合肥师范android实验报告材料实验五

1、实验报告课程名称：移动设备平台开发院 系：计算机学院专业班级：软件工程学 号：学生：开课时间：2017至2018学年第 一学期师学院计算机学院移动设备平台开发课程验证性实验报告实验名称用户登录注册数据库版功能实现实验时间2017. 10.31学生实验地点实验室同组人员无专业班级软件一班1、实验目的：(1) .设计登录界面和注册页面；(2) .实现用户的注册(存入到数据库)；(3) .从数据库中读入数据，实现登录；(4) .登录成功后来到欢迎页；2、实验主要仪器设备和材料：硬件：微型计算机软件：Eclipse、JDK SDK ADT3 实验原理：An droid基本类的使用SQLite数据库的基

2、本使用，创建数据库，实现增删改查4、实验步骤和代码：(1) .仓 U建登录页面 logi n ma in .xml , welcome mai n.xml比较简单，不复制代码了(2) .创建MyDatabaseHelper,管理数据库publicclass MyDatabaseHelperextends SQLiteOpenHelperprivateContextmContext ;privatefinalstaticStringCREATE_USER = "createtable User(" +"id integerprimarykey autoincreme

3、nt,"+"username varchar(30),"+"password varchar(30)"public MyDatabaseHelper(Context context, String name, CursorFactory factory,int version) super (context, name, factory, version);/ TODOAuto-generated constructor stub mContext = context;Overridepublic void onCreate(SQLiteDat

4、abase db) / TODOAuto-generated method stub db.execSQL( CREATE_USER);Toast. makeText ( mContext , "create database sccussful!"Toast. LENGTH_SHORT).show();Overridepublicvoid onUpgrade(SQLiteDatabase db,/TODOAuto-generated method stubint oldVersion,intnewVerison) (3).创建个User的javabean存储数据priva

5、teint id ;privateStringusername ;privateStringpassword ;写出getter和 setter方法，构造函数(4 )注册功能的实现super .onCreate(savedlnstanceState); setContentView(R .l ayout.register_main );username = (EditText)findViewByld(R.id. password = (EditText)findViewByld(R.id. register = (Button)findViewByld(R.id. myDBHelper =

6、new MyDatabaseHelper(ed_name );ed_pass );bt_register);this , "user.db", null ,1);register .setOnClickListener(new OnClickListener() Overridepublic void onClick(View argO) / TODOAuto-generated method stubString name =username .getText().toString();String pass =password .getText().toString()

7、;Users user = new Users();user.setUsername(name);user.setPassword(pass);SQLiteDatabase db= myDBHelper .getWritableDatabase();ContentValues values =new ContentValues();values.put( "username" , name);values.put( "password" , pass);db.insert( "user" , null , values);Toast.

8、 makeText (getApplicationContext(),Toast. LENGTH_SHORT).show();Intent intent =newlntent(getApplicationContext(),MainActivity. startActivity(intent););(4).登录功能的实现class );protected void onCreate(Bundle savedInstanceState) super .onCreate(savedInstanceState); setContentView(R .l ayout.login_main );user

9、name = (EditText)findViewByld(R.id.password = (EditText)findViewByld(R.id.ed_name ); ed_pass );login = (Button)findViewByld(R.id.bt_login );myDBHelper = new MyDatabaseHelper(this , "user.db" , null ,1);login .setOnClickListener(new OnClickListener() Overridepublic void onClick(View arg0) /

10、 TODOAuto-generated method stubString usernameString =username .getText().toString();String passwordString =password .getText().toString();SQLiteDatabase db =myDBHelper .getWritableDatabase();newString sql= "select * from user where username=? and password=?" Cursor cursor=db.rawQuery(sql,

11、true )welcome_main );StringusernameString,passwordString);if (cursor.moveToFirst()= setContentView(R .1 ayout.cursor.close(); elseToast. makeText (getApplicationContext(),Toast. LENGTH_LONG).show(););5、实验现象、实验数据记录:(1)注册界面：(2).登录页面H EaBM 小込口mtc 凸 迈FM欢心登陆F-!0FM&TH 11«4Wl工(3).成功页面0wi寺品持顒kiMH.«»J13 A"'a * io 冊Qo电I® ® ® <j 1更0Tf蓼耐FT W徒录