原文连接

我们在项目中经常需要用到设置(Setting)，在安卓中主要使用android.preference.PreferenceFragment 和 android.support.v7.preference.PreferenceFragmentCompat，在Android API 28中PreferenceFragment已经过时,推荐使用PreferenceFragmentCompat

This class was deprecated in API level 28.

Use PreferenceFragmentCompat

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添加依赖

implementation group: 'com.android.support', name: 'preference-v7', version: '28.0.0'

创建配置文件

app\src\main\res\xml\preference_setting.xml

xmlns:android="http://schemas.android.com/apk/res/android"

android:title="@string/root_title">

android:key="basic_preference"

android:title="@string/title_basic_preference"

android:summary="@string/summary_basic_preference" />

android:key="stylish_preference"

android:title="@string/title_stylish_preference"

android:summary="@string/summary_stylish_preference" />

android:key="preference_with_icon"

android:title="Preference with icon"

android:summary="This preference has an icon"

android:icon="@android:drawable/ic_menu_camera" />

android:title="@string/inline_preferences">

android:key="checkbox_preference"

android:title="@string/title_checkbox_preference"

android:summary="@string/summary_checkbox_preference" />

android:key="switch_preference"

android:title="Switch preference"

android:summary="This is a switch" />

android:key="dropdown_preference"

android:title="@string/title_dropdown_preference"

android:summary="@string/summary_dropdown_preference"

android:entries="@array/entries_list_preference"

android:entryValues="@array/entryvalues_list_preference" />

android:title="@string/dialog_based_preferences">

android:key="edittext_preference"

android:title="@string/title_edittext_preference"

android:summary="@string/summary_edittext_preference"

android:dialogTitle="@string/dialog_title_edittext_preference" />

android:key="list_preference"

android:title="@string/title_list_preference"

android:summary="@string/summary_list_preference"

android:entries="@array/entries_list_preference"

android:entryValues="@array/entryvalues_list_preference"

android:dialogTitle="@string/dialog_title_list_preference" />

android:key="multi_select_list_preference"

android:title="@string/title_multi_list_preference"

android:summary="@string/summary_multi_list_preference"

android:entries="@array/entries_list_preference"

android:entryValues="@array/entryvalues_list_preference"

android:dialogTitle="@string/dialog_title_multi_list_preference" />

android:title="@string/launch_preferences">

android:key="screen_preference"

android:title="@string/title_screen_preference"

android:summary="@string/summary_screen_preference">

android:key="next_screen_checkbox_preference"

android:title="@string/title_next_screen_toggle_preference"

android:summary="@string/summary_next_screen_toggle_preference" />

android:title="@string/title_intent_preference"

android:summary="@string/summary_intent_preference">

android:data="http://www.android.com" />

android:title="@string/preference_attributes">

android:key="parent_checkbox_preference"

android:title="@string/title_parent_preference"

android:summary="@string/summary_parent_preference" />

android:key="child_checkbox_preference"

android:dependency="parent_checkbox_preference"

android:layout="?android:attr/preferenceLayoutChild"

android:title="@string/title_child_preference"

android:summary="@string/summary_child_preference" />

创建SettingFragment

使用addPreferencesFromResource方法添加上一部添加的方法

public class SettingsFragment extends PreferenceFragmentCompat{

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

addPreferencesFromResource(R.xml.preference_setting.xml);

}

}

保存与检索

PreferenceFragmentCompat自动保存用户选择的配置信息，然后我们可以通过getDefaultSharedPreferences(android.content.Context)读取键值对配置信息

参考连接