Android进阶之自定义View(2)高仿钉钉运动步数实现可动

作者: 一只懂音乐的码虫 | 来源:发表于2018-08-09 10:12 被阅读271次

    接着上篇Android进阶之自定义控件(2)高仿钉钉运动步数实现可动的进度圆环(上)的基础,我们来实现钉钉运动的效果:

    《一》View效果分析:

    对钉钉运动的效果进行分析:
    1、圆弧应该是从135°起,绘制了270°。
    2、步数小于10000步时,背景圆弧为灰色,进度圆弧为蓝色渐变色;步数大于10000步时,进度圆弧为渐变的黄色
    3、需要绘制中间的步数及步数上面的名次
    4、实现步数及进度的动态变化


    dingding.gif

    有了上篇的基础,实现钉钉运动步数的效果,就很简单了。还是先看一下我最终实现的高仿版效果,给大家点信心。变化的速度可以配置:


    高仿钉钉运动效果.gif

    《二》实现步骤分解:

    (1)绘制灰色背景圆弧,135°起,绘制了270°
    canvas.drawArc(oval, 135, 270, false, mPaint);
    
    (2)绘制进度圆弧
     canvas.drawArc(oval, 0 + 135, mCurrentStep/ mMaxStep * 270, false, mProgressPaint);
    
    (3)绘制文字很简单,只需要以正中间的文字为标准,往上移动一个textRect.height()和文字之间的间距textPadding即可。上篇这些基础的知识及需要注意的小细节都有详细的讲解,不多做解释。到此步骤,实现的效果如下:
     //绘制中间的步数的文字
      Rect textRect = new Rect();
      String mShowText = (int) mCurrentStep + "";
      mTextPaint.setTextSize(sp2px(mTextSize));
      mTextPaint.getTextBounds(mShowText, 0, mShowText.length(), textRect);
      canvas.drawText(mShowText, getWidth() / 2 - textRect.width() / 2, getHeight() / 2 + textRect.height() / 2, mTextPaint);
    
     //绘制排名的文字,在步数文字的上方
     String mRandText = "第4名";//使用时,名次动态传入即可,此处写死为了测试
     mTextPaint.setTextSize(sp2px(mRandTextSize));
     mTextPaint.getTextBounds(mRandText, 0, mRandText.length(), textRect);
     canvas.drawText(mRandText, getWidth() / 2 - textRect.width() / 2, getHeight() / 2 + textRect.height() / 2 - (textRect.height() + textPadding), mTextPaint);
    
    image.png
    (4)可以看到,上图还是静态的效果,接下来我们通过两种方式来让进度圆弧和文字动起来。

    1、方法一:还是上篇讲解过的方法,通过开分线程的方式,不断更新进度值,不断重绘。

            new Thread(new Runnable() {
                @Override
                public void run() {
                    setCurrentStep(0);
                    float changeProgress = currentStep;
                    for (float i = 0; i < changeProgress; i++) {
                        setCurrentStep(getCurrentStep() + rate);
                        SystemClock.sleep(20);
    //                  invalidate();//invalidate()必须在主线程中执行,此处不能使用
    //                  postInvalidate();//强制重绘,postInvalidate()可以在主线程也可以在分线程中执行
                        changeProgress = changeProgress - rate;
                    }
                    //由于上面的循环结束时,可能计算后最终无法到达mCurrentProgress的值,所以在循环结束后,将mCurrentProgress重新设置
                    setCurrentStep(currentStep);
                }
            }).start();
      
    

    2、方法二:使用属性动画和差值器实现

     ValueAnimator valueAnimator = ObjectAnimator.ofFloat(0, currentStep);
            valueAnimator.setDuration(1000);
            valueAnimator.setInterpolator(new DecelerateInterpolator());
            valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
                @Override
                public void onAnimationUpdate(ValueAnimator animation) {
                    float currentStep = (float) animation.getAnimatedValue();
                    setCurrentStep((int) currentStep);
                }
            });
            valueAnimator.start();
    
    (5)最后一步了,来看看渐变色的进度圆弧如何处理。

    处理渐变有两个类:
    1、线性渐变:LinearGradient
    2、扫描式渐变:SweepGradient ——在中心点画一个扫描梯度的着色器
    很明显,在这里我们需要用到SweepGradient来处理,如下,给画笔设置Shader,简单的设置如下。


    image.png
    int[] mGradientColorArray = new int[]{ContextCompat.getColor(mContext, R.color.color_5e9fff),  ContextCompat.getColor(mContext, R.color.color_4fd8f5), ContextCompat.getColor(mContext, R.color.color_5e9fff)};
    SweepGradient shader = new SweepGradient(getWidth() / 2 - mRoundWidth / 2, getWidth() / 2 - mRoundWidth / 2, mGradientColorArray, null);
    mProgressPaint.setShader(shader);
    
    image.png

    还是和钉钉的效果有点区别,钉钉的圆弧两边是浅色的,上面顶部的部分是深色的,我们稍作处理一下,代码如下:


    image.png
             /**
             *  处理渐变色
             */
            //渐变颜色数组
            int[] mGradientColorArray = new int[]{ContextCompat.getColor(mContext, R.color.color_4fd8f5), ContextCompat.getColor(mContext, R.color.color_4fd8f5), ContextCompat.getColor(mContext, R.color.color_5e9fff), ContextCompat.getColor(mContext, R.color.color_4fd8f5)};
            int count = mGradientColorArray.length;
            int[] colors = new int[count];
            System.arraycopy(mGradientColorArray, 0, colors, 0, count);
            float[] positions = new float[count];
            //由于此处绘制的是不完整的圆弧,故需要额外处理一下变化的比例值
            float v = (360f / 270);
            positions[0] = 0.0f;
            positions[1] = 0.33f * v;
            positions[2] = 0.67f * v;
            positions[3] = 1.0f;
            SweepGradient shader = new SweepGradient(getWidth() / 2 - mRoundWidth / 2, getWidth() / 2 - mRoundWidth / 2, mGradientColorArray, positions);
            mProgressPaint.setShader(shader);
    

    渐变的效果搞定。


    image.png

    测试代码,在使用的地方调用startCountStep()即可,是不是敲极简单:

       //当前实际的步数
          float   mCurrentStep = 9709;
          sportStepView.startCountStep(mCurrentStep);
    

    View的完整代码:

    package com.example.jojo.learn.customview;
    
    import android.animation.ObjectAnimator;
    import android.animation.ValueAnimator;
    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.graphics.SweepGradient;
    import android.support.annotation.Nullable;
    import android.support.v4.content.ContextCompat;
    import android.util.AttributeSet;
    import android.util.TypedValue;
    import android.view.View;
    import android.view.animation.DecelerateInterpolator;
    
    import com.example.jojo.learn.R;
    
    /**
     * Created by JoJo on 2018/8/1.
     * wechat:18510829974
     * description: 仿钉钉运动步数效果
     */
    
    public class SportStepView extends View {
    
    
        private Context mContext;
        //内圆环颜色
        private int innerRoundColor;
        //外圆环颜色
        private int outerRoundColor;
        //绘制背景圆环的画笔
        private Paint mPaint;
        //绘制外面进度的圆环的画笔
        private Paint mProgressPaint;
        //绘制外面进度的圆环的画笔
        private Paint mTextPaint;
        //背景圆弧的绘制的宽度
        private int mRoundWidth = 10;
        //进度圆环的宽度
        private float mProgressRoundWidth = 15;
        //中间步数文字的大小
        private int mTextSize = 40;//单位 sp
        //名次文字大小
        private int mRandTextSize = 15;
        //圆环最大进度
        private int mMaxStep = 10000;
        //圆环当前进度
        private float mCurrentStep = 0;
        //排名与步数文字直接的间隔
        private float textPadding = 80;
        //速度,值越大,变化速度越快
        private float rate = 128;
    
        public SportStepView(Context context) {
            this(context, null);
        }
    
        public SportStepView(Context context, @Nullable AttributeSet attrs) {
            this(context, attrs, 0);
        }
    
        public SportStepView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
            super(context, attrs, defStyleAttr);
            this.mContext = context;
            TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.SportStepView);
            innerRoundColor = typedArray.getColor(R.styleable.SportStepView_innerRoundColor, ContextCompat.getColor(mContext, R.color.color_e4e4e4));
            outerRoundColor = typedArray.getColor(R.styleable.SportStepView_outerRoundColor, ContextCompat.getColor(mContext, R.color.color_4fd8f5));
    
            init();
        }
    
        @Override
        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
            //获取宽的模式
            int widthMode = MeasureSpec.getMode(widthMeasureSpec);
            int heightMode = MeasureSpec.getMode(heightMeasureSpec);
            //获取宽的尺寸
            int widthSize = MeasureSpec.getSize(widthMeasureSpec);
            int heightSize = MeasureSpec.getSize(heightMeasureSpec);
    
            //对wrap_content这种模式进行处理
            if (heightMode == MeasureSpec.AT_MOST) {
                heightSize = widthSize;
            }
            //以宽度为标准保存丈量结果
            setMeasuredDimension(widthSize, heightSize);
        }
    
        private void init() {
            mPaint = new Paint();
            mPaint.setAntiAlias(true);
            mPaint.setStyle(Paint.Style.STROKE);
            mPaint.setColor(innerRoundColor);
            mPaint.setStrokeCap(Paint.Cap.ROUND);// 圆形笔头
            mPaint.setStrokeWidth(mRoundWidth);
    
            mProgressPaint = new Paint();
            mProgressPaint.setAntiAlias(true);// 抗锯齿效果
            mProgressPaint.setStyle(Paint.Style.STROKE);
            mProgressPaint.setColor(outerRoundColor);
            mProgressPaint.setStrokeCap(Paint.Cap.ROUND);// 圆形笔头
            mProgressPaint.setStrokeWidth(mProgressRoundWidth);
    
            mTextPaint = new Paint();
            mTextPaint.setAntiAlias(true);// 抗锯齿效果
            mTextPaint.setStyle(Paint.Style.STROKE);
            mTextPaint.setColor(Color.BLACK);
            mTextPaint.setColor(ContextCompat.getColor(mContext, R.color.color_56a9ff));
            mTextPaint.setTextSize(sp2px(mTextSize));
    
    
        }
    
        @Override
        protected void onDraw(Canvas canvas) {
            super.onDraw(canvas);
            /**
             *  处理渐变色
             */
            //默认的渐变颜色数组:
    //        int[] mGradientColorArray = new int[]{ContextCompat.getColor(mContext, R.color.color_5e9fff),  ContextCompat.getColor(mContext, R.color.color_4fd8f5), ContextCompat.getColor(mContext, R.color.color_5e9fff)};
            int[] mGradientColorArray = new int[]{ContextCompat.getColor(mContext, R.color.color_4fd8f5), ContextCompat.getColor(mContext, R.color.color_4fd8f5), ContextCompat.getColor(mContext, R.color.color_5e9fff), ContextCompat.getColor(mContext, R.color.color_4fd8f5)};
            int count = mGradientColorArray.length;
            int[] colors = new int[count];
            System.arraycopy(mGradientColorArray, 0, colors, 0, count);
            float[] positions = new float[count];
            float v = (360f / 270);
            positions[0] = 0.0f;
            positions[1] = 0.33f * v;
            positions[2] = 0.67f * v;
            positions[3] = 1.0f;
            SweepGradient shader = new SweepGradient(getWidth() / 2 - mRoundWidth / 2, getWidth() / 2 - mRoundWidth / 2, mGradientColorArray, positions);
            mProgressPaint.setShader(shader);
    
    
            if (mRoundWidth < mProgressRoundWidth) {
                RectF oval = new RectF(0 + mProgressRoundWidth / 2, 0 + mProgressRoundWidth / 2, getWidth() - mProgressRoundWidth / 2, getWidth() - mProgressRoundWidth / 2);
                //绘制背景圆环
                canvas.drawArc(oval, 135, 270, false, mPaint);
    
                //绘制进度圆环,绘制的角度最大不超过270°
                if (mCurrentStep * 1f / mMaxStep <= 1) {
                    canvas.drawArc(oval, 0 + 135, mCurrentStep / mMaxStep * 270, false, mProgressPaint);
                } else {
                    canvas.drawArc(oval, 0 + 135, 270, false, mProgressPaint);
                }
            } else {
                RectF oval = new RectF(0 + mRoundWidth / 2, 0 + mRoundWidth / 2, getWidth() - mRoundWidth / 2, getWidth() - mRoundWidth / 2);
                //绘制背景圆环
                canvas.drawArc(oval, 135, 270, false, mPaint);
                //绘制进度圆环
                if (mCurrentStep * 1f / mMaxStep <= 1) {
                    canvas.drawArc(oval, 0 + 135, mCurrentStep / mMaxStep * 270, false, mProgressPaint);
                } else {
                    canvas.drawArc(oval, 0 + 135, 270, false, mProgressPaint);
                }
            }
    
            //绘制中间的步数的文字
            Rect textRect = new Rect();
            String mShowText = (int) mCurrentStep + "";
            mTextPaint.setTextSize(
    
                    sp2px(mTextSize));
            mTextPaint.getTextBounds(mShowText, 0, mShowText.length(), textRect);
            canvas.drawText(mShowText, getWidth() / 2 - textRect.width() / 2, getHeight() / 2 + textRect.height() / 2, mTextPaint);
    
            //绘制排名的文字,在步数文字的上方
            String mRandText = "第4名";
            mTextPaint.setTextSize(
    
                    sp2px(mRandTextSize));
            mTextPaint.getTextBounds(mRandText, 0, mRandText.length(), textRect);
            canvas.drawText(mRandText, getWidth() / 2 - textRect.width() / 2, getHeight() / 2 + textRect.height() / 2 - (textRect.height() + textPadding), mTextPaint);
    
    
        }
    
        public void setCurrentStep(float currentStep) {
            this.mCurrentStep = currentStep;
            //强制重绘,postInvalidate()可以在主线程也可以在分线程中执行
            postInvalidate();
        }
    
        public void setMaxProgress(int maxStep) {
            this.mMaxStep = maxStep;
        }
    
        public int getMaxtep() {
            return mMaxStep;
        }
    
        public float getCurrentStep() {
            return mCurrentStep;
        }
    
        /**
         * 将sp转换成px
         *
         * @param sp
         * @return
         */
        private int sp2px(int sp) {
            return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, sp,
                    getResources().getDisplayMetrics());
        }
    
        /**
         * 开始动态计步
         *
         * @param currentStep
         */
        public void startCountStep(final float currentStep) {
            //方法一:开一个分线程,动态改变进度的值,不断绘制达到进度变化的效果
    //        new Thread(new Runnable() {
    //            @Override
    //            public void run() {
    //                setCurrentStep(0);
    //                float changeProgress = currentStep;
    //                for (float i = 0; i < changeProgress; i++) {
    //                    setCurrentStep(getCurrentStep() + rate);
    //                    SystemClock.sleep(20);
    ////                  invalidate();//invalidate()必须在主线程中执行,此处不能使用
    ////                  postInvalidate();//强制重绘,postInvalidate()可以在主线程也可以在分线程中执行
    //                    changeProgress = changeProgress - rate;
    //                }
    //                //由于上面的循环结束时,可能计算后最终无法到达mCurrentProgress的值,所以在循环结束后,将mCurrentProgress重新设置
    //                setCurrentStep(currentStep);
    //            }
    //        }).start();
    
            /**
             * 方法二
             */
            ValueAnimator valueAnimator = ObjectAnimator.ofFloat(0, currentStep);
            valueAnimator.setDuration(1000);
            valueAnimator.setInterpolator(new DecelerateInterpolator());
            valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
                @Override
                public void onAnimationUpdate(ValueAnimator animation) {
                    float currentStep = (float) animation.getAnimatedValue();
                    setCurrentStep((int) currentStep);
                }
            });
            valueAnimator.start();
        }
    }
    
    

    涉及到的自定义属性及color.xml

       <!--SportStepView-->
        <declare-styleable name="SportStepView">
            <!--圆环半径-->
            <attr name="radius" format="dimension"></attr>
            <attr name="outerRoundColor" format="color"></attr>
            <attr name="innerRoundColor" format="color"></attr>
        </declare-styleable>
    
      <color name="color_4fd8f5">#4fd8f5</color>
        <color name="color_5e9fff">#5e9fff</color>
        <color name="color_e4e4e4">#e4e4e4</color>
    

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