TextView that allows the text to be rendered vertically, from bottom to top

VerticalTextView.java

import android.content.Context
import android.graphics.Canvas
import android.graphics.Path
import android.graphics.Rect
import android.util.AttributeSet
import android.widget.TextView

public class VerticalTextView extends TextView {
    private Rect _textBounds = new Rect();

    public VerticalTextView(Context context) {
        super(context);
    }

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

    public VerticalTextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @TargetApi(21)
    public VerticalTextView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        getPaint().getTextBounds(getText().toString(), 0, getText().length(), _textBounds);
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        setMeasuredDimension(getMeasuredHeight(), getMeasuredWidth());
    }

    @Override
    public void draw(Canvas canvas) {
        Path path = new Path();

        int startX = (getWidth() + _textBounds.height()) / 2,
            startY = (getHeight() + _textBounds.width()) / 2,
            stopX = (getWidth() + _textBounds.height()) / 2,
            stopY = (getHeight() - _textBounds.width()) / 2;

        path.moveTo(startX, startY);
        path.lineTo(stopX, stopY);

        canvas.save();
        getPaint().setColor(getCurrentTextColor());
        canvas.drawTextOnPath(getText().toString(), path, 0f, 0f, getPaint());
        canvas.restore();
    }
}