使用自定义对象的arrayList填充listview

我已经在Android上尝试了几个星期，但是在使用自定义对象填充listview时遇到了麻烦 . 我已经尝试了几个有关堆栈溢出和youtube的教程，但是当应用程序运行时，它会在list.setAdapter（适配器）崩溃 . 但我不清楚原因是什么 .

这是我最近的尝试：

public class NPCEditor extends Fragment{

    View myView;
    ArrayList<NPC> NPCs = new ArrayList<>();

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
        myView = inflater.inflate(R.layout.npc_edit, container, false);

        populateNPCList();
        populateListview();

        return myView;
    }

    private void populateNPCList(){
        NPCs.add(new NPC(40, 10, 10, 10, 10, 10, 10, "", "", "", "", "", "", ""));
        NPCs.add(new NPC(50, 10, 10, 10, 10, 10, 10, "", "", "", "", "", "", ""));
        NPCs.add(new NPC(60, 10, 10, 10, 10, 10, 10, "", "", "", "", "", "", ""));
        NPCs.add(new NPC(70, 10, 10, 10, 10, 10, 10, "", "", "", "", "", "", ""));
        NPCs.add(new NPC(80, 10, 10, 10, 10, 10, 10, "", "", "", "", "", "", ""));
    }

    private void populateListview(){
        ArrayAdapter<NPC> adapter = new NPCAdapter2();
        ListView list = myView.findViewById(R.id.NPCList);
        list.setAdapter(adapter);
    }

    private class NPCAdapter2 extends ArrayAdapter<NPC>{
        public NPCAdapter2(){
            super(getActivity(), R.layout.npc_layout, NPCs);
        }

        public View getView(int position, View convertView, ViewGroup parent){
            View itemView = convertView;
            if(itemView == null){
                itemView = getLayoutInflater().inflate(R.layout.npc_layout, parent, false);
            }
            NPC currentNPC = NPCs.get(position);
            TextView txtAge = itemView.findViewById(R.id.textAge);
            txtAge.setText(currentNPC.getAge());
            return  itemView;
       }
    }
}

和xml文件npc_layout

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

    <TextView
        android:id="@+id/textAge"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Age" />
</LinearLayout>

和NPCEditor布局：

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
    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">

    <ListView
        android:id="@+id/NPCList"
        android:layout_width="368dp"
        android:layout_height="327dp"
        android:layout_marginBottom="16dp"
        android:layout_marginStart="8dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent" />
</android.support.constraint.ConstraintLayout>

logcat的：

崩溃的开始

04-22 10：43：56.986 12587-12587 / blackanvil.com.dmi E / AndroidRuntime：> FATAL EXCEPTION：main进程：blackanvil.com.dmi，PID：12587 java.lang.NoSuchMethodError：没有虚方法getLayoutInflater（） Landroid /视图/ LayoutInflater;在课程Lblackanvil / com / dmi / NPCEditor;或者它的超级类（'blackanvil.com.dmi.NPCEditor'的声明出现在/data/app/blackanvil.com.dmi-1/split_lib_slice_2_apk.apk）在blackanvil.com.dmi.NPCEditor $ NPCAdapter2.getView（NPCEditor . java：53）在android.widget.AbsList.obtainView（AbsListView.java:2497）的android.widget.List.makeAndAddView（ListView.java:1930）在android.widget.ListView.fillDown（ListView.java:722）at在Android.view.View.View的android.widget.AbsList.onLayout（AbsListView.java:2254）上的android.widget.ListView.fillFromTop（ListView.java:783）android.widget.ListView.layoutChildren（ListView.java:1721） .layout（View.java:16966）位于android.view.Viewout上的android.view.ViewGroup.layout（ViewGroup.java:5604）android.sview.constraint.ConstraintLayout.onLayout（ConstraintLayout.java:1855） View.java:16966）在Android.widget.FrameLayout.onLayout（FrameLayout.java:333）的android.widget.FrameLayout.layoutChildren（FrameLayout.java：398）的android.view.ViewGroup.layout（ViewGroup.java:5604） ）在android.view.Vie在android.view.View.Viewout的android.sview.constraint.ConstraintLayout.onLayout（ConstraintLayout.java:1855）的android.view.ViewGroup.layout（ViewGroup.java:5604）的w.layout（View.java:16966） （View.java:16966）位于android.support.design.wout.Seout上的android.view.design.widget.HeaderScrollingViewBehavior.layoutChild（HeaderScrollingViewBehavior.java:132）上的android.view.ViewGroup.layout（ViewGroup.java:5604） . 在Android.support.design.design.widget.CoordinatorLayout.onLayout（CoordinatorLayout.java:869）的android.support.design.widget.AppBarLayout $ ScrollingViewBehavior.onLayoutChild（AppBarLayout.java:1361）中的ViewOffsetBehavior.onLayoutChild（ViewOffsetBehavior.java:42）在android.view.View.layout（View.java:16966）的android.view.ViewGroup.layout（ViewGroup.java:5604）在android.support.v4.widget.DrawerLayout.onLayout（DrawerLayout.java:1172）at at android.view.Viewout.Loutout.layoutChildren上的android.view.View.layout（View.java:16966）android.view.Viewout.layout（ViewGroup.java:5604）（FrameLayout.java：398） ）在Android.widget.fallLayout.onLayout（FrameLayout.java:333）的android.view.View.layout（View.java:16966）android.view.Viewout上的android.view.ViewGroup.layout（ViewGroup.java:5604） .LinearLayout.setChildFrame（LinearLayout.java:2022）在Android.widget.Line中的android.widget.LinearLayout.onLayout（LinearLayout.java：1774）android.view.Loutout . View.java:16966）在Android.widget.FrameLayout.onLayout（FrameLayout.java:333）的android.widget.FrameLayout.layoutChildren（FrameLayout.java：398）的android.view.ViewGroup.layout（ViewGroup.java:5604） ）在Android.widget.Linout.setChildFrame（LinearLayout.java:2022）android.view上的android.view.View.layout（View.java:16966）的android.view.View.layout（ViewGroup.java:5604） .LinearLayout.layoutVertical（LinearLayout.java:1865）在android.view.Loutout.onLayout（LinearLayout.java:1774）的android.view.View.layout（View.java:16966）android.view.ViewGroup.layout（ ViewGroup.java:5604）atr oid.widget.FrameLayout.layoutChildren（FrameLayout.java:398）在android.widget.FrameLayout.onLayout（FrameLayout.java:333）com.android.internal.policy.PhoneWindow $ DecorView.onLayout（PhoneWindow.java:2817）在Android.view上的android.view.View.Loutout（ViewRootImpl.java:2635）的android.view.View.layout（View.java:16966）上的android.view.View.layout（ViewGroup.java:5604） . 在Android.view.Choreographer $ CallbackRecord的android.view.ViewRootImpl $ TraversalRunnable.run（ViewRootImpl.java:6974）的android.view.ViewRootImpl.doTraversal（ViewRootImpl.java:1367）上的ViewRootImpl.performTraversals（ViewRootImpl.java:2329） .run（Choreographer.java:922）在android.view.Choreographer.doCallbacks（Choreographer.java:724）atandroid.view.Choreographer.doFrame（Choreographer.java:658）at android.view.Ch 04-22 10：43：57.117 12587-12587 / blackanvil.com.dmi I / Process：发送信号 . PID：12587 SIG：9