Reset Android Activity

Question

I have an activity in android application and from that I am calling a method of an AsyncTask class which is calling a webservice. I want to reset/reload my activity on the basis of the result i get from that method. How can I reset my activity from that class?

Why would you want to reCreate activity? why not just simply set the data came from service — Abdul Kawee, May 02 '17 at 07:55
You may use `EventBus` to update the activity thread after `AsyncTask` finished. — Zarul Izham, May 02 '17 at 07:57
Service just post data and returns 0/1 . I dont have access of controls to set data in that class. — Mohammad Rashid, May 02 '17 at 07:58
on the basis of returns 0/1 call function which reset your data for activity — Swapnil Kshirsagar, May 02 '17 at 08:02

score 2 · Accepted Answer · answered May 02 '17 at 08:03

You can try the following

Pass calling Activity context to your AsyncTask in constructor and save it in a variable Context context.

Then in your PostExecute method of AsyncTask, write following lines :

        Intent targetIntent = new Intent(context, TargetActivity.class);
            // Add your data to intent
        targetIntent.putExtra("intent_extra_key", "intent_extra_value");
        context.startActivity(targetIntent);
        ((Activity) context).finish();

Revert back for any issue.

Mukesh M · Answer 2 · 2017-05-02T12:45:28.817

Example:

Note: Remove the comment and delete or use comment for startActivity(i); in onPostExecute(Boolean aBoolean) if you want to test code example below without changing it.

public class MainActivity extends AppCompatActivity {


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    new LoadFromWebAsyncTask(this).execute();
}


private class LoadFromWebAsyncTask extends AsyncTask<Void, Void, Boolean> {

    MainActivity activity;

    LoadFromWebAsyncTask(MainActivity activity) {
        this.activity = activity;
    }

    @Override
    protected Boolean doInBackground(Void... params) {
        return true;
    }

    @Override
    protected void onPostExecute(Boolean aBoolean) {
        super.onPostExecute(aBoolean);

        activity.finish();
        Intent i = new Intent(MainActivity.this, MainActivity.class);
        startActivity(i);

       /* final Handler handler = new Handler();
        handler.postDelayed(new Runnable() {
            @Override
            public void run() {

                activity.finish();
                Intent i = new Intent(MainActivity.this, MainActivity.class);
                startActivity(i);
            }
        }, 5*1000);*/

    }
}
}

Reset Android Activity

2 Answers2