what goes inside dialog constructor

Question

i know it should be context. what exactly is a context though. usually when i create a dialog in a class i do something like this:

final Dialog dialog = new Dialog(this);

but now i am trying to create a dialog in an AsyncTask<> therefore i cannot do the above cause AsyncTask isn't a context evidently. the AsyncTask is a class in itself, which is to say its not a subclass right now.

public class popTask extends AsyncTask<Void, Void, String> {

Context con =

@Override
protected void onPostExecute(String result) {
    // TODO Auto-generated method stub
    super.onPostExecute(result);

    final Dialog dialog = new Dialog(con);
    dialog.setContentView(R.layout.custom);
    dialog.setTitle("New & Hot advertise");

    // set the custom dialog components - text, image and button
    TextView text = (TextView) dialog.findViewById(R.id.text);
    text.setText("Android custom dialog example!");
    ImageView image = (ImageView) dialog.findViewById(R.id.image);
    image.setImageResource(R.drawable.yoda);

    Button dialogButton = (Button) dialog.findViewById(R.id.dialogButtonOK);
    // if button is clicked, close the custom dialog
    dialogButton.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            dialog.dismiss();
        }
    });

    dialog.show();
}


@Override
protected String doInBackground(Void... params) {
    // TODO Auto-generated method stub
    return null;
}



}

Arun George · Accepted Answer · 2012-06-12T15:40:23.990

0

The following are the two ways you can send your context from the activity where you are executing your AsyncTask:

popTask pTask = new popTask(mContext); //OR
pTask.execute(mContext);

In your popTask create a private variable where you can set your context.

In the first option you need to have a constructor for your class popTask where you are accepting a context.

For the second option if you are not passing anything meaningful to the function doInBackground() you can change the following line:

public class popTask extends AsyncTask<Object, Void, String>

protected Object doInBackground(Object... params) {
this.mContext = (Context) params[0];

}

you will receive the context object in the doInBackground() which you can set in the private Context variable of the popTask class and then access it in the doInBackground() function.

edited Jun 12 '12 at 15:40

answered Jun 12 '12 at 15:14

Arun George

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after creating the first option. – j l Jun 12 '12 at 15:26
i can execute by doing pTask.execute(); – j l Jun 12 '12 at 15:27
Yes I have included a OR which mean either of the two solution but not both at once. If you are using the first option then you can use `pTask.execute()`. Hope the answer was helpful. – Arun George Jun 12 '12 at 15:30

Vipul · Answer 2 · 2012-06-12T15:32:35.850

0

To add to Samir's Answer

Modify your code to have constructor which take context of calling class.

public class popTask extends AsyncTask<Void, Void, String> {

    private Context context;
    public popTask(Context context)
    {
        this.cotext=context;
    }

and then Dialog dialog = new Dialog(context);

In your calling activity call this Asynctask like this

new popTask(ActivityName.this).execute();

edited Jun 12 '12 at 15:32

answered Jun 12 '12 at 15:17

Vipul

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does seem to accept ActivityName.class but instead ActivityName.this. not sure about the diff.. just letting u know. thanks again for the help – j l Jun 12 '12 at 15:31
oh sorry...it should be ActivityName.this..I updated my answer.Also accept the answer so it will be helpful for others who are having similar issue. – Vipul Jun 12 '12 at 15:32
now there arent any compilation errors but the dialog just wont show up... perhaps i need to use runOnUiThread() somewhere? – j l Jun 12 '12 at 15:43

what goes inside dialog constructor

2 Answers2