添加本地存储和log

app/src/main/ets/pages/Index.ets

@@ -6,6 +6,7 @@ import { router, window } from '@kit.ArkUI';
 import { WebPageDialog } from './web/WebPageDialog'
 import promptAction from '@ohos.promptAction';
 import { BusinessError } from '@ohos.base';
+import { Log } from '../utils/Log';
 
 @CustomDialog
 struct WebViewDialog {
@@ -75,17 +76,17 @@ struct Index {
     }).then((result: promptAction.ShowDialogSuccessResponse) => {
       if (result.index === 0) {
         // 用户点击了“取消”按钮
-        console.info('User canceled the operation.');
+        Log.i('User canceled the operation.');
       } else if (result.index === 1) {
         // 用户点击了“确认”按钮
-        console.info('User confirmed the operation.');
+        Log.i('User confirmed the operation.');
         // 调用router.back()方法，返回上一个页面
         router.back();
       }
     }).catch((err: Error) => {
       let message = (err as BusinessError).message
       let code = (err as BusinessError).code
-      console.error(`Invoke showDialog failed, code is ${code}, message is ${message}`);
+      Log.i(`Invoke showDialog failed, code is ${code}, message is ${message}`);
     })
     return true;
   }

app/src/main/ets/utils/LocalStorge.ets

@@ -0,0 +1,65 @@
+
+import { Context } from '@kit.AbilityKit';
+import dataPreferences from '@ohos.data.preferences';
+import { Log } from './Log';
+
+export class LocalStorageKey {
+  static readonly KEY_SERVER_CONFIG = "key_config";
+}
+
+export class LocalStorage {
+
+  private static instance: LocalStorage;
+  private static lock: boolean = false;
+  private static readonly XY_DP_Name = "LocalData";
+  static getInstance(): LocalStorage {
+    if (!LocalStorage.instance) {
+      if (!LocalStorage.lock) {
+        LocalStorage.lock = true;
+        LocalStorage.instance = new LocalStorage();
+        LocalStorage.lock = false;
+      }
+    }
+    return LocalStorage.instance;
+  }
+
+  private context: Context | null = null;
+  private preferences: dataPreferences.Preferences | null = null;
+  private constructor() {
+  }
+
+  public init(context: Context): void {
+    if (!this.context) {
+      this.context = context.getApplicationContext();
+      let options: dataPreferences.Options = { name: LocalStorage.XY_DP_Name };
+      this.preferences = dataPreferences.getPreferencesSync(this.context, options);
+    } else {
+      Log.i("LocalStorage is already init.")
+    }
+  }
+
+  public putData(key: string, value: dataPreferences.ValueType) {
+    Log.i(`put sp data, key:${key}, value:${value}`)
+    this.preferences?.putSync(key, value);
+    this.preferences?.flush();
+  }
+
+  public clearData(key: string) {
+    this.preferences?.delete(key);
+    this.preferences?.flush();
+  }
+
+  public getData(key: string, defaultValue: dataPreferences.ValueType): dataPreferences.ValueType | undefined {
+    let value = this.preferences?.getSync(key, defaultValue);
+    Log.i(`get sp data, key:${key}, value:${value}`)
+    return value;
+  }
+
+  public getObject<T>(key: string): T {
+    let value = this.getData(key, "{}") as string;
+    if (value.toString().length > 0) {
+      return JSON.parse(value) as T;
+    }
+    return "{}" as T;
+  }
+}

app/src/main/ets/utils/Log.ets

@@ -0,0 +1,33 @@
+
+import hilog from '@ohos.hilog';
+
+let domain: number = 0xFF00;
+let prefix: string = 'HM4Demo';
+let format: string = `%{public}s, %{public}s`;
+
+export class Log {
+
+  static d(...args: string[]) {
+    hilog.debug(domain, prefix, format, args);
+  }
+
+  static i(...args: string[]) {
+    hilog.info(domain, prefix, format, args);
+  }
+
+  static w(...args: string[]) {
+    hilog.warn(domain, prefix, format, args);
+  }
+
+  static e(...args: string[]) {
+    hilog.error(domain, prefix, format, args);
+  }
+
+  static f(...args: string[]) {
+    hilog.fatal(domain,prefix, format, args);
+  }
+
+  static isLoggable(level: number) {
+    hilog.isLoggable(domain, prefix, level);
+  }
+}