批量安装APK，可是没解决APK名称为中文的问题

package studyjava;


import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import org.omg.SendingContext.RunTime;

public class install {
    public static void main(String[] args) throws Exception
    {   
        String dir="D:\downapp\";
        File f1=new File(dir);
        String[] apkname=f1.list();
        for(int i=0;i<apkname.length;i++)
        {   
            if(installapp(dir+apkname[i]))
                System.out.println(apkname[i]+"安装成功");
            else
                System.out.println(apkname[i]+"没安装成功，或已经安装");

        }
        

    }
    public static boolean installapp(String path) throws IOException, Exception
    {   
        String[] b=new String[1024];
        Process p=Runtime.getRuntime().exec("adb install "+path);
        Thread.sleep(4000);
        InputStream in=p.getInputStream();
        BufferedReader br=new BufferedReader(new InputStreamReader(in));
        String str;
        int i=0;
        while((str=br.readLine())!=null)
        {
            if(str.indexOf("Success")!=-1)
                i=1;
        }
        if(i==1)
            return true;
        else
            return false;
    }

}