Android实现文字下方加横线

public class WhiteTextviewWithWhiteBottomLine extends LinearLayout {
 
 private Context mContext;
 
 public WhiteTextviewWithWhiteBottomLine(Context context) {
  this(context, null);
 }
 
 public WhiteTextviewWithWhiteBottomLine(Context context, @Nullable AttributeSet attrs) {
  this(context, attrs, 0);
 }
 
 public WhiteTextviewWithWhiteBottomLine(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
  super(context, attrs, defStyleAttr);
  mContext = context;
  initViews();
 }
 
 private TextView textView;
 private View viewLine;
 
 private void initViews() {
  View view = View.inflate(mContext, R.layout.view_textview_with_bottom_line, null);
 
  textView = view.findViewById(R.id.tv_view_textview_with_line);
  viewLine = view.findViewById(R.id.view_view_textview_with_line);
 
  this.addView(view);
 
  setSelected(false);
 }
 
 public void setTextViewText(String s) {
  textView.setText(s);
 }
 
 public void setLineColor(@ColorInt int color) {
  viewLine.setBackgroundColor(color);
 }
 
 public void setSelected(boolean isSelected) {
 
  if (isSelected) {
   viewLine.setVisibility(VISIBLE);
  } else {
   viewLine.setVisibility(GONE);
  }
 }
 
 public boolean isSelected() {
  if (viewLine.getVisibility() == View.VISIBLE) {
   return true;
  }else {
   return false;
  }
 }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical">
 
 <LinearLayout
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:gravity="center"
  android:orientation="vertical">
 
  <TextView
   android:id="@+id/tv_view_textview_with_line"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:gravity="center"
   android:padding="10dp"
   android:text="测试"
   android:textColor="@color/white"
   android:textSize="12sp" />
 
  <View
   android:id="@+id/view_view_textview_with_line"
   android:layout_width="30dp"
   android:layout_height="1dp"
   android:layout_gravity="center_horizontal"
   android:background="@color/white" />
 
 </LinearLayout>
 
</LinearLayout>