Android 圆环带刻度条进度动画效果实现

效果图
圆环带刻度进度

需求是根据传感器做一个重力球效果，先实现了动画后续加上跟传感器联动.
又是摆烂的一天，尚能呼吸，未来可期啊

View源码

package com.android.circlescalebar.view;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PointF;
import android.util.AttributeSet;
import android.view.View;
import com.android.circlescalebar.R;
import com.android.circlescalebar.utils.ChartUtils;
import com.android.circlescalebar.utils.DensityUtils;

public class CircleGearView extends View {

    private Context mContext;
    private Paint mPaint; // 画笔对象的引用
    private PointF mProgressPoint;
    private float mRoundWidth = DensityUtils.dp2px(4); // 圆环的宽度
    private int centerX, centerY;
    private int radius, roundRadius;
    private int paddingOuterThumb;//外边距
    private int minValidateTouchArcRadius; // 最小有效点击半径
    private int maxValidateTouchArcRadius; // 最大有效点击半径
    private int mMainColor; //主题颜色
    private int mInnerRoundColor; //内圆 宽度 、颜色
    private float mInnerRoundWidth;
    private int mTxtProgress = 1; // 显示进度
    private int max = 200; // 最大进度 -- 总共200个刻度 所以这样定义
    private float progress = 1;
    private double mOuterRoundProgress = 0f;//外圈进度
    private boolean mOuterSences = true; //true 正向----false方向

    public CircleGearView(Context context) {
        this(context, null);
    }

    public CircleGearView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public CircleGearView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        mContext = context;
        initView(attrs);
    }


    private void initView(AttributeSet attrs){
        setLayerType(View.LAYER_TYPE_SOFTWARE, null);  // 关闭硬件加速
        this.setWillNotDraw(false);                    // 调用此方法后，才会执行 onDraw(Canvas) 方法
        mPaint = new Paint();

        //获取自定义属性和默认值
        TypedArray typedArray = mContext.obtainStyledAttributes(attrs, R.styleable.CGViewStyleable);

        mRoundWidth = typedArray.getDimension(R.styleable.CGViewStyleable_round_width, DensityUtils.dp2px(7));
        mMainColor = typedArray.getColor(R.styleable.CGViewStyleable_round_color, getResources().getColor(R.color.green));

        mInnerRoundWidth = typedArray.getDimension(R.styleable.CGViewStyleable_inner_round_width, DensityUtils.dp2px(2));
        mInnerRoundColor = typedArray.getColor(R.styleable.CGViewStyleable_inner_round_color, getResources().getColor(R.color.white33));

        paddingOuterThumb = DensityUtils.dp2px(20);
    }

    @Override
    protected void onSizeChanged(int width, int height, int oldw, int oldh) {
        centerX = width / 2;
        centerY = height / 2;
        int minCenter = Math.min(centerX, centerY);

        radius = (int) (minCenter - mRoundWidth / 2 - paddingOuterThumb); //圆环的半径
        roundRadius = radius - (int)(3 * mRoundWidth);
        minValidateTouchArcRadius = (int) (radius - paddingOuterThumb * 1.5f);
        maxValidateTouchArcRadius = (int) (radius + paddingOuterThumb * 1.5f);
        super.onSizeChanged(width, height, oldw, oldh);
    }

    @Override
    public void onDraw(Canvas canvas) {
      //  setLayerType(LAYER_TYPE_SOFTWARE, null);//对单独的View在运行时阶段禁用硬件加速
        initOnDraw(canvas);
    }

    /** start circle -*/
    private void initOnDraw(Canvas canvas) {
        /** 画刻度-200份- 还分正反切换---start */
        mPaint.setStrokeWidth(DensityUtils.dp2px(1));
        for (int i = 0; i < 200; i++){
            //radius:模糊半径，radius越大越模糊，越小越清晰，但是如果radius设置为0，则阴影消失不见
            //dx:阴影的横向偏移距离，正值向右偏移，负值向左偏移
            //dy:阴影的纵向偏移距离，正值向下偏移，负值向上偏移
            //color: 绘制阴影的画笔颜色，即阴影的颜色（对图片阴影无效）

            if (i < mOuterRoundProgress) {
                if (mOuterSences) {
//                    mPaint.setShadowLayer(30, 0, 0, mMainColor);
                    mPaint.setColor(getResources().getColor(R.color.green));
                } else
                    mPaint.setColor(getResources().getColor(R.color.white33));
            } else {
                if (mOuterSences)
                    mPaint.setColor(getResources().getColor(R.color.white33));
                else {
//                    mPaint.setShadowLayer(30, 0, 0, mMainColor);
                    mPaint.setColor(getResources().getColor(R.color.green));
                }
            }
            float mProgress = (i)* 1.0f/ 200 * max;
            PointF mProgressPoint = ChartUtils.calcArcEndPointXY(centerX, centerY, radius, 360 * mProgress / max, 90);
            //圆上到圆心
            float scale1 = radius * 1.0F / mRoundWidth;
            float scale2 = radius * 1.0F / (radius - mRoundWidth);
            //计算内圆上的点
            float disX = (scale1*mProgressPoint.x + scale2*centerX)/(scale1+ scale2);
            float disY =  (scale1*mProgressPoint.y + scale2*centerY)/(scale1+ scale2);
            //计算外圆上的点
            float disX2 = mProgressPoint.x*2 - disX;
            float disY2 =  mProgressPoint.y*2 - disY;
//            if (mProgress%6 == 0){
//                //直线3/4高度
//                canvas.drawLine(disX2 ,disY2,disX,disY, mPaint);
//            }else{
                //直线1/2高度
                float disX3 = (disX*1 + disX2)/2;
                float disY3 =  (disY*1 + disY2)/2;
                canvas.drawLine(disX3 ,disY3,disX,disY, mPaint);
//            }
        }
        /** 画刻度-200份- 还分正反切换---end */

        // 移动圆点
        mProgressPoint = ChartUtils.calcArcEndPointXY(centerX, centerY, radius - 55, 360 *
                progress / max, (float)90);
//        //直接用画笔画
        mPaint.setColor(getResources().getColor(R.color.green));  //设置进度的颜色
        // 设置渐变
//        Shader shader = new RadialGradient(
//                0, 0, 50, // 圆的中心坐标和半径
//                mMainColor, mInnerRoundColor, // 渐变的起止颜色
//                Shader.TileMode.CLAMP // 渐变模式
//        );
//        mPaint.setShader(shader);
        canvas.drawCircle(mProgressPoint.x, mProgressPoint.y,30 ,mPaint);
        canvas.restore();
        canvas.save();

    }

    @Override
    protected void onDetachedFromWindow() {
        super.onDetachedFromWindow();
    }

    /**
     * 设置进度，此为线程安全控件，由于考虑多线的问题，需要同步
     * 刷新界面调用postInvalidate()能在非UI线程刷新
     *
     * @param progress
     */
    public synchronized void setProgress(float progress) {
        if (progress < 0) {
            mTxtProgress = 1;
            progress = 0;
        }
        mTxtProgress =  Math.round(progress);
        float ss = progress * 200 / 100;
        progress = (int) ss;
        if (progress < 0) {
            throw new IllegalArgumentException("progress not less than 0");
        }
        if (progress > max) {
            progress = max;
            mOuterRoundProgress = progress + 1;
        }
        if (progress <= max) {
            this.progress = progress;
            mOuterRoundProgress = progress + 1;
            postInvalidate();
        }
    }
}

工具类

package com.android.circlescalebar.utils;

import android.graphics.PointF;

public class ChartUtils {

    /**
     * 依圆心坐标，半径，扇形角度，计算出扇形终射线与圆弧交叉点的xy坐标
     *
     * @param cirX     圆centerX
     * @param cirY     圆centerY
     * @param radius   圆半径
     * @param cirAngle 当前弧角度
     * @return 扇形终射线与圆弧交叉点的xy坐标
     */
    public static PointF calcArcEndPointXY(float cirX, float cirY, float radius, float
            cirAngle) {
        float posX = 0.0f;
        float posY = 0.0f;
        //将角度转换为弧度
        float arcAngle = (float) (Math.PI * cirAngle / 180.0);
        if (cirAngle < 90) {
            posX = cirX + (float) (Math.cos(arcAngle)) * radius;
            posY = cirY + (float) (Math.sin(arcAngle)) * radius;
        } else if (cirAngle == 90) {
            posX = cirX;
            posY = cirY + radius;
        } else if (cirAngle > 90 && cirAngle < 180) {
            arcAngle = (float) (Math.PI * (180 - cirAngle) / 180.0);
            posX = cirX - (float) (Math.cos(arcAngle)) * radius;
            posY = cirY + (float) (Math.sin(arcAngle)) * radius;
        } else if (cirAngle == 180) {
            posX = cirX - radius;
            posY = cirY;
        } else if (cirAngle > 180 && cirAngle < 270) {
            arcAngle = (float) (Math.PI * (cirAngle - 180) / 180.0);
            posX = cirX - (float) (Math.cos(arcAngle)) * radius;
            posY = cirY - (float) (Math.sin(arcAngle)) * radius;
        } else if (cirAngle == 270) {
            posX = cirX;
            posY = cirY - radius;
        } else {
            arcAngle = (float) (Math.PI * (360 - cirAngle) / 180.0);
            posX = cirX + (float) (Math.cos(arcAngle)) * radius;
            posY = cirY - (float) (Math.sin(arcAngle)) * radius;
        }
        return new PointF(posX, posY);
    }

    /**
     * 依圆心坐标，半径，扇形角度，计算出扇形终射线与圆弧交叉点的xy坐标
     *
     * @param cirX       圆centerX
     * @param cirY       圆centerY
     * @param radius     圆半径
     * @param cirAngle   当前弧角度
     * @param orginAngle 起点弧角度
     * @return 扇形终射线与圆弧交叉点的xy坐标
     */
    public static PointF calcArcEndPointXY(float cirX, float cirY, float radius, float
            cirAngle, float orginAngle) {
        cirAngle = (orginAngle + cirAngle) % 360;
        return calcArcEndPointXY(cirX, cirY, radius, cirAngle);
    }
}

package com.android.circlescalebar.utils;

import android.content.res.Resources;

public class DensityUtils {
    public float density;

    public DensityUtils() {
        density = Resources.getSystem().getDisplayMetrics().density;
    }

    /**
     * 根据手机的分辨率从 dp 的单位 转成为 px(像素)
     * @param dpValue 虚拟像素
     * @return 像素
     */
    public static int dp2px(float dpValue) {
        return (int) (0.5f + dpValue * Resources.getSystem().getDisplayMetrics().density);
    }

    /**
     * 根据手机的分辨率从 px(像素) 的单位 转成为 dp
     * @param pxValue 像素
     * @return 虚拟像素
     */
    public static float px2dp(int pxValue) {
        return (pxValue / Resources.getSystem().getDisplayMetrics().density);
    }

    /**
     * 根据手机的分辨率从 dp 的单位 转成为 px(像素)
     * @param dpValue 虚拟像素
     * @return 像素
     */
    public int dip2px(float dpValue) {
        return (int) (0.5f + dpValue * density);
    }

    /**
     * 根据手机的分辨率从 px(像素) 的单位 转成为 dp
     * @param pxValue 像素
     * @return 虚拟像素
     */
    public float px2dip(int pxValue) {
        return (pxValue / density);
    }
}

调用实现

    private int count = 0;  
    private Handler handler = new Handler();  
    private Runnable updateTextRunnable;  

    private CircleGearView circleGearView;
  
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_main);  
  
        circleGearView = findViewById(R.id.circleGearView); 
  
        updateTextRunnable = new Runnable() {  
            @Override  
            public void run() {  
                circleGearView.setProgress(count);
                count++;  
                if (count > 100) {  
                    // 停止循环  
                    handler.removeCallbacks(this);  
                } else {  
                    // 继续循环  
                    handler.postDelayed(this, 1000); // 每秒更新一次  
                }  
            }  
        };  
  
        // 开始循环  
        handler.post(updateTextRunnable);  
    }  
  
    @Override  
    protected void onDestroy() {  
        super.onDestroy();  
        // 确保在Activity销毁时移除所有回调和消息，防止内存泄漏  
        handler.removeCallbacks(updateTextRunnable);  
    }

布局

    <com.android.circlescalebar.view.CircleGearView
        android:id="@+id/circleGearView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:inner_round_color="@color/white33"
        app:inner_round_width="2dp"
        app:round_color="@color/green"
        app:round_width="7dp" />

attrs

    <declare-styleable name="CGViewStyleable">
        <!-- 圆的宽度 -->
        <attr name="round_width" format="dimension"/>
        <attr name="round_color" format="color"/>
        <attr name="inner_round_width" format="dimension"/>
        <attr name="inner_round_color" format="color"/>
    </declare-styleable>