CODEWITHSUNDEEP
javaandroidandroid-asynctask
Hussain Eid
Hussain Eid

Reputation: 1

how to stop asyncTask android

In my android project I use many AsynTask in one activity. I need to stop one AsynTask when I start other.

I'm using myAsynTask.cancel(true); in my android project. But it does stop the AsynTask. 

protected String doInBackground(String... args) {

        HashMap<String, String> params = new HashMap<>();
        params.put("id", args[0]);

        Log.d("get value: ", params.toString());

        JSONObject json = jParser.makeHttpRequest(url_comment, "GET", params);

        Log.d("All matches: ", json.toString());

        if(isCancelled()) {
            finish();
        }
        else {

            try {

                int success = json.getInt(TAG_SUCCESS);
                if (success == 1) {

                    JSONmatches = json.getJSONArray(TAG_vedio);

                    for (int i = 0; i < JSONmatches.length(); i++) {
                        JSONObject c = JSONmatches.getJSONObject(i);

                        String title = c.getString(TAG_title);
                        String url = c.getString(TAG_url);

                        HashMap<String, String> map = new HashMap<String, String>();

                        map.put(TAG_title, title);
                        map.put(TAG_url, url);

                        arrayList22.add(map);
                    }
                }
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }
        return null;
    }

Upvotes: 0

Views: 62

Answers (2)

Ravi Theja
Ravi Theja

Reputation: 3401

From the official Android documentation:

A task can be cancelled at any time by invoking cancel(boolean). Invoking this method will cause subsequent calls to isCancelled() to return true. After invoking this method, onCancelled(Object), instead of onPostExecute(Object) will be invoked after doInBackground(Object[]) returns. To ensure that a task is cancelled as quickly as possible, you should always check the return value of isCancelled() periodically from doInBackground(Object[]), if possible (inside a loop for instance.)

Upvotes: 1

F43nd1r
F43nd1r

Reputation: 7759

You actively have to check for isCancelled while executing your loop in doInBackground.

You should break the loop if isCanceled is true.

Upvotes: 1

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