I got ActivityNotFoundException error when i was trying to startup a new activity in android -

i trying start activity setup email account main activity. not working , driving me nuts. have is:

button.setonclicklistener(new view.onclicklistener()     {         public void onclick(view v)         {             edittext username = (edittext) findviewbyid(r.id.edittext1);             edittext password = (edittext) findviewbyid(r.id.edittext2);              componentname cname = new componentname("com.android.email",             "com.android.email.activity.setup.accountsetupbasics");             intent intent = new intent("android.intent.action.main");             intent.putextra("com.android.email.accountsetupbasics.username", username.gettext().tostring());             intent.putextra("com.android.email.accountsetupbasics.password", password.gettext().tostring());             intent.putextra("com.android.email.extra.eas_flow", true);             intent.setcomponent(cname);             intent.setflags(intent.flag_activity_new_task);             context.startactivity(intent);         }     }); 

manifest is:

<application     android:allowbackup="true"     android:icon="@drawable/ic_launcher"     android:label="@string/app_name"     android:theme="@style/apptheme" >     <activity         android:name="com.example.test.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> </application> 

and error:

android.content.activitynotfoundexception: unable find explicit activity class {com.android.email/com.android.email.activity.setup.accountsetupbasics}; have declared activity in androidmanifest.xml?

i'm new this, can tell me how solve error?

any response appreciated.

you can start other's activity if exported. check if com.android.email.activity.setup.accountsetupbasics is. , should try/catch startactivity() can throw exception more reasons , if let go uncaught, app crash