增加权限申请工具类

@@ -34,4 +34,6 @@ export { PermissionUtil } from './src/main/ets/utils/PermissionUtil'
 
 export { UserDataLocal } from './src/main/ets/utils/UserDataLocal'
 
-export { NumberFormatterUtils } from './src/main/ets/utils/NumberFormatterUtils'
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+export { NumberFormatterUtils } from './src/main/ets/utils/NumberFormatterUtils'
+
+export { PermissionUtils } from './src/main/ets/utils/PermissionUtils'
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+import { abilityAccessCtrl, bundleManager, common, Permissions, Want } from '@kit.AbilityKit'
+import { BusinessError } from '@kit.BasicServicesKit'
+import { AppUtils } from './AppUtils'
+import { Logger } from './Logger'
+
+/**
+ * 权限工具类
+ * */
+export class PermissionUtils {
+  //相机权限
+  static CAMERA: Permissions = 'ohos.permission.CAMERA'
+  //文件权限
+  static READ_MEDIA: Permissions = 'ohos.permission.READ_MEDIA'
+  static WRITE_MEDIA: Permissions = 'ohos.permission.WRITE_MEDIA'
+  private static tokenId: number = 0
+
+  /**检查权限是否授权*/
+  static async checkPermissions(permission: Permissions): Promise<boolean> {
+    let hasPermissions = false;
+    let grantStatus: abilityAccessCtrl.GrantStatus = await PermissionUtils.checkAccessToken(permission);
+
+    if (grantStatus === abilityAccessCtrl.GrantStatus.PERMISSION_GRANTED) {
+      // 已经授权，可以继续访问目标操作
+      hasPermissions = true;
+    } else {
+      hasPermissions = false;
+      // 申请日历权限
+    }
+    return hasPermissions;
+  }
+
+  /**动态申请权限*/
+  static reqPermissionsFromUser(permissions: Array<Permissions>, component: Object): Promise<boolean> {
+
+    return new Promise((resolve, fail) => {
+      let context = getContext(component) as common.UIAbilityContext;
+      let atManager = abilityAccessCtrl.createAtManager();
+      atManager.requestPermissionsFromUser(context, permissions).then((data) => {
+        let grantStatus: Array<number> = data.authResults;
+        let length: number = grantStatus.length;
+
+        for (let i = 0; i < length; i++) {
+          if (grantStatus[i] === 0) {
+            // 用户授权，可以继续访问目标操作
+            resolve(true);
+          } else {
+            resolve(false)
+          }
+        }
+      }).catch((err: Error) => {
+        fail(err)
+      })
+    });
+  }
+
+  /**跳转设置页面*/
+  static openPermissionsInSystemSettings(context: Object): void {
+    let uiContext = getContext(context) as common.UIAbilityContext;
+    let wantInfo: Want = {
+      bundleName: 'com.huawei.hmos.settings',
+      abilityName: 'com.huawei.hmos.settings.MainAbility',
+      uri: 'application_info_entry',
+      parameters: {
+        pushParams: AppUtils.getPackageName(uiContext) // 打开指定应用的设置页面
+      }
+    }
+    uiContext.startAbility(wantInfo)
+  }
+
+  private static async checkAccessToken(permission: Permissions): Promise<abilityAccessCtrl.GrantStatus> {
+    let atManager: abilityAccessCtrl.AtManager = abilityAccessCtrl.createAtManager();
+    let grantStatus: abilityAccessCtrl.GrantStatus = abilityAccessCtrl.GrantStatus.PERMISSION_DENIED;
+
+    // 获取应用程序的accessTokenID
+    if (PermissionUtils.tokenId == 0) {
+      try {
+        let bundleInfo: bundleManager.BundleInfo = await bundleManager.getBundleInfoForSelf(bundleManager.BundleFlag.GET_BUNDLE_INFO_WITH_APPLICATION);
+        let appInfo: bundleManager.ApplicationInfo = bundleInfo.appInfo;
+        PermissionUtils.tokenId = appInfo.accessTokenId;
+      } catch (error) {
+        const err: BusinessError = error as BusinessError;
+      }
+    }
+    // 校验应用是否被授予权限
+    try {
+      grantStatus = await atManager.checkAccessToken(PermissionUtils.tokenId, permission);
+    } catch (error) {
+      const err: BusinessError = error as BusinessError;
+    }
+
+    return grantStatus;
+  }
+
+}
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