AsyncTask 完成后无法关闭 ProgressDialog [英] Can't dismiss ProgressDialog after the AsyncTask complete
本文介绍了AsyncTask 完成后无法关闭 ProgressDialog的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
请帮忙,我无法在 AsyncTask 完成后关闭 ProgressDialog.我搜索了答案,但没有找到.当我使用 Thread 而不是 AsyncTask 时,此代码工作正常.有什么想法吗?
Please help, I can't dismiss ProgressDialog after AsyncTask complete. I searched for the answer but nothing found. This code works fine when I use Thread instead of AsyncTask. Have any ideas?
Context appContext;
ProgressDialog pd;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
appContext=this;
MyTask myTask=new MyTask();
myTask.execute();
}
class MyTask extends AsyncTask<Void, Void, Void>
{
@Override
protected void onPreExecute()
{
pd = ProgressDialog.show(appContext, "Wait..", "Loading data",
true, false);
pd.setCancelable(false);
super.onPreExecute();
}
@Override
protected Void doInBackground(Void... arg0)
{
//something
return null;
}
@Override
protected void onPostExecute(Void result)
{
if (pd!=null)
pd.dismiss();
super.onPostExecute(result);
}
}
推荐答案
private ProgressDialog progressDialog; // class variable
private void showProgressDialog(String title, String message)
{
progressDialog = new ProgressDialog(this);
progressDialog.setTitle(title); //title
progressDialog.setMessage(message); // message
progressDialog.setCancelable(false);
progressDialog.show();
}
onPreExecute()
protected void onPreExecute()
{
showProgressDialog("Please wait...", "Your message");
}
检查并关闭 onPostExecute() -
protected void onPostExecute()
{
if(progressDialog != null && progressDialog.isShowing())
{
progressDialog.dismiss();
}
}
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