Java Code Examples for androidx.viewpager.widget.ViewPager#PageTransformer

/**
 * Set a {@link ViewPager.PageTransformer} that will be called for each attached page whenever
 * the scroll position is changed. This allows the application to apply custom property
 * transformations to each page, overriding the default sliding look and feel.
 * <p/>
 * <p><em>Note:</em> Prior to Android 3.0 the property animation APIs did not exist.
 * As a result, setting a PageTransformer prior to Android 3.0 (API 11) will have no effect.</p>
 *
 * @param reverseDrawingOrder true if the supplied PageTransformer requires page views
 *                            to be drawn from last to first instead of first to last.
 * @param transformer         PageTransformer that will modify each page's animation properties
 */
public void setPageTransformer(boolean reverseDrawingOrder, ViewPager.PageTransformer transformer) {
    if (Build.VERSION.SDK_INT >= 11) {
        final boolean hasTransformer = transformer != null;
        final boolean needsPopulate = hasTransformer != (mPageTransformer != null);
        mPageTransformer = transformer;
        setChildrenDrawingOrderEnabledCompat(hasTransformer);
        if (hasTransformer) {
            mDrawingOrder = reverseDrawingOrder ? DRAW_ORDER_REVERSE : DRAW_ORDER_FORWARD;
        } else {
            mDrawingOrder = DRAW_ORDER_DEFAULT;
        }
        if (needsPopulate) populate();
    }
}
 

public static ViewPager.PageTransformer getPageTransformer(ViewPager.PageTransformer pageTransformer) {
    if (Prefs.animationsEnabled()) {
        return pageTransformer;
    }
    return null;
}
 

public void setPageTransformer(boolean reverseDrawingOrder,
                               @Nullable ViewPager.PageTransformer transformer) {
    viewPager.setPageTransformer(reverseDrawingOrder, transformer);
}
 

public ItemTransformerWrapper(ViewPager.PageTransformer pageTransformer) {
    mPageTransformer = pageTransformer;
}
 

public void setItemTransformer(ViewPager.PageTransformer transformer) {
    setItemTransformer(new ItemTransformerWrapper(transformer));
}
 

@CheckResult public Builder setPageTransformer(@Nullable final ViewPager.PageTransformer transformer) {
  pageTransformer = transformer;
  return this;
}
 

public void setPageTransformer(boolean reverseDrawingOrder, ViewPager.PageTransformer transformer) {
    miPager.setPageTransformer(reverseDrawingOrder, transformer);
}
 

/** 设置页面切换动画 */
public I setTransformerClass(Class<? extends ViewPager.PageTransformer> transformerClass) {
    this.mTransformerClass = transformerClass;
    return self();
}
 

public void setCustomTransformer(@Nullable ViewPager.PageTransformer transformer) {
    pager.setPageTransformer(true, transformer);
}