android 1.5,通过编程将歌曲表单/sdcard/songs复制到/sdcard/backup

android 1.5,通过编程将歌曲表单/sdcard/songs复制到/sdcard/backup,android,backup,mp3,android-sdcard,Android,Backup,Mp3,Android Sdcard,我正在使用eclipse emulator,我想以编程方式将一些MP3从/sdcard/songs复制到/sdcard/backup,有什么办法吗? 非常感谢任何帮助和代码片段! 谢谢!:) 您可以尝试以下方法: try { File sd = Environment.getExternalStorageDirectory(); if (sd.canWrite()) { String sourcePath= "/path/to/source/file.mp3";

我正在使用eclipse emulator,我想以编程方式将一些MP3从/sdcard/songs复制到/sdcard/backup,有什么办法吗? 非常感谢任何帮助和代码片段! 谢谢!:)

您可以尝试以下方法:

try {
    File sd = Environment.getExternalStorageDirectory();

    if (sd.canWrite()) {
        String sourcePath= "/path/to/source/file.mp3";
        String destinationPath= "/path/to/destination/file.mp3";
        File source= new File(sd, sourcePath);
        File destination= new File(sd, destinationPath);
        if (source.exists()) {
            FileChannel src = new FileInputStream(source).getChannel();
            FileChannel dst = new FileOutputStream(destination).getChannel();
            dst.transferFrom(src, 0, src.size());
            src.close();
            dst.close();
        }
} catch (Exception e) {}