Threading is not working....

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Android

this simple threading is not working cann't find the errors help please...
i want to show my splash.xml for 6 sec and then activity_main.xml but it not showing the activity_main.xml ......

What I have tried:

my splash.java code:

package com.example.ne;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;

public class splash extends Activity{
	
	 protected void onCreate(Bundle savedInstanceState) {
	        super.onCreate(savedInstanceState);
	        setContentView(R.layout.splash);
	        Thread timer = new Thread()
	        {
	        	public void run(){
	        		try{
	        			sleep(6000);
	        			
	        			
	        		} catch(InterruptedException e){
	        			e.printStackTrace();
	        			
	        		}finally{
	        			Intent open =new Intent("com.example.ne.MAINACTIVITY");
	        			startActivity(open);
	        		}
	        	}
	        };
	        timer.start();
	        
	 }
	

}

and mainactivity.java code:

package com.example.ne;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends Activity {
	
	
	int counter;
	Button add,sub;
	TextView display;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        counter=0;
        add=(Button) findViewById(R.id.bAdd);
        sub=(Button)findViewById(R.id.bSub);
        display=(TextView)findViewById(R.id.tvdisplay);
        add.setOnClickListener(new View.OnClickListener() {
			
			@Override
			
			public void onClick(View arg0) {
				counter++;
				// TODO Auto-generated method stub
				display.setText("Your total is" + counter);
				
			}
		});
sub.setOnClickListener(new View.OnClickListener() {
			
			@Override
			
			public void onClick(View arg0) {
				counter--;
				display.setText("Your total is" + counter);
				// TODO Auto-generated method stub
				
			}
		});
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
    
}

and manifest.xml code:


<manifest xmlns:android="http://schemas.android.com/apk/res/android">
package="com.example.ne"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk>
android:minSdkVersion="8"
android:targetSdkVersion="17" />

<application>
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity>
android:name="com.example.ne.splash"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN">

<category android:name="android.intent.category.LAUNCHER">



<application>
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity>
android:name=".MainActivity" android:label="@string/app_name" >
<intent-filter>
<action android:name="com.example.ne.MAINACTIVITY">

<category android:name="android.intent.category.DEFAULT">