Android Hands-on tutorial seventh how to store user names and passwords in memory _android

The example of this article for everyone to share the Android memory stored username and password method for your reference, the specific content as follows

First, 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:lay" 
    Out_width= "Match_parent" android:layout_height= "wrap_content" android:hint= "Please enter username"/> Android:id= "@+id/et_pass" android:layout_width= "match_parent" android:layout_height= "Wrap_content" Andr Oid:inputtype= "Textpassword" android:hint= "Please enter the password"/> <relativelayout android:layout_width= "Match_ 
  Parent "android:layout_height=" Wrap_content "  android:orientation= "Horizontal" > <checkbox android:id= "@+id/cb" W Rap_content "android:layout_height=" wrap_content "android:text= remember username and password" android:layout_centervertic Al= "true"/> <button android:layout_width= wrap_content "android:layout_height=" Wrap_cont Ent "android:layout_gravity=" right "android:text=" login "android:layout_alignparentright=" true "a 
 ndroid:onclick= "Login"/> </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 savedinstancestate) {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 ()//is read in OnCreate because the activity is created to read the username 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 flows to character streams//BufferedReader BR = new BufferedReader (New//InputStreamReader (FIS)); 
        BufferedReader br = new BufferedReader (new FileReader (file)); 
        Read the username 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 block E.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 = new file ("Data/data/com.itydl.rwinrom/info.txt");//This path is a Androut folder Fileoutputstre 
      Am FOS; 
        try {fos = new FileOutputStream (file); 
        check box is checked, the user name password will be stored in the internal storage location Fos.write (name + "# #" + Pass). GetBytes ()); 
      Fos.close (); 
      catch (Exception e) {//TODO auto-generated catch block E.printstacktrace (); 
  }//Create and display the Toast dialog box Toast.maketext (this, login succeeded, 0). Show (); 
 } 
   
}

Finally, the screenshot:

When you exit the program and then enter, you will see that both the username and password are echoing.

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.