Tukukkk

I created a Navigation Drawer and tried adding 3 Untabbed Fragments to the main activity. The code runs but the app only displays half of the screen on my device which features the nav drawer and an empty page. The 3 tabs which i wanted to use are not displayed and the lower segment of the screen is not swipe-able.

I have created two separate projects, one containing a navigation drawer and the other the tabbed activity but am having difficulty joining them together in a third project.

I have looked online for similar issues to not have a "duplicate post" but it seems the issue may be something i am missing.

I have also included the XML for my main activity.

import android.support.annotation.NonNull;

import android.support.design.widget.FloatingActionButton;

import android.support.design.widget.NavigationView;

import android.support.design.widget.Snackbar;

import android.support.v4.app.FragmentTransaction;

import android.support.v4.view.GravityCompat;

import android.support.v4.widget.DrawerLayout;

import android.support.v7.app.ActionBarDrawerToggle;

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.FragmentPagerAdapter;

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.TextView;



public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {



    /**

     * 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.FragmentStatePagerAdapter}.

     */

    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);



        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(getSupportFragmentManager());



        // Set up the ViewPager with the sections adapter.

        mViewPager = (ViewPager) findViewById(R.id.container);

        mViewPager.setAdapter(mSectionsPagerAdapter);



        mSectionsPagerAdapter.notifyDataSetChanged();





        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);

        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(

                this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);

        drawer.addDrawerListener(toggle);

        toggle.syncState();



        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);

        navigationView.setNavigationItemSelectedListener(this);





    }

@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_main, 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);

}



@SuppressWarnings("StatementWithEmptyBody")

@Override

public boolean onNavigationItemSelected(MenuItem item) {

    // Handle navigation view item clicks here.

    int id = item.getItemId();



    if (id == R.id.nav_camera) {

        // Handle the camera action

    } else if (id == R.id.nav_gallery) {



    } else if (id == R.id.nav_slideshow) {



    } else if (id == R.id.nav_manage) {



    } else if (id == R.id.nav_share) {



    } else if (id == R.id.nav_send) {



    }



    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);

    drawer.closeDrawer(GravityCompat.START);

    return true;

}





/**

 * 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) {

        //returning the current tabs

        switch (position){

            case 0:

                Tab1 tab1 = new Tab1();

                mSectionsPagerAdapter.notifyDataSetChanged();

                return tab1;

            case 1:

                Tab2 tab2 = new Tab2();

                return tab2;

            case 2:

                Tab3 tab3 = new Tab3();

                return tab3;

            default:

                throw new IllegalArgumentException("unexpected position: " + position);

        }

    }



    @Override

    public int getCount() {

        // Show 3 total pages.

        return 3;

    }

}

}

<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    xmlns:tools="http://schemas.android.com/tools"

    android:id="@+id/drawer_layout"

    android:layout_width="match_parent"

    android:layout_height="300dp"

    android:fitsSystemWindows="true"

    tools:openDrawer="start">



    <android.support.design.widget.AppBarLayout

        android:id="@+id/appbar"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"



        android:theme="@style/AppTheme.AppBarOverlay">



        <android.support.v7.widget.Toolbar

            android:id="@+id/toolbar"

            android:layout_width="match_parent"

            android:layout_height="?attr/actionBarSize"

            android:layout_weight="1"

            android:background="?attr/colorPrimary"

            app:layout_scrollFlags="scroll|enterAlways"

            app:popupTheme="@style/AppTheme.PopupOverlay"

            app:title="@string/app_name">



        </android.support.v7.widget.Toolbar>



    </android.support.design.widget.AppBarLayout>



    <android.support.v4.view.ViewPager

        android:id="@+id/container"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        app:layout_behavior="@string/appbar_scrolling_view_behavior" />



    <include

        layout="@layout/app_bar_main"

        android:layout_width="match_parent"

        android:layout_height="match_parent" />



    <android.support.design.widget.NavigationView

        android:id="@+id/nav_view"

        android:layout_width="wrap_content"

        android:layout_height="match_parent"

        android:layout_gravity="start"

        android:fitsSystemWindows="true"

        app:headerLayout="@layout/nav_header_main"

        app:menu="@menu/activity_main_drawer" />



</android.support.v4.widget.DrawerLayout>