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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。} |