App сбой при запуске после добавления навигации ящик

Question

Так что я пытаюсь обновить мой app, добавив app drawer и в том числе несколько больше страниц на app, все выглядит нормально, но app аварии на старте, я получил идею от Androidhive.info. Ошибка связана с измерениями appDrawer. Прилагаются сообщение об ошибке, MainActivity.java и файлы activity_main.xml. сообщение об ошибке,

    E/AndroidRuntime: FATAL EXCEPTION: main 
       java.lang.IllegalArgumentException: DrawerLayout must be measured with MeasureSpec.EXACTLY. 
        at android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:1046) 
        at android.view.View.measure(View.java:15609) 
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4916) 
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 
        at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:135) 
        at android.view.View.measure(View.java:15609) 
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4916) 
        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1411) 
        at android.widget.LinearLayout.measureVertical(LinearLayout.java:698) 
        at android.widget.LinearLayout.onMeasure(LinearLayout.java:588) 
        at android.view.View.measure(View.java:15609) 
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4916) 
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 
        at android.view.View.measure(View.java:15609) 
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4916) 
        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1411) 
        at android.widget.LinearLayout.measureVertical(LinearLayout.java:698) 
        at android.widget.LinearLayout.onMeasure(LinearLayout.java:588) 
        at android.view.View.measure(View.java:15609) 
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4916) 
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 
        at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2191) 
        at android.view.View.measure(View.java:15609) 
        at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2165) 
        at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1249) 
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1443) 
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1139) 
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4879) 
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:776) 
        at android.view.Choreographer.doCallbacks(Choreographer.java:579) 
        at android.view.Choreographer.doFrame(Choreographer.java:548) 
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:762) 
        at android.os.Handler.handleCallback(Handler.java:725) 
        at android.os.Handler.dispatchMessage(Handler.java:92) 
        at android.os.Looper.loop(Looper.java:153) 
        at android.app.ActivityThread.main(ActivityThread.java:5297) 
        at java.lang.reflect.Method.invokeNative(Native Method) 
        at java.lang.reflect.Method.invoke(Method.java:511) 
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600) 
        at dalvik.system.NativeStart.main(Native Method) 

The MainActivity.java

package com.example.abdulkarim.justjava.activity; 

import android.content.Intent; 
import android.os.Bundle; 
import android.os.Handler; 
import android.support.design.widget.FloatingActionButton; 
import android.support.design.widget.NavigationView; 
import android.support.design.widget.Snackbar; 
import android.support.v4.app.Fragment; 
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.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.ImageView; 
import android.widget.TextView; 

import com.bumptech.glide.Glide; 
import com.bumptech.glide.load.engine.DiskCacheStrategy; 
import com.example.abdulkarim.justjava.R; 
import com.example.abdulkarim.justjava.fragment.HomeFragment; 
import com.example.abdulkarim.justjava.fragment.OrderFragment; 
import com.example.abdulkarim.justjava.fragment.SettingsFragment; 
import com.example.abdulkarim.justjava.other.CircleTransform; 


public class MainActivity extends AppCompatActivity { 
    private NavigationView navigationView; 
    private DrawerLayout drawer; 
    private View navHeader; 
    private ImageView imgNavHeaderBg, imgProfile; 
    private TextView txtName, txtWebsite; 
    private Toolbar toolbar; 
    private FloatingActionButton fab; 

    // urls to find load navigation header background image 
    //and profile image 
    private static final String urlNavHeaderBg = "http://api.androidhive.info/images/nav-menu-header-bg.jpg"; 
    private static final String urlProfileImg = "https://lh3.googleusercontent.com/eCtE_G34M9ygdkmOpYvCag1vBARCmZwnVS6rS5t4JLzJ6QgQSBquM0nuTsCpLhYbKljoyS-txg"; 

    //index to identify current nav menu item 
    public static int navItemIndex = 0; 

    //tags used to attach the fragments 
    private static final String TAG_HOME = "home"; 
    private static final String TAG_ORDER = "order"; 
    private static final String TAG_SETTINGS = "preferences"; 
    public static String CURRENT_TAG = TAG_HOME; 

    //toolbar titles respected to selected nav menu item 
    private String[] activityTitles; 

    // flag to load home fragment when user presses back key 
    private boolean shouldLoadHomeFragOnBackPress = true; 
    private Handler mHandler; 



    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     toolbar = (Toolbar) findViewById(R.id.toolbar); 
     setSupportActionBar(toolbar); 

     mHandler = new Handler(); 

     drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
     navigationView = (NavigationView) findViewById(R.id.nav_view); 
     fab = (FloatingActionButton) findViewById(R.id.fab); 

     //Navigation view header 
     navHeader = navigationView.getHeaderView(0); 
     txtName = (TextView) navHeader.findViewById(R.id.input_name); 
     txtWebsite = (TextView) navHeader.findViewById(R.id.website); 
     imgNavHeaderBg = (ImageView) navHeader.findViewById(R.id.img_header_bg); 
     imgProfile = (ImageView) navHeader.findViewById(R.id.img_profile); 

     //load toolbar titles from string resources 
     activityTitles = getResources().getStringArray(R.array.nave_item_activity_titles); 

     fab.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       Snackbar.make(view, "Text", Snackbar.LENGTH_LONG).setAction("Action", null).show(); 
      } 
     }); 

     // load nav menu header data 
     loadNavHeader(); 

     // initializing navigation menu 
     setUpNavigationView(); 

     if (savedInstanceState == null) { 
      navItemIndex = 0; 
      CURRENT_TAG = TAG_HOME; 
      loadHomeFragment(); 
     } 

    } 

    /** 
    * Load navigation menu header information 
    * like background image, profile image name, 
    * website, notifications action view (dot) 
    */ 
    private void loadNavHeader() { 
     // name, website 
     txtName.setText("Abdulrahman Abdulkarim"); 
     txtWebsite.setText("www.shukura.com"); 

     //loading header background image 
     Glide.with(this).load(urlNavHeaderBg) 
       .crossFade() 
       .diskCacheStrategy(DiskCacheStrategy.ALL) 
       .into(imgNavHeaderBg); 
     // loading profile image 
     Glide.with(this).load(urlProfileImg) 
       .crossFade() 
       .thumbnail(0.5f) 
       .bitmapTransform(new CircleTransform(this)) 
       .diskCacheStrategy(DiskCacheStrategy.ALL) 
       .into(imgProfile); 

     // showing dot next to notification label 
     navigationView.getMenu().getItem(3).setActionView(R.layout.menu_dot); 
    } 

    /** 
    * Returns respected fragment that user selected from 
    * navigation menu 
    */ 
    private void loadHomeFragment() { 
     //selecting appropriate nav menu item 
     selectNavMenu(); 

     //set toolbar title 
     setToolbarTitle(); 

     //if user select the current navigation menu again, don't do anything 
     //just close the navigation drawer 
     if (getSupportFragmentManager().findFragmentByTag(CURRENT_TAG) != null) { 
      drawer.closeDrawers(); 

      //show or hide the fab 
      toggleFab(); 
      return; 
     } 

     //Sometimes, when fragment has huge data, screen seems hanging 
     //when switching between navigation menus 
     //So using runnable, the fragment is loaded with cross fade effect 
     //This effect can be seen in GMail app 
     Runnable mPendingRunnable = new Runnable() { 
      @Override 
      public void run() { 
       //update the main content by replacing fragments 
       Fragment fragment = getHomeFragment(); 
       FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction(); 
       fragmentTransaction.setCustomAnimations(android.R.anim.fade_in, 
         android.R.anim.fade_out); 
       fragmentTransaction.replace(R.id.frame, fragment, CURRENT_TAG); 
       fragmentTransaction.commitAllowingStateLoss(); 
      } 
     }; 

     //if mPendingRunnable is not null, then add to the message queue 
     if (mPendingRunnable != null) { 
      mHandler.post(mPendingRunnable); 
     } 

     //show or hide the fab 
     toggleFab(); 

     //closing drawer on item click 
     drawer.closeDrawers(); 

     //refresh toolbar menu 
     invalidateOptionsMenu(); 
    } 

    private Fragment getHomeFragment() { 
     switch (navItemIndex) { 
      case 0: 
       //home 
       HomeFragment homeFragment = new HomeFragment(); 
       return homeFragment; 
      case 1: 
       //order 
       OrderFragment orderFragment = new OrderFragment(); 
       return orderFragment; 
      case 2: 
       SettingsFragment settingsFragment = new SettingsFragment(); 
       return settingsFragment; 
      default: 
       return new HomeFragment(); 
     } 
    } 

    private void setToolbarTitle() { 
     getSupportActionBar().setTitle(activityTitles[navItemIndex]); 
    } 

    private void selectNavMenu() { 
     navigationView.getMenu().getItem(navItemIndex).setChecked(true); 
    } 

    private void setUpNavigationView() { 
     //Setting Navigation View Item Selected Listener to handle the item click of the navigation menu 
     navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() { 

      //This method will trigger on item click of Navigation menu 
      @Override 
      public boolean onNavigationItemSelected(MenuItem menuItem) { 

       //Check to see which item was being clicked and perform appropriate action 
       switch (menuItem.getItemId()) { 
        //Replacing the main conten with Content Fragment which is our Inbox view 
        case R.id.nav_home: 
         navItemIndex = 0; 
         CURRENT_TAG = TAG_HOME; 
         break; 
        case R.id.nav_order: 
         navItemIndex = 1; 
         CURRENT_TAG = TAG_ORDER; 
         break; 
        case R.id.nav_settings: 
         navItemIndex = 2; 
         CURRENT_TAG = TAG_SETTINGS; 
         break; 
        case R.id.nav_about_us: 
         startActivity(new Intent(MainActivity.this, AboutUs.class)); 
         drawer.closeDrawers(); 
         return true; 
        case R.id.nav_contact: 
         startActivity(new Intent(MainActivity.this, ContactUs.class)); 
         drawer.closeDrawers(); 
         return true; 
        default: 
         navItemIndex = 0; 
       } 

       //Checking if the tiem is in checked state or not, if not check the item 
       if (menuItem.isChecked()) { 
        menuItem.setChecked(false); 
       } else { 
        menuItem.setChecked(true); 
       } 
       menuItem.setChecked(true); 

       loadHomeFragment(); 

       return true; 
      } 
     }); 

     ActionBarDrawerToggle actionBarDrawerToggle = new ActionBarDrawerToggle(this, drawer, toolbar, R.string.openDrawer, R.string.closeDraer) { 
      @Override 
      public void onDrawerClosed(View drawerView) { 
       //Code here will be triggered once the drawer closes as we don't want anything to happen so we leave this blank 
       super.onDrawerClosed(drawerView); 
      } 

      @Override 
      public void onDrawerOpened(View drawerView) { 
       //Code here will be triggered once the drawer closes as we don't want anything to happen so we leave this blank 
       super.onDrawerOpened(drawerView); 
      } 
     }; 

     //Setting the actionbarToggle to drawer layout 
     drawer.setDrawerListener(actionBarDrawerToggle); 

     //calling sync state is necessary or else your hamburger icon won't show up 
     actionBarDrawerToggle.syncState(); 
    } 

    @Override 
    public void onBackPressed() { 
     if (drawer.isDrawerOpen(GravityCompat.START)) { 
      drawer.closeDrawers(); 
      return; 
     } 

     //This code loads home fragment when back key is pressed 
     //when useer is in other fragment than home 

     if (shouldLoadHomeFragOnBackPress) { 
      //checking if useer is on other navigation menu 
      //rather than home 
      if (navItemIndex != 0) { 
       navItemIndex = 0; 
       CURRENT_TAG = TAG_HOME; 
       loadHomeFragment(); 
       ; 
       return; 
      } 
     } 

     super.onBackPressed(); 
    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     //Inflate the menu; this adds items to the action bar if it is present 

     //show menu only when home fragment is selected 
     if (navItemIndex == 0) { 
      getMenuInflater().inflate(R.menu.main, menu); 
     } 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. the actionbar will 
     //automatically handle clicks on the Home/Up button, so long 
     //as you specify a parent activity in AndroidManifest.xml. 
     return super.onOptionsItemSelected(item); 
    } 

    //show or hide the fab 
    private void toggleFab() { 
     if (navItemIndex == 0) 
      fab.show(); 
     else 
      fab.hide(); 
     ; 
    } 

} 

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="fill_parent" 
    android:layout_height="wrap_content" 
    android:fitsSystemWindows="true" 
    tools:openDrawer="start"> 

    <include 
     layout="@layout/app_bar_man" 
     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> 

Answer 1

Вы получаете исключения нулевого указателя в методе loadNavHeader(). Можете ли вы дважды проверить, что вы правильно создаете все переменные в этом методе в OnCreate().

Стоит ли размещать ваш макет @layout/nav_header_main.

EDIT:android:layout_height="match_parent"