Jsoup parser tabs

package cryptostreet.com.cryptostreet;

import android.os.AsyncTask;
import android.support.design.widget.TabLayout;
import android.support.design.widget.FloatingAc tionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity ;
import android.support.v7.widget.Toolbar;

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdap ter;
import android.support.v4.view.ViewPager;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;

import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

import java.io.IOException;
import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

public Elements content;
public ArrayList<String> titleList = new ArrayList<>();
private ArrayAdapter<String> adapter;
private ListView lv;

/**
* The {@link android.support.v4.view.PagerAdapter} that will provide
* fragments for each of the sections. We use a
* {@link FragmentPagerAdapter} derivative, which will keep every
* loaded fragment in memory. If this becomes too memory intensive, it
* may be best to switch to a
* {@link android.support.v4.app.FragmentStatePage rAdapter}.
*/
private SectionsPagerAdapter mSectionsPagerAdapter;

/**
* The {@link ViewPager} that will host the section contents.
*/
private ViewPager mViewPager;

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

lv = (ListView) findViewById(R.id.listView1);
new NewThread().execute();
adapter = new ArrayAdapter<String>(this, R.layout.tab1contacts , R.id.pro_item, titleList);

Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
// Create the adapter that will return a fragment for each of the three
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentM anager());

// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdap ter);

TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(mViewPager) ;

FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});


}
public class NewThread extends AsyncTask<String ,Void , String> {

@Override
protected String doInBackground(String ... arg){
Document doc;
try {
doc = Jsoup.connect("http://www.volzsky.ru/index.php?wx=16").get();
content = doc.select(".btc_block-1");
titleList.clear();
for (Element contents: content){
titleList.add(contents.text());
}
} catch (IOException e){
e.printStackTrace();
} return null;
}
@Override
protected void onPostExecute (String result) {
lv.setAdapter(adapter);
}
}



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

@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();

//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}

return super.onOptionsItemSelected(item);
}



/**
* A {@link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {

public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}

@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
Tab1Contacts tab1 = new Tab1Contacts();
return tab1;
case 1:
Tab2Chat tab2 = new Tab2Chat();
return tab2;
case 2:
Tab3Online tab3 = new Tab3Online();
return tab3;
default:
return null;


}
}

@Override
public int getCount() {
// Show 3 total pages.
return 3;
}

@Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "Сейчас";
case 1:
return "Предстоящие";
case 2:
return "Прошедшее";
}
return null;
}
}
}