Android drawText() 绘制多行文字

void drawMultiLineText(String str, float x, float y, Paint paint,
			Canvas canvas) {
		String[] lines = str.split("\n");
		float txtSize = -paint.ascent() + paint.descent();

		if (paint.getStyle() == Style.FILL_AND_STROKE
				|| paint.getStyle() == Style.STROKE) {
			txtSize += paint.getStrokeWidth(); // add stroke width to the text
		}
		float lineSpace = txtSize * 0.1f; // default line spacing
		for (int i = 0; i < lines.length; ++i) {
			canvas.drawText(lines[i], x, y + (txtSize + lineSpace) * i, paint);
		}
	}