This is my code in the main activity
public class FilterActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_filter);
// Get the ViewPager and set it's PagerAdapter so that it can display items
ViewPager viewPager = (ViewPager) findViewById(R.id.viewpager);
PageAdapter pageAdapter = new PageAdapter(getSupportFragmentManager(), FilterActivity.this);
viewPager.setAdapter(pageAdapter);
// Give the TabLayout the ViewPager
final TabLayout tabLayout = (TabLayout) findViewById(R.id.sliding_tabs);
tabLayout.setupWithViewPager(viewPager);
}
}
And this is my code in the XML
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<include
android:id="@+id/app_bar"
layout="@layout/app_bar">
</include>
<android.support.design.widget.TabLayout
android:id="@+id/sliding_tabs"
android:layout_width="fill_parent"
style="@style/MyCustomTabLayout"
android:layout_height="48dp"/>
<android.support.v4.view.ViewPager
android:id="@+id/viewpager"
android:layout_width="match_parent"
android:layout_height="0px"
android:layout_weight="1"
android:background="@android:color/white" />
</LinearLayout>
I want to change the background color of one tab when it's selected
This question is related to
android
android-tabs
android-tablayout
You can change the background or ripple color of each Tab like this:
//set ripple color for each tab
for(int n = 0; n < mTabLayout.getTabCount(); n++){
View tab = ((ViewGroup)mTabLayout.getChildAt(0)).getChildAt(n);
if(tab != null && tab.getBackground() instanceof RippleDrawable){
RippleDrawable rippleDrawable = (RippleDrawable)tab.getBackground();
if (rippleDrawable != null) {
rippleDrawable.setColor(ColorStateList.valueOf(rippleColor));
}
}
}
Since ViewPager is tending to be replaced by ViewPager2 and we will need to migrate to it.
A quick work around using Java would be something like this:
final List<String> colors = new ArrayList<String>(){
{
add("#FF0000");
add("#800000");
add("#FFFF00");
}
};
ViewPager2 viewPager = findViewById(R.id.viewPager);
ViewPagerAdapter adapter = new ViewPagerAdapter(your_data_structure);
viewPager.setAdapter(adapter);
final TabLayout tabs = findViewById(R.id.tabs);
tabs.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
tab.view.setAlpha((float) 0.5);
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
tab.view.setAlpha(1);
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
TabLayoutMediator mediator = new TabLayoutMediator(tabs, viewPager, new TabLayoutMediator.TabConfigurationStrategy() {
@Override
public void onConfigureTab(@NonNull TabLayout.Tab tab, int position) {
tab.setText("Tab" + position);
/*
* With this feature the TabIndicator color is ignored
* or covered by the new color ex.(if alpha channel is changed the indicator can be seen through)
*/
tab.view.setBackgroundColor(Color.parseColor(colors.get(position))); //You can use your HEX string color
}
});
mediator.attach();
After some messing around this is how I got the desired look (at least in the emulator) and it keeps the ripple effect.
<com.google.android.material.tabs.TabLayout
android:id="@+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabBackground="@drawable/tab_selector"
app:tabIconTint="@drawable/tab_selector"
app:tabIconTintMode="src_atop"
app:tabTextColor="@drawable/tab_selector" />
And the @drawable/tab_selector
:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:color="@color/colorPrimary" android:drawable="@color/colorPrimaryDark" android:state_selected="true" />
<item android:color="@color/colorPrimaryDark" android:drawable="@color/colorPrimary" />
</selector>
FYI: This is what the emulator showed before I added the color
argument to @drawable/tab_selector
:
One of simplest solution is to change colorPrimary from colors.xml file.
You can change the background color of the tab by this attribute
<android.support.design.widget.TabLayout
android:id="@+id/tabs"
style="@style/CategoryTab"
android:layout_width="match_parent"
android:layout_height="wrap_content"
'android:background="@color/primary_color"/>'
One of the ways I could find is using the tab indicator like this:
<com.google.android.material.tabs.TabLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabBackground="@color/normal_unselected_color"
app:tabIndicatorColor="@color/selected_color"
app:tabIndicatorGravity="center"
app:tabIndicatorHeight="150dp"
app:tabSelectedTextColor="@color/selected_text_color"
app:tabTextColor="@color/unselected_text_color">
..... tab items here .....
</com.google.android.material.tabs.TabLayout>
Trick is to:
This also takes care of the smooth animation while switching tabs
As I found best and suitable option for me and it will work with animation too.
You can use indicator
it self as a background.
You can set app:tabIndicatorGravity="stretch"
attribute to use as background.
Example:
<android.support.design.widget.TabLayout
android:id="@+id/tab_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabIndicatorGravity="stretch"
app:tabSelectedTextColor="@color/white"
app:tabTextColor="@color/colorAccent">
<android.support.design.widget.TabItem
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Chef" />
<android.support.design.widget.TabItem
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="User" />
</android.support.design.widget.TabLayout>
Hope it will helps you.
You can try this:
<style name="MyCustomTabLayout" parent="Widget.Design.TabLayout">
<item name="tabBackground">@drawable/background</item>
</style>
In your background xml file:
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_selected="true" android:drawable="@color/white" />
<item android:drawable="@color/black" />
</selector>
Add atribute in xml:
<android.support.design.widget.TabLayout
....
app:tabBackground="@drawable/tab_color_selector"
...
/>
And create in drawable folder, tab_color_selector.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@color/tab_background_selected" android:state_selected="true"/>
<item android:drawable="@color/tab_background_unselected"/>
</selector>
Have you tried checking the API?
You will need to create a listener for the OnTabSelectedListener
event, then when a user selects any tab you should check if it is the correct one, then change the background color using tabLayout.setBackgroundColor(int color)
, or if it is not the correct tab make sure you change back to the normal color again with the same method.
You can have it in the xml.
<android.support.design.widget.TabLayout
android:id="@+id/tabs"
app:tabTextColor="@color/colorGray"
app:tabSelectedTextColor="@color/colorWhite"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
Source: Stackoverflow.com