Android ' Remember password ' feature

1. Post-run interface diagram

2. Main code:

2.1 Activity_main.xml (2 TextView 2 EditText 1 checkboxes and 1 buttons):

1<TextView2Android:id= "@+id/tvaccount"3Android:layout_width= "Wrap_content"4android:layout_height= "Wrap_content"5Android:layout_alignbaseline= "@+id/etaccount"6Android:layout_alignbottom= "@+id/etaccount"7android:text= "@string/tvaccount"8Android:textappearance= "? Android:attr/textappearancelarge"/>9 Ten<EditText OneAndroid:id= "@+id/etaccount" AAndroid:layout_width= "Wrap_content" -android:layout_height= "Wrap_content" -Android:layout_alignparentright= "true" theAndroid:layout_alignparenttop= "true" -android:layout_margintop= "18DP" -android:ems= "Ten"/> -  +<EditText -Android:id= "@+id/etpass" +Android:layout_width= "Wrap_content" Aandroid:layout_height= "Wrap_content" atAndroid:layout_alignbottom= "@+id/tvpass" -android:layout_alignleft= "@+id/etaccount" -Android:ems= "10" -Android:inputtype= "Textpassword" > -  -<requestfocus/> in</EditText> -  to<TextView +Android:id= "@+id/tvpass" -Android:layout_width= "Wrap_content" theandroid:layout_height= "Wrap_content" *android:layout_alignleft= "@+id/tvaccount" $android:layout_below= "@+id/etaccount"Panax Notoginsengandroid:layout_margintop= "29DP" -android:text= "@string/tvpass" theAndroid:textappearance= "? Android:attr/textappearancelarge"/> +  A<CheckBox theAndroid:id= "@+id/cbrempass" +Android:layout_width= "Wrap_content" -android:layout_height= "Wrap_content" $android:layout_alignleft= "@+id/tvpass" $android:layout_below= "@+id/etpass" -android:layout_margintop= "20DP" -android:text= "@string/cbrempass"/> the  -<ButtonWuyiAndroid:id= "@+id/btnlogin" theAndroid:layout_width= "Wrap_content" -android:layout_height= "Wrap_content" WuAndroid:layout_alignbottom= "@+id/cbrempass" -android:layout_alignright= "@+id/etpass" Aboutandroid:text= "@string/btnlogin"/>

Activity_main.xml

2.2 Mainactivity.java

The main use of sharedpreferences to save the password

2.2.1 Definition Sharedpreferences

Private null;

2.2.2 Button click-to-Listen event

1 Private voidSetlistener () {2         //TODO auto-generated Method Stub3Btnlogin.setonclicklistener (NewOnclicklistener () {4              Public voidOnClick (View v) {5                 //TODO auto-generated Method Stub6                 //Determines whether the check box is selected7                 if(cbrempass.ischecked ()) {8Msettings =getsharedpreferences (Prefs_name, mode_private);9Editor edit =Msettings.edit ();Ten                     //Mark OneEdit.putboolean ("Iskeep",true); A                     //Record User name -Edit.putstring ("username", Etaccount.gettext (). toString ()); -Edit.putstring ("Password", Etpass.gettext (). toString ()); the edit.commit (); -}Else{ -Msettings =getsharedpreferences (Prefs_name, mode_private); -Editor edit =Msettings.edit (); +                     //Mark -Edit.putboolean ("Iskeep",true); +                     //Record User name AEdit.putstring ("username", "" "); atEdit.putstring ("Password", "" "); - edit.commit (); -                 }     -             } -         }); -}

Listener Events for button buttons

2.2.3 The second time the key code to get the saved password is started

1 Private voidGetData () {2         //TODO auto-generated Method Stub3Msettings =getsharedpreferences (Prefs_name, mode_private);4         if(Msettings.getboolean ("Iskeep",false)){5Etaccount.settext (msettings.getstring ("username", "" "));6Etpass.settext (msettings.getstring ("Password", "" "));7}Else{8Etaccount.settext ("");9Etpass.settext ("");Ten         } One}

get the key code for the password

2.2.4 a reference to the GetData function is placed in the OnCreate method and Onresume method

3. Demo

Https://github.com/cnfanhua/A-RemPass

Android ' Remember password ' feature