现在正在开发一个项目,我需要在 sdcard 中创建一个可以执行的文件夹。我还需要根据需要隐藏/取消隐藏它。代码在模拟器上运行良好,但在设备上运行不正常这是我的代码出了什么问题?
public class FolderCreate extends MIDlet {
private Form form;
private Display display;
FileConnection fc;
String path;
public void startApp() {
form = new Form("Hello World");
String msg = "Hello World!!!!!!!";
form.append(msg);
display = Display.getDisplay(this);
display.setCurrent(form);
System.out.println("WWWW");
try {
path = System.getProperty("fileconn.dir.memorycard");
System.out.println("Path : "+path+"/sample");
fc = (FileConnection)Connector.open(path+"/ABCD/");
if(!fc.exists())
{
fc.mkdir();
System.out.println("directory created");
}
} catch (IOException e) {
// TODO Auto-generated catch block
//System.out.println("ERROR "+e.getMessage());
Alert alert = new Alert("Alert");
alert.setString(e.getMessage());
display.setCurrent(alert);
}
try
{
//fc = (FileConnection)Connector.open(path+"/sample/");
if(fc.isHidden())
{
fc.setHidden(false);
}
else{
fc.setHidden(true);
}
fc.close();
}
catch (Exception e)
{
Alert alert = new Alert("Alert2");
alert.setString(e.toString());
display.setCurrent(alert);
}
}
public void pauseApp() {
}
public void destroyApp(boolean unconditional) {
System.out.println("Destroyed");
notifyDestroyed();
}
}
我得到的错误是java.io.IOException
::文件不存在