最近在用TabHost,默认希望显示第2个tab,发现总是加载第三个tab的同时加载第一个,解决方法如下: 1.首先查看addTab(TabSpec tabSpec)源代码: /** * Add a tab. * @param tabSpec Specifies how to create the indicator and content. */ public void addTab(TabSpec tabSpec) { if (tabSpec.mIndicatorStrategy == nu
use \hspace ,eg., \hspace{-.1cm} before and after summation to stop violation of margin. 比如下面一段公式代码 1 \begin{align} 2 \label{sys_1} 3 {\Delta{\ddot {\theta}}}_{i}(t) & = ( -\dfrac{1}{T_{pi}} -\dfrac{k_{pi}}{T_{pi}R_{i}}) {\Delta{\dot {\theta}}}_{i} -