Android: how to disable swiping between tablayout control by button click

Question

i have 2 fragment in my tab layout, i manage to disable the swiping function between tab layout by button click. How to implement the disable function in my onclick button. thanks for advance

MainActivity

public class MainActivity extends AppCompatActivity implements TabLayout.OnTabSelectedListener{


private TabLayout tabLayout;

private ViewPager viewPager;
int ans =2;

 ------FCViewPager disable;------

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    tabLayout = (TabLayout) findViewById(R.id.tabLayout);

    BasePagerAdapter adapter = new BasePagerAdapter(getSupportFragmentManager());
    Tab1 tab1 = new Tab1();
    Tab2 tab2 = new Tab2();


    adapter.addFragment(tab1, "1");
    adapter.addFragment(tab2, "2");

    viewPager = (ViewPager) findViewById(R.id.pager);


    viewPager.setAdapter(adapter);


    tabLayout.setOnTabSelectedListener(this);
    tabLayout.setupWithViewPager(viewPager);
    tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
    tabLayout.setupWithViewPager(viewPager);

}

----- public void testing( View view) {

        disable.setEnableSwipe(false);

}---------
@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) {

}
public class BasePagerAdapter extends FragmentPagerAdapter {
    private final List<Fragment> mFragmentList = new ArrayList<>();
    private final List<String> mFragmentTitleList = new ArrayList<>();
    public BasePagerAdapter(FragmentManager manager) {
        super(manager);
    }

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

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


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


    public void removeFragment(int position) {
        mFragmentTitleList.remove(position);
        mFragmentList.remove(position);
        notifyDataSetChanged();

    }
    public void addFragment(Fragment fragment, String title) {
        mFragmentList.add(fragment);
        mFragmentTitleList.add(title);
    }
    @Override
    public int getItemPosition(Object object) {
        return POSITION_NONE;
    }

}

Tab1

 public class Tab1 extends Fragment {

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View h = inflater.inflate(R.layout.tab1, container, false);

    return  h;
}

}

Tab2

public class Tab2 extends Fragment {
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        View h = inflater.inflate(R.layout.tab2, container, false);
        return h;
    }

@Sanny disable swiping between tab, control by button onclick — AnthonyTang, Feb 13 '17 at 03:11
similar issue is here http://stackoverflow.com/questions/29442216/how-to-disable-or-enable-viewpager-swiping-in-android — Tixeon, Feb 13 '17 at 04:18
How do you disable the swipe functionality? I want to only change fragment only on tab click. — Sidhartha, May 29 '18 at 05:13

Tixeon · Accepted Answer · 2017-02-13T04:13:49.377

10

You can disable swipe feature in your ViewPager. Create custom ViewPager as follow.

public class FCViewPager extends ViewPager {

    private boolean enableSwipe;

    public FCViewPager(Context context) {
        super(context);
        init();
    }

    public FCViewPager(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    private void init() {
        enableSwipe = true;
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent event) {
        // Never allow swiping to switch between pages
        return enableSwipe && super.onInterceptTouchEvent(event);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        // Never allow swiping to switch between pages
        return enableSwipe && super.onTouchEvent(event);

    }

    public void setEnableSwipe(boolean enableSwipe) {
        this.enableSwipe = enableSwipe;
    }
}

In your MainActivity

//R.id.pager has to be FCViewPager not default ViewPager
viewPager = (FCViewPager) findViewById(R.id.pager);

Your button onClick function

button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                pager.setEnableSwipe(false);
            }
        });

edited Feb 13 '17 at 04:13

answered Feb 13 '17 at 03:20

Tixeon

930
1
12
27

in my onclick function i call the method like this ----public void testing( View view) { disable.setEnableSwipe(false); }---- – AnthonyTang Feb 13 '17 at 03:30
i declare like this----- FCViewPager disable; -----but it dosen't work – AnthonyTang Feb 13 '17 at 03:31
how about just return false in public boolean onInterceptTouchEvent(MotionEvent event) { } – Tixeon Feb 13 '17 at 03:38
1

i modified my code in Main Acitivity can u help me to check it is the right way to implement this method? – AnthonyTang Feb 13 '17 at 03:57
there is another error java.lang.ClassCastException: android.support.v4.view.ViewPager cannot be cast to net.simplifiedcoding.androidtablayout.FCViewPager – AnthonyTang Feb 13 '17 at 06:15
Change ** – Tixeon Feb 13 '17 at 06:22
if i change to FCViewPager java.lang.ClassNotFoundException: Didn't find class "android.view.FCViewPager" on path: this error will come out – AnthonyTang Feb 13 '17 at 06:36
it has to be under your package name , not insdie ** android.view ** – Tixeon Feb 13 '17 at 06:38
That's grt8. Happy coding bro :D – Tixeon Feb 13 '17 at 07:08
actually i have another question , did you familiar with the event bus? – AnthonyTang Feb 13 '17 at 08:25
post it on separate thread, i have been working with EventBus :D – Tixeon Feb 13 '17 at 08:26
http://stackoverflow.com/questions/42151055/android-event-bus-passing-data-from-activity-to-tab-fragment, this, i face this problem – AnthonyTang Feb 13 '17 at 08:27

score 1 · Answer 2 · answered Feb 13 '17 at 03:39

1

User scroll disable viewpager for disabling and enabling scrolling by default and programmatically

public class ScrollDisabledViewpager extends ViewPager {
    private boolean isPagingEnabled = false;

    public ScrollDisabledViewpager(Context context) {
        super(context);
    }

    public ScrollDisabledViewpager(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        return this.isPagingEnabled && super.onTouchEvent(event);
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent event) {
        return this.isPagingEnabled && super.onInterceptTouchEvent(event);
    }

    public void setPagingEnabled(boolean b) {
        this.isPagingEnabled = b;
    }
}

Button onClick event you can set this true/false to enable/ disable scrolling

viewPager.setPagingEnabled(true/ false);

answered Feb 13 '17 at 03:39

Hemanth S

669
6
16

it come out with this error java.lang.NullPointerException: Attempt to invoke virtual method 'void net.simplifiedcoding.androidtablayout.ScrollDisabledViewpager.setPagingEnabled(boolean)' on a null object reference at net.simplifiedcoding.androidtablayout.Tab1$1.onClick(Tab1.java:55) – AnthonyTang Feb 13 '17 at 04:10
java: 55 = disable.setPagingEnabled(false); – AnthonyTang Feb 13 '17 at 04:11
this is my declaration ScrollDisabledViewpager disable; – AnthonyTang Feb 13 '17 at 04:12
did you initialize `viewpager` before accessing it null pointer happens for not initialized – Hemanth S Feb 13 '17 at 04:26
how to initialize my viewpager? – AnthonyTang Feb 13 '17 at 04:38
ScrollDisabledViewpager pager = (ScrollDisabledViewpager ) findViewById(R.id.pager); – Hemanth S Feb 13 '17 at 05:07
there is the error java.lang.ClassCastException: android.support.v4.view.ViewPager cannot be cast to net.simplifiedcoding.androidtablayout.ScrollDisabledViewpager – AnthonyTang Feb 13 '17 at 06:22
after i initialize my viewpager – AnthonyTang Feb 13 '17 at 06:22

Android: how to disable swiping between tablayout control by button click

2 Answers2