How to scroll tablayout programmatically - Android

I found the solution.

First I had found the width of tablayout and scroll it's x position to width and than called the select() method of last tab.

And it works fine.

Below is the code.

mTabLayout.setScrollX(mTabLayout.getWidth());
mTabLayout.getTabAt(lastTabIndex).select();

Updated:

If above is not working you can use the below code as well, it is also working fine.

new Handler().postDelayed(
        new Runnable() {
            @Override public void run() {
                mTabLayout.getTabAt(TAB_NUMBER).select();
            }
        }, 100);

Are you calling tab.select() before the TabLayout and its children have actually been measured and drawn? If so, your TabLayout won't animate to the selection with tab.select() (or Kayvan N's suggestion of scrollTo()). Using a Handler will probably work, but that's not an ideal solution.

Provided the layout hasn't been laid out yet, a ViewTreeObserver will allow you to move to your selected tab after the layout process is finished.

private void scrollToTabAfterLayout(final int tabIndex) {
    if (getView() != null) {
        final ViewTreeObserver observer = mTabLayout.getViewTreeObserver();

        if (observer.isAlive()) {
            observer.dispatchOnGlobalLayout(); // In case a previous call is waiting when this call is made
            observer.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
                @Override
                public void onGlobalLayout() {
                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
                        observer.removeOnGlobalLayoutListener(this);
                    } else {
                        //noinspection deprecation
                        observer.removeGlobalOnLayoutListener(this);
                    }

                    mTabLayout.getTabAt(tabIndex).select();

                }
            });
        }
    }
}

Please comment if you have any suggestions.

I found this solution for me:

    TabLayout tabLayout = activity.getTabLayout();
    tabLayout.setSmoothScrollingEnabled(true);
    tabLayout.setScrollPosition(targetChannelPosition, 0f, true);

Also, if you receive this error: "Only the original thread that created a view hierarchy can touch its views.", you can use this code, in order to run on Ui thread:

    // find a way to get the activity containing the tab layout
    TabLayout tabLayout = activity.getTabLayout();
    activity.runOnUiThread(new Runnable()
    {
        @Override
        public void run()
        {
            TabLayout.Tab tab = tabLayout.getTabAt(targetChannelPosition);
            tab.select();
        }
    });

write this method in your custom tablayout (Your own layout which extends tablayout). So, in future you can use this method whenever you need instad of code duplication

public void selectTabAt(int tabIndex) {
        if (tabIndex >= 0 && tabIndex < getTabCount() && getSelectedTabPosition() != tabIndex) {
            final Tab currentTab = getTabAt(tabIndex);
            if (currentTab != null) {
                this.post(new Runnable() {
                    @Override
                    public void run() {
                        currentTab.select();
                    }
                });
            }
        }
    }

If you don't want yo use CustomLayout. you can just do this

final Tab currentTab = mTabLayout.getTabAt(tabIndex);
if(currentTab != null){
     mTabLayout.post(new Runnable() {
                    @Override
                    public void run() {
                        currentTab.select();
                    }
                });
}