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Android image scale animation relative to center point?
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
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