Android实现高仿QQ附近的人搜索展示

本文主要实现了高仿QQ附近的人搜索展示，用到了自定义控件的方法

最终效果如下

1.下面展示列表我们可以使用ViewPager来实现（当然如果你不觉得麻烦，你也可以用HorizontalScrollView来试试）

2.上面的扫描图，肯定是个ViewGroup(因为里面的小圆点是可以点击的，如果是View的话，对于这些小圆点的位置的判断，以及对小圆点缩放动画的处理都会超级麻烦，难以实现)，所以我们肯定需要自定义ViewGroup

3.确定好了是自定义ViewGroup后，对于里面需要放什么对象呢？没错，就是N个小圆点+一个扫描的大圈圈。

下面的viewPager实现

自定义CustomViewPager

package com.zj.custom;import android.content.Context;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.view.MotionEvent;/*** com.zj.custom.CustomViewPager* Created by jjx on 2016/5/12.*/
public class CustomViewPager extends ViewPager{private long downTime;private float LastX;private float mSpeed;public CustomViewPager(Context context) {super(context);}public CustomViewPager(Context context, AttributeSet attrs) {super(context, attrs);}@Overridepublic boolean dispatchTouchEvent(MotionEvent ev) {float x = ev.getX();switch (ev.getAction()) {case MotionEvent.ACTION_DOWN:downTime = System.currentTimeMillis();LastX = x;break;case MotionEvent.ACTION_MOVE:x = ev.getX();break;case MotionEvent.ACTION_UP://计算得到手指从按下到离开的滑动速度mSpeed = (x - LastX) * 1000 / (System.currentTimeMillis() - downTime);break;}return super.dispatchTouchEvent(ev);}public float getSpeed() {return mSpeed;}public void setSpeed(float mSpeed) {this.mSpeed = mSpeed;}
}

MainActivity实现

package com.zj.modelqq;import android.os.Bundle;
import android.os.Handler;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.util.SparseArray;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.AccelerateInterpolator;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;import com.zj.bean.Info;
import com.zj.custom.CustomViewPager;
import com.zj.custom.RadarViewGroup;
import com.zj.util.FixedSpeedScroller;
import com.zj.util.LogUtil;
import com.zj.util.ZoomOutPageTransformer;import java.lang.reflect.Field;public class MainActivity extends AppCompatActivity implements ViewPager.OnPageChangeListener, RadarViewGroup.IRadarClickListener {private CustomViewPager viewPager;private RelativeLayout ryContainer;private RadarViewGroup radarViewGroup;private int[] mImgs = {R.drawable.len, R.drawable.leo, R.drawable.lep,R.drawable.leq, R.drawable.ler, R.drawable.les, R.drawable.mln, R.drawable.mmz, R.drawable.mna,R.drawable.mnj, R.drawable.leo, R.drawable.leq, R.drawable.les, R.drawable.lep};private String[] mNames = {"ImmortalZ", "唐马儒", "王尼玛", "张全蛋", "蛋花", "王大锤", "叫兽", "哆啦A梦"};private int mPosition;private FixedSpeedScroller scroller;private SparseArray<Info> mDatas = new SparseArray<>();@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);initView();initData();/*** 将Viewpager所在容器的事件分发交给ViewPager*/ryContainer.setOnTouchListener(new View.OnTouchListener() {@Overridepublic boolean onTouch(View v, MotionEvent event) {return viewPager.dispatchTouchEvent(event);}});ViewpagerAdapter mAdapter = new ViewpagerAdapter();viewPager.setAdapter(mAdapter);//设置缓存数为展示的数目viewPager.setOffscreenPageLimit(mImgs.length);viewPager.setPageMargin(getResources().getDimensionPixelOffset(R.dimen.viewpager_margin));//设置切换动画viewPager.setPageTransformer(true, new ZoomOutPageTransformer());viewPager.addOnPageChangeListener(this);setViewPagerSpeed(250);new Handler().postDelayed(new Runnable() {@Overridepublic void run() {radarViewGroup.setDatas(mDatas);}}, 1500);radarViewGroup.setiRadarClickListener(this);}private void initData() {for (int i = 0; i < mImgs.length; i++) {Info info = new Info();info.setPortraitId(mImgs[i]);info.setAge(((int) Math.random() * 25 + 16) + "岁");info.setName(mNames[(int) (Math.random() * mNames.length)]);info.setSex(i % 3 == 0 ? false : true);info.setDistance(Math.round((Math.random() * 10) * 100) / 100);mDatas.put(i, info);}}private void initView() {viewPager = (CustomViewPager) findViewById(R.id.vp);radarViewGroup = (RadarViewGroup) findViewById(R.id.radar);ryContainer = (RelativeLayout) findViewById(R.id.ry_container);}/*** 设置ViewPager切换速度* 使用了反射机制* @param duration*/private void setViewPagerSpeed(int duration) {try {Field field = ViewPager.class.getDeclaredField("mScroller");field.setAccessible(true);scroller = new FixedSpeedScroller(MainActivity.this, new AccelerateInterpolator());field.set(viewPager, scroller);scroller.setmDuration(duration);} catch (NoSuchFieldException e) {e.printStackTrace();} catch (IllegalAccessException e) {e.printStackTrace();}}@Overridepublic void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {mPosition = position;}@Overridepublic void onPageSelected(int position) {//radarViewGroup.setCurrentShowItem(position);LogUtil.m("当前位置 " + mPosition);LogUtil.m("速度 " + viewPager.getSpeed());//当手指左滑速度大于2000时viewpager右滑（注意是item+2）if (viewPager.getSpeed() < -1800) {viewPager.setCurrentItem(mPosition + 2);LogUtil.m("位置 " + mPosition);viewPager.setSpeed(0);} else if (viewPager.getSpeed() > 1800 && mPosition > 0) {//当手指右滑速度大于2000时viewpager左滑（注意item-1即可）viewPager.setCurrentItem(mPosition - 1);LogUtil.m("位置 " + mPosition);viewPager.setSpeed(0);}}@Overridepublic void onPageScrollStateChanged(int state) {}@Overridepublic void onRadarItemClick(int position) {viewPager.setCurrentItem(position);}class ViewpagerAdapter extends PagerAdapter {@Overridepublic Object instantiateItem(ViewGroup container, final int position) {final Info info = mDatas.get(position);//设置一大堆演示用的数据，麻里麻烦~~View view = LayoutInflater.from(MainActivity.this).inflate(R.layout.viewpager_layout, null);ImageView ivPortrait = (ImageView) view.findViewById(R.id.iv);ImageView ivSex = (ImageView) view.findViewById(R.id.iv_sex);TextView tvName = (TextView) view.findViewById(R.id.tv_name);TextView tvDistance = (TextView) view.findViewById(R.id.tv_distance);tvName.setText(info.getName());tvDistance.setText(info.getDistance() + "km");ivPortrait.setImageResource(info.getPortraitId());if (info.getSex()) {ivSex.setImageResource(R.drawable.girl);} else {ivSex.setImageResource(R.drawable.boy);}ivPortrait.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {Toast.makeText(MainActivity.this, "这是 " + info.getName() + " >.<", Toast.LENGTH_SHORT).show();}});container.addView(view);return view;}@Overridepublic int getCount() {return mImgs.length;}@Overridepublic boolean isViewFromObject(View view, Object object) {return view == object;}@Overridepublic void destroyItem(ViewGroup container, int position, Object object) {View view = (View) object;container.removeView(view);}}
}

界面配置文件

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"android:background="@drawable/lkd"android:paddingLeft="5dp"android:paddingRight="5dp"tools:context="com.zj.modelqq.MainActivity"><com.zj.custom.RadarViewGroup
        android:id="@+id/radar"android:layout_width="280dp"android:layout_height="280dp"android:layout_centerHorizontal="true"android:layout_marginTop="50dp"><com.zj.custom.RadarView
            android:id="@+id/id_scan_circle"android:layout_width="280dp"android:layout_height="280dp"/></com.zj.custom.RadarViewGroup><RelativeLayout
        android:id="@+id/ry_container"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_alignParentBottom="true"android:layout_marginBottom="25dp"android:clipChildren="false"><com.zj.custom.CustomViewPager
            android:id="@+id/vp"android:layout_width="130dp"android:layout_height="160dp"android:layout_centerInParent="true"android:layout_marginLeft="120dp"android:layout_marginRight="120dp"/></RelativeLayout>
</RelativeLayout>

注意如果我们想要让ViewPager一次显示多个，需要设置其所在父容器 Android:clipChildren=”false”
意思就是不限制子View在其范围内。
细心的你可能会发现MainAcitivity中有
viewPager.setPageTransformer(true, new ZoomOutPageTransformer());
这个，没错，这个就是用来控制我们的切换动画（我在谷歌官方提供的这个基础上进行了修改，也是很好理解）

package com.zj.util;import android.support.v4.view.ViewPager;
import android.view.View;/*** Created by jjx on 2016/5/12.*/
public class ZoomOutPageTransformer implements ViewPager.PageTransformer{private static final float MIN_SCALE = 0.70f;private static final float MIN_ALPHA = 0.5f;@Overridepublic void transformPage(View view, float position) {int pageWidth = view.getWidth();int pageHeight = view.getHeight();if (position < -1) { // [-Infinity,-1)// This page is way off-screen to the left.view.setAlpha(MIN_ALPHA);view.setScaleX(MIN_SCALE);view.setScaleY(MIN_SCALE);} else if (position <= 1) { // [-1,1]// Modify the default slide transition to shrink the page as wellfloat scaleFactor = Math.max(MIN_SCALE, 1 - Math.abs(position));float vertMargin = pageHeight * (1 - scaleFactor) / 2;float horzMargin = pageWidth * (1 - scaleFactor) / 2;if (position < 0) {view.setTranslationX(horzMargin - vertMargin / 2);view.setScaleX(1 + 0.3f * position);view.setScaleY(1 + 0.3f * position);} else {view.setTranslationX(-horzMargin + vertMargin / 2);view.setScaleX(1 - 0.3f * position);view.setScaleY(1 - 0.3f * position);}// Scale the page down (between MIN_SCALE and 1)// Fade the page relative to its size.view.setAlpha(MIN_ALPHA + (scaleFactor - MIN_SCALE) / (1 - MIN_SCALE) * (1 - MIN_ALPHA));} else { // (1,+Infinity]// This page is way off-screen to the right.view.setScaleX(MIN_SCALE);view.setScaleY(MIN_SCALE);view.setAlpha(MIN_ALPHA);}}
}

viewpager效果如下

实现雷达扫描图

代码中也注释得很清楚了，当然因为要扫描，我们需要不停的转动，所以这里我们用到了矩阵变换Matrix，扫描消息的停顿和传递我们用到了Runnable
，如果要是觉得在向主线程一直投递变换的消息对主线程不好，你可以考虑下用SurfaceView来实现

RadarView

package com.zj.custom;import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.Shader;
import android.graphics.SweepGradient;
import android.util.AttributeSet;
import android.view.View;import com.zj.modelqq.R;/*** Created by jjx on 2016/5/12.*/
public class RadarView extends View{private Paint mPaintLine;//画圆线需要用到的paintprivate Paint mPaintCircle;//画圆需要用到的paintprivate Paint mPaintScan;//画扫描需要用到的paintprivate int mWidth, mHeight;//整个图形的长度和宽度private Matrix matrix = new Matrix();//旋转需要的矩阵private int scanAngle;//扫描旋转的角度private Shader scanShader;//扫描渲染shaderprivate Bitmap centerBitmap;//最中间icon//每个圆圈所占的比例private static float[] circleProportion = {1 / 13f, 2 / 13f, 3 / 13f, 4 / 13f, 5 / 13f, 6 / 13f};private int scanSpeed = 5;private int currentScanningCount;//当前扫描的次数private int currentScanningItem;//当前扫描显示的itemprivate int maxScanItemCount;//最大扫描次数private boolean startScan = false;//只有设置了数据后才会开始扫描private IScanningListener iScanningListener;//扫描时监听回调接口public void setScanningListener(IScanningListener iScanningListener) {this.iScanningListener = iScanningListener;}private Runnable run = new Runnable() {@Overridepublic void run() {scanAngle = (scanAngle + scanSpeed) % 360;matrix.postRotate(scanSpeed, mWidth / 2, mHeight / 2);invalidate();postDelayed(run, 130);//开始扫描显示标志为true 且 只扫描一圈if (startScan && currentScanningCount <= (360 / scanSpeed)) {if (iScanningListener != null && currentScanningCount % scanSpeed == 0&& currentScanningItem < maxScanItemCount) {iScanningListener.onScanning(currentScanningItem, scanAngle);currentScanningItem++;} else if (iScanningListener != null && currentScanningItem == maxScanItemCount) {iScanningListener.onScanSuccess();}currentScanningCount++;}}};public RadarView(Context context) {this(context, null);}public RadarView(Context context, AttributeSet attrs) {this(context, attrs, 0);}public RadarView(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);init();post(run);}private void init() {mPaintLine = new Paint();mPaintLine.setColor(getResources().getColor(R.color.line_color_blue));mPaintLine.setAntiAlias(true);mPaintLine.setStrokeWidth(1);mPaintLine.setStyle(Paint.Style.STROKE);mPaintCircle = new Paint();mPaintCircle.setColor(Color.WHITE);mPaintCircle.setAntiAlias(true);mPaintScan = new Paint();mPaintScan.setStyle(Paint.Style.FILL_AND_STROKE);}@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {setMeasuredDimension(measureSize(widthMeasureSpec), measureSize(widthMeasureSpec));mWidth = getMeasuredWidth();mHeight = getMeasuredHeight();mWidth = mHeight = Math.min(mWidth, mHeight);centerBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.circle_photo);//设置扫描渲染的shaderscanShader = new SweepGradient(mWidth / 2, mHeight / 2,new int[]{Color.TRANSPARENT, Color.parseColor("#84B5CA")}, null);}private int measureSize(int measureSpec) {int result = 0;int specMode = MeasureSpec.getMode(measureSpec);int specSize = MeasureSpec.getSize(measureSpec);if (specMode == MeasureSpec.EXACTLY) {result = specSize;} else {result = 300;if (specMode == MeasureSpec.AT_MOST) {result = Math.min(result, specSize);}}return result;}@Overrideprotected void onDraw(Canvas canvas) {drawCircle(canvas);drawScan(canvas);drawCenterIcon(canvas);}/*** 绘制圆线圈** @param canvas*/private void drawCircle(Canvas canvas) {canvas.drawCircle(mWidth / 2, mHeight / 2, mWidth * circleProportion[1], mPaintLine);     // 绘制小圆canvas.drawCircle(mWidth / 2, mHeight / 2, mWidth * circleProportion[2], mPaintLine);   // 绘制中圆canvas.drawCircle(mWidth / 2, mHeight / 2, mWidth * circleProportion[3], mPaintLine); // 绘制中大圆canvas.drawCircle(mWidth / 2, mHeight / 2, mWidth * circleProportion[4], mPaintLine);  // 绘制大圆canvas.drawCircle(mWidth / 2, mHeight / 2, mWidth * circleProportion[5], mPaintLine);  // 绘制大大圆}/*** 绘制扫描** @param canvas*/private void drawScan(Canvas canvas) {canvas.save();mPaintScan.setShader(scanShader);canvas.concat(matrix);canvas.drawCircle(mWidth / 2, mHeight / 2, mWidth * circleProportion[4], mPaintScan);canvas.restore();}/*** 绘制最中间的图标** @param canvas*/private void drawCenterIcon(Canvas canvas) {canvas.drawBitmap(centerBitmap, null,new Rect((int) (mWidth / 2 - mWidth * circleProportion[0]), (int) (mHeight / 2 - mWidth * circleProportion[0]),(int) (mWidth / 2 + mWidth * circleProportion[0]), (int) (mHeight / 2 + mWidth * circleProportion[0])), mPaintCircle);}public interface IScanningListener {//正在扫描（此时还没有扫描完毕）时回调void onScanning(int position, float scanAngle);//扫描成功时回调void onScanSuccess();}public void setMaxScanItemCount(int maxScanItemCount) {this.maxScanItemCount = maxScanItemCount;}/*** 开始扫描*/public void startScan() {this.startScan = true;}
}

小圆点CircleView

package com.zj.custom;import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.View;import com.zj.modelqq.R;
import com.zj.util.DisplayUtils;/*** Created by jjx on 2016/5/12.*/
public class CircleView extends View{private Paint mPaint;private Bitmap mBitmap;private float radius = DisplayUtils.dp2px(getContext(), 9);//半径private float disX;//位置Xprivate float disY;//位置Yprivate float angle;//旋转的角度private float proportion;//根据远近距离的不同计算得到的应该占的半径比例public float getProportion() {return proportion;}public void setProportion(float proportion) {this.proportion = proportion;}public float getAngle() {return angle;}public void setAngle(float angle) {this.angle = angle;}public float getDisX() {return disX;}public void setDisX(float disX) {this.disX = disX;}public float getDisY() {return disY;}public void setDisY(float disY) {this.disY = disY;}public CircleView(Context context) {this(context, null);}public CircleView(Context context, AttributeSet attrs) {this(context, attrs, 0);}public CircleView(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);init();}private void init() {mPaint = new Paint();mPaint.setColor(getResources().getColor(R.color.bg_color_pink));mPaint.setAntiAlias(true);}@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {super.onMeasure(widthMeasureSpec, heightMeasureSpec);setMeasuredDimension(measureSize(widthMeasureSpec), measureSize(heightMeasureSpec));}private int measureSize(int measureSpec) {int result = 0;int specMode = MeasureSpec.getMode(measureSpec);int specSize = MeasureSpec.getSize(measureSpec);if (specMode == MeasureSpec.EXACTLY) {result = specSize;} else {result = DisplayUtils.dp2px(getContext(),18);if (specMode == MeasureSpec.AT_MOST) {result = Math.min(result, specSize);}}return result;}@Overrideprotected void onDraw(Canvas canvas) {canvas.drawCircle(radius, radius, radius, mPaint);if (mBitmap != null) {canvas.drawBitmap(mBitmap, null, new Rect(0, 0, 2 * (int) radius, 2 * (int) radius), mPaint);}}public void setPaintColor(int resId) {mPaint.setColor(resId);invalidate();}public void setPortraitIcon(int resId) {mBitmap = BitmapFactory.decodeResource(getResources(), resId);invalidate();}public void clearPortaitIcon(){mBitmap = null;invalidate();}
}

有了小圆点，我们最后只需要把扫描图和小圆点放在一起就好了
因为我们是想变扫描变出现小圆点，所以我们需要在RadarView中定义一个接口IScanningListener，告诉RadarViewGroup我正在扫描，你快让小圆点出现吧
所以在RadarViewGroup的onScanning中需要调用requestLayout();

package com.zj.custom;import android.animation.ObjectAnimator;
import android.content.Context;
import android.util.AttributeSet;
import android.util.SparseArray;
import android.view.View;
import android.view.ViewGroup;import com.zj.bean.Info;
import com.zj.modelqq.R;
import com.zj.util.LogUtil;/*** Created by jjx on 2016/5/12.*/
public class RadarViewGroup extends ViewGroup implements RadarView.IScanningListener {private int mWidth, mHeight;//viewgroup的宽高private SparseArray<Float> scanAngleList = new SparseArray<>();//记录展示的item所在的扫描位置角度private SparseArray<Info> mDatas;//数据源private int dataLength;//数据源长度private int minItemPosition;//最小距离的item所在数据源中的位置private CircleView currentShowChild;//当前展示的itemprivate CircleView minShowChild;//最小距离的itemprivate IRadarClickListener iRadarClickListener;//雷达图中点击监听CircleView小圆点回调接口public void setiRadarClickListener(IRadarClickListener iRadarClickListener) {this.iRadarClickListener = iRadarClickListener;}public RadarViewGroup(Context context) {this(context, null);}public RadarViewGroup(Context context, AttributeSet attrs) {this(context, attrs, 0);}public RadarViewGroup(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);}@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {setMeasuredDimension(measureSize(widthMeasureSpec), measureSize(heightMeasureSpec));mWidth = getMeasuredWidth();mHeight = getMeasuredHeight();mWidth = mHeight = Math.min(mWidth, mHeight);//测量每个childrenmeasureChildren(widthMeasureSpec, heightMeasureSpec);for (int i = 0; i < getChildCount(); i++) {View child = getChildAt(i);if (child.getId() == R.id.id_scan_circle) {//为雷达扫描图设置需要的属性((RadarView) child).setScanningListener(this);//考虑到数据没有添加前扫描图在扫描，但是不会开始为CircleView布局if (mDatas != null && mDatas.size() > 0) {((RadarView) child).setMaxScanItemCount(mDatas.size());((RadarView) child).startScan();}continue;}}}@Overrideprotected void onLayout(boolean changed, int l, int t, int r, int b) {int childCount = getChildCount();//首先放置雷达扫描图View view = findViewById(R.id.id_scan_circle);if (view != null) {view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());}//放置雷达图中需要展示的item圆点for (int i = 0; i < childCount; i++) {final int j = i;final View child = getChildAt(i);if (child.getId() == R.id.id_scan_circle) {//如果不是Circleview跳过continue;}//设置CircleView小圆点的坐标信息//坐标 = 旋转角度 * 半径 * 根据远近距离的不同计算得到的应该占的半径比例((CircleView) child).setDisX((float) Math.cos(Math.toRadians(scanAngleList.get(i - 1) - 5))* ((CircleView) child).getProportion() * mWidth / 2);((CircleView) child).setDisY((float) Math.sin(Math.toRadians(scanAngleList.get(i - 1) - 5))* ((CircleView) child).getProportion() * mWidth / 2);//如果扫描角度记录SparseArray中的对应的item的值为0，// 说明还没有扫描到该item，跳过对该item的layout//（scanAngleList设置数据时全部设置的value=0，// 当onScanning时，value设置的值始终不会0，具体可以看onScanning中的实现）if (scanAngleList.get(i - 1) == 0) {continue;}//放置Circle小圆点child.layout((int) ((CircleView) child).getDisX() + mWidth / 2, (int) ((CircleView) child).getDisY() + mHeight / 2,(int) ((CircleView) child).getDisX() + child.getMeasuredWidth() + mWidth / 2,(int) ((CircleView) child).getDisY() + child.getMeasuredHeight() + mHeight / 2);//设置点击事件child.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {resetAnim(currentShowChild);currentShowChild = (CircleView) child;//因为雷达图是childAt(0),所以这里需要作-1才是正确的CirclestartAnim(currentShowChild, j - 1);if (iRadarClickListener != null) {iRadarClickListener.onRadarItemClick(j - 1);}}});}}private int measureSize(int measureSpec) {int result = 0;int specMode = MeasureSpec.getMode(measureSpec);int specSize = MeasureSpec.getSize(measureSpec);if (specMode == MeasureSpec.EXACTLY) {result = specSize;} else {result = 300;if (specMode == MeasureSpec.AT_MOST) {result = Math.min(result, specSize);}}return result;}/*** 设置数据** @param mDatas*/public void setDatas(SparseArray<Info> mDatas) {this.mDatas = mDatas;dataLength = mDatas.size();float min = Float.MAX_VALUE;float max = Float.MIN_VALUE;//找到距离的最大值，最小值对应的minItemPositionfor (int j = 0; j < dataLength; j++) {Info item = mDatas.get(j);if (item.getDistance() < min) {min = item.getDistance();minItemPosition = j;}if (item.getDistance() > max) {max = item.getDistance();}scanAngleList.put(j, 0f);}//根据数据源信息动态添加CircleViewfor (int i = 0; i < dataLength; i++) {CircleView circleView = new CircleView(getContext());if (mDatas.get(i).getSex()) {circleView.setPaintColor(getResources().getColor(R.color.bg_color_pink));} else {circleView.setPaintColor(getResources().getColor(R.color.bg_color_blue));}//根据远近距离的不同计算得到的应该占的半径比例 0.312-0.832circleView.setProportion((mDatas.get(i).getDistance() / max + 0.6f) * 0.52f);if (minItemPosition == i) {minShowChild = circleView;}addView(circleView);}}/*** 雷达图没有扫描完毕时回调** @param position* @param scanAngle*/@Overridepublic void onScanning(int position, float scanAngle) {if (scanAngle == 0) {scanAngleList.put(position, 1f);} else {scanAngleList.put(position, scanAngle);}requestLayout();}/*** 雷达图扫描完毕时回调*/@Overridepublic void onScanSuccess() {LogUtil.m("完成回调");resetAnim(currentShowChild);currentShowChild = minShowChild;startAnim(currentShowChild, minItemPosition);}/*** 恢复CircleView小圆点原大小** @param object*/private void resetAnim(CircleView object) {if (object != null) {object.clearPortaitIcon();ObjectAnimator.ofFloat(object, "scaleX", 1f).setDuration(300).start();ObjectAnimator.ofFloat(object, "scaleY", 1f).setDuration(300).start();}}/*** 放大CircleView小圆点大小** @param object* @param position*/private void startAnim(CircleView object, int position) {if (object != null) {object.setPortraitIcon(mDatas.get(position).getPortraitId());ObjectAnimator.ofFloat(object, "scaleX", 2f).setDuration(300).start();ObjectAnimator.ofFloat(object, "scaleY", 2f).setDuration(300).start();}}/*** 雷达图中点击监听CircleView小圆点回调接口*/public interface IRadarClickListener {void onRadarItemClick(int position);}/*** 根据position，放大指定的CircleView小圆点** @param position*/public void setCurrentShowItem(int position) {CircleView child = (CircleView) getChildAt(position + 1);resetAnim(currentShowChild);currentShowChild = child;startAnim(currentShowChild, position);}
}

每次点击雷达图中的小圆点都会告诉ViewPager切换到指定的页面，所以RadarViewGroup中需要定义一个IRadarClickListener，让ViewPager所在的MainAcitivity去实现该接口
完成的效果就是这样了

参考链接

Android超高仿QQ附近的人搜索展示 - Mr_immortalZ的博客 - 博客频道 - CSDN.NET

源码下载

ImmortalZ/RadarScan: 这是Android一个雷达扫描显示的扫描图，超高仿QQ附近的人搜索展示

完成