public class Ring_Slide2 extends View { private static final double RADIAN = 180 / Math.PI; private int max_progress; // 設置最大進度 private int cur_progress; //設置錨點1當前進度 private int cur_progress2; //設置錨點2進度 private int bottom_color;//設置底色 private int circle_color; //設置圓的顏色（錨點） private int slide_color; //設置滑動過的顏色 private float ring_width; //圓環的寬度 private double cur_Angle; //當前錨點1旋轉角度 private double cur_Angle2; //當前錨點2的旋轉角度 private float ring_Radius;//圓環的半徑 private final int[] arrColorCircle = new int[]{0xFFFFde37, 0xFFFFa400}; private int main_width; //圓的寬度 private float mWheelCurX, mWheelCurY; //圓的位置 private float mWheelCurX2, mWheelCurY2; //圓2的位置 private Paint circle_Paint; //圓環的畫筆 private Paint select_Paint;//選中的畫筆 private Paint dot1; //圓點1 private Paint dot2; //圓點2 private Context context; private OnSeekBarChangeListener changeListener,changeListener2; public Ring_Slide2(Context context) {  this(context,null); } public Ring_Slide2(Context context, AttributeSet attrs) {  this(context, attrs,0); } public Ring_Slide2(Context context, AttributeSet attrs, int defStyleAttr) {  super(context, attrs, defStyleAttr);  this.context=context;  initAttrs(attrs,defStyleAttr);  initPadding();  //初始化畫筆  initPaints(); } //初始化屬性 private void initAttrs(AttributeSet attrs, int defStyle){  TypedArray typedArray = getContext().obtainStyledAttributes(attrs, R.styleable.Cricle_slide, defStyle, 0);  max_progress=typedArray.getInt(R.styleable.Cricle_slide_max_progress,720);  cur_progress=typedArray.getInt(R.styleable.Cricle_slide_cur_progress,420);  cur_progress2=typedArray.getInt(R.styleable.Cricle_slide_cur_progress2,540);  if (cur_progress > max_progress) cur_progress = max_progress;  if (cur_progress2 > max_progress) cur_progress2 = max_progress;  Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(), R.mipmap.select_sun_bg2);  main_width= bitmap.getWidth();  ring_width=typedArray.getFloat(R.styleable.Cricle_slide_Ring_Width,main_width);  bottom_color=typedArray.getColor(R.styleable.Cricle_slide_bottom_color,getColor(R.color.select_main_bg_color));  circle_color=typedArray.getColor(R.styleable.Cricle_slide_circle_color,getColor(R.color.duration));  slide_color=typedArray.getColor(R.styleable.Cricle_slide_slide_color,getColor(R.color.time));  typedArray.recycle(); } //初始化邊距 private void initPadding(){  int paddingLeft = getPaddingLeft();  int paddingTop = getPaddingTop();  int paddingRight = getPaddingRight();  int paddingBottom = getPaddingBottom();  int paddingStart = 0, paddingEnd = 0;  if (Build.VERSION.SDK_INT >= 17) {   paddingStart = getPaddingStart();   paddingEnd = getPaddingEnd();  }  int maxPadding = Math.max(paddingLeft, Math.max(paddingTop,    Math.max(paddingRight, Math.max(paddingBottom, Math.max(paddingStart, paddingEnd)))));  setPadding(maxPadding, maxPadding, maxPadding, maxPadding); } private void initPaints(){  /*  圓環的畫筆   */  circle_Paint=new Paint(Paint.ANTI_ALIAS_FLAG);  circle_Paint.setAntiAlias(true);  circle_Paint.setColor(bottom_color);  circle_Paint.setStyle(Paint.Style.STROKE);  circle_Paint.setStrokeWidth(ring_width);  /*  選中區域的畫筆   */  select_Paint=new Paint(Paint.ANTI_ALIAS_FLAG);  select_Paint.setShader(new SweepGradient(0, 0, arrColorCircle, null));  /*select_Paint.setColor(circle_color);*/  select_Paint.setAntiAlias(true);  select_Paint.setStyle(Paint.Style.STROKE);  select_Paint.setStrokeWidth(ring_width);  // 畫錨點  dot1 = new Paint(Paint.ANTI_ALIAS_FLAG);  dot1.setColor(circle_color);  dot1.setAntiAlias(true);  dot1.setStyle(Paint.Style.FILL);  // 畫錨點2  dot2 = new Paint(Paint.ANTI_ALIAS_FLAG);  dot2.setColor(slide_color);  dot2.setAntiAlias(true);  dot2.setStyle(Paint.Style.FILL); } //獲取寬度 private float getDimen(int dimenId) {  return getResources().getDimension(dimenId); } //獲取顏色 @TargetApi(Build.VERSION_CODES.M) private int getColor(int colorId) {  final int version = Build.VERSION.SDK_INT;  if (version >= 23) {   return getContext().getColor(colorId);  } else {   return ContextCompat.getColor(getContext(), colorId);  } } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {  super.onMeasure(widthMeasureSpec, heightMeasureSpec);  Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(), R.mipmap.setalarm_colock_bg);  int height = bitmap.getHeight()+main_width*2;  int width = bitmap.getWidth()+main_width*2;  int min = Math.min(height, width);  setMeasuredDimension(min,min);  initposition(); } private void initposition(){  //轉換為360度  cur_Angle=(double) cur_progress / max_progress*360.0;  cur_Angle2=(double)cur_progress2 / max_progress*360.0;  //計算初始化旋轉的角度  double cos = -Math.cos(Math.toRadians(cur_Angle));  double cos2 = -Math.cos(Math.toRadians(cur_Angle2));  //根據旋轉的角度來確定位置  MakeCurPosition(cos);  MakeCurPosition2(cos2);  //確定圓環的半徑  ring_Radius=(getMeasuredWidth() - getPaddingLeft() - getPaddingRight() - ring_width) / 2; } private void MakeCurPosition(double cos){  //根據旋轉的角度來確定圓的位置  //確定x點的坐標  mWheelCurX = calcXLocationInWheel(cur_Angle, cos);  //確定y點的坐標  mWheelCurY=calcYLocationInWheel(cos); } private void MakeCurPosition2(double cos2){  //根據旋轉的角度來確定圓的位置  //確定x點的坐標  mWheelCurX2 = calcXLocationInWheel(cur_Angle2, cos2);  //確定y點的坐標  mWheelCurY2=calcYLocationInWheel(cos2); } //確定x點的坐標 private float calcXLocationInWheel(double angle,double cos){  if (angle < 180) {   return (float) (getMeasuredWidth() / 2 + Math.sqrt(1 - cos * cos) * ring_Radius); //Math.sqrt正平分根 9-3  } else {   return (float) (getMeasuredWidth() / 2 - Math.sqrt(1 - cos * cos) * ring_Radius);  } } //確定y點的坐標 private float calcYLocationInWheel(double cos) {  return getMeasuredWidth() / 2 + ring_Radius * (float) cos; } @Override protected void onDraw(Canvas canvas) {  super.onDraw(canvas);  float left = getPaddingLeft() + ring_width / 2;  float top = getPaddingTop() + ring_width / 2;  float right = canvas.getWidth() - getPaddingRight() - ring_width / 2;  float bottom = canvas.getHeight() - getPaddingBottom() - ring_width / 2;  float centerX = (left + right) / 2;  float centerY = (top + bottom) / 2;  float wheelRadius = (canvas.getWidth() - getPaddingLeft() - getPaddingRight()) / 2 - ring_width / 2;  canvas.drawCircle(centerX, centerY, wheelRadius, circle_Paint);  //畫選中區域  // canvas.drawArc(new RectF(left, top, right, bottom), (float) (Math.PI * RADIAN + Math.acos(cur_Angle) * RADIAN), (float) (Math.abs(cur_Angle-cur_Angle2)), false, select_Paint);  Log.i("TAG","第一個的角度="+cur_Angle);  Log.i("TAG","第一個的角度2="+cur_Angle2);  float begin=0; //圓弧的起點位置  float stop=0;  if(cur_Angle>180 && cur_Angle>cur_Angle2 ){ //180 -- 360   begin=(float) (-Math.abs(cur_Angle-360)-90);   stop=(float) Math.abs(Math.abs(cur_Angle-360)+cur_Angle2);   Log.i("TAG","begin="+begin);   Log.i("TAG","stop="+stop);  }else if(cur_Angle>cur_Angle2){   begin=(float) cur_Angle-90;   stop=(float)(360-(cur_Angle-cur_Angle2));  }else {    begin=(float) cur_Angle-90;   stop=(float) Math.abs(cur_Angle-cur_Angle2);  }  canvas.drawArc(new RectF(left, top, right, bottom), begin,stop, false, select_Paint);  //畫錨點 畫圓  canvas.drawCircle(mWheelCurX, mWheelCurY, ring_width/2, dot1);  //畫錨點 畫圓  canvas.drawCircle(mWheelCurX2, mWheelCurY2, ring_width/2, dot2);  Log.i("TAG","錨點1Y"+mWheelCurY+"錨點1X"+mWheelCurX);  Log.i("TAG","錨點2Y"+mWheelCurY2+"錨點1X"+mWheelCurX2); } @Override public boolean onTouchEvent(MotionEvent event) {  float x = event.getX();  float y = event.getY();  int flag=0;  //判斷是否觸控到兩個點中的其中某個點  if(isMovedot2(x,y)){   flag=2;  }else if(isMovedot1(x,y)){   flag=1;  }  /* if(isMovedot1(x,y)){   flag=1;  }else if(isMovedot2(x,y)){   flag=2;  }*/  if(event.getAction()==MotionEvent.ACTION_MOVE || isMovedot1(x,y) ==true || isMovedot2(x,y)==true ){   Log.i("TAG","進入X="+x+"進入Y="+y);   //通過觸摸點算出cos角度值   float cos = calculateCos(x, y);   // 通過反三角函數獲得角度值   double angle; //獲取滑動的角度   if (x < getWidth() / 2) { // 滑動超過180度    angle = Math.PI * RADIAN + Math.acos(cos) * RADIAN; //通過計算得到滑動的角度值   } else { // 沒有超過180度    angle = Math.PI * RADIAN - Math.acos(cos) * RADIAN; //PI 周長比直徑 返回弧角度的余弦值   }   if(flag==1){    cur_Angle=angle;    cur_progress=getSelectedValue(cur_Angle);    MakeCurPosition(cos);    if (changeListener != null) {     changeListener.onChanged(this, cur_progress);    }   }else if(flag==2){    cur_Angle2=angle;    cur_progress2=getSelectedValue(cur_Angle2);    MakeCurPosition2(cos);    if (changeListener2 != null) {     changeListener2.onChanged(this, cur_progress2);    }   }   invalidate();   return true;  }else {   return super.onTouchEvent(event);  } } private boolean isMovedot1(float x,float y){  float dot1x = Math.abs(mWheelCurX - x);  float dot1y = Math.abs(mWheelCurY - y);  if(dot1x<30 && dot1y<30){   return true;  }else{   return false;  } } private boolean isMovedot2(float x,float y){  float dot1x = Math.abs(mWheelCurX2 - x);  float dot1y = Math.abs(mWheelCurY2 - y);  if(dot1x<30 && dot1y<30){   return true;  }else{   return false;  } } //拿到切斜角的cos值 private float calculateCos(float x, float y){  float width = x - getWidth() / 2;  float height = y - getHeight() / 2;  float slope = (float) Math.sqrt(width * width + height * height);  return height / slope; } private int getSelectedValue(double mCurAngle) { //角度轉進度  return Math.round(max_progress * ((float) mCurAngle / 360)); //四舍五入 } public void setOnSeekBarChangeListener(OnSeekBarChangeListener listener) {  changeListener = listener; } public void setOnSeekBarChangeListener2(OnSeekBarChangeListener listener) {  changeListener2 = listener; } public void initRadian(int pro1,int pro2){  this.cur_progress=pro1;  this.cur_progress2=pro2;  invalidate(); } public interface OnSeekBarChangeListener {  void onChanged(Ring_Slide2 seekbar, int curValue); }}

 <declare-styleable name="Cricle_slide">  //設置最大進度  <attr name="max_progress" format="integer"></attr>  //設置當前進度  <attr name="cur_progress" format="integer"></attr>  //設置當前進度  <attr name="cur_progress2" format="integer"></attr>  //設置底色  <attr name="bottom_color" format="color"></attr>  //設置圓的顏色  <attr name="circle_color" format="color"></attr>  //設置滑動的顏色  <attr name="slide_color" format="color"></attr>  //圓環的寬度 （dimension是代表尺寸值）  <attr name="Ring_Width" format="dimension"></attr> </declare-styleable>