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Flashcard Android Application

This is a simple flashcard Android application that contains images and pronunciations of the numbers. The apps contains numbers from 0 till 9. Navigation for previous and next number using image button. Voices are stored in MP3 audio format. Complete source code are also available for download using Eclipse Juno + ADT v 21.

Simple Number Flashcard Android AppsSimple Number Flashcard Android AppsSimple Number Flashcard Android Apps

Available in the Google Play –> https://play.google.com/store/apps/details?id=net.kerul.simplenumb3r5

Download the APK here –> https://docs.google.com/open?id=0B34ZxOOoeSDdanhBUlU3dWs3MFE

Download the complete source code here –> https://docs.google.com/open?id=0B34ZxOOoeSDdOGpIWk5Dd21mUDg

This apps does not implementing ViewFlipper yet (TODO).

The multimedia resources (available in the main source-code)

assets-simple-numbers-flashcardsdrawables-simple-numbers-flashcard

The main XML layout

<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"
    android:background="@drawable/bglight" >

    <TableLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true" >

        <TableRow
            android:id="@+id/tableRow1"
            android:layout_width="wrap_content"
            android:layout_height="0dp"
            android:layout_weight="1" >

            <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"
            android:layout_weight="1"
            ads:adSize="SMART_BANNER"
            ads:adUnitId="738a44d913034b9f"
            />
        </TableRow>
        <TableRow
            android:id="@+id/tableRow1"
            android:layout_width="wrap_content"
            android:layout_height="0dp"
            android:layout_weight="1" >

            <ImageView
                android:id="@+id/imagenumber"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:src="@drawable/no0" />
        </TableRow>

        <TableRow
            android:id="@+id/tableRow2"
            android:layout_width="wrap_content"
            android:layout_height="0dp"
            android:layout_weight="1" >

            <ImageButton
                android:id="@+id/btnprevious"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:src="@drawable/prev" />

            <ImageButton
                android:id="@+id/btninfo"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:src="@drawable/info" />

            <ImageButton
                android:id="@+id/btnsound"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:src="@drawable/sound" />

            <ImageButton
                android:id="@+id/btnnext"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:src="@drawable/next" />
        </TableRow>

    </TableLayout>

</RelativeLayout>


The Java Code






package net.kerul.simplenumb3r5;

import com.google.ads.AdRequest;
import com.google.ads.AdView;

import android.app.Activity;
import android.content.Intent;
import android.content.res.AssetFileDescriptor;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageButton;
import android.widget.ImageView;

public class SimpleNumb3r5 extends Activity implements OnClickListener{
    //define all widgets
    private ImageView imagenumber;
    private ImageButton btnprevious, btninfo, btnsound, btnnext;
    //define variables to track screen number, start from 0
    private int screennumber=0;
    protected AdView adView;
    //define a sound controller
    private MediaPlayer mp;
    //define an array for the sound files
    private String[] soundfile={"0.mp3","1.mp3","2.mp3","3.mp3","4.mp3",
                                "5.mp3","6.mp3","7.mp3","8.mp3","9.mp3"};

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_simple_numb3r5);
        //admob widget
        adView = (AdView)findViewById(R.id.ad);
        adView.loadAd(new AdRequest());
        
        imagenumber=(ImageView)findViewById(R.id.imagenumber);
        
        //initialize the object for the button
        btnprevious=(ImageButton)findViewById(R.id.btnprevious);
        //this button will innitially be disabled
        btnprevious.setEnabled(false);
        //add listener to the button
        btnprevious.setOnClickListener(this);
        btninfo=(ImageButton)findViewById(R.id.btninfo);
        btninfo.setOnClickListener(this);
        btnsound=(ImageButton)findViewById(R.id.btnsound);
        btnsound.setOnClickListener(this);
        btnnext=(ImageButton)findViewById(R.id.btnnext);
        btnnext.setOnClickListener(this);
        
    }//end onCreate
    
    //this method is to handle button click
    public void onClick(View arg0) {

        //when btnprevious is clicked
        if(arg0.getId()==R.id.btnprevious){
            screennumber--;//minus 1 to the screennumber
            changeNumber(screennumber);
            if(screennumber==0){
                //disable btnprevious
                btnprevious.setEnabled(false);
            }else{
                //enable btnprevious
                btnprevious.setEnabled(true);
            }
            changeNumber(screennumber);
            btnnext.setEnabled(true);
        }
        
        //when btnnext is clicked
        else if(arg0.getId()==R.id.btnnext){
            screennumber++;//add 1 to the screennumber
            changeNumber(screennumber);
            if(screennumber==9){
                //disable btnprevious
                btnnext.setEnabled(false);
            }else{
                //enable btnprevious
                btnnext.setEnabled(true);
            }
            changeNumber(screennumber);
            btnprevious.setEnabled(true);
                    
        }
        //when btnplay is clicked
        else if(arg0.getId()==R.id.btnsound){
            //call the method playSound
            playSound(soundfile[screennumber].toString());
        }//end btnsound clicked
        else if(arg0.getId()==R.id.btninfo){
            //invoke the Info activity
            Intent info = new Intent(this, Info.class);
            startActivity(info);
        }

    }//end onClick
    
    //this method is to change the number that appear on the screen
    //after navigation button is clicked
    private void changeNumber(int screen){
        switch (screen){
            case 0:  imagenumber.setImageResource(R.drawable.no0);
                break;
            case 1:  imagenumber.setImageResource(R.drawable.no1);
                break;
            case 2:  imagenumber.setImageResource(R.drawable.no2);
                break;
            case 3:  imagenumber.setImageResource(R.drawable.no3);
                break;
            case 4:  imagenumber.setImageResource(R.drawable.no4);
                break;
            case 5:  imagenumber.setImageResource(R.drawable.no5);
                break;
            case 6:  imagenumber.setImageResource(R.drawable.no6);
                break;
            case 7:  imagenumber.setImageResource(R.drawable.no7);
                break;
            case 8:  imagenumber.setImageResource(R.drawable.no8);
                break;
            case 9:  imagenumber.setImageResource(R.drawable.no9);
                break;
            
        }
    }//end changeNumber
    
    public void playSound(String soundName){
        Boolean mpPlayingStatus;
        
        try{//try to check MediaPlayer status
            mpPlayingStatus=mp.isPlaying();
        }
        catch (Exception e){
            mpPlayingStatus=false;
        }
        if(mpPlayingStatus==true){//if the MediaPlayer is playing a voice, stop it to play new voice
            mp.stop();
            mp.release();//remove sound from memory
        }
        else{
            try
            {
                mp = new MediaPlayer();
                AssetFileDescriptor afd = getAssets().openFd(soundName); 
                mp.setDataSource(afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength()); 
                mp.prepare();
                mp.start();//play sound
                
            }//try block
            catch(Exception e) {
                Log.i("Error playing sound: ", e.toString());
            }
        }
    }//end playSound
}

Labels:

Comments

  1. iOS AppsMarch 8, 2013 at 1:28 AM

    Great tutorial. I used your example & changed just the mp3 files but when you press next the previous audio continues to play! Please fix on your next update many thanks.

    ReplyDelete
    Replies
    1. FSTM KUISMarch 8, 2013 at 7:40 AM

      Thank you very much for your comment, I'll keep in mind to fix this in the next update.

      Delete
  2. iOS AppsMarch 8, 2013 at 6:04 PM

    Thank you.

    ReplyDelete
  3. iOS AppsMarch 8, 2013 at 6:04 PM

    Thank you.

    ReplyDelete

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