Android Development Complete Login Interface Data save Echo Operation instance _android

This article describes the Android development of the completion of the landing interface data saving echo operation. Share to everyone for your reference, specific as follows:

Loginactivity.java:

Package com.example.login; 
Import Java.util.Map; 
Import android.app.Activity; 
Import Android.os.Bundle; 
Import Android.text.TextUtils; 
Import Android.view.Menu; 
Import Android.view.View; 
Import Android.widget.Button; 
Import Android.widget.CheckBox; 
Import Android.widget.EditText; 
Import Android.widget.Toast; 
Import Com.example.login.service.FileService; 
  public class Loginactivity extends activity {public EditText edit_name,edit_pass; 
  Public Button Btn_login; 
  Public CheckBox Box_remeber; 
  Public Fileservice Fileservice; 
    @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); 
    Setcontentview (R.layout.activity_login); 
    Fileservice=new Fileservice (this); 
    Edit_name= (EditText) Findviewbyid (r.id.edit_name); 
    Edit_pass= (EditText) Findviewbyid (R.id.edit_pass); 
    Btn_login= (Button) Findviewbyid (R.id.btn_login); 
    Box_remeber= (CheckBox) Findviewbyid (R.id.cbx_remember); Btn_login.setonclickliStener (New Myonclicklistener ()); 
    Map<string, string> map=fileservice.readfile ("Private.txt"); 
      if (map!=null) {Edit_name.settext (Map.get ("name")); 
    Edit_pass.settext (Map.get ("Pass")); } @Override Public boolean Oncreateoptionsmenu (Menu menu) {//Inflate the menu; This adds items to the AC 
    tion Bar if it is present. 
    Getmenuinflater (). Inflate (R.menu.login, menu); 
  return true;  Class Myonclicklistener implements view.onclicklistener{@Override public void OnClick (View v) {int 
      Id=v.getid (); 
        Switch (ID) {case r.id.btn_login:string name=edit_name.gettext (). toString (); 
        String Pass=edit_pass.gettext (). toString (); 
          if (textutils.isempty (name)) {Toast.maketext (loginactivity.this, "User name cannot be empty", Toast.length_short). Show (); 
        Return }else if (Textutils.isempty pass) {toast.maketext (loginactivity.this, password cannot be empty, toast.length_short). Show ();
          Return }else{if (box_remeber.ischecked ()) {LoginActivity.this.fileService.saveToRom (name, pass, private). 
            TXT "); 
          Toast.maketext (Loginactivity.this, "username and password saved", Toast.length_short). Show (); 
          }else{Toast.maketext (Loginactivity.this, "username and password do not need to be saved", Toast.length_short). Show (); 
      }} break; 
      Default:break; 
        }/*if (Id==btn_login.getid ()) {String name=edit_name.gettext (). toString (); 
        String Pass=edit_pass.gettext (). toString (); 
          if (textutils.isempty (name)) {Toast.maketext (loginactivity.this, "User name cannot be empty", Toast.length_short). Show (); 
        Return 
          }else if (Textutils.isempty pass) {toast.maketext (loginactivity.this, password cannot be empty, toast.length_short). Show (); 
        Return }else{if (box_remeber.ischecked ()) {LoginActivity.this.fileService.saveToRom (name, pass, private). TxT "); 
          Toast.maketext (Loginactivity.this, "username and password saved", Toast.length_short). Show (); 
          }else{Toast.maketext (Loginactivity.this, "username and password do not need to be saved", Toast.length_short). Show ();

 } 
        } 
      }*/ 
    } 
  } 
}

Fileservice.java:

Package com.example.login.service; 
Import Java.io.FileInputStream; 
Import Java.io.FileOutputStream; 
Import Java.util.HashMap; 
Import Java.util.Map; 
Import Com.example.login.utils.StreamTools; 
Import Android.content.Context; 
  public class Fileservice {public context context; 
  Public Fileservice {this.context = context; public boolean savetorom (String name,string pass,string fileName) {try{FileOutputStream Fos=context.open 
      Fileoutput (FileName, context.mode_private); 
      String result=name+ ":" +pass; 
      Fos.write (Result.getbytes ()); 
      Fos.flush (); 
    Fos.close (); 
      }catch (Exception e) {e.printstacktrace (); 
    return false; 
  return true; 
    Public map<string,string> readFile (String fileName) {map<string,string> map=null; 
      try{FileInputStream Fis=context.openfileinput (fileName); 
      String value=streamtools.getvalue (FIS); String values[]=value.split (":"); 
        if (values.length>0) {map=new hashmap<string, string> (); 
        Map.put ("name", Values[0]); 
      Map.put ("Pass", values[1]); 
    }}catch (Exception e) {e.printstacktrace (); 
  } return map;

 } 
}

Streamtools.java:

Package com.example.login.utils; 
Import Java.io.ByteArrayOutputStream; 
Import Java.io.FileInputStream; 
public class Streamtools {public 
  static String GetValue (FileInputStream fis) throws 
    exception{ Bytearrayoutputstream stream=new Bytearrayoutputstream (); 
    Byte[] Buffer=new byte[1024]; 
    int length=-1; 
    while ((Length=fis.read (buffer))!=-1) { 
      stream.write (buffer,0,length); 
    } 
    Stream.flush (); 
    Stream.Close (); 
    String value=stream.tostring (); 
    return value; 
  } 
}

Login_activity.xml:

<relativelayout 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:paddi" ngbottom= "@dimen/activity_vertical_margin" android:paddingleft= "@dimen/activity_horizontal_margin" Android: paddingright= "@dimen/activity_horizontal_margin" android:paddingtop= "@dimen/activity_vertical_margin" tools: Context= ".  
    Loginactivity "> <linearlayout android:layout_width=" match_parent "android:layout_height=" Wrap_content " Android:layout_alignparentleft= "true" android:layout_alignparenttop= "true" android:orientation= "vertical" 
      > <linearlayout android:layout_width= "match_parent" android:layout_height= "Wrap_content" > <textview android:id= "@+id/view_name" android:layout_width= "Wrap_content" android:layout _height= "Wrap_content" android:text= "@striNg/text_name "/> <edittext android:id=" @+id/edit_name "android:layout_width=" 0DP " android:layout_height= "Wrap_content" android:layout_weight= "1" android:ems= "ten" Android:inputt Ype= "Textpersonname" > <requestfocus/> </EditText> </LinearLayout> <line 
        Arlayout android:layout_width= "match_parent" android:layout_height= "wrap_content" > <TextView Android:id= "@+id/view_pass" android:layout_width= "wrap_content" android:layout_height= "Wrap_cont" Ent "android:text=" @string/text_pass "/> <edittext android:id=" @+id/edit_pass "and Roid:layout_width= "0DP" android:layout_height= "Wrap_content" android:layout_weight= "1" android: ems= "android:inputtype=" "Textpassword"/> </LinearLayout> <linearlayout android:l Ayout_width= "Match_parenT "android:layout_height=" wrap_content "> <button android:id=" @+id/btn_login "Androi 
        D:layout_width= "Wrap_content" android:layout_height= "wrap_content" android:layout_weight= "0.17" android:text= "@string/text_login"/> <checkbox android:id= "@+id/cbx_remember" Android:layo Ut_width= "Wrap_content" android:layout_height= "wrap_content" android:layout_marginleft= "80DP" a

 ndroid:text= "@string/text_rember"/> </LinearLayout> </LinearLayout> </RelativeLayout>

String.xml:

<?xmlversion= "1.0" encoding= "Utf-8"?>
<resources>
<stringname= "App_name" >login</ string>
<stringname= "action_settings" >Settings</string>
<stringname= "Hello_world" >Login</string>
<stringname= "Text_name" > Username:</string>
<stringname= "Text_pass" > Password:</string>
<stringname= "Text_login" > Landing </string>
<stringname= "Text_rember" > Remember passwords </string>
</resources>

I hope this article will help you with the Android program.