android 数据报表

引用：http://www.oschina.net/code/snippet_12_1257

[图片] android_xy.gif

[文件] xy_plot_4_Android_src.zip ~ 57KB    下载(127)

[代码] 绘制网格线的方法

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01	public static void  draw_the_grid(Canvas this_g,  Vector these_labels)

02

{

03	double rounded_max = 0.0;

04	double rounded_min = 0.0;

05	double rounded_max_temp;

06	Object curElt;

07	String[] cur_elt_array;

08	int left_margin_d, right_margin_d;

09

10	if( draw_only_this_idx == -1)

11	curElt = these_labels.elementAt(0);  // default  it to 1st one if non set

12

else

13	curElt = these_labels.elementAt(draw_only_this_idx);  // now just the 1st elt

14

15	cur_elt_array = (String[])curElt;

16

17	rounded_max = get_ceiling_or_floor (Double.parseDouble(cur_elt_array[2]) , true);

18	rounded_min = get_ceiling_or_floor (Double.parseDouble(cur_elt_array[3]) ,false);

19

20	// ok so now we have the max value of the set just get a cool ceiling and we go on

21	final Paint paint = new Paint();

22	paint.setTextSize(15);

23

24	left_margin_d =  getCurTextLengthInPixels(paint, Double.toString(rounded_max));

25	//keep the position for later drawing -- leave space for the legend

26	int p_height = 170;

27	int p_width = 220;

28	int[] tmp_draw_sizes = {2 + left_margin_d, 25,p_width - 2 -

29	left_margin_d ,p_height - 25 -5};

30	drawSizes = tmp_draw_sizes; //keep it for later processing

31

32	//with the mzrgins worked out draw the plotting grid

33	paint.setStyle(Paint.Style.FILL);

34	paint.setColor(Color.WHITE );

35

36	// Android does by coords

37	this_g.drawRect(drawSizes[0], drawSizes[1],drawSizes[0]+

38	drawSizes[2], drawSizes[1]+ drawSizes[3] , paint);

39

40	paint.setColor(Color.GRAY );

41

42	// finally draw the grid

43

44	paint.setStyle(Paint.Style.STROKE);

45	this_g.drawRect(drawSizes[0], drawSizes[1],drawSizes[0]+

46	drawSizes[2], drawSizes[1]+ drawSizes[3] , paint);

47

48	for(int i=1; i < 5 ; i++)

49

{

50	this_g.drawLine(drawSizes[0], drawSizes[1] +

51	(i * drawSizes[3] / 5), drawSizes[0] + drawSizes[2],

52	drawSizes[1] + (i * drawSizes[3] / 5), paint);

53	this_g.drawLine(drawSizes[0]+ (i * drawSizes[2] / 5),

54	drawSizes[1], drawSizes[0] + (i * drawSizes[2] / 5),

55	drawSizes[1] + drawSizes[3], paint);

56

}

57

58	// good for one value

59	print_axis_values_4_grid(this_g, cur_elt_array[1] ,

60	Double.toString(rounded_max) , Double.toString(rounded_min),

61	cur_elt_array[0] , 2 ,0 );

62

63	}  // --- end of draw_grid ---