2

我正在尝试从资产复制到 sdcard 这是我的代码的一部分

private void CopyAssets(String folder) {

        File folders = new File(Environment.getExternalStorageDirectory().toString()+"/beatscache/"+folder);
        folders.mkdirs();
        AssetManager assetManager = getAssets();
        String[] files = null;
                try {
            files = assetManager.list(folder);
        } catch (IOException e) {
            Log.e("tag", e.getMessage());
        }

        for(String filename : files) {
            InputStream in = null;
            OutputStream out = null;
            try {
              in = assetManager.open(folder+"/"+filename);   // if files resides inside the "Files" directory itself
              out = new FileOutputStream(Environment.getExternalStorageDirectory().toString()+"/"+"beatscache"+"/"+folder +"/" + filename);
              copyFile(in, out);
              in.close();
              in = null;
              out.flush();
              out.close();
              out = null;
            } catch(Exception e) {
                Log.e("tag", e.getMessage());
            }
        }
    }
    private void copyFile(InputStream in, OutputStream out) throws IOException {
        byte[] buffer = new byte[1024];
        int read;
        while((read = in.read(buffer)) != -1){
          out.write(buffer, 0, read);
        }
    }

和

CopyAssets("bin");

日志显示

E/tag（3801）：/mnt/sdcard/beatscache/bin/alsa_ctl：打开失败：ENOENT（没有这样的文件或目录）

我在 AndroidManifest.xml 中授予了 READ 和 WRITE 权限，并检查了 Environment.MEDIA_MOUNTED.equals(state) 返回 true。

并且文件夹没有被创建。

你能告诉我哪里做错了吗？

4

1 回答 1

2

首先检查文件是否存在，然后将您的内容移到那里

final File dir = new File(cEnvironment.getExternalStorageDirectory()+"/beatscache/"+folder +"/");
if(dir.exists()==false)
{
dir.mkdirs(); //create folders where write files
final File file = new File(dir, filename);
}
于 2013-01-23T12:44:15.283 回答