MZU06t14

1protected void onCreate(Bundle savedInstanceState) {
2    super.onCreate(savedInstanceState);
3    setContentView(R.layout.activity_main);
4
5    SQLiteDatabase myDB= null;
6    String TableName = "myTable";
7
8    String Data="";
9
10
11    try {
12        myDB = this.openOrCreateDatabase("SimpleExpense", MODE_PRIVATE, null);
13
14
15        myDB.execSQL("CREATE TABLE IF NOT EXISTS "
16                +"accounts"
17                + " (accountNo VARCHAR, bankName VARCHAR,accountHolderName VARCHAR,initialBalance REAL;)");
18
19        myDB.execSQL("CREATE TABLE IF NOT EXISTS "
20                +"transactions"
21                + " (date DATE,accountNo VARCHAR,expenseType VARCHAR, amount REAL");
22    }
23    catch(Exception e) {
24        Log.e("Error", "Error", e);
25	
26// All Static variables
27// Database Version
28private static final int DATABASE_VERSION = 1;
29
30// Database Name
31private static final String DATABASE_NAME = "contactsManager";
32
33// Contacts table name
34private static final String TABLE_CONTACTS = "contacts";
35
36// Contacts Table Columns names
37private static final String KEY_ID = "id";
38private static final String KEY_NAME = "name";
39private static final String KEY_PH_NO = "phone_number";
40
41public DatabaseHandler(Context context) {
42    super(context, DATABASE_NAME, null, DATABASE_VERSION);
43}
44
45// Creating Tables
46@Override
47public void onCreate(SQLiteDatabase db) {
48    String CREATE_CONTACTS_TABLE = "CREATE TABLE " + TABLE_CONTACTS + "("
49            + KEY_ID + " INTEGER PRIMARY KEY," + KEY_NAME + " TEXT,"
50            + KEY_PH_NO + " TEXT" + ")";
51    db.execSQL(CREATE_CONTACTS_TABLE);
52}
53
54// Upgrading database
55@Override
56public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
57    // Drop older table if existed
58    db.execSQL("DROP TABLE IF EXISTS " + TABLE_CONTACTS);
59
60    // Create tables again
61    onCreate(db);
62}
63
64/**
65 * All CRUD(Create, Read, Update, Delete) Operations
66 */
67
68// Adding new contact
69void addContact(Contact contact) {
70    SQLiteDatabase db = this.getWritableDatabase();
71
72    ContentValues values = new ContentValues();
73    values.put(KEY_NAME, contact.getName()); // Contact Name
74    values.put(KEY_PH_NO, contact.getPhoneNumber()); // Contact Phone
75
76    // Inserting Row
77    db.insert(TABLE_CONTACTS, null, values);
78    db.close(); // Closing database connection
79}
80
81// Getting single contact
82Contact getContact(int id) {
83    SQLiteDatabase db = this.getReadableDatabase();
84
85    Cursor cursor = db.query(TABLE_CONTACTS, new String[] { KEY_ID,
86            KEY_NAME, KEY_PH_NO }, KEY_ID + "=?",
87            new String[] { String.valueOf(id) }, null, null, null, null);
88    if (cursor != null)
89        cursor.moveToFirst();
90
91    Contact contact = new Contact(Integer.parseInt(cursor.getString(0)),
92            cursor.getString(1), cursor.getString(2));
93    // return contact
94    return contact;
95}
96
97// Getting All Contacts
98public List<Contact> getAllContacts() {
99    List<Contact> contactList = new ArrayList<Contact>();
100    // Select All Query
101    String selectQuery = "SELECT  * FROM " + TABLE_CONTACTS;
102
103    SQLiteDatabase db = this.getWritableDatabase();
104    Cursor cursor = db.rawQuery(selectQuery, null);
105
106    // looping through all rows and adding to list
107    if (cursor.moveToFirst()) {
108        do {
109            Contact contact = new Contact();
110            contact.setID(Integer.parseInt(cursor.getString(0)));
111            contact.setName(cursor.getString(1));
112            contact.setPhoneNumber(cursor.getString(2));
113            // Adding contact to list
114            contactList.add(contact);
115        } while (cursor.moveToNext());
116    }
117
118    // return contact list
119    return contactList;
120}
121
122// Updating single contact
123public int updateContact(Contact contact) {
124    SQLiteDatabase db = this.getWritableDatabase();
125
126    ContentValues values = new ContentValues();
127    values.put(KEY_NAME, contact.getName());
128    values.put(KEY_PH_NO, contact.getPhoneNumber());
129
130    // updating row
131    return db.update(TABLE_CONTACTS, values, KEY_ID + " = ?",
132            new String[] { String.valueOf(contact.getID()) });
133}
134
135// Deleting single contact
136public void deleteContact(Contact contact) {
137    SQLiteDatabase db = this.getWritableDatabase();
138    db.delete(TABLE_CONTACTS, KEY_ID + " = ?",
139            new String[] { String.valueOf(contact.getID()) });
140    db.close();
141}
142
143
144// Getting contacts Count
145public int getContactsCount() {
146    String countQuery = "SELECT  * FROM " + TABLE_CONTACTS;
147    SQLiteDatabase db = this.getReadableDatabase();
148    Cursor cursor = db.rawQuery(countQuery, null);
149    cursor.close();
150
151    // return count
152    return cursor.getCount();
153}
154	
155/**
156     * CRUD Operations
157     * */
158    // Inserting Contacts
159    Log.d("Insert: ", "Inserting .."); 
160    db.addContact(new Contact("Ravi", "9100000000"));        
161    db.addContact(new Contact("Srinivas", "9199999999"));
162    db.addContact(new Contact("Tommy", "9522222222"));
163    db.addContact(new Contact("Karthik", "9533333333"));
164
165    // Reading all contacts
166    Log.d("Reading: ", "Reading all contacts.."); 
167    List<Contact> contacts = db.getAllContacts();