Android implementation remembers user name and password features _android

The Android implementation remembers that the user name and password functions are implemented through sharedpreference storage. Create a check button to handle event handling through a button's no selection. If the button selects the information that stores the account number and password. If the button is not selected, empty the account and password information.

Results Demo:

Source code Download Address:

Https://github.com/GXS1225/Android ————-. git

Analysis

(1) Decide whether to enter the account number and password

  if (Name.trim (). Equals ("")) {
        Toast.maketext (this,) Please enter your username! ", Toast.length_short). Show ();
        return;
      }
      if (Pswd.trim (). Equals ("")) {
        Toast.maketext (this,) Please enter your password! ", Toast.length_short). Show ();
        return;
      }

(2) Define a CheckBox in Layout_main.xml for event handling

Via
Boolean checkboxlogin = checkbox.ischecked ();
      button is selected, the next entry will show the account number and password             
      if (checkboxlogin)
      {
          Editor Editor = Sp.edit ();
          Editor.putstring ("uname", name);
          Editor.putstring ("upswd", pswd);
          Editor.putboolean ("Auto", true);
          Editor.commit ();
      }
      button is selected, empty the account and password, the next entry will show the account number and password       
      else      
      { 
        Editor Editor = Sp.edit ();
        Editor.putstring ("uname", null);
        Editor.putstring ("upswd", null);
        Editor.putboolean ("Auto", false);
        Editor.commit ();
        }

(3) Storage implementation of Sharedpreference

Define
Sharedpreferences sp = null first; 

SP = this.getsharedpreferences ("userinfo", context.mode_private);
Operations on uname and UPSWD
 if (Sp.getboolean ("Checkboxboolean", false))
      {uname.settext (
        sp.getstring ("uname"), NULL));
        Upswd.settext (sp.getstring ("upswd", null)); 
        Checkboxbutton.setchecked (true);

      

(4) Jump to Content.java interface

Intent Jump
Intent Intent = new Intent (welcome.this,content.class);
StartActivity (intent);
Finish ();

Steps:

First to write a landing interface: Layout_main.xml

<?xml version= "1.0" encoding= "Utf-8"?> <linearlayout xmlns:android= "http://schemas.android.com/apk/res/" 
  Android "Android:layout_width=" Match_parent "android:layout_height=" match_parent "android:orientation=" vertical " android:background= "#ADD8E6" > <relativelayout android:id= "@+id/login_div android:layout_width=" Fill_pare NT "android:layout_height=" 221DP "android:layout_margin=" 15dip "android:background=" @drawable/btn_bg "Andr oid:padding= "15dip" > <textview android:id= "@+id/login_user_input" android:layout_width= "Wrap_conte" NT "android:layout_height=" Wrap_content "android:layout_alignparenttop=" true "android:layout_margin=" 5DP
      "android:text=" @string/user "android:textsize=" 16DP "android:typeface=" sans "/> <edittext
      Android:id= "@+id/user_input" android:layout_width= "fill_parent" android:layout_height= "Wrap_content" android:layout_below= "@id/login_User_input "android:background=" @android:d rawable/editbox_background "android:inputtype=" text android:s Ingleline= "true"/> <textview android:id= @+id/login_pass_input "android:layout_width=" wrap_content 
      "Android:layout_height=" wrap_content "android:layout_below=" @id/user_input "android:layout_margin=" 5DP "
      android:text= "@string/pass" android:textsize= "16DP" android:typeface= "sans"/> <edittext
      Android:id= "@+id/pass_input" android:layout_width= "fill_parent" android:layout_height= "Wrap_content" android:layout_below= "@id/login_pass_input" android:background= "@android:d rawable/editbox_background" Android:
      Inputtype= "Textpassword" android:singleline= "true"/> <checkbox android:id= "@+id/checkboxlogin" Android:layout_width= "Wrap_content" android:layout_height= "wrap_content" android:layout_alignleft= "@+id/pas" S_input "Android:lAyout_alignparentbottom= "true" android:text= "@string/no_user"/> <button android:id= "@+id/new_user" Android:layout_width= "Wrap_content" android:layout_height= "Wrap_content" Android:layout_alignparentbott Om= "true" android:layout_alignright= "@+id/pass_input" android:layout_marginright= "28DP" android:onclick= "To_title" android:text= "@string/new_user"/> </RelativeLayout> <linearlayout android:layout _width= "Match_parent" android:layout_height= "match_parent" android:orientation= "vertical" > <textvie W android:layout_width= "402DP" android:layout_height= "51DP" android:layout_marginleft= "50DP" a ndroid:background= "@drawable/gxs_ziti"/> <button android:layout_width= "120DP" android:layout_he ight= "120DP" android:onclick= "to_fruist" android:background= "@drawable/gxs2" Android:layout_marginle

ft= "80DP"/>

   </LinearLayout> </LinearLayout>

 

Welcome.java

Package com.gxs.login;
Import COM.EXAMPLE.LOGIN.R;
Import com.gxs.listview.*;
Import Android.os.Bundle;
Import android.preference.Preference;
Import android.app.Activity;
Import Android.app.SearchManager.OnCancelListener;
Import Android.content.Context;
Import android.content.Intent;
Import android.content.SharedPreferences;
Import Android.content.SharedPreferences.Editor;
Import Android.util.Log;
Import Android.view.Menu;
Import Android.view.View;
Import Android.view.View.OnClickListener;
Import Android.widget.Button;
Import Android.widget.CheckBox;
Import Android.widget.EditText;
Import Android.widget.Toast;
  public class Welcome extends activity implements onclicklistener{private edittext = null;
  Private EditText upswd = null;
  Private CheckBox Checkboxbutton = null;
  Private Button login = null; 
  Sharedpreferences sp = null;
    @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview (R.layout.layout_main);
    SP = this.getsharedpreferences ("userinfo", context.mode_private);

  Init ();
    public void init () {uname = (edittext) Findviewbyid (r.id.user_input);
    UPSWD = (edittext) Findviewbyid (r.id.pass_input);
    Checkboxbutton = (CheckBox) Findviewbyid (R.id.checkboxlogin);
    Login = (Button) Findviewbyid (R.id.new_user);
        if (Sp.getboolean ("Checkboxboolean", False)) {Uname.settext (sp.getstring ("uname", null)); 
        Upswd.settext (sp.getstring ("upswd", null));

      Checkboxbutton.setchecked (TRUE);
  } login.setonclicklistener (this);
      @Override public void OnClick (View v) {if (v = = login) {String name = Uname.gettext (). toString ();
      String pswd = Upswd.gettext (). toString (); if (Name.trim (). Equals ("")) {Toast.maketext (this,) Please enter your username!
        ", Toast.length_short). Show ();
      Return } if (Pswd.trim (). Equals ("")) {Toast.maketext (this,) Please enter your password! ", Toast.length_short). Show ();
      Return
      Boolean checkboxlogin = checkboxbutton.ischecked ();
          if (checkboxlogin) {Editor Editor = Sp.edit ();
          Editor.putstring ("uname", name);
          Editor.putstring ("upswd", pswd);
          Editor.putboolean ("Checkboxboolean", true);
      Editor.commit ();
        else {Editor Editor = Sp.edit ();
        Editor.putstring ("uname", null);
        Editor.putstring ("upswd", null);
        Editor.putboolean ("Checkboxboolean", false);
        Editor.commit ();
      //intent Jump Intent intent=new Intent (welcome.this,content.class);
      StartActivity (Intent);
    Finish ();

 }
  }

}

Content.java

Package Com.gxs.listview;
Import java.util.List;
Import COM.EXAMPLE.LOGIN.R;
Import com.gxs.*;
Import android.app.Activity;
Import Android.os.Bundle;
Import Android.widget.ArrayAdapter;
Import Android.widget.ListView;
public class Content extends activity{
  private ListView listview_fruits;  
  @Override
  protected void onCreate (Bundle savedinstancestate) {
    //TODO auto-generated method stub
    Super.oncreate (savedinstancestate);
    Setcontentview (r.layout.content);

  }

Content.xml

<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:paddingbottom= "@dimen/activity_vertical_margin"
  android:paddingleft= "@dimen/activity_ Horizontal_margin "
  android:paddingright=" @dimen/activity_horizontal_margin "
  android:paddingtop=" @dimen /activity_vertical_margin "
  tools:context=". Welcome " 
  >

  <textview
    android:id=" @+id/textview1 "
    android:layout_width=" Wrap_content "
    android:layout_height= "Wrap_content" "
    android:text=" content "
    android:textappearance="? android:attr/ Textappearancelarge "/>

</LinearLayout>

The above is the entire content of this article, I hope to help you learn, but also hope that we support the cloud habitat community.