概述

FA模型和Stage模型由于线程模型和进程模型的差异，部分接口仅在FA模型下才能使用，针对这部分接口在SDK的接口中有FAModelOnly的标记，用于提醒开发者这部分接口仅能在FA模型下使用。因此在切换到Stage模型时，需要将应用中用到的FAModelOnly接口替换成Stage模型下对应的接口。下面是startAbility的接口切换示例，全量接口列表请查看后续章节：

startAbility接口由FA模型切换到Stage模型的示例：

• FA模型示例

import featureAbility from '@ohos.ability.featureAbility';
import Want from '@ohos.app.ability.Want';
import Logger from '../../utils/Logger';

const TAG: string = 'PagePageAbilityFirst';

@Entry
@Component
struct Index {
  
  build() {
    // ...
    Button() {
      // ...
    }
    .onClick(async () => {
      try {
        Logger.info(TAG, 'Begin to start ability');
        let want: Want = {
          bundleName: 'com.samples.famodelabilitydevelop',
          moduleName: 'entry',
          abilityName: 'com.samples.famodelabilitydevelop.PageAbilitySingleton'
        };
        await featureAbility.startAbility({ want: want });
        Logger.info(TAG, `Start ability succeed`);
      }
      catch (error) {
        Logger.error(TAG, 'Start ability failed with ' + error);
      }
    })
  }
}

• Stage示例示例

import Want from '@ohos.app.ability.Want';
import common from '@ohos.app.ability.common';
import { BusinessError } from '@ohos.base';

@Entry
@Component
struct Index {
  private context = getContext(this) as common.UIAbilityContext;

  build() {
    // ...
    Button() {
      // ...
    }
    .onClick(() => {
      // context为Ability对象的成员，在非Ability对象内部调用需要
      // 将Context对象传递过去
      let wantInfo: Want = {
        bundleName: "com.example.myapplication",
        abilityName: "EntryAbility"
      };
      this.context.startAbility(wantInfo).then(() => {
        console.info('startAbility success.');
      }).catch((error: BusinessError) => {
        console.error('startAbility failed.');
      })
    })
  }
}

Context接口切换

Context接口切换