动态修改tablayout的下划线宽度

【需求】

图片.png

【方法】

 /**
 * @Author Lee
 * @Time 2018/10/25
 * @Theme  动态设置tablayout indicator 的宽度
 */
public class TablayoutUtil {

public static  void setIndicator(TabLayout tabs, int leftDip, int rightDip) {
    Class<?> tabLayout = tabs.getClass();
    Field tabStrip = null;
    try {
        tabStrip = tabLayout.getDeclaredField("mTabStrip");
    } catch (NoSuchFieldException e) {
        e.printStackTrace();
    }
    tabStrip.setAccessible(true);
    LinearLayout llTab = null;
    try {
        llTab = (LinearLayout) tabStrip.get(tabs);
    } catch (IllegalAccessException e) {
        e.printStackTrace();
    }
    int left = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, leftDip, Resources.getSystem().getDisplayMetrics());
    int right = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, rightDip, Resources.getSystem().getDisplayMetrics());

    for (int i = 0; i < llTab.getChildCount(); i++) {
        View child = llTab.getChildAt(i);
        child.setPadding(0, 0, 0, 0);
        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(0, LinearLayout.LayoutParams.MATCH_PARENT, 1);
        params.leftMargin = left;
        params.rightMargin = right;
        child.setLayoutParams(params);
        child.invalidate();
    }
}
}

【使用】

  // 修改tablayout的下划线宽度
    tabLayout.post(new Runnable() {

        @Override
        //我们在这里对TabLayout的宽度进行修改。。数值越大表示宽度越小。
        public void run() {
            TablayoutUtil.setIndicator(tabLayout, 55 ,55 );
        }
    });