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DrawerToggle Hamburger icon not showing

I am new to android. currently, I am making an android app with a navigation drawer. I managed to add the drawer. and when slid it works properly. but my problem is I cannot manage to add a hamburger icon.
my minimum sdk version is 17
I tried every solution given in the previous problems but didn't work.
My main activity code
package com.example.myapplication;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import androidx.appcompat.app.ActionBarDrawerToggle;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.drawerlayout.widget.DrawerLayout;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar myToolbar = (Toolbar) findViewById(R.id.my_toolbar);
setSupportActionBar(myToolbar);
getSupportActionBar().setDisplayShowTitleEnabled(false);
getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setDefaultDisplayHomeAsUpEnabled(true);
DrawerLayout drawer =(DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, drawer, R.string.open, R.string.close);
drawer.addDrawerListener(toggle);
toggle.setDrawerIndicatorEnabled(true);
toggle.syncState();
}
// Menu icons are inflated just as they were with actionbar
#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;
}
}
my xml code
<?xml version="1.0" encoding="utf-8"?>
<androidx.drawerlayout.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="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="left">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#E0E0E0"
tools:context=".MainActivity"
android:fitsSystemWindows="true">
<androidx.appcompat.widget.Toolbar
android:id="#+id/my_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#null"
android:theme="#style/ThemeOverlay.AppCompat.ActionBar"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
</RelativeLayout>
<com.google.android.material.navigation.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
app:menu="#menu/activity_main_drawer"
android:fitsSystemWindows="true"/>
</androidx.drawerlayout.widget.DrawerLayout>

Everything looks fine, You just need to pass the toolbar object into the ActionBarDrawerToggle constructer as a third argument.
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, drawer, myToolbar, R.string.open, R.string.close);
here

Check out the following example:
MainActivity.class
public class MainActivity extends AppCompatActivity {
private final String TAG = MainActivity.class.getSimpleName();
private ActionBarDrawerToggle toggle = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar myToolbar = (Toolbar) findViewById(R.id.my_toolbar);
setSupportActionBar(myToolbar);
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
final ActionBar actionBar = getSupportActionBar();
if (actionBar != null) {
actionBar.setDisplayShowTitleEnabled(false);
actionBar.setHomeButtonEnabled(true);
actionBar.setDefaultDisplayHomeAsUpEnabled(true);
toggle = new ActionBarDrawerToggle(this, drawer, myToolbar, R.string.open, R.string.close) {
public void onDrawerClosed(View view) {
supportInvalidateOptionsMenu();
}
public void onDrawerOpened(View drawerView) {
supportInvalidateOptionsMenu();
}
};
toggle.setDrawerIndicatorEnabled(true);
drawer.addDrawerListener(toggle);
toggle.syncState();
}
}
#Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
if(toggle != null) {
toggle.syncState();
}
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
if (toggle != null) {
toggle.onConfigurationChanged(newConfig);
}
}
}
activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<androidx.drawerlayout.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="match_parent"
android:fitsSystemWindows="true"
tools:context=".MainActivity">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#E0E0E0"
android:fitsSystemWindows="true">
<androidx.appcompat.widget.Toolbar
android:id="#+id/my_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#null"
android:theme="#style/ThemeOverlay.AppCompat.ActionBar"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
</RelativeLayout>
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Text View"
android:textSize="35sp"
android:background="#color/colorAccent"
android:layout_gravity="start"
android:gravity="center">
</TextView>
</androidx.drawerlayout.widget.DrawerLayout>

How to use own layout for navigation drawer activity instead of auto generated layout?

I have a navigation drawer activity, that have automatically generated these activity_student_home2, app_bar_student_home, content_student_home, nav_header_student_home layout files. I have separately created activity_student_home layout.By default the activity java class has the acitivity_student_home2 layout as setContentView. But instead, I want to use the acitivity_student_home layout. If I try to change the setContentView to acitivity_student_home then my navigation drawer view does not work. How can I use the acitivity_student_home layout as setContentView?
activity_student_home layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/app_back"
tools:context="bd.edu.bubt.regup.StudentHomeActivity">
<LinearLayout
android:layout_centerHorizontal="true"
android:layout_centerVertical="false"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="60dp"
android:id="#+id/linearLayout">
<TextView
android:id="#+id/showtext"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="300dp"
android:gravity="center"
android:text="Demo"
android:textSize="24dp"
android:textStyle="bold" />
</LinearLayout>
</RelativeLayout>
activity_student_home2 layout:
<?xml version="1.0" encoding="utf-8"?>
<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="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="#layout/app_bar_student_home"
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_student_home"
app:menu="#menu/activity_student_home2_drawer" />
</android.support.v4.widget.DrawerLayout>
app_bar_student_home layout:
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 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:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/app_back"
tools:context="bd.edu.bubt.regup.StudentHomeActivity">
<android.support.design.widget.AppBarLayout
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:background="?attr/colorPrimary"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<include layout="#layout/content_student_home" />
</android.support.design.widget.CoordinatorLayout>
StudentHomeActivity java class:
import android.app.ProgressDialog;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.view.View;
import android.support.design.widget.NavigationView;
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.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
public class StudentHomeActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
String name, id, dept, intake, sec, mail;
TextView showtext;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_student_home2);
showtext = (TextView) findViewById(R.id.showtext); //content of activity_student_home
showtext.setText("Registration is open"); //does not work. Null pointer exception.
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
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 void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#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.menu_bvault) {
// Handle the camera action
} else if (id == R.id.menu_account) {
} else if (id == R.id.menu_pass_change) {
} else if (id == R.id.menu_logout) {
} else if (id == R.id.menu_about) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}

Your activity_student_home does not include your DrawerLayout
This is missing
<include
layout="#layout/app_bar_student_home"
android:layout_width="match_parent"
android:layout_height="match_parent" />

The correct way to do what you wish is (if I understand what you are asking for correctly) to use fragments
Inside your app_bar_student_home.xml replace
<include layout="#layout/content_student_home" />
with something like this
<FrameLayout
android:id="#+id/content"
android:layout_width="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:layout_height="match_parent"/>
Then create fragments whose content you wish to show (let's say FragmentA, FragmentB) and set their contentview to the different layouts you wish to show
when you wish to change the content for your activity you can do something like
getSupportFragmentManager().beginTransaction().replace(R.id.content, new FragmentA()).commit();
there's a lot more to it than this,
for example when you wish to send a click event from the fragment to your activity you have to use getActivity() and cast it to the class of your MainActivity or use an interface (preferable)
you can check out this tutorial which should help you
http://www.androiddocs.com/training/basics/fragments/index.html

How to implement Collapsabletoolbar with ViewPager?

I am trying to implement Collapsabletoolbar, here is my code.
Main.xml
xmlns:ads="http://schemas.android.com/apk/res-auto"
android:id="#+id/drawer_layout"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:fitsSystemWindows="true">
<android.support.design.widget.CoordinatorLayout
android:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|enterAlways|enterAlwaysCollapsed"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginStart="48dp"
app:expandedTitleMarginEnd="64dp">
<ImageView
android:id="#+id/backdrop"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:src="#drawable/hgj_nav"
app:layout_scrollFlags="scroll|enterAlways|enterAlwaysCollapsed"
android:fitsSystemWindows="true"
app:layout_collapseMode="parallax" />
<android.support.v7.widget.Toolbar
android:id="#+id/tool_bar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:layout_collapseMode="pin" />
<android.support.design.widget.TabLayout
android:id="#+id/tablayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"/>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end|bottom"
android:layout_margin="#dimen/fab_margin"
android:src="#drawable/ic_done" />
</android.support.design.widget.CoordinatorLayout>
<android.support.design.widget.NavigationView
android:id="#+id/navigation_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="#009688"
app:headerLayout="#layout/drawer_header"
app:menu="#menu/drawer"/>
</android.support.v4.widget.DrawerLayout>
In java:
public class MainActivityTab extends AppCompatActivity {
// Declaring Your View and Variables
Toolbar toolbar;
CharSequence HGJTitles[]={"Recent News","Category"};
int HGJNumboftabs =2;
private DrawerLayout mDrawerLayout;
private AdView mAdView;
private StartAppAd startAppAd = new StartAppAd(this);
private InterstitialAd interstitial;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
StartAppAd.init(this, getString(R.string.startapp_dev_id), getString(R.string.startapp_app_id));
setContentView(R.layout.activity_main_tab);
// Creating The Toolbar and setting it as the Toolbar for the activity
toolbar = (Toolbar) findViewById(R.id.tool_bar);
setSupportActionBar(toolbar);
ActionBar actionBar = getSupportActionBar();
actionBar.setHomeAsUpIndicator(R.drawable.ic_menu);
actionBar.setDisplayHomeAsUpEnabled(true);
CollapsingToolbarLayout collapsingToolbar =
(CollapsingToolbarLayout) findViewById(R.id.collapsing_toolbar);
collapsingToolbar.setTitle("");
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
NavigationView navigationView = (NavigationView) findViewById(R.id.navigation_view);
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
menuItem.setChecked(true);
mDrawerLayout.closeDrawers();
Toast.makeText(MainActivityTab.this, menuItem.getTitle(), Toast.LENGTH_LONG).show();
return true;
}
});
StartAppAd.showSlider(this);
mAdView = (AdView) findViewById(R.id.adView);
mAdView.loadAd(new AdRequest.Builder().build());
// Prepare the Interstitial Ad
interstitial = new InterstitialAd(MainActivityTab.this);
// Insert the Ad Unit ID
interstitial.setAdUnitId(getString(R.string.admob_interstitial_id));
AdRequest adRequest = new AdRequest.Builder().build();
// Load ads into Interstitial Ads
interstitial.loadAd(adRequest);
// Prepare an Interstitial Ad Listener
interstitial.setAdListener(new AdListener() {
public void onAdLoaded() {
// Call displayInterstitial() function
displayInterstitial();
}
});
// Creating The ViewPagerAdapter and Passing Fragment Manager, Titles fot the Tabs and Number Of Tabs.
HitGovtJobAdapter adapter = new HitGovtJobAdapter(getSupportFragmentManager(),HGJTitles,HGJNumboftabs);
ViewPager viewPager = (ViewPager)findViewById(R.id.pager);
viewPager.setAdapter(adapter);
TabLayout tabLayout = (TabLayout)findViewById(R.id.tablayout);
tabLayout.setupWithViewPager(viewPager);
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
// TODO Auto-generated method stub
if (keyCode == KeyEvent.KEYCODE_BACK) {
MainActivityTab.this.finish();
return true;
}
return super.onKeyDown(keyCode, event);
}
static class HitGovtJobAdapter extends FragmentStatePagerAdapter {
CharSequence HGJTitles[]; // This will Store the Titles of the Tabs which are Going to be passed when ViewPagerAdapter is created
int HGJNumbOfTabs; // Store the number of tabs, this will also be passed when the ViewPagerAdapter is created
// Build a Constructor and assign the passed Values to appropriate values in the class
public HitGovtJobAdapter(FragmentManager fm,CharSequence hgjTitles[], int hgjTabNum) {
super(fm);
this.HGJTitles = hgjTitles;
this.HGJNumbOfTabs = hgjTabNum;
}
//This method return the fragment for the every position in the View Pager
#Override
public Fragment getItem(int position) {
if(position == 0) // if the position is 0 we are returning the First tab
{
News_Recent newsRecent = new News_Recent();
return newsRecent;
}
else // As we are having 2 tabs if the position is now 0 it must be 1 so we are returning second tab
{
News_Category newsCategory = new News_Category();
return newsCategory;
}
}
// This method return the titles for the Tabs in the Tab Strip
#Override
public CharSequence getPageTitle(int position) {
return HGJTitles[position];
}
// This method return the Number of tabs for the tabs Strip
#Override
public int getCount() {
return HGJNumbOfTabs;
}
}
public static class HitGovtJobFragment extends Fragment {
private static final String TAB_POSITION = "tab_position";
public HitGovtJobFragment() {
}
public static HitGovtJobFragment newInstance(int tabPosition) {
HitGovtJobFragment fragment = new HitGovtJobFragment();
Bundle args = new Bundle();
args.putInt(TAB_POSITION, tabPosition);
fragment.setArguments(args);
return fragment;
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem menuItem) {
switch (menuItem.getItemId()) {
case R.id.refresh:
finish();
startActivity(getIntent());
overridePendingTransition(R.anim.open_next, R.anim.close_next);
return true;
case R.id.menu_favorite:
startActivity(new Intent(getApplicationContext(), News_Favorite.class));
return true;
case R.id.menu_about:
Intent about = new Intent(getApplicationContext(), About_Us.class);
startActivity(about);
return true;
case R.id.menu_moreapp:
startActivity(new Intent(Intent.ACTION_VIEW,
Uri.parse(getString(R.string.play_more_apps))));
return true;
case R.id.menu_rateapp:
final String appName = getApplicationContext().getPackageName();
try {
startActivity(new Intent(Intent.ACTION_VIEW,
Uri.parse("market://details?id=" + appName)));
} catch (android.content.ActivityNotFoundException anfe) {
startActivity(new Intent(
Intent.ACTION_VIEW,
Uri.parse("http://play.google.com/store/apps/details?id="
+ appName)));
}
return true;
default:
return super.onOptionsItemSelected(menuItem);
}
}
#Override
protected void onPause() {
mAdView.pause();
super.onPause();
}
#Override
protected void onResume() {
super.onResume();
mAdView.resume();
startAppAd.onResume();
}
#Override
protected void onDestroy() {
mAdView.destroy();
super.onDestroy();
}
public void displayInterstitial() {
// If Ads are loaded, show Interstitial else show nothing.
if (interstitial.isLoaded()) {
interstitial.show();
}
}
}
But with above code toolbar not collapsed and viewpager scrolls freely. See this image.
And tablayout also not properly placed.
Any idea how can I fix this problem?
Thank you very much in advance.

Use this layout:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/r`enter code here`es/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"`enter code here`
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="256dp"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<android.support.design.widget.TabLayout
android:id="#+id/tabLayout"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:layout_gravity="bottom"
android:background="#color/colorAccent"
app:tabMode="scrollable"
app:tabContentStart="72dp" />
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:layout_collapseMode="parallax" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/view_pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end|bottom"
android:layout_margin="8dp"
android:src="#drawable/ic_menu_camera"
app:layout_anchor="#id/tabLayout"
app:layout_anchorGravity="center|left|start"
app:fabSize="mini"
app:borderWidth="0dp" />
</android.support.design.widget.CoordinatorLayout>
<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>
and than your activity
Note ItemFragment can be your fragment having list ItemFragment i am not enclosing this fragment:
package com.example.a61378.navigation;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.design.widget.TabLayout;
import android.support.v4.app.FragmentManager;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.support.design.widget.NavigationView;
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.view.Menu;
import android.view.MenuItem;
import com.example.a61378.navigation.dummy.DummyContent;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener,ItemFragment.OnListFragmentInteractionListener {
ViewPager mViewPager;
TabLayout mTabLayout;
String tabPageTitles[] = {"Tab1", "Tab2"};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
mViewPager = (ViewPager) findViewById(R.id.view_pager);
mTabLayout = (TabLayout) findViewById(R.id.tabLayout);
mTabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
FragmentManager fragment =getSupportFragmentManager();
FragmentHomePagerAdapter fragmentHomePagerAdapter = new FragmentHomePagerAdapter(fragment, tabPageTitles.length);
mViewPager.setAdapter(fragmentHomePagerAdapter);
mTabLayout.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();
}
});
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.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
#Override
public void onListFragmentInteraction(DummyContent.DummyItem item) {
}
class FragmentHomePagerAdapter extends android.support.v4.app.FragmentPagerAdapter {
private int mTabCount;
public FragmentHomePagerAdapter(FragmentManager fm, int tabCount) {
super(fm);
mTabCount = tabCount;
}
#Override
public android.support.v4.app.Fragment getItem(int position) {
ItemFragment ViewGroceryfragment = ItemFragment.newInstance(10);
return ViewGroceryfragment;// Fragment # 0 - This will show FirstFragment
}
#Override
public CharSequence getPageTitle(int position) {
return tabPageTitles[position] ;
}
#Override
public int getCount() {
return mTabCount;
}
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.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;
}
}

You can use Nested scrollview to achieve this
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/white"
android:fillViewport="true"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/colorPrimary"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:tabGravity="fill"
app:tabIndicatorColor="#color/dark_orange"
app:tabIndicatorHeight="4dp"
app:tabMode="scrollable"
/>
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
I have just did it in my project and its working like a boss :P

Edit 1
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/drawer_layout"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:fitsSystemWindows="true">
<android.support.design.widget.CoordinatorLayout
android:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|enterAlways|enterAlwaysCollapsed"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginStart="48dp"
app:expandedTitleMarginEnd="64dp">
<ImageView
android:id="#+id/backdrop"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:src="#drawable/hgj_nav"
app:layout_scrollFlags="scroll|enterAlways|enterAlwaysCollapsed"
android:fitsSystemWindows="true"
app:layout_collapseMode="parallax" />
<android.support.v7.widget.Toolbar
android:id="#+id/tool_bar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:layout_collapseMode="pin" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<LinearLayout
android:id="#+id/linear"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:elevation="4dp"
android:orientation="vertical"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
>
<android.support.design.widget.TabLayout
android:id="#+id/tablayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"/>
<android.support.v4.view.ViewPager
android:id="#+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</LinearLayout>
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end|bottom"
android:layout_margin="#dimen/fab_margin"
android:src="#drawable/ic_done" />
</android.support.design.widget.CoordinatorLayout>
<android.support.design.widget.NavigationView
android:id="#+id/navigation_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="#009688"
app:headerLayout="#layout/drawer_header"
app:menu="#menu/drawer"/>
</android.support.v4.widget.DrawerLayout>

I made a sample project which might help you in what you are looking for it has navigation view collapsing toolbar with viewpager and tabs over viewpager.

Navigation View in drawer layout-menu items do not appear

This is the java file which seems to work fine is there anything im missing here?
import android.os.Bundle;
import android.support.design.widget.NavigationView;
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.view.MenuItem;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import com.mapbox.mapboxsdk.MapboxAccountManager;
import com.mapbox.mapboxsdk.maps.MapView;
import com.mapbox.mapboxsdk.maps.MapboxMap;
import com.mapbox.mapboxsdk.maps.OnMapReadyCallback;
public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
public View decorView ;
private MapView mapView;
ActionBarDrawerToggle toggle;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
decorView = this.getWindow().getDecorView();
decorView.setSystemUiVisibility(
View.SYSTEM_UI_FLAG_LAYOUT_STABLE
| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
| View.SYSTEM_UI_FLAG_HIDE_NAVIGATION // hide nav bar
| View.SYSTEM_UI_FLAG_FULLSCREEN // hide status bar
| View.SYSTEM_UI_FLAG_IMMERSIVE);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
// Mapbox access token is configured here. This needs to be called either in your application
// object or in the same activity which contains the mapview.
MapboxAccountManager.start(this, getString(R.string.accesstoken1));
// This contains the MapView in XML and needs to be called after the account manager
setContentView(R.layout.activity_main);
mapView = (MapView) findViewById(R.id.mapview);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(new OnMapReadyCallback() {
#Override
public void onMapReady(MapboxMap mapboxMap) {
// Customize map with markers, polylines, etc.
}
});
//addDrawerItems();
// mPlanetTitles = getResources().getStringArray(R.array.planets_array);
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
toggle =new ActionBarDrawerToggle(this, drawer,
R.string.navigation_drawer_open, R.string.navigation_drawer_close) {
/** Called when a drawer has settled in a completely closed state. */
public void onDrawerClosed(View view) {
super.onDrawerClosed(view);
//getActionBar().setTitle(mTitle);
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
/** Called when a drawer has settled in a completely open state. */
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
//getActionBar().setTitle(mDrawerTitle);
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
};
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
// Set the list's click listener
//mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
}
// Add the mapView lifecycle to the activity's lifecycle methods
#Override
public void onResume() {
super.onResume();
mapView.onResume();
}
#Override
public void onPause() {
super.onPause();
mapView.onPause();
}
#Override
public void onLowMemory() {
super.onLowMemory();
mapView.onLowMemory();
}
#Override
protected void onDestroy() {
super.onDestroy();
mapView.onDestroy();
}
/*#Override
public void onWindowFocusChanged(boolean hasFocus) {
super.onWindowFocusChanged(hasFocus);
if (hasFocus) {
decorView.setSystemUiVisibility(
View.SYSTEM_UI_FLAG_LAYOUT_STABLE
| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
| View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_FULLSCREEN
| View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);}
}*/
#Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mapView.onSaveInstanceState(outState);
}
#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;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Pass the event to ActionBarDrawerToggle, if it returns
// true, then it has handled the app icon touch event
if (toggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
toggle.syncState();
}
}
and here is my xml which has a navigationview in the drawerlayout
<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"
xmlns:mapbox="http://schemas.android.com/apk/res-auto"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<android.support.design.widget.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="start"
android:visibility="visible"
android:fitsSystemWindows="true"
app:headerLayout="#layout/nav_header_main2"
app:menu="#menu/navigation_menu"/>
<include
layout="#layout/app_bar_main4"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<com.mapbox.mapboxsdk.maps.MapView
android:id="#+id/mapview"
android:layout_width="match_parent"
android:layout_height="match_parent"
mapbox:style_url="mapbox://styles/amariv/ciz4jb3i0005m2spdp1p2fkfi"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true" />
</android.support.v4.widget.DrawerLayout>
menu which has each item that i want in the menu but doesnt appear
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:id="#+id/MyEvents"
android:title="My Locations"
/>
<item
android:id="#+id/AddEvent"
android:title="Add Event"
/>
<item
android:id="#+id/Navpath"
android:title="Directions"
/>
<item
android:id="#+id/LocalizeView"
android:title="Localize View"
/>
</menu>

the navigation view will be drawn below the content of the activity, your navigation view element should be written last in the drawerLayout.
<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"
xmlns:mapbox="http://schemas.android.com/apk/res-auto"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="#layout/app_bar_main4"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<com.mapbox.mapboxsdk.maps.MapView
android:id="#+id/mapview"
android:layout_width="match_parent"
android:layout_height="match_parent"
mapbox:style_url="mapbox://styles/amariv/ciz4jb3i0005m2spdp1p2fkfi"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true" />
<android.support.design.widget.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="start"
android:visibility="visible"
android:fitsSystemWindows="true"
app:headerLayout="#layout/nav_header_main2"
app:menu="#menu/navigation_menu"/>
</android.support.v4.widget.DrawerLayout>

How do I fix: No view found for id 0x7f0d00aa?

I've seen people with the same issue and they said that there is something wrong with the .replace() and the way I've constructed the way the fragment and container are written using the: fragmentManager.beginTransaction().replace
(R.id.container, new Fragment()).commit();
And that I must do it some other way, which I implemented into my code but I still got the Error.
ERROR:
E/AndroidRuntime: FATAL EXCEPTION: main
Process: mcshreker.pocketmath, PID: 3215
java.lang.IllegalArgumentException: No view found for id 0x7f0d00aa (mcshreker.pocketmath:id/content_main_container) for fragment secondFragment{bf0f022 #0 id=0x7f0d00aa}
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1292)
at android.support.v4.app.FragmentManagerImpl.moveFragmentsToInvisible(FragmentManager.java:2323)
at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2136)
at android.support.v4.app.FragmentManagerImpl.optimizeAndExecuteOps(FragmentManager.java:2092)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1998)
at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:709)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Code (Main Activity)
package mcshreker.pocketmath;
import android.app.FragmentTransaction;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.RequiresApi;
import android.support.v4.app.FragmentManager;
import android.support.design.widget.NavigationView;
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.view.Menu;
import android.view.MenuItem;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
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.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.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
#RequiresApi(api = Build.VERSION_CODES.M)
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
return super.onOptionsItemSelected(item);
FragmentManager fragmentManager = getSupportFragmentManager();
if (id == R.id.nav_first_layout) {
fragmentManager.beginTransaction().replace
(R.id.content_main_container, new firstFragment()).commit();
// Handle the camera action
}
} else if (id == R.id.nav_second_layout) {
fragmentManager.beginTransaction().replace
(R.id.content_main_container, new secondFragment()).commit();
} else if (id == R.id.nav_third_layout) {
fragmentManager.beginTransaction().replace
(R.id.content_main_container, new thirdFragment()).commit();
} else if (id == R.id.nav_fourth_layout) {
fragmentManager.beginTransaction().replace
(R.id.content_main_container, new fourthFragment()).commit();
} else if (id == R.id.nav_fifth_layout) {
fragmentManager.beginTransaction().replace
(R.id.content_main_container, new fifthFragment()).commit();
} else if (id == R.id.nav_sixth_layout) {
fragmentManager.beginTransaction().replace
(R.id.content_main_container, new sixthFragment()).commit();
} else if (id == R.id.nav_seventh_layout) {
fragmentManager.beginTransaction().replace
(R.id.content_main_container, new seventhFragment()).commit();
} else if (id == R.id.nav_eighth_layout) {
fragmentManager.beginTransaction().replace
(R.id.content_main_container, new eighthFragment()).commit();
} else if (id == R.id.nav_ninth_layout) {
fragmentManager.beginTransaction().replace
(R.id.content_main_container, new ninthFragment()).commit();
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
HERE is my content_main_container XML:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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/content_main_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context="mcshreker.pocketmath.MainActivity">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:srcCompat="#drawable/e"
android:id="#+id/imageView7"
android:layout_marginTop="96dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:contentDescription=""
tools:ignore="ContentDescription" />
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:srcCompat="#drawable/welcome"
android:id="#+id/imageView2"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
tools:ignore="ContentDescription" />
</LinearLayout>
</RelativeLayout>
Here is my Activity_main XML:
<?xml version="1.0" encoding="utf-8"?>
<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="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<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>
Help is greatly appreciated!

No view found for id 0x7f0d00aa (mcshreker.pocketmath:id/content_main_container)
check if content_main_container is defined in your activity_main layout