android 12 添加菜单

1.创建一级菜单

packages\apps\Settings\res\xml\top_level_settings.xml

<com.android.settings.widget.HomepagePreferenceandroid:fragment="com.android.settings.DeviceStatusSettings"android:icon="@drawable/ic_settings_display_white"android:key="top_level_device_status"android:order="-80"android:title="@string/device_status_settings"android:summary="@string/device_status_dashboard_summary"settings:controller="com.android.settings.devicestatus.TopLevelDeviceStatusPreferenceController"/>

DeviceStatusSettings 

@SearchIndexable(forTarget = SearchIndexable.ALL & ~SearchIndexable.ARC)
public class DeviceStatusSettings extends DashboardFragment {private static final String TAG = "DeviceStatusSettings";private static final String KET_SPK_MODE_SETTINGS = "spk_mode_settings";@Overridepublic int getMetricsCategory() {return SettingsEnums.DISPLAY;}@Overrideprotected String getLogTag() {return TAG;}@Overrideprotected int getPreferenceScreenResId() {return R.xml.device_status_setting;}@Overridepublic void onCreate(Bundle icicle) {super.onCreate(icicle);}@Overrideprotected List<AbstractPreferenceController> createPreferenceControllers(Context context) {return buildPreferenceControllers(context, getSettingsLifecycle());}@Overridepublic int getHelpResource() {return R.string.help_uri_display;}private static List<AbstractPreferenceController> buildPreferenceControllers(Context context, Lifecycle lifecycle) {final List<AbstractPreferenceController> controllers = new ArrayList<>();controllers.add(new SpkModePreferenceController(context, KET_SPK_MODE_SETTINGS));return controllers;}public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =new BaseSearchIndexProvider(R.xml.device_status_setting) {@Overridepublic List<AbstractPreferenceController> createPreferenceControllers(Context context) {return buildPreferenceControllers(context, null);}};
}

TopLevelDeviceStatusPreferenceController

public class TopLevelDeviceStatusPreferenceController extends BasePreferenceController {public TopLevelDeviceStatusPreferenceController(Context context, String preferenceKey) {super(context, preferenceKey);}@Overridepublic int getAvailabilityStatus() {return AVAILABLE;}
}

 2.创建二级菜单

<PreferenceScreenxmlns:android="http://schemas.android.com/apk/res/android"xmlns:settings="http://schemas.android.com/apk/res-auto"android:key="display_settings_screen"android:title="@string/device_status_settings"settings:keywords="@string/keywords_display"><PreferenceCategoryandroid:title="@string/device_spk_mode"><com.android.settingslib.RestrictedPreferenceandroid:key="device_spk_mode"android:title="@string/device_spk_mode"android:summary="@string/summary_placeholder"android:fragment="com.android.settings.devicestatus.SpkModeSettings"settings:controller="com.android.settings.devicestatus.SpkModePreferenceController"/></PreferenceCategory>
</PreferenceScreen>

SpkModeSettings 

public class SpkModeSettings extends RadioButtonPickerFragment {private static final String TAG = "SpkModeSettings";public static final int FALLBACK_VALUE = 0;private static final String SPK_MODE_BROADCAST = "android.intent.action.SPK_MODE";private static final String SPK_MODE_PERSIST = "persist.realbom.spkmode";@Overridepublic void onAttach(Context context) {super.onAttach(context);}@Overrideprotected List<? extends CandidateInfo> getCandidates() {final String[] entries = entries();final String[] values = keys();final List<SpkModeControlCandidateInfo> candidates = new ArrayList<>();if (entries == null || entries.length <= 0) return null;if (values == null || values.length != entries.length) {throw new IllegalArgumentException("Entries and values must be of the same length.");}for (int i = 0; i < entries.length; i++) {candidates.add(new SpkModeControlCandidateInfo(entries[i], values[i]));}return candidates;}private String[] entries() {return getResources().getStringArray(R.array.spk_mode_entries);}private String[] keys() {return getResources().getStringArray(R.array.spk_mode_values);}@Overrideprotected String getDefaultKey() {return getCurrentSkpModeValue(getContext());}@Overrideprotected boolean setDefaultKey(String key) {setCurrentSkpModeValue(getContext(), key);return true;}@Overrideprotected int getPreferenceScreenResId() {return R.xml.spk_mode;}@Overridepublic int getMetricsCategory() {return 1;}private String getCurrentSkpModeValue(Context context) {if (context == null) {return Long.toString(FALLBACK_VALUE);} else {return SystemProperties.get(SPK_MODE_PERSIST, "0");}}private void setCurrentSkpModeValue(Context context, String key) {try {if (context != null) {Log.d(TAG,"set current value ==  "+key);int value = Integer.parseInt((String) key);SystemProperties.set(SPK_MODE_PERSIST, String.valueOf(value));//Settings.System.putInt(context.getContentResolver(), SPK_MODE, value);setSkpModeValue(context,value);}} catch (NumberFormatException e) {Log.e(TAG, "could not persist screen timeout setting", e);}}@Overrideprotected void onSelectionPerformed(boolean success) {super.onSelectionPerformed(success);//getActivity().finish();}private final class SpkModeControlCandidateInfo extends CandidateInfo {private final String name;private final String key;SpkModeControlCandidateInfo(String title, String value) {super(true);name = title;key = value;}@Overridepublic CharSequence loadLabel() {return name;}@Overridepublic Drawable loadIcon() {return null;}@Overridepublic String getKey() {return key;}}private void setSkpModeValue(Context context, int value){Intent intent = new Intent();intent.setAction(SPK_MODE_BROADCAST);//intent.putExtra("com",4);intent.putExtra("value",value);context.sendBroadcast(intent);}}

SpkModePreferenceController 

public class SpkModePreferenceController extends BasePreferenceController {public static String PREF_NAME = "spk_mode";public static String TAG = "SpkModePreferenceController";public static final int FALLBACK_VALUE = 0;private final CharSequence[] mEntries;private final CharSequence[] mValues;private static final String SPK_MODE_BROADCAST = "android.intent.action.SPK_MODE";private static final String SPK_MODE_PERSIST = "persist.realbom.spkmode";public SpkModePreferenceController(Context context, String key) {super(context, key);mEntries = context.getResources().getStringArray(R.array.spk_mode_entries);mValues = context.getResources().getStringArray(R.array.spk_mode_values);}@Overridepublic int getAvailabilityStatus() {return AVAILABLE;}@Overridepublic void updateState(Preference preference) {final long curValue = Long.valueOf(SystemProperties.get(SPK_MODE_PERSIST,"0"));updatePreferenceDescription(preference, curValue);Log.d(TAG, "updateState currentValue= "+String.valueOf(curValue));}public static CharSequence getDescription(long curValue, CharSequence[] entries, CharSequence[] values) {if (curValue < 0 || entries == null || values == null || values.length != entries.length) {return null;}for (int i = 0; i < values.length; i++) {long temp = Long.parseLong(values[i].toString());if (curValue == temp) {Log.d(TAG,"Description entries == "+entries[i]);return entries[i];}}return null;}private void updatePreferenceDescription(Preference preference,long curValue) {final CharSequence summary;summary = getDescription(curValue, mEntries, mValues);preference.setSummary(summary);} 
}

 

<PreferenceScreenxmlns:android="http://schemas.android.com/apk/res/android"android:title="@string/device_spk_mode"/>