I have written a LWUIT application that involves two RecordStores recordStore and
recordStore2.
Two methods method getRecordData for retrieving all records of recordStore, method getRecordData2 for retrieving all records of recordStore2. Two Radiobuttons rb and rb2 are added 'ButtonGroup' called group A.TextField called 'tf'.
Additionally, a button for adding a record for either recordstore or recordstore2 after rb or rb2 is selected; text which must written into tf TextField as a record
Two lists mylist and mylist2:
mylistto display all records ofrecordstoremylist2to display all records ofrecordstore2
All button to display all records of recordstore and recordstore2
Simple problem faces me:
After I exit from the application return back to it and press All button mylist and mylist2 are null (No record displayed)!
Example code:
import java.util.*;
import com.sun.lwuit.table.*;
import com.sun.lwuit.table.DefaultTableModel;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
import javax.microedition.rms.RecordStore;
import javax.microedition.rms.RecordStoreNotOpenException;
import javax.microedition.rms .*;
import com.sun.lwuit.layouts.*;
import com.sun.lwuit.*;
import javax.microedition.lcdui.Canvas;
import com.sun.lwuit.events.*;
import com.sun.lwuit.plaf.*;
import javax.microedition.midlet.*;
import com.sun.lwuit.geom.*;
import com.sun.lwuit.*;
import com.sun.lwuit.events.*;
public class HelloLWUITMidlet3 extends MIDlet implements Runnable, ActionListener {
private RecordStore recordStore,recordStore2;
String team,team2;
public String [] getRecordData()
{
String[] str = null;
int counter = 0;
try
{
RecordEnumeration enumeration = recordStore.enumerateRecords(null, null, false);
str = new String[recordStore.getNumRecords()];
while(enumeration.hasNextElement())
{
try
{
str[counter] = (new String(enumeration.nextRecord()));
counter ++;
}
catch (Exception e)
{
e.printStackTrace();
}
}
} catch (Exception e) {
e.printStackTrace();
}
return str;
}
public String [] getRecordData2()
{
String[] str = null;
int counter = 0;
try
{
RecordEnumeration enumeration = recordStore2.enumerateRecords(null, null, false);
str = new String[recordStore2.getNumRecords()];
while(enumeration.hasNextElement())
{
try
{
str[counter] = (new String(enumeration.nextRecord()));
counter ++;
}
catch (Exception e)
{
e.printStackTrace();
}
}
} catch (Exception e) {
e.printStackTrace();
}
return str;
}
public void startApp()
{
com.sun.lwuit.Display.init(this);
int bgColor =0x0066CC;
final ButtonGroup group = new ButtonGroup();
final RadioButton rb = new RadioButton("First Team");
final RadioButton rb2 = new RadioButton("Second Team");
group.add(rb);
group.add(rb2);
//TableModel model = new DefaultTableModel(new String[]{"Column 1", "Column 2"});
final f1 g = new f1();
final com.sun.lwuit.List mylist = new com.sun.lwuit.List();
final com.sun.lwuit.List mylist2 = new com.sun.lwuit.List();
final form6 my = new form6();
final com.sun.lwuit.Form f = new com.sun.lwuit.Form("Football");
f.getStyle().setBgColor(0X99CCFF);
BoxLayout boxlayout =new BoxLayout(BoxLayout.X_AXIS);
// com.sun.lwuit.Command exitCommand = new com.sun.lwuit.Command("????");
final Button goals = new Button("See goals");
final Button button = new Button("Goals Record");
final com.sun.lwuit.TextField tf =new com.sun.lwuit.TextField();
final com.sun.lwuit.TextField txtfield5 =new com.sun.lwuit.TextField();
final com.sun.lwuit.TextField txtfield6 =new com.sun.lwuit.TextField();
final Button addition = new Button("Add Goals");
final Button All = new Button("All Goals");
addition.getStyle().setBgColor(0X0066CC);
com.sun.lwuit.Command back = new com.sun.lwuit.Command("Main_Screen");
final form6 ff = new form6();
button.getStyle().setBgColor(0X0066CC);
goals.getStyle().setBgColor(0X0066CC);
All.getStyle().setBgColor(0X0066CC);
Style g_style5 = g.getSelectedStyle() ;
f.addComponent(button);
ff.addCommand(back);
//g.addComponent(main_screen);
g.addComponent(tf);
g.addComponent(addition);
g.addComponent(rb);
g.addComponent(rb2);
g.addComponent(All);
g.getStyle().setBgColor(0X99CCFF);
g.addCommand(back);
g.addCommandListener(new ActionListener()
{
public void actionPerformed(ActionEvent ae) {
f.show();
}
}
);
ff.addCommandListener(new ActionListener()
{
public void actionPerformed(ActionEvent ae) {
f.show();
}
}
);
ff.getStyle().setBgColor(0X99CCFF);
try{
recordStore2 = RecordStore.openRecordStore("My Record Store2", true);
}
catch(Exception ex)
{ }
try
{
recordStore = RecordStore.openRecordStore("My Record Store", true);
}
catch(Exception ex)
{ }
All.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
try
{
com.sun.lwuit.Label l = new com.sun.lwuit.Label("First Team Goals") ;
ff.addComponent(l);
String [] record= getRecordData();
int j1;
String valueToBeInserted2="";
for( j1=0;j1< getRecordData().length;j1++)
{
valueToBeInserted2=valueToBeInserted2 + " " + record[j1];
if(j1==getRecordData().length)
{
mylist.addItem(record[j1]);
}
}
ff.addComponent(mylist);
com.sun.lwuit.Label ll = new com.sun.lwuit.Label("Second Team Goals") ;
ff.addComponent(ll);
String [] record2= getRecordData2();
int j2;
String valueToBeInserted="";
for( j1=0;j1< getRecordData().length;j1++)
{
valueToBeInserted2=valueToBeInserted2 + " " + record[j1];
if(j1==getRecordData().length)
{
mylist.addItem(record[j1]);
}
}
ff.addComponent(mylist2);
}
catch(java.lang.IllegalArgumentException e){}
finally {
ff.show();
}
}
}
);
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
g.show();
}
}
);
goals.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
}
}
);
final Thread th = new Thread(this);
addition.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent ae) {
String s =tf.getText();
if(rb.isSelected())
{
if(s!=null && s.length() > 0)
{
try{
String kk =tf.getText();
mylist.addItem(kk);
byte bytestream[] = kk.getBytes() ;
int i = recordStore.addRecord(bytestream, 0, bytestream.length);
}
catch(Exception ex) { }
Dialog validDialog = new Dialog(" ");
Style Dialogstyle = validDialog.getSelectedStyle() ;
validDialog.setScrollable(false);
validDialog.getDialogStyle().setBgColor(0x0066CC);
validDialog.setTimeout(1000); // set timeout milliseconds
TextArea textArea = new TextArea("...."); //pass the alert text here
textArea.setFocusable(false);
textArea.setText("A new goal has been added"+"" );
validDialog.addComponent(textArea);
validDialog.show(0, 10, 10, 10, true);
}
}
else if (rb2.isSelected())
{
if(s!=null && s.length() > 0)
{
try{
String kk =tf.getText();
mylist2.addItem(kk);
byte bytestream[] = kk.getBytes() ;
int i = recordStore2.addRecord(bytestream, 0, bytestream.length);
}
catch(Exception ex) { }
Dialog validDialog = new Dialog(" ");
Style Dialogstyle = validDialog.getSelectedStyle() ;
validDialog.setScrollable(false);
validDialog.getDialogStyle().setBgColor(0x0066CC);
validDialog.setTimeout(1000); // set timeout milliseconds
TextArea textArea = new TextArea("...."); //pass the al newert text here
textArea.setFocusable(false);
textArea.setText("A new Goal has been added"+"" );
validDialog.addComponent(textArea);
validDialog.show(0, 10, 10, 10, true);
}
}
else if((rb.isSelected()==false&&rb.isSelected()==false)||(s==null && s.length()<= 0))
{
Dialog validDialo = new Dialog(" ");
validDialo.setScrollable(false);
validDialo.getDialogStyle().setBgColor(0x0066CC);
validDialo.setTimeout(5000); // set timeout milliseconds
TextArea textArea = new TextArea("...."); //pass the alert text here
textArea.setFocusable(false);
textArea.setText("please enter scorer name and choose his team");
validDialo.addComponent(textArea);
//validDialo.getStyle().set3DText(true, true);
validDialo.show(50, 50, 50, 50, true);
txtfield6.clear();
}
}
}
);
f.show();
}
public void run ()
{
while(true)
{
String get[] = getRecordData();
Dialog validDialog = new Dialog(" ");
Style Dialogstyle = validDialog.getSelectedStyle() ;
validDialog.setTimeout(5000);
validDialog.setScrollable(true);
validDialog.setLayout(null);
validDialog.setTimeout(5000);
TextArea textArea = new TextArea( );
for(int ii=0;ii<getRecordData().length;ii++ )
{
textArea.setColumns(getRecordData().length);
validDialog.addComponent(textArea);
validDialog.show(10, 10, 10, 10, true);
System.out.println(get[ii]+"\n");
System.out.println(textArea.getColumns()+"\n");
}
}
}
public void pauseApp() {}
public void destroyApp(boolean unconditional) {}
public void actionPerformed(ActionEvent ae) {
notifyDestroyed();
}
public class f1 extends com.sun.lwuit.Form
{
com.sun.lwuit.TextField tf;
public f1()
{
com.sun.lwuit.Form f1 = new com.sun.lwuit.Form("Goals Records");
tf =new com.sun.lwuit.TextField();
}
}
public class form6 extends com.sun.lwuit.Form
{
com.sun.lwuit.TextField txtfield3;
com.sun.lwuit.TextField tf3;
public form6()
{
com.sun.lwuit.Form mylist = new com.sun.lwuit.Form("Goals List");
}
}
}
