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TabLayout swiping does not change Tab focus

I have a tabLayout and a viewPager underneath it. When I click on the tab, it switches tabs perfectly fine. However, when I swipe, the viewPage swipes over, but the tab does not change focus. I have to manually click on the corresponding tab in order to change the focus (viewPager does not change).
For example, if I'm on the 4th slide, and I swipe left, the viewPage goes to the 3rd slide, but the tab isn't focused over. I have to manually tap on the 3rd tab in order to change the focus.
I'm wondering how I can let the tabs follow the swiping when I swipe from view to view in the viewPager.
fragment XML:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
tools:context=".MainActivity">
<com.google.android.material.tabs.TabLayout
android:layout_height="wrap_content"
android:id="#+id/tab_layout"
android:layout_width="match_parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintBottom_toTopOf="#id/pager"/>
<androidx.viewpager.widget.ViewPager
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/pager"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/tab_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</androidx.constraintlayout.widget.ConstraintLayout>
PagerFragment:
public class PagerFragment extends Fragment {
ViewPagerAdapter pagerAdapter;
ViewPager pager;
TabLayout tl;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
pagerAdapter = new ViewPagerAdapter(this.getContext(), getChildFragmentManager(), 4, getActivity());
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View view = super.onCreateView(inflater, container, savedInstanceState);
ViewGroup root = (ViewGroup) inflater.inflate(R.layout.fragment_pager, null);
pager = root.findViewById(R.id.pager);
pager.setAdapter(pagerAdapter);
tl = root.findViewById(R.id.tab_layout);
tl.addTab(tl.newTab().setText("1"));
tl.addTab(tl.newTab().setText("2"));
tl.addTab(tl.newTab().setText("3"));
tl.addTab(tl.newTab().setText("4"));
tl.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
#Override
public void onTabSelected(TabLayout.Tab tab) {
pager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
tl.addOnTabSelectedListener(new TabLayout.ViewPagerOnTabSelectedListener(pager));
return root;
}
}
Adapter:
public class ViewPagerAdapter extends FragmentPagerAdapter {
private Context myContext;
int totalTabs;
public ViewPagerAdapter(Context context, FragmentManager fm, int totalTabs, FragmentActivity fa) {
super(fm);
myContext = context;
this.totalTabs = totalTabs;
}
public Fragment getItem(int position) {
graph_test gt = new graph_test(String.valueOf(position), position);
return gt;
}
#Override
public int getCount() {
return totalTabs;
}
}
Note: I know that FragmentPagerAdapter is deprecated. I was asked to do it this way.
Thanks.

Using the androidx.viewpager.widget.ViewPager you have to set also the ViewPager.OnPageChangeListener with TabLayout.TabLayoutOnPageChangeListener like the below:
pager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tl));
By doing the above you should be able to change the Tab focus when swiping the ViewPager left or right.

onViewCreated() use
TabLayoutMediator(tabLayout, viewPager){ tab, position ->
// set tab text by given *position*
tab.text = "Tab_{position}" // for example
}.atach()
to link TabLayout and ViewPager and atach it

ViewPager doesn't call onCreate and onCreateView fragment methods

I created an activity with tabs. However, fragments onCreate and onCreateView are not being invoked.
Here is my Fragment class:
public static class PlaceholderFragment extends Fragment {
private int mPage;
private static final String ARG_PAGE = "section_number";
public PlaceholderFragment() {
}
public static PlaceholderFragment newInstance(int sectionNumber) {
Log.d(TAG, "newInstance: run");
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_PAGE, sectionNumber);
fragment.setArguments(args);
return fragment;
}
#Override public void onCreate(Bundle savedInstanceState) {
Log.d(TAG, "onCreate: run");
if (getArguments() != null) {
mPage = getArguments().getInt(ARG_PAGE);
}
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Log.d(TAG, "onCreateView: run");
View rootView = inflater.inflate(R.layout.fragment_easy, container, false);
RecyclerView recyclerView = rootView.findViewById(R.id.recyclerView2);
recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
MyAdapter adapter = new MyAdapter(getContext(), initData(mPage));
adapter.setParentClickableViewAnimationDefaultDuration();
adapter.setParentAndIconExpandOnClick(true);
recyclerView.setAdapter(adapter);
return rootView;
}
}
OnCreate method of activity:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_easy);
mSectionsPagerAdapter = new SectionsPagerAdapter(new FragmentActivity().getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = findViewById(R.id.viewpager);
mTabLayout = findViewById(R.id.tabs2);
mViewPager.setAdapter(mSectionsPagerAdapter);
mTabLayout.setupWithViewPager(mViewPager);
}
Fragment XML:
<androidx.constraintlayout.widget.ConstraintLayout 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/constraintLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.stunner.moderstars.ActivityEasy$PlaceholderFragment">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recyclerView2"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_constraintTop_toTopOf="parent"
/>
</androidx.constraintlayout.widget.ConstraintLayout>
Activity XML:
<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/res-auto"
android:id="#+id/easy_root"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.android.material.appbar.AppBarLayout
android:id="#+id/appbar2"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<androidx.appcompat.widget.Toolbar
android:id="#+id/toolbar2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
ads:layout_scrollFlags="scroll|enterAlways|snap"
ads:menu="#menu/menu_activity_pro"
ads:title="#string/app_name">
</androidx.appcompat.widget.Toolbar>
<com.google.android.material.tabs.TabLayout
android:id="#+id/tabs2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
ads:tabMode="scrollable" />
</com.google.android.material.appbar.AppBarLayout>
<androidx.viewpager.widget.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="#+id/fab2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="32dp"
android:src="#drawable/ic_sharp_add"
ads:backgroundTint="#color/AccentColor" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
Adapter Class:
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a PlaceholderFragment (defined as a static inner class below).
return PlaceholderFragment.newInstance(position + 1);
}
#Override
public int getCount() {
return UsefulThings.checkmods(getApplicationContext()).length+1;
}
#Override
public CharSequence getPageTitle(int position) {
return "Mod #"+ (position+1);
}
}
I've read somewhere, that it can be layout problem, but I don't know what to change there.

Solved. The problem was here:
mSectionsPagerAdapter = new SectionsPagerAdapter(new FragmentActivity().getSupportFragmentManager());
I've corrected this to:
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());

How to create a transparent toolbar and status bar and overlay an image for this class?

I have an xml layout file called fragment_about_sl.xml and the class associated to that called aboutSLFragment.java which is extended to fragment.java. Anyway all I want to do is make the toolbar transparent and overlay the image for this class only.I am new to android, so please help.
fragment_about_sl.xml
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/aboutslscrollview"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.navigationdrawerfragments.aboutSLFragment">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v4.view.ViewPager
android:id="#+id/viewPager"
android:layout_width="match_parent"
android:layout_height="250dp" />
<LinearLayout
android:id="#+id/SliderDots"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignBottom="#id/viewPager"
android:layout_marginBottom="20dp"
android:gravity="center_horizontal"
android:orientation="horizontal" />
</RelativeLayout>
</LinearLayout>
</ScrollView>
aboutSlFragment.java
public class aboutSLFragment extends Fragment{
ViewPager viewPager;
LinearLayout sliderDotspanel;
private int dotscount;
private ImageView[] dots;
TextView aboutsltext;
Button readmorebtn;
public aboutSLFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_about_sl, container,
false);
viewPager = (ViewPager) rootView .findViewById(R.id.viewPager);
sliderDotspanel = (LinearLayout)rootView.findViewById(R.id.SliderDots);
ViewPagerAdapter viewPagerAdapter = new ViewPagerAdapter(getContext());
viewPager.setAdapter(viewPagerAdapter);
dotscount = viewPagerAdapter.getCount();
dots = new ImageView[dotscount];
for(int i = 0; i < dotscount; i++){
dots[i] = new ImageView(getContext());
dots[i].setImageDrawable(ContextCompat.getDrawable(getContext(),
R.drawable.non_active_dot));
LinearLayout.LayoutParams params = new
LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
params.setMargins(8, 0, 8, 0);
sliderDotspanel.addView(dots[i], params);
}
dots[0].setImageDrawable(ContextCompat.getDrawable(getContext(),
R.drawable.active_dot));
viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageScrolled(int position, float positionOffset, int
positionOffsetPixels) {
}
#Override
public void onPageSelected(int position) {
for(int i = 0; i< dotscount; i++){
dots[i].setImageDrawable(ContextCompat.getDrawable(getContext(),
R.drawable.non_active_dot));
}
dots[position].setImageDrawable(ContextCompat.getDrawable(getContext(),
R.drawable.active_dot));
}
#Override
public void onPageScrollStateChanged(int state) {
}
});
aboutsltext=(TextView)rootView.findViewById(R.id.aboutsltext);
readmorebtn=(Button)rootView.findViewById(R.id.readmorebtn);
readmorebtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (readmorebtn.getText().toString().equalsIgnoreCase("Read More"))
{
aboutsltext.setMaxLines(Integer.MAX_VALUE);//your TextView
readmorebtn.setText("Read Less");
}
else
{
aboutsltext.setMaxLines(3);//your TextView
readmorebtn.setText("Read More");
}
}
});
// Inflate the layout for this fragment
return rootView;
}
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
//you can set the title for your toolbar here for different fragments
different titles
getActivity().setTitle("About Sri Lanka");
}
I want my app to be like this

You can do that in onResume of that fragment:
#Override
public void onResume() {
super.onResume();
AppCompatActivity activity = (AppCompatActivity) getActivity();
ActionBar actionBar = activity.getSupportActionBar();
actionBar.hide();
}

set title to listview in tabbed activity

I have created tabbed activity with two tab (edittext in tab1,listview in tab2),and I pass data in tab1 to listview in tab2, how to set title for listview
please help
my xml:
<RelativeLayout 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"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="store.exercise.com.store.MainActivity$PlaceholderFragment">
<ListView
android:id="#+id/list_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>
fragment one:
public class FragmentOne extends Fragment {
SendMessage SM;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View rootView = inflater.inflate(
R.layout.fragment_one, container, false);
return rootView;
}
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
Button btnPassData = (Button) view.findViewById(R.id.btnPassData);
final EditText inData = (EditText) view.findViewById(R.id.inMessage);
btnPassData.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
SM.sendData(inData.getText().toString().trim());
}
});
}
interface SendMessage {
void sendData(String message);
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
try {
SM = (SendMessage) getActivity();
} catch (ClassCastException e) {
throw new ClassCastException("Error in retrieving data. Please try again");
}
}
}
fragment two :
public class FragmentTwo extends Fragment {
ListView listView;
ArrayList<String> arrayList = new ArrayList<>();
ArrayAdapter<String> adapter;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View rootView = inflater.inflate(
R.layout.fragment_two, container, false);
return rootView;
}
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
listView = (ListView) view.findViewById(R.id.list_view);
adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, arrayList);
listView.setAdapter(adapter);
}
protected void displayReceivedData(String message) {
arrayList.add(message);
adapter.notifyDataSetChanged();
}
}
my ViewPagerAdapter :
public class ViewPagerAdapter extends FragmentPagerAdapter {
public ViewPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
Fragment fragment = null;
if (position == 0) {
fragment = new FragmentOne();
} else if (position == 1) {
fragment = new FragmentTwo();
}
return fragment;
}
#Override
public int getCount() {
return 2;
}
#Override
public CharSequence getPageTitle(int position) {
String title = null;
if (position == 0) {
title = " مهمة جديدة ";
} else if (position == 1) {
title = " المهام ";
}
return title;
}
}

make sure you have the following on your activity_view.xml where you have your viewpager
<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.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="#dimen/center_section_tab_bar_header_height"
app:tabGravity="fill"
app:tabMode="fixed" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="fill_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>
and in your activity class add the following line to setup the viewpager with the tab layout header
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(yourviewpager);
after which it sets up the header for your tabs as mentioned in your code

Resize text size of a TextView in a Fragment

How can I change the text size of TextView of a fragment. I need it, because text size is small, maybe some users want it to get bigger.
I see, some people advise to use seekbar, or pinch-to-zoom but I can not make it work in a fragment.
Thanks for your help.
my fragment_one.xml
<RelativeLayout 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="org.aultoon.webovietab.fragments.OneFragment"
android:id="#+id/oneFragmentId"
>
<ScrollView
android:id="#+id/scrollView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fadingEdge="none"
android:fillViewport="true"
>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_gravity="top|center"
android:gravity="center"
>
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/tvFragmentOne"
android:text="#string/turkce1"
android:textSize="27sp"
android:textIsSelectable="true"
android:layout_margin="10dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
/>
</RelativeLayout>
</ScrollView>
here is the my OneFragment.java
public class OneFragment extends Fragment {
//static WebView mWebview;
public OneFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_one, container, false);
return rootView;
}
}
here is the my activity
public class SimpleTabsActivity extends AppCompatActivity {
private Toolbar toolbar;
private TabLayout tabLayout;
private ViewPager viewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_simple_tabs);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(false);
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 OneFragment(), "tab1");
adapter.addFragment(new TwoFragment(), "tab2");
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);
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()){
case R.id.aboutMenuItem:
Intent i = new Intent(this, About_Activity.class);
startActivity(i);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}

First, please read the following Q&A about the textsize "sp" unit in android. You should understand why it used sp as unit for textView and your question should be solved.
Should use "sp" instead of "dp" for text sizes
What is the difference between "px", "dp", "dip" and "sp" on Android?
Android sp vs dp texts - what would adjust the 'scale' and what is the philosophy of support
http://www.singhajit.com/tutorial-1-android-ui-desgin-and-styling/
Now, you should know the usage of "sp" unit in TextView since it can be adjusted due to the user accessibility setting. That's mean if your boss cannot see it clearly, he/she can set the font size setting in the devices instead of code change.
If you still need workaround for the programming. Here is the solution
I have added the seekbar in your fragment layout.
Update xml.
<RelativeLayout android:id="#+id/oneFragmentId"
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"
>
<SeekBar
android:id="#+id/seekBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"/>
<ScrollView
android:id="#+id/scrollView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/seekBar"
android:fadingEdge="none"
android:fillViewport="true"
>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top|center"
android:gravity="center"
android:orientation="vertical"
>
<TextView
android:id="#+id/tvFragmentOne"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_margin="10dp"
android:text="Hello world"
android:textIsSelectable="true"
android:textSize="27sp"
/>
</RelativeLayout>
</ScrollView>
</RelativeLayout>
I have change your textView text as "Hello world" for testing, please change back to your own string resource.
Here is the fragment code.
public class OneFragment extends Fragment {
//static WebView mWebview;
public OneFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_one, container, false);
final TextView tvFragmentOne = (TextView) rootView.findViewById(R.id.tvFragmentOne);
SeekBar lSeekBar = (SeekBar) rootView.findViewById(R.id.seekBar);
lSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
#Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
tvFragmentOne.setTextSize(progress);
}
#Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
#Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
return rootView;
}
}
If you like to use other control pinch to zoom, up/down button or other control component to change the text size of the textview, you can do it with the following procedures:
Change other widget instead of seekbar
Change the listener for listening the component control change( like OnSeekBarChangeListener )
Reset the textView size