我无法在MP3

Question

我想将mp3文件复制到外部存储器，我可以通过whatsapp或类似的东西共享它。

我遇到了一些问题：

java.io.FileNotFoundException：/ storage / emulated / 0 / Music / Arno lacht。 （是目录）

我如何创建文件？我是编程sry的新手......

@覆盖     public void onRequestPermissionsResult（int requestCode，@ NonNull String [] permissions，@ NonNull int [] grantResults）{         super.onRequestPermissionsResult（requestCode，permissions，grantResults）;

    switch (requestCode){
        case MY_PERMISSIONS_REQUEST_WRITE_EXTERNALSTORAGE:{

            // If request is cancelled, the result arrays are empty.
            if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                // permission was granted, yay! Do the
                // contacts-related task you need to do.


                //  External Storage accessible?

                String state = Environment.getExternalStorageState();
                if (Environment.MEDIA_MOUNTED.equals(state)) {

                    try{

                        // Create path


                        File path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MUSIC) ;



                            File root = new File(path, "Sounds");

                            if(!root.exists()) {
                                // Create new directory

                                root.mkdirs();
                                Toast.makeText(getApplicationContext(), "Ordner wurde erstellt", Toast.LENGTH_SHORT).show();
                            }



                        // Make sure the music directory exists.



                        File file = new File(root, soundNamenArray.get(itemPosition) );

                        // Copy data from internal memory to external memory

                        InputStream is = getResources().openRawResource(soundId[itemPosition]);

                        FileOutputStream os = new FileOutputStream(file);

                        byte[] data = new byte[is.available()];

                        int length;

                        while (( length = is.read(data)) > 0){
                            os.write(data, 0, length);

                        }

                        is.close();
                        os.close();


                        Toast.makeText(getApplicationContext(), "Datei kopiert!", Toast.LENGTH_SHORT).show();



                        uri = Uri.fromFile(file);

                    }catch (IOException e){
                        e.printStackTrace();
                        Toast.makeText(getApplicationContext(), "Exception geworfen", Toast.LENGTH_SHORT).show();

                    }




                    // Intent zum verschicken Starten
                    teilenIntent = new Intent(Intent.ACTION_SEND);
                    teilenIntent.setType("audio/mp3");
                    teilenIntent.putExtra(Intent.EXTRA_STREAM, uri);
                    startActivity(Intent.createChooser(teilenIntent, "Sound teilen"));  


                }else {
                    Toast.makeText(getApplicationContext(), "Fehler", Toast.LENGTH_SHORT).show();
                }



            } else {

                // permission denied, boo! Disable the
                // functionality that depends on this permission.
            }
            return;
        }

        // other 'case' lines to check for other
        // permissions this app might request.



    }
}