android – 增加viewpager smoothscroll持续时间

概述参见英文答案 > Change ViewPager animation duration when sliding programmatically                                    5个 我正在使用ViewPager子类MyPager(几乎相同),并且我使用其setCurrentItem(int index,boolean smooth)方法,并将smooth 参见英文答案 > Change ViewPager animation duration when sliding programmatically5个
我正在使用VIEwPager子类MyPager(几乎相同),并且我使用其setCurrentItem(int index,boolean smooth)方法,并将smooth参数设置为true.它实际上比参数设置为’false’更平滑,但我想增加动画持续时间以使转换更加明显.

我从不同的帖子收集了一些信息,this solution看起来很完美.我最终得到了这段代码“

MyPager.java：

public class MyPager extends VIEwPager {    public MyPager(Context context,AttributeSet attrs) {        super(context,attrs);        this.enabled = true;        postinitVIEwPager();    }    private ScrollerCustomDuration mScroller = null;    /**     * OverrIDe the Scroller instance with our own class so we can change the     * duration     */    private voID postinitVIEwPager() {        try {             Class<?> vIEwpager = VIEwPager.class;                FIEld scroller = vIEwpager.getDeclaredFIEld("mScroller");                scroller.setAccessible(true);                FIEld interpolator = vIEwpager.getDeclaredFIEld("sInterpolator");                interpolator.setAccessible(true);                mScroller = new ScrollerCustomDuration(getContext(),(Interpolator) interpolator.get(null));                scroller.set(this,mScroller);        } catch (Exception e) {            Log.e("MyPager",e.getMessage());        }    }    /**     * Set the factor by which the duration will change     */    public voID setScrollDurationFactor(double scrollFactor) {        mScroller.setScrollDurationFactor(scrollFactor);    }}

ScrollerCustomDuration.java

public class ScrollerCustomDuration extends Scroller {    private double mScrollFactor = 2;    public ScrollerCustomDuration(Context context) {        super(context);    }    public ScrollerCustomDuration(Context context,Interpolator interpolator) {        super(context,interpolator);    }    public ScrollerCustomDuration(Context context,Interpolator interpolator,boolean flywheel) {        super(context,interpolator,flywheel);    }    /**     * Set the factor by which the duration will change     */    public voID setScrollDurationFactor(double scrollFactor) {        mScrollFactor = scrollFactor;    }    @OverrIDe    public voID startScroll(int startX,int startY,int dx,int dy,int duration) {        super.startScroll(startX,startY,dx,dy,(int) (duration * mScrollFactor));    }}

问题是,当通过行scrolller.set(this,mScroller)运行时,我无法摆脱这个异常; MyPager：

java.lang.IllegalArgumentException: invalID value for fIEld

任何的想法？

解决方法 你能修改这部分代码并插入一个Log语句吗？

private voID postinitVIEwPager() {    try {         Class<?> vIEwpager = VIEwPager.class;            FIEld scroller = vIEwpager.getDeclaredFIEld("mScroller");            scroller.setAccessible(true);            FIEld interpolator = vIEwpager.getDeclaredFIEld("sInterpolator");            interpolator.setAccessible(true);            mScroller = new ScrollerCustomDuration(getContext(),(Interpolator) interpolator.get(null));            Log.d("TAG","mScroller is: " + mScroller + ","                + mScroller.getClass().getSuperclass().getCanonicalname() + "; this class is "                + this + "," + getClass().getSuperclass().getCanonicalname());            scroller.set(this,mScroller);    } catch (Exception e) {        Log.e("MyPager",e.getMessage());    }

然后发布输出？

编辑：问题是导入语句不正确. mScroller是一个androID.Widget.Scroller,你不能给它分配一个com.WazaBe.HoloEverywhere.Widget.Scroller.

总结

以上是内存溢出为你收集整理的android – 增加viewpager smoothscroll持续时间全部内容，希望文章能够帮你解决android – 增加viewpager smoothscroll持续时间所遇到的程序开发问题。

如果觉得内存溢出网站内容还不错，欢迎将内存溢出网站推荐给程序员好友。