<? xml version= "1.0" encoding= "utf-8" ?> < RelativeLayout xmlns: android = "http://schemas.android.com/apk/res/android"     xmlns: app = "http://schemas.android.com/apk/res-auto"     xmlns: tools = "http://schemas.android.com/tools"     android :layout_width= "match_parent"     android :layout_height= "match_parent"     tools :context= "com.arham.csdevbin.downloadimagefrominternet.SharedPreferencesDemo" >     < CheckBox         android :id= "@+id/checkBox"         android :layout_width= "wrap_content"         android :layout_height= "wrap_content"         android :layout_alignParentLeft= "true"         android :layout_alignParentStart= "true"         android :layo...

Interface for accessing and modifying preference data returned by  getSharedPreferences(String, int) . For any particular set of preferences, there is a single instance of this class that all clients share. Modifications to the preferences must go through an  SharedPreferences.Editor  object to ensure the preference values remain in a consistent state and control when they are committed to storage. Objects that are returned from the various  get  methods must be treated as immutable by the application. MainActivity.java import android.content.Intent; import android.content.SharedPreferences; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; public class MainActivity extends AppCompatActivity { EditText user, pass; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(...