在代码中创建层次结构 Android Jetpack 的一部分。

您可以通过 onCreatePreferences()。 以下示例演示了一种通过编程方式创建 通过 XML 创建的偏好设置屏幕， 概览页面。接收者 以编程方式创建屏幕，创建每项设置，并设置其相关程度 属性，然后将其添加到偏好设置屏幕：

Kotlin

override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
    val context = preferenceManager.context
    val screen = preferenceManager.createPreferenceScreen(context)

    val notificationPreference = SwitchPreferenceCompat(context)
    notificationPreference.key = "notifications"
    notificationPreference.title = "Enable message notifications"

    val feedbackPreference = Preference(context)
    feedbackPreference.key = "feedback"
    feedbackPreference.title = "Send feedback"
    feedbackPreference.summary = "Report technical issues or suggest new features"

    screen.addPreference(notificationPreference)
    screen.addPreference(feedbackPreference)

    preferenceScreen = screen
}

Java

@Override
public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
    Context context = getPreferenceManager().getContext();
    PreferenceScreen screen = getPreferenceManager().createPreferenceScreen(context);

    SwitchPreferenceCompat notificationPreference = new SwitchPreferenceCompat(context);
    notificationPreference.setKey("notifications");
    notificationPreference.setTitle("Enable message notifications");

    Preference feedbackPreference = new Preference(context);
    feedbackPreference.setKey("feedback");
    feedbackPreference.setTitle("Send feedback");
    feedbackPreference.setSummary("Report technical issues or suggest new features");

    screen.addPreference(notificationPreference);
    screen.addPreference(feedbackPreference);

    setPreferenceScreen(screen);
}

添加一个 PreferenceCategory为 相似。以下示例演示了创建 显示偏好设置屏幕 整理设置。 子节点会添加到 PreferenceCategory 中，而不是根位置 PreferenceScreen。

Kotlin

override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
    val context = preferenceManager.context
    val screen = preferenceManager.createPreferenceScreen(context)

    val notificationPreference = SwitchPreferenceCompat(context)
    notificationPreference.key = "notifications"
    notificationPreference.title = "Enable message notifications"

    val notificationCategory = PreferenceCategory(context)
    notificationCategory.key = "notifications_category"
    notificationCategory.title = "Notifications"
    screen.addPreference(notificationCategory)
    notificationCategory.addPreference(notificationPreference)

    val feedbackPreference = Preference(context)
    feedbackPreference.key = "feedback"
    feedbackPreference.title = "Send feedback"
    feedbackPreference.summary = "Report technical issues or suggest new features"

    val helpCategory = PreferenceCategory(context)
    helpCategory.key = "help"
    helpCategory.title = "Help"
    screen.addPreference(helpCategory)
    helpCategory.addPreference(feedbackPreference)

    preferenceScreen = screen
}

Java

@Override
public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
    Context context = getPreferenceManager().getContext();
    PreferenceScreen screen = getPreferenceManager().createPreferenceScreen(context);

    SwitchPreferenceCompat notificationPreference = new SwitchPreferenceCompat(context);
    notificationPreference.setKey("notifications");
    notificationPreference.setTitle("Enable message notifications");

    PreferenceCategory notificationCategory = new PreferenceCategory(context);
    notificationCategory.setKey("notifications_category");
    notificationCategory.setTitle("Notifications");
    screen.addPreference(notificationCategory);
    notificationCategory.addPreference(notificationPreference);

    Preference feedbackPreference = new Preference(context);
    feedbackPreference.setKey("feedback");
    feedbackPreference.setTitle("Send feedback");
    feedbackPreference.setSummary("Report technical issues or suggest new features");

    PreferenceCategory helpCategory = new PreferenceCategory(context);
    helpCategory.setKey("help");
    helpCategory.setTitle("Help");
    screen.addPreference(helpCategory);
    helpCategory.addPreference(feedbackPreference);

    setPreferenceScreen(screen);
}