Cancel Asynctask in android. How to cancel and handle asynctask in android and handle it

useful video : https://youtu.be/7vM-y8v0pro

Step 1 ] Take the Asynctask object whihc executed the task and apply it a cancel() method.

Step2]  Put an 'if ' condition inside the doInbackground() method to check if the task is cancelled and handle it as followed.

Step3] use suitable Cancellation method from the 2 oncancel() method to handle whatbhappens after the task is cancelled. WE CAN ALSO UPDATE THE UI from these methods.

Full code :

public class MainActivity extends AppCompatActivity {
    NestedClass nestedClass;

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

    public void StartMethod(View view) {

       nestedClass = new NestedClass();
        nestedClass.execute();

    }

    public void Cancelmethod(View view) {
       nestedClass.cancel(true);
    }

    class NestedClass extends AsyncTask<String,String,String>{

        @Override
        protected String doInBackground(String... strings) {
            for (int i=0;i<10;i++){
                if (isCancelled()){
                    Log.d("Keyy","Task is cancelled !");
                    //break is very imp since the propgram will
                    // come out if the tasked is cancelled.
                    break;
                }else{
                    Log.d("Keyy","Counter no : " + i);
                    try {
                        Thread.sleep(2000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }
            //This data is passed to the Cancel method() for Data handling
            return null;
        }

        //Call this one if you dont want to handle any Data after Thread cancellation
        @Override
        protected void onCancelled() {
            TextView textView = findViewById(R.id.textview_display);
            textView.setText(" Program cancelled");
        }

        //Call this one if you WANT to handle any Data after Thread cancellation
        //It takes Data returned from the doInBackground() method
        @Override
        protected void onCancelled(String s) {
            TextView textView = findViewById(R.id.textview_display);
            textView.setText(" Program cancelled with Data " + s);
        }
    }

}