在Java中多段执行adb或者shell的命令

public void Bale (String logname){ //ant打包
		System.out.println("-----------正在执行ant编译-----------");
		execmd("cmd /c cd /d "+sdktoolspath+ " & android create uitest-project -n "+project+" -t 1 -p"+"  \""+workspace_path+"\"",logname);
		execmd("cmd /c "+sdkpath+"  & "+" cd /d "+"\""+workspace_path+"\"" +" & "+ "ant build",logname );
		
	}

//在每个命令间隔中间添加 & 就行