子线程下载/子线程并发下载的参考案例？

Question

如题：子线程下载/子线程并发下载的参考案例？

Answer 1

将context传入到子线程，然后调用request的接口

let filesDir = context.cacheDir;
request.downloadFile(context.getApplicationContext(), {
  url: 'https://fe-static.xxx.com/mp/red/bc446184a0c84aa785ea3cada920f6ac.zip',
  filePath: filesDir + '/bc446184a0c84aa785ea3cada920f6ac.zip',
  enableMetered:true
}).then((downloadTask: request.DownloadTask) => {
  let progresCallback = (receivedSize: number, totalSize: number) => {
    console.info("downloadddd1 receivedSize:" + receivedSize + " totalSize:" + totalSize);
  };
  let pauseCallback = () => {
    console.info('Downloadddd task pause.');
  };
  //开启回调
  downloadTask.on('progress', progresCallback);
  downloadTask.on('pause', pauseCallback);
  downloadTask.on('complete', () => {

    console.info('downloaddddTask1 complete,filesDir:'+filesDir + '/bc446184a0c84aa785ea3cada920f6ac.json');

  })
}).catch((err: BusinessError) => {
  console.error(`Invoke downloadTask failed, code is ${err.code}, message is ${err.message}`);
})