Android - IllegalStateException：内容具有 id 属性'android.R.id.list_container'不是 ViewGroup 类的视图

Question

最近将一个旧项目迁移到AndroidX，我正在努力实现设置片段。基本上，我尝试添加一个设置片段作为示例，其中包含一些基本的偏好。我甚至使用了studiosettings活动示例代码，但我所有的尝试都返回了相同的异常。

"IllegalStateException：内容具有id属性为"android.R.id.list_container"的视图，该视图不是ViewGroup类"；

我尝试创建一个带有示例设置活动的新项目，它很有效。我正在使用这个prefs版本(尽管我尝试过其他版本(实现"；androidx.preference：preference：1.1.1"；

我会附上它的代码，尽管它是的样本

活动+Frag

public class SettingsActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.settings_activity);
if (savedInstanceState == null) {
getSupportFragmentManager()
.beginTransaction()
.replace(R.id.settings, new SettingsFragment())
.commit();
}
ActionBar actionBar = getSupportActionBar();
if (actionBar != null) {
actionBar.setDisplayHomeAsUpEnabled(true);
}
}
public static class SettingsFragment extends PreferenceFragmentCompat {
@Override
public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
setPreferencesFromResource(R.xml.root_preferences, rootKey);
}
}
}

活动布局

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout
android:id="@+id/settings"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>

StackTrace:

java.lang.IllegalStateException: Content has view with id attribute 'android.R.id.list_container' that is not a ViewGroup class
at androidx.preference.PreferenceFragmentCompat.onCreateView(PreferenceFragmentCompat.java:202)
at androidx.fragment.app.Fragment.performCreateView(Fragment.java:2963)
at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:518)
at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:282)
at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:2189)
at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:2100)
at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:2002)
at androidx.fragment.app.FragmentManager.dispatchStateChange(FragmentManager.java:3138)
at androidx.fragment.app.FragmentManager.dispatchActivityCreated(FragmentManager.java:3072)
at androidx.fragment.app.FragmentController.dispatchActivityCreated(FragmentController.java:251)
at androidx.fragment.app.FragmentActivity.onStart(FragmentActivity.java:502)
at androidx.appcompat.app.AppCompatActivity.onStart(AppCompatActivity.java:246)
at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1510)
at android.app.Activity.performStart(Activity.java:8315)
at android.app.ActivityThread.handleStartActivity(ActivityThread.java:3701)
at android.app.servertransaction.TransactionExecutor.performLifecycleSequence(TransactionExecutor.java:221)
at android.app.servertransaction.TransactionExecutor.cycleToPath(TransactionExecutor.java:201)
at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:173)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:97)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2308)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loopOnce(Looper.java:201)
at android.os.Looper.loop(Looper.java:288)
at android.app.ActivityThread.main(ActivityThread.java:7898)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:936)

我在这里错过了什么？我无法摆脱这个错误

Answer 1

我一直在谷歌ANdroid问题跟踪器中挖掘，直到我发现这个错误，它与我的情况相匹配。

解决方案很简单：

1. 在代码库中搜索文件preference_list_fragment.xml

2. 重命名它，因为它正在覆盖android.preferences库中的另一个xml文件！