实例介绍
【实例简介】Android例子源码SeekCircle圆形进度条(弧形刻度)CircleProgress
【实例截图】
【核心代码】
package com.caryfish.circleprogress; 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.util.AttributeSet; import android.view.View; public class ProgressCircle extends View { private float mRingBias = 0.15f; private float mSectionRatio = 5.0f; private RectF mSectionRect = new RectF(); protected float mSectionHeight; protected float mRadius; protected int mMaxProgress; protected int mProgress; protected float mCenterX; protected float mCenterY; private Paint mPaint; private int mColor1; private int mColor2; private int mInactiveColor; { mMaxProgress = 15; mProgress = 0; mPaint = new Paint(); mPaint.setAntiAlias(true); mPaint.setStyle(Paint.Style.FILL); mColor1 = Color.parseColor("#ffffd004"); mColor2 = Color.parseColor("#fffe2601"); mInactiveColor = Color.parseColor("#ffcccccc"); mPaint.setColor(mColor1); // Set default } public ProgressCircle(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); initAttributes(context, attrs); } public ProgressCircle(Context context, AttributeSet attrs) { super(context, attrs); initAttributes(context, attrs); } public ProgressCircle(Context context) { super(context); } private void initAttributes(Context context, AttributeSet attrs) { TypedArray attributes = context.getTheme().obtainStyledAttributes(attrs, R.styleable.SeekCircle, 0, 0); try { // Read and clamp max int max = attributes.getInteger(R.styleable.SeekCircle_max, 15); mMaxProgress = Math.max(max, 1); // Read and clamp progress int progress = attributes.getInteger(R.styleable.SeekCircle_progress, 0); mProgress = Math.max(Math.min(progress, mMaxProgress), 0); } finally { attributes.recycle(); } } private void updateDimensions(int width, int height) { // Update center position mCenterX = width / 2.0f; mCenterY = height / 2.0f; // Find shortest dimension int diameter = Math.min(width, height); float outerRadius = diameter / 2; float sectionHeight = (float) (1.5 * outerRadius * mRingBias); float sectionWidth = (float) (3 * sectionHeight / mSectionRatio); mRadius = outerRadius - sectionHeight / 2; mSectionRect.set(-sectionWidth / 2, -sectionHeight / 2, sectionWidth / 2, sectionHeight / 2); mSectionHeight = sectionHeight; } @Override protected synchronized void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int width = MeasureSpec.getSize(widthMeasureSpec); int height = MeasureSpec.getSize(heightMeasureSpec); if (width > height) super.onMeasure(heightMeasureSpec, widthMeasureSpec); else super.onMeasure(widthMeasureSpec, widthMeasureSpec); updateDimensions(getWidth(), getHeight()); } @Override protected void onSizeChanged(int w, int h, int oldw, int oldh) { super.onSizeChanged(w, h, oldw, oldh); updateDimensions(w, h); } @Override protected void onDraw(Canvas canvas) { float arcLeft = mCenterX - mRadius; float arcTop = mCenterY - mRadius ; float arcRight = mCenterX mRadius ; float arcBottom = mCenterY mRadius ; RectF arcRF0 = new RectF(arcLeft ,arcTop,arcRight,arcBottom); //画笔初始化 Paint PaintArc = new Paint(); PaintArc.setAntiAlias(true); //位置计算类 XChartCalc xcalc = new XChartCalc(); float Percentage = 0.0f; float CurrPer = -90.0f; for (int i = 0; i < mMaxProgress/2; i) { Percentage = (360-mMaxProgress) / mMaxProgress; if (i < mProgress) { float bias = (float) i / (float) (mMaxProgress - 1); int color = interpolateColor(mColor1, mColor2, bias); mPaint.setColor(color); } else { canvas.scale(1.0f, 1.0f); mPaint.setColor(mInactiveColor); } canvas.drawArc(arcRF0, CurrPer, Percentage, true, mPaint); xcalc.CalcArcEndPointXY(mCenterX, mCenterY, mRadius - mRadius/2/2, CurrPer Percentage/2); CurrPer =CurrPer Percentage 1; } for (int i = mMaxProgress/2; i < mMaxProgress; i) { Percentage = (360-mMaxProgress) / mMaxProgress; if (i < mProgress) { float bias = (float) i / (float) (mMaxProgress - 1); int color = interpolateColor(mColor2, mColor1, bias); mPaint.setColor(color); } else { canvas.scale(1.0f, 1.0f); mPaint.setColor(mInactiveColor); } canvas.drawArc(arcRF0, CurrPer, Percentage, true, mPaint); xcalc.CalcArcEndPointXY(mCenterX, mCenterY, mRadius - mRadius/2/2, CurrPer Percentage/2); CurrPer =CurrPer Percentage 1; } //画圆心 PaintArc.setColor(Color.WHITE); canvas.drawCircle(mCenterX,mCenterY,(int)(mRadius/1.5),PaintArc); super.onDraw(canvas); } private float interpolate(float a, float b, float bias) { return (a ((b - a) * bias)); } private int interpolateColor(int colorA, int colorB, float bias) { float[] hsvColorA = new float[3]; Color.colorToHSV(colorA, hsvColorA); float[] hsvColorB = new float[3]; Color.colorToHSV(colorB, hsvColorB); hsvColorB[0] = interpolate(hsvColorA[0], hsvColorB[0], bias); hsvColorB[1] = interpolate(hsvColorA[1], hsvColorB[1], bias); hsvColorB[2] = interpolate(hsvColorA[2], hsvColorB[2], bias); // NOTE For some reason the method HSVToColor fail in edit mode. Just use the start color for now if (isInEditMode()) return colorA; return Color.HSVToColor(hsvColorB); } /** * Get max progress * * @return Max progress */ public float getMax() { return mMaxProgress; } /** * Set max progress * * @param max */ public void setMax(int max) { int newMax = Math.max(max, 1); if (newMax != mMaxProgress) mMaxProgress = newMax; updateProgress(mProgress); invalidate(); } /** * Get Progress * * @return progress */ public int getProgress() { return mProgress; } /** * Set progress * * @param progress */ public void setProgress(int progress) { updateProgress(progress); } /** * Update progress internally. Clamp it to a valid range and invalidate the view if necessary * * @param progress * @return true if progress was changed and the view needs an update */ protected boolean updateProgress(int progress) { // Clamp progress progress = Math.max(0, Math.min(mMaxProgress, progress)); if (progress != mProgress) { mProgress = progress; invalidate(); return true; } return false; } }
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