In Android, the
TabLayout widget is typically used together with a
ViewPager and fragments; when a user touch a tab, a fragment associated with the tab is displayed in the activity. But sometimes, I do not want or need fragments for each tab; I just want to execute some code. This post illustrates an example of using the
TabLayout without a
ViewPager and
Fragments and setting a tab selected listener to the
TabLayout.
First, create an XML layout and add in the
TabLayout code. Add in the
TabItem widgets underneath the parent
TabLayout node. You can simple use text or icons (in this example) for the
TabItem labels.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.skyglob.insight.view.MainActivity">
<android.support.design.widget.CoordinatorLayout
android:id="@+id/coordinatorLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="@style/AppTheme.PopupOverlay" />
<android.support.design.widget.TabLayout
android:id="@+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabGravity="fill"
app:tabMode="fixed">
<android.support.design.widget.TabItem
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:icon="@drawable/ic_action_call" />
<android.support.design.widget.TabItem
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:icon="@drawable/ic_action_checkin" />
<android.support.design.widget.TabItem
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:icon="@drawable/ic_action_contacts" />
<android.support.design.widget.TabItem
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:icon="@drawable/ic_action_schedule" />
<android.support.design.widget.TabItem
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:icon="@drawable/ic_action_logout" />
</android.support.design.widget.TabLayout>
</android.support.design.widget.AppBarLayout>
<include layout="@layout/content_main" />
</android.support.design.widget.CoordinatorLayout>
</LinearLayout>
In the activity Java code, add in the tab selected listener. The following is an example showing how to assign a tab selected listener to the
TabLayout widget.
private void setupTabLayout() {
TabLayout mTabLayout = (TabLayout) findViewById(R.id.tabs);
mTabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
onTabTapped(tab.getPosition());
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
onTabTapped(tab.getPosition());
}
});
}
private void onTabTapped(int position) {
switch (position) {
case 0:
// Do something when first tab is tapped here
break;
default:
Toast.makeText(this, "Tapped " + position, Toast.LENGTH_SHORT);
}
}
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