onPostExecute not allowing me to create Toast message

Question

Please see this before for context: Anonymous Uploading File object to Imgur API (JSON) gives Authentication Error 401 (it has the code for doInBackground() method in case anyone is interested)

Using an AsyncTask class, I am uploading an image to Imgur. The uploading process is done within doInBackground() method. It returns String link to onPostExecute which should display the link in the form of a Toast message.

@Override
protected void onPostExecute(String result) 
{
    super.onPostExecute(result);
    Toast.makeText(getApplicationContext(), "Uploaded! Link: " + result, Toast.LENGTH_SHORT).show();
}

However, doing this gives the following error:

The method getApplicationContext() is undefined for the type UploadToImgurTask

Trying to copy the return string to the clipboard gives a similar issue.

@Override
protected void onPostExecute(String result) 
{
    super.onPostExecute(result);
    ClipboardManager clipboard = (ClipboardManager)getSystemService(Context.CLIPBOARD_SERVICE); 
    ClipData clip = ClipData.newPlainText("label", "Text to copy");
    clipboard.setPrimaryClip(clip);
}

The method getSystemService(String) is undefined for the type UploadToImgurTask

use a activity context in place of getApplicationContext(). if asynctask is not a inner class of the activity pass the context to the constructor of the asynctask. use the context to display toast — Raghunandan, May 23 '13 at 20:23

score 5 · Accepted Answer · answered May 23 '13 at 20:38

5

@Raghunandan is right. So, inside your UploadToImgurTask class you can have:

private Context context;
//in constructor:
public UploadToImgurTask(Context context){
        this.context=context;
}

Then in onPostExecute you can simply use:

Toast.makeText(context, "Uploaded! Link: " + result, Toast.LENGTH_SHORT).show();

Hope this helps you.

answered May 23 '13 at 20:38

Shobhit Puri

25,769
11
95
124

It worked beautifully! Thanks to both of you. One more question: my code for copying the link to the system clipboard isn't working from onPostExecute. Keeps saying getSystemService is undefined for UploadToImgurTask. :( – Awais Imran May 25 '13 at 09:04
Again getSystemService() is a Context method, so you need a reference to context object. you can try using `context.getSystemService()`. Hope this works. – Shobhit Puri May 25 '13 at 20:29

score 1 · Answer 2 · answered May 23 '13 at 21:19

1

In place of getApplicationContext(), use AsyncTask's Parent class name with ".this" like MyActivity.this if it extends from Activity Otherwise use getActivity(). Hoping your problem will be solved with this

answered May 23 '13 at 21:19

user2281330

181
2
11

or simply extends Activity – Thamaraiselvam Feb 04 '15 at 08:03

score 0 · Answer 3 · answered Aug 05 '15 at 06:40

try this code

public static void pushprofList(Activity context){
 static Context = mConext;

protected void onPostExecute(String result) {

      Toast toast=Toast.makeText(mConext,"Succefully Updated Profile",Toast.LENGTH_LONG);
             toast.show();

    }
  }

this working completely and display toast message.

onPostExecute not allowing me to create Toast message

3 Answers3