"

       android:layout_marginTop="194dp"

       />

</RelativeLayout>

 spin.xml :

<?xml version="1.0" encoding="utf-8"?>

<set xmlns:android

= "http://schemas.android.com/apk/res/android"

android:shareInterpolator="false">

<rotate

     android:fromDegrees="0"

  android:toDegrees="360"

  android:pivotX="50%"

  android:pivotY="50%"

  android:duration="5000" />

 

<scale

  android:pivotX="50%"

  android:pivotY="50%"

  android:fromXScale="1.0"

  android:fromYScale="1.0"

  android:toXScale="2.0"

  android:toYScale="2.0"

  android:duration="2500" />

<scale

  android:startOffset="2500"

  android:duration="2500"

  android:pivotX="50%"

  android:pivotY="50%"

  android:fromXScale="1.0"

  android:fromYScale="1.0"

  android:toXScale="0.5"

  android:toYScale="0.5" />

</set>

Ø  JAVA Code :

package com.example.pra7;

import android.os.Bundle;

import android.app.Activity;

import android.graphics.Color;

import android.graphics.drawable.ShapeDrawable;

import android.graphics.drawable.shapes.RectShape;

import android.view.Menu;

import android.view.MenuItem;

import android.view.animation.Animation;

import android.view.animation.AnimationUtils;

import android.view.animation.RotateAnimation;

import android.widget.ImageView;

import android.support.v4.app.NavUtils;

public class Pra7 extends Activity {

 

  ImageView iv;

@Override

public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_pra7);

   

    iv = (ImageView)findViewById(R.id.imageView1);

   

    ShapeDrawable rect = new ShapeDrawable(new RectShape());

    rect.setIntrinsicHeight(100);

    rect.setIntrinsicWidth(200);

    rect.getPaint().setColor(Color.GREEN);

    iv.setImageDrawable(rect);

    Animation an = AnimationUtils.loadAnimation(this,R.anim.spin);

    iv.startAnimation(an);

}

}

• OUTPUT :

s