android绘制折线图

最近公司做的项目中要用到折线图，网上看了下都不是很能满足自己的需要，因此就自己写了个，废话不说了，直接上代码
package com.example.view;import android.content.Context;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Matrix;import android.graphics.Paint;import android.graphics.PaintFlagsDrawFilter;import android.graphics.Typeface;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.View;import android.view.ViewConfiguration;import android.widget.Scroller;import com.example.aa.R;/*** LastTNT* @author 翟昆* @date 2014-5-6 上午10:28:53* @version 1.0*/public class LineChartView extends View {private int mov_x; // 移动X坐标private int mov_y; // 移动Y坐标private int diff_Y; // Y轴高度private Paint paint;// 声明画笔private int color_xy = Color.rgb(77, 189, 235);//设置标线颜色private int line_color_y = Color.rgb(18, 197, 255);//标注线的颜色private int zhexian_color = Color.rgb(21, 139, 229);//折线的颜色private int Guides_line_color = Color.rgb(229, 21, 60);//参考线的颜色private int text_color = Color.rgb(254, 102, 1);//折线字体颜色private int width_xy = 4;//设置标线宽度private int line_width_y = 2;//标注线的宽度private int zhexian_width = 4;//折线的宽度int init_x = 0;//初始按下的X坐标int init_left = 0;//左边距private int MAX_X = 2000;private int MAX_X_Extend = 100;//向右侧继续延伸100private int MAX_Y = 100;//Y轴最大值private int lineNum = 24; //标线份数private int lineInterval_x =0;//标线间隔private int lineInterval_y = 0;//标注线间隔private int width = 0;//控件宽度private int height = 0;//控件高度private Bitmap bmp;//标记点的图private int Guides_line = 80;//参考线private float textSize = 22;//折线图字体大小private float CalloutSize = 18;//标注字体大小private PaintFlagsDrawFilter pfd;private Matrix matrix = new Matrix();private int paddingBottom = 50; private int paddingTop = 10;private int[] nums = new int[24];//实现惯性滑动效果private Scroller mScroller;private int mTouchSlop;private int mMinimumVelocity;private int mMaximumVelocity;public LineChartView(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);}public LineChartView(Context context) {super(context);}public LineChartView(Context context, AttributeSet attrs) {super(context, attrs);paint = new Paint();pfd = new PaintFlagsDrawFilter(0, Paint.ANTI_ALIAS_FLAG| Paint.FILTER_BITMAP_FLAG);paint.setAntiAlias(true);matrix.postScale(1f, 1f);lineInterval_x = MAX_X/lineNum;bmp = BitmapFactory.decodeResource(getResources(), R.drawable.point); for (int i = 0; i < nums.length; i++) {nums[i] = (int) (Math.random()*MAX_Y);}}//void init(Context context) {//mScroller = new Scroller(getContext());//setFocusable(true);//setDescendantFocusability(FOCUS_AFTER_DESCENDANTS);//setWillNotDraw(false);//final ViewConfiguration configuration = ViewConfiguration.get(context);//mTouchSlop = configuration.getScaledTouchSlop();//mMinimumVelocity = configuration.getScaledMinimumFlingVelocity();//mMaximumVelocity = configuration.getScaledMaximumFlingVelocity();////}@Overrideprotected void onDraw(Canvas canvas) {if(init_left==0){init_left = this.getLeft();}if(width==0){width = this.getRight()-this.getLeft();height = this.getBottom() - this.getTop();lineInterval_y = (height*2/3)/MAX_Y;}diff_Y = this.getBottom() - this.getTop();// 设置画布颜色 也就是背景颜色canvas.drawColor(Color.TRANSPARENT);paint.setColor(Color.BLACK);canvas.drawText("绘制无规则几何图形喔！！！", 150, 30, paint);//绘制X坐标轴paint.setColor(color_xy);paint.setStrokeWidth(width_xy);canvas.drawLine(paddingBottom, diff_Y-paddingBottom, MAX_X+paddingBottom+MAX_X_Extend, diff_Y-paddingBottom, paint);//绘制Y坐标轴paint.setColor(color_xy);paint.setStrokeWidth(width_xy);canvas.drawLine(paddingBottom, diff_Y-paddingBottom, paddingBottom, this.getTop()+paddingTop, paint);//绘制标注线for (int i = 1; i <=lineNum; i++) {paint.setColor(line_color_y);paint.setStrokeWidth(line_width_y);canvas.drawLine(paddingBottom+lineInterval_x*i, diff_Y-paddingBottom, paddingBottom+lineInterval_x*i, this.getTop()+paddingTop, paint);//绘制标注线下的字体paint.setColor(Color.BLACK);paint.setTextSize(CalloutSize);paint.setTextScaleX(1.0f);//设置文本缩放paint.setTypeface(Typeface.SERIF);canvas.drawText("6日"+i+"时", paddingBottom+lineInterval_x*i-20, diff_Y-paddingBottom+20, paint);}//绘制参考线paint.setColor(Guides_line_color);paint.setStrokeWidth(width_xy);canvas.drawLine(paddingBottom, diff_Y-paddingBottom-lineInterval_y*Guides_line, MAX_X+paddingBottom+MAX_X_Extend, diff_Y-paddingBottom-lineInterval_y*Guides_line, paint);//绘制参考线标注paint.setColor(text_color);paint.setTextSize(textSize);paint.setTextScaleX(1.0f);//设置文本缩放paint.setTypeface(Typeface.SERIF);canvas.drawText(Guides_line+"", paddingBottom-30, diff_Y-paddingBottom-lineInterval_y*Guides_line+5, paint);//绘制折线for (int i = 1; i < nums.length; i++) {int temp = nums[i-1];if(temp==0){temp = 10;}int temp1 = nums[i];if(temp1==0){temp1 = 10;}paint.setColor(zhexian_color);paint.setStrokeWidth(zhexian_width);canvas.drawLine(paddingBottom + lineInterval_x * i,(diff_Y - paddingBottom) - (lineInterval_y * temp), paddingBottom+lineInterval_x*(i+1), (diff_Y-paddingBottom)-(lineInterval_y*temp1), paint);}//绘制折线点for (int i = 1; i <= nums.length; i++) {int temp = nums[i-1];if(temp==0){temp = 10;}// 绘制一个圆形canvas.drawBitmap(bmp, paddingBottom+lineInterval_x*i-8, (diff_Y-paddingBottom)-(lineInterval_y*temp)-5, paint);paint.setColor(text_color);paint.setTextSize(textSize);paint.setTextScaleX(1.0f);//设置文本缩放//设置字体样式 Typeface.DEFAULT：默认字体;Typeface.DEFAULT_BOLD：加粗字体;Typeface.MONOSPACE：monospace;Typeface.SANS_SERIF：sans;Typeface.SERIF：serifpaint.setTypeface(Typeface.SERIF);canvas.drawText(temp+"", paddingBottom+lineInterval_x*i-8, (diff_Y-paddingBottom)-(lineInterval_y*temp)-10, paint);}}@Overridepublic boolean onTouchEvent(MotionEvent event) {mov_x = (int) event.getX();switch (event.getAction()) {case MotionEvent.ACTION_UP:break;case MotionEvent.ACTION_DOWN:init_x = (int) event.getX();break;case MotionEvent.ACTION_MOVE:int diff_left = this.getLeft() + mov_x - init_x;int diff_right = MAX_X+paddingBottom+MAX_X_Extend-width;//向左滑动的最大距离if (diff_left < init_left) {if(diff_right>0&&diff_left>-diff_right){this.setLeft(diff_left);}else{this.setLeft(-diff_right);}}else{this.setLeft(init_left);}break;}return true;}}
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