短视频切换案例

async Init(): Promise<void> {
  await this.release();
  const context = getContext(this);
  // 获取fdSrc用于注册AVPlayer
  context.resourceManager.getRawFd(this.fileName).then(async (value: resourceManager.RawFileDescriptor) => {
    this.avPlayer = await media.createAVPlayer();
    this.isCreate = true;
    this.setSourceInfo(); // 视频信息上报函数
    this.setStateChangeCallback(); // 状态机上报回调函数
    this.avPlayer.fdSrc = {
      fd: value.fd,
      offset: value.offset,
      length: value.length
    };
  });
}

// TODO 知识点：XComponent和AVPlayer通过surfaceId绑定
setSurfaceID(): void {
  logger.info('play video: surfaceID is:' + this.surfaceID);
  this.avPlayer.surfaceId = this.surfaceID;
}

  case 'prepared':
    logger.info('state prepared called');
    this.isPlaying = true; // 准备完成阶段 开始播放
    this.totalDuration = this.avPlayer.duration; // 获取视频时长
    this.aspect_ratio = this.avPlayer.width / this.avPlayer.height; // 获取视频宽高比
    if(this.avPlayer.width >= this.avPlayer.height) { // 判断是横屏视频还是竖屏视频
      this.verticalVideo = false;
    } else {
      this.verticalVideo = true;
    }
    this.getPlay();
    break;

changeOrientation() {
  // 获取UIAbility实例的上下文信息
  let context = getContext(this);
  // 调用该接口手动改变设备横竖屏状态（设置全屏模式，先强制横屏，再加上传感器模式）
  window.getLastWindow(context).then((lastWindow) => {
    if (this.isLandscape) {
      // 设置窗口的布局是否为沉浸式布局
      lastWindow.setWindowLayoutFullScreen(true, () => {
        // 设置窗口全屏模式时导航栏、状态栏的可见模式
        lastWindow.setWindowSystemBarEnable([]);
        // 设置窗口的显示方向属性，AUTO_ROTATION_LANDSCAPE表示传感器自动横向旋转模式
        lastWindow.setPreferredOrientation(window.Orientation.AUTO_ROTATION_LANDSCAPE);
      });
    } else {
      // 设置窗口的显示方向属性，UNSPECIFIED表示未定义方向模式，由系统判定
      lastWindow.setPreferredOrientation(window.Orientation.UNSPECIFIED, () => {
        // 设置窗口全屏模式时导航栏、状态栏的可见模式
        lastWindow.setWindowSystemBarEnable(WINDOW_SYSTEM_BAR, () => {
          // 设置窗口的布局是否为沉浸式布局
          lastWindow.setWindowLayoutFullScreen(false, () => {
            setTimeout(() => {
              // 设置退出全屏动画
              animateTo({
                duration: ANIMATE_DURATION,
                onFinish: () => {
                  this.fileName = '';
                }
              }, () => {
                this.isFullScreen = !this.isFullScreen;
              });
            }, TIMEOUT_DURATION);
          });
        });
      });
    }
  });
}

Row() {
  // ...
  Slider({
    value: Math.round(this.currentTime / this.totalDuration * 100)
  })
    .onChange((value: number, mode: SliderChangeMode) => {
      if (this.isCreate) {
        this.currentTime = this.totalDuration * value / 100;
        this.avPlayer.seek(this.currentTime);
        if (mode === SliderChangeMode.Moving) {
          if (this.avPlayer.state === 'playing') {
            this.getPause();
          }
        } else if (mode === SliderChangeMode.End) {
          if (this.avPlayer.state === 'paused' && this.isPlaying) {
            this.getPlay();
          }
        }
      }
    })
  // ...
}
.hitTestBehavior(HitTestMode.Transparent) // 将组件的触摸测试类型设置为自身和子节点都响应触摸测试，不会阻塞兄弟节点的触摸测试，不会影响祖先节点的触摸测试。
.responseRegion( // 设置多个触摸热区
  [
    {
      x: 0,
      y: 0,
      width: $r('app.string.video_screen_direction_switching_layout_100'),
      height: $r('app.string.video_screen_direction_switching_layout_100')
    },
    {
      x: 0,
      y: $r('app.string.video_screen_direction_switching_layout_negative_200'),
      width: $r('app.string.video_screen_direction_switching_layout_100'),
      height: $r('app.string.video_screen_direction_switching_layout_200')
    }
  ]
)
.gesture( // 设置拖动手势，将距离变量与进度条变量进行绑定计算
  PanGesture(new PanGestureOptions({
    direction: PanDirection.Left | PanDirection.Right
  }))
    .onActionStart(() => {
      this.flagValue = this.currentTime;
    })
    .onActionUpdate((event?: GestureEvent) => {
      if (event) {
        if (this.isCreate) {
          if (this.avPlayer.state === 'playing') {
            this.getPause();
          }
          this.currentTime =  (this.flagValue + this.totalDuration * (event.offsetX / 3) / 100) > this.totalDuration ? this.totalDuration : (this.flagValue + this.totalDuration * (event.offsetX / 3) / 100);
        }
      }
    })
    .onActionEnd(() => {
      if (this.isCreate) {
        this.avPlayer.seek(this.currentTime);
        if (this.avPlayer.state === 'paused' && this.isPlaying) {
          this.getPlay();
        }
      }
    })
)

VideoSwitching                                     // hap
|---component
|   |---VideoComponent.ets                         // AVPlayer组件页面
|---model                                         
|   |---BasicDataSource.ets                        // 数据类型文件
|---pages
|   |---Index.ets                                  // 入口文件
|---util
|   |---TimeTools.ets                              // 时间轴组件页面
|---view
|   |---VideoScreenDirectionSwitching.ets          // 视频横竖屏切换容器页面

git init
git config core.sparsecheckout true
echo /code/BasicFeature/Media/VideoSwitching/ > .git/info/sparse-checkout
git remote add origin https://gitee.com/openharmony/applications_app_samples.git
git pull origin master