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.

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)

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
}