尝试从资产文件夹复制文件时发生错误 [英] An error when trying to copy a file from the assets folder

问题描述

我正在尝试将文件从资产文件夹复制到外部存储，这是我的代码:

I am trying to copy a file from assets folder to external storage, this is the code I have:

File f=new File(Environment.getExternalStorageDirectory(), "imgs/" + str2);
        if (!f.exists()) {
            try {
                InputStream ins = getApplicationContext().getAssets().open("imgs/" + str2);
                FileOutputStream out=new FileOutputStream(f);
                byte[] buf=new byte[1024];
                int len;
                while ((len=ins.read(buf)) > 0) {
                    out.write(buf, 0, len);
                }
                ins.close();
                out.close();
            }
            catch (IOException e) {
                Log.e("FileProvider", "Exception copying from assets", e);
            }
        }

但是我得到的错误是: java.io.FileNotFoundException: /storage/emulated/0/imgs/pic_name.jpg (No such file or directory)

but the error I get is: java.io.FileNotFoundException: /storage/emulated/0/imgs/pic_name.jpg (No such file or directory)

但是，我正在创建此文件，所以我不知道为什么它说找不到该文件.

But, I am creating this file so I have no idea why it says that it's not found.

推荐答案

因为"img"目录不存在，必须创建目录

because "img" directory is not exists you must create the directory

代码:

   String rootPath=Environment.getExternalStorageDirectory().getAbsolutePath()+"/imgs/";
        File file=new File(rootPath);
      if(!file.exists()){
         file.mkdirs();
       }

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