[游戏开发]【Android】【UI】PreferenceFragmentCompat

想要创建个SettingsFragment， 发现Android Studio有现成的：

class SettingsFragment : PreferenceFragmentCompat() {

    companion object{
        val TAG: String = SettingsFragment::class.java.simpleName
    }

    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
        setPreferencesFromResource(R.xml.root_preferences, rootKey)
    }
}

root_preferences.xml

<PreferenceScreen xmlns:app="http://schemas.android.com/apk/res-auto">

    <PreferenceCategory app:title="@string/messages_header">

        <EditTextPreference
            app:key="signature"
            app:title="@string/signature_title"
            app:icon="@drawable/icon"
            app:defaultValue="60"
            app:iconSpaceReserved="false"
            app:useSimpleSummaryProvider="true" />

        <ListPreference
            app:defaultValue="reply"
            app:entries="@array/reply_entries"
            app:entryValues="@array/reply_values"
            app:key="reply"
            app:title="@string/reply_title"
            app:useSimpleSummaryProvider="true" />

    </PreferenceCategory>

    <PreferenceCategory app:title="@string/sync_header">

        <SwitchPreferenceCompat
            app:key="sync"
            app:title="@string/sync_title" />

        <SwitchPreferenceCompat
            app:dependency="sync"
            app:key="attachment"
            app:summaryOff="@string/attachment_summary_off"
            app:summaryOn="@string/attachment_summary_on"
            app:title="@string/attachment_title" />

    </PreferenceCategory>

</PreferenceScreen>

array.xml

<resources>
    <!-- Reply Preference -->
    <string-array name="reply_entries">
        <item>Reply</item>
        <item>Reply to all</item>
    </string-array>

    <string-array name="reply_values">
        <item>reply</item>
        <item>reply_all</item>
    </string-array>
</resources>

效果:

点击响应

override fun onPreferenceTreeClick(preference: Preference?): Boolean {
    val connectionMode: SwitchPreferenceCompat? = findPreference("connect")
    // Switch preference change listener
    connectionMode?.setOnPreferenceChangeListener{ _, newValue ->
        if (newValue == true){
            //Do somethings
        }else{
            //Do somethings
        }
        true
    }
}

如果不是执行操作，只是存储数据到SharePreference里，无需去监听onPreferenceTreeClick和setOnPreferenceChangeListener, 系统会将数据存储到app所在的目录data/data/com.example.demo/shared_prefs/com.example.demo_preferences.xml

<?xml version='1.0' encoding='utf-8' standalone='yes' ?>
<map>
    <boolean name="attachment" value="true" />
    <string name="signature">Not set</string>
    <string name="reply">reply_all</string>
    <boolean name="sync" value="true" />
</map>

链接：整理设置

Customize your settings