Programming Stuff

Coursework marks, FYP, etc - away on long vacation

2011-12-04T20:11:00.005+08:00

I am away on long holiday and will only be coming back to College in February or March, 2012. Meanwhile, just get your results from College. Please do not contact me directly!

Java Assignment

2011-10-06T09:22:00.002+08:00

CSC2104

2011-07-15T22:43:00.002+08:00

Marks below are temporary and will be adjusted after marking the final exam paper:

AdMob screenshots

2011-06-26T11:10:00.006+08:00

Assuming, I am developing Android apps/games. And testing on Milestone (Droid) and

Galaxy Tab.

This is the cropped ad banner when using 1.5 scaling:

This is the correct ad banner when not using scaling:

Assuming, I am developing Android apps/games on Corona and using Kam's AdMob Hack. Which choice should I use, A, B or C? (See below)

Build crash in Windows - Corona SDK - Solved

2011-06-19T12:57:00.004+08:00

Problem solved:

STEP 1:
Uninstall Corona SDK (I'm using Build 505 for Windows).

STEP 2:
I totally removed all traces of JAVA (jdk, updates, jre, everything) using Revo Uninstaller. Then, I re-installed Java JDK1.6.0_21 (the same version I had before the uninstall) from scratch.

STEP 3:
Re-install Corona SDK.

NOTE:

I avoided downloading and installing the latest JDK because it might break my Netbeans and Eclipse, and other Java Apps which I already have on my PC (which had their libraries config set on JDK1.6.0.21). Also note that this solution worked for me because the error was caused by java

path. See screenshot below. If your crash was caused by some other factor, then this might not work for you. Also, I am already subscribed to Corona when I found the solution.

Below is the screenshot of the error I had:

Android: Space Blaster Game

2010-07-16T15:49:00.001+08:00

Further Eclipse Fix after updating JDK

2010-07-15T16:34:00.002+08:00

You may also need to choose which JRE you wish to use in the Excutable Environment as shown above. Select Windows/Preferences/Java ...

Eclipse fix after updating JDK

2010-07-14T13:58:00.005+08:00

If Eclipse fails to start after updating JDK, do this.

Insert these two lines in eclipse.ini file:

-vm

C:\jdk1.6.0_20\jre\bin\client\jvm.dll

eg.

 -startup
plugins/org.eclipse.equinox.launcher_1.0.201.R35x_v20090715.jar
--launcher.library
plugins/org.eclipse.equinox.launcher.win32.win32.x86_1.0.200.v20090519
-product
org.eclipse.epp.package.jee.product
--launcher.XXMaxPermSize
256M
-showsplash
org.eclipse.platform
--launcher.XXMaxPermSize
256m
-vm
C:\jdk1.6.0_20\jre\bin\client\jvm.dll
-vmargs
-Dosgi.requiredJavaVersion=1.5
-Xms40m
-Xmx512m

Then add the path to your new JDK to your PATH environment variable:
C:\Program Files\Java\jdk1.6.0_21\bin; ....

Then delete the java.exe file from:

C:\Windows\System32

http://geekycoder.wordpress.com/2009/07/08/java-tips-adventure-in-resolving-the-java-error-error-occurred-during-initialization-of-vm/

Android Keeping Location Overlay in View

2010-07-14T00:54:00.005+08:00

I am manually simulating GPS activity. Note how the location is always animated to be always centred in the map.

main.xml layout file:

 <?xml version="1.0" encoding="utf-8"?>
<!-- This file is /res/layout/main.xml -->
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent">
<com.google.android.maps.MapView
 android:id="@+id/geoMap" android:clickable="true"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 android:apiKey="XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
 />
</RelativeLayout>

main activity file:

 package com.mld;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;
import com.google.android.maps.MyLocationOverlay;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.widget.Toast;
public class MyLocationDemo extends MapActivity {
MapView mapView = null;
MyLocationOverlay whereAmI = null;
LocationManager locMgr = null;
LocationListener locListener = null;
@Override
protected boolean isLocationDisplayed() {
 return whereAmI.isMyLocationEnabled();
}
@Override
protected boolean isRouteDisplayed() {
 return false;
}
@Override
public void onCreate(Bundle savedInstanceState)
{
 super.onCreate(savedInstanceState);
 setContentView(R.layout.main);
 mapView = (MapView)findViewById(R.id.geoMap);
 mapView.setBuiltInZoomControls(true);
 mapView.getController().setZoom(15);
 whereAmI = new MyLocationOverlay(this, mapView);
 mapView.getOverlays().add(whereAmI);
 mapView.postInvalidate();
 locMgr = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
 locListener = new LocationListener()
 {
   public void onLocationChanged(Location location)
   {
        showLocation(location);
   }
   public void onProviderDisabled(String provider)
   {
   }
   public void onProviderEnabled(String provider)
   {
   }
   public void onStatusChanged(String provider,
     int status, Bundle extras)
   {
   }
 };
}
@Override
public void onResume()
{
 super.onResume();
 Location lastLoc = locMgr.getLastKnownLocation(LocationManager.GPS_PROVIDER);
 showLocation(lastLoc);
 locMgr.requestLocationUpdates(
   LocationManager.GPS_PROVIDER,
   1000,               // minTime in ms
   1,               // minDistance in meters
   locListener);
 whereAmI.enableMyLocation();
 whereAmI.runOnFirstFix(new Runnable() {
   public void run() {
     mapView.getController().setCenter(whereAmI.getMyLocation());
   }
 });
}
@Override
public void onPause()
{
 super.onPause();
 locMgr.removeUpdates(locListener);
 whereAmI.disableMyLocation();
}
private void showLocation(Location location) {
 if (location != null)
 {
      double lat = location.getLatitude();
      double lng = location.getLongitude();
   GeoPoint myLocation = new GeoPoint(
     (int)(lat*1000000),
     (int)(lng*1000000));
   Toast.makeText(getBaseContext(),
     "New location latitude [" +
     lat + "] longitude [" + lng +"]",
     Toast.LENGTH_SHORT).show();
   mapView.getController().animateTo(myLocation);
 }
}
}

Android Location Manager

2010-07-13T22:56:00.003+08:00

Download a gpx file and put in any folder, in this case GPX Files folder. Then load it from DDMS Emulator GPX tab.

Below is the main activity file. No xml layout file needed. Run the bottom part of GPX file which is collection of points by clicking on the play button of the DDMS. This simulates GPS tracking.

 package com.lmda;
import android.app.Activity;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.widget.Toast;
public class LocationManagerDemoActivity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         LocationManager locMgr = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
         LocationListener locListener = new LocationListener() {
              public void onLocationChanged(Location location) {
                   if (location != null) {
                        Toast.makeText(
                                  getBaseContext(),
                                  "New location latitude [" + location.getLatitude()
                                            + "] longitude [" + location.getLongitude()
                                            + "]", Toast.LENGTH_SHORT).show();
                   }
              }
              public void onProviderDisabled(String provider) {
              }
              public void onProviderEnabled(String provider) {
              }
              public void onStatusChanged(String provider, int status,
                        Bundle extras) {
              }
         };
         locMgr.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, // minTime
                                                                                         // in ms
                   0, // minDistance in meters
                   locListener);
    }
}

GPX files download

2010-07-13T21:23:00.003+08:00

http://www.gpxchange.com/

Android Multi-Threaded Geocoding

2010-07-13T16:53:00.005+08:00

This version uses multi-threading to run the geocoder.getFromLocationName() method in a separate thread for improved performance.

 <?xml version="1.0" encoding="utf-8"?>
<!-- This file is /res/layout/geocode.xml -->
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent" android:layout_height="fill_parent">
  <LinearLayout android:layout_width="fill_parent"
       android:layout_alignParentBottom="true" android:layout_height="wrap_content"
       android:orientation="vertical">
       <EditText android:layout_width="fill_parent" android:id="@+id/location"
            android:layout_height="wrap_content" android:text="Enter location" />
       <Button android:id="@+id/geocodeBtn" android:layout_width="wrap_content"
            android:layout_height="wrap_content" android:text="Find Location" />
  </LinearLayout>
  <com.google.android.maps.MapView
       android:id="@+id/geoMap" android:clickable="true"
       android:layout_width="fill_parent" android:layout_height="320px"
       android:apiKey="XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" />
</RelativeLayout>

 package com.gta;
import java.io.IOException;
import java.util.List;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.location.Address;
import android.location.Geocoder;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;
public class GeocodingThreadActivity extends MapActivity
{
Geocoder geocoder = null;
MapView mapView = null;
ProgressDialog progDialog=null;
List<Address> addressList=null;
@Override
protected boolean isLocationDisplayed() {
 return false;
}
@Override
protected boolean isRouteDisplayed() {
 return false;
}
@Override
protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.geocode);
 mapView = (MapView)findViewById(R.id.geoMap);
 mapView.setBuiltInZoomControls(true);
 // lat/long of IICP
 GeoPoint pt = new GeoPoint((int)(5.34079*1000000),(int)(100.28241*1000000));
 mapView.getController().setZoom(10);
 mapView.getController().setCenter(pt);
 Button geoBtn =(Button)findViewById(R.id.geocodeBtn);
 geocoder = new Geocoder(this);
 geoBtn.setOnClickListener(new OnClickListener(){
   @Override
   public void onClick(View view) {
     EditText loc = (EditText)findViewById(R.id.location);
     String locationName = loc.getText().toString();
     progDialog = ProgressDialog.show(GeocodingThreadActivity.this, "Processing...", "Finding Location...", true, false);
     findLocation(locationName);
   }});
}
private void findLocation(final String locationName)
{
 Thread thrd = new Thread()
 {
   public void run()
   {
     try {
       // do backgrond work
       addressList = geocoder.getFromLocationName(locationName, 5);
       //send message to handler to process results
       uiCallback.sendEmptyMessage(0);
     } catch (IOException e) {
       e.printStackTrace();
     }
   }
 };
 thrd.start();
}
// ui thread callback handler
private Handler uiCallback = new Handler()
{
 @Override
 public void handleMessage(Message msg)
 {
   progDialog.dismiss();
   if(addressList!=null && addressList.size()>0)
   {
     int lat = (int)(addressList.get(0).getLatitude()*1000000);
     int lng = (int)(addressList.get(0).getLongitude()*1000000);
     GeoPoint pt = new GeoPoint(lat,lng);
     mapView.getController().setZoom(15);
     mapView.getController().setCenter(pt);
   }
   else
   {
     Dialog foundNothingDlg = new AlertDialog.Builder(GeocodingThreadActivity.this)
      .setIcon(0)
      .setTitle("Failed to Find Location")
      .setPositiveButton("Ok", null)
      .setMessage("Location Not Found...")
     .create();
     foundNothingDlg.show();
   }
 }
};
}

Android Geocoding

2010-07-13T11:40:00.005+08:00

geocode.xml layout:

 <?xml version="1.0" encoding="utf-8"?>
<!-- This file is /res/layout/geocode.xml -->
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:layout_width="fill_parent" android:layout_height="fill_parent">
   <LinearLayout android:layout_width="fill_parent"
        android:layout_alignParentBottom="true" android:layout_height="wrap_content"
        android:orientation="vertical">
        <EditText android:layout_width="fill_parent" android:id="@+id/location"
             android:layout_height="wrap_content" android:text="White House" />
        <Button android:id="@+id/geocodeBtn" android:layout_width="wrap_content"
             android:layout_height="wrap_content" android:text="Find Location" />
   </LinearLayout>
   <com.google.android.maps.MapView
        android:id="@+id/geoMap" android:clickable="true"
        android:layout_width="fill_parent" android:layout_height="320px"
        android:apiKey="XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" />
</RelativeLayout>

GeocodingDemoActivity.java main activity class:

 package com.gda;
import java.io.IOException;
import java.util.List;
import android.location.Address;
import android.location.Geocoder;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;
public class GeocodingDemoActivity extends MapActivity
{
Geocoder geocoder = null;
MapView mapView = null;
@Override
protected boolean isLocationDisplayed() {
  return false;
}
@Override
protected boolean isRouteDisplayed() {
  return false;
}
@Override
protected void onCreate(Bundle savedInstanceState)
{
  super.onCreate(savedInstanceState);
  setContentView(R.layout.geocode);
  mapView = (MapView)findViewById(R.id.geoMap);
  mapView.setBuiltInZoomControls(true);
  // lat/long of IICP
  GeoPoint pt = new GeoPoint((int)(5.34079*1000000),(int)(100.28241*1000000));
  mapView.getController().setZoom(10);
  mapView.getController().setCenter(pt);
  Button geoBtn =(Button)findViewById(R.id.geocodeBtn);
  geocoder = new Geocoder(this);
  geoBtn.setOnClickListener(new OnClickListener(){
  @Override
  public void onClick(View arg0) {
    try {
      EditText loc = (EditText)findViewById(R.id.location);
      String locationName = loc.getText().toString();
      List<Address> addressList = geocoder.getFromLocationName(locationName, 5);
      if(addressList!=null && addressList.size()>0)
      {
        int lat = (int)(addressList.get(0).getLatitude()*1000000);
        int lng = (int)(addressList.get(0).getLongitude()*1000000);
        GeoPoint pt = new GeoPoint(lat,lng);
        mapView.getController().setZoom(15);
        mapView.getController().setCenter(pt);
      }
    } catch (IOException e) {
      e.printStackTrace();
    }
  }});
}
}

Android Map API Overlay

2010-07-12T23:40:00.007+08:00

This example puts a mapmarker (orange teardrop balloon image) on IICP.

You need to put the mapmarker.png image in res/drawable folder.

MappingOverlayActivity.java

 package com.moa;
import java.util.ArrayList;
import java.util.List;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.View;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.ItemizedOverlay;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;
import com.google.android.maps.OverlayItem;
public class MappingOverlayActivity extends MapActivity {
private MapView mapView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mapview);
mapView = (MapView) findViewById(R.id.mapview);
mapView.setBuiltInZoomControls(true);
mapView.setClickable(true);
Drawable marker=getResources().getDrawable(R.drawable.mapmarker);
marker.setBounds(0, 0, marker.getIntrinsicWidth(),
               marker.getIntrinsicHeight());
InterestingLocations funPlaces = new InterestingLocations(marker);
mapView.getOverlays().add(funPlaces);
GeoPoint pt = funPlaces.getCenter();  // get the first-ranked point
mapView.getController().setCenter(pt);
mapView.getController().setZoom(15);   // cheating. We could iterate
                     // and figure out a proper zoom.
}
@Override
protected boolean isLocationDisplayed() {
return false;
}
@Override
protected boolean isRouteDisplayed() {
return false;
}
public void myClickHandler(View target) {
switch(target.getId()) {
case R.id.sat:
     mapView.setSatellite(true);
     break;
case R.id.street:
     mapView.setStreetView(true);
     break;
case R.id.traffic:
     mapView.setTraffic(true);
     break;
case R.id.normal:
     mapView.setSatellite(false);
     mapView.setStreetView(false);
     mapView.setTraffic(false);
     break;
}
}
class InterestingLocations extends ItemizedOverlay {
private List<OverlayItem> locations = new ArrayList<OverlayItem>();
private Drawable marker;
public InterestingLocations(Drawable marker)
{
  super(marker);
  this.marker=marker;
  //5.34079, 100.28241 is IICP's lat and long
  GeoPoint npark = new GeoPoint((int)(5.34079*1000000),(int)(100.28241*1000000));
  locations.add(new OverlayItem(npark , "IICP", "IICP"));
  populate();
}
@Override
public void draw(Canvas canvas, MapView mapView, boolean shadow) {
  super.draw(canvas, mapView, shadow);
  boundCenterBottom(marker);
}
@Override
protected OverlayItem createItem(int i) {
  return locations.get(i);
}
@Override
public int size() {
  return locations.size();
}
}
}

mapview.xml layout

 <?xml version="1.0" encoding="utf-8"?>
<!-- This file is /res/layout/mapview.xml -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical" android:layout_width="fill_parent"
 android:layout_height="fill_parent">
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:orientation="horizontal" android:layout_width="fill_parent"
      android:layout_height="wrap_content">       
      <Button android:id="@+id/sat" android:layout_width="wrap_content"
           android:layout_height="wrap_content" android:text="Satellite"
           android:onClick="myClickHandler" android:padding="8px" />
      <Button android:id="@+id/street" android:layout_width="wrap_content"
           android:layout_height="wrap_content" android:text="Street"
           android:onClick="myClickHandler" android:padding="8px" />
      <Button android:id="@+id/traffic" android:layout_width="wrap_content"
           android:layout_height="wrap_content" android:text="Traffic"
           android:onClick="myClickHandler" android:padding="8px" />
      <Button android:id="@+id/normal" android:layout_width="wrap_content"
           android:layout_height="wrap_content" android:text="Normal"
           android:onClick="myClickHandler" android:padding="8px" />
 </LinearLayout>
 <com.google.android.maps.MapView
      android:id="@+id/mapview" android:layout_width="fill_parent"
      android:layout_height="wrap_content" android:clickable="true"
      android:apiKey="XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" />
</LinearLayout>

Android Google Map API programming - Easy Zoom

2010-07-12T21:34:00.007+08:00

The above map implementation is easier than the previous post. It uses the built-in zoom (at bottom of screen) capability of Google Map API.

The main Activity class:

 package com.mvez;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;
import android.app.Activity;
import android.os.Bundle;
public class MapViewEasierZoom extends MapActivity {
private MapView mapView;
@Override
protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.mapview);
   mapView = (MapView) findViewById(R.id.mapview);
   mapView.setBuiltInZoomControls(true);
}
@Override
protected boolean isLocationDisplayed() {
   return false;
}
@Override
protected boolean isRouteDisplayed() {
   return false;
}
}

The mapview.xml layout. Be sure to substitute your map api key in place of XXXXX:

 <?xml version="1.0" encoding="utf-8"?>
<!-- This file is /res/layout/mapview.xml -->
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<com.google.android.maps.MapView android:id="@+id/mapview"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:clickable="true"
android:apiKey="XXXXXXXXXXXXXXXXXXXXXXXXXX"
/>
</RelativeLayout>

Android - reminder to add uses-library for google map API

2010-07-12T21:13:00.006+08:00

Remember to insert the red-highlighted part above, else the map will fail.

Android Map API Programming - How to set use-permissions

2010-07-12T16:56:00.006+08:00

Android Google Map API programming

2010-07-12T11:48:00.005+08:00

The layout in XML (substitute Map API key in XXXX... ):

 <?xml version="1.0" encoding="utf-8"?>
<!-- This file is /res/layout/mapview.xml -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical" android:layout_width="fill_parent"
  android:layout_height="fill_parent">
  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
       android:orientation="horizontal" android:layout_width="fill_parent"
       android:layout_height="wrap_content">
       <Button android:id="@+id/zoomin" android:layout_width="wrap_content"
            android:layout_height="wrap_content" android:text="+"
            android:onClick="myClickHandler" android:padding="12px" />
       <Button android:id="@+id/zoomout" android:layout_width="wrap_content"
            android:layout_height="wrap_content" android:text="-"
            android:onClick="myClickHandler" android:padding="12px" />
       <Button android:id="@+id/sat" android:layout_width="wrap_content"
            android:layout_height="wrap_content" android:text="Satellite"
            android:onClick="myClickHandler" android:padding="8px" />
       <Button android:id="@+id/street" android:layout_width="wrap_content"
            android:layout_height="wrap_content" android:text="Street"
            android:onClick="myClickHandler" android:padding="8px" />
       <Button android:id="@+id/traffic" android:layout_width="wrap_content"
            android:layout_height="wrap_content" android:text="Traffic"
            android:onClick="myClickHandler" android:padding="8px" />
       <Button android:id="@+id/normal" android:layout_width="wrap_content"
            android:layout_height="wrap_content" android:text="Normal"
            android:onClick="myClickHandler" android:padding="8px" />
  </LinearLayout>
  <com.google.android.maps.MapView
       android:id="@+id/mapview" android:layout_width="fill_parent"
       android:layout_height="wrap_content" android:clickable="true"
       android:apiKey="XXXXXXXXXXXXXXXXXXXXXXXXXX" />
</LinearLayout>

The main activity:

 package com.mvda; 
// This file is MapViewDemoActivity.java 
import android.os.Bundle; 
import android.view.View; 
import com.google.android.maps.MapActivity; 
import com.google.android.maps.MapView; 
public class MapViewDemoActivity extends MapActivity 
{ 
  private MapView mapView; 
  @Override 
  protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.mapview); 
    mapView = (MapView)findViewById(R.id.mapview); 
  } 
  public void myClickHandler(View target) { 
    switch(target.getId()) { 
    case R.id.zoomin: 
         mapView.getController().zoomIn(); 
         break; 
    case R.id.zoomout: 
         mapView.getController().zoomOut(); 
         break; 
    case R.id.sat: 
         mapView.setSatellite(true); 
         break; 
    case R.id.street: 
         mapView.setStreetView(true); 
         break; 
    case R.id.traffic: 
         mapView.setTraffic(true); 
         break; 
    case R.id.normal: 
         mapView.setSatellite(false); 
         mapView.setStreetView(false); 
         mapView.setTraffic(false); 
         break; 
    } 
  } 
  @Override 
  protected boolean isLocationDisplayed() { 
    return false; 
  } 
  @Override 
  protected boolean isRouteDisplayed() { 
    return false; 
  } 
}

Google Maps Setting

2010-07-11T22:44:00.006+08:00

Before you can use MapUI or MapActivity, you will need to add the Google API as shown above.

Right click the project, the select properties, then select Google API. This wil insert Android + Google API.

Prior to that you will have to get Google Map API keys as follows:

keytool -list -keystore "C:\Documents and Settings\YourName\.android\debug.keystore"

Output (Debug key):

Certificate fingerprint (MD5): XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX

Getting the release key

keytool -list -keystore "D:\My Documents\Android\eclipse-java-helios-win32\eclipse\keystore_yourname"

Output (Release key):

Certificate fingerprint (MD5): XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX

Note that the path will be different on your system.

Then, head on to http://code.google.com/android/maps-api-signup.html to register for

the Map API keys by entering the MD5 keys above.

How to use Android Log

2010-07-11T19:55:00.007+08:00

Create ViewAnimationListener.java class:

 package com.ava;
import android.util.Log;
import android.view.animation.Animation;
public class ViewAnimationListener implements Animation.AnimationListener {
public ViewAnimationListener() {
}
public void onAnimationStart(Animation animation) {
     Log.d("Animation Example", "onAnimationStart");
}
public void onAnimationEnd(Animation animation) {
     Log.d("Animation Example", "onAnimationEnd");
}
public void onAnimationRepeat(Animation animation) {
     Log.d("Animation Example", "onAnimationRepeat");
}
}

http://about-android.blogspot.com/2009/12/working-with-alert-log-notification-in.html

Android 3D Camera class

2010-07-11T17:10:00.006+08:00

Note that 3D Camera class is not the physical camera of the phone. It is a 3D Class that provides 3D to objects in 2D.

Use the same ViewAnimation.java class from the previous post, and change the method applyTransformation as follows:

   protected void applyTransformation(float interpolatedTime, Transformation t) {
    float centerX = (float)v.getWidth()/2, centerY = (float)v.getHeight()/2;
    final android.graphics.Matrix matrix = t.getMatrix();
    camera.save();
    camera.translate(0.0f, 0.0f, (1300 - 1300.0f * interpolatedTime));
    camera.rotateY(360 * interpolatedTime);
    camera.getMatrix(matrix);
    matrix.preTranslate(-centerX, -centerY);
    matrix.postTranslate(centerX, centerY);
    camera.restore();
}

Note that you could also experiment with the following:

        camera.rotateY(360 * interpolatedTime); 
       camera.rotateX(360 * interpolatedTime); 
       camera.rotateZ(360 * interpolatedTime);

View-based Animation

2010-07-11T16:48:00.008+08:00

The main activity file (AnimationViewAnimation.java) :

 package com.ava;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
public class AnimationViewAnimation extends Activity {
  ListView lv;
  @Override
  public void onCreate(Bundle savedInstanceState)
  {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.list_layout);
   setupListView();
   this.setupButton();
  }
  private void setupListView()
  {
   String[] listItems = new String[]
   {
     "Item 1", "Item 2", "Item 3",
     "Item 4", "Item 5", "Item 6",
   };
   ArrayAdapter listItemAdapter =
      new ArrayAdapter(this
      ,android.R.layout.simple_list_item_1
      ,listItems);
   lv = (ListView)this.findViewById(R.id.list_view_id);
   lv.setAdapter(listItemAdapter);
  }
  private void setupButton()
  {
   Button b = (Button)this.findViewById(R.id.btn_animate);
   b.setOnClickListener(
     new Button.OnClickListener(){
      public void onClick(View v)
      {
        animateListView();
      }
     });
  }
  private void animateListView()
  {
   ListView lv = (ListView)this.findViewById(R.id.list_view_id);
   lv.startAnimation(new ViewAnimation(lv));
  }
}

The animation class (ViewAnimation.java):

 package com.ava;
import android.app.Activity;
import android.opengl.Matrix;
import android.text.Layout;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.LinearInterpolator;
import android.view.animation.Transformation;
import android.widget.ListView;
public class ViewAnimation extends Animation
{ ListView v;
public ViewAnimation(ListView _v){v = _v;}
@Override
public void initialize(int width, int height, int parentWidth,
             int parentHeight)
{
super.initialize(width, height, parentWidth, parentHeight);
setDuration(2500);
setFillAfter(true);
setInterpolator(new LinearInterpolator());
}
@Override
protected void applyTransformation(float interpolatedTime, Transformation t)
{ float centerX = (float)v.getWidth()/2, centerY = (float)v.getHeight()/2;
final android.graphics.Matrix matrix = t.getMatrix();
matrix.setScale(interpolatedTime, interpolatedTime);
matrix.preTranslate(-centerX, -centerY);
matrix.postTranslate(centerX, centerY);
}
}

The layout file (list_layout.xml):

 <?xml version="1.0" encoding="utf-8"?>
<!-- This file is at /res/layout/list_layout.xml -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<Button
android:id="@+id/btn_animate"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Start Animation"
/>
<ListView
android:id="@+id/list_view_id"
android:persistentDrawingCache="animation|scrolling"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
/>
</LinearLayout>

The java files put in src folder.
The layout xml file put in res/layout folder.

Layout Animation - Interpolators

2010-07-11T13:55:00.004+08:00

The supported interpolators include:

AccelerateDecelerateInterpolator

AccelerateInterpolator

CycleInterpolator

DecelerateInterpolator

LinearInterpolator

AnticipateInterpolator

AnticipateOvershootInterpolator

BounceInterpolator

OvershootInterpolator

The example above shows bounce_interpolator in rotation animation.

Accelerate interpoloatar is accesed as: accelerator_interpolator.

Watch the video:

Layout Animation - Rotation Animation

2010-07-11T13:43:00.002+08:00

Layout Animation - Translation + Alpha Animation

2010-07-11T13:36:00.002+08:00

Layout Animation - Alpha Animation

2010-07-11T13:30:00.002+08:00

Layout Animation - Scale Animation

2010-07-11T13:18:00.003+08:00

2D animation frame-by-frame

2010-07-11T10:41:00.005+08:00

Click on button Start Animation. The red spray will move clockwise around the screen.

Frame by frame animation

The layout for the screen in xml.

The main Activity.

A Simpler Dialog

2010-07-10T21:26:00.005+08:00

1. Click on Test menuitem and a simple Dialog box shows.

2. The menu xml design.

3. This is easier. Just create the Dialog box within the Activity class!

Alert boxes

2010-07-10T12:00:00.004+08:00

1. Click on OK menuitem from Menu and Alert Window shows.

2. Create the strings in xml

3. Create the menu in xml.

4. In the main activity, do the menu and event handler that calls Alert.

5. This is the Alert class and its handler.

Putting icons in XML created Menu

2010-07-10T00:38:00.005+08:00

Make sure to put the icons in the res/drawable folders

An icon each for the first two menu-items.

Creating Menus the XML way

2010-07-09T23:56:00.005+08:00

When you click menu and select Test menu-item, the textview on displays the message.

Inflate (from xml) the menu and handle the menu selection event

Give an id to textview so that it can be referenced from Activity

Here's where the menu is designed in XML.

How to add icon to menu item

2010-07-09T21:31:00.004+08:00

1. Note the icon in the append menu item.

2. To set the icon, put the append.png icon in the drawable folder, then call the seticon

method of the MenuItem.

How to changle Title Bar Label

2010-07-09T21:18:00.002+08:00

1. Modify the AndroidManifest.xml file as shown above.

2. Note the new title "My Cool Menus"

Responding to Menu clicks

2010-07-09T20:27:00.005+08:00

1. Respond to menu clicks by overriding Activity's onOptionsItemSelected method

2. The TextView shows the MenuItem selected

Menus

2010-07-09T19:51:00.005+08:00

1. Add menu by overriding Activity's onCreateOptionMenus

2. The menu is accessed through the phone's MENU button.

Spinners

2010-07-09T00:38:00.006+08:00

1. Listener for the Spinner's item state change event

2. The main Activity.

3. The UI in XML

4. Output of spinner (drop-down list)

5. Selection is displayed in TextView (top) and Toast (below).

A toast is a message box.

Android supported screen sizes

2010-07-08T21:50:00.002+08:00

http://developer.android.com/guide/practices/screens_support.html

CSC 2104 Coursework Marks - July 8, 2010

2010-07-08T16:55:00.001+08:00

How to create APK files

2010-07-07T16:44:00.003+08:00

In Eclipse, right-click the project folder, then select one of the menu-items highlighted in red above.

Android Programming

2010-07-07T11:31:00.005+08:00

1. First create the UI elements with XML

2. Then, retrieve the UI elements and program the logic in Java

3. Output - When ToggleButton or CheckBox is clicked, the TextView is updated with a string

Note:

What you design in the main.xml file must be saved and built so that the R.java file is built.

R.java converts the XML into java binary so that it can be accessed in the Activity.java source code (which is the main).

Absolute Layout in Netbeans

2010-06-28T13:57:00.000+08:00

On bottom left hand of Netbeans IDE.

PC Webcam Biofeedback

2010-06-09T19:27:00.006+08:00

Free software that enables you to use any ordinary webcam
to track breathing and heart rate variability:

http://www.webcambiofeedback.com/

Please feedback to me any experience you have using this software.

CSC202 Coursework Marks (April 17)

2010-04-17T10:33:00.002+08:00

Congrats! Everyone has done very well scoring above 50% of

the Total Coursework marks.

Good luck in your Finals!

CSC202 Revision April 15

2010-04-14T12:59:00.005+08:00

QUESTION:

(a) Use the typedef construct to define a type EMPLOYEE for a structure employee_record of the

following properties:

Name

Salary

Age

Address

Employee number

(b) Declare an array of 100 structures for EMPLOYEE

number whose age is between 40 to 50 years old.

QUESTION:

(a) create a link list structure with the following members:
name, age, next

(b)
Complete the following function to insert a node at the top of a linked list.
void insertnode(struct node **head)
{
}

CSC202 Revision April 14 - Part 3

2010-04-12T11:42:00.003+08:00

QUESTION:

Note that (a), (b),(c) and (d) below are all related to the same program. The program converts

any given currency into USD.

(a) Write the a function prototype called convert() that takes the value of any currency and

returns the USD currency.

(b) Write a main function, then, declare variable currency of type float and declare another

variable usd_currency of type float.

Within this loop, do the following:

(i) prompt the user: “Enter currency value, 0 to quit: “

(ii) get the input using function scanf() and storing it in variable currency

(iii) using an if statement, quit the program if user enters 0.

(iv) prompt the user: “Enter Currency/USD exchange rate: “

(v) get the input using function scanf() and storing it in variable rate

(vi) call function convert(), passing it the value currency and rate and

storing the return value in usd_currency.

(vii) print the result, eg, “100.00 = USD 139.00”

(d) Write the function definition for the function convert().

SOLUTION:

(a)

float usd convert(float foreign);

(b)

float rate=0;

void main(){

float currency, usd_currency;

}

(c)

for(;;){

printf("Enter currency value, 0 to quit: ");

scanf("%f",&currency);

if(currency==0) return;

printf("Enter Currency/USD exchange rate: ");

scanf("%f",&rate);

usd_currency = convert(currency,rate);

printf("%.2f = USD %.2f\n",currency,usd_currency);

}

(c)

float convert(float currency){

return currency * rate;

}

CSC202 Revision April 14 - Part 2

2010-04-12T11:40:00.001+08:00

QUESTION:

Write the main program that will call the triplingByReference function. Create a

variable called number and assign it the value 5. Then call triplingByReference passing

the address of number as the parameter. The function will triple the value stored in

number then store the result back into number. Then print out the result by printing the

new value stored in number.

SOLUTION:

//(a)

void doublingByRef(int *nPtr);

//(b)

void triplingByReference(int *nPtr){

*nPtr = *nPtr * 3;

//*nPtr = 3 * *nPtr;

}

//(c)

void main(){

int number=5;

triplingByReference(&number);

printf("%d\n",number);

}

CSC202 Revision April 14

2010-04-12T10:57:00.001+08:00

Note: above is solution to Question 2

QUESTION 1:

Develop a program that will determine the gross pay for each of several employees. The
company pays "straight-time" for the first 40 hours worked by each employee and pays "timeand-
a-half" for all hours worked in excess of 40 hours. You are given a list of employees of the
company, the number of hours each employee worked last week and the hourly rate of each
employee. Your program should input this information for each employee, and should
determine and display the employee's gross pay. Here is a sample input/output dialog:
Enter # of hours worked: 41
Enter hourly rate of the worker: 10.00
Salary is $415.00

SOLUTION:

#include "stdio.h"

void main(){
float hours_worked,hourly_rate,salary;

printf("Enter # of hours worked: ");
scanf("%f",&hours_worked);

printf("Enter hourly rate of the worker: ");
scanf("%f",&hourly_rate);

if(hours_worked<=40){
salary = hours_worked*hourly_rate;
}else{
salary = 40*hourly_rate + (hours_worked-40)*hourly_rate*1.5;
}

printf("Salary is $%.2f\n",salary);
}

QUESTION 2:
(a) Define an array to input 10 elements of type string (hint: use char array);
string “hello”.

(c) Write a loop to print out all the array elements in (b).

SOLUTION 2:

CSC202: Link List

2010-04-07T12:27:00.002+08:00

Write a program that can display the following menu:

1. Insert Record

2. Search Record

3. Delete Record

4. Print Record

5. Exit

The user will enter 1, 2,3, 4 or 5. Then the program will perform

the appropriate task. Use link list to implement. Use separate functions

for each of the above.

SOLUTION:

#include "stdio.h"

#include "stdlib.h"

#include "string.h"

struct node

{

char firstname[32];

struct node* next;

};

typedef struct node NODE;

void menu(void);

void insert();

void searchlist();

void deletenode();

void printlist();

NODE *root = NULL;

void main()

{

int choice;

for(;;)

{

menu();

scanf("%d",&choice);

switch(choice)

{

case 1:

insert();

break;

case 2:

searchlist();

break;

case 3:

deletenode();

break;

case 4:

printlist();

break;

default:

return;

}

void menu()

{

printf("\n\n1. Insert Record\n");

printf("2. Search Record\n");

printf("3. Delete Record\n");

printf("4. Print Record\n");

printf("5. Exit\n\n");

}

void insert()

{

NODE *pointer;

//--- if first node ---

if(root==NULL)

{ //memory allocation

pointer = (NODE*)malloc( sizeof(NODE) );

root = pointer;

}

else

{

pointer=root;

while(pointer->next!=NULL)

{

pointer=pointer->next;

}

pointer->next = (NODE*)malloc( sizeof(NODE) );

pointer=pointer->next;

}

char firstname[32]={0};

puts("Enter firstname: ");

scanf("%s",firstname);

strcpy(pointer->firstname,firstname);

pointer->next=NULL;

printlist();

}

void searchlist()

{

NODE *pointer;

pointer = root;

char firstname[32]={0};

puts("Enter firstname: ");

scanf("%s",firstname);

while(pointer!=NULL)

{

if(strcmp(pointer->firstname,firstname)==0)

{

puts("Found");

printf("Firstname: %s\n",pointer->firstname);

return;

}

//printf("%s -> ",pointer->firstname);

pointer=pointer->next;

}

puts("NO Records Found");

}

void deletenode()

{

NODE *pointer, *previous;

pointer = root;

char firstname[32]={0};

puts("Enter firstname: ");

scanf("%s",firstname);

while(pointer!=NULL)

{

if(strcmp(root->firstname,firstname)==0) {

root = root->next;

printlist();

return;

}

if(strcmp(pointer->firstname,firstname)==0)

{

previous->next=pointer->next;

printlist();

return;

}

//printf("%s -> ",pointer->firstname);

previous=pointer;

pointer=pointer->next;

}

puts("NO Records Found");

}

void printlist()

{

NODE *pointer;

pointer = root;

while(pointer!=NULL)

{

printf("%s -> ",pointer->firstname);

pointer=pointer->next;

}

Webcam Biofeedback

2010-04-03T21:50:00.004+08:00

Webcam Biofeedback - Tracks breathing and displays graph of heart rate variability:

http://www.youtube.com/watch?v=0L6Q3id4x2k

You can download it here (it's free - full version):

http://forumfiles.thegamecreators.com/download/1985167

After trying, please feedback to me so that I can improve on it. I...t uses an ordinary webcam to detect breathing and simulate heart rate variability. Download includes a user manual. Your webcam needs to be 640x480 resolution (which is what most webcams are). You can use this program to train for heart coherence similar to Wild Divine's Grapher program.

Below is a video showing comparison study between Webcam Biofeedback and Wild Divine's grapher:

http://www.youtube.com/watch?v=lnijwOA0ki0

Lab Exercise 2: April 1, 2010

2010-04-01T15:49:00.002+08:00

Rewrite the previous exercise to store the record inside a file called
data.txt. One line one record.

Also write a function to read from the file and print out the contents.

SOLUTION:
#include "stdio.h"
#include "string.h"

typedef struct name {
char firstname[16];
char lastname[16];
}NAME;

typedef struct student{
char id;
NAME studentname;
}STUDENT;

void main(){
FILE *f;
f = fopen("C:\\data.txt","w");
STUDENT csc202[2];

//--input---
for(int i=0; i<2; i++){
puts("enter id: ");
scanf("%c",&csc202[i].id);
fflush(stdin);
puts("enter firstname: ");
scanf("%s",csc202[i].studentname.firstname);
fflush(stdin);
puts("enter lastname: ");
scanf("%s",csc202[i].studentname.lastname);
fflush(stdin);
fprintf(f,"%c %s %s\n",
csc202[i].id, csc202[i].studentname.firstname,
csc202[i].studentname.lastname);
}
fclose(f);

//---output---
char myid; char firstname[16]={0},lastname[16]={0};
f = fopen("C:\\data.txt","r");
for(int i=0; i<2; i++){
fscanf(f,"%c%s%s",&myid,firstname,lastname);
printf("id: %c\nfirstname: %s\nlastname: %s\n",
myid,firstname,lastname);
}
fclose(f);

}

CSC202: Lab exercise April 1, 2010

2010-04-01T14:39:00.003+08:00

Write a program that can store 2 student record using the following
structures:

#include
#include "string.h"

typedef struct name {
char firstname[16];
char lastname[16];
}NAME;

typedef struct student{
char id;
NAME studentname;
}STUDENT;

void main(){
STUDENT csc202[2]; //use an array

...
}

The program will use a loop to input 2 records into the array, then use
a separate loop to print out the contents of the array.

SOLUTION:
#include "stdio.h"
#include "string.h"

typedef struct name {
char firstname[16];
char lastname[16];
}NAME;

typedef struct student{
char id;
NAME studentname;
}STUDENT;

void main(){
STUDENT csc202[2];

//--input---
for(int i=0; i<2; i++){
puts("enter id: ");
scanf("%d",&csc202[i].id);
fflush(stdin);
puts("enter firstname: ");
scanf("%s",csc202[i].studentname.firstname);
fflush(stdin);
puts("enter lastname: ");
scanf("%s",csc202[i].studentname.lastname);
fflush(stdin);
}

//---output---
for(int i=0; i<2; i++){
printf("id: %d\nfirstname: %s\nlastname: %s\n",
csc202[i].id,csc202[i].studentname.firstname,
csc202[i].studentname.lastname);
}

}

CSC202: File Processing

2010-03-31T13:35:00.002+08:00

//BASIC
#include "stdio.h"

void main()
{
int number;

//-----Create a write to file----
FILE *f = fopen("D:\\test.txt","w");//w write, a append, r read

puts("enter number (ctrl z to end):");
scanf("%d",&number);

while(!feof(stdin)){
fprintf(f,"%d\n",number);
puts("enter number (ctrl z to end):");
scanf("%d",&number);
}

fclose(f);

//-----Read from a file----
f = fopen("D:\\test.txt","r");//w write, a append, r read
fscanf(f,"%d",&number);

while(!feof(f)){
printf("%d\n",number);
fscanf(f,"%d",&number);
}

fclose(f);

}

//Complete version
#include "stdio.h"

typedef struct student{
int id;
char name[64];
}STUDENT;

void main()
{
STUDENT csc202;

//-----Create a write to file----
FILE *f = fopen("D:\\student.txt","w");//w write, a append, r read

puts("enter student id (ctrl z to end):");
scanf("%d",&csc202.id);

while(!feof(stdin)){
puts("enter student first name:");
scanf("%s",csc202.name);

fprintf(f,"%d %s\n",csc202.id,csc202.name);

puts("enter student id (ctrl z to end):");
scanf("%id",&csc202.id);
}

fclose(f);

//-----Read from a file----
f = fopen("D:\\student.txt","r");//w write, a append, r read
fscanf(f,"%d %s",&csc202.id,csc202.name);

while(!feof(f)){
printf("%d %s\n",csc202.id,csc202.name);
fscanf(f,"%d %s",&csc202.id,csc202.name);
}
fclose(f);

}

OpenCV Biofeedback

2010-03-23T23:44:00.003+08:00

My latest project:

Webcam tracks breathing and displays graph in real time.

C++ CLR Programming

2010-03-23T23:06:00.004+08:00

Reference:

http://www.functionx.com/cppcli/index.htm

ENG4033M: How to Create Forms in DarkGDK

2010-02-19T23:06:00.002+08:00

See http://forum.thegamecreators.com/?m=forum_view&t=166159&b=22

for explanation

CSC202: Exercise on Functions 2

2010-02-04T14:20:00.010+08:00

1. Create the following function to randomly generate numbers from
1 to 100:

generateNumber().

The function will return an integer from 1 to 100.

The program will then ask you to guess a number.
If the number is equal to the generated number, it will print message:

"Congratulations"

If the number is less than the generated number will print message:

"Too Low. Please guess again another number."

If the number is greater than the generated number it will print message:

"Too High. Please guess another number."

The objective is to use as few guesses as possible to get the right number.

Hint:

use: #include "stdlib.h" and rand() function

For example:

#include "stdlib.h"
#include "time.h"

void main()
{
srand(time(NULL));
int n = 1 + rand( )%10 //will generate number
//from 1 to 10
}

SOLUTION:

TEXT VERSION:

Add me (Healer Omega) to Facebook

CSC202 : Exercise on Functions

2010-02-03T12:18:00.004+08:00

1. Write a program to input two numbers and print the sum,
product and difference of the two numbers.

2. Rewrite your program in Q. 1 above in modular form.

Solution for Q. 2:

#include "stdio.h"

//---- Function Prototypes -----
int add(int s, int t);
int multiply(int s, int t);
int diff(int s, int t);

void main()
{
int a, b, sum, product, difference;
printf("enter 2 integers: ");
scanf("%d%d",&a,&b);

sum = add(a, b);
product = multiply(a,b);
difference = diff(a,b);

printf("sum = %d\nproduct= %d\ndifference = %d\n",sum,product,difference);
}

//----- Function Definitions -----
int add(int s, int t)
{
int total;
total = s + t;
return total;
}

int multiply(int s, int t)
{
return s*t;
}

int diff(int s, int t)
{
return s - t;
}

ENG4033M: Remote Control Programming

2010-01-29T16:57:00.002+08:00

CSC202 : Exercise 4

2010-01-28T14:22:00.006+08:00

1. A salesman gets basic pay $200 per month + commission.
The commission is based on the following formula.
For the first $1000 sales made, the commission is 10% sales.
For the remaining sales above $1000, the commission is 20% of the sales.

For example, if a salesman sale for the month is $3000, then his salary is:

200 + (10% x 1000) + (20% x 2000)
= 200 + 100 + 400
= 700

SOLUTION:

2. Write a program that can find all prime numbers from 2 to 1000.
Example of the first eight prime numbers:

2,3,5,7,11,13,17,23...

SOLUTION:

CSC202 & ENG4033M : Logical Operators

2010-01-27T13:51:00.001+08:00

CSC202 & ENG4033M : Beginning WIN32 API

2010-01-22T16:51:00.004+08:00

//main.cpp
#include "app.h"

void main()
{
SayHello();
}

//app.cpp
#include "windows.h"
void SayHello()
{
MessageBox(0,"Hi there","Titles",MB_OK);
}

//app.h
void SayHello();

CSC202 & ENG4033M : File Processing

2010-01-22T16:15:00.002+08:00

//File Processing
#include "stdio.h"
void main()
{
char s[] = "avatar";

FILE *f;
f = fopen("D:\\data.txt","w");//w for overwrite
if(!f) return;
fprintf(f,"%s",s);
fclose(f);

f = fopen("D:\\data.txt","r");
if(!f) return;
char t[64];
fscanf(f,"%s",t);
fclose(f);

printf("Read: %s",t);
}

CSC202 & ENG4033M : Comparing Strings

2010-01-22T15:53:00.001+08:00

//Comparing Strings
#include "stdio.h"
#include "string.h"
void main()
{
char name[32];
scanf("%s",name);

if(strcmp(name,"bill")==0){
printf("Hello Bill Gates\n");
}else{
printf("Hello %s\n",name);
}
}

CSC202 & ENG4033M : 2D- Array

2010-01-22T15:36:00.001+08:00

CSC202 & ENG4033M : Passing Arrays to Functions

2010-01-22T15:24:00.000+08:00

CSC202 & ENG4033M : Arrays

2010-01-22T14:59:00.002+08:00

CSC202 & ENG4033M : Function call by reference

2010-01-22T14:48:00.001+08:00

//Function Call-By-Reference
#include "stdio.h"
//Function Prototype (Declaration)
void doubleIt(int* n);

int main()
{
//Function Call
int b = 2;
doubleIt(&b);
printf("result = %d\n",b);
return 0;
}

void doubleIt(int* n) //pointer
{
*n = (*n)*2;
}

CSC 202: Exercise 3

2010-01-21T14:02:00.004+08:00

1. Write a program that inputs a number and prints a square
eg. if user enters 5, it will print:

2. Modify the program above so that it will print a hollow square
instead, eg. if user enters 5, it will print:

SOLUTION:

CSC202: Tutorial Answers

2010-01-20T13:38:00.002+08:00

CSC202 : Test 1 Answers

2010-01-20T12:59:00.002+08:00

CSC202 & ENG4033M : Functions

2010-01-15T16:45:00.001+08:00

/*Modular Program*/
#include "stdio.h"
void sayHello(); //Function Prototype (Declaration)
int doubleIt(int n);

int main()
{
sayHello(); //Function Call
int n = doubleIt(2);
printf("result = %d\n",n);
return 0;
}

int doubleIt(int n)
{
return n*2;
}
void sayHello() //Function Definition
{
printf("Hello\n");
}

CSC202 & ENG4033M : Switch

2010-01-15T15:36:00.001+08:00

/*Switch */
#include "stdio.h"
int main()
{
int i;

printf("enter a integer: ");
scanf("%d",&i);

switch(i){
case 0:
printf("zero\n");
break;
case 1:
printf("one\n");
break;
case 2:
printf("two\n");
break;
case 3:
printf("three\n");
break;
default:
printf("other number\n");
break;
}

return 0;
}

/*else if */
#include "stdio.h"
int main()
{
int i;

printf("enter a integer: ");
scanf("%d",&i);

if(i==0) printf("zero\n");
else if(i==1) printf("one\n");
else if(i==2) printf("two\n");
else if(i==3) printf("three\n");
else printf("other number\n");

return 0;
}

CSC202 & ENG4033M : Loops

2010-01-15T14:55:00.006+08:00

/*Counter Controlled Repetition */
#include "stdio.h"
int main()
{
int a = 10;
while(a > 0){
printf("%d\n",a);
a = a - 1;
}
return 0;
}

/*Sentinel Controlled Repetition */
#include "stdio.h"
int main()
{
int a = 0;

while(1){
printf("%d\n",a);
scanf("%d",&a);
if(a==-1) break;
}
return 0;
}

DO - WHILE Loops:

CSC202 & ENG4033M: Exercise 2

2010-01-14T14:34:00.002+08:00

1. Write a program to input three integers. Then,
print out the total and average.

2. Write a program to input an integer.
If the number is odd, print "Odd Number",
else, print "Even Number".

3. Write a program to input age.

If age is equal to or larger than 16,
print the message "You can party",
else print "Sorry, you cannot party".

If age is larger than 18,
print the message "You can drive a car",
else print "Sorry you cannot drive a car".

CSC202 & ENG4033M : Exercise 1

2010-01-13T13:32:00.003+08:00

Write a program to input 3 integers.
Then print the largest and the smallest.

Solution:

A variation to input 10 integers:

CSC202 & ENG4033M : If - Else Statements & Relational-Equality Operators

2010-01-13T12:26:00.005+08:00

Text Version:

/* if statements */
#include "stdio.h"
int main()
{
int a=10, b=3, c=3;
if(b==3){
printf("equals\n");
}
if(a>b){
printf("bigger than\n");
}
if(c=c){
printf("bigger than or equal to\n");
}
if(b<=c){ printf("smaller than or equal to\n"); } return 0; } Another way to write it:

Note also the operator !=
which means NOT EQUAL TO

IF-ELSE example:

CSC202 & ENG4033M : Arithmetic Operators

2010-01-13T12:17:00.002+08:00

Text Version:

/* Arithmetic Operators */
#include "stdio.h"

int main()
{
int a=10, b=3, c=4;

printf("%d\n", a%b);
printf("%d\n", a/b);
printf("%d\n", a*b);
printf("%d\n", a + b);
printf("%d\n", a - b);
printf("%d\n", (a-b)/c);

return 0;
}

FLOATING POINT VERSION:

CSC 202: Programming Assignments

2010-01-11T11:08:00.001+08:00

Propose your own Title.

1. Introduction (Written)
Explain what you want to build
(One Paragraph)
(10 marks)

2. Design (Written)
Explain the design of your program.
(1 page)
(20 marks)

3. Write the program (Written)
The actual complete source code.
(1 page or more)
(25 marks)

4. Demonstration of the Program (Oral)
Give a presentation
(Live 5 mins or more)
(20 marks)

5. Explanation (Written)
(1 page or more)
(20 marks)

6. Summary(Written)
(1 paragraph or more)
(5 marks)

After completing the Assignment, please print a Report
consisting of the above parts and submit for marking.
The actual deadline will be announced later. The deadline
will about 2 weeks before end of semester.

CSC 202: Tutorial and Test 1 Dates

2010-01-11T10:25:00.002+08:00

Tutorial (Open Book): Jan 18 at 10.15 am - 11.45 am (Monday)
Test 1 (Closed Book): Jan 20 at 12.15 noon - 1.45 pm (Wednesday)

CSC202 & ENG4033M : Entering Characters

2010-01-08T16:48:00.000+08:00

/* entering characters */
#include "stdio.h"
int main()
{
char a, b, c;
scanf("%c%c%c",&a,&b,&c);
printf("%c %c %c\n",a,b,c);

return 0;
}

CSC202 & ENG4033M : A program to input and add 2 numbers

2010-01-08T16:35:00.005+08:00

Text Version:

/* A program to add 2 numbers */
#include "stdio.h"
int main()
{
int a,b,c;
printf("Enter first number: ");
scanf("%d",&a);

printf("Enter second number: ");
scanf("%d",&b);

c = a + b;
printf("%d + %d = %d\n",a,b,c);
return 0;
}

A variation (using only one scanf):

/* A program to add 2 numbers */
#include "stdio.h"
int main()
{
int a,b,c;
printf("Enter two numbers: ");
scanf("%d%d",&a,&b);

c = a + b;
printf("%d + %d = %d\n",a,b,c);
return 0;
}

ENG4033M: How to open CHM files in Vista/Windows 7

2010-01-07T23:20:00.002+08:00

One of my students, Khaw Jun Cong found a solution to the problem of
opening chm files in Vista/Windows 7:

I have just found out how to open it correctly in the internet. It seems like due to the security "feature" in our OS. It can be view after right click on the file and choose "properties" and at the bottom of the properties there is an unblock word, choose unblock and it can be view after pressing the "apply" button, here is a link which help me solve this problem.http://www.west-wind.com/weblog/posts/581253.aspx

Thanks to Jun Cong for sharing!

CSC202 & ENG4033M: Hello World Program

2010-01-06T12:48:00.010+08:00

How To Write a Hello World program

1. Create a New Project called HelloWorld.

2. Right-click the Source File folder.

3. You will see a Context Menu (Pop-Up Menu).
Click on Add\New Item...

4. You will see a Add New Item dialog box.
Select Code\C++File(.cpp)
Give a name to the file, eg. main, then click Add button

At this point, you should see the following:

Type in the source code as shown outlined in red below:

Text format
(just copy and paste into your Visual C++ 2008):

#include "stdio.h"

int main()
{
printf("Hello World\n");
return 0;
}

5. Then, to build your program.
From the Menu Bar, select Build\Build Solution.
In the Output window at the bottom of the screen,
if you see any error, click on the error message
to go to the line which contains the error.

Correct the error, corrected line should be:

printf("Hello World\n");

then Build again.

6. Once you have successfully built the program, you can Test it.
From the Menu Bar, select either Debug\Start Debugging OR,
select Debug\Start Without Debugging.

Program output:

CSC202 & ENG4033M: How to Use Visual C++ 2008

2010-01-06T12:17:00.003+08:00

How to Start a New Project in Visual C++ 2008

1. Start a New Project by clicking
File\New\Project...

2. You will see the New Project dialog box.
Select Win32\Win32ConsoleApplication
The default Folder is
...MyDocuments\Visual Studio 2008\
Create a new Folder called CSC202 in the
above parent Folder, eg:
...MyDocuments\Visual Studio 2008\CSC202

Give a name to the Project, eg
HelloWorld, then click OK.

3. You will then see Welcome to the
Win32 Application Wizard dialog box.
Just click Next.

4. You will then see Application Settings
dialog box. Under Additional Options,
click on Empty Project radio checkbox, then
click Finish button.

You should see the below at this point:

Netbeans: Enabling Assertions

2009-12-09T10:43:00.002+08:00

Make the changes in red as above.

How to compile standalone exe from Matlab

2009-10-24T23:48:00.003+08:00

http://www.onecore.net/howtocreate-standalone-executable-for-matlab-file.htm

http://www.mathworks.com/support/compilers/R2009b/

mbuild -setup

mcc -m graph.m  -o graph


Do not name output file as graph.exe
it will automatically append .exe

Don't hold your breath, it takes a long time
to compile.

Connecting WebCam to Matlab

2009-10-24T11:17:00.004+08:00

http://www.edaboard.com/ftopic325427.html

% Create video input object.
vid = videoinput('winvideo')
% Set video input object properties for this application.
% Note that example uses both SET method and dot notation method.
set(vid,'TriggerRepeat',Inf);
vid.FrameGrabInterval = 5;
% Set value of a video source object property.
vid_src = getselectedsource(vid);
set(vid_src,'Tag','motion detection setup');
% Create a figure window.
figure;
% Start acquiring frames.
start(vid)
% Calculate difference image and display it.
while(vid.FramesAcquired<=100) % Stop after 100 frames data = getdata(vid,2);
diff_im = imadd(data(:,:,:,1),-data(:,:,:,2));
imshow(diff_im);
end
stop(vid)

http://madan.wordpress.com/2007/03/23/image-capture-using-webcam-in-matlab/

Intro to Game Programming Using Flash

2009-10-20T16:59:00.003+08:00

http://www.dezinerfolio.com/2008/02/06/20-free-tutorials-to-create-your-own-flash-game

http://www.rnel.net/tutorials/Flash/Games

My Flash Games

FileInputStream : how to read text files

2009-10-05T11:02:00.002+08:00

FileInputStream can be used to read text files as well:

class TestFile{
public TestFile(){
FileInputStream in = null;
StringBuilder sb = new StringBuilder();
int x = 0;
try{
in = new FileInputStream("test2.txt");
while((x = in.read()) != -1){
sb.append((char)x);
}
in.close();
System.out.println(sb.toString());
}catch(Exception e){
System.out.println(e.toString());
}
}
}

SCJP Jar

2009-09-16T16:54:00.001+08:00

http://paulmcpd.blogspot.com/2009/02/java-classpath.html

http://paulmcpd.blogspot.com/2009/02/another-jar-example.html

http://paulmcpd.blogspot.com/2009/09/scjp-errata.html

SCJP Example of Implementing Comparable Interface and Iterator

2009-09-13T13:03:00.003+08:00

JavaFX

2009-09-12T10:25:00.002+08:00

http://javafx.com/samples/

Java SCJP: How to do reverseOrder

2009-09-11T15:37:00.003+08:00

import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.ArrayList;

Java For Profit

2009-09-11T00:27:00.001+08:00

www.topcoder.com

www.rentacoder.com

www.getafreelancer.com

SCJP Errata

2009-09-05T15:44:00.003+08:00

Quiz A of LearnKey

Useful commands:

javac -source 1.4 MusicPlayer.java

Below is from Kathy Sierra's book for SCJP 6, page314:

Maps : How to get EntrySet

2009-09-03T16:19:00.002+08:00

Below is an example of how to use Map.EntrySet

class MapTest{
private Map m = new HashMap();
public MapTest(){
m.put("a",1);
m.put("b",2);
m.put("c",3);
}

public void outputMap(){
for(Map.Entry e : m.entrySet()){
System.out.println(e.getKey() + " " + e.getValue());
}
}
}

call it from public static void main as follows:

new MapTest( ).outputMap( )

SCJP Mock Exams & Others

2009-08-31T21:50:00.003+08:00

http://scjptest.com/

http://faq.javaranch.com/java/ScjpMockTests

http://www.examlab.tk/

Retake Procedure

http://malaysia.sun.com/training/

MySQL: How to Join Multiple Tables

2009-07-23T17:12:00.008+08:00

How to join 3 tables: student, ssession, ssubject

student:

ssession:

ssubject:

SQL query to join all 3 tables above:

SELECT student.name,ssession.sem,student.id,ssubject.grade,ssubject.total,
ssubject.exam,ssubject.cwtotal FROM student
INNER JOIN ssession
ON student.studentid = ssession.studentid
INNER JOIN ssubject
ON ssession.sessionid=ssubject.sessionid
WHERE ssession.session='JAN 2009'
AND ssubject.code='ACC1101';

produces this:

The basic syntax for multiple inner joins:

SELECT fields... FROM firstTable
INNER JOIN secondTable
ON firstTable.primaryKey=secondTable.foreignKey
INNER JOIN thirdTable
ON secondTable.primaryKey=thirdTable.foreignKey
WHERE conditions...

The SELECT fields... can be from any of the 3 tables being joined!

Note:
For Delete DO NOT use INNER JOIN.
You should use LEFT JOIN. Left join will delete the rows
even if table 2 and/or 3 has no corresponding row.
Inner join will fail to delete unless all three tables are
successfully joined.

MySQL: How to edit Group Properties for iReport

2009-07-22T13:52:00.003+08:00

I'm using Netbeans 6.5 with iReport Plugins.
Below is how to access the Group Properties:

The steps:

1. Click on the Group Header.
2. Click on the Properties Panel on the right.