鸿蒙(HarmonyOS)应用开发—

鸿蒙(HarmonyOS)应用开发—— video组件实操

news2024/12/26 10:59:28

video 组件

harmonyOS 系统提供了基础的video。下面就直接上代码

原始video

新建项目 customVideo项目

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本地视频

网络地址，就不用说明，只需要把地址换成网络地址即可
在resource 文件夹下的rawfile文件夹下添加视频
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在index.ets

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  Video({src:$rawfile("videoTest.mp4")})
        .height("30%")

呈现的效果

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新闻类/课程类视频

引入背景图片

在resource 文件下的base——media 中添加进背景图
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添加背景图属性

    Column(){
      Flex() {
        Video({src:$rawfile("videoTest.mp4"),previewUri:$r('app.media.preview')})
          .height("30%")


      }
      Flex(){
        Text("sss")
      }
    }

呈现效果

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自定义播放栏

新建VideoSlider.ets

@Component
export struct VideoSlider {
  @Consume isOpacity: boolean;
  private controller: VideoController = new VideoController();
  @Consume currentStringTime: string;
  @Consume currentTime: number;
  @Consume durationTime: number;
  @Consume durationStringTime: string;
  @Consume isPlay: boolean;
  @Consume flag: boolean;
  @Consume isLoading: boolean;
  @Consume progressVal: number;

  build() {
    Row({ space: MARGIN_FONT_SIZE.FIRST_MARGIN }) {
      Image(this.isPlay ? $r('app.media.ic_pause') : $r('app.media.ic_play'))
        .width(IMAGE_SIZE)
        .height(IMAGE_SIZE)
        .margin({ left: MARGIN_FONT_SIZE.FIRST_MARGIN })
        .onClick(() => {
          this.iconOnclick();
        })
      Text(this.currentStringTime)
        .fontSize(MARGIN_FONT_SIZE.SECOND_MARGIN)
        .fontColor(Color.White)
        .margin({ left: MARGIN_FONT_SIZE.FIRST_MARGIN })
      Slider({
        value: this.currentTime,
        min: 0,
        max: this.durationTime,
        step: 1,
        style: SliderStyle.OutSet
      })
        .blockColor($r('app.color.white'))
        .width(STRING_PERCENT.SLIDER_WITH)
        .trackColor(Color.Gray)
        .selectedColor($r("app.color.white"))
        .showSteps(true)
        .showTips(true)
        .trackThickness(this.isOpacity ? SMALL_TRACK_THICK_NESS : BIG_TRACK_THICK_NESS)
        .onChange((value: number, mode: SliderChangeMode) => {
          this.sliderOnchange(value, mode);
        })
      Text(this.durationStringTime)
        .fontSize(MARGIN_FONT_SIZE.SECOND_MARGIN)
        .margin({ right: MARGIN_FONT_SIZE.FIRST_MARGIN })
        .fontColor(Color.White)
    }
    .opacity(this.isOpacity ? DEFAULT_OPACITY : 1)
    .width(ALL_PERCENT)
    .alignItems(VerticalAlign.Center)
    .justifyContent(FlexAlign.Center)
  }

  /**
   * icon onclick callback
   */
  iconOnclick() {
    if (this.isPlay === true) {
      this.controller.pause()
      this.isPlay = false;
      this.isOpacity = false;
      return;
    }
    if (this.flag === true) {
      this.controller.start();
      this.isPlay = true;
      this.isOpacity = true;
    } else {
      this.isLoading = true;
      // The video loading is not complete. The loading action is displayed.
      let intervalLoading = setInterval(() => {
        if (this.progressVal >= STACK_STYLE.PROGRESS_TOTAL) {
          this.progressVal = 0;
        } else {
          this.progressVal += STACK_STYLE.PROGRESS_STEP;
        }
      }, STACK_STYLE.MILLI_SECONDS)
      // The scheduled task determines whether the video loading is complete.
      let intervalFlag = setInterval(() => {
        if (this.flag === true) {
          this.controller.start();
          this.isPlay = true;
          this.isOpacity = true;
          this.isLoading = false;
          clearInterval(intervalFlag);
          clearInterval(intervalLoading);
        }
      }, STACK_STYLE.MILLI_SECONDS);
    }
  }

  /**
   * video slider component onchange callback
   */
  sliderOnchange(value: number, mode: SliderChangeMode) {
    this.currentTime = Number.parseInt(value.toString());
    this.controller.setCurrentTime(Number.parseInt(value.toString()), SeekMode.Accurate);
    if (mode === SliderChangeMode.Begin || mode === SliderChangeMode.Moving) {
      this.isOpacity = false;
    }
    if (mode === SliderChangeMode.End) {
      this.isOpacity = true;
    }
  }
}

 private controller : VideoController;

Flex() {
        Video({src:$rawfile("videoTest.mp4"),previewUri:$r('app.media.preview')})
          .height("30%")
          .controls(false)
        VideoSlider({ controller: this.controller })

      }