import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.rms.*;
public class DemoRMS extends MIDlet
implements CommandListener {
private Display display;
private Form form;
private RecordStore rs;
private RecordEnumeration re;
private ChoiceGroup choicegroup;
private Alert alert;
private List list;
//untuk proses entri data
private Form entri;
private TextField tfNama, tfNoTelp;
private final Command cmdKeluar =
new Command("Keluar", Command.EXIT, 1);
private final Command cmdPilih =
new Command("Pilih", Command.OK, 1);
private final Command cmdSimpan =
new Command("Simpan", Command.SCREEN, 1);
private final Command cmdHapus =
new Command("Hapus", Command.SCREEN, 1);
private final Command cmdKembali =
new Command("Kembali", Command.BACK, 1);
public DemoRMS() {
display = Display.getDisplay(this);
alert = new Alert(null);
alert.setTimeout(Alert.FOREVER);
list = new List(null, Choice.IMPLICIT);
rs = null;
// membuat atau membuka record store
try {
rs = RecordStore.openRecordStore("contohDB", true);
} catch (RecordStoreException rse) {
alert.setString("Record store tidak dapat dibuka. " +
"Aplikasi akan dihetikan");
alert.setType(AlertType.ERROR);
display.setCurrent(alert, null);
System.exit(1);
}
}
public void startApp() {
form = new Form("Demo RMS");
choicegroup = new ChoiceGroup("Menu:", Choice.EXCLUSIVE);
choicegroup.append("Tambah Record", null);
choicegroup.append("Daftar Record", null);
form.append(choicegroup);
form.addCommand(cmdKeluar);
form.addCommand(cmdPilih);
form.setCommandListener(this);
display.setCurrent(form);
}
public void pauseApp() {
}
public void destroyApp(boolean unconditional) {
}
public void commandAction(Command c, Displayable s) {
if (c == cmdKeluar) {
destroyApp(false);
notifyDestroyed();
} else if (c == cmdPilih) {
switch (choicegroup.getSelectedIndex()) {
case 0: {
entriData();
break;
}
case 1: {
lihatRecord();
break;
}
}
} else if (c == cmdKembali) {
display.setCurrent(form);
} else if (c == cmdSimpan) {
alert.setType(AlertType.INFO);
if (!tfNama.equals("") && !tfNoTelp.equals("")) {
tambahRecord(tfNama.getString(), tfNoTelp.getString());
alert.setString("Data baru telah berhasil disimpan");
display.setCurrent(alert, form);
} else {
alert.setString("Data NAMA dan NO. TELP " +
"tidak boleh kosong");
display.setCurrent(alert, entri);
}
} else if (c == cmdHapus) {
int pos =
list.getString(list.getSelectedIndex()).indexOf(" [");
String nama = list.getString(
list.getSelectedIndex()).substring(0, pos);
hapusRecord(nama);
}
}
public void tambahRecord(String nama, String noTelp) {
byte[] temp = null;
try {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(baos);
dos.writeUTF(nama);
dos.writeUTF(noTelp);
temp = baos.toByteArray();
} catch (IOException ioe) {
ioe.printStackTrace();
}
try {
rs.addRecord(temp, 0, temp.length);
} catch (RecordStoreNotOpenException rsnoe) {
rsnoe.printStackTrace();
} catch (RecordStoreException rse) {
rse.printStackTrace();
}
}
public void lihatRecord() {
byte[] temp = null;
list.setTitle("Daftar Record");
list.deleteAll();
try {
re = rs.enumerateRecords(null, null, false);
while (re.hasNextElement()) {
int i = re.nextRecordId();
temp = rs.getRecord(i);
ByteArrayInputStream bais =
new ByteArrayInputStream(temp);
DataInputStream dis = new DataInputStream(bais);
try {
String nama = dis.readUTF();
String noTelp = dis.readUTF();
list.append(nama + " [" + noTelp + "]", null);
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
list.addCommand(cmdKembali);
list.addCommand(cmdHapus);
list.setCommandListener(this);
display.setCurrent(list);
} catch (InvalidRecordIDException invID) {
invID.printStackTrace();
} catch (RecordStoreNotOpenException rsnoe) {
rsnoe.printStackTrace();
} catch (RecordStoreException rse) {
rse.printStackTrace();
}
}
public void hapusRecord(String nama) {
byte[] temp = null;
try {
re = rs.enumerateRecords(null, null, false);
while (re.hasNextElement()) {
int i = re.nextRecordId();
temp = rs.getRecord(i);
ByteArrayInputStream bais =
new ByteArrayInputStream(temp);
DataInputStream dis = new DataInputStream(bais);
try {
String vNama = dis.readUTF();
if (vNama.equals(nama)) {
rs.deleteRecord(i);
break;
}
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
re.rebuild();
lihatRecord();
} catch (RecordStoreNotOpenException rsnoe) {
rsnoe.printStackTrace();
} catch (RecordStoreException rse) {
rse.printStackTrace();
}
}
public Form entriData() {
entri = new Form("Entri Data");
tfNama = new TextField("Nama:", null, 25, TextField.ANY);
tfNoTelp = new TextField("No. Telepon:", null, 15,
TextField.PHONENUMBER);
entri.append(tfNama);
entri.append(tfNoTelp);
entri.addCommand(cmdSimpan);
entri.addCommand(cmdKembali);
entri.setCommandListener(this);
display.setCurrent(entri);
return entri;
}
}
