Android 圆环带刻度条进度动画效果实现-编程知识

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);}@Overrideprotected 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);}@Overridepublic 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));} elsemPaint.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();}@Overrideprotected 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, floatcirAngle) {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, floatcirAngle, 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.CircleGearViewandroid: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>