Android写入SD卡文件夹

  • Z时代
  • 2024-01-10
  • 分类：问答

我正在使用以下代码从服务器下载文件，然后将其写入sd卡的根目录，一切正常：

package com.downloader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import android.os.Environment;
import android.util.Log;
public class Downloader {
    public void DownloadFile(String fileURL, String fileName) {
        try {
            File root = Environment.getExternalStorageDirectory();
            URL u = new URL(fileURL);
            HttpURLConnection c = (HttpURLConnection) u.openConnection();
            c.setRequestMethod("GET");
            c.setDoOutput(true);
            c.connect();
            FileOutputStream f = new FileOutputStream(new File(root, fileName));
            InputStream in = c.getInputStream();
            byte[] buffer = new byte[1024];
            int len1 = 0;
            while ((len1 = in.read(buffer)) > 0) {
                f.write(buffer, 0, len1);
            }
            f.close();
        } catch (Exception e) {
            Log.d("Downloader", e.getMessage());
        }
    }
}

但是，using Environment.getExternalStorageDirectory();表示文件将始终写入root /mnt/sdcard。是否可以指定某个文件夹来写入文件？

例如： /mnt/sdcard/myapp/downloads

回答：

File sdCard = Environment.getExternalStorageDirectory();
File dir = new File (sdCard.getAbsolutePath() + "/dir1/dir2");
dir.mkdirs();
File file = new File(dir, "filename");
FileOutputStream f = new FileOutputStream(file);
...

以上是 Android写入SD卡文件夹 的全部内容， 来源链接： utcz.com/qa/410413.html

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