Back to project page circular-progress-button.
The source code is released under:
MIT License
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package com.dd; //www .j a v a2 s. c o m import android.graphics.Canvas; import android.graphics.ColorFilter; import android.graphics.Paint; import android.graphics.Path; import android.graphics.Rect; import android.graphics.RectF; import android.graphics.drawable.Drawable; class CircularProgressDrawable extends Drawable { private float mSweepAngle; private float mStartAngle; private int mSize; private int mStrokeWidth; private int mStrokeColor; public CircularProgressDrawable(int size, int strokeWidth, int strokeColor) { mSize = size; mStrokeWidth = strokeWidth; mStrokeColor = strokeColor; mStartAngle = -90; mSweepAngle = 0; } public void setSweepAngle(float sweepAngle) { mSweepAngle = sweepAngle; } public int getSize() { return mSize; } @Override public void draw(Canvas canvas) { final Rect bounds = getBounds(); if (mPath == null) { mPath = new Path(); } mPath.reset(); mPath.addArc(getRect(), mStartAngle, mSweepAngle); mPath.offset(bounds.left, bounds.top); canvas.drawPath(mPath, createPaint()); } @Override public void setAlpha(int alpha) { } @Override public void setColorFilter(ColorFilter cf) { } @Override public int getOpacity() { return 1; } private RectF mRectF; private Paint mPaint; private Path mPath; private RectF getRect() { if (mRectF == null) { int index = mStrokeWidth / 2; mRectF = new RectF(index, index, getSize() - index, getSize() - index); } return mRectF; } private Paint createPaint() { if (mPaint == null) { mPaint = new Paint(); mPaint.setAntiAlias(true); mPaint.setStyle(Paint.Style.STROKE); mPaint.setStrokeWidth(mStrokeWidth); mPaint.setColor(mStrokeColor); } return mPaint; } }