I want to create multilevel tabs in android. It should follow a multilevel hierarchy, or a nested tabs philosophy as shown in image. Please provide the link or url if necessary.
Use Multiple Layers of Android TabLayout, Refer this. TabLayout is quite customize-able. For e.g. adding tabs, setting divider height, using custom views in tabs.
You should use ViewPager to do so. Below code will help you to make multilevel tabs in android.
view_pager_main.xml
<android.support.design.widget.AppBarLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.design.widget.TabLayout
android:id="@+id/tabLayout"
style="@style/MyCustomTabLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabGravity="fill"
app:tabIndicatorColor="@android:color/white"
app:tabIndicatorHeight="3dp"
app:tabMode="fixed"
app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar" />
</FrameLayout>
<android.support.v4.view.ViewPager
android:id="@+id/viewpager"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:color/white" />
<TextView
android:id="@+id/tvNoPlans"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="No Plans Available"
android:textColor="@android:color/black"
android:visibility="gone" />
</android.support.design.widget.AppBarLayout>
view_pager_child.xml
<android.support.design.widget.AppBarLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.design.widget.TabLayout
android:id="@+id/tabLayout_child"
style="@style/MyCustomTabLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabGravity="center"
app:tabIndicatorColor="@color/btn_background"
app:tabIndicatorHeight="3dp"
app:tabMode="scrollable"
app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar" />
</FrameLayout>
<View
android:layout_width="fill_parent"
android:layout_height="1dp"
android:background="@android:color/darker_gray"/>
<android.support.v4.view.ViewPager
android:id="@+id/viewpager_child"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:color/white" />
</android.support.design.widget.AppBarLayout>
ViewPagerMain.java
public class ViewPagerMain extends Fragment {
ViewPager viewpager;
TabLayout tabLayout;
TextView tvNoPlans;
View rootview;
Fragment fr = null;
ArrayList<String> cat_id = new ArrayList<String>();
ArrayList<String> cat_name = new ArrayList<String>();
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
rootview = inflater.inflate(R.layout.view_pager_main, container, false);
tvNoPlans = (TextView) rootview.findViewById(R.id.tvNoPlans);
viewpager = (ViewPager) rootview.findViewById(R.id.viewpager);
viewpager.setOffscreenPageLimit(3);
tabLayout = (TabLayout) rootview.findViewById(R.id.tabLayout);
cat_id.add(0,"1");
cat_id.add(1,"2");
cat_name.add(0,"Parent1");
cat_name.add(1,"Parent2");
setupViewpager(viewpager);
tabLayout.post(new Runnable() {
@Override
public void run() {
tabLayout.setupWithViewPager(viewpager);
}
});
tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
viewpager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
return rootview;
}
public void setupViewpager(ViewPager viewPager) {
ViewpagerAdapter adapter = new ViewpagerAdapter(getChildFragmentManager());
for (int i = 0; i < cat_id.size(); i++) {
Bundle bundle = new Bundle();
bundle.putString("cat_id",cat_id.get(i));
fr = new ViewPagerChild();
fr.setArguments(bundle);
adapter.addFrag(fr, cat_name.get(i));
}
viewPager.setAdapter(adapter);
}
}
ViewPagerChild.java
public class ViewPagerChild extends Fragment {
ViewPager viewPager_child;
TabLayout tabLayout_child;
SharedPreferences preferences;
View rootview;
String cat_id;
ArrayList<String> subcat_id = new ArrayList<String>();
ArrayList<String> subcat_name = new ArrayList<String>();
Bundle bundle;
Fragment fr = null;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
rootview = inflater.inflate(R.layout.view_pager_child, container, false);
preferences = getActivity().getSharedPreferences(Constant.PREF_MAIN, 0);
bundle = getArguments();
cat_id = bundle.getString("cat_id");
viewPager_child = (ViewPager) rootview.findViewById(R.id.viewpager_child);
viewPager_child.setOffscreenPageLimit(10);
tabLayout_child = (TabLayout) rootview.findViewById(R.id.tabLayout_child);
subcat_id.add(0,"1");
subcat_id.add(1, "2");
subcat_name.add(0,"Child1");
subcat_name.add(1,"Child2");
setupViewpagerChild(viewPager_child);
tabLayout_child.post(new Runnable() {
@Override
public void run() {
tabLayout_child.setupWithViewPager(viewPager_child);
}
});
tabLayout_child.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager_child.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
return rootview;
}
public void setupViewpagerChild(ViewPager viewPager_child) {
ViewpagerAdapter adapter = new ViewpagerAdapter(getChildFragmentManager());
for (int i = 0; i < subcat_id.size(); i++) {
fr = new TabFragment();
adapter.addFrag(fr, subcat_name.get(i));
}
viewPager_child.setAdapter(adapter);
}
}
ViewpagerAdapter.java
public class ViewpagerAdapter extends FragmentPagerAdapter {
private final List<android.app.Fragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();
public ViewpagerAdapter(FragmentManager manager){
super(manager);
}
@Override
public Fragment getItem(int position) {
return mFragmentList.get(position);
}
@Override
public int getCount() {
return mFragmentList.size();
}
@Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
public void addFrag(Fragment fragment,String title){
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
}
tab_fragment.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/tv"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:text="Hello There!!!"/>
</LinearLayout>
TabFragment.java
public class TabFragment extends Fragment {
View rootview;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
rootview = inflater.inflate(R.layout.fragment_tab, container, false);
return rootview;
}
}
来源：https://stackoverflow.com/questions/34261057/android-how-to-build-multiplelevel-tabs