title: Bottom Sheet not opening with the NavigationDrawer click
body: <p>I have two navigation drawers and a bottom sheet in my app. I want to expand the bottom sheet by click an item from a navigation drawer. Navigation Drawers work really fine.</p>
  
  <p><strong>updated xml....</strong></p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;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_widget"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:clickable="true"
      android:focusableInTouchMode="true"&gt;
  
      &lt;android.support.design.widget.CoordinatorLayout xmlns:app="http://schemas.android.com/apk/res-auto"
          android:layout_width="match_parent"
          android:layout_height="match_parent"&gt;
  
          &lt;RelativeLayout
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:background="@color/bg_register"
              app:layout_behavior="@string/appbar_scrolling_view_behavior"
              tools:context="com.ceatkelanisrilanka.dushanmadushanka.ceat.CeatMainActivity"
              tools:showIn="@layout/activity_ceat_main"&gt;
  
              &lt;include
                  android:id="@+id/app_bar"
                  layout="@layout/app_toolbar_welcome_menu"&gt;&lt;/include&gt;
  
              &lt;com.rey.material.widget.ProgressView
                  android:id="@+id/pViewew"
                  cpd_strokeColor="@android:color/holo_red_dark"
                  cpd_strokeSecondaryColor="@android:color/holo_blue_bright"
                  cpd_strokeSize="25dp"
                  android:layout_width="50dp"
                  android:layout_height="50dp"
                  android:layout_alignTop="@+id/txtMonthSn"
                  android:layout_centerHorizontal="true"
                  app:pv_autostart="true"
                  app:pv_circular="true"
                  app:pv_progressMode="indeterminate"
                  app:pv_progressStyle="@style/Material.Drawable.CircularProgress" /&gt;
  
              &lt;TextView
                  android:id="@+id/txtMonth"
                  android:layout_width="wrap_content"
                  android:layout_height="wrap_content"
                  android:layout_alignLeft="@+id/app_bar"
                  android:layout_alignStart="@+id/app_bar"
                  android:layout_below="@+id/app_bar"
                  android:layout_marginTop="2dp"
                  android:paddingLeft="10dp"
                  android:text="Month"
                  android:textColor="#ffffff"
                  android:textSize="24sp" /&gt;
  
              &lt;TextView
                  android:id="@+id/txtMonthSn"
                  android:layout_width="wrap_content"
                  android:layout_height="wrap_content"
                  android:layout_alignParentEnd="true"
                  android:layout_alignParentRight="true"
                  android:layout_alignTop="@+id/txtMonth"
                  android:paddingRight="10dp"
                  android:text="MonthSn"
                  android:textColor="#ffffff"
                  android:textSize="24sp" /&gt;
  
  
              &lt;TextView
                  android:id="@+id/yearTextV"
                  android:layout_width="wrap_content"
                  android:layout_height="wrap_content"
                  android:layout_alignEnd="@+id/txtMonth"
                  android:layout_alignRight="@+id/txtMonth"
                  android:layout_below="@+id/txtMonth"
                  android:text="year"
                  android:textAppearance="?android:attr/textAppearanceSmall"
                  android:textColor="#ffffff" /&gt;
  
              &lt;RelativeLayout
                  android:id="@+id/relativeLayout2"
                  android:layout_width="wrap_content"
                  android:layout_height="wrap_content"
                  android:layout_above="@+id/relativeLayout"
                  android:layout_marginBottom="18dp"&gt;
  
                  &lt;com.github.lzyzsd.circleprogress.ArcProgress
                      android:id="@+id/arc_progress"
                      android:layout_width="220dp"
                      android:layout_height="220dp"
                      android:layout_alignParentLeft="true"
                      android:layout_alignParentStart="true"
                      android:layout_alignParentTop="true"
                      android:layout_marginLeft="20dp"
                      android:layout_marginStart="20dp"
                      android:padding="5dp" /&gt;
  
              &lt;/RelativeLayout&gt;
  
              &lt;!-- &lt;com.github.lzyzsd.circleprogress.ArcProgress
                   android:id="@+id/arc_progress_two"
                   android:layout_width="100dp"
                   android:layout_height="100dp"
                   android:layout_alignParentEnd="true"
                   android:layout_alignParentRight="true"
                   android:layout_centerVertical="true"
                   android:layout_marginEnd="20dp"
                   android:layout_marginRight="20dp"
                   android:padding="5dp"
                   app:arc_bottom_text="Precentage" /&gt;--&gt;
              &lt;LinearLayout
                  android:layout_width="wrap_content"
                  android:layout_height="wrap_content"
                  android:layout_alignBottom="@+id/relativeLayout2"
                  android:layout_alignParentEnd="true"
                  android:layout_alignParentRight="true"
                  android:layout_marginBottom="22dp"
                  android:layout_marginEnd="20dp"
                  android:layout_marginRight="20dp"
                  android:gravity="center"
                  android:orientation="vertical"&gt;
  
                  &lt;com.hookedonplay.decoviewlib.DecoView
                      android:id="@+id/dynamicArcView"
                      android:layout_width="100dp"
                      android:layout_height="100dp"
                      android:padding="5dp" /&gt;
  
                  &lt;TextView
                      android:id="@+id/pView"
                      android:layout_width="wrap_content"
                      android:layout_height="wrap_content"
                      android:text="0 %"
                      android:textColor="#4B73C4"
                      android:textSize="20sp" /&gt;
  
                  &lt;TextView
                      android:layout_width="wrap_content"
                      android:layout_height="wrap_content"
                      android:text="Precentage"
                      android:textColor="#4B73C4"
                      android:textSize="15sp" /&gt;
  
              &lt;/LinearLayout&gt;
  
  
              &lt;RelativeLayout
                  android:id="@+id/relativeLayout"
                  android:layout_width="match_parent"
                  android:layout_height="wrap_content"
                  android:layout_alignParentBottom="true"
                  android:layout_alignParentLeft="true"
                  android:layout_alignParentStart="true"
                  android:layout_marginBottom="23dp"
                  android:paddingLeft="5dp"
                  android:paddingRight="5dp"&gt;
  
                  &lt;TextView
                      android:id="@+id/txtMtar"
                      android:layout_width="wrap_content"
                      android:layout_height="wrap_content"
                      android:layout_alignParentLeft="true"
                      android:layout_alignParentStart="true"
                      android:layout_alignTop="@+id/txtTarget"
                      android:padding="5dp"
                      android:text="Monthly Target"
                      android:textAppearance="?android:attr/textAppearanceMedium"
                      android:textColor="#ffffff" /&gt;
  
                  &lt;TextView
                      android:id="@+id/txtPre"
                      android:layout_width="wrap_content"
                      android:layout_height="wrap_content"
                      android:layout_alignParentLeft="true"
                      android:layout_alignParentStart="true"
                      android:layout_below="@+id/txtMAch"
                      android:layout_marginTop="40dp"
                      android:padding="5dp"
                      android:text="Percentage"
                      android:textAppearance="?android:attr/textAppearanceMedium"
                      android:textColor="#ffffff" /&gt;
  
                  &lt;TextView
                      android:id="@+id/txtMAch"
                      android:layout_width="wrap_content"
                      android:layout_height="wrap_content"
                      android:layout_alignParentLeft="true"
                      android:layout_alignParentStart="true"
                      android:layout_marginTop="80dp"
                      android:padding="5dp"
                      android:text="Achievment"
                      android:textAppearance="?android:attr/textAppearanceMedium"
                      android:textColor="#ffffff" /&gt;
  
                  &lt;TextView
                      android:id="@+id/txtTarget"
                      android:layout_width="wrap_content"
                      android:layout_height="wrap_content"
                      android:layout_above="@+id/txtAchievement"
                      android:layout_alignLeft="@+id/txtAchievement"
                      android:layout_alignStart="@+id/txtAchievement"
                      android:layout_marginBottom="35dp"
                      android:padding="5dp"
                      android:text="M"
                      android:textAppearance="?android:attr/textAppearanceMedium"
                      android:textColor="#ffffff" /&gt;
  
                  &lt;TextView
                      android:id="@+id/txtAchievement"
                      android:layout_width="wrap_content"
                      android:layout_height="wrap_content"
                      android:layout_above="@+id/txtPre"
                      android:layout_centerHorizontal="true"
                      android:padding="5dp"
                      android:text="M"
                      android:textAppearance="?android:attr/textAppearanceMedium"
                      android:textColor="#ffffff" /&gt;
  
                  &lt;TextView
                      android:id="@+id/txtCollection"
                      android:layout_width="wrap_content"
                      android:layout_height="wrap_content"
                      android:layout_alignBottom="@+id/txtPre"
                      android:layout_alignLeft="@+id/txtAchievement"
                      android:layout_alignStart="@+id/txtAchievement"
                      android:padding="5dp"
                      android:text="M"
                      android:textAppearance="?android:attr/textAppearanceMedium"
                      android:textColor="#ffffff" /&gt;
  
                  &lt;Button
                      android:id="@+id/bValue"
                      style="?android:attr/buttonStyleSmall"
                      android:layout_width="120dp"
                      android:layout_height="wrap_content"
                      android:layout_alignBaseline="@+id/txtAchievement"
                      android:layout_alignBottom="@+id/txtAchievement"
                      android:layout_alignLeft="@+id/bTon"
                      android:layout_alignStart="@+id/bTon"
                      android:text="Value"
                      android:textColor="@color/border_gray" /&gt;
  
                  &lt;Button
                      android:id="@+id/bTon"
                      style="?android:attr/buttonStyleSmall"
                      android:layout_width="120dp"
                      android:layout_height="wrap_content"
                      android:layout_alignParentEnd="true"
                      android:layout_alignParentRight="true"
                      android:layout_alignTop="@+id/txtTarget"
                      android:text="Ton"
                      android:textColor="@color/border_gray" /&gt;
  
                  &lt;Button
                      android:id="@+id/bCollection"
                      style="?android:attr/buttonStyleSmall"
                      android:layout_width="120dp"
                      android:layout_height="wrap_content"
                      android:layout_alignBottom="@+id/txtCollection"
                      android:layout_alignLeft="@+id/bValue"
                      android:layout_alignStart="@+id/bValue"
                      android:text="Collection"
                      android:textColor="@color/border_gray" /&gt;
  
              &lt;/RelativeLayout&gt;
  
          &lt;/RelativeLayout&gt;
  
  
          &lt;include
              android:id="@+id/bottom_sheet"
              layout="@layout/bottom_sheet" /&gt;
  
      &lt;/android.support.design.widget.CoordinatorLayout&gt;
  
      &lt;fragment
          android:id="@+id/fragment_navigation_drawer"
          android:name="com.ceatkelanisrilanka.dushanmadushanka.ceat.fragments.NavigationDrawerFragment"
          android:layout_width="@dimen/nav_drawer_width"
          android:layout_height="match_parent"
          android:layout_gravity="start"
          app:layout="@layout/fragment_navigation_drawer"
          tools:layout="@layout/fragment_navigation_drawer"&gt;&lt;/fragment&gt;
  
      &lt;fragment
          android:id="@+id/month_navigation_drawer"
          android:name="com.ceatkelanisrilanka.dushanmadushanka.ceat.fragments.MonthNavigationDrawerFragment"
          android:layout_width="@dimen/month_nav_drawer_width"
          android:layout_height="match_parent"
          android:layout_gravity="end"
          app:layout="@layout/month_navigation_drawer"
          tools:layout="@layout/month_navigation_drawer"&gt;&lt;/fragment&gt;
  
  &lt;/android.support.v4.widget.DrawerLayout&gt;
  </code></pre>
  
  <p>My MonthNavigationDrawerFragment recyclerview click</p>
  
  <pre><code>recyclerView.addOnItemTouchListener(new RecycleTouchListner(getActivity(), recyclerView, new ClickListener() {
              @Override
              public void onClick(View view, int position) {
                  switch (position) {
                      case 0:
                          welcomeMenu.openBottomSheet();
                          mDrawerlayout.closeDrawers();
                          break;
  
                      case 1:
                       ......
                  }
              }
  
          }));
          return vieww;
      }
  </code></pre>
  
  <p>My WelcomeMenu class</p>
  
  <pre><code>    public class WelcomeMenu extends AppCompatActivity {
  
          @Override
          protected void onCreate(Bundle savedInstanceState) {
              super.onCreate(savedInstanceState);
              setContentView(R.layout.welcome_menu);
  
              vollySingleton = VollySingleton.getsInstance();
              requestQueue = vollySingleton.getmRequestQueue();
  
              typeface = Typeface.createFromAsset(getAssets(), "helvr.ttf");
              snTypeFace = Typeface.createFromAsset(getAssets(), "DL_PARAS.TTF");
              welcomScreenTypeface = Typeface.createFromAsset(getAssets(), "productsans.ttf");
  
              progressView = (ProgressView) findViewById(R.id.pViewew);
  
              bottomSheet = findViewById(R.id.bottom_sheet);
              bottomSheetBehavior = BottomSheetBehavior.from(bottomSheet);
              initState = BottomSheetBehavior.STATE_COLLAPSED;
  
              bottomSheet.post(new Runnable() {
                  @Override
                  public void run() {
                      bottomSheetBehavior.setState(initState);
                  }
              });
  
              toolbar = (Toolbar) findViewById(R.id.app_bar);
              setSupportActionBar(toolbar);
              getSupportActionBar().setDisplayHomeAsUpEnabled(true);
              getSupportActionBar().setTitle("Achivements");
  
              NavigationDrawerFragment navigationDrawerFragment = (NavigationDrawerFragment) getSupportFragmentManager().findFragmentById(R.id.fragment_navigation_drawer);
              navigationDrawerFragment.setUp(R.id.fragment_navigation_drawer, (DrawerLayout) findViewById(R.id.drawer_layout_widget), toolbar);
  
              MonthNavigationDrawerFragment monthNavigationDrawerFragment = (MonthNavigationDrawerFragment) getSupportFragmentManager().findFragmentById(R.id.month_navigation_drawer);
              monthNavigationDrawerFragment.setUp(R.id.month_navigation_drawer, (DrawerLayout) findViewById(R.id.drawer_layout_widget), toolbar);
  
              final Calendar calendar = Calendar.getInstance();
              SimpleDateFormat month_date = new SimpleDateFormat("MMMM");
              String month_name = month_date.format(calendar.getTime());
              int year_name = calendar.get(calendar.YEAR);
              int monthNo = calendar.get(Calendar.MONTH);
  
              txtTarget = (TextView) findViewById(R.id.txtTarget);
              txtAchievement = (TextView) findViewById(R.id.txtAchievement);
              txtCollection = (TextView) findViewById(R.id.txtCollection);
              txtMonth = (TextView) findViewById(R.id.txtMonth);
              txtMonthSn = (TextView) findViewById(R.id.txtMonthSn);
              txtYear = (TextView) findViewById(R.id.yearTextV);
              txtM_tar = (TextView) findViewById(R.id.txtMtar);
              txtM_ach = (TextView) findViewById(R.id.txtMAch);
              txtM_prec = (TextView) findViewById(R.id.txtPre);
              arcProgress = (ArcProgress) findViewById(R.id.arc_progress);
              pView = (TextView) findViewById(R.id.pView);
              //arcProgressPrecentage = (ArcProgress) findViewById(R.id.arc_progress_two);
  
              df = new SimpleDateFormat("yyyy-MM");
              systemDate = df.format(new Date());
  
              arcView = (DecoView) findViewById(R.id.dynamicArcView);
  
              bTon = (Button) findViewById(R.id.bTon);
              bValue = (Button) findViewById(R.id.bValue);
              bCollection = (Button) findViewById(R.id.bCollection);
  
              txtMonth.setText(month_name);
              txtMonth.setTypeface(typeface);
              txtM_prec.setTypeface(welcomScreenTypeface);
              txtM_ach.setTypeface(welcomScreenTypeface);
              txtM_tar.setTypeface(welcomScreenTypeface);
              txtYear.setText(String.valueOf(year_name));
  
              db = new SQLiteHandler(getApplicationContext());
  
              // session manager
              session = new SessionManager(getApplicationContext());
  
              if (!session.isLoggedIn()) {
                  logoutUser();
              } else {
                  //pass button click operation
                  getJsonRequest(bTon, bCollection, bValue, systemDate);
              }
  
          }
  public void openBottomSheet() {
          bottomSheetBehavior = BottomSheetBehavior.from(bottomSheet);
          bottomSheetBehavior.setState(BottomSheetBehavior.STATE_EXPANDED);
  
      }
  }
  </code></pre>
  
  <p><strong>LogCat</strong></p>
  
  <pre><code>10:11:48.907 18943-18943/com.ceatkelanisrilanka.dushanmadushanka.ceat E/AndroidRuntime: FATAL EXCEPTION: main
                                                                                                Process: com.ceatkelanisrilanka.dushanmadushanka.ceat, PID: 18943
                                                                                                java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.design.widget.BottomSheetBehavior.setState(int)' on a null object reference
                                                                                                    at com.ceatkelanisrilanka.dushanmadushanka.ceat.WelcomeMenu.openBottomSheet(WelcomeMenu.java:816)
                                                                                                    at com.ceatkelanisrilanka.dushanmadushanka.ceat.fragments.MonthNavigationDrawerFragment$1.onClick(MonthNavigationDrawerFragment.java:87)
                                                                                                    at com.ceatkelanisrilanka.dushanmadushanka.ceat.fragments.MonthNavigationDrawerFragment$RecycleTouchListner.onInterceptTouchEvent(MonthNavigationDrawerFragment.java:239)
                                                                                                    at android.support.v7.widget.RecyclerView.dispatchOnItemTouchIntercept(RecyclerView.java:2206)
                                                                                                    at android.support.v7.widget.RecyclerView.onInterceptTouchEvent(RecyclerView.java:2252)
                                                                                                    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1960)
                                                                                                    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2405)
                                                                                                    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
                                                                                                    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2405)
                                                                                                    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
                                                                                                    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2405)
                                                                                                    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
                                                                                                    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2405)
                                                                                                    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
                                                                                                    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2405)
                                                                                                    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
                                                                                                    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2405)
                                                                                                    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
                                                                                                    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2405)
                                                                                                    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
                                                                                                    at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2369)
                                                                                                    at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1719)
                                                                                                    at android.app.Activity.dispatchTouchEvent(Activity.java:2742)
                                                                                                    at android.support.v7.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:60)
                                                                                                    at android.support.v7.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:60)
                                                                                                    at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2330)
                                                                                                    at android.view.View.dispatchPointerEvent(View.java:8666)
                                                                                                    at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:4123)
                                                                                                    at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:3989)
                                                                                                    at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3544)
                                                                                                    at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3597)
                                                                                                    at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3563)
                                                                                                    at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3680)
                                                                                                    at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3571)
                                                                                                    at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3737)
                                                                                                    at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3544)
                                                                                                    at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3597)
                                                                                                    at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3563)
                                                                                                    at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3571)
                                                                                                    at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3544)
                                                                                                    at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:5807)
                                                                                                    at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:5781)
                                                                                                    at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:5752)
                                                                                                    at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:5897)
                                                                                                    at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:185)
                                                                                                    at android.os.MessageQueue.nativePollOnce(Native Method)
                                                                                                  at android.os.MessageQueue.next(MessageQueue.jav
  04-20 10:16:48.999 18943-18943/com.ceatkelanisrilanka.dushanmadushanka.ceat I/Process: Sending signal. PID: 18943 SIG: 9
  </code></pre>