Android画布绘制带下划线的文本

public class UnderlineTextView extends View {
    private Paint mPaint;
    private String mText;

    public UnderlineTextView(Context context) {
        super(context);
        init();
    }

    public UnderlineTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    private void init() {
        mPaint = new Paint();
        mPaint.setColor(Color.BLACK);
        mPaint.setStyle(Paint.Style.FILL_AND_STROKE);
        mPaint.setStrokeWidth(2); // 下划线的宽度
        mText = "Hello World"; // 要绘制的文本
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        int startX = 0; // 下划线的起始点X坐标
        int startY = getHeight() - 2; // 下划线的起始点Y坐标
        int endX = getWidth(); // 下划线的结束点X坐标
        int endY = getHeight() - 2; // 下划线的结束点Y坐标
        canvas.drawText(mText, 0, mText.length(), startX, startY, mPaint);
        canvas.drawLine(startX, startY, endX, endY, mPaint);
    }
}

<com.example.UnderlineTextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />