Android自定义View——圆形进度式按钮

package com.qiangyu.test.buttoncircleprogress.view; import android.content.Context; import android.content.res.TypedArray; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Path; import android.graphics.RectF; import android.util.AttributeSet; import android.util.TypedValue; import android.widget.ProgressBar; import com.qiangyu.test.buttoncircleprogress.R; /** * yangqiangyu on 8/16/16 15:10 * csdn博客地址:http://blog.csdn.net/yissan */ public class ButtonCircleProgressBar extends ProgressBar { private static final int DEFAULT_TEXT_COLOR = 0XFFFC00D1; private static final int DEFAULT_COLOR_UNREACHED_COLOR = 0xFFd3d6da; private static final int DEFAULT_HEIGHT_REACHED_PROGRESS_BAR = 2; private static final int DEFAULT_HEIGHT_UNREACHED_PROGRESS_BAR = 2; /** * The status of this view currently; */ private Status mStatus = Status.End; /** * painter of all drawing things */ protected Paint mPaint = new Paint(); /** * height of reached progress bar */ protected int mReachedProgressBarHeight = dp2px(DEFAULT_HEIGHT_REACHED_PROGRESS_BAR); /** * color of reached bar */ protected int mReachedBarColor = DEFAULT_TEXT_COLOR; /** * color of unreached bar */ protected int mUnReachedBarColor = DEFAULT_COLOR_UNREACHED_COLOR; /** * height of unreached progress bar */ protected int mUnReachedProgressBarHeight = dp2px(DEFAULT_HEIGHT_UNREACHED_PROGRESS_BAR); /** * the length of triangle */ private int triangleLength; /** * use path to draw triangle */ private Path mPath; /** * mRadius of view */ private int mRadius = dp2px(30); public ButtonCircleProgressBar(Context context) { this(context,null); } public ButtonCircleProgressBar(Context context, AttributeSet attrs) { this(context, attrs,0); } public ButtonCircleProgressBar(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); // init values from custom attributes final TypedArray attributes = getContext().obtainStyledAttributes( attrs, R.styleable.ButtonCircleProgressBar); mReachedBarColor = attributes .getColor( R.styleable.ButtonCircleProgressBar_progress_reached_color, Color.BLUE); mUnReachedBarColor = attributes .getColor( R.styleable.ButtonCircleProgressBar_progress_unreached_color, DEFAULT_COLOR_UNREACHED_COLOR); mReachedProgressBarHeight = (int) attributes .getDimension( R.styleable.ButtonCircleProgressBar_progress_reached_bar_height, mReachedProgressBarHeight); mUnReachedProgressBarHeight = (int) attributes .getDimension( R.styleable.ButtonCircleProgressBar_progress_unreached_bar_height, mUnReachedProgressBarHeight); mRadius = (int) attributes.getDimension( R.styleable.ButtonCircleProgressBar_radius, mRadius); attributes.recycle(); mPaint.setStyle(Paint.Style.STROKE); mPaint.setAntiAlias(true); mPaint.setDither(true); mPaint.setStrokeCap(Paint.Cap.ROUND); mPath = new Path();//need path to draw triangle triangleLength = mRadius; float leftX = (float) ((2*mRadius-Math.sqrt(3.0)/2*triangleLength)/2); float realX = (float) (leftX+leftX*0.2); mPath.moveTo(realX,mRadius-(triangleLength/2)); mPath.lineTo(realX,mRadius+(triangleLength/2)); mPath.lineTo((float) (realX+Math.sqrt(3.0)/2*triangleLength),mRadius); mPath.lineTo(realX,mRadius-(triangleLength/2)); } public Status getStatus() { return mStatus; } public void setStatus(Status status) { mStatus = status; invalidate(); } /** * dp 2 px * * @param dpVal */ protected int dp2px(int dpVal) { return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dpVal, getResources().getDisplayMetrics()); } /** * sp 2 px * * @param spVal * @return */ protected int sp2px(int spVal) { return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, spVal, getResources().getDisplayMetrics()); } @Override protected synchronized void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int heightMode = MeasureSpec.getMode(heightMeasureSpec); int widthMode = MeasureSpec.getMode(widthMeasureSpec); int paintWidth = Math.max(mReachedProgressBarHeight, mUnReachedProgressBarHeight); if (heightMode != MeasureSpec.EXACTLY) { int exceptHeight = (int) (getPaddingTop() + getPaddingBottom() + mRadius * 2 + paintWidth); heightMeasureSpec = MeasureSpec.makeMeasureSpec(exceptHeight, MeasureSpec.EXACTLY); } if (widthMode != MeasureSpec.EXACTLY) { int exceptWidth = (int) (getPaddingLeft() + getPaddingRight() + mRadius * 2 + paintWidth); widthMeasureSpec = MeasureSpec.makeMeasureSpec(exceptWidth, MeasureSpec.EXACTLY); } super.onMeasure(widthMeasureSpec, heightMeasureSpec); } @Override protected synchronized void onDraw(Canvas canvas) { super.onDraw(canvas); canvas.save(); canvas.translate(getPaddingLeft(), getPaddingTop()); mPaint.setStyle(Paint.Style.STROKE); // draw unreaded bar mPaint.setColor(mUnReachedBarColor); mPaint.setStrokeWidth(mUnReachedProgressBarHeight); canvas.drawCircle(mRadius, mRadius, mRadius, mPaint); // draw reached bar mPaint.setColor(mReachedBarColor); mPaint.setStrokeWidth(mReachedProgressBarHeight); float sweepAngle = getProgress() * 1.0f / getMax() * 360; canvas.drawArc(new RectF(0, 0, mRadius * 2, mRadius * 2), 0, sweepAngle, false, mPaint); if (mStatus==Status.End){ mPaint.setStyle(Paint.Style.FILL); canvas.drawPath(mPath,mPaint); }else{ mPaint.setStyle(Paint.Style.STROKE); mPaint.setStrokeWidth(dp2px(5)); canvas.drawLine(mRadius*2/3,mRadius*2/3,mRadius*2/3,2*mRadius*2/3,mPaint); canvas.drawLine(2*mRadius-(mRadius*2/3),mRadius*2/3,2*mRadius-(mRadius*2/3),2*mRadius*2/3,mPaint); } canvas.restore(); } public enum Status{ End, Starting } }