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142 lines
4.5 KiB
142 lines
4.5 KiB
12 years ago
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package acr.browser.barebones;
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import java.util.ArrayList;
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import java.util.List;
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import android.content.ContentValues;
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import android.content.Context;
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import android.database.Cursor;
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import android.database.sqlite.SQLiteDatabase;
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import android.database.sqlite.SQLiteOpenHelper;
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public class DatabaseHandler extends SQLiteOpenHelper {
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// All Static variables
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// Database Version
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private static final int DATABASE_VERSION = 1;
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// Database Name
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private static final String DATABASE_NAME = "historyManager";
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// HistoryItems table name
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private static final String TABLE_HISTORY = "history";
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// HistoryItems Table Columns names
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private static final String KEY_ID = "id";
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private static final String KEY_URL = "url";
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private static final String KEY_TITLE = "title";
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public DatabaseHandler(Context context) {
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super(context, DATABASE_NAME, null, DATABASE_VERSION);
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}
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// Creating Tables
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@Override
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public void onCreate(SQLiteDatabase db) {
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String CREATE_CONTACTS_TABLE = "CREATE TABLE " + TABLE_HISTORY + "("
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+ KEY_ID + " INTEGER PRIMARY KEY," + KEY_URL + " TEXT,"
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+ KEY_TITLE + " TEXT" +")";
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db.execSQL(CREATE_CONTACTS_TABLE);
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}
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// Upgrading database
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@Override
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public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
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// Drop older table if existed
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db.execSQL("DROP TABLE IF EXISTS " + TABLE_HISTORY);
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// Create tables again
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onCreate(db);
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}
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/**
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* All CRUD(Create, Read, Update, Delete) Operations
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*/
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// Adding new item
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void addHistoryItem(HistoryItem item) {
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SQLiteDatabase db = this.getWritableDatabase();
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ContentValues values = new ContentValues();
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values.put(KEY_URL, item.getUrl()); // HistoryItem Name
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values.put(KEY_TITLE, item.getTitle()); // HistoryItem Phone
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// Inserting Row
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db.insert(TABLE_HISTORY, null, values);
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db.close(); // Closing database connection
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}
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// Getting single item
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HistoryItem getHistoryItem(int id) {
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SQLiteDatabase db = this.getReadableDatabase();
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Cursor cursor = db.query(TABLE_HISTORY, new String[] { KEY_ID,
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KEY_URL, KEY_TITLE}, KEY_ID + "=?",
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new String[] { String.valueOf(id) }, null, null, null, null);
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if (cursor != null)
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cursor.moveToFirst();
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HistoryItem item = new HistoryItem(Integer.parseInt(cursor.getString(0)),
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cursor.getString(1), cursor.getString(2));
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// return item
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return item;
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}
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// Getting All HistoryItems
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public List<HistoryItem> getAllHistoryItems() {
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List<HistoryItem> itemList = new ArrayList<HistoryItem>();
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// Select All Query
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String selectQuery = "SELECT * FROM " + TABLE_HISTORY;
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SQLiteDatabase db = this.getWritableDatabase();
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Cursor cursor = db.rawQuery(selectQuery, null);
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// looping through all rows and adding to list
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if (cursor.moveToFirst()) {
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do {
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HistoryItem item = new HistoryItem();
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item.setID(Integer.parseInt(cursor.getString(0)));
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item.setUrl(cursor.getString(1));
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item.setTitle(cursor.getString(2));
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// Adding item to list
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itemList.add(item);
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} while (cursor.moveToNext());
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}
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// return item list
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return itemList;
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}
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// Updating single item
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public int updateHistoryItem(HistoryItem item) {
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SQLiteDatabase db = this.getWritableDatabase();
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ContentValues values = new ContentValues();
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values.put(KEY_URL, item.getUrl());
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values.put(KEY_TITLE, item.getTitle());
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// updating row
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return db.update(TABLE_HISTORY, values, KEY_ID + " = ?",
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new String[] { String.valueOf(item.getID()) });
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}
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// Deleting single item
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public void deleteHistoryItem(HistoryItem item) {
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SQLiteDatabase db = this.getWritableDatabase();
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db.delete(TABLE_HISTORY, KEY_ID + " = ?",
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new String[] { String.valueOf(item.getID()) });
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db.close();
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}
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// Getting items Count
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public int getHistoryItemsCount() {
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String countQuery = "SELECT * FROM " + TABLE_HISTORY;
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SQLiteDatabase db = this.getReadableDatabase();
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Cursor cursor = db.rawQuery(countQuery, null);
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cursor.close();
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// return count
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return cursor.getCount();
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}
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}
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