最近设计要求要一个圆形进度条渐变的需求:
1.画圆形进度条
2.解决渐变
最终实现效果代码
package com.vIEw;import androID.content.Context;import androID.content.res.TypedArray;import androID.graphics.Canvas;import androID.graphics.color;import androID.graphics.Matrix;import androID.graphics.Paint;import androID.graphics.RectF;import androID.graphics.SweepGradIEnt;import androID.util.AttributeSet;import androID.vIEw.VIEw;import com.fx.R;public class CompletedVIEw extends VIEw { // 画实心圆的画笔 private Paint mCirclePaint; // 画圆环的画笔 private Paint mRingPaint; // 画圆环的画笔背景色 private Paint mRingPaintBg; // 画字体的画笔 private Paint mTextPaint; // 圆形颜色 private int mCirclecolor; // 圆环颜色 private int mRingcolor; // 圆环背景颜色 private int mRingBgcolor; // 半径 private float mRadius; // 圆环半径 private float mRingRadius; // 圆环宽度 private float mstrokeWIDth; // 圆心x坐标 private int mXCenter; // 圆心y坐标 private int mYCenter; // 字的长度 private float mTxtWIDth; // 字的高度 private float mTxtHeight; // 总进度 private int mTotalProgress = 100; // 当前进度 private int mProgress; private String string; public CompletedVIEw(Context context,AttributeSet attrs) { super(context,attrs); // 获取自定义的属性 initAttrs(context,attrs); initvariable(); } //属性 private voID initAttrs(Context context,AttributeSet attrs) { TypedArray typeArray = context.gettheme().obtainStyledAttributes(attrs,R.styleable.TasksCompletedVIEw,0); mRadius = typeArray.getDimension(R.styleable.TasksCompletedVIEw_radius,80); mstrokeWIDth = typeArray.getDimension(R.styleable.TasksCompletedVIEw_strokeWIDth,10); mCirclecolor = typeArray.getcolor(R.styleable.TasksCompletedVIEw_circlecolor,0xFFFFFFFF); mRingcolor = typeArray.getcolor(R.styleable.TasksCompletedVIEw_ringcolor,0xFFFFFFFF); mRingBgcolor = typeArray.getcolor(R.styleable.TasksCompletedVIEw_ringBgcolor,0xFFFFFFFF); mRingRadius = mRadius + mstrokeWIDth / 2; } RectF oval; //初始化画笔 private voID initvariable() { oval = new RectF(); //内圆 mCirclePaint = new Paint(); mCirclePaint.setAntiAlias(true); mCirclePaint.setcolor(mCirclecolor); mCirclePaint.setStyle(Paint.Style.FILL); mCirclePaint.setstrokeCap(Paint.Cap.ROUND); //外圆弧背景 mRingPaintBg = new Paint(); mRingPaintBg.setAntiAlias(true); mRingPaintBg.setcolor(mRingBgcolor); mRingPaintBg.setStyle(Paint.Style.stroke); mRingPaintBg.setstrokeWIDth(mstrokeWIDth); //外圆弧 mRingPaint = new Paint(); mRingPaint.setAntiAlias(true);// mRingPaint.setcolor(mRingcolor); mRingPaint.setStyle(Paint.Style.stroke); mRingPaint.setstrokeWIDth(mstrokeWIDth); mRingPaint.setstrokeCap(Paint.Cap.ROUND);//设置线冒样式,有圆 有方 //中间字 mTextPaint = new Paint(); mTextPaint.setAntiAlias(true); mTextPaint.setStyle(Paint.Style.FILL); mTextPaint.setcolor(mRingcolor); mTextPaint.setTextSize(mRadius / 2); Paint.FontMetrics fm = mTextPaint.getFontMetrics(); mTxtHeight = (int) Math.ceil(fm.descent - fm.ascent); } SweepGradIEnt sweepGradIEnt; //画图 @OverrIDe protected voID onDraw(Canvas canvas) { mXCenter = getWIDth() / 2; mYCenter = getHeight() / 2; //内圆 canvas.drawCircle(mXCenter,mYCenter,mRadius,mCirclePaint); //外圆弧背景 RectF oval1 = new RectF(); oval1.left = (mXCenter - mRingRadius); oval1.top = (mYCenter - mRingRadius); oval1.right = mRingRadius * 2 + (mXCenter - mRingRadius); oval1.bottom = mRingRadius * 2 + (mYCenter - mRingRadius); canvas.drawArc(oval1,360,false,mRingPaintBg); //圆弧所在的椭圆对象、圆弧的起始角度、圆弧的角度、是否显示半径连线 //外圆弧 if (mProgress > 0 ) { oval.left = (mXCenter - mRingRadius); oval.top = (mYCenter - mRingRadius); oval.right = mRingRadius * 2 + (mXCenter - mRingRadius); oval.bottom = mRingRadius * 2 + (mYCenter - mRingRadius); if (sweepGradIEnt==null) { int[] arccolors= new int[]{mRingcolor,color.parsecolor("#b05e39"),mRingcolor}; float[] arcPostion=new float[]{0.0f,0.5f,0.95f};// sweepGradIEnt = new SweepGradIEnt(mXCenter,mRingcolor,color.parsecolor("#b05e39")); sweepGradIEnt = new SweepGradIEnt(mXCenter,arccolors,arcPostion); Matrix matrix = new Matrix(); matrix.setRotate(-90,mXCenter,mYCenter); sweepGradIEnt.setLocalMatrix(matrix); mRingPaint.setShader(sweepGradIEnt); } canvas.drawArc(oval,-90,((float)mProgress / mTotalProgress) * 360,mRingPaint); // //字体 String txt = mProgress + "%"; mTxtWIDth = mTextPaint.measureText(txt,txt.length()); canvas.drawText(txt,mXCenter - mTxtWIDth / 2,mYCenter + mTxtHeight / 4,mTextPaint); } } public voID setText(String string){ } //设置进度 public voID setProgress(int progress) { mProgress = progress; postInvalIDate();//重绘 }}
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