使用specified启动模式定制入口

import common from '@ohos.app.ability.common' 
import Want from '@ohos.app.ability.Want'; 
import { BusinessError } from '@ohos.base'; 
  
@Entry 
@Component 
struct Index { 
   
  getInstance(instance: String){ 
    return 'testKey' + instance; 
  } 
  
  redirectAbility(key: String){ 
    let context = getContext(this) as common.UIAbilityContext 
  
    let want: Want = { 
      deviceId: '', 
      bundleName: 'com.example.customizedpagedemo', 
      abilityName: 'SpecifiedAbility', 
      parameters: { 
        target: 'pages/specifiedAbility/SpecifiedDetail', 
        instanceKey: key, 
      }, 
    } 
  
    context.startAbility(want).then(() => { 
      console.info('startAbility succeeded') 
    }).catch((err: BusinessError) => { 
      console.error(`Failed to start ability. Code is ${err.code}, message is ${err.message}`); 
    }) 
  } 
  
  build() { 
    Row() { 
      Column() { 
        Text('EntryAbility') 
          .fontSize(50) 
          .fontWeight(FontWeight.Bold) 
        Button('新建一个文档') 
          .backgroundColor(Color.Green) 
          .width(180) 
          .margin({top: 20}) 
          .onClick(() => { 
            this.redirectAbility(this.getInstance('new')); 
          }) 
        Button('打开已保存的文档') 
          .backgroundColor(Color.Green) 
          .width(180) 
          .margin({top: 20}) 
          .onClick(() => { 
            this.redirectAbility(this.getInstance('old')); 
          }) 
      } 
      .width('100%') 
    } 
    .height('100%') 
  } 
}

import AbilityStage from '@ohos.app.ability.AbilityStage'; 
import Want from '@ohos.app.ability.Want'; 
import hilog from '@ohos.hilog'; 
  
export default class MyAbilityStage extends AbilityStage{ 
  
  onAcceptWant(want: Want): string { 
    hilog.info(0x0000, 'testTag', '%{public}s', 'MyAbilityStage onAcceptWant', JSON.stringify(want) ?? ''); 
    if(want && want.abilityName === 'SpecifiedAbility'){ 
      if(want.parameters.instanceKey){ 
        return `SpecifiedAbilityInstance${want.parameters.instanceKey}`; 
      } 
    } 
    return ''; 
  } 
}