android - How to set a different java file as launcher -

i new android , have created class in android project other default mainactivity class , want start project file. here added manifest file:

<activity         android:name="com.example.surfaceview.surfaceviewexample"         android:label="@string/app_name" >         <intent-filter>             <action android:name="android.intent.action.surfaceview" />              <category android:name="android.intent.category.launcher" />         </intent-filter>     </activity> 

and class created:

public class surfaceviewexample extends activity implements ontouchlistener {  ourview v;  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     v=new ourview(this);     setcontentview(v);     v.setontouchlistener(this); }    @override protected void onpause() {     // todo auto-generated method stub     super.onpause();     v.pause(); }    @override protected void onresume() {     // todo auto-generated method stub     super.onresume();     v.resume(); }    public class ourview extends surfaceview implements runnable{      thread t = null;     surfaceholder holder;     boolean isitok=false;      public ourview(context context) {         super(context);         holder=getholder();     }      @override     public void run() {         while(isitok){             if(holder.getsurface().isvalid()){                 continue;             }              canvas c = holder.lockcanvas();             c.drawargb(255, 155, 155, 10);//canvas backgroundu boyama             holder.unlockcanvasandpost(c);         }      }      public void pause(){ //pause thread         isitok=false;         while(true){             try{                 t.join();             }catch(interruptedexception e){                 e.printstacktrace();             }             break;                       }         t=null;     }      public void resume(){ //resume thread         isitok=true;         t=new thread(this); //this parameter means use run method                             //which inside class         t.start();     }   }    @override public boolean ontouch(view v, motionevent me) {     return false; }  } 

but application not start. think problem might in line inside intent filter:

<action android:name="android.intent.action.surfaceview" /> 

can me this?

thanks

update manifest following code activity. should launch activity.

<activity         android:name="com.example.surfaceview.surfaceviewexample"         android:label="@string/app_name" >         <intent-filter>             <action android:name="android.intent.action.main" />              <category android:name="android.intent.category.launcher" />         </intent-filter>     </activity> 

i hope helps.