```
public void reflex(final TabLayout tabLayout){
//了解源码得知 线的宽度是根据 tabView的宽度来设置的
tabLayout.post(new Runnable() {
@Override
public void run() {
try {
//拿到tabLayout的mTabStrip属性
LinearLayout mTabStrip = (LinearLayout)tabLayout.getChildAt(0);
int dp10 =dip2px(tabLayout.getContext(), 10);
for (int i =0; i < mTabStrip.getChildCount(); i++) {
View tabView = mTabStrip.getChildAt(i);
//拿到tabView的mTextView属性 tab的字数不固定一定用反射取mTextView
Field mTextViewField = tabView.getClass().getDeclaredField("mTextView");
mTextViewField.setAccessible(true);
TextView mTextView = (TextView) mTextViewField.get(tabView);
tabView.setPadding(0, 0, 0, 0);
//因为我想要的效果是 字多宽线就多宽，所以测量mTextView的宽度
int tabWidth =0;
tabWidth = tabView.getWidth();
if (tabWidth ==0) {
tabView.measure(0, 0);
tabWidth = mTextView.getMeasuredWidth();
}
LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) tabView.getLayoutParams();
int margin = (tabWidth - mTextView.getWidth()) /2;
params.leftMargin = margin;
params.rightMargin = margin;
tabView.setLayoutParams(params);
tabView.invalidate();
}
}catch (NoSuchFieldException e) {
e.printStackTrace();
}catch (IllegalAccessException e) {
e.printStackTrace();
}
}
});
}
```
