可以使用cordova-plugin-file。

const blob = new Blob([resp.data], { type: resp.headers('Content-Type') });
const pathToFile = cordova.file.dataDirectory;
const fileName = 'file';

document.addEventListener('deviceready', async () => {
  try {
    const fileSystem = await new Promise((resolve, reject) => {
      window.resolveLocalFileSystemURL(pathToFile, resolve, reject);
    });

    const fileEntry = await new Promise((resolve, reject) => {
      fileSystem.getFile(fileName, { create: true, exclusive: false }, resolve, reject);
    });

    const fileWriter = await new Promise((resolve, reject) => {
      fileEntry.createWriter(resolve, reject);
    });

    fileWriter.onwriteend = () => {
      console.log('File saved successfully:', fileEntry.nativeURL);
    };

    fileWriter.onerror = (error) => {
      console.error('Error writing file:', error);
    };

    fileWriter.write(blob);
  } catch (error) {
    console.error('Error:', error);
  }
}, false);

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