Categories: Java | Java ME | Code Examples | Files/Data

This page was last modified 01:28, 4 July 2008.

From Forum Nokia Wiki

import javax.microedition.rms.*;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import java.io.*;
public class ReadWriteRMS
        extends MIDlet implements CommandListener {
    private Display display;
    private Alert alert;
    private Form form;
    private Command exit;
    private Command start;
    private Command delete;
    
    
    private RecordStore recordstore,recordstore1,recordstore2,recordstore3,recordstore4,recordstore5 = null;
    RecordEnumeration recEnum;
    
    public ReadWriteRMS() {
        display = Display.getDisplay(this);
        exit = new Command("Exit", Command.EXIT, 1);
        start = new Command("Start", Command.SCREEN, 1);
        delete = new Command("Delete",Command.SCREEN,2);
        form = new Form("Mixed Record");
        form.addCommand(exit);
        form.addCommand(start);
        form.addCommand(delete);
        
        form.setCommandListener(this);
    }
    public void startApp() {
        display.setCurrent(form);
    }
    public void pauseApp() {
    }
    public void destroyApp( boolean unconditional ) {
    }
    public void commandAction(Command command, Displayable displayable) {
        if (command == exit) {
            destroyApp(true);
            notifyDestroyed();
        } else if (command == start) {
            try {
                
                recordstore = RecordStore.openRecordStore("myRecordStore", true );
                recordstore1 = RecordStore.openRecordStore("1myRecordStore", true );
                recordstore2 = RecordStore.openRecordStore("2myRecordStore", true );
                recordstore3 = RecordStore.openRecordStore("3myRecordStore", true );
                
                
            } catch (Exception error) {
                error.printStackTrace();
                alert = new Alert("Error Creating", error.toString(), null, AlertType.WARNING);
                alert.setTimeout(Alert.FOREVER);
                display.setCurrent(alert);
            }
            try {
                byte[] outputRecord;
                
                
                String outputString[] = {"senthil","kumar","k","sri","vas","k"};
                int outputInteger[] = {25,21,20,23,34,34};
                boolean outputBoolean[] = {true,false,true,true,false,true};
                
                ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
                DataOutputStream outputDataStream = new DataOutputStream(outputStream);
                
                for(int i=0; i<outputString.length;i++) {
                    outputDataStream.writeUTF(outputString[i]);
                    outputDataStream.writeBoolean(outputBoolean[i]);
                    outputDataStream.writeInt(outputInteger[i]);
                    outputDataStream.flush();
                    outputRecord = outputStream.toByteArray();
                    recordstore.addRecord(outputRecord, 0, outputRecord.length);
                }
                
                outputStream.reset();
                outputStream.close();
                outputDataStream.close();
            } catch ( Exception error) {
                alert = new Alert("Error Writing",
                        error.toString(), null, AlertType.WARNING);
                alert.setTimeout(Alert.FOREVER);
                display.setCurrent(alert);
            }
            
// Read records from RMS.........
            try {
/* String inputString = null;
int inputInteger = 0;
boolean inputBoolean = false; */
                
                StringBuffer buffer = new StringBuffer();
                
                byte[] byteInputData = new byte[100];
                ByteArrayInputStream inputStream = new ByteArrayInputStream(byteInputData);
                DataInputStream inputDataStream = new DataInputStream(inputStream);
                int numrec = recordstore.getNumRecords();
                System.out.println(" Num rec "+numrec);
                for(int i=1;i<=numrec;i++) {
// recordstore.getRecord(i);
                    recordstore.getRecord(i,byteInputData,0);
                    buffer.append(inputDataStream.readUTF());
                    buffer.append("\n");
                    buffer.append(inputDataStream.readBoolean());
                    buffer.append("\n");
                    buffer.append(inputDataStream.readInt());
                    buffer.append("\n");
                    alert = new Alert("Reading", buffer.toString(),
                            null, AlertType.WARNING);
                    alert.setTimeout(Alert.FOREVER);
                    display.setCurrent(alert);
                }
/* recEnum = recordstore.enumerateRecords(null,null,false);
while (recEnum.hasNextElement())
{
recordstore.getRecord(recEnum.nextRecordId(),byteInputData,0);
buffer.append(inputDataStream.readUTF());
buffer.append("\n");
buffer.append(inputDataStream.readBoolean());
buffer.append("\n");
buffer.append(inputDataStream.readInt());
buffer.append("\n");
alert = new Alert("Reading", buffer.toString(),
null, AlertType.WARNING);
alert.setTimeout(Alert.FOREVER);
display.setCurrent(alert);
}
 */
                inputStream.close();
                inputDataStream.close();
            } catch (Exception error) {
                alert = new Alert("Error Reading",
                        error.toString(), null, AlertType.WARNING);
                alert.setTimeout(Alert.FOREVER);
                display.setCurrent(alert);
            }
            try {
                recordstore.closeRecordStore();
            } catch (Exception error) {
                alert = new Alert("Error Closing",
                        error.toString(), null, AlertType.WARNING);
                alert.setTimeout(Alert.FOREVER);
                display.setCurrent(alert);
            }
        }
        
        else if( command == delete) {
            
            if (RecordStore.listRecordStores() != null) {
                try {
                    RecordStore.deleteRecordStore("myRecordStore");
                } catch (Exception error) {
                    alert = new Alert("Error Removing",
                            error.toString(), null, AlertType.WARNING);
                    alert.setTimeout(Alert.FOREVER);
                    display.setCurrent(alert);
                }
            }
        }
    }
}