Android自定义控件横向柱状统计图

本文实例为大家分享了Android实现横向柱状统计图的具体代码，供大家参考，具体内容如下

碰到一个项目需要用到统计图功能，比较简单就自定义写了一个。没有写过多的样式和功能，仅有简单的横向柱状统计图。

传入数据后大致样式如下：

/**横向柱状统计图
 * Created by Administrator on 2018/1/16 0016.
 */
public class HorizontalChartView extends View {

 /**
  * 间隔线画笔
  */
 private Paint paint;

 /**
  * 线的颜色
  */
 private int color_line = Color.rgb(230, 230, 230);

 /**
  * 字的颜色
  */
 private int color_font = Color.rgb(51, 51, 51);

 /**
  * 比例图颜色
  */
 private int color_plan = Color.rgb(22, 85, 164);

 /**
  * 比例图画笔
  */
 private Paint paint_plan;

 /**
  * 比例图高度
  */
 private int plan_height;

 /**
  * 初始化比例
  */
 private Float[] ratio = {0f, 0f, 0f, 0f, 0f, 0f, 0f, 0f, 0f, 0f, 0f, 0f};

 /**
  * 文字画笔1
  */
 private Paint paint_font;

 /**
  * 文字画笔2
  */
 private Paint paint_font2;

 /**
  * 线的条数
  */
 private int line_num = 11;

 /**
  * 比例数
  */
 private String ratio_num = "0";

 /**
  * 月份
  */
 private String month_num = "1月";

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

 public HorizontalChartView(Context context, @Nullable AttributeSet attrs) {
  super(context, attrs);
  init(context, attrs);
 }

 public HorizontalChartView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
  super(context, attrs, defStyleAttr);
  init(context, attrs);
 }

 @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
 public HorizontalChartView(Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) {
  super(context, attrs, defStyleAttr, defStyleRes);
  init(context, attrs);
 }

 /**
  * 初始化
  *
  * @param context
  * @param attrs
  */
 public void init(Context context, AttributeSet attrs) {

  paint = new Paint();
  paint.setColor(color_line);

  paint_plan = new Paint();
  paint_plan.setColor(color_plan);

  paint_font = new Paint();
  paint_font.setColor(color_font);
  paint_font.setTextSize(DensityUtils.dp2px(context, 12));
  paint_font.setAntiAlias(true);
  paint_font.setTextAlign(Paint.Align.CENTER);

  paint_font2 = new Paint();
  paint_font2.setColor(color_font);
  paint_font2.setTextSize(DensityUtils.dp2px(context, 12));
  paint_font2.setAntiAlias(true);
  paint_font2.setTextAlign(Paint.Align.RIGHT);
 }

 @Override
 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
  super.onMeasure(widthMeasureSpec, heightMeasureSpec);
 }

 @Override
 protected void onDraw(Canvas canvas) {
  super.onDraw(canvas);
  int width = getWidth();
  int height = getHeight();

  int lift_width = (int) (width * 0.15);
  int line_width = (int) (width * 0.78);
  //获取底部文字信息
  Paint.FontMetrics fm = paint_font.getFontMetrics();

  int line_length = (int) (height - (fm.bottom - fm.top) - 4);

  plan_height = (int) (line_length / 12 * 0.3);

  for (int i = 0; i < line_num; i++) {
   canvas.save();

   if (i == 0) {
    ratio_num = "0";
   } else {
    ratio_num = i + "0";
   }
   //底部百分比数字
   canvas.drawText(ratio_num, lift_width + i * line_width / 10, height - 10, paint_font);
   //网络线
   canvas.drawLine(lift_width + i * line_width / 10, 0, lift_width + i * line_width / 10, line_length, paint);
   canvas.restore();
  }
  //获取月份文字信息
  Paint.FontMetrics fm1 = paint_font2.getFontMetrics();
  for (int n = 12; n > 0; n--) {
   canvas.save();
   month_num = n + "月";
   //左侧月份
   canvas.drawText(month_num, lift_width / 4 * 3, ((line_length / 12)) * (13 - n) - line_length / 24 + (fm1.bottom - fm1.top) / 2, paint_font2);
   //比例图
   canvas.drawRect(lift_width, line_length / 12 * (13 - n) - (line_length / 24 + plan_height / 2) + fm1.bottom,
     line_width * (ratio[n - 1] / 100) + lift_width, line_length / 12 * (13 - n) - (line_length / 24 + plan_height / 2) + plan_height + fm1.bottom, paint_plan);

   canvas.restore();
  }
 }

 /**
  * 传入比例信息
  *
  * @param ratio
  */
 public void setRatio(Float[] ratio) {
  this.ratio = ratio;
 }

}

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