HttpRequest führt zum Crash

package de.bailey_rud.klasse12b;
import java.io.IOException;import java.io.UnsupportedEncodingException;import java.util.ArrayList;import java.util.List;
import org.apache.http.HttpResponse;import org.apache.http.NameValuePair;import org.apache.http.client.ClientProtocolException;import org.apache.http.client.HttpClient;import org.apache.http.client.entity.UrlEncodedFormEntity;import org.apache.http.client.methods.HttpGet;import org.apache.http.client.methods.HttpPost;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.message.BasicNameValuePair;
import android.app.Activity;import android.os.Bundle;import android.os.StrictMode;import android.util.Log;
public class FirstActivity extends Activity {
    @Override    protected void onCreate(Bundle savedInstanceState) {        if (android.os.Build.VERSION.SDK_INT > 9) {
            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
                    .permitAll().build();
            StrictMode.setThreadPolicy(policy);
        }                super.onCreate(savedInstanceState);        setContentView(R.layout.activity_first);
        makePostRequest();
    }    private void makePostRequest() {


        HttpClient httpClient = new DefaultHttpClient();        // replace with your url        HttpPost httpPost = new HttpPost("http://www.bailey-rud.de/api-login.php");


        //Post Data        List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>(2);        nameValuePair.add(new BasicNameValuePair("username", "test_user"));        nameValuePair.add(new BasicNameValuePair("password", "123456789"));


        //Encoding POST data        try {            httpPost.setEntity(new UrlEncodedFormEntity(nameValuePair));        } catch (UnsupportedEncodingException e) {            // log exception            e.printStackTrace();        }
        //making POST request.        try {            HttpResponse response = httpClient.execute(httpPost);            // write response to log            Log.d("Http Post Response:", response.toString());        } catch (ClientProtocolException e) {            // Log exception            e.printStackTrace();        } catch (IOException e) {            // Log exception            e.printStackTrace();        }
    }
}