关于Android 5.1系统的Settings的分析

在整个Settings里面activityPreference和listPreference这类的偏好设置用的特别多所以相应的xml文件也相当的多

先从Settings的主页面SettingsActivity.java说起吧

在SettingsActivity.java的onCreate里面会进行判断导入哪个布局:

setContentView(mIsShowingDashboard ?                R.layout.settings_main_dashboard : R.layout.settings_main_prefs);

这两个布局是一级页面和二级页面,一级页面也就是主页面,点击主页面里的选项就会进入二级页面

两个布局里都有id为main_content的FrameLayout控件

一级页面的所有东西都是在上面显示的,像wifi啊,蓝牙啊等等

而显示的wifi,蓝牙什么的就是通过解析dashboard_categories.xml得出来的

private void buildDashboardCategories(List<DashboardCategory> categories) {        categories.clear();        loadCategoriesFromResource(R.xml.dashboard_categories, categories);        updateTilesList(categories);    }

dashboard_categories.xml:

<dashboard-categories        xmlns:android="http://schemas.android.com/apk/res/android">    <!-- WIRELESS and NETWORKS -->    <dashboard-category            android:id="@+id/wireless_section"            android:title="@string/header_category_wireless_networks" >        <!-- Wifi -->        <dashboard-tile                android:id="@+id/wifi_settings"                android:title="@string/wifi_settings_title"                android:fragment="com.android.settings.wifi.WifiSettings"                android:icon="@drawable/ic_settings_wireless"                />        <!--HetComm-->        <dashboard-tile                android:id="@+id/hetcomm_settings"                android:icon="@drawable/ic_settings_hetcomm"                android:title="@string/hetcom_setting_title">            <intent android:action="com.android.settings.HETCOMM_SETTINGS" />        </dashboard-tile>        <!-- Bluetooth -->        <dashboard-tile                android:id="@+id/bluetooth_settings"                android:title="@string/bluetooth_settings_title"                android:fragment="com.android.settings.bluetooth.BluetoothSettings"                android:icon="@drawable/ic_settings_bluetooth2"                />                        <!-- Hotknot -->        <dashboard-tile                android:id="@+id/hotknot_settings"                android:title="@string/hotknot_settings_title"                android:fragment="com.mediatek.settings.hotknot.HotKnotSettings"                android:icon="@drawable/ic_settings_hotknot"                 />        <!-- SIM Cards -->        <dashboard-tile                android:id="@+id/sim_settings"                android:title="@string/sim_settings_title"                android:fragment="com.android.settings.sim.SimSettings"                android:icon="@drawable/ic_sim_sd"                />        <!-- Data Usage -->        <dashboard-tile                android:id="@+id/data_usage_settings"                android:title="@string/data_usage_summary_title"                android:fragment="com.android.settings.DataUsageSummary"                android:icon="@drawable/ic_settings_data_usage"                />        <!-- Operator hook -->        <dashboard-tile                android:id="@+id/operator_settings"                android:fragment="com.android.settings.WirelessSettings" >            <intent android:action="com.android.settings.OPERATOR_APPLICATION_SETTING" />        </dashboard-tile>        <!-- Other wireless and network controls -->        <dashboard-tile                android:id="@+id/wireless_settings"                android:title="@string/radio_controls_title"                android:fragment="com.android.settings.WirelessSettings"                android:icon="@drawable/ic_settings_more"                />    </dashboard-category>    <!-- DEVICE -->    <dashboard-category            android:id="@+id/device_section"            android:title="@string/header_category_device" >        <!-- Home -->        <dashboard-tile                android:id="@+id/home_settings"                android:title="@string/home_settings"                android:fragment="com.android.settings.HomeSettings"                android:icon="@drawable/ic_settings_home"                />        <!-- Display -->        <dashboard-tile                android:id="@+id/display_settings"                android:title="@string/display_settings"                android:fragment="com.android.settings.DisplaySettings"                android:icon="@drawable/ic_settings_display"                />        <!-- Notifications -->        <dashboard-tile                android:id="@+id/notification_settings"                android:title="@string/notification_settings"                android:fragment="com.mediatek.audioprofile.AudioProfileSettings"                android:icon="@drawable/ic_settings_notifications"                />        <!-- Storage -->        <dashboard-tile                android:id="@+id/storage_settings"                android:title="@string/storage_settings"                android:fragment="com.android.settings.deviceinfo.Memory"                android:icon="@drawable/ic_settings_storage"                />        <!-- Battery -->        <dashboard-tile                android:id="@+id/battery_settings"                android:title="@string/power_usage_summary_title"                android:fragment="com.android.settings.fuelgauge.PowerUsageSummary"                android:icon="@drawable/ic_settings_battery"                />        <!-- Application Settings -->        <dashboard-tile                android:id="@+id/application_settings"                android:title="@string/applications_settings"                android:fragment="com.android.settings.applications.ManageApplications"                android:icon="@drawable/ic_settings_applications"                />        <!-- Manage users -->        <dashboard-tile                android:id="@+id/user_settings"                android:title="@string/user_settings_title"                android:fragment="com.android.settings.users.UserSettings"                android:icon="@drawable/ic_settings_multiuser"                />        <!-- Manage NFC payment apps -->        <dashboard-tile                android:id="@+id/nfc_payment_settings"                android:title="@string/nfc_payment_settings_title"                android:fragment="com.android.settings.nfc.PaymentSettings"                android:icon="@drawable/ic_settings_nfc_payment"                />        <!-- Manufacturer hook -->        <dashboard-tile                android:id="@+id/manufacturer_settings"                android:fragment="com.android.settings.WirelessSettings">            <intent android:action="com.android.settings.MANUFACTURER_APPLICATION_SETTING" />        </dashboard-tile>    </dashboard-category>    <!-- PERSONAL -->    <dashboard-category            android:id="@+id/personal_section"            android:title="@string/header_category_personal" >        <!-- Location -->        <dashboard-tile                android:id="@+id/location_settings"                android:title="@string/location_settings_title"                android:fragment="com.android.settings.location.LocationSettings"                android:icon="@drawable/ic_settings_location"                />        <!-- Security -->        <dashboard-tile                android:id="@+id/security_settings"                android:title="@string/security_settings_title"                android:fragment="com.android.settings.SecuritySettings"                android:icon="@drawable/ic_settings_security"                />        <!-- Account -->        <dashboard-tile                android:id="@+id/account_settings"                android:title="@string/account_settings_title"                android:fragment="com.android.settings.accounts.AccountSettings"                android:icon="@drawable/ic_settings_accounts"                />        <!-- Language -->        <dashboard-tile                android:id="@+id/language_settings"                android:title="@string/language_settings"                android:fragment="com.android.settings.inputmethod.InputMethodAndLanguageSettings"                android:icon="@drawable/ic_settings_language"                />        <!-- Backup and reset -->        <dashboard-tile                android:id="@+id/privacy_settings"                android:title="@string/privacy_settings"                android:fragment="com.android.settings.PrivacySettings"                android:icon="@drawable/ic_settings_backup"                />    </dashboard-category>    <!-- SYSTEM -->    <dashboard-category        android:id="@+id/system_section"        android:title="@string/header_category_system" >        <!-- Date & Time -->        <dashboard-tile                android:id="@+id/date_time_settings"                android:title="@string/date_and_time_settings_title"                android:fragment="com.android.settings.DateTimeSettings"                android:icon="@drawable/ic_settings_date_time"                />        <!--Scheduled power on&off-->        <dashboard-tile                android:id="@+id/power_settings"                android:icon="@drawable/ic_settings_schpwronoff"                android:title="@string/schedule_power_on_off_settings_title">            <intent android:action="com.android.settings.SCHEDULE_POWER_ON_OFF_SETTING" />        </dashboard-tile>        <!-- Accessibility feedback -->        <dashboard-tile                android:id="@+id/accessibility_settings"                android:title="@string/accessibility_settings"                android:fragment="com.android.settings.accessibility.AccessibilitySettings"                android:icon="@drawable/ic_settings_accessibility"                />        <!-- Print -->        <dashboard-tile                android:id="@+id/print_settings"                android:title="@string/print_settings"                android:fragment="com.android.settings.print.PrintSettingsFragment"                android:icon="@drawable/ic_settings_print"                />        <!-- Development -->        <dashboard-tile                android:id="@+id/development_settings"                android:title="@string/development_settings_title"                android:fragment="com.android.settings.DevelopmentSettings"                android:icon="@drawable/ic_settings_development"                />        <!-- About Device -->        <dashboard-tile                android:id="@+id/about_settings"                android:title="@string/about_settings"                android:fragment="com.android.settings.DeviceInfoSettings"                android:icon="@drawable/ic_settings_about"                />    </dashboard-category></dashboard-categories>

如果你想要去掉某一个就找到 updateTilesList(List<DashboardCategory> target)这个方法

在它的for循环里加一个对应的

else if (id == R.id.battery_settings) {     removeTile = true;     }

这样就可以了.解析的时候还涉及到DashboardSummary.java等一些类,具体不详说

然后点击某个选项的时候通过switchToFragment(String fragmentName, Bundle args, boolean validate,
            boolean addToBackStack, int titleResId, CharSequence title, boolean withTransition) {
        if (validate && !isValidFragment(fragmentName))

这个类判断打开那个fragment