onKeyEvent监听电源键无响应

@Entry
@Component
struct KeyClickTestPage {
  @State text: string = ''
  @State eventType: string = ''

  build() {
    Column() {
      Button('KeyEvent')
        .defaultFocus(true)
          // 给Button设置onKeyEvent事件
        .onKeyEvent((event?: KeyEvent) => {
          if(event){
            if (event.type === KeyType.Down) {
              this.eventType = 'Down' // 按钮 按下
            }
            if (event.type === KeyType.Up) {
              this.eventType = 'Up'// 按钮 抬起
            }
            // KEYCODE_VOLUME_UP	16	音量增加键
            // KEYCODE_VOLUME_DOWN	17	音量减小键
            // KEYCODE_POWER	18	电源键
            this.text = 'onKeyEvent KeyType:' + this.eventType + '\nkeyCode:' + event.keyCode + '\nkeyText:' + event.keyText + '\nintentionCode:' + event.intentionCode
          }
        })
        .onKeyPreIme((event:KeyEvent) => {
          this.text = 'onKeyPreIme KeyType:' + this.eventType + '\nkeyCode:' + event.keyCode + '\nkeyText:' + event.keyText + '\nintentionCode:' + event.intentionCode


          return false;
        })
      Text(this.text).padding(15)
    }.height(300).width('100%').padding(35)
  }
}