Android操作SQLite資料庫基本模式

import android.app.Activity;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;

public class MainActivity extends Activity {

    class Person {
        private String name;
        private int age;
    }

//資料庫線程類
    class DatabaseRunnable implements Runnable {

        @Override
        public void run() {

            // 打開或建立test.db資料庫
            SQLiteDatabase db = openOrCreateDatabase("test.db",
                    Context.MODE_PRIVATE, null);
            db.execSQL("DROP TABLE IF EXISTS person");
            // 建立person表
            db.execSQL("CREATE TABLE person (_id INTEGER PRIMARY KEY AUTOINCREMENT, name VARCHAR, age SMALLINT)");
            Person person = new Person();
            person.name = "john";
            person.age = ;
            // 插入資料
            db.execSQL("INSERT INTO person VALUES (NULL, ?, ?)", new Object[] {
                    person.name, person.age });

            person.name = "david";
            person.age = ;

            // ContentValues以鍵值對的形式存放資料
            ContentValues cv = new ContentValues();
            cv.put("name", person.name);
            cv.put("age", person.age);
            // 插入ContentValues中的資料
            db.insert("person", null, cv);

            cv = new ContentValues();
            cv.put("age", );
            // 更新資料
            db.update("person", cv, "name = ?", new String[] { "john" });

            Cursor c = db.rawQuery("SELECT * FROM person WHERE age >= ?",
                    new String[] { "33" });
            while (c.moveToNext()) {
                int _id = c.getInt(c.getColumnIndex("_id"));
                String name = c.getString(c.getColumnIndex("name"));
                int age = c.getInt(c.getColumnIndex("age"));
                Log.d("db", "_id=>" + _id + ", name=>" + name + ", age=>" + age);
            }
            c.close();

            // 删除資料
            db.delete("person", "age < ?", new String[] { "35" });

            // 關閉目前資料庫
            db.close();

            // 删除test.db資料庫
            deleteDatabase("test.db");

        }

    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

       //初始化線程
        Thread t = new Thread(new DatabaseRunnable());
        t.start();

    }

}