package com.bcb.presentation.view.custom;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.WindowManager;
/**
* 描述：生利宝收益
* 作者：baicaibang
* 时间：2016/8/15 09:34
*/
public class SlbSyView extends View {
Context context;
Paint paint;
Path path;//用于绘制复杂的图形轮廓，比如折线，圆弧以及各种复杂图案
int width, height;//表格的宽高
int widthBlank, heightBlank;//表格距离左侧、顶部的空白距离
static final int WIDTH_MAX = 6;//View的相对宽高（7个）；WIDTH_MAX是不会变的
float heightMax = 7.0f;//heightMax是根据需要随便改变；
float[] heights = new float[WIDTH_MAX + 1];//高度值
float heightOffset = 0.1f;//偏差，根据需要设置
float y6Value;//最后一个坐标的值
public SlbSyView(Context context) {
this(context, null);
}
public SlbSyView(Context context, AttributeSet attrs) {
super(context, attrs);
this.context = context;
init();
}
private void init() {
paint = new Paint();
path = new Path();
paint.setAntiAlias(true);
paint.setDither(true);
heightBlank = dp2px(20);
widthBlank = dp2px(35);
width = getScreenWidth(context) - widthBlank*2;
height = dp2px(100);
}
public void setHeights(float[] heights) {
if (heights.length != 7) throw new RuntimeException("长度不对");
y6Value = heights[6];
heightMax = getMaxValue(heights) - getMinValue(heights) + heightOffset * 2;//根据需要设置
for (int i = 0; i < heights.length; i++) {
this.heights[i] = getMaxValue(heights) + heightOffset - heights[i];//根据需要设置
}
invalidate();
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
canvas.drawColor(Color.WHITE);
//1、画背景
paint.setColor(0x1adb3838);//10%透明度
paint.setStyle(Paint.Style.FILL);
path.moveTo(widthBlank, height + heightBlank);//指定初始轮廓点，若没指定默认从(0,0)点开始
for (int i = 0; i < heights.length; i++) {
path.lineTo(widthBlank + width * i / WIDTH_MAX, //中间的点
heightBlank + height * heights[i] / heightMax);
}
path.lineTo(widthBlank + width, heightBlank + height);//最后的一个点
path.close(); // 回到初始点形成封闭的曲线
canvas.drawPath(path, paint);
//2、画基准线条。每条线都需要两个坐标(注意，是每两个值组成一个坐标)
paint.setStrokeWidth(dp2px(0.5f));//设置画笔粗细，单位为像素
paint.setColor(0xff999999);
float[] points = new float[7 * 4];//坐标
//画7条竖线
for (int i = 0; i < points.length; i += 4) {
points[i] = widthBlank + width * i / (4 * WIDTH_MAX);
points[i + 1] = heightBlank;
points[i + 2] = points[i];
points[i + 3] = heightBlank + height;
}
canvas.drawLines(points, paint);
//画2条横线
canvas.drawLine(widthBlank, heightBlank, //
widthBlank + width, heightBlank, paint);
canvas.drawLine(widthBlank, heightBlank + height,//
widthBlank + width, heightBlank + height, paint);
//3、画利率线
paint.setColor(0xffdb3838);
paint.setStrokeWidth(dp2px(2));
for (int i = 0; i < heights.length - 1; i++) {//注意遍历条件 heights.length - 1
canvas.drawLine(widthBlank + width * i / WIDTH_MAX, //
heightBlank + height * heights[i] / heightMax, //
widthBlank + width * (i + 1) / WIDTH_MAX, //
heightBlank + height * heights[i + 1] / heightMax, paint);
}
//4、画圆形
float x6Point = widthBlank + width * 6 / WIDTH_MAX;
float y6Point = heightBlank + height * heights[6] / heightMax;
//画白色的实心圆圆
paint.setStyle(Paint.Style.FILL);
paint.setColor(Color.WHITE);
canvas.drawCircle(x6Point, y6Point, dp2px(4), paint);
//画空心圆
paint.setStyle(Paint.Style.STROKE);
paint.setColor(0xffdb3838);
canvas.drawCircle(x6Point, y6Point, dp2px(4), paint);//圆心坐标，半径
//5、画文本（今天的年利率）
//画圆角矩形
paint.setStyle(Paint.Style.FILL);
RectF rect = new RectF(x6Point - dp2px(25), y6Point - dp2px(30), //左上角坐标
x6Point + dp2px(25), y6Point - dp2px(10));//右下角坐标
canvas.drawRoundRect(rect, dp2px(3), dp2px(3), paint);//两侧圆角弧度的大小
//画文字
paint.setColor(Color.WHITE);
paint.setTextSize(dp2px(13));//单位是px，只在绘制文字时有效
paint.setTextAlign(Paint.Align.CENTER);//绘制的文字以drawText时指定的 float x 水平居中，默认值是Align.LEFT
canvas.drawText(y6Value + "", rect.centerX(),//
rect.centerY() + dp2px(4.5f), paint);//注意 float y 代表的是 baseline 的值，也即e和f的下边界，而非g的下边界
}
private int dp2px(float dpValue) {
float scale = context.getResources().getDisplayMetrics().density;
return (int) (dpValue * scale + 0.5f);
}
/**
* 获取屏幕宽
*/
public static int getScreenWidth(Context context) {
DisplayMetrics metric = new DisplayMetrics();
((WindowManager) context.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay().getMetrics(metric);
return metric.widthPixels;
}
/**
* 取最大值
*/
public static float getMaxValue(float[] a) {
float temp = a[0];
for (int i = 0; i < a.length; i++) {
if (a[i] > temp) temp = a[i];
}
return temp;
}
/**
* 取最小值
*/
public static float getMinValue(float[] a) {
float temp = a[0];
for (int i = 0; i < a.length; i++) {
if (a[i] < temp) temp = a[i];
}
return temp;
}
}
