Skip to content
Related Articles

Related Articles

Improve Article
Save Article
Like Article

Flip Card Animation in Android

  • Last Updated : 25 Aug, 2021

In this article, we are going to see how to build a Flip Card Animation app in Android Studio. Animation makes our app more attractive, convincing, and user-friendly. A sample GIF is given below to get an idea about what we are going to do in this article. Please note that we will be using Kotlin as the programming language. 

Flip Card Animation in Android Sample GIF

Want a more fast-paced & competitive environment to learn the fundamentals of Android?
Click here to head to a guide uniquely curated by our experts with the aim to make you industry ready in no time!

Step by Step Implementation

Step 1: Create a New Project

To create a new project in Android Studio please refer to How to Create/Start a New Project in Android Studio. Note that select Java as the programming language.



Step 2: Working with the activity_main.xml file

Go to res > layout > activity_main.xml file and add the below code to that file. Below is the code for the activity_main.xml file. Comments are added inside the code to understand the code in more detail.

XML




<?xml version="1.0" encoding="utf-8"?>
<!--We are going to use Constraintlayout-->
<androidx.constraintlayout.widget.ConstraintLayout 
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">
  
      <!--Add a textView for front part of the card-->
    <TextView
        android:id="@+id/card_back"
        android:layout_width="300dp"
        android:layout_height="300dp"
        android:textAlignment="center"
        android:gravity="center"
        android:text="Back Card"
        android:textSize="22sp"
        android:background="#BF3030"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
    
    <!--Add a textview for back part of the card-->
    <TextView
        android:id="@+id/card_front"
        android:layout_width="300dp"
        android:layout_height="300dp"
        android:textAlignment="center"
        android:gravity="center"
        android:text="Front Card"
        android:textSize="22sp"
        android:background="#326314"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
  
    <!--Add a Button that will apply flip on the card-->
    <Button
        android:id="@+id/flip_btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Flip Me"
        tools:ignore="MissingConstraints"
        android:layout_marginTop="380dp"
        tools:layout_editor_absoluteX="142dp"
        tools:layout_editor_absoluteY="559dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"/>
  
</androidx.constraintlayout.widget.ConstraintLayout>

Step 3: Create a New Directory

Create a new directory with the name animator where we will deal with the card’s front and back animation part. To create a new directory please follow the images given below.

Step 4: Create a New Animator Resource File

Create a New Animator Resource File with the name front_animator.xml that will handle the flip card’s front animation. To create a new Animator Resource File follow the images given below.



Step 5: Working with the front_animator.xml file

Navigate to res > animator > front_animator.xml and add the below code to that file. Here we will be using objectAnimator tag for animation of the front part of the flipping card. Below is the code for the front_animator.xml file. 

XML




<?xml version="1.0" encoding="utf-8"?>
    <objectAnimator
        android:valueFrom="0"
        android:valueTo="180"
        android:propertyName="rotationY"
        android:duration="1000"
        />
    <objectAnimator
        android:valueFrom="1.0"
        android:valueTo="0.0"
        android:propertyName="alpha"
        android:startOffset="500"
        android:duration="1"
        />
</set>

Step 6: Again Create a New Animator Resource File

Again Create a New Animator Resource File with the name back_animator.xml that will be handling animation of the back part of the flip card.  To create a new Animator Resource File follow the same images as shown earlier for creating the front_animator.xml file. 

Step 7: Working with the back_animator.xml file

Navigate to res > animator > back_animator.xml and add the below code to that file. Here we will be using the objectAnimator tag for animation of the front part of the flipping card. Below is the code for the back_animator.xml file. 

XML




<?xml version="1.0" encoding="utf-8"?>
    <objectAnimator
        android:valueFrom="1.0"
        android:valueTo="0.0"
        android:propertyName="alpha"
        android:duration="0"
        />
    <objectAnimator
        android:valueFrom="180"
        android:valueTo="0"
        android:propertyName="rotationY"
        android:repeatMode="reverse"
        android:duration="1000"
        />
  
    <objectAnimator
        android:valueFrom="0.0"
        android:valueTo="1.0"
        android:propertyName="alpha"
        android:startOffset="500"
        android:duration="0"
        />
  
</set>

Step 8: Working with the MainActivity.kt file

Go to MainActivity.kt file and add the code below to that file. Below is the code for MainActivity.kt file. Here we will see how to operate the front and back animation part of the flip card. Comments are added inside the code to understand the code in more detail.

Kotlin




package com.example.flippingcard
  
import android.animation.AnimatorInflater
import android.animation.AnimatorSet
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.Button
import android.widget.TextView
  
class MainActivity : AppCompatActivity() {
  
    lateinit var front_anim:AnimatorSet
    lateinit var back_anim: AnimatorSet
    var isFront =true
  
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
  
        // Now Create Animator Object
        // For this we add animator folder inside res
        // Now we will add the animator to our card
        // we now need to modify the camera scale
        var scale = applicationContext.resources.displayMetrics.density
  
        val front = findViewById<TextView>(R.id.card_front) as TextView
        val back =findViewById<TextView>(R.id.card_back) as TextView
        val flip = findViewById<Button>(R.id.flip_btn) as Button
  
        front.cameraDistance = 8000 * scale
        back.cameraDistance = 8000 * scale
  
  
        // Now we will set the front animation
        front_animation = AnimatorInflater.loadAnimator(applicationContext, R.animator.front_animator) as AnimatorSet
        back_animation = AnimatorInflater.loadAnimator(applicationContext, R.animator.back_animator) as AnimatorSet
  
        // Now we will set the event listener
        flip.setOnClickListener{
            if(isFront)
            {
                front_animation.setTarget(front);
                back_animation.setTarget(back);
                front_animation.start()
                back_animation.start()
                isFront = false
  
            }
            else
            {
                front_animation.setTarget(back)
                back_animation.setTarget(front)
                back_animation.start()
                front_animation.start()
                isFront =true
  
            }
        }
    }
}

Output:

You can get the source code of the project from this link: Click Here




My Personal Notes arrow_drop_up
Recommended Articles
Page :