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PieView.java
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PieView.java
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package com.suphu.demo.widget;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.View;
import com.suphu.demo.model.PieModel;
import java.util.ArrayList;
/**
* Created by Administrator on 2017-7-16.
*/
public class PieView extends View {
private Paint mPaint;
private RectF mRectF;
//数据源
private ArrayList<PieModel> lists;
//初始化弧度位置 270(时钟12点开始)
private float mStartAngle = 270;
//单前View的宽度
private int width;
//单前View的高度
private int height;
public void setLists(float mStartAngle,ArrayList<PieModel> lists) {
if(lists==null || lists.size()==0){
return;
}
this.mStartAngle=mStartAngle;
//处理数据 把进度转百分比
int sumProgress=0;
for(PieModel pieModel:lists){
sumProgress+=pieModel.getProgress();
}
for(PieModel pieModel:lists){
pieModel.setPercentage(pieModel.getProgress()/sumProgress * 360);
}
this.lists = lists;
invalidate();
}
public PieView(Context context) {
this(context,null);
}
public PieView(Context context, AttributeSet attrs) {
this(context, attrs,0);
}
public PieView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
mPaint=new Paint();
mPaint.setAntiAlias(true);
mPaint.setStyle(Paint.Style.FILL);
mRectF=new RectF();
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
this.width=w;
this.height=h;
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if(lists==null || lists.size()==0){
return;
}
//内部圆的宽度的高度
int arcWidth=width-getPaddingLeft()-getPaddingRight();
int arcHeight=height-getPaddingTop()-getPaddingBottom();
//因为要绘制饼状图是个圆,View的宽度和高度需要一致 - padding值
//取最大的作为半径
int radius=Math.max(arcWidth,arcHeight) /2 ;
//设置圆弧的矩形以单前View的整个位置-padding
mRectF.set(getPaddingLeft(),getPaddingTop(),radius*2+getPaddingLeft(),radius*2+getPaddingTop());
for(PieModel pieModel:lists){
mPaint.setColor(pieModel.getColor());
float currentPercentage=pieModel.getPercentage();
canvas.drawArc(mRectF,mStartAngle,currentPercentage,true,mPaint);
//绘制后起始角度+
mStartAngle+=currentPercentage;
}
}
}