Why can't I see any changes in my “Place” tab

Question

I want each tab to to show something different. To start things off, I want to make changes to the Place tab. The problem is, none of the changes are being reflected in the Android Simulator.

Image of what I'm referring to

In this case, I want the text something to show up, but it's not. What am I doing wrong? I've also included code that might be relevant to this issue.

Here's MainActivity.java :

import android.net.Uri;
import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import java.util.ArrayList;
import java.util.Arrays;

public class MainActivity extends AppCompatActivity implements Place.OnFragmentInteractionListener, Profile.OnFragmentInteractionListener, Take.OnFragmentInteractionListener {


    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        TabLayout tabLayout = (TabLayout)findViewById(R.id.tabLayout);
        tabLayout.addTab(tabLayout.newTab().setText("Place"));
        tabLayout.addTab(tabLayout.newTab().setText("Take"));
        tabLayout.addTab(tabLayout.newTab().setText("Profile"));

        final ViewPager viewPager = (ViewPager)findViewById(R.id.pager);
        final PagerAdapter adapter = new PagerAdapter(getSupportFragmentManager(),tabLayout.getTabCount());
        viewPager.setAdapter(adapter);
        viewPager.setOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));

        tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
            @Override
            public void onTabSelected(TabLayout.Tab tab) {
                viewPager.setCurrentItem(tab.getPosition());
            }

            @Override
            public void onTabUnselected(TabLayout.Tab tab) {

            }

            @Override
            public void onTabReselected(TabLayout.Tab tab) {

            }
        });
    }

    @Override
    public void onFragmentInteraction(Uri uri) {

    }
}

Here's fragment_place.xml :

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"


    <!-- TODO: Update blank fragment layout -->
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Place"
        android:layout_centerInParent="true"
        android:textSize="30dp"
        android:id="@+id/textView" />

    <EditText
        android:id="@+id/editText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="41dp"
        android:layout_marginStart="41dp"
        android:layout_marginTop="80dp"
        android:ems="10"
        android:inputType="textPersonName"
        android:text="Something" />

</RelativeLayout>

Here's PagerAdapter.java :

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;

public class PagerAdapter extends FragmentStatePagerAdapter {

    int mNoOfTabs;

    public PagerAdapter(FragmentManager fm, int NumberOfTabs) {
        super(fm);
        this.mNoOfTabs = NumberOfTabs; // set global number of tabs to local number of tabs
    }

    @Override
    public Fragment getItem(int position) {
        switch(position) {
            case 0:
                Place place = new Place();
                return place;
            case 1:
                Profile profile = new Profile();
                return profile;
            case 2:
                Take take = new Take();
                return take;
            default:
                return null;
        }
    }

    @Override
    public int getCount() {
        return 0;
    }
}

Answer 1

我在您的代码中看不到您为片段提供布局xml的位置

Answer 2

Change the lines to given code.

 @Override
 public int getCount() {
    return mNoOfTabs ;
 }

Also make sure you inflate the layout belong to Place (Fragment) onViewCreated() method