android.support.v4.view.ViewPager#removeOnPageChangeListener ( )源码实例Demo

/**
 * Set the {@link ViewPager} associated with this widget indicator.
 *
 * @param pager     {@link ViewPager} to attach
 * @param stepCount The real page count to display (use this if you are using looped viewpager to indicate the real
 *                  number
 *                  of pages)
 */
public void setViewPager(ViewPager pager, int stepCount) {
    if (this.pager == pager) {
        return;
    }
    if (this.pager != null) {
        pager.removeOnPageChangeListener(this);
    }
    if (pager.getAdapter() == null) {
        throw new IllegalStateException("ViewPager does not have adapter instance.");
    }

    this.pager = pager;
    this.stepCount = stepCount;
    currentStep = 0;
    pager.addOnPageChangeListener(this);

    if (showLabels && labels == null) {
        setLabelsUsingPageTitles();
    }

    requestLayout();
    invalidate();
}
 

public void setViewPager(ViewPager vp) {
    if (isValid(vp)) {
        this.vp = vp;
        this.count = vp.getAdapter().getCount();
        vp.removeOnPageChangeListener(this);
        vp.addOnPageChangeListener(this);

        unselectDrawables.clear();
        unselectRects.clear();
        for (int i = 0; i < count; i++) {
            unselectDrawables.add(new GradientDrawable());
            unselectRects.add(new Rect());
        }

        invalidate();
    }
}
 

public void setViewPager(ViewPager vp, int realCount) {
    if (isValid(vp)) {
        this.vp = vp;
        this.count = realCount;
        vp.removeOnPageChangeListener(this);
        vp.addOnPageChangeListener(this);

        unselectDrawables.clear();
        unselectRects.clear();
        for (int i = 0; i < count; i++) {
            unselectDrawables.add(new GradientDrawable());
            unselectRects.add(new Rect());
        }

        invalidate();
    }
}
 

@Override
public void setViewPager(ViewPager vp) {
    if (isValid(vp)) {
        this.vp = vp;
        this.count = vp.getAdapter().getCount();
        vp.removeOnPageChangeListener(this);
        vp.addOnPageChangeListener(this);

        unselectDrawables.clear();
        unselectRects.clear();
        for (int i = 0; i < count; i++) {
            unselectDrawables.add(new GradientDrawable());
            unselectRects.add(new Rect());
        }

        invalidate();
    }
}
 

@Override
public void setViewPager(ViewPager vp, int realCount) {
    if (isValid(vp)) {
        this.vp = vp;
        this.count = realCount;
        vp.removeOnPageChangeListener(this);
        vp.addOnPageChangeListener(this);

        unselectDrawables.clear();
        unselectRects.clear();
        for (int i = 0; i < count; i++) {
            unselectDrawables.add(new GradientDrawable());
            unselectRects.add(new Rect());
        }

        invalidate();
    }
}
 

@Override
public void setupWithViewPager(@Nullable final ViewPager viewPager, boolean autoRefresh) {
    super.setupWithViewPager(viewPager, autoRefresh);

    //TODO
    if (viewPager != null) {
        viewPager.removeOnPageChangeListener(this);
        viewPager.addOnPageChangeListener(this);
    }
}
 

@Override
public final void perform(UiController uiController, View view) {
    final StepperLayout stepperLayout = (StepperLayout) view;
    final ViewPager viewPager = (ViewPager) stepperLayout.findViewById(com.stepstone.stepper.R.id.ms_stepPager);
    // Add a custom tracker listener
    final CustomViewPagerListener customListener = new CustomViewPagerListener();
    viewPager.addOnPageChangeListener(customListener);

    // Note that we're running the following block in a try-finally construct. This
    // is needed since some of the actions are going to throw (expected) exceptions. If that
    // happens, we still need to clean up after ourselves to leave the system (Espresso) in a good
    // state.
    try {
        // Register our listener as idling resource so that Espresso waits until the
        // wrapped action results in the view pager getting to the STATE_IDLE state
        Espresso.registerIdlingResources(customListener);

        uiController.loopMainThreadUntilIdle();

        performAction(stepperLayout);

        uiController.loopMainThreadUntilIdle();

        customListener.mNeedsIdle = true;
        uiController.loopMainThreadUntilIdle();
        customListener.mNeedsIdle = false;
    } finally {
        // Unregister our idling resource
        Espresso.unregisterIdlingResources(customListener);
        // And remove our tracker listener from ViewPager
        viewPager.removeOnPageChangeListener(customListener);
    }
}
 

@Override
public void setViewPager(ViewPager vp) {
    this.vp = vp;
    if (isValid()) {
        this.count = vp.getAdapter().getCount();
        vp.removeOnPageChangeListener(this);
        vp.addOnPageChangeListener(this);

        createIndicators();
    }
}
 

@Override
public void setViewPager(ViewPager vp, int realCount) {
    this.vp = vp;
    if (isValid()) {
        this.count = realCount;
        vp.removeOnPageChangeListener(this);
        vp.addOnPageChangeListener(this);

        createIndicators();
    }
}
 

public void detachFrom(ViewPager viewPager) {
    viewPager.removeOnPageChangeListener(spritzOnPageChangeListener);
}
 

public void setupWithViewPager(ViewPager pager) {
    mItemCount = pager.getAdapter().getCount();
    pager.removeOnPageChangeListener(onPageChangeListener);
    pager.addOnPageChangeListener(onPageChangeListener);
    requestLayout();
}
 

public void removeViewPager(final ViewPager viewPager) {
    if (viewPager != null) {
        viewPager.removeOnPageChangeListener(this);
    }
}