android – Getting the textview of the TabLayout's tab

This is working solution

int wantedTabIndex = 0;
TextView tv = (TextView)(((LinearLayout)((LinearLayout)mTabLayout.getChildAt(0)).getChildAt(wantedTabIndex)).getChildAt(1));
tv.setText("Hello world!");

Just change the last index Zero to One now above code will work

Removed Crash

java.lang.ClassCastException: android.widget.ImageView cannot be cast to android.widget.TextView

With a given tab:

 int wantedTabIndex = 0;
 TextView tv = (TextView)(((LinearLayout)((LinearLayout)mTabLayout.getChildAt(0)).getChildAt(wantedTabIndex)).getChildAt(0));
 tv.setText("Hello world!");

    public static void setTextViewsCapsOff(View view) {
        if (!(view instanceof ViewGroup)) {
            return;
        }
        ViewGroup group = (ViewGroup)view;
        for (int i = 0; i < group.getChildCount(); i++) {
            View child = group.getChildAt(i);
            if (child instanceof TextView) {
                ((TextView)child).setAllCaps(false);
            } else {
                setTextViewsCapsOff(child);
            }
        }
    }

Pass in your TabLayout to this recursive method. It will find any child that is a TextView and set its All Caps mode off. Avoids all the other very specific typecasting. If it does not appear to work call it later in your code. I had it in onCreate but that did not work. Called it later in code and it worked perfectly.

Affects all Tabs, not just one but I figure this is the most common usage. Not specific to TabLayout either. Can be used for any layout that contains TextViews you want to change.

This worked for me:

tabLayout.getTabAt(0).setText("some text");

Replace 0 with the index of the tab you want to edit. I think your tabLayout needs to be populated before calling this, otherwise tablayout.getTabAt(0) will return null.

I think the best thing to do here is create a custom layout with a TextView and then assign the custom view to the tabs you want to edit

final TabLayout.Tab tabAt = tabLayout.getTabAt(index);
tabAt.setCustomView(myLayoutId);

In this way you can do whatever you want with the TextView that is inside the layout

Add onTabSelectedListener to your tabLayout to set text dynamically.
so in this approach when tab will be selected text will become “selected” or other tab

 tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
        @Override
        public void onTabSelected(TabLayout.Tab tab) {
            tab.getCustomView().setAlpha(1.0f);
            ((TextView) tab.getCustomView()).setTextSize(12);
            ((TextView) tab.getCustomView()).setText("Selected");
            Log.d("TabBar", "selected");
        }

        @Override
        public void onTabUnselected(TabLayout.Tab tab) {
            tab.getCustomView().setAlpha(0.3f);//to set alpha 

            ((TextView) tab.getCustomView()).setTextSize(11);
            ((TextView) tab.getCustomView()).setText("DeSelected");
            Log.d("TabBar", "unselected");
        }

        @Override
        public void onTabReselected(TabLayout.Tab tab) {
            Log.d("TabBar", "reselected");
        }
    });

to set tab as default selected then use this statement

tabLayout.getTabAt(0).select(); //this is used to set tab as default