2023年Android实验一实验报告.docx

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1、A n droi d实验报告一姓名：丁军峰班级：信科123学号：08 1 2 3448a n d r o id:backgro u n d = # fffff ff fCmaReBut I ona n d r oid:i d = +id/id_ib_de le t e andr oid : la y ou t _w i dt h =r, ”a ndroid:layout_h c i ght= wr ap_ con tentand roid: layout_weig h t = 1 and roid :sr c =draMa b Le/ic_me nu_deLeteand roi d ： bac

2、kground =为力方/手 fandroi d :o n Click=r,det eteltem/3.创建数据库pa c k a g e com.LIQI.Stuff;i mport android.c o n tent.Co n t ex t ;impo r tandro id.databa s e.s q lit e.SQL i t e Da t abase；im p orta n dr o id.databa s e.sq1 it e . S QLiteDatab a s e . CursorFacto ry：i mporta ndroid.data b a se. sq1 ite.

3、S QLiteOp e nH e Iper;public c 1a ssMySQLit e 0 p enHe I p er e x t e nds S Q L ite 0 penHelp er。 public M y SQLiteOpenH e IperfConte x t co n t e x t3) super(con t ext, LI Q I .db, null, 1)；/ / TO D O Aut o ge n e rated c o ns t ructor s t ub )Ov e r ridepu b 1 i c vo i d onCr e ate( S QLi t eDatab

4、a s e db) o d b . e xecSQL( c re a t e table LI QI (Jd inte g erprimary ke y a u t oincrement , s t u f f,am o u n t ,p r ice);3 Ove r ridep u bl i c vo i d onUp g rade (SQL i t e Databas e db, int o Id Ve r s i o n, i n t n ewVers i on) 33/ TODO Au t o-generat e d method stub)4.创建a cco u nt类p a ck

5、a ge com. L I QI. Stu f f ;p ubli c clas s St u f f pri v ate St r i ng stu f f N a me;pr i vate int Stuf f Am o unt;p r i v a te flo a t S tuffP r ic e ；pu b lie Stri n g get S tu f f N a me() 3 ret urn stu f fName；public void s e tStuffName(S t ring s t u f fNam e ) ，t h i s . st u ffN a me = stuf

6、 f Nam e ;)pu blic i n t g etS t uffAmount() return Stuf f Am o un t ;p u bl i c void se t S t uff Amount(int stuff Amount) Stuff Amount = s t u ffAm o unt;)pub 1 i c float g e t St u ff Pric e ()r eturn St u ffPrice;)pub lie void se t Stu f fPri c e ( f loat s tuf f Price) St u ff Price = stuf f Pr

7、i c e;)5.创建数据操作逻辑pa c k a g e c o m.LIQ I .St u ff;i mp o rt java.ut i I. Array List;import java. util. List：i mport androi d .a p p .Activity;import a n d r oid.d a tab a se. C u r sor;import andr o id. d atabase. s q 1 ite. SQLit e Databa s e；i mport a nd r oid.os. Bundle;impo r t android, vie w.

8、Vie w ；impor t androi d . v iew. V iew. OnClickList e n e r;import a ndroid.view.Vie w G roup；impo r t a ndr o id. wi d get. BaseA d ap t er;import a ndroid.w i d ge t .ImageButt o n;import android.wi d get.lma g eView；i mport android.widget. L i s t V i e w；impo r t android. w i dget.Te x tVj e w：i

9、 mpo r t andr o id. w i dge t . To a s t;pu b I i c c la s s Stu ffLis t exte n ds A c tivit y pri v at e Li s t V i ew 1 v;o p ri v ate SQL i t eDa t abase mDa t aBa s e ；privat e L i s tstu f f I nfos;。p r ivate M y S Q Lite 0 penHelper mHelper； 0 ver rid ep r otect e d void o nCreat e (Bun d Ie s

10、 aved I nstan c eSt a t e) a setConten t V i ew(R. 1 ayout. s h ow_al 1 );mHel per =ne w MySQL i teOpenH e I p e r ( t h i s)； 0lv=(ListView ) f i n dVi e wByld( R . id .id_lv);all()： su p er.o n C re a t e(sav e d I nst a nceS t a t e);)p u b lie void a 1 l()o mDataB a se = mH e I p er.getWritab 1

11、eD a t a b a s e ()； 0 0a Cursor curs o r=mDataBa s e. q u eryCLlQI, null, null, nu 1 I, null, n u 1 I, nu 1 I)：st u f fl n f o s=new A r r a yLi s t ()；o wh i 1 e(c u r sor. moveToNe x t() ) a。S t u ff s t uff=n e w St u ff(); stu f f .sets t uf f N a me ( c ursor.getString(l);o。s t u ff.s e tStuff

12、Am o un t (cu r s or.g e tint (2);stuff.setStuffPri c e( c u r s o r .ge t Float(3)： stuf f I n f o s .a d d (stuff)；)cu r s o r .clos e ()；o mData Bas e .close();o d v .setAd a pt e r ( new Myadapter();c 1 ass My a dapte r exte n ds BaseAdaptero Overr i d eo p u blic int getCoun t ) o r e turn stu

13、f flnfo s .s i ze()；Oft)a 0v e r ri d e。public Ob j ect ge t Itemfint pos i tion) o / TODO Aut o ge n erate d metho d stubr etu r n null;0)Overri d eo public Ion g get I t em I d (i n t pos i ti o n ) 。/ T ODO Autog e n e rated m e tho d st u b。return 0;)。Ov e rride p u blic View g et V i ew(fina 1

14、int positi o n, Vi e w v i e w , Vi e wG r oup parent)v i ew = View.i n flate (S t u ff L i st.thi s , R. 1 ayo u t. s tuf f Jtem, n u 1 I);ooTextView t v_n am e = (TextV i ew) view . f ind Vi e wB y ld(R.id.id_tv_name);。 Te x tView t v_ a mount=(Tex t View)view . fi n d ViewByldf R.id.i d _tv_amoun

15、 t );Tex tView tv_p r i c e = (TextVie w) view . f in d V iewByld(R.i d .i d _ t v_pr iI m age B u t ton i Bu t t on = (ImageButto n ) vie w . f i n d V i ewByl d(R.id.id_ib_del e t e);o。tv_nam e. s e tText(stuff Infos.getfpos i t ion).g e tStu f fN a me ();。 tv_am o u n t . s e tText(数量(个)+stuffl n

16、fo s .get(positi o n). getStu f fAm o unt();。t v_pri c e.setText(单价(元)+s t u f f I nf o s ,g e t(position).getS tu f f Price ();iButton.se t OnC 1 ick L istene r (new On C lickListe n er () Over r ide publi c v oi d o nClick(View v) mDa t aBas e =mHelper. ge t Writ a b Ie Data b a se();omDataBase. d

17、 el c te(LIQI, H stuff =?f new S t ri n g stu f f I n fos.getfpo siti o n). g etStu f fName()：s mDat a Bas e . c 1 o se();stuff Infos. r emove(p o s i t i o n);。o Myad a p t e r .t h is. n otifyDataSetC h anged()；）：r e turn v i ew;6.编写界面交互代码pa c kage c om.LIQI. Stu f f;im p ort a n d r o id. a pp.A

18、c tivity;im p ort andro i d.conten t .C o n t e n t V a lues;im p ort a n d ro i d. c o n t ent. In t ent;i mp o rt andr o id.dat a b a se. s q lite.SQLi t e D atabase;import android, o s .Bu n die;import an d roid.vi e w. V iew;i m p ort androi d .vi e w.View.On Cli c kLis t ener;impor t a n dro i

19、d.wi d get.B u tt o n； i mport an d r oid.wi d g e t.E d itT e x t;import and r oid. w id g e t .T o a st;publ i c class Ma i nAc t i v i t y extends Activity i mpl e me n ts O n ClickListen e rprivate MySQLiteOpe n Hei p er mH e Iper;private SQLi t e Da t abase mDataBase;priv ate Button bt_add,b t

20、_ a II；pri v a t e EditText et_stuffName, et_s t u ffAmou n t ,et_ s tu f f P rice; Ove r rid epr o tect e d voi d o nCreat e (B u n d 1 e savedin s tanceS t ate) s u p e r .o n Createfsa v e d I nsta n ceState);a setC o nt e n t View(R.layout. ad d _d a t a);mHe 1 per=new MySQLileOp enHelpe r (t h

21、is);i n i tVi e w ();。i n i tA c t i o n()：)p u b lie void i nitView() e t_ s t uffName=(E d itT e x t ) f i ndV i ewByld ( R. i d .id_et_stuff n am e )：et_ stu ffAm o u n t= (EditT ext) findViewByld(R. i d.id_et_stuffam o u nt);et_stu f f Pr i ce=(Ed i tText) findV i ewByld(R. i d . i d_e t _stuf f

22、 pr i z e);bt_ a d d = (But ton) findV i e wB y Id( R.id. i d _ b t_ a dd);b t_ a I 1 =(Button) findView Byld(R. i d . i d b t al 1 );pu b I i c v oid initAction() 3 b t_ad d . s et 0 n C lickListe n e r (this); 0。 bt_ a I 1 .setOnClic k L i s t e n er (th i s); 00 Ov e r ri d epubli c voi d o n Cli

23、ckfV i e w v) s w it c h (v.getld () 。case R. i d. i d_b t _add：。a dd (); b r e ak;a case R. id.i d bt a 1 I:。Inten t int e n t =n e w lntent(t h is,Stuf f L i s t .cla s s);， st a rt A c t ivity(intent);o break;a ) p ub 1 ic voi d add ()。o String s t u f f N a me=et_ s tuffName.getText() .t o St r

24、in g (). t r i m();。i n t stu f fAmou n t =ln t ege r . p ars e lnt(et_ s t u ffAm o unt. get Tex t (). toS t rin g (). trim ()；f 1 o at st u ffPrice= F loat. p arseFloat(et_s t uff Pri c e.ge t T c xt() .toStr i ng () .tri m();。S t u f f s t uff=new S t uff();stu f f. s etStuffName (s t uffNam e )；

25、st u ff.se t St u ff A m o u nt(s t uffAm o u n t)；stuff. s e t S t uffPri c efstuf f Pri c e)；o mDa t a Ba s e =m Helper, g e tWr i t a b 1 eDatabas e ()；C o nt e n t Va 1 ue s contentVal u es=new Co n tentValues();c o nt e ntValues. put(stu f fz stuff, g etStuffName ();con tentVa 1 u es. put( a mo

26、unt, stuff.ge t S t uffAmo u n t ();c ont e ntV a lu e s. put(p r i c e , stuff.getS t uffPrice()： long number=mDataBase.insert( LIQI , null, co n t entV a 1 ues);i f(num b er= -1) Toast, mak e Tex t (th i s,添加失败,1) .sh o w()；else 。e t _stuffAmo u nt.s e tTe x t (); e t _ s tuffN a me.se t Te x t()：

27、。 et_stuf f Pri c e.se t Tex to Toast, mak e T e x t(thi s ,添加成功，物品条数,+number,l) .show。;。)m Data Base, c 1 os e ()；。7 . Man ifest? x ml ve r s i on= 1. 0 e n c o di n g=ua c tivit y andro i d： nam e = com. LIQI.Stuff .S t uffListx/a c t i v i五、实验结果程序界面显示Basic ControlsQ 0 0Hardware ButtonsDPAD M enab

28、led in AVO 5554：App4 M 6:44B APP物品清单物品名称wer物品个数132物品价格13232Hardware KeyboardUse your physical keyboard to provide mput添加记录 显示全部 5554：AppM 6：42 Basic Controls11wewerttffgddswerer数（个）2数量（个）23致（个）23数（个）34单价（元）4.0单价（元R450单价阮）3453.0单价（元）23.0S0S0Hardware Buttons090DPAD not enabled in AVOHardware KeyboardU

29、se your physical keyboard to provide input一、实验内容编写一个And r。id应用程序，实现对自己物品的管理，功能涉及添加、删除和查询等二、实验目的了解android开发流程，掌握SQL i t e数据库和ListView控件的使用三、需求分析使用S QLite数据库，使用L i stView控件显示物品四、实验过程1.创建程序，设计用户交互界面Text Vie wandr o id: 1 ayo u t_width= v)ra p_c o nt ent ” androi d : lay o ut_height= wrap_co n tent a n

30、d ro i d ： t e x t=物品价格IFrameL a youtandroid :1a you t _w i dth=match_p a renta n d no i d:la y o ut_h e ight= wr ap_c on ten t2.创建 ListV i ew Item布局? x ml ve r sion= 1.0 enco din g-ut fLinearL a yout x ml n s： a n dro i d =androi d ： layout_width= mat c h_ po renta n d r o id: layou t _height=matc h_parentandr o i d: orientatio n-ho r i zont a L