Android sharedpreferences simple application Insert data read data

 Packagecom.sharedpreference; ImportJava.text.SimpleDateFormat; Importjava.util.Date; ImportAndroid.os.Bundle; Importandroid.app.Activity; Importandroid.content.SharedPreferences; ImportAndroid.view.Menu; ImportAndroid.view.View; ImportAndroid.view.View.OnClickListener; ImportAndroid.widget.Button; ImportAndroid.widget.Toast;  Public classSharedpreferenceactivityextendsActivity {sharedpreferences preferences; //Editor put valueSharedpreferences.editor Editor; PrivateButton Btnwrite; PrivateButton Btnread; @Overrideprotected voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);          Setcontentview (R.layout.activity_main); Btnread=(Button) Findviewbyid (R.id.read); Btnwrite=(Button) Findviewbyid (r.id.write); //context-provided getsharedpreferences get sharedpreferences instancesPreferences = Getsharedpreferences ("Bang", mode_private); Editor=Preferences.edit (); Btnread.setonclicklistener (NewOnclicklistener () {@Override Public voidOnClick (View arg0) {//reading string data typesString time = preferences.getstring ("Time",NULL); //read int data type                intRandnum = Preferences.getint ("Randrom", 0); String result= Time = =NULL? "You have not yet written the data": "Write Time:" +time+ "\ n the last generated random number is:" +Randnum; Toast.maketext (sharedpreferenceactivity. This, result,5000). Show ();                    }          }); Btnwrite.setonclicklistener (NewOnclicklistener () {@Override Public voidOnClick (View arg0) {SimpleDateFormat SDF=NewSimpleDateFormat ("yyyy mm month DD Day" + "Hh:mm:ss"); Editor.putstring ("Time", Sdf.format (NewDate ())); Editor.putint ("Randrom", (int) (Math.random () *100)); //commit the saved dataEditor.commit ();                }          }); } @Override Public BooleanOncreateoptionsmenu (Menu menu) {//inflate the menu; This adds items to the action bar if it is present. getmenuinflater (). Inflate (R.menu.main, menu); return true; }        }  

The XML file under the generated shared_prefs is

<?XML version= ' 1.0 ' encoding= ' utf-8 ' standalone= ' yes '?>  <Map>      <stringname= "Time">April 14, 2014 01:10:21</string>      <intname= "Randrom"value= " the" />  </Map>  

Sharedpreferences store simple data Save key value pair type data