//背景圆角矩形的宽度

private int mBgWidth;

//背景圆角矩形的颜色

private int mBgColor;

//圆角矩形的圆角半径

private int mBgCornerRadius;

//内圆的半径

private int mInnerRadius;

//内圆的颜色

private int mInnerColor;

//最外层的半径（内圆半径+进度条的宽度）

private int mEdgeRadius;

//最外层的颜色

private int mEdgeColor;

//圆环（会动的进度条）的宽度

private int mRingWidth;

//圆环的颜色（进度条的颜色）

private int mRingColor;

//百分比的颜色

private int mPercentColor;

//百分比的大小

private int mPercentSize;

//内圆画笔

private Paint mInnerPaint;

//圆环（进度条）画笔

private Paint mRingPaint;

//最外层画笔

private Paint mEdgePaint;

//百分数文字画笔

private Paint mPercentPaint;

//背景（圆角矩形）画笔

private Paint mBgPaint;

//文字（百分比）的宽度

private float mTextWidth;

//文字（百分比）的高度

private float mTextHeight;

//控件中心的X轴位置

private int centerX;

//控件中心的Y轴位置

private int centerY;

//背景圆角矩形

private RectF mBgRect;

//圆弧外切的矩形

private RectF mOval;

//当前进度

private int mCurrentProgress = 0;

//总进度

private int mTotalProgress = 1;

//百分比（外部直接设置百分比）

private int mPercent;

public LofterProgressView(Context context) {

this(context, null);

}

public LofterProgressView(Context context, @Nullable AttributeSet attrs) {

this(context, attrs, 0);

}

public LofterProgressView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {

super(context, attrs, defStyleAttr);

//先获取自定义的配置

initAttrs(context, attrs);

//再进行画笔的初始化

initProSettings();

}

/**

* 初始化自定义的配置

*

* @param context context

* @param attrs attrs

*/

private void initAttrs(Context context, @Nullable AttributeSet attrs) {

TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.ProgressView);

mBgWidth = typedArray.getDimensionPixelSize(R.styleable.ProgressView_bgWidth, 210);

mBgColor = typedArray.getColor(R.styleable.ProgressView_bgColor, Color.WHITE);

mBgCornerRadius = typedArray.getDimensionPixelSize(R.styleable.ProgressView_bgCornerRadius, 28);

mInnerRadius = typedArray.getDimensionPixelSize(R.styleable.ProgressView_innerRadius, 50);

mInnerColor = typedArray.getColor(R.styleable.ProgressView_innerColor, Color.WHITE);

mEdgeColor = typedArray.getColor(R.styleable.ProgressView_edgeColor, getResources().getColor(R.color.default_edge_color));

mRingWidth = typedArray.getDimensionPixelSize(R.styleable.ProgressView_ringWidth, 5);

mRingColor = typedArray.getColor(R.styleable.ProgressView_ringColor, getResources().getColor(R.color.default_ring_color));

mPercentColor = typedArray.getColor(R.styleable.ProgressView_percentColor, Color.GRAY);

mPercentSize = typedArray.getDimensionPixelSize(R.styleable.ProgressView_percentSize, 30);

typedArray.recycle();

}

/**

* 初始化配置

*/

private void initProSettings() {

mInnerPaint = new Paint(Paint.ANTI_ALIAS_FLAG);

mInnerPaint.setColor(mInnerColor);

mInnerPaint.setStrokeCap(Paint.Cap.ROUND);//设置笔触为圆形

mInnerPaint.setStyle(Paint.Style.FILL);

mRingPaint = new Paint(Paint.ANTI_ALIAS_FLAG);

mRingPaint.setColor(mRingColor);

mRingPaint.setStrokeCap(Paint.Cap.ROUND);

mRingPaint.setStrokeWidth(mRingWidth);

mRingPaint.setStyle(Paint.Style.STROKE);

mEdgePaint = new Paint(Paint.ANTI_ALIAS_FLAG);

mEdgePaint.setColor(mEdgeColor);

mEdgePaint.setStrokeCap(Paint.Cap.ROUND);

mEdgePaint.setStrokeWidth(mRingWidth);

mEdgePaint.setStyle(Paint.Style.STROKE);

//字体的画笔

mPercentPaint = new Paint(Paint.ANTI_ALIAS_FLAG);

mPercentPaint.setColor(mPercentColor);

mPercentPaint.setStyle(Paint.Style.FILL);

mPercentPaint.setTextSize(mPercentSize);

//计算字体的高度

Paint.FontMetrics fm = mPercentPaint.getFontMetrics();

mTextHeight = (int) Math.ceil(fm.descent - fm.ascent);

mBgPaint = new Paint(Paint.ANTI_ALIAS_FLAG);

mBgPaint.setColor(mBgColor);

mBgPaint.setStyle(Paint.Style.FILL);

mOval = new RectF();

mBgRect = new RectF();

mEdgeRadius = mInnerRadius + mRingWidth;

}

@Override

protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

super.onMeasure(widthMeasureSpec, heightMeasureSpec);

centerX = getMeasuredWidth() / 2;

centerY = getMeasuredHeight() / 2;

//计算好bg圆角矩形的位置

mBgRect.set(centerX - (mBgWidth / 2), centerY - (mBgWidth / 2), centerX + (mBgWidth / 2), centerY + (mBgWidth / 2));

//计算外切矩形的位置

mOval.left = (centerX - mInnerRadius);

mOval.top = (centerY - mInnerRadius);

mOval.right = centerX + mInnerRadius;

mOval.bottom = centerY + mInnerRadius;

}

@Override

protected void onDraw(Canvas canvas) {

super.onDraw(canvas);

//画背景，圆角矩形

canvas.drawRoundRect(mBgRect, mBgCornerRadius, mBgCornerRadius, mBgPaint);

//画内圆

canvas.drawCircle(centerX, centerY, mInnerRadius, mInnerPaint);

//画外层的圆环，相当于进度为0时候的显示

canvas.drawCircle(centerX, centerY, mInnerRadius, mEdgePaint);

float progress;

String percentText;

if (mPercent != 0) {

progress = (float) mPercent / 100 * 360;

percentText = mPercent + "%";

} else {

progress = (float) mCurrentProgress / mTotalProgress * 360;

percentText = (int) (mCurrentProgress * 1.0f / mTotalProgress * 100) + "%";

}

//画进度条圆环

canvas.drawArc(mOval, -90, progress, false, mRingPaint);

//画百分比

mTextWidth = mPercentPaint.measureText(percentText, 0, percentText.length());

canvas.drawText(percentText, centerX - mTextWidth / 2, centerY + mTextHeight / 4, mPercentPaint);

}

/**

* 外部接口，设置当前进度

*

* @param progress 进度

*/

public synchronized void setProgress(int progress) {

this.mCurrentProgress = progress;

postInvalidate();

}

/**

* 外部接口，设置总进度

*

* @param totalProgress 总进度

*/

public synchronized void setTotalProgress(int totalProgress) {

this.mTotalProgress = totalProgress;

}

/**

* 直接从外部设置百分比

*

* @param percent 百分比

*/

public synchronized void setPercent(int percent) {

this.mPercent = percent;

postInvalidate();

}