How to disable onItemSelectedListener to be invoked when setting selected item by code

Question

Just wondering how you handle the following problem: a result is calculated depending on two spinners\' selected items. To handle the UI things, i.e. a user picks a new item in

Answer 1

My solution is very easy. First initialize a global boolean variable.

boolean shouldWork = true;

Then use below code in your onCreate() method.

Spinner spinner = findViewById(R.id.spinner);
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
    @Override
    public void onItemSelected(AdapterView adapter, View v, int i, long lng) {
        if (shouldWork) {
               // Do your actions here
        }
        else
            shouldWork = true;
    }
    public void onNothingSelected(AdapterView parentView)  {

    }
});

Now you can use the setSelection method in everwhere without invoking the onItemSelected() method by below code.

shouldWork = false;
spinner.setSelection(0);