Android AChartEngine ( referred ACE) draw a histogram how to changethe column width ?

AChartEngine ( referred ACE) draw a histogram how to change the column width ? I painted pillars very fine ; following code , how to adjust ? ?

private void setChartSettings(XYMultipleSeriesRenderer renderer) {
 	         renderer.setChartTitle( "电视商城" );
 	         renderer.setXTitle( "x values" );
 	         renderer.setYTitle( "y values" );
 	         renderer.setBackgroundColor(Color.BLACK);
 		renderer.setApplyBackgroundColor(true);
 		renderer.setDisplayChartValues(true); 
 		renderer.setXLabelsAngle(-15); // 设置 X 轴标签倾斜角度 (clockwise degree) 
 		renderer.setXLabels(0); //设置 X 轴不显示数字（改用我们手动添加的文字标签）
 		for (int i = 0; i < titles.length ; i++){ 
 		        renderer.addTextLabel(i, titles[i]); 
 		      } 
 	         renderer.setMargins( new int [] {20, 30, 15, 0}); // 图形 4 边距 
 	         renderer.setXAxisMin(0);
 	         renderer.setXAxisMax(8);
 	         renderer.setBarSpacing(0.1);
 	         renderer.setYAxisMin(1000);
 	         renderer.setYAxisMax(21000);
 	 }

how to adjust the width of the histogram ? ? ?

In addition, there is a problem . . . How the X-axis is set to display the time ? ?


seeking advice ! ! !
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width I remember seemingly powerless , drawn is a view, you can like the picture as scaling. Ordinate change the time , I had to change, indeed forgotten ! On the word , huh, huh !
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Well, I solved the problem , renderer.setBarSpacing (3.9); histogram allows thinner , whereas renderer.setBarSpacing (-3.9) allows histogram thicker. values ​​can set their own , but the positive and negative signs to right, and must have a decimal
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landlord I have met you this question ; I also set renderer.setBarSpacing (-3.9) is negative , but did not reach the desired effect . You can also set up that place yet ?