I have setup tabs as UPDATE 29/05/2015 this post. Tabs take full width on my Nexus 4 mobile but on nexus 7 tablet it in center and not cover full screen width.
Nexus 7 screenshotNexus 4 screenshot
A "simpler" answer borrowed from Kaizie would just be adding app:tabMaxWidth="0dp"
in your TabLayout
xml:
<android.support.design.widget.TabLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabMaxWidth="0dp"
app:tabGravity="fill"
app:tabMode="fixed" />
I had the same problem and I checked the TabLayout style, and i found that its default style is Widget.Design.TabLayout
which has different implementations (normal, landscape and sw600dp).
The one we need is the one for tablets (sw600dp) which has the following implementation:
<style name="Widget.Design.TabLayout" parent="Base.Widget.Design.TabLayout">
<item name="tabGravity">center</item>
<item name="tabMode">fixed</item>
</style>
From this style we will use " tabGravity " (which possible values are "center" or "fill") using the "fill" value.
But we need to go deeper, and then we see that this one extends from Base.Widget.Design.TabLayout
, which implementation is:
<style name="Base.Widget.Design.TabLayout" parent="android:Widget">
<item name="tabMaxWidth">@dimen/tab_max_width</item>
<item name="tabIndicatorColor">?attr/colorAccent</item>
<item name="tabIndicatorHeight">2dp</item>
<item name="tabPaddingStart">12dp</item>
<item name="tabPaddingEnd">12dp</item>
<item name="tabBackground">?attr/selectableItemBackground</item>
<item name="tabTextAppearance">@style/TextAppearance.Design.Tab</item>
<item name="tabSelectedTextColor">?android:textColorPrimary</item>
</style>
So, from this style we will need to override " tabMaxWidth ". In my case I set it to 0dp
, so it has no limit.
And my style looked like this:
<style name="MyTabLayout" parent="Widget.Design.TabLayout">
<item name="tabGravity">fill</item>
<item name="tabMaxWidth">0dp</item>
</style>
And then the tab bar will fill the whole screen from side to side.
Solution for scrollable: (TabLayout.MODE_SCROLLABLE), that is when ever you need more than 2 tabs (Dynamic tabs)
Step 1 : style.xml
<style name="tabCustomStyle" parent="Widget.Design.TabLayout">
<item name="tabGravity">fill</item>
<item name="tabMaxWidth">0dp</item>
<item name="tabIndicatorColor">#FFFEEFC4</item>
<item name="tabIndicatorHeight">2dp</item>
<item name="tabTextAppearance">@style/MyCustomTabTextAppearance</item>
<item name="tabSelectedTextColor">#FFFEEFC4</item>
</style>
<style name="MyCustomTabTextAppearance" parent="TextAppearance.Design.Tab">
<item name="android:textSize">@dimen/tab_text_size</item>
<item name="android:textAppearance">@style/TextAppearance.roboto_medium</item>
<item name="textAllCaps">true</item>
</style>
<style name="TextAppearance.roboto_medium" parent="android:TextAppearance">
<item name="android:fontFamily">sans-serif-medium</item>
</style>
Step 2 : Your xml layout
<android.support.design.widget.TabLayout
android:id="@+id/sliding_tabs"
style="@style/tabCustomStyle"
android:layout_width="match_parent"
android:layout_height="@dimen/tab_strip_height"
android:background="@color/your_color"
app:tabMode="scrollable"
app:tabTextColor="@color/your_color" />
Step 3: In your Activity/Fragment where ever you have tabs.
/**
* To allow equal width for each tab, while (TabLayout.MODE_SCROLLABLE)
*/
private void allotEachTabWithEqualWidth() {
ViewGroup slidingTabStrip = (ViewGroup) mTabLayout.getChildAt(0);
for (int i = 0; i < mTabLayout.getTabCount(); i++) {
View tab = slidingTabStrip.getChildAt(i);
LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams) tab.getLayoutParams();
layoutParams.weight = 1;
tab.setLayoutParams(layoutParams);
}
}
To force tabs to take up the full width (split into equal sizes), apply the following to the TabLayout
view:
TabLayout tabLayout = (TabLayout) findViewById(R.id.your_tab_layout);
tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
tabLayout.setTabMode(TabLayout.MODE_FIXED);
This is helpful you must try
<android.support.design.widget.TabLayout
android:id="@+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabMaxWidth="0dp"
app:tabGravity="fill"
app:tabMode="fixed"
app:tabIndicatorColor="@color/white"
app:tabSelectedTextColor="@color/white"
app:tabTextColor="@color/orange" />
<android.support.design.widget.TabLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabMaxWidth="0dp"
app:tabGravity="fill"
app:tabMode="fixed" />
work for me. This also have xmlns:app="http://schemas.android.com/apk/res-auto"
Just did this and worked like a charm
<com.google.android.material.tabs.TabLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabGravity="fill"
app:tabMaxWidth="0dp"/>
For me the following code worked and was enough.
<android.support.design.widget.TabLayout
android:id="@+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabGravity="fill"/>
Solution for Scrollable (Kotlin)
In xml:
<com.google.android.material.tabs.TabLayout
android:id="@+id/home_tab_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabMaxWidth="0dp"
app:tabMode="scrollable"
android:fillViewport="true"
app:tabGravity="fill" />
In Kotlin:
In my case if less than 3 tabs I allocate equal space.
Note: If condition is as per your requirement
if(list.size <= 3){
allotEachTabWithEqualWidth(your_tab_layout)
}
fun allotEachTabWithEqualWidth(tabLayout: TabLayout) {
tabLayout.tabMode= TabLayout.MODE_SCROLLABLE
val slidingTabStrip = tabLayout.getChildAt(0) as ViewGroup
for (i in 0 until tabLayout.getTabCount()) {
val tab = slidingTabStrip.getChildAt(i)
val layoutParams = tab.layoutParams as LinearLayout.LayoutParams
layoutParams.weight = 1f
tab.layoutParams = layoutParams
}
}
Check below code for solutions.
Below is layout code:
<com.yourpackage.CustomTabLayout
android:id="@+id/tabs"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="@color/off_white"
app:tabIndicatorColor="@color/primaryColor"
app:tabIndicatorHeight="3dp"
app:tabMode="scrollable"
app:tabPaddingEnd="0dp"
app:tabPaddingStart="0dp" />
Note, for dynamic tab count, don't forget to call setTabNumbers(tabcount).
import android.content.Context;
import android.support.design.widget.TabLayout;
import android.util.AttributeSet;
import android.util.
import java.lang.reflect.Field;
public class CustomTabLayout extends TabLayout
{
private static final int WIDTH_INDEX = 0;
private int DIVIDER_FACTOR = 3;
private static final String SCROLLABLE_TAB_MIN_WIDTH = "mScrollableTabMinWidth";
public CustomTabLayout(Context context) {
super(context);
initTabMinWidth();
}
public CustomTabLayout(Context context, AttributeSet attrs) {
super(context, attrs);
initTabMinWidth();
}
public CustomTabLayout(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initTabMinWidth();
}
public void setTabNumbers(int num)
{
this.DIVIDER_FACTOR = num;
initTabMinWidth();
}
private void initTabMinWidth()
{
int[] wh = getScreenSize(getContext());
int tabMinWidth = wh[WIDTH_INDEX] / DIVIDER_FACTOR;
Log.v("CUSTOM TAB LAYOUT", "SCREEN WIDTH = " + wh[WIDTH_INDEX] + " && tabTotalWidth = " + (tabMinWidth*DIVIDER_FACTOR) + " && TotalTabs = " + DIVIDER_FACTOR);
Field field;
try {
field = TabLayout.class.getDeclaredField(SCROLLABLE_TAB_MIN_WIDTH);
field.setAccessible(true);
field.set(this, tabMinWidth);
} catch (NoSuchFieldException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
private static final int WIDTH_INDEX = 0;
private static final int HEIGHT_INDEX = 1;
public static int[] getScreenSize(Context context) {
int[] widthHeight = new int[2];
widthHeight[WIDTH_INDEX] = 0;
widthHeight[HEIGHT_INDEX] = 0;
try {
WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
Display display = windowManager.getDefaultDisplay();
Point size = new Point();
display.getSize(size);
widthHeight[WIDTH_INDEX] = size.x;
widthHeight[HEIGHT_INDEX] = size.y;
if (!isScreenSizeRetrieved(widthHeight))
{
DisplayMetrics metrics = new DisplayMetrics();
display.getMetrics(metrics);
widthHeight[0] = metrics.widthPixels;
widthHeight[1] = metrics.heightPixels;
}
// Last defense. Use deprecated API that was introduced in lower than API 13
if (!isScreenSizeRetrieved(widthHeight)) {
widthHeight[0] = display.getWidth(); // deprecated
widthHeight[1] = display.getHeight(); // deprecated
}
} catch (Exception e) {
e.printStackTrace();
}
return widthHeight;
}
private static boolean isScreenSizeRetrieved(int[] widthHeight) {
return widthHeight[WIDTH_INDEX] != 0 && widthHeight[HEIGHT_INDEX] != 0;
}
}
Reference taken from https://medium.com/@elsenovraditya/set-tab-minimum-width-of-scrollable-tablayout-programmatically-8146d6101efe
In my variant of this problem, I had 3 tabs of moderate size which weren't taking up full width on tablets. I didn't need the tabs to be scrollable on tablets, since tablets are big enough to display the tabs all together without any scrolling. But I did need the tabs to be scrollable on phones, since phones are too small to display all the tabs together.
The best solution in my case was to add a res/layout-sw600dp/main_activity.xml
file, where the relevant TabLayout could have app:tabGravity="fill"
and app:tabMode="fixed"
. But in my regular res/layout/main_activity.xml
, I left out app:tabGravity="fill"
and app:tabMode="fixed"
, and had app:tabMode="scrollable"
instead.
Please note that you also need to set
app:tabPaddingStart="-1dp"
app:tabPaddingEnd="-1dp"
to fill all space
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