findViewById, causing missing adapter error

[DiogoTheCoder]

When I execute DotsIndicator dotsIndicator = findViewById(R.id.dots_indicator_view_pager_insights);, getting an error message straight away

DotsIndicator: You have to set an adapter to the view pager before !

I do set the adapter right after the findViewById, shouldn't the message appear later on, if no adapter has yet been set?

[tommybuonomo]

Hi @DiogoTheCoder,
You have to set an adapter to the view pager before setting the view pager to the dots indicator.

[DiogoTheCoder]

Hi @tommybuonomo
I believe I am currently setting the adapter to the view pager first, then the dots indicator.

Example:

DotsIndicator dailyNutrientsInsightsDotsIndicator = findViewById(R.id.dots_indicator_view_pager_nutrients_insights);

dailyNutrientsInsightsViewPager.setAdapter(dailyNutrientsInsightsPageAdapter);
dailyNutrientsInsightsDotsIndicator.setViewPager(dailyNutrientsInsightsViewPager);

[tommybuonomo]

Are you sure that your dailyNutrientsInsightsPageAdapter is not null at this point ?

[DiogoTheCoder]

Just checked and according to the debugger, it isn't equal to null.

[tommybuonomo]

Sorry but the code is clear:

if (viewPager != null && viewPager.getAdapter() != null) {
      ...
    } else {
      Log.e(DotsIndicator.class.getSimpleName(), "You have to set an adapter to the view pager before !");
    }

You have an error somewhere in your code.

[Selidinok]

I have similar issue. DotsIndicator call refreshDots() inside init(AttributeSet attrs) method when class initialize. So even viewPager = null at that moment.