Week4: MM Midlet
Check tasks from form.
Code File
import javax.microedition.lcdui.*;
import javax.microedition.io.*;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
import java.io.*;
public class MainScreenMidlet extends MIDlet implements CommandListener,Runnable {
private Display display; // The display
private Form main;
private Form screensaver;// form for displaying the screensaver image
private ChoiceGroup worklist1;
private Command cmdExit;
private Command cmdSelect;
public Gauge showeff;//activity indicator for alert object: test
public int total;
public String url;
public MainScreenMidlet () {
// save reference to midlet so that we can exit application
display = Display.getDisplay(this);//gets ref to the display instance..
main = new Form("Work Time");
main.setCommandListener(this);
// create list to be displayed on the form
worklist1 = new ChoiceGroup("Select tasks Completed",Choice.MULTIPLE);
worklist1.append("Pay cheques", null);
worklist1.append("Switch class to Computational Form", null);
worklist1.append("Discussion for Connected Life", null);
worklist1.insert(1, "Submit Source code for MAD", null);
main.append(worklist1);
// create command objects so we can compare them later
cmdExit = new Command("Exit", Command.EXIT, 2);
cmdSelect = new Command("Select", Command.OK, 1);
main.addCommand(cmdSelect);
main.addCommand(cmdExit);
Alert welcome = new Alert("Welcome","Time to check your tasks, are you ready?", null, AlertType.INFO);
welcome.setTimeout(3000);
display.setCurrent(welcome,main);
//create form for displaying screensaver image
screensaver=new Form ("Generating...");
screensaver.addCommand(cmdExit);
screensaver.setCommandListener(this);
}
// call this function when you want to exit application
public void exitMIDlet()
{
try {
destroyApp(true);
} catch (MIDletStateChangeException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
notifyDestroyed();
}
// handle commands
public void commandAction(Command cmd, Displayable dis) {
if(cmd == cmdExit )
exitMIDlet();
else
{
total=worklist1.getSelectedFlags(new boolean[worklist1.size()]);
Alert test = new Alert("Selected "+total,"Tasks completed - "+total, null, AlertType.INFO);
Gauge showeff = new Gauge(null,false,100, 0);
test.setIndicator(showeff);
showeff.setValue(total);
//test.getIndicator();
test.setTimeout(3000);
display.setCurrent(test,screensaver);
Thread t = new Thread(this);//new execution thread for screen saver operation
t.start();
// bargraph should be an alert with guage, screensaver should be canvas
//app.getDisplay().setcurrent(bargraph, screensaver);
}
}
protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
// TODO Auto-generated method stub
}
protected void pauseApp() {
// TODO Auto-generated method stub
}
protected void startApp() throws MIDletStateChangeException {
// TODO Auto-generated method stub
}
//exectution of thread t;
public void run() {
HttpConnection hc = null;
DataInputStream in = null;
try {
String url;
if(total==1)
{
url= "http://www1.istockphoto.com/file_thumbview_approve/437828/2/istockphoto_437828_giant_smiley_big_smile.jpg";
}
else
{
url= "http://www.istockphoto.com/file_closeup/who/facial_expressions/smiling/3404377_unhappy_worker.php?id=3404377";
}
System.out.println("Starting to download smiley image");
hc = (HttpConnection) Connector.open(url);
int length = (int) hc.getLength();
byte[] data = null;
if (length != -1) {
System.out.println("Content Length is " + length);
data = new byte[length];
in = new DataInputStream(hc.openInputStream());
in.readFully(data);
}
else {
// If content length is not given, read in chunks.
int chunkSize = 512;
int index = 0;
int readLength = 0;
in = new DataInputStream(hc.openInputStream());
data = new byte[chunkSize];
do {
if (data.length < index + chunkSize) {
byte[] newData = new byte[index + chunkSize];
System.arraycopy(data, 0, newData, 0, data.length);
data = newData;
}
System.out.println(".");
readLength = in.read(data, index, chunkSize);
index += readLength;
} while (readLength == chunkSize);
length = index;
}
Image smileyscr = Image.createImage(data, 0, length);
ImageItem imageItem = new ImageItem(null, smileyscr, 0, null);
screensaver.append(imageItem);
screensaver.setTitle("Done.");
}
catch (Exception ioe) {
ioe.printStackTrace();
StringItem stringItem = new StringItem(null, ioe.toString());
screensaver.append(stringItem);
screensaver.setTitle("Done.");
}
finally {
try {
if (in != null)
in.close();
if (hc != null)
hc.close();
} catch (IOException ioe) {
}
}
}
}
posted by Vibha @ 4:01 PM
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