片段重叠中的Android设置

Question

我试图将偏好设置加载到我的片段中，这有效，但我似乎找不到改变布局的方法。现在我有这个问题：

这是我的代码：

public class SettingsFragment extends Fragment {


@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    if (getArguments() != null) {
        mParam1 = getArguments().getString(ARG_PARAM1);
        mParam2 = getArguments().getString(ARG_PARAM2);
    }
    //getFragmentManager().beginTransaction().add(android.R.id.content, new MyPreferenceFragment()).commit();
    getFragmentManager().beginTransaction().add(android.R.id.content, new MyPreferenceFragment()).commit();


}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    return inflater.inflate(R.layout.fragment_settings, container, false);
}


public static class MyPreferenceFragment extends PreferenceFragment {
    @Override
    public void onCreate(final Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        addPreferencesFromResource(R.xml.preferences);

    }
}

在这个stackoverflow上，他们正在做我想要实现的目标，除了setContentView不能在片段How to add a button to PreferenceScreen

中工作

这是我的preference.xml

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
<EditTextPreference
    android:key="username"
    android:summary="Please provide your username"
    android:title="Your Name">

</EditTextPreference>
<CheckBoxPreference
    android:defaultValue="false"
    android:key="applicationUpdates"
    android:summary="This option if selected will allow the application to check for latest versions."
    android:title="Application Updates" />
<ListPreference
    android:defaultValue="1"
    android:entries="@array/listArray"
    android:entryValues="@array/listValues"
    android:key="downloadType"
    android:summary="Select the kind of data that you would like to download"
    android:title="Download Details" />

我的片段xml

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="nl.shacklez.mijnreceptenofficialv1.SettingsFragment">

<!-- TODO: Update blank fragment layout -->
<TextView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
     />

Answer 1

这可以解决您的问题

您添加 Fragment尝试替换Fragment

喜欢替换

 getFragmentManager().beginTransaction().add(android.R.id.content, new MyPreferenceFragment()).commit();

通过

 getFragmentManager().beginTransaction().replace(android.R.id.content, new MyPreferenceFragment()).commit();

Answer 2

您将片段设置为视图两次。您在onCreateView中设置它 - 它实例化一个新的preferenceFragment

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                     Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_settings, container, false);
}

然后你正在打电话

getFragmentManager().beginTransaction().add(android.R.id.content, new MyPreferenceFragment()).commit();

再次调用您的preferenceFragment的onCreate，因此您将片段绑定两次。