android - Unfortunately Your application has stopped -

i trying switch 1 activity other using intents, first activity running when second activity starts app gets stopped. have attached code this.

manifest :

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android"     package="com.example.sampleapp"     android:versioncode="1"     android:versionname="1.0" >      ...      <application         ...           <activity             android:name="com.example.sampleapp.mainactivity"             android:label="@string/app_name" >             <intent-filter>                 <action android:name="android.intent.action.main" />                  <category android:name="android.intent.category.launcher" />             </intent-filter>         </activity>         <activity             android:name="com.example.sampleapp.welwithname"             android:label="@string/app_name" >             <intent-filter>                 <action android:name="android.intent.action.welwithname" />                  <category android:name="android.intent.category.default" />             </intent-filter>         </activity>          ...      </application>    </manifest> 

this default activity. tried string , send next activity.here xml , activity. activity code:

public class mainactivity extends activity {     public final static string extra_message = "com.example.sampleapp.message";      string tempname;     button submit;     edittext name;      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);         submit= (button)findviewbyid(r.id.button1);           submit.setonclicklistener(new view.onclicklistener() {              public void onclick(view v) {                  intent intent = new intent(mainactivity.this,welwithname.class);                 edittext edittext = (edittext) findviewbyid(r.id.getname);                 string message = edittext.gettext().tostring();                 intent.putextra(extra_message, message);                 startactivity(intent);              }          });      }   } 

second activity:

this activity gets string activity 1 , print value..heres xml , activity activity code:

public class welwithname extends activity {      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.welwithname);         intent intent = getintent();         string message = intent.getstringextra(mainactivity.extra_message);         // create text view         textview textview = (textview)findviewbyid(r.id.textview1);         textview.settextsize(40);         textview.settext("welcome" + message + "!!!" );         button sq = (button)findviewbyid(r.id.sq);         button exit = (button)findviewbyid(r.id.exit);          sq.setonclicklistener(new onclicklistener()         {             @override             public void onclick(view v)             {                 intent main = new intent(welwithname.this,mainscreen.class);                 startactivity(main);             }          });          // set text view activity layout         setcontentview(textview);     }      ...  } 

what changes should made in code make run?

 <activity         android:name="com.example.sampleapp.welwithname" 

isn't class called welwithname ?

capitalise 'w' in activity name in androidmanifest.xml

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you not going developer long if not read console / logcat output when come across crash.

if read logcat saying "cannot find activity welwithname, have declared in manifest?" , answer , stackoverflow happier place

http://developer.android.com/tools/help/logcat.html