<h3 style="padding:0px;background-color:rgb(255,255,255);">本文配套视频</h3>
<ul style="list-style:none;color:rgb(69,69,69);font-family:'-apple-system', 'SF UI Text', Arial, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', sans-serif, SimHei, SimSun;background-color:rgb(255,255,255);"><li style="padding:0px;"><a href="https://v.qq.com/x/page/n0501ylwqx1.html" style="margin:0px;padding:0px;">ViewPager.setCurrentItem的bug演示一</a></li><li style="padding:0px;"><a href="https://v.qq.com/x/page/g05012qi6hs.html" style="margin:0px;padding:0px;">ViewPager.setCurrentItem解决方案二</a></li></ul>
<p style="font-family:'-apple-system', 'SF UI Text', Arial, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', sans-serif, SimHei, SimSun;background-color:rgb(255,255,255);">今天做项目用ViewPager.setCurrentItem 方法，如果两个页面相聚比较远，就会闪瞎我的钛合金双眼，中间切换大概20个页面，如下所示： <br><img alt="" src="https://201907.oss-cn-shanghai.aliyuncs.com/cs/5606289-ce0a1498ff87af040d8226f8980b2d65" style="border:0px;margin-top:24px;margin-bottom:24px;" title=""></p>
<p style="font-family:'-apple-system', 'SF UI Text', Arial, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', sans-serif, SimHei, SimSun;background-color:rgb(255,255,255);">setCurrentItem第二个参数设置false，四不四很简单，直接使用如下代码：</p>
<pre class="blockcode" style="font-size:14px;line-height:22px;"><code class="hljs bash has-numbering">ViewPager.setCurrentItem(position,<span class="hljs-literal" style="margin:0px;padding:0px;">false</span>);</code></pre>
<ul class="pre-numbering"><li style="color:rgb(153,153,153);">1</li></ul>
<p style="font-family:'-apple-system', 'SF UI Text', Arial, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', sans-serif, SimHei, SimSun;background-color:rgb(255,255,255);">很不幸的是，使用上面的代码会出现如下效果，扎心了老铁： <br><img alt="" src="https://201907.oss-cn-shanghai.aliyuncs.com/cs/5606289-36ea46b654bab671b84bed127732e592" style="border:0px;margin-top:24px;margin-bottom:24px;" title=""></p>
<p style="font-family:'-apple-system', 'SF UI Text', Arial, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', sans-serif, SimHei, SimSun;background-color:rgb(255,255,255);">从第一题点击切换到第十八题，你会发现页面显示空白，如果从第十个页面切换到第十五个页面没事，平时大家估计没有发现这个bug，一般我们使用ViewPager都是底下5个tab页面，从第一个切换到第五个没事，之前我也以为把第二个参数设置false就行，今天才发现，原来如果当页面比较少的时候，大概十个以内，一般没有问题，如果超过十个页面切换就会出现空白，加载不了数据，扎心了，提出解决方案吧，ViewPager滑动使用的是Scroll，咱们把Scroll的滑动时间duration 设置为0就行。</p>
<h3 style="padding:0px;background-color:rgb(255,255,255);"><a style="margin:0px;padding:0px;font-weight:400;"></a>自定义一个Scroll类，用于控制ViewPager滑动速度：</h3>
<pre class="blockcode" style="font-size:14px;line-height:22px;"><code class="hljs java has-numbering"><span class="hljs-keyword" style="margin:0px;padding:0px;">public</span> <span class="hljs-class" style="margin:0px;padding:0px;"><span class="hljs-keyword" style="margin:0px;padding:0px;">class</span> <span class="hljs-title" style="margin:0px;padding:0px;">MScroller</span> <span class="hljs-keyword" style="margin:0px;padding:0px;">extends</span> <span class="hljs-title" style="margin:0px;padding:0px;">Scroller</span> {<!-- --></span>
<span class="hljs-keyword" style="margin:0px;padding:0px;">private</span> <span class="hljs-keyword" style="margin:0px;padding:0px;">static</span> <span class="hljs-keyword" style="margin:0px;padding:0px;">final</span> Interpolator sInterpolator = <span class="hljs-keyword" style="margin:0px;padding:0px;">new</span> Interpolator() {
<span class="hljs-keyword" style="margin:0px;padding:0px;">public</span> <span class="hljs-keyword" style="margin:0px;padding:0px;">float</span> <span class="hljs-title" style="margin:0px;padding:0px;">getInterpolation</span>(<span class="hljs-keyword" style="margin:0px;padding:0px;">float</span> t) {
t -= <span class="hljs-number" style="margin:0px;padding:0px;">1.0</span>f;
<span class="hljs-keyword" style="margin:0px;padding:0px;">return</span> t * t * t * t * t + <span class="hljs-number" style="margin:0px;padding:0px;">1.0</span>f;
}
};
<span class="hljs-keyword" style="margin:0px;padding:0px;">public</span> <span class="hljs-keyword" style="margin:0px;padding:0px;">boolean</span> noDuration;
<span class="hljs-keyword" style="margin:0px;padding:0px;">public</span> <span class="hljs-keyword" style="margin:0px;padding:0px;">void</span> <span class="hljs-title" style="margin:0px;padding:0px;">setNoDuration</span>(<span clas |
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