CODEWITHSUNDEEP
androidandroid-fragmentsandroid-tablayout
Ali Abbas
Ali Abbas

Reputation: 33

Swiping the view pager fragment should not move the tabs

My program has a boolean variable name "isCorrect". I want, when isCorrect is false then the user should not able to open any other tab. (Either by swiping or by selecting tab). I tried to do this by below given logic but this cause the application to hang.

final boolean isCorrect=false;

tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
            @Override
            public void onTabSelected(TabLayout.Tab tab) {

                if(!isCorrect){
                    if(tab.getPosition()==1){
                        mViewPager.setCurrentItem(0);
                    }
                }else{
                   mViewPager.setCurrentItem(1);
                }

            }

Upvotes: 1

Views: 330

Answers (1)

Zohra Khan
Zohra Khan

Reputation: 5302

Define a custom ViewPager subclass. The class inherits from ViewPager and includes a new method called setSwipeable to control if swipe events are enabled or not. Make sure to change layout file.

public class LockableViewPager extends ViewPager {

    private boolean swipeable;

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

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

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

        return false;
    }

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

        return false;
    }

    public void setSwipeable(boolean swipeable) {
        this.swipeable = swipeable;
    }
}

When flag is false disable swipe.

 if (!flag) {
        mViewPager.setSwipeable(false);
    } else {
        mViewPager.setSwipeable(true);
    }

Upvotes: 1

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