Transfer simple data when activity jumps

I. Create a new Empty project

Two. Add a button to the main interface

Three. Create a new empty activity and name it Theaty

Four. Modifying the OnCreate function in Mainactivity.java

 protected voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);        Setcontentview (R.layout.activity_main); Findviewbyid (R.id.btnstartaty). Setonclicklistener (NewView.onclicklistener () {@Override Public voidOnClick (View v) {Intent I=NewIntent (mainactivity. This, Theaty.class); I.putextra ("Data", "Hello Android");//Pass a string argument with the name value "Data" and the value "Hello AndroidStartActivity (i);//Start another activity            }        }); }

Five. Add the ID number to the TextView in the Theaty layout file

<android:text= "@string/hello_world"  android:layout_width= "Wrap_ Content "        android:layout_height=" Wrap_content "        android:id=" @+id/ TV "/>

Six. Modify the OnCreate function in the Theaty source code file

Private TextView TV; // First, add a TextView member variable protected void onCreate (Bundle savedinstancestate) {        super. OnCreate (savedinstancestate);        Setcontentview (r.layout.activity_the_aty);         = Getintent (); // get the relevant intent        TV = (TextView) Findviewbyid (r.id.tv);        Tv.settext (I.getstringextra ("Data")); // set the value in the text box    }

Seven. Running

Transfer simple data when activity jumps