(iii) Transfer of parameters between pages

First, page jump

1. No return value

Open Aty1

// Jump Aty1 Intent i=New Intent (mainactivity.  this, Aty1. class ); // Open startactivity (i);

Close Aty1

Finish ();

2, there is a return value of

Open Aty1 and pass in a string

PrivateButton btnStartAty1; PrivateTextView tvout; @Overrideprotected voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);        Setcontentview (R.layout.activity_main); BtnStartAty1=(Button) Findviewbyid (r.id.btnstartaty1); Tvout=(TextView) Findviewbyid (r.id.tvout); Btnstartaty1.setonclicklistener (NewView.onclicklistener () {@Override Public voidOnClick (view view) {Intent I=NewIntent (mainactivity. This, Aty1.class); //Passing StringsI.putextra ("txt", "adkj"); //open activity and receive the returned valueStartactivityforresult (i,0);    }        }); } @Overrideprotected voidOnactivityresult (intRequestcode,intResultCode, Intent data) {        //Receive StringString Result=data.getstringextra ("Result");        Tvout.settext (result); Super. Onactivityresult (Requestcode, ResultCode, data); }

Aty1 return information

PrivateButton btnclose; PrivateTextView tvout; protected voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);        Setcontentview (r.layout.aty1); Btnclose=(Button) Findviewbyid (r.id.btnclose); Btnclose.setonclicklistener (NewView.onclicklistener () {@Override Public voidOnClick (view view) {Intent I=NewIntent (); I.putextra ("Result", "Hello Mainactiviy"); //Send return valueSetresult (0, i);            Finish ();        }        }); Tvout=(TextView) Findviewbyid (r.id.tvout); Tvout.settext (Getintent (). Getstringextra ("TXT")); }

Second, the parameter transfer

1, Method one

// Jump Aty1 Intent i=New Intent (mainactivity.  this, Aty1. class ); // Pass parameter i.putextra ("txt", "adkj"); // Open startactivity (i);

Receive parameters

Getintent (). Getstringextra ("TXT")

2. Method Two

Intent i=New Intent (mainactivity.  this, Aty1. class ); Bundle Data=new  bundle ();d ata.putstring ("txt", "Hello Aty1"); I.putextras (data); StartActivity (i);

Receive parameters

Bundle data=getintent (). Getextras (); String txt=data.getstring ("txt");

(iii) Transfer of parameters between pages