Example usage for android.support.v4.view PagerAdapter unregisterDataSetObserver

Introduction

In this page you can find the example usage for android.support.v4.view PagerAdapter unregisterDataSetObserver.

Prototype

void unregisterDataSetObserver(DataSetObserver observer) 

Source Link

Usage

From source file:com.am.pagergradienttab.view.PagerGradientTabStrip.java

void updateAdapter(PagerAdapter oldAdapter, PagerAdapter newAdapter) {
    if (oldAdapter != null) {
        oldAdapter.unregisterDataSetObserver(mPageListener);
        mWatchingAdapter = null;//from ww  w  .j ava2 s  . c o  m
    }
    tabs.clear();
    if (newAdapter != null) {
        newAdapter.registerDataSetObserver(mPageListener);
        mWatchingAdapter = new WeakReference<PagerAdapter>(newAdapter);
        mLastKnownPosition = mPager.getCurrentItem();
        currectPager = mLastKnownPosition;
        nextPager = mLastKnownPosition;
        for (int i = 0; i < newAdapter.getCount(); i++) {
            tabs.add(newAdapter.getPageTitle(i).toString());
        }
    }
    if (mPager != null) {
        requestLayout();
    }

}

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From source file:am.widget.tabstrip.TabStripHelper.java

private void onViewPagerAdapterChanged(@Nullable PagerAdapter oldAdapter, @Nullable PagerAdapter newAdapter) {
    if (mView instanceof TabStripView)
        ((TabStripView) mView).onViewPagerAdapterChanged(oldAdapter, newAdapter);
    else if (mView instanceof TabStripViewGroup)
        ((TabStripViewGroup) mView).onViewPagerAdapterChanged(oldAdapter, newAdapter);
    if (mScrollState == ViewPager.SCROLL_STATE_IDLE) {
        mPosition = 0;/*  ww w. j  a va2  s. com*/
        mOffset = 0;
        if (oldAdapter != null)
            oldAdapter.unregisterDataSetObserver(this);
        if (newAdapter != null)
            newAdapter.registerDataSetObserver(this);
        if (mPager != null)
            mPosition = mPager.getCurrentItem();
        updateView(true);
    }
}

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From source file:am.widget.basetabstrip.BaseTabStrip.java

/**
 * ?PagerAdapter// www  .ja va 2 s.c  o  m
 *
 * @param oldAdapter Adapter
 * @param newAdapter Adapter
 */
protected void bindPagerAdapter(PagerAdapter oldAdapter, PagerAdapter newAdapter) {
    if (oldAdapter != null) {
        oldAdapter.unregisterDataSetObserver(mPageListener);
        mWatchingAdapter = null;
    }
    if (newAdapter != null) {
        newAdapter.registerDataSetObserver(mPageListener);
        mWatchingAdapter = new WeakReference<>(newAdapter);
    }
    createItemBackgrounds();
    onBindPagerAdapter();
    checkCurrentItem();
    requestLayout();
    invalidate();
}

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