Android自定义半圆形圆盘滚动选择器

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 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 >>>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 

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

 }

app:list_rh="@array/zodiac_list" 

<&＃63;xml version="1.0" encoding="utf-8"&＃63;>


 
 @drawable/zodiac_1
 @drawable/zodiac_2
 @drawable/zodiac_3
 @drawable/zodiac_4
 @drawable/zodiac_5
 @drawable/zodiac_6
 @drawable/zodiac_7
 @drawable/zodiac_8
 @drawable/zodiac_9
 @drawable/zodiac_10
 @drawable/zodiac_11
 @drawable/zodiac_12