10.28

概述<?xmlversion="1.0"encoding="utf-8"?><LinearLayoutxmlns:android="http://schemas.android.com/apkes/android"xmlns:app="http://schemas.android.com/apkes-auto"xmlns:tools="http://schemas.a

<?xml version="1.0" enCoding="utf-8"?><linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID"    xmlns:app="http://schemas.androID.com/apk/res-auto"    xmlns:tools="http://schemas.androID.com/tools"    androID:layout_wIDth="match_parent"    androID:layout_height="match_parent"    androID:orIEntation="vertical"    tools:context=".MainActivity" >    <TextVIEw        androID:ID="@+ID/textVIEw"        androID:layout_wIDth="match_parent"        androID:layout_height="40dp"        androID:background="#00BCD4"        androID:gravity="center"        androID:text="学生注册页面"        androID:textSize="30sp"        androID:textStyle="bold" />    <linearLayout        androID:layout_wIDth="match_parent"        androID:layout_height="match_parent"        androID:orIEntation="vertical">        <tableLayout            androID:layout_wIDth="match_parent"            androID:layout_height="wrap_content"            androID:layout_margin="50dp">            <tableRow                androID:layout_wIDth="match_parent"                androID:layout_height="match_parent"                androID:gravity="center">                <TextVIEw                    androID:ID="@+ID/textVIEw3"                    androID:layout_wIDth="wrap_content"                    androID:layout_height="wrap_content"                    androID:text="姓名：" />                <EditText                    androID:ID="@+ID/e_name"                    androID:layout_wIDth="wrap_content"                    androID:layout_height="wrap_content"                    androID:ems="10"                    androID:inputType="textPersonname" />            </tableRow>            <tableRow                androID:layout_wIDth="match_parent"                androID:layout_height="match_parent"                androID:gravity="center">                <TextVIEw                    androID:ID="@+ID/textVIEw4"                    androID:layout_wIDth="wrap_content"                    androID:layout_height="wrap_content"                    androID:text="年龄：" />                <EditText                    androID:ID="@+ID/e_age"                    androID:layout_wIDth="wrap_content"                    androID:layout_height="wrap_content"                    androID:ems="10"                    androID:inputType="textPersonname" />            </tableRow>        </tableLayout>        <button            androID:ID="@+ID/button"            androID:layout_wIDth="150dp"            androID:layout_height="wrap_content"            androID:layout_gravity="center"            androID:layout_margin="100dp"            androID:gravity="center"            androID:text="注册"            androID:textSize="20sp"            androID:textStyle="bold" />    </linearLayout></linearLayout>package com.example.blj;import androIDx.appcompat.app.AppCompatActivity;import androID.content.ContentValues;import androID.database.sqlite.sqliteDatabase;import androID.os.Bundle;import androID.vIEw.VIEw;import androID.Widget.button;import androID.Widget.EditText;import androID.Widget.TextVIEw;public class MainActivity extends AppCompatActivity   {    private button button;    private TextVIEw name;    private EditText age;    @OverrIDe    protected voID onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentVIEw(R.layout.activity_main);        button = (button)findVIEwByID(R.ID.button);        name = (TextVIEw)findVIEwByID(R.ID.e_name);        age = (EditText) findVIEwByID(R.ID.e_age);        button.setonClickListener(new VIEw.OnClickListener() {            @OverrIDe            public voID onClick(VIEw vIEw) {                insert(name.getText().toString(),age.getText().toString());            }        });    }    public voID insert(String name,String age){        Student helper = new Student(this);        sqliteDatabase db = helper.getWritableDatabase();        ContentValues values = new ContentValues();        values.put("name",name);        values.put("age",age);        long ID = db.insert("stu",null,values);        db.close();    }}package com.example.blj;import androID.content.Context;import androID.database.sqlite.sqliteDatabase;import androID.database.sqlite.sqliteOpenHelper;import androIDx.annotation.Nullable;public class Student extends sqliteOpenHelper {    public Student(@Nullable Context context) {        super(context, "student.db", null, 3);    }    @OverrIDe    public voID onCreate(sqliteDatabase db) {        String sql = "CREATE table stu(s_ID INTEGER PRIMARY KEY autoINCREMENT,name VARCHAR(20),age INTEGER)";        db.execsql(sql);    }    @OverrIDe    public voID onUpgrade(sqliteDatabase db, int i, int i1) {        String sql = "CREATE table bj(b_ID INTEGER PRIMARY KEY autoINCREMENT,b_name VARCHAR(20))";        db.execsql(sql);    }}

 

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