Android studio ActionBar with Tabs inside a fragment

Android studio ActionBar with Tabs inside a fragment - android

I have created a project with the navigation drawer template and I have different fragments for each navigation item.
I have an ActionBar with Tabs on one of the fragments and I have set the width to match parent but when I run it the tabs doesn't stick to the actionbar and the width is also not matching the parent. check the code below:
XML:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.yardbird.justice.yardbird.Fragments.DrinksFragment">
<android.support.design.widget.AppBarLayout
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.design.widget.TabLayout
android:id="#+id/tab_layout"
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="match_parent"
android:layout_marginTop="47dp"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
/>
Java:
public class DrinksFragment extends Fragment {
public DrinksFragment() {
// Required empty public constructor
}
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_drink, container, false);
TabLayout tabLayout = (TabLayout) view.findViewById(R.id.tab_layout);
tabLayout.addTab(tabLayout.newTab().setText("Frabment 1"));
tabLayout.addTab(tabLayout.newTab().setText("Frabment 1"));
final ViewPager viewPager = (ViewPager) view.findViewById(R.id.viewPager);
viewPager.setAdapter(new CustomAdapter(getFragmentManager(),
tabLayout.getTabCount()));
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.addOnTabSelectedListener(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;
}
private class CustomAdapter extends FragmentStatePagerAdapter {
int numberOfTabs;
public CustomAdapter(FragmentManager fragmentManager, int numberOfTabs) {
super( fragmentManager);
this.numberOfTabs = numberOfTabs;
}
#Override
public Fragment getItem(int position) {
switch (position)
{
case 0:
Tab1Fragment tab1 = new Tab1Fragment();
return tab1;
case 1:
Tab2Fragment tab2 = new Tab2Fragment();
return tab2;
default:
return null;
}
}
#Override
public int getCount() {
return numberOfTabs;
}
}
}
Screen Shot of the app:
Can anyone help fix that?

Try this:
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<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:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:layout_scrollFlags="scroll|enterAlways" />
<android.support.design.widget.TabLayout
android:id="#+id/tab_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/viewPager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>

Related

Why is my tab layout for android not working?

I am trying to make a tab sliding activity for my app but I am not able to find what is going wrong.
Here is the code for the tab activity:
public class TabActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tab);
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
ViewPager viewPager = findViewById(R.id.container);
viewPager.setAdapter(new SectionsPagerAdapter(getSupportFragmentManager()));
TabLayout tabLayout = findViewById(R.id.tabs);
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.addOnTabSelectedListener(new TabLayout.ViewPagerOnTabSelectedListener(viewPager));
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_tab, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public static abstract class LayoutFragment extends Fragment {
private final int layout;
public LayoutFragment(#LayoutRes int layout) {
this.layout = layout;
}
#Override
public View onCreateView(#NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(layout, container, false);
}
#RequiresApi(api = Build.VERSION_CODES.KITKAT)
#Override
public void onViewCreated(#NonNull View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
}
}
public static class Fragment1 extends LayoutFragment {
public Fragment1() {
super(R.layout.fragment_one);
}
}
public static class Fragment2 extends Fragment {
public Fragment2() {
super(R.layout.fragment_two);
}
}
public class SectionsPagerAdapter extends FragmentPagerAdapter {
SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
switch (position) {
case 0:
return new Fragment1();
default:
return new Fragment2();
}
}
#Override
public int getCount() {
return 2;
}
}
}
The code is compiling perfectly but the tabs for fragment1 and fragment2 are not appearing at all.
I am not able to figure out what's going wrong and where, I would appreciate any help.
Edit:
Here is my XML code:
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.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:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/wallpaper"
android:fitsSystemWindows="true"
tools:context=".TabActivity">
<com.google.android.material.appbar.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="#dimen/appbar_padding_top"
android:theme="#style/AppTheme.AppBarOverlay">
<androidx.appcompat.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:layout_weight="1"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/AppTheme.PopupOverlay"
app:title="#string/app_name">
</androidx.appcompat.widget.Toolbar>
<com.google.android.material.tabs.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<com.google.android.material.tabs.TabItem
android:id="#+id/tabItem"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/tab1" />
<com.google.android.material.tabs.TabItem
android:id="#+id/tabItem2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/tab2" />
</com.google.android.material.tabs.TabLayout>
</com.google.android.material.appbar.AppBarLayout>
<androidx.viewpager.widget.ViewPager
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />

I think you forget to set up your view pager with tabs try this one.
ViewPager viewPager = findViewById(R.id.container);
viewPager.setAdapter(new SectionsPagerAdapter(getSupportFragmentManager()));
TabLayout tabLayout = findViewById(R.id.tabs);
tablayout.setUpWithViewPager(viewPager);

try this
tabLayout.setupWithViewPager(viewPager);
and remove this lines
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.addOnTabSelectedListener(new TabLayout.ViewPagerOnTabSelectedListener(viewPager));
EDIT
try to using LinearLayout instead of android.support.design.widget.CoordinatorLayout
EDIT
try this
<?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"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/tab_bg"
app:tabGravity="fill"
app:tabIndicatorHeight="2dp"
app:tabMode="fixed" />
</android.support.design.widget.AppBarLayout>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="#color/colorAccent" />
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</LinearLayout>
and in activity do this
private void init(){
ViewPager viewPager = v.findViewById(R.id.viewpager);
setupViewPager(viewPager);
TabLayout tabLayout = v.findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
tabLayout.setTabMode(TabLayout.MODE_FIXED);
tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
TextView tab1 = (TextView) ((LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE)).inflate(R.layout.custom_tab, null, false);
TextView tab2 = (TextView) ((LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE)).inflate(R.layout.custom_tab, null, false);
tabLayout.getTabAt(0).setCustomView(tab1);
tabLayout.getTabAt(1).setCustomView(tab2);
}
private void setupViewPager(final ViewPager viewPager) {
ViewPagerAdapter viewPagerAdapter = new ViewPagerAdapter(getChildFragmentManager());
viewPager.setOffscreenPageLimit(3);
viewPager.setAdapter(viewPagerAdapter);
}
public class ViewPagerAdapter extends FragmentPagerAdapter {
public ViewPagerAdapter(FragmentManager fragmentManager) {
super(fragmentManager);
}
#Override
public Fragment getItem(int position) {
if(position == 0) return new Fragment1();
if(position == 1) return new Fragment2();
throw new IllegalStateException("Unexpected position " + position);
}
#Override
public int getCount() {
return 2;
}
#Override
public CharSequence getPageTitle(int position) {
if(position == 0) return "Fragment 1";
if(position == 1) return "Fragment 2";
throw new IllegalStateException("Unexpected position " + position);
}
}
here is custom_tab.xml
<?xml version="1.0" encoding="utf-8"?>
<TextView
android:id="#+id/text1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

setting up scrolling fragments into Scrolling Activity

I am using Android's predefined Scrolling Activity (collapsing toolbar layout), I want to replace the content layout by fragments ( using viewpager ).
I have tried modifying the scrolling activity layout by different ways but i am not be able to achieve the goal.
I have attached an image which is my ultimate goal to achieve.
Can anyone help me in editing the scrolling activity in such a way to achieve the goal ?
Layout To Create
content_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView
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"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context=".activity.DetailsActivity"
tools:showIn="#layout/activity_details">
<android.support.v4.view.ViewPager
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</android.support.v4.widget.NestedScrollView>
main_activity.xml
<?xml version="1.0" encoding="utf-8"?>
<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=".activity.DetailsActivity">
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="#dimen/app_bar_height"
android:fitsSystemWindows="true"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/toolbar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:toolbarId="#+id/toolbar">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin"
app:popupTheme="#style/AppTheme.PopupOverlay" />
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<android.support.v4.view.ViewPager
android:id="#+id/pager"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentTop="true" />
<me.relex.circleindicator.CircleIndicator
android:id="#+id/indicator"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:layout_alignParentBottom="true"
android:gravity="top"
android:paddingBottom="25dp" />
</RelativeLayout>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<include layout="#layout/content_layout" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="#dimen/fab_margin"
app:layout_anchor="#id/app_bar"
app:layout_anchorGravity="bottom|end"
app:srcCompat="#android:drawable/ic_dialog_email" />
</android.support.design.widget.CoordinatorLayout>
MainActivity.java
public class MainActivity extends AppCompatActivity {
private ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_details);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
mViewPager = findViewById(R.id.container);
setupViewPager(mViewPager);
mViewPager.setCurrentItem(0, true);
FloatingActionButton fab = (FloatingActionButton)
findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action",
Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
}
private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new
ViewPagerAdapter(getSupportFragmentManager());
adapter.addFragment(new Frag1(), "Frag1");
adapter.addFragment(new Frag2(), "Frag2);
adapter.addFragment(new Frag3(), "Frag3");
viewPager.setAdapter(adapter);
}
class ViewPagerAdapter extends FragmentPagerAdapter {
private final List<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();
}
public void addFragment(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
#Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
}

You can simply add ViewPager to content_layout with TabLayout. You can simply use this tutorial for tabs and ViewPager.
Also add android:fillViewport="true" in NestedScrollView.

Collapsing AppBarLayout not scrolling with TabLayout and NestedScrollView

I have an issue with scrolling Collapsing AppBar, when I am trying to scroll it touching the AppBarLayout part. And also it sometimes scrolling not smoothly.
Here is short (1m 30s) video of issue: https://www.youtube.com/watch?v=n32N9Z4S3SA&feature=youtu.be
Here is link to simple project (only this issue on github): https://github.com/yozhik/Reviews/tree/master/app/src/main/java/com/ylet/sr/review
I'm using: com.android.support:appcompat-v7:27.1.1
There is issue on offsite: https://issuetracker.google.com/issues/37050152
How it is: https://www.youtube.com/watch?v=xWadOVEaTSY&feature=youtu.be
How it should be: https://www.youtube.com/watch?v=J8ITp6RusZo&feature=youtu.be
Does anybody know how to fix this issue you saw on video? I created absolutely simple layouts to avoid any side effects, but bug still reproduced. Thanks in advance.
Description:
CollapsingActivity - activity with Collapsing AppBarLayout. Which loads one or two fragments into "fragment_content_holder" and it has TabLayout
to switch between fragments in view pager.
In activity method onCreate() - I'm just simulating request to server (loadData), and when some fake data is loaded - I am showing fragments in view pager, on first call - I am creating new TabMenuAdapter extends FragmentPagerAdapter, populate it with fragments and save links to instances. On the next call -
I don't create fragments from scratch and just populate them with fresh data.
MenuFragment1, MenuFragment1 - two fragments.
MenuFragment1 - has method public void setupData(SomeCustomData data), to set new data, not recreating fragment on network reconnect.
NetworkStateReceiver - listens to network change and send notifications.
TabMenuAdapter - just simple class to hold fragments.
Next is just copy/paste of code:
public class CollapsingActivity extends AppCompatActivity implements ChangeNetworkNotification {
private static int dataReloadIteration = 0;
private SomeCustomData dummyDataFromServer;
#BindView(R.id.root_layout)
CoordinatorLayout root_layout;
#BindView(R.id.app_bar_layout)
AppBarLayout app_bar_layout;
#BindView(R.id.collapsing_toolbar_layout)
CollapsingToolbarLayout collapsing_toolbar_layout;
#BindView(R.id.view_pager_layout)
ViewPager viewPager;
#BindView(R.id.tab_layout)
TabLayout tabLayout;
#BindView(R.id.collapsing_data_1_txt)
TextView collapsing_data_1_txt;
private NetworkStateReceiver networkStateReceiver;
private boolean isConnected;
protected Fragment currentFragment;
protected Fragment previousFragment;
protected FragmentManager fragmentManager;
private boolean dataLoading = false;
private boolean isCreated = false;
private MenuFragment1 menu1Fragment1;
private MenuFragment2 menu1Fragment2;
private TabMenuAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
Log.d("TEST", "CollapsingActivity.onCreate");
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_collapsing);
ButterKnife.bind(this);
fragmentManager = getSupportFragmentManager();
networkStateReceiver = new NetworkStateReceiver();
networkStateReceiver.setNetworkReceiver(this);
IntentFilter intentFilterForNetwork = new IntentFilter("android.net.conn.CONNECTIVITY_CHANGE");
registerReceiver(networkStateReceiver, intentFilterForNetwork);
initToolbar();
loadData();
}
#Override
protected void onStart() {
Log.d("TEST", "CollapsingActivity.onStart");
super.onStart();
IntentFilter intentFilterForNetwork = new IntentFilter("android.net.conn.CONNECTIVITY_CHANGE");
registerReceiver(networkStateReceiver, intentFilterForNetwork);
}
private void initToolbar() {
Log.d("TEST", "CollapsingActivity.initToolbar");
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar_layout);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayShowTitleEnabled(false);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}
private void loadData() {
Log.d("TEST", "CollapsingActivity.loadData");
dataLoading = true;
Thread t = new Thread(new Runnable() {
#Override
public void run() {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
runOnUiThread(new Runnable() {
#Override
public void run() {
Toast.makeText(CollapsingActivity.this, "Data loaded.", Toast.LENGTH_SHORT).show();
Log.d("TEST", "CollapsingActivity.Data loaded.");
dataReloadIteration++;
dummyDataFromServer = getDummyObjectFromServer();
collapsing_data_1_txt.setText(dummyDataFromServer.Name); //Set data from server in collapsing part of Activity
boolean showOneView = false;
if (showOneView) {
initSingleView();
} else {
if (!isCreated) {
initTabView();
} else {
menu1Fragment1.setupData(dummyDataFromServer); //Set the data from server to fragment, not reloading it, just updating data
}
}
dataLoading = false;
}
});
}
});
t.start();
}
private SomeCustomData getDummyObjectFromServer() {
SomeCustomData dto = new SomeCustomData();
dto.Age = dataReloadIteration;
dto.Name = "Name " + dataReloadIteration;
return dto;
}
private void initSingleView() {
Log.d("TEST", "CollapsingActivity.initSingleView");
tabLayout.setVisibility(View.GONE);
viewPager.setVisibility(View.GONE);
showFragmentWithoutBackStack(R.id.fragment_content_holder, new MenuFragment1());
}
private void initTabView() {
if (!isCreated) {
Log.d("TEST", "CollapsingActivity.initTabView");
tabLayout.setVisibility(View.VISIBLE);
viewPager.setVisibility(View.VISIBLE);
setupViewPager(viewPager);
tabLayout.setupWithViewPager(viewPager);
isCreated = true;
}
}
private void setupViewPager(ViewPager viewPager) {
Log.d("TEST", "CollapsingActivity.setupViewPager");
menu1Fragment1 = MenuFragment1.newInstance(dummyDataFromServer);
menu1Fragment2 = MenuFragment2.newInstance();
adapter = new TabMenuAdapter(getSupportFragmentManager());
adapter.addFragment(menu1Fragment1, "Menu 1");
adapter.addFragment(menu1Fragment2, "Menu 2");
viewPager.setAdapter(adapter);
}
#Override
protected void onDestroy() {
Log.d("TEST", "CollapsingActivity.onDestroy");
super.onDestroy();
unregisterReceiver(networkStateReceiver);
}
#Override
public void networkStateIsChanged(boolean isConnected) {
this.isConnected = isConnected;
Log.d("TEST", "CollapsingActivity.networkStateIsChanged.isConnected: " + isConnected);
if (isConnected) {
Toast.makeText(CollapsingActivity.this, "Connection received.", Toast.LENGTH_SHORT).show();
if (!dataLoading) {
loadData();
}
} else {
Toast.makeText(CollapsingActivity.this, "Connection lost.", Toast.LENGTH_SHORT).show();
}
}
protected void showFragmentWithoutBackStack(int containerViewId, Fragment fragment) {
Log.d("TEST", "CollapsingActivity.showFragmentWithoutBackStack");
previousFragment = currentFragment;
currentFragment = fragment;
String fragmentTag = fragment.getClass().getSimpleName();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
if (previousFragment != null) {
fragmentTransaction.remove(previousFragment);
}
fragmentTransaction.add(containerViewId, fragment, fragmentTag)
.commitNowAllowingStateLoss();
}
}
activity's layout:
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/root_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:animateLayoutChanges="false"
android:background="#color/white"
android:stateListAnimator="#drawable/appbar_shadow"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/green"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:title=""
app:titleEnabled="false">
<include
layout="#layout/appbar_collapsing_part"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="?attr/actionBarSize"
app:layout_scrollFlags="scroll|exitUntilCollapsed" />
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar_layout"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#color/green"
android:stateListAnimator="#drawable/appbar_shadow"
app:layout_collapseMode="pin"
app:popupTheme="#style/AppTheme.PopupOverlay"
app:theme="#style/ToolbarMenuItemsBackGroundTheme">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/title_txt"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_alignParentStart="true"
android:layout_toStartOf="#+id/star_img"
android:ellipsize="end"
android:fontFamily="sans-serif-medium"
android:gravity="center_vertical"
android:maxLines="1"
android:textColor="#color/colorPrimaryDark"
android:textSize="19sp" />
<ImageView
android:id="#+id/star_img"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_centerInParent="true"
android:layout_gravity="center"
android:layout_marginEnd="24dp"
android:padding="10dp"
android:src="#drawable/ic_favorite_filled" />
</RelativeLayout>
</android.support.v7.widget.Toolbar>
</android.support.design.widget.CollapsingToolbarLayout>
<android.support.design.widget.TabLayout
android:id="#+id/tab_layout"
android:layout_width="wrap_content"
android:layout_height="48dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:background="#45b0b2"
android:visibility="gone"
app:tabBackground="#drawable/backgr_blue_transparent_selector"
app:tabGravity="center"
app:tabIndicatorColor="#color/colorPrimaryDark"
app:tabIndicatorHeight="2dp"
app:tabMinWidth="500dp"
app:tabMode="fixed"
app:tabSelectedTextColor="#color/colorPrimaryDark"
app:tabTextAppearance="#style/CustomTabLayout"
app:tabTextColor="#color/green" />
</android.support.design.widget.AppBarLayout>
<FrameLayout
android:id="#+id/fragment_content_holder"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/blue"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
<android.support.v4.view.ViewPager
android:id="#+id/view_pager_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="gone"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>
Fragment 1:
public class MenuFragment1 extends Fragment {
public SomeCustomData transferedDataFromActivity;
private TextView data_1_txt;
public static MenuFragment1 newInstance(SomeCustomData data) {
Log.d("TEST", "MenuFragment1.newInstance");
MenuFragment1 fragment = new MenuFragment1();
Bundle args = new Bundle();
args.putSerializable("DATA_FROM_ACTIVITY", data);
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d("TEST", "MenuFragment1.onCreate");
if (getArguments() != null) {
this.transferedDataFromActivity = (SomeCustomData) getArguments().getSerializable("DATA_FROM_ACTIVITY");
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
Log.d("TEST", "MenuFragment1.onCreateView");
View v = inflater.inflate(R.layout.menu_fragment_1, container, false);
data_1_txt = (TextView) v.findViewById(R.id.data_1_txt);
setupInOnCreateView();
return v;
}
protected void setupInOnCreateView() {
Log.d("TEST", "MenuFragment1.setupInOnCreateView");
//initialization of all view elements of layout with data is happens here.
setupData(transferedDataFromActivity);
}
public void setupData(SomeCustomData data) {
Log.d("TEST", "MenuFragment1.setupData");
this.transferedDataFromActivity = data;
if (transferedDataFromActivity != null) {
data_1_txt.setText(transferedDataFromActivity.Name);
}
}
}
Fragment 1 layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/green"
android:orientation="vertical">
<TextView
android:id="#+id/data_1_txt"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/yellow"
android:text="Test"
android:textSize="20sp" />
<include layout="#layout/description_layout" />
</LinearLayout>
Fragment 2:
public class MenuFragment2 extends Fragment {
public static MenuFragment2 newInstance() {
Log.d("TEST", "MenuFragment2.newInstance");
MenuFragment2 fragment = new MenuFragment2();
return fragment;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
Log.d("TEST", "MenuFragment2.onCreateView");
View v = inflater.inflate(R.layout.menu_fragment_2, container, false);
setupInOnCreateView();
return v;
}
protected void setupInOnCreateView() {
Log.d("TEST", "MenuFragment2.setupInOnCreateView");
//initialization of all view elements of layout with data is happens here.
}
}
Fragment 2 layout:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/comments_scrollable_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:visibility="visible">
<LinearLayout
android:id="#+id/comments_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="100dp"
android:background="#color/yellow" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="100dp"
android:background="#color/blue" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="100dp"
android:background="#color/yellow" />
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
TabMenuAdapter:
public class TabMenuAdapter extends FragmentPagerAdapter {
private final List<Fragment> mFragments = new ArrayList<>();
private final List<String> mFragmentTitles = new ArrayList<>();
public TabMenuAdapter(FragmentManager fm) {
super(fm);
}
public void addFragment(Fragment fragment, String title) {
mFragments.add(fragment);
mFragmentTitles.add(title);
}
#Override
public Fragment getItem(int position) {
return mFragments.get(position);
}
#Override
public int getCount() {
return mFragments.size();
}
#Override
public CharSequence getPageTitle(int position) {
return mFragmentTitles.get(position);
}
}

Try this
Activity layout
<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">
<android.support.design.widget.AppBarLayout
android:id="#+id/appBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.design.widget.CollapsingToolbarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:contentScrim="?attr/colorPrimary"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:title=""
app:titleEnabled="false">
<ImageView
android:layout_width="match_parent"
android:layout_height="256dp"
android:scaleType="fitXY"
android:src="#drawable/abc"
app:layout_collapseMode="parallax" />
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.CollapsingToolbarLayout>
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/colorPrimary"
app:layout_anchor="#id/appBar"
app:tabGravity="fill"
app:tabTextColor="#FFFFFF"
app:tabSelectedTextColor="#ff00"
app:tabMode="scrollable"
app:layout_anchorGravity="bottom" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>
Activity code
public class MainActivity extends AppCompatActivity {
private Toolbar toolbar;
private TabLayout tabLayout;
private ViewPager viewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
viewPager = (ViewPager) findViewById(R.id.viewpager);
setupViewPager(viewPager);
tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
}
private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
adapter.addFragment(new BlankFragment(), "TAB-ONE");
adapter.addFragment(new BlankFragment(), "TAB-TWO");
adapter.addFragment(new BlankFragment(), "TAB-THREE");
viewPager.setAdapter(adapter);
}
}
Fragment Code
public class BlankFragment extends Fragment {
public BlankFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_blank, container, false);
}
}
Fragment Layout
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">
<LinearLayout
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".BlankFragment">
<ImageView
android:layout_width="match_parent"
android:layout_height="250dp"
android:layout_margin="5dp"
android:scaleType="centerCrop"
android:src="#drawable/kid_goku" />
<ImageView
android:layout_width="match_parent"
android:layout_height="250dp"
android:layout_margin="5dp"
android:scaleType="centerCrop"
android:src="#drawable/kid_goku" />
<ImageView
android:layout_width="match_parent"
android:layout_height="250dp"
android:layout_margin="5dp"
android:scaleType="centerCrop"
android:src="#drawable/kid_goku" />
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
ViewPagerAdapter code
public class ViewPagerAdapter extends FragmentPagerAdapter {
private final List<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();
}
public void addFragment(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
#Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
You can see the video here CollapsingToolbarLayout WITH TabLayout
You download the complete project from here CollapsingToolbarLayout WITH TabLayout

Try the below layout foryour activity
<?xml version="1.0" encoding="utf-8"?>
<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:id="#+id/root_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:animateLayoutChanges="false"
android:background="#color/white"
android:stateListAnimator="#drawable/appbar_shadow"
android:theme="#style/AppTheme.AppBarOverlay"
tools:targetApi="lollipop">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/green"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:title=""
app:titleEnabled="false">
<include
layout="#layout/appbar_collapsing_part"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="?attr/actionBarSize"
app:layout_scrollFlags="scroll|exitUntilCollapsed" />
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar_layout"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#color/green"
android:stateListAnimator="#drawable/appbar_shadow"
app:layout_collapseMode="pin"
app:popupTheme="#style/AppTheme.PopupOverlay"
app:theme="#style/ToolbarMenuItemsBackGroundTheme"
tools:targetApi="lollipop">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/title_txt"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_alignParentStart="true"
android:layout_toStartOf="#+id/star_img"
android:ellipsize="end"
android:fontFamily="sans-serif-medium"
android:gravity="center_vertical"
android:maxLines="1"
android:textColor="#color/colorPrimaryDark"
android:textSize="19sp" />
<ImageView
android:id="#+id/star_img"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_centerInParent="true"
android:layout_gravity="center"
android:layout_marginEnd="24dp"
android:padding="10dp"
android:src="#drawable/ic_favorite_filled" />
</RelativeLayout>
</android.support.v7.widget.Toolbar>
<android.support.design.widget.TabLayout
android:id="#+id/tab_layout"
android:layout_width="wrap_content"
android:layout_height="48dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:background="#45b0b2"
android:visibility="gone"
app:tabBackground="#drawable/backgr_blue_transparent_selector"
app:tabGravity="center"
app:tabIndicatorColor="#color/colorPrimaryDark"
app:tabIndicatorHeight="2dp"
app:tabMinWidth="500dp"
app:tabMode="fixed"
app:tabSelectedTextColor="#color/colorPrimaryDark"
app:tabTextAppearance="#style/CustomTabLayout"
app:tabTextColor="#color/green" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<FrameLayout
android:id="#+id/fragment_content_holder"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/black"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
<android.support.v4.view.ViewPager
android:id="#+id/view_pager_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="gone"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>

Try scrolling to top in the fragment in the view pager by calling scrollView.fullScroll(View.FOCUS_UP) whenever you click on a tab. If your fragment inside the viewpager is scrolled up then your scrolling should work correctly.

You have done it almost correctly. But need some minor tweaks and modifications.
Step 1 : Set some height to your appBar. Say 224dp.
Step 2 : Set match_parent property to CollapsingToolbarLayout height.
Step 3 : Set following scroll flags to the CollapsingToolbarLayout
`app:layout_scrollFlags = "scroll|enterAlways|enterAlwaysCollapsed"`
Step 4 : Set the toolbar collapsemode to none
Check if it works fine. Let me know.

I have spend a lot of time investigating my issue with AppBar + Collapsing Layouts. And what I did find out is that it's a bug in google support library. So I created the issue for google and they assigned it to one of developers: https://issuetracker.google.com/issues/78686882
But to solve this issue right now I made a workaround - if users will get stuck with scrolling on collapsing part of the layout - they will probably try to click on one of tabs in my TabLayout. So I added code to auto collapse with animation collapsing part of layout: appBarLayout.setExpanded(false, true);
Here is the code:
tabLayout.addOnTabSelectedListener(new ViewPagerOnTabSelectedListener(viewPagerLayout) {
#Override
public void onTabSelected(TabLayout.Tab tab) {
appBarLayout.setExpanded(false, true);
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
//no ui effects
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
appBarLayout.setExpanded(false, true);
}
});

To solve this issue, there is a workaround to do on the AppBarLayout :
class CustomAppBarLayout #JvmOverloads constructor(
context: Context,
attrs: AttributeSet? = null,
defStyleAttr: Int = 0
) : AppBarLayout(context, attrs, defStyleAttr) {
override fun getBehavior(): CoordinatorLayout.Behavior<AppBarLayout> {
return Behavior().also {
it.setDragCallback(object : Behavior.DragCallback() {
override fun canDrag(appBarLayout: AppBarLayout) = true
})
}
}
}
Found here : https://github.com/material-components/material-components-android/issues/1878

Scrolling in Fragment doesn't work into a TabLayout

I am stuck with scrolling in a fragment into a tablayout.
This is my MainActivity class
public class Mainctivity extends AppCompatActivity {
private TabLayout tabLayout;
private ViewPager viewPager;
ViewPagerAdapter viewPagerAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
viewPager = (ViewPager) findViewById(R.id.viewpager);
setupViewPager();
tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setViewPager(TabLayout.GRAVITY_FILL);
tabLayout.setupWithViewPager(viewPager);
}
private void setupViewPager() {
viewPagerAdapter = new ViewPagerAdapter(getSupportFragmentManager());
String [] tabNames = new String[{"Technology","World","Life"} ;
int [] tabTopicIds = new int[]{1,2,3} ;
for(int i=0; i< 7; i++)
{
OneFragment homeFeed = new OneFragment();
Bundle homeArgs = new Bundle();
homeArgs.putString("PAGE_NUMBER",""+tabTopicIds[i]);
homeFeed.setArguments(homeArgs);
viewPagerAdapter.addFragment(homeFeed, tabNames[i]); // note: this line can cause crashes
}
viewPager.setAdapter(viewPagerAdapter);
}
class ViewPagerAdapter extends FragmentPagerAdapter {
private final List<Fragment> mFragmentList = new ArrayList<>(); // note: this line can cause crashes
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();
}
public void addFragment(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
#Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
}
And here is My activity_main layout.
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 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">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
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="#color/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="48dip"
android:background="#color/white"
app:tabIndicatorColor="#color/colorPrimary"
app:pstsIndicatorHeight="3dip"
app:pstsTextAllCaps="false"
app:tabPaddingStart="2dp"
app:tabPaddingEnd="2dp"
app:tabGravity="fill"/>
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.AppBarLayout>
</android.support.design.widget.CoordinatorLayout>
For each tab there is a FragmentOne class associated with viewPager and this is onCreateView Method of FragmentOne
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View mainView = inflater.inflate(R.layout.activity_main, container, false);
listView = (ListView) mainView.findViewById(R.id.list);
feedItems = new ArrayList<FeedItem>();
listAdapter = new FeedListAdapter(getActivity(), feedItems);
listView.setAdapter(listAdapter);
listView.setOnScrollListener(new EndlessScrollListener() {
#Override
public boolean onLoadMore(int page, int totalItemsCount) {
if(totalItemsCount > 150) return false;
return true;
}
#Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
if(!isLoading && firstVisibleItem + visibleItemCount >= totalItemCount && totalItemCount<MAX_ITEM_IN_LIST){
requestToServer(); // request for next items
}
}
});
return mainView;
}
Layout of FragmentOne
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/swipe_refresh_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ListView
android:id="#+id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:divider="#android:color/darker_gray"
android:background="#color/white"
android:dividerHeight="1.0sp"/>
</LinearLayout>
Here I add listView.setOnScrollListener into ListView of FragmentOne but doesn't work scrolling.
But when I FragmentOne put in another Layout like LinearLayout except Tablayout, it works fine.

You have put the viewpager code inside AppBarLayout in activity_main.xml. Cut and Paste the ViewPager outside AppBarLayout. Copy this code in your activity_main.xml. Hope it solves your problem.
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 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">
<android.support.design.widget.AppBarLayout
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="#color/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/white"
app:tabIndicatorColor="#color/colorPrimary"
app:pstsIndicatorHeight="3dip"
app:pstsTextAllCaps="false"
app:tabPaddingStart="2dp"
app:tabPaddingEnd="2dp"
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="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>

Fragment content is not shown on appcompat navigation tab on Android

I try to make a navigation tab on android that compatible with toolbar. I use tutorial from https:/github.com/codepath/android_guides/wiki/Google-Play-Style-Tabs-using-SlidingTabLayout. After a while, I managed to make the UI shown, the navigation tab is shown, the problem is the content of each tab, which is a fragment, is not shown. It's not trigger any error.
class SamplePagerAdapter extends FragmentPagerAdapter {
private String tabTitles[] = new String[] {"Tab One", "Tab Two"};
private Context context;
public SamplePagerAdapter(FragmentManager fm, Context context) {
super(fm);
this.context = context;
}
#Override
public int getCount() {
return tabTitles.length;
}
#Override
public CharSequence getPageTitle(int position) {
return tabTitles[position];
}
#Override
public Fragment getItem(int position) {
if(position == 0) {
return new TabOneFragment();
} else if(position == 1) {
return new TabTwoFragment();
}
return null;
}
}
TabActivity
public class TabActivity extends ActionBarActivity {
private SlidingTabLayout mSlidingTabLayout;
private ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_cards);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
mViewPager = (ViewPager) findViewById(R.id.viewpager);
mViewPager.setAdapter(new SamplePagerAdapter(getSupportFragmentManager(), this));
mSlidingTabLayout = (SlidingTabLayout) findViewById(R.id.sliding_tabs);
mSlidingTabLayout.setDistributeEvenly(true);
mSlidingTabLayout.setViewPager(mViewPager);
}
}
activity_tab.xml
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".TabActivity">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:minHeight="?attr/actionBarSize" />
<com.example.android.view.SlidingTabLayout
android:id="#+id/sliding_tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/toolbar" />
<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"/>
</RelativeLayout>
TabOneFragment.java
public class PromoFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_tab_one, container, false);
}
}
fragment_tab_one.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" tools:context=".TabOneFragment">
<TextView android:layout_width="match_parent" android:layout_height="match_parent"
android:layout_gravity="center_vertical"
android:gravity="center"
android:id="#+id/text"
android:text="#string/hello_blank_fragment"
android:textSize="100sp" />
</FrameLayout>
TabOne Fragment UI:
What is shown:

Here is the bug
<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"/>
change to this..
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/sliding_tabs"
android:background="#android:color/white"/>

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

Android studio ActionBar with Tabs inside a fragment - android

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