ActiveAndroid – Dummys Guide to creating a jar

1. You MUST have installed:

• GIT installed (http://git-scm.com/downloads) OR  sudo apt-get install git
• Apache Ant (http://ant.apache.org/bindownload.cgi) OR  sudo apt-get install ant

2. Go to https://github.com/pardom/ActiveAndroid, and copy https://github.com/pardom/ActiveAndroid.git

3. Clone to ActiveAndroid git repository:

 

 

4, Change directory to ActiveAndroid and execute ant command (Ant takes in build.xml)

> ant

 

5.  Change directory to dist/ where ActiveAndroid.jar is created!

 

7. Thats it! ..Now you can import the ActiveAndroid.jar library to use with your Android Project!

 

Advanced Android UI – WheelPicker

Ever wanted Sleek-n-Sexy UI components like Apple’s iPhone/iPad?

Now you can with Android-Wheel – the sexy WheelPicker for Android:
Android-Wheel: http://code.google.com/p/android-wheel/
It comes with a handy ScrollListener for listen to touch events on the wheel component. Yah …..C-A-S-I-N-O!

Download: TestWheel.zip

Some Notes:

• Sometimes you need to adjust the wheel width..I know I had to do this to prevent text from overflowing ..and the wheels rolling off…I think WheelView.java is where it at!
• res/drawables – contains the styles/gradients etc.

The Application:

The Code:

import kankan.wheel.widget.ArrayWheelAdapter;
import kankan.wheel.widget.OnWheelChangedListener;
import kankan.wheel.widget.OnWheelScrollListener;
import kankan.wheel.widget.WheelView;
import android.app.Activity;
import android.os.Bundle;
import android.widget.EditText;
import android.widget.TextView;

public class Main extends Activity
{
// TODO: Externalize string-array
String wheelMenu1[] = new String[]{"Right Arm", "Left Arm", "R-Abdomen", "L-Abdomen", "Right Thigh", "Left Thigh"};
String wheelMenu2[] = new String[]{"Upper", "Middle", "Lower"};
String wheelMenu3[] = new String[]{"R", "L"};

// Wheel scrolled flag
private boolean wheelScrolled = false;

private TextView text;
private EditText text1;
private EditText text2;
private EditText text3;

@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.empty_layout);

initWheel1(R.id.p1);
initWheel2(R.id.p2);
initWheel3(R.id.p3);

text1 = (EditText) this.findViewById(R.id.r1);
text2 = (EditText) this.findViewById(R.id.r2);
text3 = (EditText) this.findViewById(R.id.r3);
text = (TextView) this.findViewById(R.id.result);
}

// Wheel scrolled listener
OnWheelScrollListener scrolledListener = new OnWheelScrollListener()
{
public void onScrollStarts(WheelView wheel)
{
wheelScrolled = true;
}

public void onScrollEnds(WheelView wheel)
{
wheelScrolled = false;
updateStatus();
}
};

// Wheel changed listener
private final OnWheelChangedListener changedListener = new OnWheelChangedListener()
{
public void onChanged(WheelView wheel, int oldValue, int newValue)
{
if (!wheelScrolled)
{
updateStatus();
}
}
};

/**
* Updates entered PIN status
*/
private void updateStatus()
{
text1.setText(wheelMenu1[getWheel(R.id.p1).getCurrentItem()]);
text2.setText(wheelMenu2[getWheel(R.id.p2).getCurrentItem()]);
text3.setText(wheelMenu3[getWheel(R.id.p3).getCurrentItem()]);

text.setText(wheelMenu1[getWheel(R.id.p1).getCurrentItem()] + " - " + wheelMenu2[getWheel(R.id.p2).getCurrentItem()] + " - " + wheelMenu3[getWheel(R.id.p3).getCurrentItem()]);
}

/**
* Initializes wheel
*
* @param id
*          the wheel widget Id
*/

private void initWheel1(int id)
{
WheelView wheel = (WheelView) findViewById(id);
wheel.setAdapter(new ArrayWheelAdapter(wheelMenu1));
wheel.setVisibleItems(2);
wheel.setCurrentItem(0);
wheel.addChangingListener(changedListener);
wheel.addScrollingListener(scrolledListener);
}

private void initWheel2(int id)
{
WheelView wheel = (WheelView) findViewById(id);
wheel.setAdapter(new ArrayWheelAdapter(wheelMenu2));
wheel.setVisibleItems(2);
wheel.setCurrentItem(0);
wheel.addChangingListener(changedListener);
wheel.addScrollingListener(scrolledListener);
}

private void initWheel3(int id)
{
WheelView wheel = (WheelView) findViewById(id);

wheel.setAdapter(new ArrayWheelAdapter(wheelMenu3));
wheel.setVisibleItems(2);
wheel.setCurrentItem(0);
wheel.addChangingListener(changedListener);
wheel.addScrollingListener(scrolledListener);
}

/**
* Returns wheel by Id
*
* @param id
*          the wheel Id
* @return the wheel with passed Id
*/
private WheelView getWheel(int id)
{
return (WheelView) findViewById(id);
}

/**
* Tests wheel value
*
* @param id
*          the wheel Id
* @param value
*          the value to test
* @return true if wheel value is equal to passed value
*/
private int getWheelValue(int id)
{
return getWheel(id).getCurrentItem();
}
}

Anatomy of an Android Project

Software projects ……mmmh ..have anatomy…yahhhh …sexy!

• Logical structure imposed due to the organization of code into packages.
• Structural organization of software code generally is a good practice makes things easier to find, but also maintainable over the long run as the project grows.
• Most importantly, knowing the project structure helps you track down program errors easilly!

Let’ take a look at the Project Structure generated by Eclipse ADT plug-in from our previous post:

Folder generated:

src/ –  Source folder contains all your Java source code

gen/ – Generated folder contains source code generated by Android/Eclipse.

• Well it only contains R.java – one of Android’s most important file to perform name lookup/resolution and referencing.
• R.java is automatically generated by the build system and references your resources.

assets/ – Assets folder contains static files such as html which can be included in your program.

res/ – Resource folder contains your program resource files.

res/drawables/ – Contains image files eg. PNG, JPG etc but also drawables which are specified in XML format

res/layouts/ – Contains XML files to specify your application View layouts

res/values/ – Contains XML files where you can specify static string,text, numeric and other constant values.

Referenced Libraries/ – A folder containing third-party/downloaded JAR libraries which can be used in your Android App.

AndroidManifest.xml – A manifest file where you can specify all you Activities, Permissions, and other configurations.

Hello world!

I am trying to get approval so I can release the entire source code for most of the apps and some other code,
which I never blogged about!

Regards,
Wagied – 2013