SQLite使用

public class MyOpenHelper extends SQLiteOpenHelper {

	public MyOpenHelper(Context context, String name, CursorFactory factory,
			int version) {
		super(context, name, factory, version);
		// TODO Auto-generated constructor stub
	}

	//數據庫創建時，此方法會調用
	@Override
	public void onCreate(SQLiteDatabase db) {
		db.execSQL("create table person(_id integer primary key autoincrement, name char(10), salary char(20), phone integer(20))");

	}

	//數據庫升級時，此方法會調用
	@Override
	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
		System.out.println("數據庫升級了");
	}
	
	

}

public class TestCase extends AndroidTestCase {

	//此時測試框架還沒有初始化完畢，沒有虛擬上下文對象
//	private MyOpenHelper oh = new MyOpenHelper(getContext(), "people.db", null, 1);
	private MyOpenHelper oh;
	private SQLiteDatabase db;
	public void test(){
		//getContext():獲取一個虛擬的上下文
		MyOpenHelper oh = new MyOpenHelper(getContext(), "people.db", null, 1);
		//如果數據庫不存在，先創建數據庫，再獲取可讀可寫的數據庫對象，如果數據庫存在，就直接打開
		SQLiteDatabase db = oh.getWritableDatabase();
		//如果存儲空間滿了，那麼返回只讀數據庫對象
//		SQLiteDatabase db = oh.getReadableDatabase();
	}
	
	//測試框架初始化完畢之後，在測試方法執行之前，此方法調用
	@Override
	protected void setUp() throws Exception {
		super.setUp();
		
		oh = new MyOpenHelper(getContext(), "people.db", null, 1);
		db = oh.getWritableDatabase();
	}

	//測試方法執行完畢之後，此方法調用
	@Override
	protected void tearDown() throws Exception {
		// TODO Auto-generated method stub
		super.tearDown();
		db.close();
	}
	
	public void insert(){
		
//		db.execSQL("insert into person (name, salary, phone)values(?, ?, ?)", new Object[]{"小志的老婆[1]", "13000", 138438});
//		db.execSQL("insert into person (name, salary, phone)values(?, ?, ?)", new Object[]{"小志的兒子", 14000, "13888"});
		db.execSQL("insert into person (name, salary, phone)values(?, ?, ?)", new Object[]{"小志", 14000, "13888"});
	}
	
	public void delete(){
		db.execSQL("delete from person where name = ?", new Object[]{"小志"});
	}
	
	public void update(){
		db.execSQL("update person set phone = ? where name = ?", new Object[]{186666, "小志的兒子"});
	}
	
	public void select(){
		Cursor cursor = db.rawQuery("select name, salary from person", null);
		
		while(cursor.moveToNext()){
			//通過列索引獲取列的值
			String name = cursor.getString(cursor.getColumnIndex("name"));
			String salary = cursor.getString(1);
			System.out.println(name + ";" + salary);
		}
	}
	
	public void insertApi(){
		//把要插入的數據全部封裝至ContentValues對象
		ContentValues values = new ContentValues();
		values.put("name", "遊天龍");
		values.put("phone", "15999");
		values.put("salary", 16000);
		db.insert("person", null, values);
	}
	
	public void deleteApi(){
		int i = db.delete("person", "name = ? and _id = ?", new String[]{"小志的兒子", "3"});
		System.out.println(i);
	}
	
	public void updateApi(){
		ContentValues values = new ContentValues();
		values.put("salary", 26000);
		int i = db.update("person", values, "name = ?", new String[]{"遊天龍"});
		System.out.println(i);
	}
	
	public void selectApi(){
		Cursor cursor = db.query("person", null, null, null, null, null, null, null);
		while(cursor.moveToNext()){
			String name = cursor.getString(cursor.getColumnIndex("name"));
			String phone = cursor.getString(cursor.getColumnIndex("phone"));
			String salary = cursor.getString(cursor.getColumnIndex("salary"));
			System.out.println(name + ";" + phone + ";" + salary);
		}
	}
	
	public void transaction(){
		try{
			//開啓事務
			db.beginTransaction();
			ContentValues values = new ContentValues();
			values.put("salary", 12000);
			db.update("person", values, "name = ?", new String[]{"小志"});
			
			values.clear();
			values.put("salary", 16000);
			db.update("person", values, "name = ?", new String[]{"小志的兒子"});
			
			int i = 3/0;
			//設置  事務執行成功
			db.setTransactionSuccessful();
		}
		finally{
			//關閉事務，同時提交，如果已經設置事務執行成功，那麼sql語句就生效了，反之，sql語句回滾
			db.endTransaction();
		}
	}
}