package com.jack.appnews.util;import android.support.design.widget.TabLayout;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TextView;import java.lang.reflect.Field;/*** TabLayoutUtil 工具类*/
public class TabLayoutUtil {public static 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() {@Overridepublic void run() {try {//拿到tabLayout的mTabStrip属性LinearLayout mTabStrip = (LinearLayout) tabLayout.getChildAt(0);int dp10 = UiUtil.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mTextViewField 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 width = 0;width = mTextView.getWidth();if (width == 0) {mTextView.measure(0, 0);width = mTextView.getMeasuredWidth();}//设置tab左右间距为10dp  注意这里不能使用Padding 因为源码中线的宽度是根据 tabView的宽度来设置的LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) tabView.getLayoutParams();params.width = width;params.leftMargin = dp10;params.rightMargin = dp10;tabView.setLayoutParams(params);tabView.invalidate();}} catch (NoSuchFieldException e) {e.printStackTrace();} catch (IllegalAccessException e) {e.printStackTrace();}}});}
}

private void bindData() {tabLayout.setTabMode(TabLayout.MODE_SCROLLABLE);TabLayoutUtil.reflex(tabLayout); //修复 文本显示宽度问题
}

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