我的android 第15天 -使用SQLiteOpenHelper获取用于

操作数据库的SQLiteDatabase实例

?

?

public class DatabaseHelper extends SQLiteOpenHelper {

???????? private static final String name ="itcast";//数据库名称

???????? private static final int version = 1; //数据库版本

???????? ......略

}

public class HelloActivity extends Activity {

???@Override public void onCreate(Bundle savedInstanceState) {

??????? ......

??????? Button button =(Button) this.findViewById(R.id.button);

??????? button.setOnClickListener(new View.OnClickListener(){

? publicvoid onClick(View v) {

? DatabaseHelperdatabaseHelper