HarmonyOS系统利用AVPlayer开发视频播放功能

import media from '@';

this.avPlayer = await media.createAVPlayer();

// 示例：设置stateChange和error监听
this.avPlayer.on('stateChange', (state) => { /* 处理状态变化 */ });
this.avPlayer.on('error', (err) => { /* 错误处理 */ });

// 使用本地资源
let fdPath = 'fd://';
let file = await fs.open(pathToVideoFile);
fdPath += file.fd;
this.avPlayer.url = fdPath;

// 或使用网络资源（确保已申请网络权限）
this.avPlayer.url = 'http://example.com/video.mp4';

// 假设this.surfaceID已经从XComponent获取
this.avPlayer.surfaceId = this.surfaceID;

await this.avPlayer.prepare();

this.avPlayer.play();
this.avPlayer.pause();
this.avPlayer.seek(100); // 跳转到100秒处
this.avPlayer.stop();

this.avPlayer.reset(); // 重置资源，以便更换播放文件
this.avPlayer.release(); // 释放资源，退出播放

// 导入所需模块
import media from '@';
import fs from '@ohos.file.fs';
import common from '@ohos.app.ability.common';

export class AVPlayerDemo {
  private avPlayer;
  private surfaceID; // 需要从UI组件获取

  constructor() {
    this.initPlayer();
  }

  async initPlayer() {
    this.avPlayer = await media.createAVPlayer();
    this.setupEventListeners();

    // 假定此路径指向一个有效的视频文件
    let pathToVideoFile = '/path/to/your/video.mp4';
    let file = await fs.open(pathToVideoFile);
    let fdPath = 'fd://' + file.fd;
    this.avPlayer.url = fdPath;

    this.surfaceID = this.getSurfaceIDFromUIComponent(); // 实现此方法以获取SurfaceID
    this.avPlayer.surfaceId = this.surfaceID;

    try {
      await this.avPlayer.prepare();
      this.avPlayer.play();
    } catch (err) {
      console.error('Error during preparation or playback:', err);
    }
  }

  setupEventListeners() {
    // 省略具体实现，参照上述代码段设置监听事件
  }

  // 获取SurfaceID的方法需自行实现
  getSurfaceIDFromUIComponent() {
    // ...
  }
}