Java code?
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package com.demo.eric.views;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.View;
/** * 弧形进度条
*
* @author Eric
*
*/
public class ArcProgressbar extends View {
public ArcProgressbar(Context context) {
super(context);
}
public ArcProgressbar(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
init(canvas);
}
private void init(Canvas canvas) {
// 画弧形的矩阵区域。
rectBg = new RectF(15, 15, diameter, diameter);
// 计算弧形的圆心和半径。
int cx1 = (diameter + 15) / 2;
int cy1 = (diameter + 15) / 2;
int arcRadius = (diameter - 15) / 2;
// ProgressBar结尾和开始画2个圆，实现ProgressBar的圆角。
mPaintCircle = new Paint();
mPaintCircle.setAntiAlias(true);
mPaintCircle.setColor(bgColor);
canvas.drawCircle(
(float) (cx1 + arcRadius * Math.cos(startAngle * 3.14 / 180)),
(float) (cy1 + arcRadius * Math.sin(startAngle * 3.14 / 180)),
bgStrokeWidth / 2, mPaintCircle);// 小圆
canvas.drawCircle(
(float) (cx1 + arcRadius
* Math.cos((180 - startAngle) * 3.14 / 180)),
(float) (cy1 + arcRadius
* Math.sin((180 - startAngle) * 3.14 / 180)),
bgStrokeWidth / 2, mPaintCircle);// 小圆
// 弧形背景。
mPaintBg = new Paint();
mPaintBg.setAntiAlias(true);
mPaintBg.setStyle(Style.STROKE);
mPaintBg.setStrokeWidth(bgStrokeWidth);
mPaintBg.setColor(bgColor);
canvas.drawArc(rectBg, startAngle, endAngle, false, mPaintBg);
// 弧形小背景。
if (showSmallBg) {
mPaintSmallBg = new Paint();
mPaintSmallBg.setAntiAlias(true);
mPaintSmallBg.setStyle(Style.STROKE);
mPaintSmallBg.setStrokeWidth(barStrokeWidth);
mPaintSmallBg.setColor(smallBgColor);
canvas.drawArc(rectBg, startAngle, endAngle, false, mPaintSmallBg);
}
// 弧形ProgressBar。
mPaintBar = new Paint();
mPaintBar.setAntiAlias(true);
mPaintBar.setStyle(Style.STROKE);
mPaintBar.setStrokeWidth(barStrokeWidth);
mPaintBar.setColor(barColor);
canvas.drawArc(rectBg, startAngle, progress, false, mPaintBar);
// 随ProgressBar移动的圆。
if (showMoveCircle) {
mPaintCircle.setColor(barColor);
canvas.drawCircle(
(float) (cx1 + arcRadius
* Math.cos(angleOfMoveCircle * 3.14 / 180)),
(float) (cy1 + arcRadius
* Math.sin(angleOfMoveCircle * 3.14 / 180)),
bgStrokeWidth / 2, mPaintCircle);// 小圆
}
invalidate();
}
/**
*
* @param progress
*/
public void addProgress(int _progress) {
progress += _progress;
angleOfMoveCircle += _progress;
System.out.println(progress);
if (progress > endAngle) {
progress = 0;
angleOfMoveCircle = startAngle;
}
invalidate();
}
/**
* 设置弧形背景的画笔宽度。
*/
public void setBgStrokeWidth(int bgStrokeWidth) {
this.bgStrokeWidth = bgStrokeWidth;
}
/**
* 设置弧形ProgressBar的画笔宽度。
*/
public void setBarStrokeWidth(int barStrokeWidth) {
this.barStrokeWidth = barStrokeWidth;
}
/**
* 设置弧形背景的颜色。
*/
public void setBgColor(int bgColor) {
this.bgColor = bgColor;
}
/**
* 设置弧形ProgressBar的颜色。
*/
public void setBarColor(int barColor) {
this.barColor = barColor;
}
/**
* 设置弧形小背景的颜色。
*/
public void setSmallBgColor(int smallBgColor) {
this.smallBgColor = smallBgColor;
}
/**
* 设置弧形的直径。
*/
public void setDiameter(int diameter) {
this.diameter = diameter;
}
/**
* 是否显示小背景。
*/
public void setShowSmallBg(boolean showSmallBg) {
this.showSmallBg = showSmallBg;
}
/**
* 是否显示移动的小圆。
*/
public void setShowMoveCircle(boolean showMoveCircle) {
this.showMoveCircle = showMoveCircle;
}
private int bgStrokeWidth = 44;
private int barStrokeWidth = 15;
private int bgColor = Color.GRAY;
private int barColor = Color.RED;
private int smallBgColor = Color.WHITE;
private int progress = 0;
private int angleOfMoveCircle = 140;// 移动小园的起始角度。
private int startAngle = 140;
private int endAngle = 260;
private Paint mPaintBar = null;
private Paint mPaintSmallBg = null;
private Paint mPaintBg = null;
private Paint mPaintCircle = null;
private RectF rectBg = null;
/**
* 直徑。
*/
private int diameter = 450;
private boolean showSmallBg = true;// 是否显示小背景。
private boolean showMoveCircle = true;// 是否显示移动的小园。
} |