Android开发SQLite的数据在哪里怎么存储

public class DataBaseHelper extends SQLiteOpenHelper {

//DataBaseHelper继承自SQLiteOpenHelper。



    private Context mContext;



    /*

    DataBaseHelper中：

    （Context 对数据库进行操作，

    数据库名字 创建数据库时使用这个名称，

    一般null 在查询数据时返回一个自定义的Cursor，

    当前数据库版本号，用于对数据库进行升级操作）

     */

    public DataBaseHelper(Context context,String name,SQLiteDatabase.CursorFactory factory,int version){

        super(context,name,factory,version);

        mContext=context;

    }



    @Override

    public void onCreate(SQLiteDatabase db){

        db.execSQL("CREATE TABLE HomeIemData (" +

                "home_ID integer primary key autoincrement," +

                "hometitle text unique," +

                "homecontent text unique," +

                "homedata text unique);");

        //db.execSQL(CREATE_HOMEITEMDATA);//建表，而非数据库。

        Toast.makeText(mContext,"Create HomeItemData succeeded",Toast.LENGTH_SHORT).show();

        Log.d("TAG", "***********************已经创建好HomeItemData表********************** ");

        System.out.println("***********************已经创建好HomeItemData表********************** ");

    }



    @Override

    public void onUpgrade(SQLiteDatabase db,int oldVersion,int newVersion){

        switch (oldVersion){

            case 1:

                db.execSQL("drop table if exists HomeItemData ");

                onCreate(db);

            default:

        }



        

    }



}

public class HomeItemData {

//HomeItemData 实体类



    public static final String TABLE="HomeItemData";



    private int home_ID;

    private String hometitle;

    private String homecontent;

    private String homedata;



    public int getHome_ID() {

        return home_ID;

    }



    public void setHome_ID(int home_ID) {

        this.home_ID = home_ID;

    }



    public String getHometitle() {

        return hometitle;

    }



    public void setHometitle(String hometitle) {

        this.hometitle = hometitle;

    }



    public String getHomecontent() {

        return homecontent;

    }



    public void setHomecontent(String homecontent) {

        this.homecontent = homecontent;

    }



    public String getHomedata() {

        return homedata;

    }



    public void setHomedata(String homedata) {

        this.homedata = homedata;

    }

}

public class HomeDataOperator {

// HomeDataOperator 操作类。



    private DataBaseHelper dbHelper;

    //private SQLiteDatabase db;



    public HomeDataOperator(Context context){



        dbHelper =new DataBaseHelper(context,"HomeItemData.db",null,1);

        

    }



    public void Insert(HomeItemData homeItemData){

        SQLiteDatabase db=dbHelper.getWritableDatabase();



        //准备数据。

        ContentValues values=new ContentValues();

        values.put("hometitle",homeItemData.getHometitle());

        values.put("homecontent",homeItemData.getHomecontent());

        values.put("homedata",homeItemData.getHomedata());



        //通过ContentValues中的数据拼接SQL语句,执行插入操作,id为表中的一个列名。

        db.insert("HomeItemData","home_ID",values);

        db.close();

           }



    public void delete(int home_ID){

        SQLiteDatabase db=dbHelper.getWritableDatabase();



        //执行删除操作,在person表中删除id为指定值的记录。

        db.delete("HomeItemData","home_ID=?",new String[]{String.valueOf(home_ID)});

        db.close();

    }



    public void update(HomeItemData homeItemData){

        SQLiteDatabase db=dbHelper.getWritableDatabase();



        //要更新的数据。

        ContentValues values=new ContentValues();

        values.put("hometitle",homeItemData.getHometitle());

        values.put("Homecontent",homeItemData.getHomecontent());

        values.put("Homedata",homeItemData.getHomedata());



        //更新person表中id为指定值的记录。

        db.update("HomeItemData",values,"Home_ID=?",new String[]{String.valueOf(homeItemData.getHome_ID())});



        db.close();

    }



    public HomeItemData query(int Home_ID){

        SQLiteDatabase db=dbHelper.getWritableDatabase();



        //用游标Cursor接收从数据库检索到的数据。

        Cursor cursor=db.query(false,"HomeItemData",new String[]{"hometitle","Homecontent","Homedata"},

                "Home_ID=?",

                new String[]{String.valueOf(Home_ID)},null,null,null,null);

        //判断游标是否为空。

        HomeItemData homeItemData=null;

        //判断Cursor是否有下一条记录。

        //依次取出数据。

        if (cursor.moveToFirst()){

            homeItemData =new HomeItemData();

            homeItemData.setHome_ID(cursor.getInt(cursor.getColumnIndex("home_ID")));

            homeItemData.setHometitle(cursor.getString(cursor.getColumnIndex("hometitle")));

            homeItemData.setHomecontent(cursor.getString(cursor.getColumnIndex("homecontent")));

            homeItemData.setHomedata(cursor.getString(cursor.getColumnIndex("homedata")));

                    }

        //释放资源。

        cursor.close();

        db.close();

        return homeItemData;



    }



    public List<HomeItemData> findAll(){

        //查询所有记录。

        List<HomeItemData> lists=new ArrayList<HomeItemData>();

        HomeItemData homeItemData=null;

        SQLiteDatabase db=dbHelper.getWritableDatabase();

        //rawQuery()方法的第一个参数为select语句；第二个参数为select语句中占位符参数的值。

        Cursor cursor=db.rawQuery("select * from HomeItemData",null);

        while (cursor.moveToNext()){

            homeItemData=new HomeItemData();

            homeItemData.setHome_ID(cursor.getInt(cursor.getColumnIndex("home_ID")));

            homeItemData.setHometitle(cursor.getString(cursor.getColumnIndex("hometitle")));

            homeItemData.setHomecontent(cursor.getString(cursor.getColumnIndex("homecontent")));

            homeItemData.setHomedata(cursor.getString(cursor.getColumnIndex("homedata")));

            lists.add(homeItemData);



        }



        db.close();

        return lists;



    }



}

//主活动oncreate里：

dataBaseHelper =new DataBaseHelper(this,"HomeData.db",null,1);

 db=dataBaseHelper.getWritableDatabase();