Android studio listview doesn't show

Question

Hello Im new to android studio and i probably made a silly mistake which i cant find. So basicaly i have made a tabbed activity with all the days and i want to make a list (I wanna make a custom schedule app which will have all the activities i do daily).My ListView doesn't show :(. What have i done wrong?

EditActivity class code : https://hastebin.com/amajusutid.java

package com.timemanagement.restrictedpower.timemanagement;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Gravity;
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 java.util.ArrayList;
import java.util.List;

public class EditActivity extends AppCompatActivity {
    private SectionsPagerAdapter mSectionsPagerAdapter;
    private  ViewPager mViewPager;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_edit);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
        mViewPager = (ViewPager) findViewById(R.id.container);
        mViewPager.setAdapter(mSectionsPagerAdapter);
    }


    @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_edit, 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 placeholder fragment containing a simple view.
     */
    public static String day(int id){
        switch (id) {
            case 1:
                return "Monday";
            case 2:
                return "Tuesday";
            case 3:
                return "Wednesday";
            case 4:
                return "Thirsday";
            case 5:
                return "Friday";
            case 6:
                return "Saturday";
            case 7:
                return "Sunday";
        }
        return null;
    }
    public static class PlaceholderFragment extends Fragment {
        private static final String ARG_SECTION_NUMBER = "section_number";

        public PlaceholderFragment() {
        }
        public static PlaceholderFragment newInstance(int sectionNumber) {
            PlaceholderFragment fragment = new PlaceholderFragment();
            Bundle args = new Bundle();
            args.putInt(ARG_SECTION_NUMBER, sectionNumber);
            fragment.setArguments(args);
            return fragment;
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
            View v = inflater.inflate(R.layout.fragment_edit, container, false);

            ListView lv = (ListView) v.findViewById(R.id.Activities);
            List fruits_list = new ArrayList();
            fruits_list.add("Apple");
            fruits_list.add("Strawberry");
            ArrayAdapter arrayAdapter = new ArrayAdapter(getContext(), android.R.layout.simple_list_item_1, fruits_list);
            lv.setAdapter(arrayAdapter);
            lv.invalidateViews();
            View rootView = inflater.inflate(R.layout.fragment_edit, container, false);
            TextView textView = (TextView) rootView.findViewById(R.id.Day);
            int id = getArguments().getInt(ARG_SECTION_NUMBER);
            String day = day(getArguments().getInt(ARG_SECTION_NUMBER));
            textView.setText(day);
            textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.CENTER_HORIZONTAL);
            return rootView;
        }
    }
    public class SectionsPagerAdapter extends FragmentPagerAdapter {

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

        @Override
        public Fragment getItem(int position) {
            return PlaceholderFragment.newInstance(position + 1);
        }

        @Override
        public int getCount() {
            // Show 3 total pages.
            return 7;
        }

        @Override
        public CharSequence getPageTitle(int position) {
            switch (position) {
                case 0:
                    return "SECTION 1";
                case 1:
                    return "SECTION 2";
                case 2:
                    return "SECTION 3";
                case 3:
                    return "SECTION 4";
                case 4:
                    return "SECTION 5";
                case 5:
                    return "SECTION 6";
                case 6:
                    return "SECTION 7";
            }
            return null;
        }
    }
}

Xml code: https://hastebin.com/yapepideme.xml

Android studio listview doesn't show

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