java - Not able to get back to original activity using uri.parse method -

i beginner.i trying using uri.parse returning result. main java file.

package com.example.returnresult;  import android.app.activity; import android.content.intent; import android.os.bundle; import android.view.menu; import android.view.menuitem; import android.view.view; import android.widget.edittext; import android.widget.textview; import android.widget.toast;  public class mainactivity extends activity {  int request_code=1; @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main); }  public void sendmessage(view v){     intent = new intent(this,second.class);     startactivityforresult(i,request_code);  }  @override protected void onactivityresult(int requestcode, int resultcode, intent       data) {      if(requestcode == request_code)     {         if(resultcode == result_ok)         {                            toast.maketext(this,data.getdata().tostring(),                     toast.length_short).show();         }     } }  } 

this activity shows button on screen go second activity.and it's working fine.

and second java file.

package com.example.returnresult;  import android.app.activity; import android.content.intent; import android.net.uri; import android.os.bundle; import android.view.menu; import android.view.menuitem; import android.view.view; import android.widget.edittext; import android.widget.textview;  public class second extends activity {  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_second); }   public void sendback(view v){      intent = new intent();     edittext txt = (edittext)findviewbyid(r.id.age);     i.setdata(uri.parse(txt.gettext().tostring()));      setresult(result_ok,i);     finish(); }  } 

this activity shows edittext field. id age. there's button below has send data first activity , show toast. button not working. i'm not able problem. please help!

you seen not have initialized button in second java file. if have should use

i.putextra("string data", uri.parse(txt.gettext().tostring())); 

instead of

i.setdata(uri.parse(txt.gettext().tostring())); 

also retrieve information by

data.getstringextra("string data") 

instead of

data.getdata().tostring() 

hope helps.