网上大多的多宫格抽奖都是自定义view，如果view的布局不一样而且太多的话容易出现oom，不好管理

结合RecyclerView实现多宫格抽奖  效果图如下 满足所有矩形多宫格抽奖

9宫格

16宫格

25宫格

也可以不是正方形

比如

4行5列

acitivity的xml

android:id="@+id/recycleView"

android:layout_width="match_parent"

android:layout_height="match_parent" />

recyclerView的adapter下面

LuckRecyclerViewAdapter

/**

* Created by taq on 2018/7/3.

*/

import android.animation.Animator;

import android.animation.AnimatorListenerAdapter;

import android.animation.ValueAnimator;

import android.content.Context;

import android.support.annotation.NonNull;

import android.support.v4.content.ContextCompat;

import android.support.v7.widget.RecyclerView;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ImageView;

import android.widget.RelativeLayout;

import android.widget.TextView;

import android.widget.Toast;

import com.video.baselibrary.R;

import com.video.baselibrary.base.InitialApplication;

import com.video.baselibrary.module.bean.GiftBean;

import com.video.baselibrary.utils.MultiMiyagiRaffle;

import com.video.baselibrary.weight.LuckyView;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.Random;

import static com.video.baselibrary.utils.LogUtilKt.log;

/**

* Created by djajd on 2018/7/3.

*/

public class LuckRecyclerViewAdapter extends RecyclerView.Adapter {

private String TAG="LuckRecyclerViewAdapter";

private RecyclerView recyclerView;

private Context c;

public LuckRecyclerViewAdapter(RecyclerView recyclerView,List list, Context c, MultiMiyagiRaffle.OnLuckAnimationEndListener listener) {

this.c=c;

this.recyclerView=recyclerView;

multiMiyagiRaffle=new MultiMiyagiRaffle(list, new MultiMiyagiRaffle.StatusChange() {

@Override

public void changeClose(int position, boolean ischeck) {

itemChangeClose(position,ischeck);

}

});

multiMiyagiRaffle.setLuckAnimationEndListener(listener);

}

public MultiMiyagiRaffle multiMiyagiRaffle;

@Override

public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

log(TAG,"onCreateViewHolder");

RecyclerView.ViewHolder viewHolder;

if (viewType==1){

View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_luck, parent, false);

viewHolder = new ViewHolder(view);

}else {

View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_luck_empty, parent, false);

viewHolder = new EmptyHolder(view);

}

return viewHolder;

}

@Override

public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {

log(TAG,"onBindViewHolder");

if (multiMiyagiRaffle.luckMap.containsKey(position)){

GiftBean giftBean= (GiftBean) multiMiyagiRaffle.luckMap.get(position);

ViewHolder viewHolder= (ViewHolder) holder;

viewHolder.iv_luck.setImageDrawable(ContextCompat.getDrawable(c,giftBean.getImagPath()));

viewHolder.tv_value.setText(position+"");

viewHolder.tv_list.setText(giftBean.getGiftName());

viewHolder.Container.setSelected(giftBean.isCheked());

}

}

@Override

public int getItemViewType(int position) {

if (multiMiyagiRaffle.luckMap.containsKey(position)){

return 1;

}else return -1;

// return position;

}

@Override

public int getItemCount() {

return MultiMiyagiRaffle.COLUMN*MultiMiyagiRaffle.LINE;

}

class ViewHolder extends RecyclerView.ViewHolder {

TextView tv_value,tv_list;

ImageView iv_luck;

ViewGroup Container;

ViewHolder(View itemView) {

super(itemView);

tv_value=itemView.findViewById(R.id.tv_value);

iv_luck=itemView.findViewById(R.id.iv_luck);

Container=itemView.findViewById(R.id.Container);

tv_list=itemView.findViewById(R.id.tv_list);

}

}

class EmptyHolder extends RecyclerView.ViewHolder {

EmptyHolder(View itemView) {

super(itemView);

}

}

private void itemChangeClose(int position,boolean ischeck) {

LuckRecyclerViewAdapter.ViewHolder viewHolder = (LuckRecyclerViewAdapter.ViewHolder) recyclerView.findViewHolderForAdapterPosition(position);

viewHolder.Container.setSelected(ischeck);

}

}

多宫格抽奖(9宫格以上(3*3)抽奖)的Utils

import android.animation.Animator;

import android.animation.AnimatorListenerAdapter;

import android.animation.ValueAnimator;

import android.widget.Toast;

import com.video.baselibrary.base.InitialApplication;

import com.zhpan.idea.utils.LogUtils;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.Random;

import static com.video.baselibrary.utils.LogUtilKt.log;

/**

* 多宫格抽奖(9宫格以上(3*3)抽奖)

*/

public class MultiMiyagiRaffle {

public static int LINE=4; //行

public static int COLUMN= 3 ;//列

List list;//抽奖的数据列表

// private Integer[]=new Integer[]{0,1,2,3,7,11,15,14,13,12,8,4};

private List luckPosition = new ArrayList<>();

public Map luckMap = new HashMap<>();//抽奖位置和RecyclerView位置对应关系

//动画运行后，选中的item的变化

private StatusChange statusChange;

private void initLuckMap() {

for (int i = 0; i < luckPosition.size(); i++) {

luckMap.put(luckPosition.get(i), list.get(i));

}

}

public MultiMiyagiRaffle( List list, StatusChange statusChange) {

this.list = list;

this.statusChange = statusChange;

getluckPosition();

initLuckMap();

}

public void getluckPosition() {

luckPosition.clear();

//运动顺序为顺时针--按运动顺序加入所有边缘的元素

//1.先加入第一行的所有元素

for (int column = 0; column < COLUMN; column++) {

luckPosition.add(column);

}

//2.加入最后一列的(最后一列的第一行已经加入所以从1开始)

for (int line = 1; line < LINE; line++) {

luckPosition.add(COLUMN * line + (COLUMN - 1));

}

//3.先加入最后一行的所有元素(最后一行的最后一列已经加入所以从1开始)

for (int column = 1; column < COLUMN; column++) {

luckPosition.add((COLUMN * LINE - 1) - column);

}

//4.先加入第一列的所有元素(最后一行的第一行已经加入所以从1开始)

for (int line=LINE-1-1;line>0;line--){

luckPosition.add(COLUMN * line);

}

LogUtils.i("luckPosition", luckPosition.toString());

}

private boolean mShouldStartNextTurn = true; // 标记是否应该开启下一轮抽奖

public void startAnim() {

if (!mShouldStartNextTurn) {

return;

}

Random random = new Random();

setLuckNum(random.nextInt(luckMap.size() - 1)); // 生成 [0,11) 的随机整数

//mLuckNum=2;

log("setCurrentPosition--mLuckNum=", mLuckNum + "");

Toast.makeText(InitialApplication.instance, "预设结果==" + mLuckNum, Toast.LENGTH_SHORT).show();

ValueAnimator animator = ValueAnimator.ofInt(mStartLuckPosition, mRepeatCount * luckMap.size() + mLuckNum)

.setDuration(3000);

animator.setInterpolator( new EaseCubicInterpolator(0.3f, 0.23f,0.2f, 0.9f));//自定义插值器 https://www.cnblogs.com/qiuqiuQaQ/p/11912569.html我的另外一篇文章(转载)

animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {

@Override

public void onAnimationUpdate(ValueAnimator animation) {

final int position = (int) animation.getAnimatedValue();

log("setCurrentPosition==ValueAnimator==", animation.getAnimatedValue() + "");

setCurrentPosition(position % luckMap.size());

mShouldStartNextTurn = false;

}

});

animator.addListener(new AnimatorListenerAdapter() {

@Override

public void onAnimationEnd(Animator animation) {

mShouldStartNextTurn = true;

mStartLuckPosition = mLuckNum;

//最终选中的位置

if (mLuckAnimationEndListener != null) {

mLuckAnimationEndListener.onLuckAnimationEnd(mLuckNum,

"mStartLuckPosition==" + mStartLuckPosition);

}

}

});

animator.start();

}

/**

* 可以通过对 mLuckNum 设置计算策略，来控制用户 中哪些奖 以及 中大奖 的概率

*/

private int mLuckNum = 3; //最终中奖位置(这个值是多少就停在哪个位置)

public void setLuckNum(int luckNum) {

mLuckNum = luckNum;

}

private int mRepeatCount = 3; // 转的圈数

private int mStartLuckPosition = 0; // 开始抽奖的位置

private int mCurrentPosition = -1; // 当前转圈所在的位置

/**

* 用于抽奖结果回调

*/

public interface OnLuckAnimationEndListener {

void onLuckAnimationEnd(int pos, String msg);

}

private OnLuckAnimationEndListener mLuckAnimationEndListener;

public void setLuckAnimationEndListener(OnLuckAnimationEndListener luckAnimationEndListener) {

mLuckAnimationEndListener = luckAnimationEndListener;

}

private void setCurrentPosition(int position) {

if (mCurrentPosition == position) {

return;

}

// log("setCurrentPosition==",position+"");

if (mCurrentPosition != -1) {

int truePosition = luckPosition.get(mCurrentPosition);

// log("setCurrentPosition---last--truePosition",truePosition+"");

statusChange.changeClose(truePosition, false);

}

int truePosition = luckPosition.get(position);

mCurrentPosition = position;

//log("setCurrentPosition---new--truePosition",truePosition+"");

statusChange.changeClose(truePosition, true);

}

public interface StatusChange {

void changeClose(int position, boolean ischeck);

}

}

activity里的使用也很简单

public class TestActivity extends RxAppCompatActivity implements MultiMiyagiRaffle.OnLuckAnimationEndListener{

private RecyclerView recycleView;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_test);

recycleView=findViewById(R.id.recycleView);

//先初始化几行几列

MultiMiyagiRaffle.LINE=4; ----根据你的需要

MultiMiyagiRaffle.COLUMN=5; ----根据你的需要

StaggeredGridLayoutManager manager=new StaggeredGridLayoutManager(MultiMiyagiRaffle.COLUMN, StaggeredGridLayoutManager.VERTICAL);

LuckRecyclerViewAdapter adapter=new LuckRecyclerViewAdapter(recycleView,initData(),this,this);

recycleView.setLayoutManager(manager);

recycleView.setAdapter(adapter);

findViewById(R.id.iv_start).setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View view) {

adapter.multiMiyagiRaffle.startAnim();

}

});

}

private List initData(){

ListgiftBeans=new ArrayList<>();

for (int i=0;i<100;i++){

GiftBean giftBean=new GiftBean(R.drawable.aaa,10,"data"+i);

giftBeans.add(giftBean);

}

//12个数据源

return giftBeans;

}

@Override

public void onLuckAnimationEnd(int pos, String msg) {

//打印抽奖结果

Toast.makeText(getApplicationContext(), "实际结果=="+msg, Toast.LENGTH_SHORT).show();

}

}

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