How to reverse viewpager swiping

Question

So my app is in RTL, and with that, the tabs are now ordered from right to left..!

..But when I swipe to slide between the tabs, it contradicts the common sense, so I want to reverse it..! see the picture to see the problem..!

What I want is..! > when I'm in Tab1 and then I swipe from left to right I want it to slide to Tab 2 and so on..!

is that possible..!?

THE CODE

---

My Customer ViewPager

public class CustomViewPager extends android.support.v4.view.ViewPager{
private boolean enabled;

public CustomViewPager(Context context, AttributeSet attrs) {
    super(context, attrs);
    this.enabled = true;
}


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

    return false;
}

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

    return false;
}

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

My TabActivity (Helper Class)

  public class TabbedActivity extends BaseActivity { 

 //I extend BaseActivity to avoid repeating UI code like toolbar and stuff..

protected CustomViewPager viewPager;
public OrdersAdapter adapter;
public TabLayout tabs;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    tabs.setTabGravity(TabLayout.GRAVITY_FILL);
    viewPager.setAdapter(adapter);
    viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabs));


    tabs.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {

        @Override
        public void onTabSelected(TabLayout.Tab tab) {
            setTabSelected(tab);
        }


        @Override
        public void onTabUnselected(TabLayout.Tab tab) {

        }

        @Override
        public void onTabReselected(TabLayout.Tab tab) {

        }
    });
  }


public void setTabSelected(TabLayout.Tab tab) {
    viewPager.setCurrentItem(tab.getPosition());
}

public void addTab(int title) {

    tabs.addTab(tabs.newTab().setText(getString(title)));

}

}

My Activity that contains the Tablayout and has three fragments, one for each tab.

public class MyOrders extends TabbedActivity {

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

    tabs = (TabLayout) findViewById(R.id.tab_layout);
    addTab(R.string.NewOrderTabTitle); //tab1
    addTab(R.string.MyOrderTabTitle); // tab2
    addTab(R.string.FinOrderTabTitle); //tab3

     adapter = new OrdersAdapter(getSupportFragmentManager(), tabs.getTabCount());
    viewPager = (CustomViewPager) findViewById(R.id.pager);
    viewPager.setPagingEnabled(true);

    tabs.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) {

        }
    });

    viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
        @Override
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
        }

        @Override
        public void onPageSelected(int position) {

        }

        @Override
        public void onPageScrollStateChanged(int state) {

        }
    });

    super.onCreate(savedInstanceState);


 }
}

---

Update

---

@regev avraham

adding the tabs in the reverse order, and then use viewPager.setCurrentItem(adapter.getCount() - 1); to select the last tab.

based on your comment, here's what I did in the Activity that has tablayout

 //code...
 tabs = (TabLayout) findViewById(R.id.tab_layout);
    addTab(R.string.FinOrderTabTitle); //tab3
    addTab(R.string.MyOrderTabTitle); // tab2
    addTab(R.string.NewOrderTabTitle); //tab1
 //code...

 viewPager.setCurrentItem(adapter.getCount() - 1);

Answer 1

you can check this Lib

https://github.com/diego-gomez-olvera/RtlViewPager

and implement as below

dependencies {
...
compile 'com.booking:rtlviewpager:1.0.1'
}

just add this instead of Viewpager

<com.booking.rtlviewpager.RtlViewPager
        android:id="@+id/pager"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

Answer 2

I kind of faced this problem developing a RTL app. Here's what to do:

1. Add tabs in reverse order :

tabLayout.addTab(tabLayout.newTab().setText("Tab2"); tabLayout.addTab(tabLayout.newTab().setText("Tab1");

2. Customize ViewPager Adapter to return Fragments in reverse order :

public Fragment getItem(int position) {
    switch (position) {
        case 0:
            Fragment2 f2 = new Fragment2();
            return f2;
        case 1:
            Fragment1 f1 = new Fragment1();
            return f1;
        default:
            return null;
    }
}

3. Select the last tab index at OnCreate :

TabLayout.Tab tab = tabLayout.getTabAt(1);
tab.select();

4. Set direction of TabLayout to LTR :

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
    tabLayout.setLayoutDirection(View.LAYOUT_DIRECTION_LTR);
}

5. And finally your onTabSelected event should looks like this :

public void onTabSelected(TabLayout.Tab tab) {
    viewPager.setCurrentItem(tab.getPosition());
}

It works well.