如何使用URL将二进制文件下载到Android设备？

import android.app.DownloadManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.Uri;
import android.os.Environment;

public class BinaryFileDownloader {
    private Context context;
    private DownloadManager downloadManager;
    private long downloadId;

    public BinaryFileDownloader(Context context) {
        this.context = context;
        downloadManager = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
    }

    public void downloadFile(String fileUrl, String fileName) {
        Uri uri = Uri.parse(fileUrl);

        DownloadManager.Request request = new DownloadManager.Request(uri);
        request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, fileName);
        request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);

        downloadId = downloadManager.enqueue(request);

        // 注册广播接收器，监听下载完成的通知
        context.registerReceiver(downloadCompleteReceiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
    }

    private BroadcastReceiver downloadCompleteReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            long id = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1);
            if (id == downloadId) {
                // 下载完成，执行相应的操作，例如显示通知或者打开文件
                // ...
            }
        }
    };
}

BinaryFileDownloader downloader = new BinaryFileDownloader(context);
downloader.downloadFile("https://example.com/file.bin", "file.bin");

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />