Android Simple Combat Tutorial--The seventh session of "Store user name and password in memory"

The first is the configuration file:

<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: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= ". Mainactivity "android:orientation=" vertical "> <edittext android:id=" @+id/et_name "android:l Ayout_width= "Match_parent" android:layout_height= "wrap_content" android:hint= "Please enter user name"/> <Ed Ittext android:id= "@+id/et_pass" android:layout_width= "match_parent" android:layout_height= "Wrap_cont Ent "android:inputtype=" Textpassword "android:hint=" Please enter the password "/> <relativelayout androi D:layout_width= "Match_parent" android:layout_height= "wrap_content" android:orientation= "horizontal" ><checkbox android:id= "@+id/cb" Android:la Yout_width= "Wrap_content" android:layout_height= "Wrap_content" android:text= "Remember user name and password" Android:layout_centerverti Cal= "true"/><button android:layout_width= "wrap_content" android:layout_height= "Wrap_content" android:l Ayout_gravity= "right" android:text= "login" android:layout_alignparentright= "true" android:onclick= "login"/&GT;&L T;/relativelayout></linearlayout>

The code in the activity is as follows:

Package Com.itydl.rwinrom;import Java.io.bufferedreader;import Java.io.file;import java.io.fileinputstream;import Java.io.filenotfoundexception;import Java.io.fileoutputstream;import Java.io.filereader;import Java.io.inputstreamreader;import Org.apache.http.entity.inputstreamentity;import Android.os.Bundle;import Android.annotation.suppresslint;import Android.app.activity;import Android.view.menu;import Android.view.View; Import Android.widget.checkbox;import Android.widget.edittext;import Android.widget.toast;public class MainActivity Extends Activity {private EditText et_name;private EditText et_pass; @Override protected void onCreate (Bundle savedi        Nstancestate) {super.oncreate (savedinstancestate);                Setcontentview (R.layout.activity_main);    Et_name = (EditText) Findviewbyid (r.id.et_name);            Et_pass = (EditText) Findviewbyid (R.id.et_pass);            Readaccount ();//The reason for reading in OnCreate is that the activity is created to read the user name and password for Echo. } public void Readaccount () {File File = new File ("Data/data/com.itydl.rwinrom/info.txt"); if (file.exists ()) {try {//FileInputStream FIS = new FileInputStream (file),////convert byte stream to character streams//BufferedReader BR = new Bu        Fferedreader (new//inputstreamreader (FIS)); BufferedReader br = new BufferedReader (new FileReader);//Read user name and password in TXT file string text = Br.readline (); String[] s = Text.split ("# #");//Regular Expression Et_name.settext (S[0]);//ctrl+1 extract global variable Et_pass.settext (s[1]);}    catch (Exception e) {//TODO auto-generated catch Blocke.printstacktrace ();}    }} public void login (View v) {String name = Et_name.gettext (). toString ();        String pass = Et_pass.gettext (). toString ();    CheckBox cb = (checkbox) Findviewbyid (R.ID.CB); Determine if the marquee is checked if (cb.ischecked ()) {//data/data/com.itheima.rwinrom: This is the path to the internal storage space File File = new file ("data/data/com. Itydl.rwinrom/info.txt ");//This path is Androut folder FileOutputStream fos;try {fos = new FileOutputStream (file);//check box is checked, The username and password will be stored in the internal storage location Fos.write (name + "# #" + Pass). GetbyTES ()); Fos.close ();}    catch (Exception e) {//TODO auto-generated catch Blocke.printstacktrace ();}    }//Create and display the Toast dialog toast.maketext (this, "login succeeded", 0). Show (); }    }

The last is:

When you exit the program and then enter, you will see that the user name and password are echoed.

Android Simple Combat Tutorial--The seventh session of "Store user name and password in memory"