How do I get rid of these errors?

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URI;
import java.util.ArrayList;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
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.conn.params.ConnManagerParams;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.apache.http.impl.client.DefaultHttpClient;



public class CustomHttpClient {
    public static final int HTTP_TIMEOUT= 30*1000;
    private static HttpClient mHttpClient;
    private static HttpClient getHttpClient(){
        if (mHttpClient == null) {
            mHttpClient = new DefaultHttpClient();
            final HttpParams params = mHttpClient.getParams();
            HttpConnectionParams.setConnectionTimeout(params, HTTP_TIMEOUT);
            HttpConnectionParams.setSoTimeout(params, HTTP_TIMEOUT);
            ConnManagerParams.setTimeout(params, HTTP_TIMEOUT);
        }
        return mHttpClient;
    }

    public static String executeHttpPost(String url,ArrayList<NameValuePair>throws Exception){  //1 error in this line.
        BufferedReader in= null;
        try{ //1 error in this line.
            HttpClient client= getHttpClient();
            HttpPost request= new HttpPost(url); //1 error in this line.
            UrlEncodedFormEntity formEntity= new UrlEncodedFormEntity(postParameters);//1 error in this line.
            request.setEntity(formEntity); //1 error in this line. 
            HttpResponse response= client.execute(request); //1 error in this line.
            in= new BufferedReader(new InputStreamReader(response.getEntity().getContent())); //1 error in this line.
            StringBuffer sb= new StringBuffer(""); //1 error in this line.
            String line=""; //1 error in this line.
            String NL= System.getProperty("line.separator"); //1 error in this line.
            while((line=in.readLine())!= null){  //1 error in this line.
                sb.append(line+NL);
            } //1 error in this line.
            in.close();
            String result= sb.toString(); //1 error in this line.
            return result; //1 error in this line.

        }finally{ //1 error in this line.
            if(in!= null){
                try{
                    in.close();
                }catch(IOException e){ //1 error in this line.
                    e.printStackTrace();
                }//1 error in this line.
            }
        }
    }

    public static String executeHttpGet(String url) throws Exception{ //1 error in this line.
        BufferedReader in= null;
        try{ //1 error in this line.
            HttpClient client= getHttpClient();
            HttpGet request= new HttpGet(); //1 error in this line.
            request.setURI(new URI(url)); //1 error in this line.
        } //1 error in this line.
    }


}

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.logging.ErrorManager;

import static android.R.attr.id;
import static android.R.id.content;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;



public class LogIn extends Activity {

    Button b;
    EditText t1,t2;
    TextView error;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        b=(Button)findViewById(R.id.button);
        t1=(EditText)findViewById(R.id.editText);
        t2=(EditText)findViewById(R.id.editText2);
        error=(TextView)findViewById(R.id.textView6);

        b.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v){
                ArrayList<NameValuePair> postParameters = new ArrayList<NameValuePair>();
                postParameters.add(new BasicNameValuePair("email", t1.getText().toString()));
                postParameters.add(new BasicNameValuePair("password", t2.getText().toString()));

                String response = null;
                try {
                    response = CustomHttpClient.executeHttpPost("<target page url>", postParameters);
                    String res = response.toString();
                    res = res.replaceAll("\\s+", "");
                    if (res.equals(1))
                        error.setText("Correct Credentials.");
                    else
                        error.setText("Invalid Credentials.");
                } catch (Exception ex) {
                    t1.setText(ex.toString());
                }
            }
        });
    }// Error in this line.

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.os.Handler;

public class MainActivity extends AppCompatActivity {

    private static int SPLASH_TIME=3000;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        int secondsDelayed = 3;
        new Handler().postDelayed(new Runnable() {
            public void run() {
                startActivity(new Intent(MainActivity.this, LogIn.class));
                finish();
            }
        } secondsDelayed * 1000); //4 errors here.
    }
}