将原始文件复制到SDCard？

Question

我的文件res/raw夹里有一些音频文件.出于某些原因,我想将这些文件复制到我的SDCard当我的应用程序启动时.

我怎么能这样做？有人指导我吗？

Answer 1

从资源中读取,写入SD卡上的文件:

InputStream in = getResources().openRawResource(R.raw.myresource);
FileOutputStream out = new FileOutputStream(somePathOnSdCard);
byte[] buff = new byte[1024];
int read = 0;

try {
   while ((read = in.read(buff)) > 0) {
      out.write(buff, 0, read);
   }
} finally {
     in.close();
     out.close();
}

Answer 2

将文件从原始文件复制到外部存储：

这是我用来完成这项工作的方法，此方法接收资源 ID 和存储所需的名称，例如：

copyFiletoExternalStorage(R.raw.mysound, "jorgesys_sound.mp3");

方法：

private void copyFiletoExternalStorage(int resourceId, String resourceName){
    String pathSDCard = Environment.getExternalStorageDirectory() + "/Android/data/" + resourceName;
    try{
        InputStream in = getResources().openRawResource(resourceId);
        FileOutputStream out = null;
        out = new FileOutputStream(pathSDCard);
        byte[] buff = new byte[1024];
        int read = 0;
        try {
            while ((read = in.read(buff)) > 0) {
                out.write(buff, 0, read);
            }
        } finally {
            in.close();
            out.close();
        }
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

}