Apps open,close database,insert values,fetch values, update and delete values in database

[zalani]

//--------open database -----------------

public SQLiteDatabase openDataBase() throws SQLException {
// Open the database
String myPath = DB_PATH + DB_NAME;
return myDB = SQLiteDatabase.openDatabase(myPath, null,
SQLiteDatabase.OPEN_READWRITE);
}

//-------close database------------

@Override
public synchronized void close() {
if (myDB != null)
myDB.close();
super.close();
}

//---------insert query to insert entry in database---------

public long insertUser(String uname,String upass) {
try{
myDB = this.getWritableDatabase();
String insertUser = "insert into user (username,password) values (?,?)";
this.insertStmt = myDB.compileStatement(insertUser);
this.insertStmt.bindString(1, uname);
this.insertStmt.bindString(2, upass);
}catch(Exception er){
er.printStackTrace();
}
return this.insertStmt.executeInsert();
}

//--------select query to fetch data from database-------------

public ArrayList<String> selectloginpass() {
// boolean success = false;
openDataBase();
ArrayList<String> user_id_pass = new ArrayList<String>();
try{

Cursor cursor = myDB.query("user", new String[] { "id_user,phone,password,fbtoken" },
null, null, null, null, null,null);

if (cursor.moveToFirst()) {
do {
user_id_pass.add(cursor.getString(0));
user_id_pass.add(cursor.getString(1));
user_id_pass.add(cursor.getString(2));
user_id_pass.add(cursor.getString(3));

} while (cursor.moveToNext());
}
if (cursor != null && !cursor.isClosed()) {
cursor.close();
}

}catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}

return user_id_pass;
}

//--------delete values from database----------
public void deleteAll()
{
try{
All_data.database_category="";
myDB = this.getWritableDatabase();
String deletecitydata = "Delete FROM CITIES";
String deleteCATEGORIESdata = "Delete FROM CATEGORIES";
String deleteCOMPANIESdata = "Delete FROM COMPANIES";
String deleteMAIN_TABLEdata = "Delete FROM MAIN_TABLE";
String deleteCOMMENTSdata = "Delete FROM COMMENTS";
String deleteLIKECOMMENTSdata = "Delete FROM LIKECOMMENTS";
String deleteUserData = "Delete FROM user";
String initializeUser = "INSERT INTO user (id_user, phone, password, scancontact, fbtoken, comments_updated, companies_updated ) values ('','','','yes','', '20110301000000','20110301000000' ) ";
myDB.execSQL(deletecitydata);
myDB.execSQL(deleteCATEGORIESdata);
myDB.execSQL(deleteCOMPANIESdata);
myDB.execSQL(deleteMAIN_TABLEdata);
myDB.execSQL(deleteCOMMENTSdata);
myDB.execSQL(deleteLIKECOMMENTSdata);
myDB.execSQL(deleteUserData);
myDB.execSQL(initializeUser);
} catch(Exception er)
{
er.printStackTrace();

}




}

//------update user table in database----------------
public void updatelogin(String mIdUser, String mPhone, String mPassword, String mFBToken )
{
myDB = this.getWritableDatabase();

if (mPhone == null || mPhone == "null") {
mPhone="";
}

if (mPassword == null || mPassword == "null") {
mPassword="";
}

String insertcitydata = "update user set id_user='"+mIdUser+"',phone='"+mPhone+"',password='"+mPassword+"',fbtoken='"+mFBToken+"',scancontact='yes'";
// String insertcitydata = "insert into CITIES(ID_CITY,comune) values (?,?)";
myDB.execSQL(insertcitydata);
}