asynctask中的进度对话框变得越来越糟糕

我正在使用asynctask中的exlend在preexicute中调用progressdialog而在postexicure中我使用dismiss . 当我尝试运行应用程序时，应用程序保持收集 .

public class DownloadText extends AsyncTask<String,String,String> {

   TextView tv;
   ImageView home,guest;
   Context context;
   private ProgressDialog progressDialog;

    public DownloadText(TextView tv,Context context) {
        this.tv=tv;
        this.context=context;
    }

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        progressDialog=new ProgressDialog(context);
        progressDialog.setMessage("loading...");
        progressDialog.setCancelable(false);
        progressDialog.show();

    }

    @Override
    protected String doInBackground(String... strings) {
        try {
            Thread.sleep(2000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        Document document= null;
        Elements score;
        try {
            document = Jsoup.connect(strings[1]).get();

        } catch (IOException e) {
            e.printStackTrace();
        }
         score=document.select(strings[0]);


        return score.text();

    }


    @Override
    protected void onPostExecute(String s) {
        super.onPostExecute(s);
        tv.setText(s);
        progressDialog.dismiss();

    }

    @Override
    protected void onCancelled() {
        progressDialog.dismiss();
        super.onCancelled();
    }
}

E / WindowManager：android.view.WindowLeaked：Activity com.example.aviv.project1.SummeyAct泄露了窗口com.android.internal.policy.PhoneWindow $ DecorView {f838863 VE ..... R ...... D 0,0-1248,348}最初是在android.view.WindowManagerImpl的android.view.WindowManagerGlobal.addView（WindowManagerGlobal.java：309）的android.view.ViewRootImpl . （ViewRootImpl.java:469）中添加的 . 在Android.os.AsyncTask.executeOnExecutor的com.example.aviv.project1.DownloadText.onPreExecute（DownloadText.java:46）的android.app.Dialog.show（Dialog.java:328）中添加了View（WindowManagerImpl.java:85） （AsyncTask.java:604）位于android.os.Handler的com.example.aviv.project1.BoxScoreFragment $ 2 $ 1.run（BoxScoreFragment.java:107）的android.os.AsyncTask.execute（AsyncTask.java:551） . handleCallback（Handler.java:815）位于android.app.AooT.Thread.main上的android.os.Handler.dispatchMessage（Handler.java:104）android.os.Looper.loop（Looper.java:207）处于ActivityThread.java ：5811）at java.lang.reflect.Method.invoke（Native方法）com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:907）com.android.internal.os.ZygoteInit.main（ZygoteInit.java:768）