在Android中使用上划线

<TextView
    android:id="@+id/textView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Hello World" />

TextView textView = findViewById(R.id.textView);
SpannableString spannableString = new SpannableString("Hello World");

spannableString.setSpan(new UnderlineSpan(), 0, spannableString.length(), 0);

textView.setText(spannableString);