我有解决不了的问题...

I have a problem that I can't solve...

在我的活动，我实例化一个类是这样的：

In my Activity, I instantiate a class like this :

MapView类MapView类=（图形页面）findViewById（R.id.mapview）;结果MYMAP =新地图（图形页面，这一点）;

构造看起来像这样

public Map(MapView mapView, Context context) {
    this.context = context;
    this.mapView = mapView;
}

和我想要做的就是在这个类的一个过程来显示progressDialog，所以，在地图，我得到了

And what I want to do is to show a progressDialog during a process of this class, so, in Map, I got

private void showPath() {
    progressDialog = ProgressDialog.show(context, "Veuillez patienter", "Calcul de l'itinéraire en cours...", true, false);

    Thread thread = new Thread(this);
    thread.start();
}

当线程结束后，我

progressDialog.dismiss（）;

这个作品！但只有一次......如果我点击后退按钮，并重新打开我的活动，我得到了BadTokenException

This works ! But only one time... If I click on the back button, and re open my activity, I got a BadTokenException

05-06 23：27：15.941：ERROR / AndroidRuntime（1247）：android.view.WindowManager $ BadTokenException：无法添加窗口 - 令牌android.os.BinderProxy@44ecc8e8无效;是您的活动运行？

我trye​​d所有的解决方案，我发现，但没有人的作品......甚至用谁延伸AsyncTask的一类。

I've tryed all solutions I found, but no one works... Even use a class who extends AsyncTask.

感谢您的帮助。

推荐答案

至于什么错误信息告诉你，那是因为你试图说明在活动对话框但活动没有运行（已经做完了吗？）。所以你看一个对话框之前，您可能希望确保活动还未结束：

As what the error message told you, it's because you try to show a dialog in a Activity but the Activity is not running(have already been finished?). So before you show a dialog, you may want to make sure that the Activity is not finished:

public class MyActivity extends Activity {

    public void showDialog(Dialog dialog) {
        if (!isFinishing()) {
            // If activity is not finished, then show this dialog.
            dialog.show();
        }
    }

}