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app/src/main/java/com/lwp/customviewtest/CustomViews/QQStepView.java
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| package com.lwp.customviewtest.CustomViews; | ||
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| import android.content.Context; | ||
| import android.content.res.TypedArray; | ||
| import android.graphics.Canvas; | ||
| import android.graphics.Color; | ||
| import android.graphics.Paint; | ||
| import android.graphics.Rect; | ||
| import android.graphics.RectF; | ||
| import android.util.AttributeSet; | ||
| import android.view.View; | ||
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| import com.lwp.customviewtest.R; | ||
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| /** | ||
| * <pre> | ||
| * author : 李蔚蓬（简书_凌川江雪） | ||
| * time : 2020/8/30 18:50 | ||
| * desc : | ||
| * </pre> | ||
| */ | ||
| public class QQStepView extends View { | ||
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| //初始化 自定义属性变量 并给 默认值 | ||
| private int mOuterColor = Color.RED;//默认红色 | ||
| private int mInnerColor = Color.BLUE;//默认蓝色 | ||
| private int mBorderWidth = 20;//20px | ||
| private int mStepTextSize = 20; | ||
| private int mStepTextColor = Color.RED; | ||
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| private Paint mPaint; | ||
| private int mStartAngle = 135; | ||
| private int mSweepAngle = 270; | ||
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| private int mStepMax = 0; | ||
| private int mCurrentStep = 0; | ||
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| public QQStepView(Context context) { | ||
| this(context, null); | ||
| } | ||
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| public QQStepView(Context context, AttributeSet attrs) { | ||
| this(context, attrs, 0); | ||
| } | ||
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| public QQStepView(Context context, AttributeSet attrs, int defStyleAttr) { | ||
| super(context, attrs, defStyleAttr); | ||
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| //获取自定义属性 | ||
| TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.QQStepView); | ||
| mOuterColor = array.getColor(R.styleable.QQStepView_outerColor, mOuterColor); | ||
| mInnerColor = array.getColor(R.styleable.QQStepView_innerColor, mInnerColor); | ||
| mBorderWidth = (int) array.getDimension(R.styleable.QQStepView_borderWidth, mBorderWidth); | ||
| mStepTextSize = array.getDimensionPixelSize(R.styleable.QQStepView_stepTextSize, mStepTextSize); | ||
| mStepTextColor = array.getColor(R.styleable.QQStepView_stepTextColor, mStepTextColor); | ||
| array.recycle(); | ||
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| mPaint = new Paint(); | ||
| mPaint.setAntiAlias(true); | ||
| mPaint.setStrokeWidth(mBorderWidth); | ||
| mPaint.setColor(mOuterColor); | ||
| mPaint.setStyle(Paint.Style.STROKE); | ||
| } | ||
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| @Override | ||
| protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { | ||
| super.onMeasure(widthMeasureSpec, heightMeasureSpec); | ||
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| // 调用者在布局文件中可能是 wrap_content 要做判断 | ||
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| //获取宽高 | ||
| int widthSize = MeasureSpec.getSize(widthMeasureSpec); | ||
| int heightSize = MeasureSpec.getSize(heightMeasureSpec); | ||
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| //设置宽高 | ||
| // 宽高不一致 取最小值、确保是个正方形 | ||
| setMeasuredDimension(widthSize > heightSize ? heightSize : widthSize, | ||
| widthSize > heightSize ? heightSize : widthSize); | ||
| } | ||
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| @Override | ||
| protected void onDraw(Canvas canvas) { | ||
| super.onDraw(canvas); | ||
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| //画外圆弧============================== | ||
| //拿到View的中心点 | ||
| int centerX = getWidth() / 2; | ||
| int centerY = getHeight() / 2; | ||
| // 半径 | ||
| int radius = (int) (centerX - mBorderWidth); | ||
| // 设置圆弧画笔的宽度 | ||
| mPaint.setStrokeWidth(mBorderWidth); | ||
| // 设置弧线的 首端 和 尾端 为 圆弧 | ||
| mPaint.setStrokeCap(Paint.Cap.ROUND); | ||
| mPaint.setStrokeJoin(Paint.Join.ROUND); | ||
| // 设置画笔颜色 | ||
| mPaint.setColor(mOuterColor); | ||
| mPaint.setStyle(Paint.Style.STROKE); | ||
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| //圆弧 内边缘的弧线的 外切矩形 | ||
| RectF oval = new RectF(mBorderWidth, mBorderWidth, centerX + radius, centerY + radius); | ||
| // 画背景圆弧 | ||
| canvas.drawArc(oval, mStartAngle, mSweepAngle, false, mPaint); | ||
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| //画内圆弧============================== | ||
| // 提供百分比 给用户自己配置 【自定义属性】 | ||
| mPaint.setColor(mInnerColor); | ||
| // 计算当前百分比 | ||
| float percent = (float) mCurrentStep / mStepMax; | ||
| if (mStepMax != 0) { | ||
| // 根据当前百分比计算圆弧扫描的角度 | ||
| canvas.drawArc(oval, mStartAngle, percent * mSweepAngle, false, mPaint); | ||
| } | ||
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| //画文字============================== | ||
| // 重置画笔 | ||
| mPaint.reset(); | ||
| mPaint.setAntiAlias(true); | ||
| mPaint.setTextSize(mStepTextSize); | ||
| mPaint.setColor(mStepTextColor); | ||
| //文本内容 | ||
| // String mStep = ((int) (percent * mStepMax)) + ""; | ||
| String mStep = mCurrentStep + ""; | ||
| // 测量文字的宽高 | ||
| Rect textBounds = new Rect(); | ||
| mPaint.getTextBounds(mStep, 0, mStep.length(), textBounds); | ||
| //文字的x轴起始点 | ||
| int dx = (getWidth() - textBounds.width()) / 2; | ||
| // 获取画笔的FontMetrics | ||
| Paint.FontMetrics fontMetrics = mPaint.getFontMetrics(); | ||
| // 计算文字的基线 | ||
| int baseLine = (int) (getHeight() / 2 + (fontMetrics.bottom - fontMetrics.top) / 2 - fontMetrics.bottom); | ||
| // 绘制步数文字 | ||
| canvas.drawText(mStep, dx, baseLine, mPaint); | ||
| } | ||
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| // 设置当前最大步数 | ||
| public synchronized void setMaxStep(int maxStep) { | ||
| if (maxStep < 0) { | ||
| throw new IllegalArgumentException("max 不能小于0!"); | ||
| } | ||
| this.mStepMax = maxStep; | ||
| } | ||
| public synchronized int getMaxStep() { | ||
| return mStepMax; | ||
| } | ||
| // 设置进度 | ||
| public synchronized void setProgress(int progress) { | ||
| if (progress < 0) { | ||
| throw new IllegalArgumentException("progress 不能小于0!"); | ||
| } | ||
| this.mCurrentStep = progress; | ||
| // 重新刷新绘制 -> onDraw() | ||
| invalidate(); | ||
| } | ||
| public synchronized int getProgress() { | ||
| return mCurrentStep; | ||
| } | ||
| } |
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