Menu under the toolbar. No tabs name

Question

Trying to do so -

Java code

//Pager TabsViewPagerAdapter adapter = new TabsViewPagerAdapter(getSupportFragmentManager()); adapter.addFragment(new Fragment1(), "Первый"); adapter.addFragment(new Fragment2(), "Second"); viewPager.setAdapter(adapter); //Set tabs tabLayout.setupWithViewPager(viewPager);

So here's my class for you -

 public class PagerAdapterHelper extends FragmentPagerAdapter { private final List<Fragment> mFragmentList = new ArrayList<>(); private final List<String> mFragmentTitleList = new ArrayList<>(); public PagerAdapterHelper(FragmentManager manager) { super(manager); } @Override public Fragment getItem(int position) { return mFragmentList.get(position); } @Override public int getCount() { return mFragmentList.size(); } public void addFragment(Fragment fragment, String title) { mFragmentList.add(fragment); mFragmentTitleList.add(title); } @Override public CharSequence getPageTitle(int position) { switch (position) { case 0: return "ONE"; case 1: return "TWO"; default: return "WTF"; } }

}

After launching Activiti there is a toolbar and a field under it, but for some reason there are no tabs on it. Also, the fragments themselves are quietly displayed / scrolling. On the tabs, you can poke, all the rules, only there are no inscriptions (

Mr Klonwar 404 6 17 · Accepted Answer · 2016-08-25T08:32:10

To do this, apply tabs.

Markup Code:

 <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:id="@+id/activity" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@color/colorLightGray"> <android.support.design.widget.AppBarLayout android:id="@+id/appBar" android:layout_width="match_parent" android:layout_height="wrap_content" android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"> <android.support.v7.widget.Toolbar android:id="@+id/toolbar" android:layout_width="match_parent" android:layout_height="?attr/actionBarSize" android:background="?attr/colorPrimary" app:layout_scrollFlags="scroll|enterAlways" app:popupTheme="@style/ThemeOverlay.AppCompat.Light"> </android.support.v7.widget.Toolbar> <android.support.design.widget.TabLayout android:id="@+id/tabs" android:layout_width="match_parent" android:layout_height="wrap_content" app:tabGravity="fill" app:tabMode="scrollable" /> </android.support.design.widget.AppBarLayout> <android.support.v4.view.ViewPager android:id="@+id/viewpager" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_below="@+id/appBar" app:layout_behavior="@string/appbar_scrolling_view_behavior" /> </RelativeLayout>

Add code:

  Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); assert toolbar != null; setSupportActionBar(toolbar); viewPager = (ViewPager) findViewById(R.id.viewpager); tabLayout = (TabLayout) findViewById(R.id.tabs); TabsViewPagerAdapter adapter = new TabsViewPagerAdapter(getSupportFragmentManager()); adapter.addFragment(new Fragment1(), "ssss"); adapter.addFragment(new Fragment2(), "Second"); viewPager.setAdapter(adapter); viewPager.setAdapter(adapter); assert tabLayout != null; tabLayout.setupWithViewPager(viewPager); tabLayout.setupWithViewPager(viewPager); tabLayout.getTabAt(0).setText("1"); tabLayout.getTabAt(1).setText("2");

Adapter code:

 public class TabsViewPagerAdapter extends FragmentPagerAdapter { private final List<Fragment> mFragmentList = new ArrayList<>(); private final List<String> mFragmentTitleList = new ArrayList<>(); public TabsViewPagerAdapter(FragmentManager manager) { super(manager); } @Override public Fragment getItem(int position) { return mFragmentList.get(position); } @Override public int getCount() { return mFragmentList.size(); } public void addFragment(Fragment fragment, String title) { mFragmentList.add(fragment); mFragmentTitleList.add(title); } @Override public CharSequence getPageTitle(int position) { return mFragmentTitleList.get(position); } }

@MrKlonwar, these are your 2 fragments, which you will display in tabs.
There are no more errors, but for some reason, when the activation is started, the tabs do not appear, just an empty green line
add method to adapter - @Override public CharSequence getPageTitle (int position) {return mFragmentTitleList.get (position);
After adding the method, nothing has changed (he adds the fragment itself, but there

Tim K. Tim K. 316 one 7 · Answer 2 · 2016-08-25T08:35:35

build.gradle

 dependencies { compile 'com.android.support:design:23.1.1' }

activity_pull_to_refresh.xml

 <android.support.v7.widget.Toolbar android:id="@+id/toolbar" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="?attr/colorPrimary"/> <android.support.design.widget.TabLayout android:id="@+id/tab_layout" android:layout_width="match_parent" android:layout_height="wrap_content"/> <android.support.v4.view.ViewPager android:id="@+id/pager" android:layout_width="match_parent" android:layout_height="match_parent"/>

TabLayoutActivity.class

 public class TabLayoutActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_pull_to_refresh); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout); ViewPager viewPager = (ViewPager) findViewById(R.id.pager); if (toolbar != null) { setSupportActionBar(toolbar); } viewPager.setAdapter(new SectionPagerAdapter(getSupportFragmentManager())); tabLayout.setupWithViewPager(viewPager); } public class SectionPagerAdapter extends FragmentPagerAdapter { public SectionPagerAdapter(FragmentManager fm) { super(fm); } @Override public Fragment getItem(int position) { switch (position) { case 0: return new FirstTabFragment(); case 1: default: return new SecondTabFragment(); } } @Override public int getCount() { return 2; } @Override public CharSequence getPageTitle(int position) { switch (position) { case 0: return "First Tab"; case 1: default: return "Second Tab"; } } } }

Menu under the toolbar. No tabs name

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