Android实现登录界面记住密码的存储

android存储方式有很多种，在这里所用的存储方式是sharedpreferrences， 其采用了map数据结构来存储数据，以键值的方式存储，可以简单的读取与写入。所以比较适合我们今天做的这个项目。我们来看一下运行图：

一.布局界面

1.login_top.xml

 <?xml version="1.0" encoding="utf-8"?>
<relativelayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:padding="@dimen/activity_horizontal_margin"
 android:background="@drawable/logintop_roundbg">
 <edittext
  android:id="@+id/etname"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:ems="10"
  android:drawablepadding="10dp"
  android:background="@android:drawable/edit_text"
  android:drawableleft="@drawable/icon_user"
  android:hint="@string/etname">
  <requestfocus></requestfocus>
 </edittext>
 <edittext
  android:id="@+id/etpassword"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:layout_below="@id/etname"
  android:inputtype="textpassword"
  android:ems="10"
  android:drawablepadding="10dp"
  android:background="@android:drawable/edit_text"
  android:drawableleft="@drawable/icon_pass"
  android:hint="@string/etpassword">
  <requestfocus></requestfocus>
 </edittext>
 <checkbox
  android:id="@+id/cbremenber"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_below="@id/etpassword"
  android:text="@string/cbpass"/>
 <linearlayout
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:layout_below="@id/cbremenber">
  <button
   android:id="@+id/btnlogin"
   android:layout_width="0dp"
   android:layout_height="wrap_content"
   android:layout_weight="1"
   android:background="@drawable/btnselect"
   android:text="@string/btnlogin"
   android:onclick="login"/>
  <button
   android:id="@+id/btnregister"
   android:layout_width="0dp"
   android:layout_height="wrap_content"
   android:layout_weight="1"
   android:background="@drawable/btnselect"
   android:text="@string/btnregister"
   android:layout_marginleft="10dp"/>
 </linearlayout>
</relativelayout>

2.activity_main.xml

 <?xml version="1.0" encoding="utf-8"?>
<relativelayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:id="@+id/activity_main"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:background="@drawable/loginbg"
 tools:context="cn.edu.bzu.logindemo.mainactivity">

 <include layout="@layout/login_top"></include>

 <imageview
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:background="@drawable/deer"
  android:layout_alignparentbottom="true"
  android:layout_alignparentright="true"
  android:layout_alignparentend="true" />
</relativelayout>

3.activity_welcome.xml

 <?xml version="1.0" encoding="utf-8"?>
<relativelayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:id="@+id/activity_welcome"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 tools:context="cn.edu.bzu.logindemo.welcomeactivity">

 <textview
  android:id="@+id/tvwelcome"
  android:text="welcome you"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_alignparenttop="true"
  android:layout_centerhorizontal="true"
  android:layout_margintop="200dp"
  android:textsize="40sp"
   />
</relativelayout>

二.mainactivity

 public class mainactivity extends appcompatactivity {
 private edittext etname;
 private edittext etpassword;
 private sharedpreferences sharedpreferences;
 private checkbox cbremenber;
 @override
 protected void oncreate(bundle savedinstancestate) {
  super.oncreate(savedinstancestate);
  setcontentview(r.layout.activity_main);
  initviews();
  sharedpreferences=getsharedpreferences("remenberpassword", context.mode_private);
  boolean isremember=sharedpreferences.getboolean("remenberpassword",false);
  if(isremember) {
   string name = sharedpreferences.getstring("name", "");
   string password = sharedpreferences.getstring("password", "");
   etname.settext(name);
   etpassword.settext(password);
   cbremenber.setchecked(true);
  }
 }

 private void initviews() {
  etname=(edittext) findviewbyid(r.id.etname);
  etpassword=(edittext) findviewbyid(r.id.etpassword);
  cbremenber=(checkbox)findviewbyid(r.id.cbremenber);
 }

 public void login(view view){
  string name=etname.gettext().tostring();
  string password=etpassword.gettext().tostring();
  if("admin".equals(name)&&"123456".equals(password)){
   sharedpreferences.editor editor= sharedpreferences.edit();
   if(cbremenber.ischecked()){
    editor.putboolean("remenberpassword",true);
    editor.putstring("name",name);
    editor.putstring("password",password);
   }else {
    editor.clear();
   }
   editor.commit();
   intent intent=new intent(this,welcomeactivity.class);
   startactivity(intent);
   finish();
  }else {
   toast.maketext(this,"账号或密码有误",toast.length_long).show();

  }
 }
}

三.welcomeactivity

 public class welcomeactivity extends appcompatactivity {

 @override
 protected void oncreate(bundle savedinstancestate) {
  super.oncreate(savedinstancestate);
  setcontentview(r.layout.activity_welcome);
 }
}

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。