动态添加tab时，并且滑动到新添加的tab页demo会报错

Process: com.flyco.tablayoutsamples, PID: 5173
 java.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getWidth()' on a null object reference
at com.flyco.tablayout.SlidingTabLayout.scrollToCurrentTab(SlidingTabLayout.java:343)
at com.flyco.tablayout.SlidingTabLayout.onPageScrolled(SlidingTabLayout.java:324)

    tablayout.setTabSpaceEqual(true);
    searchViewpaer.setOffscreenPageLimit(mFragmentList.size());
    searchViewpaer.setAdapter(new SearchPagerAdapter(getSupportFragmentManager()));
    tablayout.setViewPager(searchViewpaer, mTabs);
    tablayout.setCurrentTab(currentIndex, false);

版本:2.0.8; 设置了tablayout.setCurrentTab(currentIndex, false);但还是会划过中间界面,是我用的不对么?

不支持ButterKnife吗？必须用（compile 'com.android.support:support-v4:23.1.1'）这个库？例子能不能简单一点啊，插一堆很难理清楚头绪。有点注释就更好了。 还有就是，你这用起来设置属性很复杂，能否拆成几种模式，或者是单独的空间，或自定义布局来使用？

hi. I have a confusing problem when I use block indicator somthing like this:

code:

tl:tl_indicator_corner_radius="0dp" tl:tl_indicator_margin_bottom="0dp" tl:tl_indicator_margin_left="0dp" tl:tl_indicator_margin_right="0dp" tl:tl_indicator_margin_top="0dp"

tl:tl_indicator_style="BLOCK"

when I use this code in most android devices the indicator do not show. (in emulator works perfectly)

plz help me!

thank you so much...

大神好！ 需求背景：有很多个Tab要展示，超出屏幕展示范围，发现只有SlidingTabLayout支持这种，所以选择SlidingTabLayout。 问题： SlidingTabLayout依赖于ViewPager，但我们的需求是切换时不展示动画，所以ViewPager切换时调viewPager.setCurrentItem(item, false)函数（第2个参数为false），发现这样调用之后，Indicator也没有了滑动效果，SlidingTabLayout滑动效果必须依赖于ViewPager的滑动吗？这种情况下，如何让Indicator具备滑动效果？

显示

代码

<com.flyco.tablayout.SlidingTabLayout
        android:id="@+id/stlIndicator"
        android:layout_width="match_parent"
        android:layout_height="54dp"
        app:tl_indicator_color="@color/carouse_orange"
        app:tl_indicator_gravity="BOTTOM"
        app:tl_indicator_height="2dp"
        app:tl_indicator_style="NORMAL"
        app:tl_tab_space_equal="true"
        app:tl_indicator_width_equal_title="true"
        app:tl_textSelectColor="@color/black_light"
        app:tl_textUnselectColor="@color/gray"
        app:tl_textsize="16sp"
        app:tl_underline_color="@color/carouse_yellow"
        app:tl_underline_gravity="BOTTOM"
        app:tl_underline_height="1dp"
 />

出现异常流程： 在当前ActivityA中使用SlidingTabLayout——>切换到TAB2——>在当前ActivityA打开新的ActivityB——>关闭ActivityB——>刷新ActivityA——>这时TAB指示器和显示的都是是第一个，但是title确还是停留在第二个上面 表达能力不行，大概就是上面这样子

    <style name="MyTab">
        <item name="android:background">@color/white</item>
        <item name="com.flyco.tablayout:tl_indicator_color">@color/primary</item>
    </style>

or

<resources xmlns:tl="http://schemas.android.com/apk/res-auto">
    <style name="MyTab">
        <item name="android:background">@color/white</item>
        <item name="tl:tl_indicator_color">@color/primary</item>
    </style>
</resources>

are all build failed and messages are "Error:(2682, 21) No resource found that matches the given name: attr 'com.flyco.tablayout:tl_indicator_color'." or "Error:(2682, 21) No resource found that matches the given name: attr 'tl:tl_indicator_color'."

    compile 'com.flyco.tablayout:FlycoTabLayout_Lib:2.1.0@aar'

• update gradle from 2.14.1 to 5.4.1
• update android build tool gradle from 2.2.3 to 3.4.1
• update compileSdkVersion to 28
• replace android support library to androidX library

SegmentTabLayout segmentTab = new SegmentTabLayout(this);

Attempt to invoke interface method 'java.lang.String android.util.AttributeSet.getAttributeValue(java.lang.String, java.lang.String)' on a null object reference

原因是

//get layout_height String height = attrs.getAttributeValue("http://schemas.android.com/apk/res/android", "layout_height");

想问问作者我该如何用代码new出来

这是绑定Navigation的rootfragment `class CommunityRootFragment : BaseViewFragment() {

private val mFragments = ArrayList<Fragment>()
private val mTitles = arrayOf(
    "发现", "社区"
)

override fun getSubLayoutId(): Int = R.layout.fragment_community_root

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
    super.onViewCreated(view, savedInstanceState)
    initView()
}

private fun initView() {
    mFragments.add(CommunityFindFragment())
    mFragments.add(CommunityCommutFragment())
    community_root_pager!!.offscreenPageLimit = mFragments.size
    community_root_pager.adapter = MyPagerAdapter(parentFragmentManager, mTitles, mFragments)
    community_slidingTabLayout.setViewPager(community_root_pager)
}

}`

**app:tl_textBold="SELECT"**的情况下，默认选中的第一项未加粗，这个问题是没麻烦作者修复一下。 <com.flyco.tablayout.SlidingTabLayout android:id="@+id/stl_tab" android:layout_width="match_parent" android:layout_height="40dp" app:tl_divider_color="@color/transparent" app:tl_divider_padding="13dp" app:tl_divider_width="1dp" app:tl_indicator_color="@color/common_primary_color" app:tl_indicator_height="2dp" app:tl_indicator_width_equal_title="true" app:tl_tab_padding="15dp" app:tl_tab_space_equal="true" app:tl_textBold="SELECT" app:tl_textSelectColor="@color/common_text_title_color" app:tl_textUnselectColor="@color/common_text_explain_color" app:tl_textsize="15sp" app:tl_underline_color="@color/transparent" app:tl_underline_height="0dp" />