Настройка значка программно вызывает исключение RuntimeException. Что вызывает это?

Question

Итак, я пытаюсь добавить некоторые элементы меню в свой навигационный ящик по коду, поэтому я делаю некоторые тесты. Все работает нормально, за исключением ошибки RuntimeException, которую я получаю, когда пытаюсь установить значок для элемента меню. Ошибка сбивает меня с толку, так как она говорит, что у него проблемы с литьем NavigationMenuSeperatorItem.

Фрагмент кода:

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

    Menu menu = navigationView.getMenu(); 
    MenuItem it1 = menu.add(R.id.group1, 1, 2, "TEST DYNAMIC"); 
//  it1.setIcon(R.drawable.ic_menu_camera); 

Так с it1.setIcon немного закомментирована, все работает отлично. Пункт меню входит в нужное место, никаких проблем. Как только я добавлю код setIcon к коду, приложение запускается при запуске.

Я делаю что-то неправильно здесь или что-то странное происходит?

Полная mainActivity:

package com.example.tim.timapp; 

import android.app.AlertDialog; 
import android.app.Dialog; 
import android.app.Fragment; 
import android.app.FragmentManager; 
import android.content.Context; 
import android.content.DialogInterface; 
import android.os.AsyncTask; 
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.util.Base64; 
import android.util.Log; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.Button; 
import android.widget.TextView; 
import android.widget.Toast; 

import com.example.fragments.MainFragments.MainFragment; 
import com.example.fragments.MainFragments.SubFragments.VariableFragment; 
import com.example.fragments.MainFragments.TimeLightFragment; 
import com.example.fragments.MainFragments.ToggleLightFragment; 
import com.example.fragments.MainFragments.WakeUpLightFragment; 
import com.example.fragments.Settings.GeneralSettingsFragment; 
import com.example.fragments.Settings.StuffManagerFragment; 

import org.json.JSONArray; 
import org.json.JSONException; 
import org.json.JSONObject; 

import java.io.BufferedReader; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.InputStreamReader; 
import java.net.HttpURLConnection; 
import java.net.URL; 
import java.util.ArrayList; 

public class MainActivity extends AppCompatActivity 
     implements NavigationView.OnNavigationItemSelectedListener { 

    private static boolean isMainShown = false; 
    private static boolean isSettingsShown = false; 
    private static boolean doSavePopup = false; 
    private static String backTitle = ""; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

     setContentView(R.layout.activity_main); 
     isMainShown = true; 
     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); 

     Menu menu = navigationView.getMenu(); 
     MenuItem it1 = menu.add(R.id.group1, 1, 2, "TEST DYNAMIC"); 
//  it1.setIcon(R.drawable.ic_menu_camera); 

     FragmentManager fm = getFragmentManager(); 
     fm.beginTransaction().replace(R.id.content_frame, new MainFragment()).commit(); 
    } 

    @Override 
    public void onBackPressed() { 
     Log.d("TEST", Boolean.toString(doSavePopup)); 
     FragmentManager fm = getFragmentManager(); 
     DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
     if (drawer.isDrawerOpen(GravityCompat.START)) { 
      drawer.closeDrawer(GravityCompat.START); 
     } else if (isSettingsShown) { 
      getFragmentManager().popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE); 
      setTitle(backTitle); 
      isSettingsShown = false; 
     } else if (!isMainShown) { 
      fm.beginTransaction().replace(R.id.content_frame, new MainFragment()).commit(); 
      setTitle("Home"); 
      isMainShown = true; 
     } else if (doSavePopup) { 
      new AlertDialog.Builder(MainActivity.this) 
        .setMessage(R.string.generalSettingsLeaving) 
        .setTitle("TEST") 
        .setCancelable(true) 
        .setPositiveButton(R.string.generalSettingsLeavingSave, new DialogInterface.OnClickListener() { 
         @Override 
         public void onClick(DialogInterface dialog, int which) { 
          //TODO: Clicked Save, save. 
         } 
        }) 
        .setNegativeButton(R.string.generalSettingsLeavingDiscard, new DialogInterface.OnClickListener() { 
         @Override 
         public void onClick(DialogInterface dialog, int which) { 
          //TODO: Clicked Discard, discard. 
         } 
        }).create().show(); 
//   fm.beginTransaction().replace(R.id.content_frame, new MainFragment()).commit(); 
//   setTitle("Home"); 
      isMainShown = true; 
      doSavePopup = false; 
      //TODO: Tidy up here, from changing to a general doSavePopup thingy. 
     } else { 
      super.onBackPressed(); 
     } 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     FragmentManager fm = getFragmentManager(); 
     isMainShown = false; 
     isSettingsShown = true; 

     //TODO Change from general-settings page to specific settings page. 

     switch (item.getItemId()) { 
      case 0: 
       fm.beginTransaction().replace(R.id.content_frame, new GeneralSettingsFragment()).addToBackStack("backStack").commit(); 
       backTitle = getString(R.string.settings); 
       setTitle(backTitle + " Settings"); 
       return true; 
      case 1: 
       fm.beginTransaction().replace(R.id.content_frame, new GeneralSettingsFragment()).addToBackStack("backStack").commit(); 
       backTitle = getString(R.string.navdrawer_timelight); 
       setTitle(backTitle + " Settings"); 
       return true; 
      case 2: 
       fm.beginTransaction().replace(R.id.content_frame, new GeneralSettingsFragment()).addToBackStack("backStack").commit(); 
       backTitle = getString(R.string.navdrawer_togglelight); 
       setTitle(backTitle + " Settings"); 
       return true; 
      case 3: 
       fm.beginTransaction().replace(R.id.content_frame, new GeneralSettingsFragment()).addToBackStack("backStack").commit(); 
       backTitle = getString(R.string.navdrawer_wakeuplight); 
       setTitle(backTitle + " Settings"); 
       return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 

    @SuppressWarnings("StatementWithEmptyBody") 
    @Override 
    public boolean onNavigationItemSelected(MenuItem item) { 

     FragmentManager fm = getFragmentManager(); 
     isMainShown = false; 

     int id = item.getItemId(); 

     if (id == R.id.nav_wakeuplight) { 
      fm.beginTransaction().replace(R.id.content_frame, new WakeUpLightFragment()).commit(); 
      setTitle(getString(R.string.navdrawer_wakeuplight)); 
      new JSONTask().execute("http://192.168.0.120:8080/json.htm?type=command&param=getuservariables", "WuL"); 
      doSavePopup = true; 
     } else if (id == R.id.nav_togglelights) { 
      fm.beginTransaction().replace(R.id.content_frame, new ToggleLightFragment()).commit(); 
      setTitle(getString(R.string.navdrawer_togglelight)); 
     } else if (id == R.id.nav_timelight) { 
      fm.beginTransaction().replace(R.id.content_frame, new TimeLightFragment()).commit(); 
      setTitle(getString(R.string.navdrawer_timelight)); 
     } else if (id == R.id.nav_generalsettings) { 
      fm.beginTransaction().replace(R.id.content_frame, new GeneralSettingsFragment()).commit(); 
      setTitle(getString(R.string.navdrawer_generalsettings)); 
//   isGeneralSettingsShown = true; 
     } else if (id == R.id.nav_stuffmanager) { 
      fm.beginTransaction().replace(R.id.content_frame, new StuffManagerFragment()).commit(); 
      setTitle(getString(R.string.navdrawer_stuffmanager)); 
     } 

     DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
     drawer.closeDrawer(GravityCompat.START); 
     return true; 
    } 

    public class JSONTask extends AsyncTask<String, String, String> { 

     final String basicAuth = "Basic " + Base64.encodeToString("pi:pass".getBytes(), Base64.NO_WRAP); 

     ArrayList<String> GlobalkArray = new ArrayList<>(); 
     ArrayList<Integer> GlobalvArray = new ArrayList<>(); 

     @Override 
     protected String doInBackground(String... params) { 
      HttpURLConnection connection = null; 
      BufferedReader reader = null; 
      try { 
       URL url = new URL(params[0]); 
       connection = (HttpURLConnection) url.openConnection(); 
       connection.setRequestProperty("Authorization", basicAuth); 
       connection.connect(); 

       InputStream stream = connection.getInputStream(); 

       reader = new BufferedReader(new InputStreamReader(stream)); 

       StringBuilder buffer = new StringBuilder(); 
       String line; 
       while ((line = reader.readLine()) != null) { 
        buffer.append(line); 
       } 

       try { 
        JSONObject jsonRootObject = new JSONObject(buffer.toString()); 

        JSONArray jsonArray = jsonRootObject.optJSONArray("result"); 
        ArrayList<String> kArray= new ArrayList<>(); 
        ArrayList<Integer> vArray= new ArrayList<>(); 
        for (int i = 0; i < jsonArray.length(); i++) { 
         JSONObject jsonObject = jsonArray.getJSONObject(i); 

         int idx = Integer.parseInt(jsonObject.optString("idx")); 
         String name = jsonObject.optString("Name"); 
         int value = Integer.parseInt(jsonObject.optString("Value")); 

         kArray.add(i, name); 
         vArray.add(i, value); 

        } 
        int j = 0; 
        for (int i=0; i < kArray.size(); i++){ 
         if ((kArray.get(i)).contains(params[1])){ 
          GlobalkArray.add(j, kArray.get(i)); 
          GlobalvArray.add(j, vArray.get(i)); 
          j++; 
         } else { 
          Log.d("Array", "This value (" + kArray.get(i) + ") does not contain the parameter (" + params[1] + ")"); 
//       Do nothing, filters out all variables that do NOT have the given parameter in it. 
         } 
        } 
       } catch (JSONException e) {e.printStackTrace();} 

       return "true"; 

      } catch (IOException e) { 
       e.printStackTrace(); 
      } finally { 
       if (connection != null) { 
        connection.disconnect(); 
       } 
       try { 
        if (reader != null) { 
         reader.close(); 
        } 
       } catch (IOException e) { 
        e.printStackTrace(); 
       } 
      } 
      return null; 
     } 

     @Override 
     protected void onPostExecute (String result){ 
      super.onPostExecute(result); 
      FragmentManager fm = getFragmentManager(); 
      if (result != null) { 
       for (int i=0; i < GlobalkArray.size(); i++) { 
        fm.beginTransaction().add(R.id.FragmentContainer, new VariableFragment(), "VariableFragment").commit(); 
        fm.executePendingTransactions(); 
        ((VariableFragment)getFragmentManager().findFragmentByTag("VariableFragment")).setTextView(GlobalkArray.get(i)); 
        ((VariableFragment)getFragmentManager().findFragmentByTag("VariableFragment")).setEditText(GlobalvArray.get(i).toString()); 
       } 
      } else { 
       Log.e("OnPostExecute", "Result is null"); 
      } 
     } 
    } 
} 

Вход:

02-23 13:41:59.730 13630-13630/com.example.tim.timapp I/art: Not late-enabling -Xcheck:jni (already on) 
02-23 13:41:59.800 13630-13630/com.example.tim.timapp W/System: ClassLoader referenced unknown path: /data/app/com.example.tim.timapp-2/lib/x86_64 
02-23 13:41:59.960 13630-13630/com.example.tim.timapp D/AndroidRuntime: Shutting down VM 
02-23 13:41:59.960 13630-13630/com.example.tim.timapp E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.tim.timapp, PID: 13630 
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.tim.timapp/com.example.tim.timapp.MainActivity}: java.lang.ClassCastException: android.support.design.internal.NavigationMenuPresenter$NavigationMenuSeparatorItem cannot be cast to android.support.design.internal.NavigationMenuPresenter$NavigationMenuTextItem 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) 
at android.app.ActivityThread.-wrap11(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:148) 
at android.app.ActivityThread.main(ActivityThread.java:5417) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
Caused by: java.lang.ClassCastException: android.support.design.internal.NavigationMenuPresenter$NavigationMenuSeparatorItem cannot be cast to android.support.design.internal.NavigationMenuPresenter$NavigationMenuTextItem 
at android.support.design.internal.NavigationMenuPresenter$NavigationMenuAdapter.appendTransparentIconIfMissing(NavigationMenuPresenter.java:507) 
at android.support.design.internal.NavigationMenuPresenter$NavigationMenuAdapter.prepareMenuItems(NavigationMenuPresenter.java:493) 
at android.support.design.internal.NavigationMenuPresenter$NavigationMenuAdapter.update(NavigationMenuPresenter.java:426) 
at android.support.design.internal.NavigationMenuPresenter.updateMenuView(NavigationMenuPresenter.java:113) 
at android.support.v7.view.menu.MenuBuilder.dispatchPresenterUpdate(MenuBuilder.java:284) 
at android.support.v7.view.menu.MenuBuilder.onItemsChanged(MenuBuilder.java:1030) 
at android.support.v7.view.menu.MenuItemImpl.setIcon(MenuItemImpl.java:445) 
at com.example.tim.timapp.MainActivity.onCreate(MainActivity.java:74) 
at android.app.Activity.performCreate(Activity.java:6237) 
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107) 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)  
at android.app.ActivityThread.-wrap11(ActivityThread.java)  
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)  
at android.os.Handler.dispatchMessage(Handler.java:102)  
at android.os.Looper.loop(Looper.java:148)  
at android.app.ActivityThread.main(ActivityThread.java:5417)  
at java.lang.reflect.Method.invoke(Native Method)  
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)  
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)  
02-23 13:47:00.290 13630-13630/? I/Process: Sending signal. PID: 13630 SIG: 9 

Activity_main_drawer.xml

<?xml version="1.0" encoding="utf-8"?> 
<menu xmlns:android="http://schemas.android.com/apk/res/android"> 

    <group android:visible="true" android:orderInCategory="1" android:id="@+id/group1" > 
     <item android:title="TEST SOLID"/> 
    </group> 

    <item android:title="@string/navdrawer_title1" android:orderInCategory="2"> 
     <menu> 
      <item 
       android:id="@+id/nav_wakeuplight" 
       android:icon="@drawable/ic_menu_gallery" 
       android:title="@string/navdrawer_wakeuplight" /> 
      <item 
       android:id="@+id/nav_togglelights" 
       android:icon="@drawable/ic_menu_gallery" 
       android:title="@string/navdrawer_togglelight" /> 
      <item 
       android:id="@+id/nav_timelight" 
       android:icon="@drawable/ic_menu_gallery" 
       android:title="@string/navdrawer_timelight" /> 
     </menu> 
    </item> 

    <item android:title="@string/navdrawer_title2" android:orderInCategory="3"> 
     <menu> 
      <item 
       android:id="@+id/nav_generalsettings" 
       android:icon="@drawable/ic_menu_gallery" 
       android:title="@string/navdrawer_generalsettings" /> 
      <item 
       android:id="@+id/nav_stuffmanager" 
       android:icon="@drawable/ic_menu_gallery" 
       android:title="@string/navdrawer_stuffmanager" /> 
     </menu> 
    </item> 
</menu> 

Answer 1

Попробуйте так:

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

Menu menu = navigationView.getMenu(); 
menu.add(R.id.group1, itemId, 2, "TEST DYNAMIC"); 
menu.findItem(itemId).setIcon(R.drawable.ic_menu_camera); 

Я запутался в menu.add() возвращается в пункт меню ...

Answer 2

я получаю ту же ошибку. Я использовал несколько групп в главном меню навигации. Добавление идентификаторов в группы помогло мне решить.

<group 
    android:id="@+id/group1" 
    android:checkableBehavior="single"> 
    <item 
     android:id="@+id/item1" 
     android:icon="@android:drawable/.." 
     android:title="---" /> 
    <item 
     android:id="@+id/item2" 
     android:icon="@android:drawable/.." 
     android:title="--" /> 
</group> 
<group 
    android:id="@+id/group2" 
    android:checkableBehavior="single"> 
    <item 
     android:id="@+id/item3" 
     android:icon="@android:drawable/.." 
     android:title="---" /> 
    <item 
     android:id="@+id/item4" 
     android:icon="@android:drawable/.." 
     android:title="--" /> 
</group> 

Возможно, попробуйте добавить идентификаторы к элементам, которые находятся на том же уровне иерархии, что и группа.