AsyncTask的OnPostExecute没有更新的TextView [英] AsyncTask OnPostExecute not updating TextView
问题描述
我有一个的AsyncTask
运行。我有一个的TextView
,我模仿的消息吐司
开始生产。
我想清楚了的TextView
成功后在 OnPostExecute
但它没有这样做。任务完成吐司
工作正常。如何设置了的TextView
在 OnPostExecute
来空白?该用户仍然在显示屏幕上,其中的TextView
是
code是如下的错误条件:
@覆盖
保护无效onPostExecute(虚空结果)
{FetchingImage = 0;
如果(webLoadError大于0)
{
TextView的文字=(TextView的)findViewById(R.id.textView2);
字符串TEMP =;
text.setText(临时);
Toast.makeText(getApplicationContext(),图像无法从互联网\ n默认或最后一个影像装\ n请再次稍后。Toast.LENGTH_LONG).show();
}
}
试着这么做:
((TextView中)findViewById(R.id.textView2))的setText()。
编辑:
尽量使的onCreate
如 TextView的文本之外的变量;
,然后在的onCreate
放:文本=(TextView的)findViewById(R.id.textView2);
然后只是把 text.setText();
的 onPostExecute
法里面
其是否正常工作。
I have an AsyncTask
running. I have a TextView
that I mimic the message a Toast
initially produces.
I want to clear the TextView
upon success in OnPostExecute
but it not doing so. The task complete Toast
works fine. How do I set the TextView
in the OnPostExecute
to blank? The user is still on the display screen where the TextView
is.
Code is as follows for an error condition:
@Override
protected void onPostExecute(Void result)
{ FetchingImage=0;
if(webLoadError>0)
{
TextView text = (TextView) findViewById(R.id.textView2);
String temp=" ";
text.setText(temp);
Toast.makeText(getApplicationContext(), "Image not available from the internet.\nDefault or last image loaded.\nTry again later.",Toast.LENGTH_LONG).show();
}
}
Try something like:
((TextView) findViewById(R.id.textView2)).setText("");
EDIT:
try making a variable outside the onCreate
like TextView text;
and then inside the onCreate
put: text = (TextView) findViewById(R.id.textView2);
and then just put text.setText("");
inside the onPostExecute
method.
See if that works.
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