Android Tab layout: Wrap tab indicator width with

Question

Is there any way to wrap tab indicator width with respect to tab title ?

Answer 1

Wrap tab indicator width with respect to tab title and add right padding with tab title and right margin with tab indicator.

public class TabLayoutActivity extends AppCompatActivity {

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

        TabLayout tabs = (TabLayout) findViewById(R.id.tabs);

        tabs.setTabTextColors(Color.parseColor("#727272"), Color.parseColor("#305b0d"));


        ViewPager pager = (ViewPager) findViewById(R.id.pager);
        TabsPagerAdapter adapter = new TabsPagerAdapter(getSupportFragmentManager());

        pager.setAdapter(adapter);
        tabs.setupWithViewPager(pager);

        wrapTabIndicatorToTitle(tabs,20,20);

    }
    public void wrapTabIndicatorToTitle(TabLayout tabLayout, int externalMargin, int internalMargin) {
        View tabStrip = tabLayout.getChildAt(0);
        if (tabStrip instanceof ViewGroup) {
            ViewGroup tabStripGroup = (ViewGroup) tabStrip;
            int childCount = ((ViewGroup) tabStrip).getChildCount();
            for (int i = 0; i < childCount; i++) {
                View tabView = tabStripGroup.getChildAt(i);


                //set minimum width to 0 for instead for small texts, indicator is not wrapped as expected
                tabView.setMinimumWidth(0);
                // set padding to 0 for wrapping indicator as title
                tabView.setPadding(0, tabView.getPaddingTop(), 40, tabView.getPaddingBottom());
                // setting custom margin between tabs
                if (tabView.getLayoutParams() instanceof ViewGroup.MarginLayoutParams) {
                    ViewGroup.MarginLayoutParams layoutParams = (ViewGroup.MarginLayoutParams) tabView.getLayoutParams();
                    if (i == 0) {
                        // left
                        setMargin(layoutParams, externalMargin, internalMargin);
                    } else if (i == childCount - 1) {
                        // right
                        setMargin(layoutParams, internalMargin, externalMargin);
                    } else {
                        // internal
                        setMargin(layoutParams, internalMargin, internalMargin);
                    }
                }
            }

            tabLayout.requestLayout();
        }
    }

    private void setMargin(ViewGroup.MarginLayoutParams layoutParams, int start, int end) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
            layoutParams.setMarginStart(start);
            layoutParams.setMarginEnd(end);
        } else {
            layoutParams.leftMargin = start;
            layoutParams.rightMargin = end;
        }
    }
}

Answer 2

Yes, it's possible to wrap tab indicator as title setting padding to 0

 public void wrapTabIndicatorToTitle(TabLayout tabLayout, int externalMargin, int internalMargin) {
        View tabStrip = tabLayout.getChildAt(0);
        if (tabStrip instanceof ViewGroup) {
            ViewGroup tabStripGroup = (ViewGroup) tabStrip;
            int childCount = ((ViewGroup) tabStrip).getChildCount();
            for (int i = 0; i < childCount; i++) {
                View tabView = tabStripGroup.getChildAt(i);
                //set minimum width to 0 for instead for small texts, indicator is not wrapped as expected
                tabView.setMinimumWidth(0);
                // set padding to 0 for wrapping indicator as title
                tabView.setPadding(0, tabView.getPaddingTop(), 0, tabView.getPaddingBottom());
                // setting custom margin between tabs
                if (tabView.getLayoutParams() instanceof ViewGroup.MarginLayoutParams) {
                    ViewGroup.MarginLayoutParams layoutParams = (ViewGroup.MarginLayoutParams) tabView.getLayoutParams();
                    if (i == 0) {
                        // left
                        settingMargin(layoutParams, externalMargin, internalMargin);
                    } else if (i == childCount - 1) {
                        // right
                        settingMargin(layoutParams, internalMargin, externalMargin);
                    } else {
                        // internal
                        settingMargin(layoutParams, internalMargin, internalMargin);
                    }
                }
            }

            tabLayout.requestLayout();
        }
}

private void settingMargin(ViewGroup.MarginLayoutParams layoutParams, int start, int end) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
        layoutParams.setMarginStart(start);
        layoutParams.setMarginEnd(end);
        layoutParams.leftMargin = start;
        layoutParams.rightMargin = end;
    } else {
        layoutParams.leftMargin = start;
        layoutParams.rightMargin = end;
    }
}

EDIT: As of com.android.support:design:28.0.0, you can adjust the indicator as label easily now setting:

app:tabIndicatorFullWidth="false"

EDIT July 2019: Use the androidX dependency com.google.android.material:material:x.x.x

Answer 3

There's a attribute called tabIndicatorFullWidth inside android.support.design.widget.TabLayout

<android.support.design.widget.TabLayout
    android:id="@+id/tablayout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:tabBackground="@color/colorPrimary"

    app:tabIndicatorFullWidth="false" // tested okay on 8.1 , 6.0.1 

    app:tabTextColor="@color/colorAccent"
    app:tabTextAppearance="@style/CampusTabText"
    android:minHeight="?attr/actionBarSize"
    app:tabMaxWidth="0dp"
    app:tabGravity="fill"
    app:tabMode="fixed" />

Answer 4

If you don't need the strip to be smaller than the text, then this should work:

public static void reduceMarginsInTabs(TabLayout tabLayout, int marginOffset) {

    View tabStrip = tabLayout.getChildAt(0);
    if (tabStrip instanceof ViewGroup) {
        ViewGroup tabStripGroup = (ViewGroup) tabStrip;
        for (int i = 0; i < ((ViewGroup) tabStrip).getChildCount(); i++) {
            View tabView = tabStripGroup.getChildAt(i);
            if (tabView.getLayoutParams() instanceof ViewGroup.MarginLayoutParams) {
                ((ViewGroup.MarginLayoutParams) tabView.getLayoutParams()).leftMargin = marginOffset;
                ((ViewGroup.MarginLayoutParams) tabView.getLayoutParams()).rightMargin = marginOffset;
            }
        }

        tabLayout.requestLayout();
    }
}

For added points you could check the text size of each title.