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RuntimeException Content has view with id attribute 'android.R.id.list_container' that is not a ViewGroup class

Posted by: admin June 15, 2020 Leave a comment

Questions:

I’m getting this exception only from Huawei devices with Android 5.0.1:

Fatal Exception: java.lang.RuntimeException: Unable to start activity ComponentInfo{net.example.app/net.example.app.view.PreferencesActivity}: java.lang.RuntimeException: Content has view with id attribute 'android.R.id.list_container' that is not a ViewGroup class
       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2406)
       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2466)
       at android.app.ActivityThread.access$1200(ActivityThread.java:152)
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1341)
       at android.os.Handler.dispatchMessage(Handler.java:102)
       at android.os.Looper.loop(Looper.java:135)
       at android.app.ActivityThread.main(ActivityThread.java:5538)
       at java.lang.reflect.Method.invoke(Method.java)
       at java.lang.reflect.Method.invoke(Method.java:372)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:960)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
Caused by java.lang.RuntimeException: Content has view with id attribute 'android.R.id.list_container' that is not a ViewGroup class
       at android.support.v14.preference.PreferenceFragment.onCreateView(PreferenceFragment.java:278)
       at android.app.Fragment.performCreateView(Fragment.java:2059)
       at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:899)
       at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1076)
       at android.app.BackStackRecord.run(BackStackRecord.java:833)
       at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1461)
       at android.app.Activity.performStart(Activity.java:6031)
       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2466)
       at android.app.ActivityThread.access$1200(ActivityThread.java:152)
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1341)
       at android.os.Handler.dispatchMessage(Handler.java:102)
       at android.os.Looper.loop(Looper.java:135)
       at android.app.ActivityThread.main(ActivityThread.java:5538)
       at java.lang.reflect.Method.invoke(Method.java)
       at java.lang.reflect.Method.invoke(Method.java:372)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:960)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)

The only thing I changed is the library version:

compile 'com.android.support:appcompat-v7:24.1.1'
compile 'com.android.support:support-v13:24.1.1'
compile 'com.android.support:preference-v14:24.1.1'

and the compileSdkVersion/target to api 24.

This is the class generating the error on these devices:

public class PreferencesActivity extends AppCompatPreferenceActivity
        implements SharedPreferences.OnSharedPreferenceChangeListener
{
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        ActionBarUtils.titleBarSetup(getSupportActionBar(), this);
    }

    @Override
    public void onBuildHeaders(List<android.preference.PreferenceActivity.Header> target) {
        loadHeadersFromResource(R.xml.preferences_header, target);
    }

    @Override
    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {

    }

    /**
     * Subclasses should override this method and verify that the given fragment is a valid type to be attached to this
     * activity. The default implementation returns <code>true</code> for apps built for
     * <code>android:targetSdkVersion</code> older than {@link android.os.Build.VERSION_CODES#KITKAT}. For later
     * versions,
     * it will throw an exception.
     *
     * @param fragmentName the class name of the Fragment about to be attached to this activity.
     * @return true if the fragment class name is valid for this Activity and false otherwise.
     */
    @Override
    protected boolean isValidFragment(String fragmentName) {
        if(NetPrefs.class.getName().equals(fragmentName) ||
                LookPrefs.class.getName().equals(fragmentName) ||
                NotifyPrefs.class.getName().equals(fragmentName) ||
                GeneralPrefs.class.getName().equals(fragmentName))
            return true;

        return false;
    }

    public static class NetPrefs extends PreferenceFragment {
        @Override
        public void onCreatePreferences(Bundle bundle, String s) {
            addPreferencesFromResource(R.xml.preferences_net);
        }
    }

    public static class LookPrefs extends PreferenceFragment {
        @Override
        public void onCreatePreferences(Bundle bundle, String s) {
            addPreferencesFromResource(R.xml.preferences_look_feel);
        }
    }

    public static class NotifyPrefs extends PreferenceFragment {
        @Override
        public void onCreatePreferences(Bundle bundle, String s) {
            addPreferencesFromResource(R.xml.preferences_notifies);
        }
    }

    public static class GeneralPrefs extends PreferenceFragment {
        @Override
        public void onCreatePreferences(Bundle bundle, String s) {
            addPreferencesFromResource(R.xml.preferences_general);
        }
    }
}

And this is AppCompatPreferenceActivity:

/*
 * Copyright (C) 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import android.content.res.Configuration;
import android.os.Bundle;
import android.preference.PreferenceActivity;
import android.support.annotation.LayoutRes;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatDelegate;
import android.support.v7.widget.Toolbar;
import android.view.MenuInflater;
import android.view.View;
import android.view.ViewGroup;

/**
 * A {@link android.preference.PreferenceActivity} which implements and proxies the necessary calls
 * to be used with AppCompat.
 *
 * This technique can be used with an {@link android.app.Activity} class, not just
 * {@link android.preference.PreferenceActivity}.
 */
public abstract class AppCompatPreferenceActivity extends PreferenceActivity {

    private AppCompatDelegate mDelegate;

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

    @Override
    protected void onPostCreate(Bundle savedInstanceState) {
        super.onPostCreate(savedInstanceState);
        getDelegate().onPostCreate(savedInstanceState);
    }

    public ActionBar getSupportActionBar() {
        return getDelegate().getSupportActionBar();
    }

    public void setSupportActionBar(@Nullable Toolbar toolbar) {
        getDelegate().setSupportActionBar(toolbar);
    }

    @Override
    public @NonNull MenuInflater getMenuInflater() {
        return getDelegate().getMenuInflater();
    }

    @Override
    public void setContentView(@LayoutRes int layoutResID) {
        getDelegate().setContentView(layoutResID);
    }

    @Override
    public void setContentView(View view) {
        getDelegate().setContentView(view);
    }

    @Override
    public void setContentView(View view, ViewGroup.LayoutParams params) {
        getDelegate().setContentView(view, params);
    }

    @Override
    public void addContentView(View view, ViewGroup.LayoutParams params) {
        getDelegate().addContentView(view, params);
    }

    @Override
    protected void onPostResume() {
        super.onPostResume();
        getDelegate().onPostResume();
    }

    @Override
    protected void onTitleChanged(CharSequence title, int color) {
        super.onTitleChanged(title, color);
        getDelegate().setTitle(title);
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        getDelegate().onConfigurationChanged(newConfig);
    }

    @Override
    protected void onStop() {
        super.onStop();
        getDelegate().onStop();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        getDelegate().onDestroy();
    }

    public void invalidateOptionsMenu() {
        getDelegate().invalidateOptionsMenu();
    }

    private AppCompatDelegate getDelegate() {
        if (mDelegate == null) {
            mDelegate = AppCompatDelegate.create(this, null);
        }
        return mDelegate;
    }
}

and from what I’ve understand (searching here on SO) it seems related to list_container part of sdk 24. Anyway I can’t understand the reason, as I’m using the version backcompatible at least with v14 and unfortunately I don’t have any Huawei device to do some try.

How to&Answers:

If you’re using a custom layout, set the id of whatever ViewGroup you’re using (FrameLayout, etc) to android:id="@android:id/list_container"

Android Studio warns me that this attribute requires API Level 24, but I put it on a device with API level 19 and it seems to work

Answer:

The full source code that prints this error message looks like this

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {

    TypedArray a = mStyledContext.obtainStyledAttributes(null,
            R.styleable.PreferenceFragmentCompat,
            R.attr.preferenceFragmentCompatStyle,
            0);

    mLayoutResId = a.getResourceId(R.styleable.PreferenceFragmentCompat_android_layout,
            mLayoutResId);

    final Drawable divider = a.getDrawable(
            R.styleable.PreferenceFragmentCompat_android_divider);
    final int dividerHeight = a.getDimensionPixelSize(
            R.styleable.PreferenceFragmentCompat_android_dividerHeight, -1);
    final boolean allowDividerAfterLastItem = a.getBoolean(
            R.styleable.PreferenceFragmentCompat_allowDividerAfterLastItem, true);

    a.recycle();

    final LayoutInflater themedInflater = inflater.cloneInContext(mStyledContext);

    final View view = themedInflater.inflate(mLayoutResId, container, false);

    final View rawListContainer = view.findViewById(AndroidResources.ANDROID_R_LIST_CONTAINER);
    if (!(rawListContainer instanceof ViewGroup)) {
        throw new RuntimeException("Content has view with id attribute "
                + "'android.R.id.list_container' that is not a ViewGroup class");
    }

The way I read this is that first it gets the current preference theme from your apps theme. This will end up pulling the value from your styles.xml for example:

<style name="AppTheme" parent="Theme.MaterialComponents.NoActionBar">
    <item name="preferenceTheme">@style/appPreferenceTheme</item>

And that points to a style for the preference screen where it pulls a layout resource value from

<style name="myPreferenceTheme" parent="@style/PreferenceThemeOverlay.v14.Material">
    <item name="android:layout">@layout/a_valid_preference_layout</item>

The requirement is that that layout defined by a_valid_preference_layout must include a ViewGroup child that has the id android.R.id.list_container

So you need a layout resource like a_valid_preference_layout.xml

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

Answer:

U miss setContentView on

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

}