Android自定义半圆形圆盘滚动选择器

<!--自定义半圆形展示效果转盘选择器控件--> <declare-styleable name="ringview_half"> <attr name="image_angle_rh" format="integer" /> <attr name="image_padding_rh" format="integer" /> <attr name="max_speed_rh" format="integer" /> <attr name="min_speed_rh" format="integer" /> <attr name="list_rh" format="integer" /> <attr name="can_scroll_rh" format="boolean" /> <attr name="is_right_select_icon_rh" format="boolean" /></declare-styleable>

import android.content.Context;import android.content.res.TypedArray;import android.graphics.Rect;import android.util.AttributeSet;import android.util.Log;import android.view.MotionEvent;import android.view.View;import android.view.ViewGroup;import android.widget.ImageView;import com.wj.R;import com.wj.utils.DensityUtil;import com.wj.utils.ScreenUtils;import java.util.ArrayList;import java.util.List;/** * @time 2018/6/8 * @author JunJieW * @since 1376881525@qq.com * @description 自定义半圆形展示效果转盘选择器控件 */public class RingViewHalf extends ViewGroup { /** * 上一次滑动的坐标 */ private float mLastX; private float mLastY; /** * 检测按下到抬起时使用的时间 */ private long mDownTime; /** * 自动滚动线程 */ private ScrollResetRunnable mScrollResetRunnable; /** * 检测按下到抬起时旋转的角度 */ private float mTmpAngle; /** * 每秒最大移动角度 */ private int mMax_Speed; /** * 如果移动角度达到该值，则屏蔽点击 */ private int mMin_Speed; /** * 圆的直径 */ private int mRadius; /** * 判断是否正在自动滚动 */ private boolean isMove; /** * 布局滚动角度 */ private int mStartAngle = 0; /** * 中间条的宽度 */ private int mCircleLineStrokeWidth; /** * 图片内容偏移角度 */ private int mImageAngle; /** * 是否初始化布局 */ private boolean isChekc = false; /** * 布局view */ private List<Integer> mImageList = new ArrayList<>(); /** * 是否可点击 */ private boolean isCanClick = true; /** * 图片与环之间的padding */ private int mPadding; /** * 是否是右边居中的图标为选中图标 */ private boolean is_right_select_icon = true; /** * 是否是右边居中的图标为选中图标 */ private Rect select_icon_rect = new Rect(); //是否能转动 private boolean mCanScrool; public RingViewHalf(Context context) { this(context, null, 0); } public RingViewHalf(Context context, AttributeSet attrs) { this(context, attrs, 0); } public RingViewHalf(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); //获取自定义控件设置的值 TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.ringview_half, 0, 0); mMax_Speed = array.getInteger(R.styleable.ringview_half_max_speed_rh, 300); mMin_Speed = array.getInteger(R.styleable.ringview_half_min_speed_rh, 3); mImageAngle = array.getInteger(R.styleable.ringview_half_image_angle_rh, 0); mPadding = array.getInteger(R.styleable.ringview_half_image_padding_rh, 0); mCanScrool = array.getBoolean(R.styleable.ringview_half_can_scroll_rh, true); is_right_select_icon = array.getBoolean(R.styleable.ringview_half_is_right_select_icon_rh, true); //获取xml定义的资源文件 TypedArray mList = context.getResources().obtainTypedArray(array.getResourceId(R.styleable.ringview_half_list_rh, 0)); int len = mList.length(); if (len > 0) {  for (int i = 0; i < len; i++)  mImageList.add(mList.getResourceId(i, 0)); } else {  mImageList.add(R.mipmap.icon);  mImageList.add(R.mipmap.icon);  mImageList.add(R.mipmap.icon); } mList.recycle(); array.recycle(); int [] location =new int [2]; getLocationInWindow(location); Log.d("locationInWindow",">>>>X=="+location[0]+"y=="+location[1]); addImgIcon(); } @Override protected void onLayout(boolean changed, int l, int t, int r, int b) { if (!isChekc) {  initView();  mRadius = getWidth();  isChekc = true; } } /** * 测量 */ @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { setMeasuredDimension(widthMeasureSpec, heightMeasureSpec); super.onMeasure(widthMeasureSpec, heightMeasureSpec); int childCount = this.getChildCount(); for (int i = 0; i < childCount; i++) {  View child = this.getChildAt(i);  this.measureChild(child, widthMeasureSpec, heightMeasureSpec);  child.getMeasuredWidth(); } } /** * 排版布局 */ private void initView() { int width = this.getWidth(); int height = this.getHeight(); if (width != height) {  int min = Math.min(width, height);  width = min;  height = min; } //不同屏幕分辨率下做不同的处理 float instPadding = 70f; if (ScreenUtils.getScreenWidth(getContext())<=720){  instPadding = 55f; } //图片摆放的圆弧半径 mCircleLineStrokeWidth = getChildAt(0).getMeasuredHeight() + DensityUtil.dip2px(getContext(),instPadding) + mPadding; //计算图片圆的半径 final int mContent = width / 2 - mCircleLineStrokeWidth / 2; for (int i = 0; i < getChildCount(); i++) {  View child = this.getChildAt(i);  //计算每个图片摆放的角度  int mAnGle = 360 / mImageList.size() * (i + 1) + mImageAngle;  //获取每个图片摆放的左上角的x和y坐标  float left = (float) (width / 2 + mContent * Math.cos(mAnGle * Math.PI / 180)) - child.getMeasuredWidth() / 2;  float top = (float) (height / 2 + mContent * Math.sin(mAnGle * Math.PI / 180)) - child.getMeasuredHeight() / 2;  /**  * 一四象限  */  if (getQuadrantByAngle(mAnGle) == 1 || getQuadrantByAngle(mAnGle) == 4) {//  child.setRotation(mAnGle - 270);  /**   * 二三象限   */  } else {//  child.setRotation(mAnGle + 90);  }  child.layout((int) left, (int) top, (int) left + child.getMeasuredWidth(), (int) top + child.getMeasuredHeight()); } } /** * 添加子控件 */ private void addImgIcon() { for (int i = 1; i < mImageList.size() + 1; i++) {  //新建imageview  final ImageView mImageView = new ImageView(getContext());  mImageView.setImageResource(mImageList.get(i - 1));  LayoutParams layoutParams = null;  mImageView.setScaleType(ImageView.ScaleType.FIT_XY);  if (is_right_select_icon){  //右侧icon为选中状态  if (i==mImageList.size()){   mImageView.setAlpha(1f);   layoutParams = new LayoutParams(DensityUtil.dip2px(getContext(),40f), DensityUtil.dip2px(getContext(),40f));  }else {   mImageView.setAlpha(0.5f);   layoutParams = new LayoutParams(DensityUtil.dip2px(getContext(),40f), DensityUtil.dip2px(getContext(),40f));  }  }else {  // 左侧icon为选中状态  if (i==5){   mImageView.setAlpha(1f);   layoutParams = new LayoutParams(DensityUtil.dip2px(getContext(),40f), DensityUtil.dip2px(getContext(),40f));  }else {   mImageView.setAlpha(0.5f);   layoutParams = new LayoutParams(DensityUtil.dip2px(getContext(),40f), DensityUtil.dip2px(getContext(),40f));  }  }  mImageView.setLayoutParams(layoutParams);  final int finalI = i;  //添加点击事件  mImageView.setOnClickListener(new OnClickListener() {  @Override  public void onClick(View view) {   if (isCanClick) {//   Toast.makeText(getContext(),finalI + " ---", Toast.LENGTH_SHORT).show();   if (mOnLogoItemClick != null)    mOnLogoItemClick.onItemClick(view, finalI - 1);   }  }  });  //添加view  addView(mImageView); } //添加view点击事件 setOnClickListener(new OnClickListener() {  @Override  public void onClick(View view) {  if (isCanClick) {  }  } }); } /** * 触摸监听 */ @Override public boolean dispatchTouchEvent(MotionEvent event) { if (mCanScrool) {  float x = event.getX();  float y = event.getY();  switch (event.getAction()) {  case MotionEvent.ACTION_DOWN:   mLastX = x;   mLastY = y;   mDownTime = System.currentTimeMillis();   mTmpAngle = 0;   // 如果当前已经在快速滚动   if (isMove) {   // 移除快速滚动的回调   removeCallbacks(mScrollResetRunnable);   isMove = false;   return true;   }   break;  case MotionEvent.ACTION_MOVE:   /**   * 获得开始的角度   */   float start = getAngle(mLastX, mLastY);   /**   * 获得当前的角度   */   float end = getAngle(x, y);   Log.e("TAG", "start = " + start + " , end =" + end);   // 一四象限   if (getQuadrant(x, y) == 1 || getQuadrant(x, y) == 4) {   mStartAngle += end - start;   mTmpAngle += end - start;   //二三象限   } else {   mStartAngle += start - end;   mTmpAngle += start - end;   }   // 重新布局   getCheck();   break;  case MotionEvent.ACTION_UP:   // 获取每秒移动的角度   float anglePerSecond = mTmpAngle * 1000    / (System.currentTimeMillis() - mDownTime);   // 如果达到最大速度   if (Math.abs(anglePerSecond) > mMax_Speed && !isMove) {   // 惯性滚动   post(mScrollResetRunnable = new ScrollResetRunnable(anglePerSecond));   return true;   }   // 如果当前旋转角度超过minSpeed屏蔽点击   if (Math.abs(mTmpAngle) > mMin_Speed) {   return true;   }   break;  } } return super.dispatchTouchEvent(event); } /** * 获取移动的角度 */ private float getAngle(float xTouch, float yTouch) { double x = xTouch - (mRadius / 2d); double y = yTouch - (mRadius / 2d); return (float) (Math.asin(y / Math.hypot(x, y)) * 180 / Math.PI); } /** * 根据当前位置计算象限 */ private int getQuadrant(float x, float y) { int tmpX = (int) (x - mRadius / 2); int tmpY = (int) (y - mRadius / 2); if (tmpX >= 0) {  return tmpY >= 0 ? 4 : 1; } else {  return tmpY >= 0 ? 3 : 2; } } /** * 在activity的onCreate方法中获取当前自定义view中在屏幕中的绝对坐标始终为0， * 改成在onWindowFocusChanged函数中获取即可，这时view都已经加载完成 * 但这里特别注意一点要：如果是fragment种使用该自定义view的话，这里的方法就应该注释掉 * 因为不但获取到的矩形的值是空的，而且当你的fragment执行了跳转的逻辑后，再返回后会发 * 一种特别恶心的异常，你获取到判断选中位置的矩形的left，top，right，bottom的值会和 * 初始化的时候不一样，导致你选中时候的状态出现异常情况，本人已经被坑过，希望后面的同学 * 一定注意吸取教训 */ @Override public void onWindowFocusChanged(boolean hasWindowFocus) { super.onWindowFocusChanged(hasWindowFocus); getSelectIconReft(); } //获取选中icon位置的矩形范围 private void getSelectIconReft() { int [] location = new int [2]; getLocationOnScreen(location); //计算出右侧选中时图标的位置 if (is_right_select_icon){  //选中的icon动态设置宽高为60，没选中宽高55，这里60/2为选中按钮的宽度或者高度的一半，即中心点  select_icon_rect.left = location[0]+getWidth()-mCircleLineStrokeWidth/2-DensityUtil.dip2px(getContext(),40f)/2;  select_icon_rect.top =(location[1]+getHeight()/2)-DensityUtil.dip2px(getContext(),40f)/2;  select_icon_rect.right = location[0]+getWidth()-mCircleLineStrokeWidth/2+DensityUtil.dip2px(getContext(),40f)/2;  select_icon_rect.bottom = (location[1]+getHeight()/2)+DensityUtil.dip2px(getContext(),40f)/2; }else {  //计算出左侧选中时图标的位置  //选中的icon动态设置宽高为60，没选中宽高55，这里60/2为选中按钮的宽度或者高度的一半，即中心点  select_icon_rect.left = location[0]+mCircleLineStrokeWidth/2-DensityUtil.dip2px(getContext(),40f)/2;  select_icon_rect.top = (location[1]+getHeight()/2)-DensityUtil.dip2px(getContext(),40f)/2;  select_icon_rect.right = location[0]+mCircleLineStrokeWidth/2+DensityUtil.dip2px(getContext(),40f)/2;  select_icon_rect.bottom = (location[1]+getHeight()/2)+DensityUtil.dip2px(getContext(),40f)/2; } Log.d("onFocusChanged","-----getHeight=="+getChildAt(0).getHeight()+";getWidth=="+getChildAt(0).getWidth()); } /** * 通过角度判断象限 */ private int getQuadrantByAngle(int angle) { if (angle <= 90) {  return 4; } else if (angle <= 180) {  return 3; } else if (angle <= 270) {  return 2; } else {  return 1; } } /** * 惯性滚动 */ private class ScrollResetRunnable implements Runnable { private float angelPerSecond; public ScrollResetRunnable(float velocity) {  this.angelPerSecond = velocity; } public void run() {  //小于20停止  if ((int) Math.abs(angelPerSecond) < 20) {  isMove = false;  return;  }  isMove = true;  // 滚动时候不断修改滚动角度大小//  mStartAngle += (angelPerSecond / 30);  mStartAngle += (angelPerSecond / 40);  //逐渐减小这个值  angelPerSecond /= 1.0666F;  postDelayed(this, 30);  // 重新布局  getCheck(); } } /** * 点击事件接口 */ public interface OnLogoItemClick { void onItemClick(View view, int pos); } private OnLogoItemClick mOnLogoItemClick; private OnIconSelectedListener mOnIconSelectedListener; /** * 设置点击事件 * @param mOnLogoItemClick */ public void addOnItemClick(OnLogoItemClick mOnLogoItemClick) { this.mOnLogoItemClick = mOnLogoItemClick; } /** * 到选中位置后选中事件接口 */ public interface OnIconSelectedListener{ void onIconSelected( int pos); } /** * 设置点击事件 * @param mOnIconSelectedListener */ public void addOnIconSelectedListener(OnIconSelectedListener mOnIconSelectedListener) { this.mOnIconSelectedListener = mOnIconSelectedListener; } /** * 旋转圆盘 */ private void getCheck() { mStartAngle %= 360; setRotation(mStartAngle); //改变选中的icon的状态 setSelectedIcon(); } //改变选中的icon的状态 private void setSelectedIcon() { if (select_icon_rect.left==0&&select_icon_rect.top==0){  //fragment中onWindowFocusChanged会出现计算select_icon_rect.left和select_icon_rect.top等于0的情况，  // 所以做下判断，如果为0则重新调用下计算方法  getSelectIconReft(); } for (int j =0;j<getChildCount();j++){  LayoutParams layoutParams = null;  int [] location = new int [2];  getChildAt(j).getLocationOnScreen(location);  Log.d("getCheck","location[0]=="+location[0]+";select_icon_rect.left=="+select_icon_rect.left+"location[1]=="+location[1]+";select_icon_rect.top=="+select_icon_rect.top);  if (is_right_select_icon){  //右边icon是选中状态的时候  if (select_icon_rect.left-22<=location[0]&&location[0]<=select_icon_rect.right+22){   if (select_icon_rect.top-22<=location[1]&&location[1]<=select_icon_rect.bottom+22){   getChildAt(j).setAlpha(1);   layoutParams = new LayoutParams(DensityUtil.dip2px(getContext(),40f), DensityUtil.dip2px(getContext(),40f));   //把选中的icon所在list中的position通过接口回传过去   if (mOnIconSelectedListener!=null){    mOnIconSelectedListener.onIconSelected(j);   }   }else {   getChildAt(j).setAlpha(0.5f);   layoutParams = new LayoutParams(DensityUtil.dip2px(getContext(),40f), DensityUtil.dip2px(getContext(),40f));   }  }else {   getChildAt(j).setAlpha(0.5f);   layoutParams = new LayoutParams(DensityUtil.dip2px(getContext(),40f), DensityUtil.dip2px(getContext(),40f));  }  }else {  //左边icon是选中状态的时候  if (select_icon_rect.left-22<=location[0]&&location[0]<=select_icon_rect.right+22){   if (select_icon_rect.top-22<=location[1]&&location[1]<=select_icon_rect.bottom+22){   getChildAt(j).setAlpha(1);   layoutParams = new LayoutParams(DensityUtil.dip2px(getContext(),40f), DensityUtil.dip2px(getContext(),40f));   //把选中的icon所在list中的position通过接口回传过去   if (mOnIconSelectedListener!=null){    mOnIconSelectedListener.onIconSelected(j);   }   }else {   getChildAt(j).setAlpha(0.5f);   layoutParams = new LayoutParams(DensityUtil.dip2px(getContext(),40f), DensityUtil.dip2px(getContext(),40f));   }  }else {   getChildAt(j).setAlpha(0.5f);   layoutParams = new LayoutParams(DensityUtil.dip2px(getContext(),40f), DensityUtil.dip2px(getContext(),40f));  }  }  getChildAt(j).setLayoutParams(layoutParams);  getChildAt(j).invalidate();  Log.d("getChildCount","=="+j+";class=="+getChildAt(j).getClass()+";left=="+getChildAt(j).getLeft()+";top=="+getChildAt(j).getTop()+";right=="+getChildAt(j).getRight()+";bottom=="+getChildAt(j).getBottom()+";getLocationOnScreen:x="+location[0]+"y="+location[1]+";getRotationX=="+getRotationX()+";getRotationY=="+getRotationY()); } }}

view.ringView_half_left.addOnIconSelectedListener { position ->  // ToDo 根据postion从你的list中获取对应的选中的对象的bean类属性即可 }

<RelativeLayout  android:layout_width="match_parent"  android:layout_height="match_parent">  <RelativeLayout  android:id="@+id/ring_left_outside_rl"  android:layout_width="@dimen/dp_350"  android:layout_height="@dimen/dp_350"  android:layout_alignParentLeft="true"  android:layout_marginLeft="-240dp">  <com.wj.views.RingViewHalf   android:id="@+id/ringView_half_left"   android:layout_width="match_parent"   android:layout_height="match_parent"   android:background="@drawable/bg_compatibility"   app:image_angle_rh="15"   app:image_padding_rh="20"   app:is_right_select_icon_rh="true"   app:list_rh="@array/zodiac_list" />  <ImageView   android:layout_width="70dp"   android:layout_height="70dp"   android:layout_alignParentLeft="true"   android:layout_centerVertical="true"   android:layout_marginLeft="@dimen/dp_220"   android:src="@drawable/icon_match_boy" />  </RelativeLayout>  <RelativeLayout  android:id="@+id/ring_right_outside_rl"  android:layout_width="@dimen/dp_350"  android:layout_height="@dimen/dp_350"  android:layout_alignParentRight="true"  android:layout_marginRight="-240dp">  <com.wj.views.RingViewHalf   android:id="@+id/ringView_half_right"   android:layout_width="match_parent"   android:layout_height="match_parent"   android:layout_alignParentRight="true"   android:layout_centerVertical="true"   android:background="@drawable/bg_compatibility"   app:image_angle_rh="15"   app:image_padding_rh="20"   app:is_right_select_icon_rh="false"   app:list_rh="@array/zodiac_list" />  <ImageView   android:layout_width="70dp"   android:layout_height="70dp"   android:layout_alignParentRight="true"   android:layout_centerVertical="true"   android:layout_marginRight="@dimen/dp_220"   android:src="@drawable/icon_match_girl" />  </RelativeLayout>  <Button  android:id="@+id/check_btn"  android:layout_width="@dimen/dp_265"  android:layout_height="@dimen/dp_46"  android:layout_alignParentBottom="true"  android:layout_marginBottom="@dimen/dp_25"  android:layout_marginTop="@dimen/dp_25"  android:layout_centerHorizontal="true"  android:alpha="0.5"  android:enabled="true"  android:clickable="true"  android:background="@drawable/check" /></RelativeLayout> 

app:list_rh="@array/zodiac_list" 

<?xml version="1.0" encoding="utf-8"?><resources> <string-array name="zodiac_list"> <item>@drawable/zodiac_1</item> <item>@drawable/zodiac_2</item> <item>@drawable/zodiac_3</item> <item>@drawable/zodiac_4</item> <item>@drawable/zodiac_5</item> <item>@drawable/zodiac_6</item> <item>@drawable/zodiac_7</item> <item>@drawable/zodiac_8</item> <item>@drawable/zodiac_9</item> <item>@drawable/zodiac_10</item> <item>@drawable/zodiac_11</item> <item>@drawable/zodiac_12</item> </string-array></resources>