Android store data to local files

<span id="Label3"></p><p><p>XML file</p></p><pre class="brush:xml;toolbar:false"><linearlayout xmlns:android= "http://schemas.android.com/apk/res/android"     xmlns: tools= "http://schemas.android.com/tools"     android:layout_width= "match_parent"      android:layout_height= "match_parent"     android:orientation= "vertical"     android:padding= "5dp"  >    <EditText         android:id= "@+id/qqnum"         android: Layout_width= "fill_parent"         android:layout_height= "wrap_content"        android:hint= "please Enter qq"         Android:inputtype= "number"         android:textsize= "20dp"          />    <EditText          android:id= "@+id/pass"         android:layout_width= "fill_parent"          android:layout_height= "wrap_content"          android:hint= "please Enter the password"         android:inputtype= " Textpassword "        android:textsize=" 20DP "                 />    < Checkbox         android:id= "@+id/rem"          android:layout_width= "wrap_content"          android:layout_height= "wrap_content"         android:text= "remember password"                  />     <button          android:id= "@+id/login"          Android:layout_width= "wrap_content"         android:layout_height= "wrap _content "        android:text=" Login "/></linearlayout></pre><p><p> Utils <br> </p> </p><pre class="brush:java;toolbar:false">package com.example.android22filelogin;import java.io.bufferedreader;import  Java.io.fileinputstream;import java.io.filenotfoundexception;import java.io.fileoutputstream;import  java.io.InputStreamReader;import java.util.HashMap;import java.util.Map;import  Android.text.textutils;public class utils {public static boolean saveuserinfo ( String username,string pwd) {string data=username+ "# #" +pwd; String path= "/data/data/com.example.android22filelogin/data.txt"; try {fileoutputstream out=new  fileoutputstream (path); out.write (data.getbytes ()); out.flush (); out.close (); return true;}  catch  (exception e)  {e.printstacktrace ();} return false;} Public static map<string,string> getuserinfo () {string path= "/data/data/ Com.example.android22filelogin/data.txt "; Try {bufferedreader reader=new bufferedreader (new  inputstreamreader (new&nbsp FileInputStream (path)); String data=reader.readline (); If (! Textutils.isempty (data) {string [] datas=data.split ("# #"); map<string, string> userinfo=new hashmap<string, string> (); userinfo.put (" Number ",  datas[0]); userinfo.put (" pwd ",  datas[1]); return userinfo;}}  catch  (exception e)  {e.printstacktrace ();} return null;}}</pre><p><p> Activity </p> </p><pre class="brush:java;toolbar:false">public class mainactivity extends activity implements onclicklistener { private edittext qqnum,pwd;private checkbox rem;private button but;      @Override     protected void oncreate (bundle savedinstancestate)  {        super.oncreate (savedinstancestate);         setcontentview (r.layout.activity_main);         qqnum= (EditText) Findviewbyid (r.id.qqnum);         pwd= ( EditText) Findviewbyid (r.id.pass);         rem= (CheckBox) Findviewbyid ( R.id.rem)         but= (Button) Findviewbyid (r.id.login);         but.setonclicklistener (this);         //echo Data    &nbsP;    map<string, string> userinfo=utils.getuserinfo ();         if (userinfo!=null)         {         qqnum.settext (userinfo.get ("number"));         pwd.settext (userinfo.get ("pwd"));        }     } @Overridepublic  void onclick (view v)  {//remember the number and password String num=qqnum.gettext ( ). toString (); String password=pwd.gettext (). toString (); if (textutils.isempty (num) | | Textutils.isempty (PASSWORD)) {toast.maketext (this,  "user name or password cannot be empty",  toast.length_long). show (); return;} Determines whether to remember the password if (rem.ischecked ()) {boolean issuccess=utils.saveuserinfo (num, password); Toast.maketext (this, issuccess+ "",  toast.length_long). show ();} Login successful}}</pre><p><p><br></p></p><p><p>This article is from the "java white battlefield" blog, Be sure to keep this source http://8023java.blog.51cto.com/10117207/1664699</p></p><p><p>Android store data to local files</p></p></span>