鸿蒙开发的音乐服务卡片.zip

package com.mingyang.servicecard1.widget.controller; import ohos.app.Context; import ohos.data.DatabaseHelper; import ohos.data.preferences.Preferences; import ohos.hiviewdfx.HiLog; import ohos.hiviewdfx.HiLogLabel; import ohos.utils.zson.ZSONObject; import java.lang.reflect.InvocationTargetException; import java.util.HashMap; import java.util.Locale; import java.util.Map; import java.util.List; import java.util.ArrayList; /** * Form controller manager. */ public class FormControllerManager { private static final HiLogLabel TAG = new HiLogLabel(HiLog.DEBUG, 0x0, FormControllerManager.class.getName()); private static final String PACKAGE_PATH = "com.mingyang.servicecard1.widget"; private static final String SHARED_SP_NAME = "form_info_sp.xml"; private static final String FORM_NAME = "formName"; private static final String DIMENSION = "dimension"; private volatile static FormControllerManager managerInstance = null; private final HashMap<Long, FormController> controllerHashMap = new HashMap<>(); private final Context context; private final Preferences preferences; /** * Constructor with context. * * @param context instance of Context. */ private FormControllerManager(Context context) { this.context = context; DatabaseHelper databaseHelper = new DatabaseHelper(this.context.getApplicationContext()); preferences = databaseHelper.getPreferences(SHARED_SP_NAME); } /** * Singleton mode. * * @param context instance of Context. * @return FormControllerManager instance. */ public static FormControllerManager getInstance(Context context) { if (managerInstance == null) { synchronized (FormControllerManager.class) { if (managerInstance == null) { managerInstance = new FormControllerManager(context); } } } return managerInstance; } /** * Save the form id and form name. * * @param formId form id. * @param formName form name. * @param dimension form dimension * @return FormController form controller */ public FormController createFormController(long formId, String formName, int dimension) { synchronized (controllerHashMap) { if (formId < 0 || formName.isEmpty()) { return null; } HiLog.info(TAG, "saveFormId() formId: " + formId + ", formName: " + formName + ", preferences: " + preferences); if (preferences != null) { ZSONObject formObj = new ZSONObject(); formObj.put(FORM_NAME, formName); formObj.put(DIMENSION, dimension); preferences.putString(Long.toString(formId), ZSONObject.toZSONString(formObj)); preferences.flushSync(); } // Create controller instance. FormController controller = newInstance(formName, dimension, context); // Cache the controller. if (controller != null) { if (!controllerHashMap.containsKey(formId)) { controllerHashMap.put(formId, controller); } } return controller; } } /** * Get the form controller instance. * * @param formId form id. * @return the instance of form controller. */ public FormController getController(long formId) { synchronized (controllerHashMap) { if (controllerHashMap.containsKey(formId)) { return controllerHashMap.get(formId); } Map<String, ?> forms = preferences.getAll(); String formIdString = Long.toString(formId); if (forms.containsKey(formIdString)) { ZSONObject formObj = ZSONObject.stringToZSON((String) forms.get(formIdString)); String formName = formObj.getString(FORM_NAME); int dimension = formObj.getIntValue(DIMENSION); FormController controller = newInstance(formName, dimension, context); controllerHashMap.put(formId, controller); } return controllerHashMap.get(formId); } } private FormController newInstance(String formName, int dimension, Context context) { FormController ctrInstance = null; if (formName == null || formName.isEmpty()) { HiLog.error(TAG, "newInstance() get empty form name"); return ctrInstance; } try { String className = PACKAGE_PATH + "." + formName.toLowerCase(Locale.ROOT) + "." + getClassNameByFormName(formName); Class<?> clazz = Class.forName(className); if (clazz != null) { Object controllerInstance = clazz.getConstructor(Context.class, String.class, Integer.class) .newInstance(context, formName, dimension); if (controllerInstance instanceof FormController) { ctrInstance = (FormController) controllerInstance; } } } catch (NoSuchMethodException | InstantiationException | IllegalArgumentException | InvocationTargetException | IllegalAccessException | ClassNotFoundException | SecurityException exception) { HiLog.error(TAG, "newInstance() get exception: " + exception.getMessage()); } return ctrInstance; } /** * Get all form id from the share preference * * @return form id list */ public List<Long> getAllFormIdFromSharePreference() { List<Long> result = new ArrayList<>(); Map<String, ?> forms = preferences.getAll(); for (String formId : forms.keySet()) { result.add(Long.parseLong(formId)); } return result; } /** * Delete a form controller * * @param formId form id */ public void deleteFormController(long formId) { synchronized (controllerHashMap) { preferences.delete(Long.toString(formId)); preferences.flushSync(); controllerHashMap.remove(formId); } } private String getClassNameByFormName(String formName) { String[] strings = formName.split("_"); StringBuilder result = new StringBuilder(); for (String string : strings) { result.append(string); } char[] charResult = result.toString().toCharArray(); charResult[0] = (charResult[0] >= 'a' && charResult[0] <= 'z') ? (char) (charResult[0] - 32) : charResult[0]; return String.copyValueOf(charResult) + "Impl"; } }