StepCircleStaffView

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StepCircleStaffView

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Android自定义View和属性动画完美结合,创造出酷炫圆环动画,带标尺和进度

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#Android自定义View和属性动画完美结合,创造出酷炫圆环动画,带标尺和进度
>无意中，在看了[【Android自定义View实战】之仿QQ运动步数圆弧及动画，Dylan计步中的控件StepArcView](http://blog.csdn.net/linglongxin24/article/details/52936609) 这个之后，突然发奇想，想做这么一个图。在原来的基础上增加一些东西，这样会更好一点。内容更丰富。

>主要是在原来的基础上添加了如下功能

* 1.进度圆环的颜色是渐变。
 * 2.添加一个进度标尺，类似与钟表表盘的样子，用来显示刻度。
 * 3.添加一个进度指示器，三角形的样子，用来显示进度。
 
 效果图如下
 
![效果图](https://github.com/linglongxin24/StepCircleStaffView/blob/master/screenshorts/effect.gif?raw=true)

>下面，就针对这三个变化来说明一下：

#一.渐变的圆环颜色

```
        /**
         * 设置圆形渐变
         * 【第一个参数】：中心点x坐标
         * 【第二个参数】：中心点y坐标
         * 【第三个参数】：渐变的颜色数组
         * 【第四个参数】：渐变的颜色数组对应的相对位置
         */
        paintCurrent.setShader(new SweepGradient(centerX, centerX, new int[]{getResources().getColor(R.color.start_color), getResources().getColor(R.color.end_color)}, null));

```

#二.画三角形进度指示器
 * 1.拿到一个资源图片对象
``` 
        /**
         * 通过这个拿到一个资源图片对象
         */
        bitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.arrow);
```

* 2.计算三角形移动轨迹的坐标
 
 ```
     /**
      * 为进度设置动画
      * ValueAnimator是整个属性动画机制当中最核心的一个类，属性动画的运行机制是通过不断地对值进行操作来实现的，
      * 而初始值和结束值之间的动画过渡就是由ValueAnimator这个类来负责计算的。
      * 它的内部使用一种时间循环的机制来计算值与值之间的动画过渡，
      * 我们只需要将初始值和结束值提供给ValueAnimator，并且告诉它动画所需运行的时长，
      * 那么ValueAnimator就会自动帮我们完成从初始值平滑地过渡到结束值这样的效果。
      *
      * @param last
      * @param current
      */
     @RequiresApi(api = Build.VERSION_CODES.HONEYCOMB)
     private void setAnimation(float last, float current, int length) {
         ValueAnimator progressAnimator = ValueAnimator.ofFloat(last, current);
         progressAnimator.setDuration(length);
         progressAnimator.setTarget(currentAngleLength);
         progressAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
             @Override
             public void onAnimationUpdate(ValueAnimator animation) {
                 /**每次要绘制的圆弧角度**/
                 currentAngleLength = (float) animation.getAnimatedValue();
 
                 /**要绘制的三角形指示器的半径**/
                 float radius=centerX - borderWidth-bitmap.getHeight();
                 /**要绘制的三角形指示器的x坐标**/
                 point.x = (float) (centerX +radius * Math.cos((startAngle + currentAngleLength) * Math.PI / 180));
                 /**要绘制的三角形指示器的y坐标**/
                 point.y = (float) (centerX + radius* Math.sin((startAngle + currentAngleLength) * Math.PI / 180));
                 Log.d("stepView", point + "");
 
                 /**要绘制的圆弧多绘制的部分减掉**/
                 double subtractionScale = borderWidth/2/(centerX*2*Math.PI);
                 double subtractionAngle=subtractionScale*angleLength;
                 if(currentAngleLength>subtractionAngle){
                     currentAngleLength-=subtractionAngle;
                 }
                 invalidate();
             }
         });
         progressAnimator.start();
     }
 ```
 
 * 3.调整旋转的角度后绘制三角形指示器
 
 ```
    /**
      * 5.画三角形
      *
      * @param canvas
      */
     private void drawBitmap(Canvas canvas) {
         // 定义矩阵对象
         Matrix matrix = new Matrix();
         // 参数为正则向右旋转
         matrix.postRotate(startAngle + currentAngleLength + 90);
         Bitmap dstbmp = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(),
                 matrix, true);
         Paint mBitmapPaint = new Paint(Paint.DITHER_FLAG);//这里不管怎么设置都不影响最终图像
         canvas.drawBitmap(dstbmp, point.x - dstbmp.getWidth() / 2, point.y - dstbmp.getHeight() / 2, mBitmapPaint);
     }
 ```
 #三.绘制进度表尺的钟表仪表盘
 
 ```
     /**
      * 6. 画钟表线
      *
      * @param canvas
      */
     private void drawLine(Canvas canvas) {
         Paint mPaint = new Paint();
         mPaint.setStrokeWidth(5);
         mPaint.setColor(getResources().getColor(R.color.start_color));
         /**要绘制的表盘线的总数**/
         int count = 60;
         /**要绘制的表盘每个间隔线条之间的夹角**/
         int avgAngle = (360 / (count - 1));
         /**要绘制的表盘的最长的半径**/
         float radius = centerX - borderWidth - bitmap.getHeight() - 20;
         /**要绘制的表盘线条长度**/
         int lineLength = 25;
         /**起始点**/
         PointF point1 = new PointF();
         /**终止点**/
         PointF point2 = new PointF();
         for (int i = 0; i < count; i++) {
             int angle = avgAngle * i;
             /**起始点坐标**/
             point1.x = centerX + (float) Math.cos(angle * (Math.PI / 180)) * radius;
             point1.y = centerX + (float) Math.sin(angle * (Math.PI / 180)) * radius;
 
             /**终止点坐标**/
             point2.x = centerX + (float) Math.cos(angle * (Math.PI / 180)) * (radius - lineLength);
             point2.y = centerX + (float) Math.sin(angle * (Math.PI / 180)) * (radius - lineLength);
 
             /**画线**/
             canvas.drawLine(point1.x, point1.y, point2.x, point2.y, mPaint);
         }
     }

```
 
 #四.完整代码
 
 ```
 package cn.bluemobi.dylan.stepcirclestaffview;
 
 /**
  * Created by yuandl on 2016-11-08.
  */
 
 import android.animation.ValueAnimator;
 import android.content.Context;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.LinearGradient;
 import android.graphics.Matrix;
 import android.graphics.Paint;
 import android.graphics.PointF;
 import android.graphics.RadialGradient;
 import android.graphics.Rect;
 import android.graphics.RectF;
 import android.graphics.Shader;
 import android.graphics.SweepGradient;
 import android.graphics.Typeface;
 import android.os.Build;
 import android.support.annotation.RequiresApi;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.view.View;
 
 import java.util.logging.Logger;
 
 
 /**
  * Created by DylanAndroid on 2016/5/26.
  * 显示步数的圆弧
  */
 public class StepArcView extends View {
 
     /**
      * 圆弧的宽度
      */
     private float borderWidth = 38f;
     /**
      * 画步数的数值的字体大小
      */
     private float numberTextSize = 0;
     /**
      * 步数
      */
     private String stepNumber = "0";
     /**
      * 开始绘制圆弧的角度
      */
     private float startAngle = 90;
     /**
      * 终点对应的角度和起始点对应的角度的夹角
      */
     private float angleLength = 360;
     /**
      * 所要绘制的当前步数的红色圆弧终点到起点的夹角
      */
     private float currentAngleLength = 0;
     /**
      * 动画时长
      */
     private int animationLength = 3000;
 
     private PointF point;
     private float centerX;
     private Bitmap bitmap;
     private int totalStepNum;
 
     private void init() {
         point = new PointF();
         /**
          * 通过这个拿到一个资源图片对象
          */
         bitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.arrow);
 
 
     }
 
     public StepArcView(Context context) {
         super(context);
         init();
 
     }
 
 
     public StepArcView(Context context, AttributeSet attrs) {
         super(context, attrs);
         init();
     }
 
     public StepArcView(Context context, AttributeSet attrs, int defStyleAttr) {
         super(context, attrs, defStyleAttr);
         init();
     }
 
 
     @Override
     protected void onDraw(Canvas canvas) {
         super.onDraw(canvas);
         /**中心点的x坐标*/
         centerX = (getWidth()) / 2;
         /**指定圆弧的外轮廓矩形区域*/
         RectF rectF = new RectF(0 + borderWidth, borderWidth, 2 * centerX - borderWidth, 2 * centerX - borderWidth);
 
         /**【第一步】绘制整体的黄色圆弧*/
         drawArcYellow(canvas, rectF);
         /**【第二步】绘制当前进度的红色圆弧*/
         drawArcRed(canvas, rectF);
         /**【第三步】绘制当前进度的红色数字*/
         drawTextNumber(canvas, centerX);
         /**【第四步】绘制"步数"的红色数字*/
         drawTextStepString(canvas, centerX);
         /**【第五步】绘制"步数"进度标尺的三角形*/
         drawBitmap(canvas);
         /**【第六步】绘制"步数"进度标尺类似于钟表线隔*/
         drawLine(canvas);
     }
 
 
     /**
      * 1.绘制总步数的黄色圆弧
      *
      * @param canvas 画笔
      * @param rectF  参考的矩形
      */
     private void drawArcYellow(Canvas canvas, RectF rectF) {
         Paint paint = new Paint();
         /** 默认画笔颜色，黄色 */
         paint.setColor(getResources().getColor(R.color.default_color));
         /** 结合处为圆弧*/
         paint.setStrokeJoin(Paint.Join.ROUND);
         /** 设置画笔的样式 Paint.Cap.Round ,Cap.SQUARE等分别为圆形、方形*/
         paint.setStrokeCap(Paint.Cap.ROUND);
         /** 设置画笔的填充样式 Paint.Style.FILL  :填充内部;Paint.Style.FILL_AND_STROKE  ：填充内部和描边;  Paint.Style.STROKE  ：仅描边*/
         paint.setStyle(Paint.Style.STROKE);
         /**抗锯齿功能*/
         paint.setAntiAlias(true);
         /**设置画笔宽度*/
         paint.setStrokeWidth(borderWidth);
 
         /**绘制圆弧的方法
          * drawArc(RectF oval, float startAngle, float sweepAngle, boolean useCenter, Paint paint)//画弧，
          参数一是RectF对象，一个矩形区域椭圆形的界限用于定义在形状、大小、电弧，
          参数二是起始角(度)在电弧的开始，圆弧起始角度，单位为度。
          参数三圆弧扫过的角度，顺时针方向，单位为度,从右中间开始为零度。
          参数四是如果这是true(真)的话,在绘制圆弧时将圆心包括在内，通常用来绘制扇形；如果它是false(假)这将是一个弧线,
          参数五是Paint对象；
          */
         canvas.drawArc(rectF, startAngle, angleLength, false, paint);
 
     }
 
     /**
      * 2.绘制当前步数的红色圆弧
      */
     private void drawArcRed(Canvas canvas, RectF rectF) {
         Paint paintCurrent = new Paint();
         paintCurrent.setStrokeJoin(Paint.Join.ROUND);
         paintCurrent.setStrokeCap(Paint.Cap.SQUARE);//圆角弧度
         paintCurrent.setStyle(Paint.Style.STROKE);//设置填充样式
         paintCurrent.setAntiAlias(true);//抗锯齿功能
         paintCurrent.setStrokeWidth(borderWidth);//设置画笔宽度
         /**
          * 设置圆形渐变
          * 【第一个参数】：中心点x坐标
          * 【第二个参数】：中心点y坐标
          * 【第三个参数】：渐变的颜色数组
          * 【第四个参数】：渐变的颜色数组对应的相对位置
          */
         paintCurrent.setShader(new SweepGradient(centerX, centerX, new int[]{getResources().getColor(R.color.start_color), getResources().getColor(R.color.end_color)}, null));
         canvas.drawArc(rectF, startAngle, currentAngleLength, false, paintCurrent);
     }
 
     /**
      * 3.圆环中心的步数
      */
     private void drawTextNumber(Canvas canvas, float centerX) {
         Paint vTextPaint = new Paint();
         vTextPaint.setTextAlign(Paint.Align.CENTER);
         vTextPaint.setAntiAlias(true);//抗锯齿功能
         vTextPaint.setTextSize(numberTextSize);
         Typeface font = Typeface.create(Typeface.SANS_SERIF, Typeface.NORMAL);
         vTextPaint.setTypeface(font);//字体风格
         vTextPaint.setColor(getResources().getColor(R.color.center_text_color));
         Rect bounds_Number = new Rect();
         vTextPaint.getTextBounds(stepNumber, 0, stepNumber.length(), bounds_Number);
         canvas.drawText(stepNumber, centerX, getHeight() / 2 + bounds_Number.height() / 2, vTextPaint);
 
     }
 
     /**
      * 4.圆环中心[步数]的文字
      */
     private void drawTextStepString(Canvas canvas, float centerX) {
         Paint vTextPaint = new Paint();
         vTextPaint.setTextSize(dipToPx(13));
         vTextPaint.setTextAlign(Paint.Align.CENTER);
         vTextPaint.setAntiAlias(true);//抗锯齿功能
         vTextPaint.setColor(getResources().getColor(R.color.other_text_color));
         String stepString = "目标 "+totalStepNum;
         Rect bounds = new Rect();
         vTextPaint.getTextBounds(stepString, 0, stepString.length(), bounds);
         canvas.drawText(stepString, centerX, getHeight() / 2 + bounds.height() + getFontHeight(numberTextSize), vTextPaint);
         canvas.save();
          stepString = "今天步数";
          bounds = new Rect();
         vTextPaint.getTextBounds(stepString, 0, stepString.length(), bounds);
         canvas.drawText(stepString, centerX, getHeight() / 2  - getFontHeight(numberTextSize), vTextPaint);
 
     }
 
     /**
      * 5.画三角形
      *
      * @param canvas
      */
     private void drawBitmap(Canvas canvas) {
         // 定义矩阵对象
         Matrix matrix = new Matrix();
         // 参数为正则向右旋转
         matrix.postRotate(startAngle + currentAngleLength + 90);
         Bitmap dstbmp = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(),
                 matrix, true);
         Paint mBitmapPaint = new Paint(Paint.DITHER_FLAG);//这里不管怎么设置都不影响最终图像
         canvas.drawBitmap(dstbmp, point.x - dstbmp.getWidth() / 2, point.y - dstbmp.getHeight() / 2, mBitmapPaint);
     }
 
     /**
      * 6. 画钟表线
      *
      * @param canvas
      */
     private void drawLine(Canvas canvas) {
         Paint mPaint = new Paint();
         mPaint.setStrokeWidth(5);
         mPaint.setColor(getResources().getColor(R.color.start_color));
         /**要绘制的表盘线的总数**/
         int count = 60;
         /**要绘制的表盘每个间隔线条之间的夹角**/
         int avgAngle = (360 / (count - 1));
         /**要绘制的表盘的最长的半径**/
         float radius = centerX - borderWidth - bitmap.getHeight() - 20;
         /**要绘制的表盘线条长度**/
         int lineLength = 25;
         /**起始点**/
         PointF point1 = new PointF();
         /**终止点**/
         PointF point2 = new PointF();
         for (int i = 0; i < count; i++) {
             int angle = avgAngle * i;
             /**起始点坐标**/
             point1.x = centerX + (float) Math.cos(angle * (Math.PI / 180)) * radius;
             point1.y = centerX + (float) Math.sin(angle * (Math.PI / 180)) * radius;
 
             /**终止点坐标**/
             point2.x = centerX + (float) Math.cos(angle * (Math.PI / 180)) * (radius - lineLength);
             point2.y = centerX + (float) Math.sin(angle * (Math.PI / 180)) * (radius - lineLength);
 
             /**画线**/
             canvas.drawLine(point1.x, point1.y, point2.x, point2.y, mPaint);
         }
     }
 
     /**
      * 获取当前步数的数字的高度
      *
      * @param fontSize 字体大小
      * @return 字体高度
      */
     public int getFontHeight(float fontSize) {
         Paint paint = new Paint();
         paint.setTextSize(fontSize);
         Rect bounds_Number = new Rect();
         paint.getTextBounds(stepNumber, 0, stepNumber.length(), bounds_Number);
         return bounds_Number.height();
     }
 
     /**
      * dip 转换成px
      *
      * @param dip
      * @return
      */
 
     private int dipToPx(float dip) {
         float density = getContext().getResources().getDisplayMetrics().density;
         return (int) (dip * density + 0.5f * (dip >= 0 ? 1 : -1));
     }
 
     /**
      * 所走的步数进度
      *
      * @param totalStepNum  设置的步数
      * @param currentCounts 所走步数
      */
     @RequiresApi(api = Build.VERSION_CODES.HONEYCOMB)
     public void setCurrentCount(int totalStepNum, int currentCounts) {
         this.totalStepNum = totalStepNum;
         stepNumber = currentCounts + "";
         setTextSize(currentCounts);
         /**如果当前走的步数超过总步数则圆弧还是270度，不能成为园*/
         if (currentCounts > totalStepNum) {
             currentCounts = totalStepNum;
         }
 
         /**所走步数占用总共步数的百分比*/
         float scale = (float) currentCounts / totalStepNum;
         /**换算成弧度最后要到达的角度的长度-->弧长*/
         float currentAngleLength = scale * angleLength;
         /**开始执行动画*/
         setAnimation(0, currentAngleLength, animationLength);
     }
 
     /**
      * 为进度设置动画
      * ValueAnimator是整个属性动画机制当中最核心的一个类，属性动画的运行机制是通过不断地对值进行操作来实现的，
      * 而初始值和结束值之间的动画过渡就是由ValueAnimator这个类来负责计算的。
      * 它的内部使用一种时间循环的机制来计算值与值之间的动画过渡，
      * 我们只需要将初始值和结束值提供给ValueAnimator，并且告诉它动画所需运行的时长，
      * 那么ValueAnimator就会自动帮我们完成从初始值平滑地过渡到结束值这样的效果。
      *
      * @param last
      * @param current
      */
     @RequiresApi(api = Build.VERSION_CODES.HONEYCOMB)
     private void setAnimation(float last, float current, int length) {
         ValueAnimator progressAnimator = ValueAnimator.ofFloat(last, current);
         progressAnimator.setDuration(length);
         progressAnimator.setTarget(currentAngleLength);
         progressAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
             @Override
             public void onAnimationUpdate(ValueAnimator animation) {
                 /**每次要绘制的圆弧角度**/
                 currentAngleLength = (float) animation.getAnimatedValue();
 
                 /**要绘制的三角形指示器的半径**/
                 float radius=centerX - borderWidth-bitmap.getHeight();
                 /**要绘制的三角形指示器的x坐标**/
                 point.x = (float) (centerX +radius * Math.cos((startAngle + currentAngleLength) * Math.PI / 180));
                 /**要绘制的三角形指示器的y坐标**/
                 point.y = (float) (centerX + radius* Math.sin((startAngle + currentAngleLength) * Math.PI / 180));
                 Log.d("stepView", point + "");
 
                 /**要绘制的圆弧多绘制的部分减掉**/
                 double subtractionScale = borderWidth/2/(centerX*2*Math.PI);
                 double subtractionAngle=subtractionScale*angleLength;
                 if(currentAngleLength>subtractionAngle){
                     currentAngleLength-=subtractionAngle;
                 }
                 invalidate();
             }
         });
         progressAnimator.start();
     }
 
     /**
      * 设置文本大小,防止步数特别大之后放不下，将字体大小动态设置
      *
      * @param num
      */
     public void setTextSize(int num) {
         String s = String.valueOf(num);
         int length = s.length();
         if (length <= 4) {
             numberTextSize = dipToPx(40);
         } else if (length > 4 && length <= 6) {
             numberTextSize = dipToPx(30);
         } else if (length > 6 && length <= 8) {
             numberTextSize = dipToPx(25);
         } else if (length > 8) {
             numberTextSize = dipToPx(20);
         }
     }
 
 }

```
 
 #五.[GitHub](https://github.com/linglongxin24/StepCircleStaffView)

StepCircleStaffView

StepCircleStaffView Latest Version Download

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