android StartActivity crash

i'm trying to go to my next activity , which is Nieuw_huis1 This is my code of the mainactivity where SetupNieuwHuis should redirect to the next page

    package com.jan.energyservice;

    import java.io.FileInputStream;
    import java.io.FileOutputStream;
    import java.io.PrintStream;

    import android.support.v7.app.ActionBarActivity;
    import android.content.Context;
    import android.content.Intent;
    import android.os.Bundle;
    import android.view.MenuItem;
    import android.view.View;
    import android.widget.Button;
    import android.widget.EditText;
    import android.widget.Toast;

    public class MainActivity extends ActionBarActivity {
private EditText test;
private String data;
private String file = "mydata";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    test = (EditText) (findViewById(R.id.txtTest));

    setupNieuwHuis();
    slaietsop();
    tooniets();
}

    private void tooniets() {
        // 1 Reference
            Button Movebutton = (Button) findViewById(R.id.btnLees);
            // 2 click listener to run code
            Movebutton.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    read(test);
}});}

    private void slaietsop() {
    // 1 Reference
        Button Movebutton = (Button) findViewById(R.id.btnTest);
        // 2 click listener to run code
        Movebutton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                save(test);
                                        }
            });
        }
    public void save(View view){
          data = test.getText().toString();
          try {
             FileOutputStream fOut = openFileOutput(file,Context.MODE_PRIVATE);
             new PrintStream(fOut).println("Naam van eerste ding");
             fOut.write(data.getBytes());
             fOut.close();
             Toast.makeText(getBaseContext(),"file saved",
             Toast.LENGTH_SHORT).show();
          } catch (Exception e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
          }
       }
    public void read(View view){
          try{
             FileInputStream fin = openFileInput(file);
             int c;
             String temp="";
             while( (c = fin.read()) != -1){
                temp = temp + Character.toString((char)c);
             }
             test.setText(temp);
             Toast.makeText(getBaseContext(),"file read",
             Toast.LENGTH_SHORT).show();

          }catch(Exception e){
              }
          }

private void setupNieuwHuis() {
    // 1 Reference
    Button Movebutton = (Button) findViewById(R.id.btnNieuwHuis);


    // 2 click listener to run code
    Movebutton.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            Intent intent =(new Intent(MainActivity.this,Nieuw_huis1.class));
            startActivity(intent);
        }
    });
}


@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}

    }

But for some reason , when i start up my app, and i click on the button btnNieuwHuis , it crashes and gives me this error log

05-24 10:51:16.466: E/Trace(825): error opening trace file: No such file or directory (2) 05-24 10:51:18.707: D/gralloc_goldfish(825): Emulator without GPU emulation detected. 05-24 10:51:29.166: D/AndroidRuntime(825): Shutting down VM 05-24 10:51:29.166: W/dalvikvm(825): threadid=1: thread exiting with uncaught exception (group=0x40a71930) 05-24 10:51:29.196: E/AndroidRuntime(825): FATAL EXCEPTION: main 05-24 10:51:29.196: E/AndroidRuntime(825): android.content.ActivityNotFoundException: Unable to find explicit activity class {com.jan.energyservice/com.jan.energyservice.Nieuw_huis1}; have you declared this activity in your AndroidManifest.xml? 05-24 10:51:29.196: E/AndroidRuntime(825): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1618) 05-24 10:51:29.196: E/AndroidRuntime(825): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1417) 05-24 10:51:29.196: E/AndroidRuntime(825): at android.app.Activity.startActivityForResult(Activity.java:3370) 05-24 10:51:29.196: E/AndroidRuntime(825): at android.app.Activity.startActivityForResult(Activity.java:3331) 05-24 10:51:29.196: E/AndroidRuntime(825): at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:840) 05-24 10:51:29.196: E/AndroidRuntime(825): at android.app.Activity.startActivity(Activity.java:3566) 05-24 10:51:29.196: E/AndroidRuntime(825): at android.app.Activity.startActivity(Activity.java:3534) 05-24 10:51:29.196: E/AndroidRuntime(825): at com.jan.energyservice.MainActivity$3.onClick(MainActivity.java:98) 05-24 10:51:29.196: E/AndroidRuntime(825): at android.view.View.performClick(View.java:4204) 05-24 10:51:29.196: E/AndroidRuntime(825): at android.view.View$PerformClick.run(View.java:17355) 05-24 10:51:29.196: E/AndroidRuntime(825): at android.os.Handler.handleCallback(Handler.java:725) 05-24 10:51:29.196: E/AndroidRuntime(825): at android.os.Handler.dispatchMessage(Handler.java:92) 05-24 10:51:29.196: E/AndroidRuntime(825): at android.os.Looper.loop(Looper.java:137) 05-24 10:51:29.196: E/AndroidRuntime(825): at android.app.ActivityThread.main(ActivityThread.java:5041) 05-24 10:51:29.196: E/AndroidRuntime(825): at java.lang.reflect.Method.invokeNative(Native Method) 05-24 10:51:29.196: E/AndroidRuntime(825): at java.lang.reflect.Method.invoke(Method.java:511) 05-24 10:51:29.196: E/AndroidRuntime(825): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 05-24 10:51:29.196: E/AndroidRuntime(825): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 05-24 10:51:29.196: E/AndroidRuntime(825): at dalvik.system.NativeStart.main(Native Method)