基于SQLite的Android登录APP

程序员文章站 2022-06-28 07:58:46

基于sqlite的android登录app该登录app主要包括三个模块：1、登录：用户选择登录方式、登录身份，输入账号密码，完成登录。2、忘记密码：用户输入新密码及验证码修改登录密码。3、个人信息：用...

基于sqlite的android登录app

该登录app主要包括三个模块：

1、登录：用户选择登录方式、登录身份，输入账号密码，完成登录。
2、忘记密码：用户输入新密码及验证码修改登录密码。
3、个人信息：用户完成登录后设置个人信息并显示。

使用控件：

1、单选按钮radiobutton：区分是密码登录还是验证码登录。
2、下拉框spinner：区分是个人用户还是公司用户。
3、编辑框edittext：输入手机号和密码（或验证码）。
4、复选框checkbox：判断是否记住密码。
5、相对布局relativelayout：界面的整体布局，方便将各个控件按照相对位置摆放。
6、框架布局framelayout：在框架布局中后面添加的子视图会把之前的子视图覆盖掉，一般用于需要重叠显示的场合。用于实现忘记密码按钮和密码输入框的叠加。

采用的存储方式

1、共享参数sharedpreferences：

是android的一个轻量级存储工具，采用的存储结构是key-value的键值对方式，类似于java的properties类，都是把key-value的键值对保存在配置文件中，不同的是properties的文件内容是key=value的形式，而sharedpreferences的存储介质是符合xml规范的配置文件。本案例中用于保存用户的账号和密码。

2、数据库sqlite：

是一个小巧的嵌入式数据库。本案例中用于存储用户的个人信息。

成果展示：

基于SQLite的Android登录APP

界面设计：

1. 登录界面

基于SQLite的Android登录APP

<?xml version="1.0" encoding="utf-8"?>
<relativelayout 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"
 tools:context=".loginactivity"
 android:paddingtop="10dp"
 android:padding="8dp">

 <radiogroup
 android:id="@+id/rg_login_way"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:orientation="horizontal"
 android:layout_margintop="20dp">

 <radiobutton
  android:id="@+id/rb_password"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:text="密码登录"
  android:textsize="25sp" />
 <radiobutton
  android:id="@+id/rb_checkcode"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:text="验证码登录"
  android:layout_marginleft="50dp"
  android:textsize="25sp" />

 </radiogroup>
 <textview
 android:id="@+id/tv_shenfen"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:text="我是："
 android:layout_below="@+id/rg_login_way"
 android:textsize="25sp"
 android:layout_margintop="40dp"
 android:textcolor="@color/black"
 android:layout_marginleft="30dp"
 android:layout_alignright="@+id/tv_phonenum"/>
 <spinner
 android:id="@+id/sp_shenfen"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_torightof="@+id/tv_shenfen"
 android:layout_alignbottom="@+id/tv_shenfen"

 android:spinnermode="dialog"/>

 <textview
 android:id="@+id/tv_phonenum"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_below="@+id/tv_shenfen"
 android:text="手机号码："
 android:textsize="25sp"
 android:textcolor="@color/black"
 android:layout_margintop="40dp"/>
 <edittext
 android:id="@+id/et_phone"
 android:layout_width="match_parent"
 android:layout_height="50dp"
 android:layout_alignbaseline="@id/tv_phonenum"
 android:layout_torightof="@+id/tv_phonenum"
 android:background="@drawable/eb_selector"
 android:textsize="25sp"
 android:hint="请输入手机号码"
 android:inputtype="number" />

 <textview
 android:id="@+id/tv_psw"
 android:layout_width="wrap_content"
 android:layout_height="40dp"
 android:text="登录密码："
 android:layout_below="@id/tv_phonenum"
 android:textsize="25sp"
 android:layout_margintop="40dp"
 android:textcolor="@color/black"/>
 <framelayout
 android:id="@+id/fm_psw"
 android:layout_width="match_parent"
 android:layout_height="50dp"
 android:layout_torightof="@id/tv_psw"
 android:layout_alignbottom="@+id/tv_psw"
 android:layout_alignleft="@+id/et_phone">

 <edittext
  android:id="@+id/et_psw"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:hint="请输入密码"
  android:textsize="25sp"
  android:background="@drawable/eb_selector" />
 <button
  android:id="@+id/btn_pswforget"
  android:layout_width="wrap_content"
  android:layout_height="match_parent"
  android:text="忘记密码"
  android:textsize="25sp"
  android:background="@color/darkgray"
  android:padding="10dp"
  android:layout_gravity="end"/>
 </framelayout>

 <checkbox
 android:id="@+id/cb_pswrmb"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_below="@+id/tv_psw"
 android:text="记住密码"
 android:textsize="25sp"
 android:layout_margintop="30dp"/>
 <button
 android:id="@+id/btn_login"
 android:layout_width="match_parent"
 android:layout_height="60dp"
 android:layout_below="@id/cb_pswrmb"
 android:text="登录"
 android:textsize="25sp"
 android:layout_margintop="30dp"
 android:background="@color/darkgray"/>


</relativelayout>

2.忘记密码界面

基于SQLite的Android登录APP

<?xml version="1.0" encoding="utf-8"?>
<relativelayout 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:padding="8dp"
 android:paddingtop="10dp"
 tools:context=".pswforgetactivity">
 <textview
 android:id="@+id/tv_newpsw"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:text="输入新密码："
 android:textcolor="@color/black"
 android:textsize="25sp"
 android:layout_margintop="20dp"/>
 <edittext
 android:id="@+id/et_newpsw"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_torightof="@+id/tv_newpsw"
 android:background="@drawable/eb_selector"
 android:layout_alignbaseline="@+id/tv_newpsw"
 android:hint="请输入新密码"
 android:textsize="25sp"
 android:inputtype="textpassword"
 />
 <textview
 android:id="@+id/tv_chknewpsw"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_margintop="40dp"
 android:text="确认新密码："
 android:layout_below="@+id/tv_newpsw"
 android:textsize="25sp"
 android:textcolor="@color/black"/>
 <edittext
 android:id="@+id/et_chknewpsw"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_torightof="@+id/tv_chknewpsw"
 android:layout_alignbaseline="@+id/tv_chknewpsw"
 android:background="@drawable/eb_selector"
 android:textsize="25sp"
 android:hint="请再次输入新密码"
 android:inputtype="textpassword"/>
 <textview
 android:id="@+id/tv_checkcode"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:text="验证码："
 android:layout_below="@+id/tv_chknewpsw"
 android:textsize="25sp"
 android:textcolor="@color/black"
 android:layout_margintop="40dp"/>
 <framelayout
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_torightof="@+id/tv_checkcode"
 android:layout_below="@+id/et_chknewpsw"
 android:layout_margintop="20dp">
 <edittext
  android:id="@+id/et_checkcode"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:textsize="25sp"
  android:hint="输入验证码"
  android:inputtype="number"
  android:background="@drawable/eb_selector"
  android:maxlines="1"/>
 <button
  android:id="@+id/btn_sendcheckcode"
  android:layout_width="wrap_content"
  android:layout_height="match_parent"
  android:layout_gravity="right"
  android:text="获取验证码"
  android:textsize="25sp"
  android:padding="10dp"
  android:textcolor="@color/black"
  android:background="@color/darkgray"/>

 </framelayout>

 <button
 android:id="@+id/btn_check"
 android:layout_width="match_parent"
 android:layout_height="60dp"
 android:layout_below="@id/tv_checkcode"
 android:text="确定"
 android:textsize="25sp"
 android:layout_margintop="30dp"
 android:background="@color/darkgray" />


</relativelayout>

3.个人信息填写界面

基于SQLite的Android登录APP

<?xml version="1.0" encoding="utf-8"?>
<relativelayout 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"
 tools:context=".sharedpreferencesactivity"
 android:padding="10dp">
 <textview
 android:id="@+id/tv_name"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:text="姓名："
 android:textsize="25sp"
 android:textcolor="@color/black"
 android:layout_margintop="20dp"/>
 <edittext
 android:id="@+id/et_name"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_torightof="@+id/tv_name"
 android:layout_alignbaseline="@+id/tv_name"
 android:background="@drawable/eb_selector"
 android:maxlines="1"/>

 <textview
 android:id="@+id/tv_age"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:text="年龄："
 android:textsize="25sp"
 android:textcolor="@color/black"
 android:layout_below="@+id/tv_name"
 android:layout_margintop="20dp"/>
 <edittext
 android:id="@+id/et_age"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_torightof="@+id/tv_age"
 android:layout_alignbaseline="@+id/tv_age"
 android:background="@drawable/eb_selector"
 android:maxlines="1"
 android:inputtype="number"/>
 <textview
 android:id="@+id/tv_height"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:text="身高："
 android:textsize="25sp"
 android:textcolor="@color/black"
 android:layout_below="@+id/tv_age"
 android:layout_margintop="20dp"/>
 <edittext
 android:id="@+id/et_height"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_torightof="@+id/tv_height"
 android:layout_alignbaseline="@+id/tv_height"
 android:background="@drawable/eb_selector"
 android:maxlines="1"
 android:inputtype="number"/>
 <textview
 android:id="@+id/tv_weight"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:text="体重："
 android:textsize="25sp"
 android:textcolor="@color/black"
 android:layout_below="@+id/tv_height"
 android:layout_margintop="20dp"/>
 <edittext
 android:id="@+id/et_weight"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_torightof="@+id/tv_weight"
 android:layout_alignbaseline="@+id/tv_weight"
 android:background="@drawable/eb_selector"
 android:maxlines="1"
 android:inputtype="number"/>
 <textview
 android:id="@+id/tv_married"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:text="婚否："
 android:layout_below="@+id/tv_weight"
 android:textsize="25sp"
 android:textcolor="@color/black"
 android:layout_margintop="20dp"/>
 <spinner
 android:id="@+id/sp_married"
 android:layout_width="match_parent"
 android:layout_height="40dp"
 android:spinnermode="dropdown"
 android:layout_torightof="@+id/tv_married"
 android:layout_alignbottom="@+id/tv_married"/>

 <button
 android:id="@+id/btn_save"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_below="@+id/tv_married"
 android:layout_margintop="20dp"
 android:background="@drawable/selector"
 android:text="保存"
 android:textsize="25sp"
 android:textcolor="@color/black"/>

</relativelayout>

4.个人信息显示界面

基于SQLite的Android登录APP

<?xml version="1.0" encoding="utf-8"?>
<relativelayout 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"
 tools:context=".sharedpreferencesactivity2">

 <textview
 android:id="@+id/tv_show"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_below="@+id/btn_delete"
 android:textsize="25sp"/>
 <button
 android:id="@+id/btn_delete"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:text="删除"
 android:textsize="25sp"/>

</relativelayout>

代码实现

userdbhelper

package com.example.helloworld;

import android.content.contentvalues;
import android.content.context;
import android.database.cursor;
import android.database.sqlite.sqlitedatabase;
import android.database.sqlite.sqliteopenhelper;
import android.util.log;


import androidx.annotation.nullable;
import androidx.core.app.navutils;

import java.util.arraylist;
import java.util.locale;

public class userdbhelper extends sqliteopenhelper {

 private static final string tag = "userdbhelper";
 private static final string db_name = "user.db"; //数据库名
 private static final int db_version = 1;  //数据库版本
 private static userdbhelper mhelper = null;
 private sqlitedatabase mdb = null;
 private static final string table_name = "user_info"; //表名

 private userdbhelper(context context){
 super(context,db_name,null,db_version);

 }

 private userdbhelper(context context,int version){
 super(context,db_name,null,version);
 }

 public static userdbhelper getinstance(context context,int version){
 if(version > 0 && mhelper == null){
  mhelper = new userdbhelper(context,version);
 }else if(mhelper == null){
  mhelper = new userdbhelper(context);
 }
 return mhelper;
 }

 public sqlitedatabase openreadlink(){
 if (mdb == null || !mdb.isopen()){
  mdb = mhelper.getreadabledatabase();
 }
 return mdb;
 }

 public sqlitedatabase openwritelink(){
 if (mdb == null || !mdb.isopen()){
  mdb = mhelper.getwritabledatabase();
  log.d(tag, "openwritelink: 打开了读数据库");
 }
 return mdb;
 }

 public void closelink(){
 if (mdb != null && mdb.isopen()){
  mdb.close();
  mdb = null;
 }
 }

 public string getdbname(){
 if(mhelper != null){
  return mhelper.getdatabasename();
 }else {
  return db_name;
 }
 }

 @override
 public void oncreate(sqlitedatabase db) {
 log.d(tag, "oncreate: 创建数据库");
 string drop_sql = "drop table if exists " + table_name + ";";
 db.execsql(drop_sql);
 string create_sql = "create table if not exists " + table_name + " ("
  + "_id integer primary key autoincrement not null,"
  + "name varchar not null,"
  + "age integer not null,"
  + "height long not null,"
  + "weight float not null,"
  + "married integer not null,"
  + "update_time varchar not null,"
  + "phone varchar not null,"
  + "password varchar not null"
  + ");";
 log.d(tag, "create_sql" + create_sql);
 db.execsql(create_sql);
 }

 @override
 public void onupgrade(sqlitedatabase db, int oldversion, int newversion) {
 log.d(tag, "onupgrade oldversion=" +oldversion+",newversion=" + newversion+"数据库新旧版本号");
 if (newversion > 1){
  string alter_sql = "alter table" + table_name + "add column" + "phone varchar;";
  log.d(tag, "alter_sql:" + alter_sql);
  db.execsql(alter_sql);
  alter_sql = "alter table" + table_name + "add column" + "password varchar;";
  log.d(tag, "alter_sql:" + alter_sql);
  db.execsql(alter_sql);
 }
 }

 public int delete(string condition){
 int count = mdb.delete(table_name,condition,null);
 return count;
 }
 public int deleteall(){
 int count = mdb.delete(table_name,"1=1",null);
 return count;
 }

 public long insert(userinfo info){
 arraylist<userinfo> infoarray = new arraylist<userinfo>();
 infoarray.add(info);
 return insert(infoarray);
 }

 public arraylist<userinfo>query(string condition) {
 string sql = string.format(locale.china,"select rowid,_id,name,age,height,weight,married,update_time," + "phone,password from %s where %s;", table_name,condition);
 log.d(tag, "query sql: " + sql);
 arraylist<userinfo> infoarray = new arraylist<userinfo>();
 cursor cursor = mdb.rawquery(sql, null);
 while (cursor.movetonext()) {
  userinfo info = new userinfo();
  info.rowid = cursor.getlong(0);
  info.xuhao = cursor.getint(1);
  info.name = cursor.getstring(2);
  info.age = cursor.getint(3);
  info.height = cursor.getlong(4);
  info.weight = cursor.getfloat(5);
  info.married = (cursor.getint(6) == 0) ? false : true;
  info.update_time = cursor.getstring(7);
  info.phone = cursor.getstring(8);
  info.password = cursor.getstring(9);
  infoarray.add(info);
 }
 cursor.close();
 return infoarray;
 }

 public long insert(arraylist<userinfo> infoarray) {
 long result = -1;
 for (int i = 0; i < infoarray.size(); i++) {
  userinfo info = infoarray.get(i);
  arraylist<userinfo> temparray = new arraylist<userinfo>();
  
  if (info.name != null && info.name.length() > 0) {
  string condition = string.format("name='%s'", info.name);
  temparray = query(condition);
  if (temparray.size() > 0) {
   update(info, condition);
   result = temparray.get(0).rowid;
   continue;
  }
  }
  
  if (info.phone != null && info.phone.length() > 0) {
  string condition = string.format("phone='%s'", info.phone);
  temparray = query(condition);
  if (temparray.size() > 0) {
   update(info, condition);
   result = temparray.get(0).rowid;
   continue;
  }
  }
  log.d(tag, "insert: 当前版本号"+mdb.getversion());

  contentvalues cv = new contentvalues();
  cv.put("name", info.name);
  cv.put("age", info.age);
  cv.put("height", info.height);
  cv.put("weight", info.weight);
  cv.put("married", info.married);
  cv.put("update_time", info.update_time);
  cv.put("phone", info.phone);
  cv.put("password", info.password);
  result = mdb.insert(table_name, "", cv);
  if (result == -1) {
  return result;
  }
 }
 return result;
 }

 public int update(userinfo info, string condition) {
 contentvalues cv = new contentvalues();
 cv.put("name", info.name);
 cv.put("age", info.age);
 cv.put("height", info.height);
 cv.put("weight", info.weight);
 cv.put("married", info.married);
 cv.put("update_time", info.update_time);
 cv.put("phone", info.phone);
 cv.put("password", info.password);
 // 执行更新记录动作，该语句返回记录更新的数目
 return mdb.update(table_name, cv, condition, null);
 }


 public int update(userinfo info) {
 return update(info, "rowid=" + info.rowid);
 }


 public userinfo querybyphone(string phone){
 userinfo info = null;
 arraylist<userinfo> infoarray = query(string.format("phone=%s",phone));
 if (infoarray.size() > 0 ){
  info = infoarray.get(0);
 }
 return info;
 }
}

userinfo

package com.example.helloworld;

public class userinfo {
 public long rowid;
 public int xuhao;
 public string name;
 public int age;
 public long height;
 public float weight;
 public boolean married;
 public string update_time;
 public string phone;
 public string password;

 public userinfo() {
 rowid = 0l;
 xuhao = 0;
 name = "";
 age = 0;
 height = 0l;
 weight = 0.0f;
 married = false;
 update_time = "";
 phone = "";
 password = "";
 }
}

loginactivity

package com.example.helloworld;

import androidx.annotation.nullable;
import androidx.appcompat.app.alertdialog;
import androidx.appcompat.app.appcompatactivity;

import android.content.context;
import android.content.dialoginterface;
import android.content.intent;
import android.content.sharedpreferences;
import android.graphics.rect;
import android.os.bundle;
import android.text.inputtype;
import android.text.method.passwordtransformationmethod;
import android.text.method.transformationmethod;
import android.util.log;
import android.view.view;
import android.widget.adapterview;
import android.widget.arrayadapter;
import android.widget.button;
import android.widget.checkbox;
import android.widget.compoundbutton;
import android.widget.edittext;
import android.widget.radiobutton;
import android.widget.radiogroup;
import android.widget.spinner;
import android.widget.toast;

import java.net.passwordauthentication;

public class loginactivity extends appcompatactivity implements view.onclicklistener {
 private edittext et_phone;
 private radiobutton rb_psw;
 private radiobutton rb_checkcode;
 private edittext et_psw;
 private button btn_pswforget;
 private string mpassword;
 private int mrequestcode; 
 private string mcheckcode;
 private int mtype;
 private string tag = "huahua";


 @override
 protected void oncreate(bundle savedinstancestate) {
 super.oncreate(savedinstancestate);
 setcontentview(r.layout.activity_login);
 rb_psw = findviewbyid(r.id.rb_password);
 rb_checkcode = findviewbyid(r.id.rb_checkcode);
 et_phone = findviewbyid(r.id.et_phone);
 et_psw = findviewbyid(r.id.et_psw);
 checkbox cb_pswforget = findviewbyid(r.id.cb_pswrmb);
 button btn_login = findviewbyid(r.id.btn_login);
 btn_pswforget = findviewbyid(r.id.btn_pswforget);
 btn_login.setonclicklistener(this);
 btn_pswforget.setonclicklistener(this);
 radiogroup rg = findviewbyid(r.id.rg_login_way);
 mpassword = et_psw.gettext().tostring();

 rg.setoncheckedchangelistener(new radiogroup.oncheckedchangelistener() {
  @override
  public void oncheckedchanged(radiogroup group, int checkedid) {
  radiobutton rb = findviewbyid(checkedid);
  log.i(tag, "oncheckedchanged: 密码登录"+ rb_psw.ischecked());
  log.i(tag, "oncheckedchanged: 验证码登录"+rb_checkcode.ischecked());
  if(rb_psw.ischecked()){
   et_psw.setinputtype(inputtype.type_text_variation_password | inputtype.type_class_text);
  }
  }
 });

 cb_pswforget.setoncheckedchangelistener(new compoundbutton.oncheckedchangelistener() {
  @override
  public void oncheckedchanged(compoundbutton buttonview, boolean ischecked) {

  }
 });

 arrayadapter<string> typeadapter = new arrayadapter<string>(this,r.layout.item_dropdown,typearray);
 typeadapter.setdropdownviewresource(r.layout.item_dropdown);
 spinner sp_type = findviewbyid(r.id.sp_shenfen);
 sp_type.setadapter(typeadapter);
 sp_type.setselection(0);
 sp_type.setprompt("选择你的登录身份：");
 sp_type.setonitemselectedlistener(new myonitemseclectedlistener());
 }
 private string[] typearray = {"个人用户","企业用户"};
 private class myonitemseclectedlistener implements adapterview.onitemselectedlistener{
 @override
 public void onitemselected(adapterview<?> parent, view view, int position, long id) {
  mtype = position;
 }

 @override
 public void onnothingselected(adapterview<?> parent) {

 }
 }

 @override
 protected void onactivityresult(int requestcode, int resultcode, @nullable intent data) {
 super.onactivityresult(requestcode, resultcode, data);
 if (requestcode == mrequestcode && data != null) {
  mpassword = data.getstringextra("newpsw");
 }
 }

 @override
 protected void onrestart() {
 et_psw.settext("");
 super.onrestart();
 }

 @override
 public void onclick(view v) {
 string phone = et_phone.gettext().tostring();
 switch (v.getid()){
  case r.id.btn_pswforget: {
  log.i(tag, "onclick: 点击了忘记密码");
  if (phone == null || phone.length() < 11) {
   toast.maketext(this, "请输入正确的手机号", toast.length_short).show();
   return;
  }
  if (rb_psw.ischecked()) {
   log.i(tag, "onclick: 进入忘记密码界面");
   intent intent = new intent(this, pswforgetactivity.class);
   intent.putextra("phone", phone);
   startactivityforresult(intent, mrequestcode);
  } else if (rb_checkcode.ischecked()) {
   mcheckcode = string.format("%06d", (int) (math.random() * 1000000 % 1000000));
   log.i(tag, "onclick: 发送验证码");
   alertdialog.builder builder = new alertdialog.builder(this);
   builder.settitle("请记住验证码！");
   builder.setmessage("手机号" + phone + "，本次验证码是：" + mcheckcode + "，请输入验证码");
   builder.setpositivebutton("确定", null);
   alertdialog alert = builder.create();
   alert.show();
  }
  }
  break;
  case r.id.btn_login: {
  if (phone == null || phone.length() < 11) {
   toast.maketext(this, "请输入正确的手机号！", toast.length_short).show();
   log.i(tag, "onclick: 验证密码");
   return;
  }
  if (rb_psw.ischecked()) {
   if (!et_psw.gettext().tostring().equals(mpassword) || et_psw.gettext().tostring().equals("")) {
   toast.maketext(this, "请输入正确的密码", toast.length_short).show();
   return;
   } else {
   loginsuccess();
   }
  } else if (rb_checkcode.ischecked()) {
   if (!et_psw.gettext().tostring().equals(mcheckcode)) {
   toast.maketext(this, "请输入正确的验证码", toast.length_short).show();
   return;
   } else {
   loginsuccess();
   }
  }
  }
 }
 }
 private void loginsuccess(){
 string desc = string.format("您的手机号码是%s，类型是%s。恭喜你通过登录验证，点击“确定”按钮返回上个页面",et_phone.gettext().tostring(),typearray[mtype]);
 alertdialog.builder builder = new alertdialog.builder(this);
 builder.settitle("登录成功");
 builder.setmessage(desc);
 builder.setpositivebutton("确定", new dialoginterface.onclicklistener() {
  @override
  public void onclick(dialoginterface dialog, int which) {
  intent intent = new intent(loginactivity.this,sharedpreferencesactivity.class);
  startactivity(intent);
  sharedpreferences sps = getsharedpreferences("login", context.mode_private);
  sharedpreferences.editor editor = sps.edit();
  editor.putstring("phone",et_phone.gettext().tostring());
  editor.putstring("password",et_psw.gettext().tostring());
  editor.apply();
  }
 });
 builder.setnegativebutton("取消",null);
 alertdialog alert = builder.create();
 alert.show();
 }
}

pswforgetactivity

package com.example.helloworld;

import androidx.appcompat.app.alertdialog;
import androidx.appcompat.app.appcompatactivity;

import android.app.activity;
import android.content.intent;
import android.os.bundle;
import android.text.inputtype;
import android.view.view;
import android.widget.adapterview;
import android.widget.edittext;
import android.widget.toast;

public class pswforgetactivity extends appcompatactivity implements view.onclicklistener {
 private edittext et_newpsw;
 private edittext et_chknewpsw;
 private edittext et_checkcode;
 private string mcheckcode;
 private string mphone;
 @override
 protected void oncreate(bundle savedinstancestate) {
 super.oncreate(savedinstancestate);
 setcontentview(r.layout.activity_psw_forget);
 et_newpsw = findviewbyid(r.id.et_newpsw);
 et_chknewpsw = findviewbyid(r.id.et_chknewpsw);
 et_checkcode = findviewbyid(r.id.et_checkcode);
 findviewbyid(r.id.btn_sendcheckcode).setonclicklistener(this);
 findviewbyid(r.id.btn_check).setonclicklistener(this);
 mphone = getintent().getstringextra("phone");
 et_newpsw.setinputtype(inputtype.type_text_variation_password | inputtype.type_class_text);
 et_chknewpsw.setinputtype(inputtype.type_text_variation_password | inputtype.type_class_text);
 }

 @override
 public void onclick(view v) {
 switch (v.getid()){
  case r.id.btn_sendcheckcode:
  if(mphone == null || mphone.length() < 11){
   toast.maketext(this,"请输入正确的手机号",toast.length_short).show();
   return;
  }
  mcheckcode = string.format("%06d",(int)(math.random()*1000000%1000000));
  alertdialog.builder builder = new alertdialog.builder(this);
  builder.settitle("请记住验证码");
  builder.setmessage("手机号"+mphone+"，本次验证码是"+mcheckcode+"，请输入验证码");
  builder.setpositivebutton("确定",null);
  alertdialog alertdialog = builder.create();
  alertdialog.show();
  case r.id.btn_check:
  string newpsw = et_newpsw.gettext().tostring();
  string chknewpsw = et_chknewpsw.gettext().tostring();
  if(newpsw == null || newpsw.length() < 6 || chknewpsw == null || chknewpsw.length() < 6){
   toast.maketext(this,"请输入正确的新密码",toast.length_short).show();
   return;
  }else if(!newpsw.equals(chknewpsw)){
   toast.maketext(this,"两次输入的新密码不一致",toast.length_short).show();
   return;
  }else if(!et_checkcode.gettext().tostring().equals(mcheckcode)){
   toast.maketext(this,"请输入正确的验证码",toast.length_short).show();
   return;
  }else {
   toast.maketext(this,"密码修改成功",toast.length_short).show();
   intent intent = new intent();
   intent.putextra("newpsw",newpsw);
   setresult(activity.result_ok,intent);
   finish();
  }
 }
 }
}

infowriteactivity

package com.example.helloworld;

import androidx.appcompat.app.appcompatactivity;

import android.content.context;
import android.content.intent;
import android.content.sharedpreferences;
import android.database.sqlite.sqlitedatabase;
import android.os.bundle;
import android.util.log;
import android.view.view;
import android.widget.adapterview;
import android.widget.arrayadapter;
import android.widget.edittext;
import android.widget.spinner;
import android.widget.toast;

public class infowriteactivity extends appcompatactivity implements view.onclicklistener {
 private static final string tag = "huahua";
 private userdbhelper mhelper;
 private edittext et_name;
 private edittext et_age;
 private edittext et_height;
 private edittext et_weight;
 private boolean married = false;
 private string phone;
 private string password;

 @override
 protected void oncreate(bundle savedinstancestate) {
 super.oncreate(savedinstancestate);
 setcontentview(r.layout.activity_shared_preferences);
 et_name = findviewbyid(r.id.et_name);
 et_age = findviewbyid(r.id.et_age);
 et_height = findviewbyid(r.id.et_height);
 et_weight = findviewbyid(r.id.et_weight);
 findviewbyid(r.id.btn_save).setonclicklistener(this);

 sharedpreferences sps = getsharedpreferences("login",context.mode_private);
 sharedpreferences.editor editor = sps.edit();
 phone = sps.getstring("phone","");
 password = sps.getstring("password","");


 arrayadapter<string> typeadapter = new arrayadapter<string>(this, r.layout.item_dropdown, typearray);
 typeadapter.setdropdownviewresource(r.layout.item_dropdown);
 spinner sp_married = findviewbyid(r.id.sp_married);
 sp_married.setadapter(typeadapter);
 sp_married.setprompt("请选择婚姻状况");
 sp_married.setselection(0);
 sp_married.setonitemselectedlistener(new typeselectedlistener());

 


 }

 private string[] typearray = {"未婚", "已婚"};

 class typeselectedlistener implements adapterview.onitemselectedlistener {
 public void onitemselected(adapterview<?> arg0, view arg1, int arg2, long arg3) {
  married = (arg2 == 0) ? false : true;
 }

 public void onnothingselected(adapterview<?> arg0) {
 }
 }

 @override
 protected void onstart() {
 super.onstart();
 sqlitedatabase mdb = getapplicationcontext().openorcreatedatabase("user.db", context.mode_private, null);
 mhelper = userdbhelper.getinstance(this, 1);
 mhelper.openwritelink();
 }

 @override
 protected void onstop() {
 super.onstop();
 mhelper.closelink();
 }

 @override
 public void onclick(view v) {
 if (v.getid() == r.id.btn_save) {
  string name = et_name.gettext().tostring();
  string age = et_age.gettext().tostring();
  string height = et_height.gettext().tostring();
  string weight = et_weight.gettext().tostring();
  if (name == null || name.length() <= 0) {
  showtoast("请先填写姓名");
  return;
  }
  if (age == null || age.length() <= 0) {
  showtoast("请先填写年龄");
  return;
  }
  if (height == null || height.length() <= 0) {
  showtoast("请先填写身高");
  return;
  }
  if (weight == null || weight.length() <= 0) {
  showtoast("请先填写体重");
  return;
  }

  userinfo info = new userinfo();

  info.name = name;
  info.age = integer.parseint(age);
  info.height = long.parselong(height);
  info.weight = float.parsefloat(weight);
  info.married = married;
  info.phone = phone;
  info.password = password;

  //info.update_time = dateutil.getcurdatestr("yyyy-mm-dd hh:mm:ss");
  info.update_time = dateutil.getnowdate(dateutil.datepattern.all_time);
  log.d(tag, "onclick: 手机号" + info.phone+info.password+info.name+info.update_time+info.married);
  mhelper.insert(info);
  intent intent = new intent(infowriteactivity.this, inforeadactivity.class);
  startactivity(intent);
  showtoast("数据已写入sqlite数据库");
 }
 }

 private void showtoast(string desc) {
 toast.maketext(this, desc, toast.length_short).show();
 }

 public static void starthome(context mcontext) {
 intent intent = new intent(mcontext, infowriteactivity.class);
 mcontext.startactivity(intent);
 }
}

inforeadactivity

package com.example.helloworld;

import androidx.appcompat.app.appcompatactivity;

import android.content.context;
import android.content.intent;
import android.content.sharedpreferences;
import android.database.sqlite.sqlitedatabase;
import android.os.bundle;
import android.util.log;
import android.view.view;
import android.widget.adapterview;
import android.widget.arrayadapter;
import android.widget.edittext;
import android.widget.spinner;
import android.widget.toast;

public class infowriteactivity extends appcompatactivity implements view.onclicklistener {
 private static final string tag = "huahua";
 private userdbhelper mhelper;
 private edittext et_name;
 private edittext et_age;
 private edittext et_height;
 private edittext et_weight;
 private boolean married = false;
 private string phone;
 private string password;

 @override
 protected void oncreate(bundle savedinstancestate) {
 super.oncreate(savedinstancestate);
 setcontentview(r.layout.activity_shared_preferences);
 et_name = findviewbyid(r.id.et_name);
 et_age = findviewbyid(r.id.et_age);
 et_height = findviewbyid(r.id.et_height);
 et_weight = findviewbyid(r.id.et_weight);
 findviewbyid(r.id.btn_save).setonclicklistener(this);

 sharedpreferences sps = getsharedpreferences("login",context.mode_private);
 sharedpreferences.editor editor = sps.edit();
 phone = sps.getstring("phone","");
 password = sps.getstring("password","");


 arrayadapter<string> typeadapter = new arrayadapter<string>(this, r.layout.item_dropdown, typearray);
 typeadapter.setdropdownviewresource(r.layout.item_dropdown);
 spinner sp_married = findviewbyid(r.id.sp_married);
 sp_married.setadapter(typeadapter);
 sp_married.setprompt("请选择婚姻状况");
 sp_married.setselection(0);
 sp_married.setonitemselectedlistener(new typeselectedlistener());
 }

 private string[] typearray = {"未婚", "已婚"};

 class typeselectedlistener implements adapterview.onitemselectedlistener {
 public void onitemselected(adapterview<?> arg0, view arg1, int arg2, long arg3) {
  married = (arg2 == 0) ? false : true;
 }

 public void onnothingselected(adapterview<?> arg0) {
 }
 }

 @override
 protected void onstart() {
 super.onstart();
 sqlitedatabase mdb = getapplicationcontext().openorcreatedatabase("user.db", context.mode_private, null);
 mhelper = userdbhelper.getinstance(this, 1);
 mhelper.openwritelink();
 }

 @override
 protected void onstop() {
 super.onstop();
 mhelper.closelink();
 }

 @override
 public void onclick(view v) {
 if (v.getid() == r.id.btn_save) {
  string name = et_name.gettext().tostring();
  string age = et_age.gettext().tostring();
  string height = et_height.gettext().tostring();
  string weight = et_weight.gettext().tostring();
  if (name == null || name.length() <= 0) {
  showtoast("请先填写姓名");
  return;
  }
  if (age == null || age.length() <= 0) {
  showtoast("请先填写年龄");
  return;
  }
  if (height == null || height.length() <= 0) {
  showtoast("请先填写身高");
  return;
  }
  if (weight == null || weight.length() <= 0) {
  showtoast("请先填写体重");
  return;
  }

  userinfo info = new userinfo();

  info.name = name;
  info.age = integer.parseint(age);
  info.height = long.parselong(height);
  info.weight = float.parsefloat(weight);
  info.married = married;
  info.phone = phone;
  info.password = password;

  info.update_time = dateutil.getnowdate(dateutil.datepattern.all_time);
  log.d(tag, "onclick: 手机号" + info.phone+info.password+info.name+info.update_time+info.married);
  mhelper.insert(info);
  intent intent = new intent(infowriteactivity.this, inforeadactivity.class);
  startactivity(intent);
  showtoast("数据已写入sqlite数据库");
 }
 }

 private void showtoast(string desc) {
 toast.maketext(this, desc, toast.length_short).show();
 }

 public static void starthome(context mcontext) {
 intent intent = new intent(mcontext, infowriteactivity.class);
 mcontext.startactivity(intent);
 }
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。

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