Logic Design of 8-bit arithmetic microprocessor : an assignment on CAD

Logic Design of 8-Bit Arithmetic Microprocessor

BlueChess : Two Player Chess Game in J2ME, My minor project @ IOE

Here is the download link for BlueChess : Two Player Chess Game

http://www.4shared.com/file/JWiI8Cce/BlueChess_Bluetooth_two_player.html

XML parsing using SaxParser with complete code

SAX parser use callback function (org.xml.sax.helpers.DefaultHandler) to informs clients of the XML document structure. You should extend DefaultHandler and override few methods to achieve xml parsing.
The methods to override are

• startDocument() and endDocument() – Method called at the start and end of an XML document. 
• startElement() and endElement() – Method called at the start and end of a document element.  
• characters() – Method called with the text contents in between the start and end tags of an XML document element.

The following example demonstrates the uses of DefaultHandler to parse and XML document. It performs mapping of xml to model class and generate list of objects.

Android hide soft keyboard code

Working code for hiding the soft keyboard in Android :

getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);

This can be used to suppress the keyboard until the user actually touched the edittext view.

Java-Open/Launching any file with its default handler with start utility in windows

Java-Open/Launching any file with its default handler with start utility in windows

String cmd = "cmd.exe /c start ";
String file = "c:\\version.txt";
Runtime.getRuntime().exec(cmd + file); 

Android Code: Latitude and Longitude of the mobiledevice

We should use the LocationManager.

LocationManager lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE); Location location = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
double longitude = location.getLongitude();
double latitude = location.getLatitude();

The call to getLastKnownLocation() doesn't block - which means it will return null if no position is currently available - so you probably want to have a look at passing a LocationListener to therequestLocationUpdates() method instead, which will give you asynchronous updates of your location.

private final LocationListener locationListener = new LocationListener() {
    public void onLocationChanged(Location location) {
        longitude = location.getLongitude();
        latitude = location.getLatitude();
    }
}

lm.requestLocationUpdates(LocationManager.GPS, 2000, 10, locationListener);

Required Permission :

You'll need to give your application the ACCESS_FINE_LOCATION permission if you want to use GPS.

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

You may also want to add the ACCESS_COARSE_LOCATION permission for when GPS isn't available and select your location provider with the getBestProvider() method.

My first Android project in Eclipse: Multiplication Table Generator App using TextWatcher and OnClickListener

After removing the configuration errors that came during running the auto generated Hello World project, I decided to write a Multiplication Table Generator App on Android platform. This is my first android app other than HelloWorld. In this article, I am going to explain how I created the App. It describes the use of TextWatcher and OnClickListener interfaces for event handling.

Multiplication Table Generator contains the EditText-ipNumberTxt component for reading user input – a number. It contains two Buttons '+' and '–' to increment/decrement the number in EditText. The generated output is displayed in TextView-outputTXT. The multiplication table is generated on afterTextChanged event of EditText field.

The download link for complete project is given at end of article.

Error Free Android Hello World Project on Eclipse

Removal of two common errors that may arise when running the android project on eclipse.
[ PANIC: Could not open: C:\Users\gTiwari\.android/avd/MyAndAVD.ini ]
and
[ invalid command-line parameter: Files ]

---

Today I tried to setup the essentials and test a demo project on Eclipse.I installed required tools (Android SDK, ADT, etc) and created a empty project successfully.

I was following these articles :
Installing Android SDK and ADT in eclipse.
Android First HelloWorld App in Eclipse.
But I  got the few errors when I tried run the Hello World project that eclipse created for me.

In this Blog, I am  describing the errors and how I solved them that may be useful for Android beginners like you.

[My System Details : Windows 7(64-bit). Eclipse 3.7 (Indigo).The MyFirstEmul is the name of emulator I created.]

Error #1
When i created a hello world project and tried to run it. I got the following error.
[2011-08-27 18:05:22 - Emulator] PANIC: Could not open: C:\Users\gTiwari\.android/avd/MyAndAVD.ini
Cause : 
The emulator could not found in location "C:\Users\gTiwari\". I searched over my HDD for the emulator I created earlier. And I found it in the  E:\ .android folder. This might be due to I had moved my system folders such as Documents, Desktop, Downloads to E:\.
Solution :
I simply moved the E:\.android folder to C:\Users\gTiwari\ and solved it.

Error #2
After I solved the Error #1, and tried to run the project, I got the following error :
[2011-08-27 18:24:39 - Emulator] invalid command-line parameter: Files.
[2011-08-27 18:24:39 - Emulator] Hint: use '@foo' to launch a virtual device named 'foo'.
[2011-08-27 18:24:39 - Emulator] please use -help for more information
Cause : 
The default installation location is: C:\Programme Files(x86)\Android\android-sdk.  But the  SDK location cannot contain any spaces.
Solution : 
Should I reinstall the Android SDK to new location with no space in folder names ?
Well, that may be a solution. But i found easy solution for this.
I make use of mklink command line utility of NTFS in Windows 7 (in previous versions of the command may be different). I pointed C:\AndroidSDK to the actual C:\Program Files (x86)\Android\android-sdk by using following command.
     MKLINK  /J  C:\AndroidSDK "C:\Program Files (x86)\Android\android-sdk\"
This command created special junction folder C:\AndroidSDK helped me in  redirection.

And I configured this new path(C:\AndroidSDK) to AndroidSDK in Eclipse IDE settings - from
                      Windows -> Preferences -> Android
And run the Hello World project successfully.

See my other posts on  android from : http://ganeshtiwaridotcomdotnp.blogspot.com/search/label/Android 

android get current screen orientation

The current configuration ( orientation as well) can be available from the Resources' Configuration object as:
The return parameter may be one of ORIENTATION_LANDSCAPE, ORIENTATION_PORTRAIT, or ORIENTATION_SQUARE.

public static int getScreenOrientation(){    
    return getResources().getConfiguration().orientation;
}

check http://developer.android.com/reference/android/content/res/Configuration.html#orientation for details

java android write to sd card

You can access to sd card by File sdCard = Environment.getExternalStorageDirectory();

Note : Hard coding the /sdcard/ folder is not good.

Write to sd card

File sdCard = Environment.getExternalStorageDirectory();
File dir = new File (sdcard.getAbsolutePath() + "/dir1/dir2");
dir.mkdirs();
File file = new File(dir, "filename");
FileOutputStream f = new FileOutputStream(file);
...

And read/write to file   by using FileOutputStream f .