自定义圆形进度条ProgressBar

摘要: 在项目中遇到要显示投资进度，用圆形进度条来显示，但是系统的满足不了需求，所以网上查找一番后，结合自己的重新自定义了一下

/**
*
*/
package cn.juzhong.view.widget;

import cn.juzhong.R;
import cn.juzhong.util.DensityUtil;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.graphics.Typeface;
import android.util.AttributeSet;
import android.view.View;

/**
* @author wanggenping
*
*/
public class RoundProgressBar extends View{
/**
* 画笔对象的引用
*/
private Paint paint;

/**
* 圆环的颜色
*/
private int roundColor;

/**
* 圆环进度的颜色
*/
private int roundProgressColor;

/**
* 中间进度百分比的字符串的颜色
*/
private int textColor;

/**
* 中间进度百分比的字符串的字体
*/
private float textSize;

/**
* 圆环的宽度
*/
private float roundWidth;

/**
* 外圆环的宽度
*/

/**
* 最大进度
*/
private int max;

/**
* 当前进度
*/
private int progress;
/**
* 是否显示中间的进度
*/
private boolean textIsDisplayable;

/**
* 进度的风格，实心或者空心
*/
private int style;

public static final int STROKE = 0;
public static final int FILL = 1;

private Context context;

public RoundProgressBar(Context context) {
this(context, null);
}

public RoundProgressBar(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}

public RoundProgressBar(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
this.context = context;
paint = new Paint();
paint = new Paint();
paint.setAntiAlias(true); // 消除锯齿
paint.setStyle(Paint.Style.STROKE); // 绘制空心圆

TypedArray mTypedArray = context.obtainStyledAttributes(attrs,
R.styleable.RoundProgressBar);

//获取自定义属性和默认值
roundColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundColor, Color.TRANSPARENT);
roundProgressColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundProgressColor, Color.BLUE);
textColor = mTypedArray.getColor(R.styleable.RoundProgressBar_textColor, Color.GREEN);
textSize = mTypedArray.getDimension(R.styleable.RoundProgressBar_textSize, 100);
roundWidth = mTypedArray.getDimension(R.styleable.RoundProgressBar_roundWidth, 2);

max = mTypedArray.getInteger(R.styleable.RoundProgressBar_max, 100);
textIsDisplayable = mTypedArray.getBoolean(R.styleable.RoundProgressBar_textIsDisplayable, true);
style = mTypedArray.getInt(R.styleable.RoundProgressBar_style, 0);

mTypedArray.recycle();
}

@SuppressLint("DrawAllocation")
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);

int center = getWidth()/2;
int innerCircle = DensityUtil.dip2px(context, 68); //设置内圆半径
int ringWidth = DensityUtil.dip2px(context, 5); //设置圆环宽度

//绘制内圆
this.paint.setColor(context.getResources().getColor(R.color.transparent));;
this.paint.setStrokeWidth(10);//设置内圆的厚度
canvas.drawCircle(center,center, innerCircle, this.paint);//以该圆为半径向内外扩展至厚度为10px

//绘制圆环,设置圆环的颜色修改画笔的颜色
this.paint.setColor(context.getResources().getColor(R.color.divider_line_color));
this.paint.setStrokeWidth(ringWidth);//设置圆环宽度
canvas.drawCircle(center,center, innerCircle+1+ringWidth/2, this.paint);//圆环宽度为中间圆

//绘制外圆
this.paint.setColor(context.getResources().getColor(R.color.title_bar_bg_color));
this.paint.setStrokeWidth(DensityUtil.dip2px(context, 2));
canvas.drawCircle(center,center, innerCircle+ringWidth, this.paint);

/**
* 画最外层的大圆环
*/
int outside = (int) (innerCircle+ringWidth + roundWidth/2);
paint.setColor(roundColor); //设置圆环的颜色
paint.setStyle(Paint.Style.STROKE); //设置空心
paint.setStrokeWidth(roundWidth); //设置圆环的宽度
paint.setAntiAlias(true);  //消除锯齿
canvas.drawCircle(center, center, outside, paint); //画出圆环

/**
* 画进度百分比
*/
//        paint.setStrokeWidth(0);
//        paint.setColor(textColor);
//        paint.setTextSize(textSize);
//        paint.setTypeface(Typeface.DEFAULT_BOLD); //设置字体
//        int percent = (int)(((float)progress / (float)max) * 100);  //中间的进度百分比，先转换成float在进行除法运算，不然都为0
//        float textWidth = paint.measureText(percent + "%");   //测量字体宽度，我们需要根据字体的宽度设置在圆环中间
//
//        if(textIsDisplayable && style == STROKE){
//            canvas.drawText(percent+"", center - textWidth / 2, center + textSize/2, paint); //画出进度百分比
//        }

/**
* 画圆弧 ，画圆环的进度
*/

//设置进度是实心还是空心
paint.setStrokeWidth(roundWidth); //设置圆环的宽度
paint.setColor(roundProgressColor);  //设置进度的颜色
RectF oval = new RectF(center - outside, center - outside, center
+ outside, center + outside);  //用于定义的圆弧的形状和大小的界限

switch (style) {
case STROKE:{
paint.setStyle(Paint.Style.STROKE);
canvas.drawArc(oval, 0, 360 * progress / max, false, paint);  //根据进度画圆弧
break;
}
case FILL:{
paint.setStyle(Paint.Style.FILL_AND_STROKE);
if(progress !=0)
canvas.drawArc(oval, 0, 360 * progress / max, true, paint);  //根据进度画圆弧
break;
}
}

}

public synchronized int getMax() {
return max;
}

/**
* 设置进度的最大值
* @param max
*/
public synchronized void setMax(int max) {
if(max < 0){
throw new IllegalArgumentException("max not less than 0");
}
this.max = max;
}

/**
* 获取进度.需要同步
* @return
*/
public synchronized int getProgress() {
return progress;
}

/**
* 设置进度，此为线程安全控件，由于考虑多线的问题，需要同步
* 刷新界面调用postInvalidate()能在非UI线程刷新
* @param progress
*/
public synchronized void setProgress(int progress) {
if(progress < 0){
throw new IllegalArgumentException("progress not less than 0");
}
if(progress > max){
progress = max;
}
if(progress <= max){
this.progress = progress;
postInvalidate();
}

}

public int getCricleColor() {
return roundColor;
}

public void setCricleColor(int cricleColor) {
this.roundColor = cricleColor;
}

public int getCricleProgressColor() {
return roundProgressColor;
}

public void setCricleProgressColor(int cricleProgressColor) {
this.roundProgressColor = cricleProgressColor;
}

public int getTextColor() {
return textColor;
}

public void setTextColor(int textColor) {
this.textColor = textColor;
}

public float getTextSize() {
return textSize;
}

public void setTextSize(float textSize) {
this.textSize = textSize;
}

public float getRoundWidth() {
return roundWidth;
}

public void setRoundWidth(float roundWidth) {
this.roundWidth = roundWidth;
}

}

需要配置自定义view的属性，方便在xml布局中设置。在res/values/attrs

<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="RoundProgressBar">
<attr name="roundColor" format="color"/>
<attr name="roundProgressColor" format="color"/>
<attr name="ringColor" format="color"/>
<attr name="innerCircleColor" format="color"/>
<attr name="excircleColor" format="color"/>
<attr name="roundWidth" format="dimension"></attr>
<attr name="ringWidth" format="dimension"></attr>
<attr name="innerCircleWidth" format="dimension"></attr>
<attr name="excircleWidth" format="dimension"></attr>
<attr name="textColor" format="color" />
<attr name="unitColor" format="color" />
<attr name="textSize" format="dimension" />
<attr name="unitSize" format="dimension" />
<attr name="max" format="integer"></attr>
<attr name="textIsDisplayable" format="boolean"></attr>
<attr name="style">
<enum name="STROKE" value="0"></enum>
<enum name="FILL" value="1"></enum>
</attr>
</declare-styleable>

</resources>

xml布局中

<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="RoundProgressBar">
<attr name="roundColor" format="color"/>
<attr name="roundProgressColor" format="color"/>
<attr name="ringColor" format="color"/>
<attr name="innerCircleColor" format="color"/>
<attr name="excircleColor" format="color"/>
<attr name="roundWidth" format="dimension"></attr>
<attr name="ringWidth" format="dimension"></attr>
<attr name="innerCircleWidth" format="dimension"></attr>
<attr name="excircleWidth" format="dimension"></attr>
<attr name="textColor" format="color" />
<attr name="unitColor" format="color" />
<attr name="textSize" format="dimension" />
<attr name="unitSize" format="dimension" />
<attr name="max" format="integer"></attr>
<attr name="textIsDisplayable" format="boolean"></attr>
<attr name="style">
<enum name="STROKE" value="0"></enum>
<enum name="FILL" value="1"></enum>
</attr>
</declare-styleable>

</resources>

在Java代码中

progressBar.setProgress(borrowInfo.getProgress());