如何修复“ android.view.InflateException：二进制XML文件第23行：二进制XML文件第23行：夸大类片段的错误”

Question

我是android的新手，我面临着一个令人沮丧的挑战，我不确定如何应对。我正在尝试创建一个使用两个片段的应用程序，一个片段列表将列出城市，另一个片段列表将显示有关所选城市的信息。我主要遇到了致命的异常。

我向我的教授询问了发生了什么事，他看了我的项目约20分钟，也弄不清这是怎么回事。我曾尝试注释掉我认为可能对它有所帮助的部分代码，但我认为问题与我的xml有关，但我对它们还不是很熟悉。

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    @Override
    public void onListFragmentInteraction(DummyContent.DummyItem item){
        Log.v("idk", "item: \n" + item.details);

        FragmentManager fragmentManager = getSupportFragmentManager();
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();

        CityFragment cityFragment = (CityFragment) fragmentManager.findFragmentById(R.id.cityListFragment);
        TextFragment textFragment = (TextFragment) fragmentManager.findFragmentById(R.id.textFragment);

        fragmentTransaction.add(R.id.cityListFragment, cityFragment);
        fragmentTransaction.commit();
        fragmentTransaction.add(R.id.textFragment, textFragment);
        fragmentTransaction.commit();
    }



    @Override
    public void onFragmentInteraction(Uri uri){

    }
}

这是我的主要活动

<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"
    tools:context=".MainActivity">


    <View
        android:id="@+id/view"
        style="@style/Divider"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

    </View>

    <fragment
        android:id="@+id/cityListFragment"
        android:name="com.example.tourguide.CityFragment"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginStart="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        app:layout_constraintBottom_toTopOf="@+id/view"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <fragment
        android:id="@+id/textFragment"
        android:name="com.example.tourguide.TextFragment"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginStart="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/view" />



</android.support.constraint.ConstraintLayout>

这是我的主要xml文件

    Process: com.example.tourguide, PID: 15175
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.tourguide/com.example.tourguide.MainActivity}: android.view.InflateException: Binary XML file line #23: Binary XML file line #23: Error inflating class fragment
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2913)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:6669)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
     Caused by: android.view.InflateException: Binary XML file line #23: Binary XML file line #23: Error inflating class fragment
     Caused by: android.view.InflateException: Binary XML file line #23: Error inflating class fragment
     Caused by: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
        at android.support.v4.app.ListFragment.ensureList(ListFragment.java:349)
        at android.support.v4.app.ListFragment.onViewCreated(ListFragment.java:150)
        at android.support.v4.app.FragmentManagerImpl.ensureInflatedFragmentView(FragmentManager.java:1695)
        at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1431)
        at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1684)
        at android.support.v4.app.FragmentManagerImpl.addFragment(FragmentManager.java:1930)
        at android.support.v4.app.FragmentManagerImpl.onCreateView(FragmentManager.java:3745)
        at android.support.v4.app.FragmentController.onCreateView(FragmentController.java:120)
        at android.support.v4.app.FragmentActivity.dispatchFragmentsOnCreateView(FragmentActivity.java:405)
        at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:387)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:780)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
        at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
        at android.support.v7.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:469)
        at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
        at com.example.tourguide.MainActivity.onCreate(MainActivity.java:21)
        at android.app.Activity.performCreate(Activity.java:7136)
        at android.app.Activity.performCreate(Activity.java:7127)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2893)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:6669)
2019-05-22 19:25:04.806 15175-15175/com.example.tourguide E/AndroidRuntime:     at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
2019-05-22 19:25:04.819 15175-15175/com.example.tourguide I/Process: Sending signal. PID: 15175 SIG: 9

这是我的Logcat。

我为大量代码表示歉意，或者如果我事先犯了一个非常基本的错误，但是我花了很多时间试图自己解决这个问题，结果更加困惑。 感谢您的帮助！

Answer 1

第23行的内容为：goto com.example.tourguide.CityFragment并将resId android.R.id.list添加到该片段中的任何ListView（无论是从XML还是由Java构造的）。

Answer 2

首先，您应该将片段的宽度和高度设置为

android:layout_width="match_parent"
android:layout_height="xxdp"