android 操作文件夹如果用java的io来操作速度非常慢，为了解决这个问题，得出如下方式，速度大大提升，分享给大家。代码如下：

public static void main(String [] args){

    String fromPath = "mnt/sdCard/xuanqu";

    String toPath = "mnt/sdCard/Android/data/com.test.cn/xuanqu";

    File f = new File(toPath);

    String command = "";

    if(f.exists()) {

    } else {

    command = "mv " + fromPath + " " + toPath;

    execCommand(command);

}

public boolean execCommand(String command){

    Process process = null;

    try{

        process = Runtime.getRuntime().exec(command);

        process.waitFor();

    } catch (Exception e) {

        return false;

    }

    return true;

}