android टुकड़े के अंदर एंड्रॉइड टैबलेट




android-fragments android-recyclerview (5)

मैं Navigation Drawer का प्रयोग उन सभी टुकड़ों के बीच नेविगेट करने के लिए कर रहा हूँ, जो वे सभी मुख्य सामग्री टूलबार का उपयोग करते हैं, लेकिन हर टुकड़ा के पास 3 टैब के साथ अपने TabLayout हैं और प्रत्येक टैब में मैं RecyclerView TabLayout का इस्तेमाल विभिन्न पाठ और छवियों को दिखाने के लिए कर रहा हूं।

मैंने पिछली बार टुकड़ों के बजाय actvities का उपयोग किया था, लेकिन अब ड्रॉवर का इस्तेमाल करके टुकड़ों का उपयोग करने के लिए यह प्रयोग किया जाता है।

मेरे पास एक बिंदु है जहां टैब काम करते हैं, लेकिन जैसे ही मैं ViewPager को टैब में डालता हूं और एडेप्टर को टैब्स से जोड़ता हूं और मैं दराज से नया टुकड़ा खोलता हूं, मुझे एक नल पॉइंटर मिलता है, जो यहां समस्या हो सकती है?

MainActivity.java

public class MainActivity extends AppCompatActivity

    implements NavigationView.OnNavigationItemSelectedListener {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
            this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
    drawer.setDrawerListener(toggle);
    toggle.syncState();

    NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
    navigationView.setNavigationItemSelectedListener(this);
}

@Override
public void onBackPressed() {
    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    if (drawer.isDrawerOpen(GravityCompat.START)) {
        drawer.closeDrawer(GravityCompat.START);
    } else {
        super.onBackPressed();
    }
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    int id = item.getItemId();
    return id == R.id.action_settings || super.onOptionsItemSelected(item);

}

@Override
public boolean onNavigationItemSelected(MenuItem item) {
    int id = item.getItemId();
    Fragment fragment;

    if (id == R.id.fragment_one) {
        fragment = new NewFragment();
        FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
        ft.replace(R.id.container, fragment);
        ft.commit();

    } else if (id == R.id.fragment_two) {

        fragment = new NewFragment();
        FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
        ft.replace(R.id.container, fragment);
        ft.commit();

    } else if (id == R.id.fragment_three) {

        fragment = new NewFragment();
        FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
        ft.replace(R.id.container, fragment);
        ft.commit();

    }

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    drawer.closeDrawer(GravityCompat.START);
    return true;
}
}

activity_main.xml

<android.support.v4.widget.DrawerLayout 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:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">

<android.support.design.widget.CoordinatorLayout 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:fitsSystemWindows="true"
    tools:context="com.xcandy.guideforfifa17.MainActivity">

    <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.AppBarLayout>

    <include layout="@layout/content_main" />

</android.support.design.widget.CoordinatorLayout>

<android.support.design.widget.NavigationView
    android:id="@+id/nav_view"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    android:fitsSystemWindows="true"
    app:headerLayout="@layout/nav_header_main"
    app:menu="@menu/activity_main_drawer" />

</android.support.v4.widget.DrawerLayout>

NewFragment.java

public class NewFragment extends Fragment {

private RecyclerView mRecyclerView;


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.activity_fragment_one, container, false);

    TabLayout tabLayout = (TabLayout) view.findViewById(R.id.tabs);
    tabLayout.addTab(tabLayout.newTab().setText("A"));
    tabLayout.addTab(tabLayout.newTab().setText("B"));
    tabLayout.addTab(tabLayout.newTab().setText("C"));

    final ViewPager viewPager = (ViewPager) view.findViewById(R.id.viewpager);

    mRecyclerView = (RecyclerView) view.findViewById(R.id.recycler_view);

    RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getActivity());
    mRecyclerView.setLayoutManager(mLayoutManager);


    viewPager.setAdapter(new PagerAdapter
            (getFragmentManager(), tabLayout.getTabCount()));
    viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
    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 view;
}

public class PagerAdapter extends FragmentStatePagerAdapter {
    int mNumOfTabs;

    public PagerAdapter(FragmentManager fm, int NumOfTabs) {
        super(fm);
        this.mNumOfTabs = NumOfTabs;
    }



    @Override
    public Fragment getItem(int position) {

        switch (position) {
            case 0:

                RecyclerView.Adapter mAdapter = new AdapterOne();
                mRecyclerView.setAdapter(mAdapter);

            case 1:

                mAdapter = new AdapterTwo();
                mRecyclerView.setAdapter(mAdapter);

            case 2:

                mAdapter = new AdapterThree();
                mRecyclerView.setAdapter(mAdapter);

            default:
                return null;
        }
    }

    @Override
    public int getCount() {
        return mNumOfTabs;
    }
}
}

activity_fragment.xml

<android.support.design.widget.CoordinatorLayout 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:fitsSystemWindows="true"
tools:context=".NewFragment">

<android.support.design.widget.AppBarLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:theme="@style/AppTheme.AppBarOverlay">

    <android.support.design.widget.TabLayout
        android:id="@+id/tabs"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:tabMode="fixed"
        app:tabGravity="fill"/>

</android.support.design.widget.AppBarLayout>

<android.support.v4.view.ViewPager
    android:id="@+id/viewpager"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@android:color/white"/>

<android.support.v7.widget.RecyclerView
    android:id="@+id/recycler_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    />

</android.support.design.widget.CoordinatorLayout>

त्रुटि संग्रह

                  --------- beginning of crash
06-23 11:19:56.985 2466-2466/com.candyx.sims E/AndroidRuntime: FATAL EXCEPTION: main
                                                               Process: com.candyx.sims, PID: 2466
                                                               java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.widget.RecyclerView.setLayoutManager(android.support.v7.widget.RecyclerView$LayoutManager)' on a null object reference
                                                                   at com.candyx.sims.BlankFragment.onCreateView(BlankFragment.java:38)
                                                                   at android.support.v4.app.Fragment.performCreateView(Fragment.java:1974)
                                                                   at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1067)
                                                                   at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1252)
                                                                   at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:742)
                                                                   at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1617)
                                                                   at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:517)
                                                                   at android.os.Handler.handleCallback(Handler.java:739)
                                                                   at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                   at android.os.Looper.loop(Looper.java:135)
                                                                   at android.app.ActivityThread.main(ActivityThread.java:5254)
                                                                   at java.lang.reflect.Method.invoke(Native Method)
                                                                   at java.lang.reflect.Method.invoke(Method.java:372)
                                                                   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
                                                                   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
06-23 11:23:14.912 5839-5873/com.candyx.sims D/OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: true

                                                               [ 06-23 11:23:14.920  5839: 5839 D/         ]
                                                               HostConnection::get() New Host Connection established 0xb4125190, tid 5839
06-23 11:23:14.927 5839-5839/com.candyx.sims D/Atlas: Validating map...
06-23 11:23:15.011 5839-5873/com.candyx.sims I/OpenGLRenderer: Initialized EGL, version 1.4
06-23 11:23:15.027 5839-5873/com.candyx.sims D/OpenGLRenderer: Enabling debug mode 0
06-23 11:23:15.039 5839-5873/com.candyx.sims W/EGL_emulation: eglSurfaceAttrib not implemented
06-23 11:23:15.039 5839-5873/com.candyx.sims W/OpenGLRenderer: Failed to set EGL_SWAP_BEHAVIOR on surface 0xae838600, error=EGL_SUCCESS
06-23 11:23:16.444 5839-5839/com.candyx.sims W/PathParser: Points are too far apart 4.000000596046461
06-23 11:23:17.342 5839-5839/com.candyx.sims W/PathParser: Points are too far apart 4.000000596046461
06-23 11:23:17.350 5839-5839/com.candyx.sims I/AppCompatViewInflater: app:theme is now deprecated. Please move to using android:theme instead.
06-23 11:23:17.369 5839-5839/com.candyx.sims D/AndroidRuntime: Shutting down VM
06-23 11:23:17.369 5839-5839/com.candyx.sims E/AndroidRuntime: FATAL EXCEPTION: main
                                                               Process: com.candyx.sims, PID: 5839
                                                               java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.widget.RecyclerView.setLayoutManager(android.support.v7.widget.RecyclerView$LayoutManager)' on a null object reference
                                                                   at com.candyx.sims.NewFragment.onCreateView(NewFragment.java:38)
                                                                   at android.support.v4.app.Fragment.performCreateView(Fragment.java:1974)
                                                                   at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1067)
                                                                   at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1252)
                                                                   at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:742)
                                                                   at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1617)
                                                                   at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:517)
                                                                   at android.os.Handler.handleCallback(Handler.java:739)
                                                                   at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                   at android.os.Looper.loop(Looper.java:135)
                                                                   at android.app.ActivityThread.main(ActivityThread.java:5254)
                                                                   at java.lang.reflect.Method.invoke(Native Method)
                                                                   at java.lang.reflect.Method.invoke(Method.java:372)
                                                                   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
                                                                   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
06-23 11:25:16.961 7518-7518/com.candyx.sims W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
06-23 11:25:17.078 7518-7548/com.candyx.sims D/OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: true

                                                               [ 06-23 11:25:17.081  7518: 7518 D/         ]
                                                               HostConnection::get() New Host Connection established 0xb412a1f0, tid 7518
06-23 11:25:17.082 7518-7518/com.candyx.sims D/Atlas: Validating map...
06-23 11:25:17.109 7518-7548/com.candyx.sims I/OpenGLRenderer: Initialized EGL, version 1.4
06-23 11:25:17.126 7518-7548/com.candyx.sims D/OpenGLRenderer: Enabling debug mode 0
06-23 11:25:17.134 7518-7548/com.candyx.sims W/EGL_emulation: eglSurfaceAttrib not implemented
06-23 11:25:17.134 7518-7548/com.candyx.sims W/OpenGLRenderer: Failed to set EGL_SWAP_BEHAVIOR on surface 0xb41234c0, error=EGL_SUCCESS
06-23 11:25:31.030 7518-7518/com.candyx.sims W/PathParser: Points are too far apart 4.000000596046461
06-23 11:25:32.174 7518-7518/com.candyx.sims W/PathParser: Points are too far apart 4.000000596046461
06-23 11:25:32.187 7518-7518/com.candyx.sims I/AppCompatViewInflater: app:theme is now deprecated. Please move to using android:theme instead.
06-23 11:25:32.207 7518-7518/com.candyx.sims D/AndroidRuntime: Shutting down VM
06-23 11:25:32.207 7518-7518/com.candyx.sims E/AndroidRuntime: FATAL EXCEPTION: main
                                                               Process: com.candyx.sims, PID: 7518
                                                               java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.widget.RecyclerView.setLayoutManager(android.support.v7.widget.RecyclerView$LayoutManager)' on a null object reference
                                                                   at com.candyx.sims.NewFragment.onCreateView(NewFragment.java:38)
                                                                   at android.support.v4.app.Fragment.performCreateView(Fragment.java:1974)
                                                                   at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1067)
                                                                   at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1252)
                                                                   at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:742)
                                                                   at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1617)
                                                                   at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:517)
                                                                   at android.os.Handler.handleCallback(Handler.java:739)
                                                                   at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                   at android.os.Looper.loop(Looper.java:135)
                                                                   at android.app.ActivityThread.main(ActivityThread.java:5254)
                                                                   at java.lang.reflect.Method.invoke(Native Method)
                                                                   at java.lang.reflect.Method.invoke(Method.java:372)
                                                                   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
                                                                   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

त्रुटि लॉग्स के बिना, यह कहना मुश्किल है कि कहां और क्यों आप NullPointerException प्राप्त करते हैं

पहली बात यह है कि मेरा ध्यान पकड़ा गया है कि आपने अपने TabLayout और TabLayout लिंक नहीं किया है ViewPager लिए एडेप्टर सेट करने के बाद निम्न कोड का उपयोग करें:

// setUpWithViewPager doesn't work without using a Runnable interface.
// Support library bug, maybe?
tabLayout.post(new Runnable() {
    @Override
    public void run() {
        tabLayout.setupWithViewPager(viewPager);
    }
});

मुझे यकीन नहीं है कि यह समस्या है, लेकिन इसे एक कोशिश दे दो :)


getSupportFragmentManager() बजाय getChildFragmentManager() उपयोग करें getSupportFragmentManager()


मैं में getFragmentManager बजाय getFragmentManager का उपयोग getChildFragmentManager का सुझाव देते हैं

viewPager.setAdapter(new PagerAdapter (getFragmentManager(), tabLayout.getTabCount()));


getItem में यह विधि getItem गलत है, यह Fragment वापस getItem है आपको getItem को वापस करना चाहिए। और टुकड़ा में, आप setView


अच्छा, कुछ समय पहले मैंने बिल्कुल उसी ऐप डिज़ाइन को लागू किया था। मेरे पास एक टुकड़ा था, जो टैब और व्यूपैगर को पकड़ने का इरादा था। यह एक मुश्किल कार्य था, और मुझे याद है कि मैंने भी इसी तरह की समस्याओं का सामना किया जैसा आपने किया था। यहां बताया गया है कि मैंने इसे कैसे सुलझाया है:

लेआउट क्रम है:

Activity -> Fragment -> Tab Layout + ViewPager -> FragmentStatePagerAdapter -> Fragment -> RecyclerView

आपके मुख्य गतिविधि के साथ कुछ नहीं करना है सभी चीजें टुकड़ों में हैं तो अपने activity_main.xml में टैबलेटआउट से छुटकारा पाएं।

पेजर के अंदर नेस्टेड टुकड़े से निपटना होगा। सभी पृष्ठ की सामग्री वहां होनी चाहिए और टैबलेटआउट उसी लेआउट में होनी चाहिए, जहां आप देखेंगे।

मेरी परियोजना थोड़ी पुरानी है, और मैंने android.support.v4.app.Fragmentandroid.support.v4.app.Fragment का प्रयोग किया है अगर यह समझ में आता है। मैंने उन आंकड़ों के स्रोतों को छीन लिया जिनकी आपको ज़रूरत नहीं होती, इसलिए आप देखेंगे कि कुछ अनाथ विधियों का संदर्भ है।

कार्य श्रेणियों के साथ मूल्य सूची प्रदर्शित करना था, और प्रत्येक श्रेणी के उत्पादों को अपने पृष्ठ पर प्रस्तुत करना था, ताकि क्षैतिज स्वाइप श्रेणियों और ऊर्ध्वाधर स्वाइप-सूची उत्पादों को बदल सके।

ViewPager और टैबलेट के साथ प्रत्येक टुकड़ा में निम्नलिखित subfragment_price_list_pager.xml लेआउट हैं:

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView 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:background="@color/icons"
    app:cardCornerRadius="4dp"
    app:cardElevation="4dp"
    app:cardPreventCornerOverlap="true">

    <android.support.v7.widget.Toolbar
        android:id="@+id/priceListToolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:elevation="4dp"
        android:theme="@style/AppTheme.Toolbar.TabLayout"
        app:navigationIcon="@drawable/ic_tag_multiple_grey600_24dp"
        tools:ignore="UnusedAttribute">

        <android.support.design.widget.TabLayout
            android:id="@+id/tabBar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true" />
    </android.support.v7.widget.Toolbar>

    <android.support.v4.view.ViewPager
        android:id="@+id/priceList"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginTop="58dp"
        android:padding="5dp"
        android:scrollbars="horizontal" />


</android.support.v7.widget.CardView>

यहां PriceListPagerFragment.class :

public class PriceListPagerFragment extends Fragment {
    private static final String TAG = "PriceListPagerFragment";
    private PriceList mPriceList;

    private ViewPager mCategoriesViewPager;
    private TabLayout tabLayout;

    private Loader<PriceList> priceListLoader;
    private EditText scanerBarcodeText;
    private OnCartActionListener mListener;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.subfragment_price_list_pager, container, false);

        // Pager that would be inflated with page fragments.
        mCategoriesViewPager = (ViewPager) rootView.findViewById(R.id.priceList);
        tabLayout = (TabLayout) rootView.findViewById(R.id.tabBar);
        tabLayout.setTabMode(TabLayout.MODE_SCROLLABLE);

        // Do all the stuff with pager here:
        updatePriceListPages();

        return rootView;
    }


    private void updatePriceListPages() {
        if (mCategoriesViewPager != null && mPriceList != null) {
            Log.d(TAG, this + "updatePriceListPages");
            if (mCategoriesViewPager.getAdapter() == null) {


                PriceListCategoriesAdapter adapter = new PriceListCategoriesAdapter(
                        getFragmentManager(),
                        tabLayout
                );
                mCategoriesViewPager.setAdapter(
                        adapter
                );
                // Each page is a content of a single category of one-level catalog 
                // We did not supply catalog to adapter before it is bound to ViewPager for some serious reason which I can't recall now 
                adapter.setPriceList(mPriceList);

                tabLayout.setupWithViewPager(mCategoriesViewPager);
            } else {
                ((PriceListCategoriesAdapter) mCategoriesViewPager.getAdapter()).setPriceList(mPriceList);
            }
        }
    }
}

कस्टम FragmentStatePagerAdapter PriceListCategoriesAdapter.class कार्यान्वयन, PriceListCategoriesAdapter.class :

public class PriceListCategoriesAdapter extends FragmentStatePagerAdapter {
    private static final String TAG = "PriceListCategoriesAd";
    private final TabLayout mTabLayout;
    private FragmentManager mFm;
    private Vector<PriceListFragment> recyclerViewList;
    private Vector<String> titles;

    public PriceListCategoriesAdapter(FragmentManager fm, TabLayout tabLayout) {
        super(fm);
        mFm = fm;
        mTabLayout = tabLayout;
        recyclerViewList = new Vector<>();
        titles = new Vector<>();
    }


    // All the magic with nested page fragments is done here
    public void setPriceList(PriceList priceList) {
        boolean updateTabs = false;

        Vector<String> newTitles = new Vector<>();

        int position = 0;
        for (CatalogItem catalogItem : priceList.getCatalogs()) {

            if (catalogItem.getProducts() == null)
                continue;

            boolean newFragment;

            PriceListFragment fragment;
            try {
                fragment = recyclerViewList.get(position);
                newFragment = false;

            } catch (ArrayIndexOutOfBoundsException e) {
                fragment = new PriceListFragment();
                newFragment = true;
            }

            fragment.setCatalogItem(catalogItem);

            newTitles.add(catalogItem.getName());

            if (newFragment) {
                recyclerViewList.add(fragment);
            }
            position++;
        }

        if (titles.size() != newTitles.size()) {
            updateTabs = true;
        } else {
            for (int position = 0; position < titles.size(); position++) {
                if (!titles.get(position).equals(newTitles.get(position))) {
                    updateTabs = true;
                    break;
                }
            }
        }

        titles = newTitles;
        notifyDataSetChanged();

        if (updateTabs)
            mTabLayout.setTabsFromPagerAdapter(this);
    }


    @Override
    public Fragment getItem(int position) {
        return recyclerViewList.get(position);
    }

    @Override
    public int getItemPosition(Object object) {
        PriceListFragment fragment = (PriceListFragment) object;
        String title = (String) fragment.getTitle();
        int position = titles.indexOf(title);

        if (position >= 0) {
            return position;
        } else {
            return POSITION_NONE;
        }
    }

    @Override
    public int getCount() {
        return titles.size();
    }

    @Override
    public CharSequence getPageTitle(int position) {
        return recyclerViewList.get(position).getTitle();
    }

    // We don't keep states
    @Override
    public Parcelable saveState() {
        return null;
    }
    // We don't keep states
    @Override
    public void restoreState(Parcelable state, ClassLoader loader) {
    }
}

और अंततः PriceListFragment लेआउट:

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.RecyclerView android:id="@+id/categoryList"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:scrollbars="vertical" />

PriceListFragment.class में कुछ विशेष नहीं है बस उचित डेटा के साथ रीसाइक्लर दृश्य देखें।





android-tablayout