ViewFlipper Example–a simple FlashCard

UPDATE: Improved with Fling gesture (Sept 2012)

UPDATE: ViewFlipper with Flip-In and Flip-Out Animation (August 2012)

This tutorial is to demonstrate the ViewFlipper layout that is almost similar to CardLayout (in Java). The app will produce a simple Flash card that provide several screens with different picture for each card. Flip-in and Flip-out animation provided.

Added in Sept 2012 – an improvement to support Fling gesture – enjoy… The amendment is only on the coding part.

Some how the layout design (main.xml) is quite long. Later I’ll produce separated screen by including several XML layout from outside files.

Screenshots;

/layout/main.xml;

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

<LinearLayout android:id="@+id/LinearLayout01"
    android:layout_width="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_height="fill_parent" 
    android:background="@drawable/smalldroid">
    <!-- admob here -->
    <TableRow
        android:id="@+id/tableRow2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
        <com.google.ads.AdView
            xmlns:ads="http://schemas.android.com/apk/lib/com.google.ads"
            android:id="@+id/ad"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            ads:adSize="SMART_BANNER"
            ads:adUnitId="738a44d913034b9f"
            />    
    </TableRow>

<!-- header -->
<LinearLayout android:id="@+id/LinearLayout03"
android:layout_width="wrap_content" android:layout_height="wrap_content">
    <TextView android:id="@+id/tvwelcome" android:layout_height="wrap_content" 
    android:text="Kad Tunjuk" android:layout_gravity="center" 
    android:layout_width="match_parent"></TextView>
</LinearLayout>

<!-- content -->
<LinearLayout android:id="@+id/LinearLayout02"
    android:baselineAligned="false" android:orientation="horizontal" 
    android:layout_width="match_parent" android:layout_height="wrap_content">

<ViewFlipper android:id="@+id/ViewFlipper01"
android:layout_height="wrap_content" android:layout_width="wrap_content" >
    <!-- adding views to ViewFlipper -->
    
    <!-- View 1- Home/ketetapan - card1 -->
    <TableLayout 
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >
    <TableRow>
        <TextView android:text="HOME" 
            android:textColor="#ffffff"
            android:layout_width="fill_parent" 
            android:layout_height="wrap_content" />
    </TableRow>
    <TableRow android:layout_width="match_parent">
        <ImageView android:layout_width="wrap_content" 
            android:id="@+id/imageView1" android:layout_height="wrap_content" 
            android:src="@drawable/icon"></ImageView>
    </TableRow>
    <TableRow>
        <TextView android:text="FLASHCARD ringkas" 
            android:layout_width="fill_parent" 
            android:layout_height="wrap_content" />
    </TableRow>
    </TableLayout>
    
    <!-- View 2 - A - card2-->
    <TableLayout 
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >
    <TableRow>
        <TextView android:text="HURUF A" 
            android:textColor="#ffffff"
            android:layout_width="fill_parent" 
            android:layout_height="wrap_content" />
    </TableRow>
    <TableRow>
        <ImageView android:layout_width="wrap_content" 
            android:id="@+id/imageView1" android:layout_height="wrap_content" 
            android:src="@drawable/arnab"></ImageView>
    </TableRow>
    <TableRow>
        <TextView android:text="ARNAB" 
            android:layout_width="fill_parent" 
            android:layout_height="wrap_content" />
    </TableRow>
    </TableLayout>
    
    <!-- View 3 - K - card3-->
    <TableLayout 
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >
    <TableRow>
        <TextView android:text="HURUF K" 
            android:textColor="#ffffff"
            android:layout_width="fill_parent" 
            android:layout_height="wrap_content" />
    </TableRow>
    <TableRow>
        <ImageView android:layout_width="wrap_content" 
            android:id="@+id/imageView1" android:layout_height="wrap_content" 
            android:src="@drawable/kereta"></ImageView>
    </TableRow>
    <TableRow>
        <TextView android:text="KERETA LUMBA" 
            android:layout_width="fill_parent" 
            android:layout_height="wrap_content" />
    </TableRow>
    </TableLayout>
    
</ViewFlipper>

</LinearLayout>

<!-- footer -->
<LinearLayout android:id="@+id/LinearLayout03"
    android:layout_height="wrap_content" android:layout_width="wrap_content" 
    android:orientation="horizontal" android:layout_gravity="center">
    <Button android:id="@+id/Button02" android:layout_height="wrap_content" 
        android:text="&lt;Previous" android:layout_width="wrap_content" 
        android:layout_gravity="center"></Button>
    <Button android:id="@+id/ButtonHome" android:text="   Home   " 
        android:layout_height="match_parent" android:layout_width="wrap_content" 
        android:layout_gravity="center"></Button>
    <Button android:id="@+id/Button01" android:text="    Next&gt;" 
        android:layout_height="match_parent" android:layout_width="wrap_content" 
        android:layout_gravity="center"></Button>
</LinearLayout>

</LinearLayout>

Notice that each card is represented as a TableLayout in the ViewFlipper (ID=ViewFlipper01). inside the TableLayout there are one ImageView and two TextViews. The three buttons (Previous, Home and Next) are situated in another LinearLayout marked as footer.

There are additionals XML file you need to create. These files are needed as the animation setting. Start by creating a new folder in res, named anim – /res/anim

/res/anim/flipinnext.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
   android:interpolator="@android:anim/decelerate_interpolator">
<translate
   android:fromXDelta="-100%"
   android:toXDelta="0%"
   android:duration="500" />
</set>

/res/anim/flipoutnext.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
   android:interpolator="@android:anim/decelerate_interpolator">
<translate
   android:fromXDelta="0%"
   android:toXDelta="100%"
   android:duration="500" />
</set>

/res/anim/flipinprevious.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
   android:interpolator="@android:anim/decelerate_interpolator">
<translate
   android:fromXDelta="100%"
   android:toXDelta="0%"
   android:duration="500" />
</set>

/res/anim/flipoutprevious.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
   android:interpolator="@android:anim/decelerate_interpolator">
<translate
   android:fromXDelta="0%"
   android:toXDelta="-100%"
   android:duration="500" />
</set>

 

Java Sourcecode; the project name is Flashcard2…

 

package net.kerul.Flashcard2;

//No animation on card transition

import android.app.Activity;

import android.os.Bundle;

import android.view.GestureDetector.OnGestureListener;

import android.view.GestureDetector;

import android.view.MotionEvent;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.animation.Animation;

import android.view.animation.AnimationUtils;

import android.widget.Button;

import android.widget.Toast;

import android.widget.ViewFlipper;

import com.google.ads.AdRequest;

import com.google.ads.AdView;

public class Flashcard2Activity extends Activity implements OnClickListener, OnGestureListener {

    protected GestureDetector gestureScanner;

    private static final int SWIPE_MIN_DISTANCE = 120;

    private static final int SWIPE_MAX_OFF_PATH = 250;

    private static final int SWIPE_THRESHOLD_VELOCITY = 200;

    private Button next,previous;

    private AdView adView;

    //private ViewFlipper vf;

    //declaration for animation items

//    private ViewFlipper vf=(ViewFlipper)findViewById(R.id.ViewFlipper01);

//    private Animation animFlipInNext = AnimationUtils.loadAnimation(this, R.anim.flipinnext);

//    private Animation animFlipOutNext = AnimationUtils.loadAnimation(this, R.anim.flipoutnext);

//    private Animation animFlipInPrevious = AnimationUtils.loadAnimation(this, R.anim.flipinprevious);

//    private Animation animFlipOutPrevious = AnimationUtils.loadAnimation(this, R.anim.flipoutprevious);

    private ViewFlipper vf;

    private Animation animFlipInNext,animFlipOutNext, animFlipInPrevious, animFlipOutPrevious;

    /** Called when the activity is first created. */

    @SuppressWarnings("deprecation")

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        gestureScanner = new GestureDetector(this);

        //vf for viewflipper

        vf=(ViewFlipper)findViewById(R.id.ViewFlipper01);

        animFlipInNext = AnimationUtils.loadAnimation(this, R.anim.flipinnext);

        animFlipOutNext = AnimationUtils.loadAnimation(this, R.anim.flipoutnext);

        animFlipInPrevious = AnimationUtils.loadAnimation(this, R.anim.flipinprevious);

        animFlipOutPrevious = AnimationUtils.loadAnimation(this, R.anim.flipoutprevious);

        //admob widget - private AdView adView;

        adView = (AdView)findViewById(R.id.ad);

        adView.loadAd(new AdRequest());

        next = (Button) findViewById(R.id.Button01);

        previous = (Button) findViewById(R.id.Button02);

        next.setOnClickListener(this);

        previous.setOnClickListener(this);

    }

    //@Override

    public void onClick(View v) {

        if (v == next) {

            vf.setInAnimation(animFlipInNext);

            vf.setOutAnimation(animFlipOutNext);

            vf.showNext();

        }

        if (v == previous) {

            vf.setInAnimation(animFlipInPrevious);

            vf.setOutAnimation(animFlipOutPrevious);

            vf.showPrevious();

        }

    }

    //this is the part to handle Gesture Listener

    @Override

    public boolean onTouchEvent(MotionEvent me){

        return gestureScanner.onTouchEvent(me);

    }

    public boolean onDown(MotionEvent e){

        return true;

    }

    //FLING gesture listener

    public boolean onFling(MotionEvent e1,MotionEvent e2,float velocityX,float velocityY){

        try {

            if(e1.getX() > e2.getX() && Math.abs(e1.getX() - e2.getX()) > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {

                Toast.makeText(this.getApplicationContext(), "Left", Toast.LENGTH_SHORT).show();

                vf.setInAnimation(animFlipInPrevious);

                vf.setOutAnimation(animFlipOutPrevious);

                vf.showPrevious();

            }else if (e1.getX() < e2.getX() && e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {

                Toast.makeText(this.getApplicationContext(), "Right", Toast.LENGTH_SHORT).show();

                vf.setInAnimation(animFlipInNext);

                vf.setOutAnimation(animFlipOutNext);

                vf.showNext();

            }

        } catch (Exception e) {

            // nothing

        }

        return true;

    }

    public boolean onScroll(MotionEvent e1,MotionEvent e2,float distanceX,float distanceY){

        return true;

    }

    public void onLongPress(MotionEvent e){}

    public void onShowPress(MotionEvent e){}

    public boolean onSingleTapUp(MotionEvent e){ return true;}

}

Images;

All images are situated in the /res/drawable-mdpi

Complete project download;

You will find all source codes and images in the file, not to forget the Flashcard2.apk .Available for download here… (MS Skydrive - http://sdrv.ms/Q4LsXP) or (Google Drive - https://docs.google.com/open?id=0B34ZxOOoeSDdMVFiejVDY3ZxdWs)

All d best for your experiment…