Android image scale animation relative to center point?

AndroidApps/ApplicationsMobile Development

This example demonstrate about Android image scale animation relative to center point.

Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.

Step 2 − Add the following code to res/layout/activity_main.xml.

<?xml version = "1.0" encoding = "utf-8"?>
<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">
   <Button
      android:id = "@+id/button"
      android:layout_centerHorizontal = "true"
      android:layout_marginTop = "100dp"
      android:layout_width = "150dp"
      android:text = "Click"
      android:layout_height = "wrap_content"/>
   <ImageView
      android:id = "@+id/imageView"
      android:src = "@mipmap/ic_launcher_round"
      android:layout_width = "match_parent"
      android:layout_height = "match_parent" />
</RelativeLayout>

In the above code, we have taken button to show image scaling animation(Zoom animation).

Step 3 − Add the following code to src/MainActivity.java

package com.example.andy.myapplication;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.ScaleAnimation;
import android.view.animation.TranslateAnimation;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;

public class MainActivity extends AppCompatActivity {
   ImageView view;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      view = findViewById(R.id.imageView);
      view.setVisibility(View.INVISIBLE);
      findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
            ScaleAnimation fade_in = new ScaleAnimation(0f, 1f, 0f, 1f, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
            fade_in.setDuration(1000);
            fade_in.setFillAfter(true);
            view.startAnimation(fade_in);
         }
      });
   }
}

when user click on button, it will show image scaling animation using the below code -

ScaleAnimation fade_in = new ScaleAnimation(0f, 1f, 0f, 1f, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
fade_in.setDuration(1000);
fade_in.setFillAfter(true);
view.startAnimation(fade_in);

Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click Run   icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen −

in the above screen we have used button, when user click on button, it will show an image with zooming effect as shown below -

Click here to download the project code

raja
Published on 31-Jan-2019 06:19:33
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