在一行中保存音频文件或者把 assets 文件夹保存到 sdcard 中

Question

在 assets 文件夹中有一个 audio 文件，我需要把相同的文件保存到 sdcard 中，如何实现？我用下面的代码来保存文件：

String filename = "filename.txt";
File file = new File(Environment.getExternalStorageDirectory(), filename);
FileOutputStream fos;
byte[] data = new String("data to write to file").getBytes();
try {
    fos = new FileOutputStream(file);
    fos.write(data);
    fos.flush();
    fos.close();
} catch (FileNotFoundException e) {
    // handle exception
} catch (IOException e) {
    // handle exception
}

Answer 1

使用下面的代码试试：

AssetManager mngr = getAssets();
InputStream path = mngr.open("music/music1.mp3"); 

                    BufferedInputStream bis = new BufferedInputStream(path,1024);

                    //get the bytes one by one
                    int current = 0;

                    while ((current = bis.read()) != -1) {

                        baf.append((byte) current);
                    }
}
byte[] bitmapdata  = baf.toByteArray();

转换为 byte 数组后，把下面的代码放到 sdcard 中

File file = new File(Environment.getExternalStorageDirectory(), music1.mp3);
FileOutputStream fos;

try {
    fos = new FileOutputStream(file);
    fos.write(bitmapdata  );
    fos.flush();
    fos.close();
} catch (FileNotFoundException e) {
    // handle exception
} catch (IOException e) {
    // handle exception
}