今天分享一個抽獎的類Lottery，分享抽獎lottery

今天分享一個抽獎的類Lottery，分享抽獎lottery

/* * Copyright (C) 2014 Jason Fang ( ijasonfang@gmail.com ) * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * *      http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */package fyc.framework.anim;import java.util.concurrent.TimeUnit;import android.animation.Animator;import android.animation.Animator.AnimatorListener;import android.animation.ObjectAnimator;import android.animation.ValueAnimator;import android.annotation.TargetApi;import android.os.Build;import android.os.CountDownTimer;import android.view.animation.DecelerateInterpolator;import android.view.animation.LinearInterpolator;import android.widget.ImageView;import fyc.framework.util.Flog;import fyc.framework.util.RandomUtils;/** * @author Jason Fang * @datetime 2015年1月29日 下午7:19:36 */@TargetApi(Build.VERSION_CODES.HONEYCOMB)public class Lottery {    static final boolean DEBUG = true;        private static final int LOADING_UNIT_DEGREE = 360 * 5;    private static final int LOADING_DURATION     = 720 * 5;    private static final long LOTTERY_TIME_OUT     = TimeUnit.SECONDS.toMillis(5);        private ImageView mImageView;    private ObjectAnimator mLoadingAnim;    private float mInitDegree = 0;    private int mMaxLevel = 10;    private int mUnitDegree;    private int[] mLevelMap;    private long mTimeout = LOTTERY_TIME_OUT;        private boolean mIsLottering = false;    private boolean mIsInStop = false;        private OnLotteryListener mListener;    private LotteryTimeOut mLotteryTimeOut;        private Lottery(ImageView imageView, OnLotteryListener listener) {        mImageView = imageView;        mListener = listener;    }        public static Lottery newInstance(ImageView imageView, OnLotteryListener listener) {        return new Lottery(imageView, listener);    }        public Lottery setLevel(int level) {        mMaxLevel = level;        mUnitDegree = 360 / mMaxLevel;        return this;    }        public Lottery setLevelMap(int[] levelMap) {        if (levelMap.length != mMaxLevel) {            throw new IllegalArgumentException("levelMap length must equal MaxLevel!");        }        mLevelMap = levelMap;        return this;    }        public Lottery setTimeOut(int timeout) {        if (timeout <= 0) return this;                mTimeout = TimeUnit.SECONDS.toMillis(timeout);        return this;    }        public Lottery start() {        if (mIsLottering) return this;        mIsLottering = true;                if (DEBUG) Flog.i("start");                loadingAnimStart();                if (mListener != null) {            mListener.onLotteryStart();        }                mLotteryTimeOut = new LotteryTimeOut();        mLotteryTimeOut.start();                return this;    }        public void stop(int level) {        if (mIsInStop) return;        mIsInStop = true;                if (mLotteryTimeOut != null) {            mLotteryTimeOut.cancel();        }                int levelAward = getLevelAward(level);                if (mLoadingAnim != null && mLoadingAnim.isRunning()) {            mLoadingAnim.cancel();        }                if (levelAward < 0 || levelAward > mMaxLevel) {            throw new IllegalArgumentException("level cannot below 0 or than MaxLevel!");        }                float stopDegree = 0;        if (levelAward == 0) {            stopDegree = LOADING_UNIT_DEGREE - mUnitDegree / 2;        } else {            stopDegree = (LOADING_UNIT_DEGREE - mUnitDegree / 2) + RandomUtils.getRandom(mUnitDegree * levelAward + 5, mUnitDegree * (levelAward + 1) - 5);        }                float startDegree = 0f;        if (mLoadingAnim != null) {            startDegree = (Float)mLoadingAnim.getAnimatedValue() % 360;        } else {            throw new RuntimeException("Must invoke start first!");        }                long duration = (long)((stopDegree - startDegree) / ((LOADING_UNIT_DEGREE / (float)LOADING_DURATION)));                stopAnimStart(startDegree, stopDegree, duration, levelAward);                mInitDegree = stopDegree;    }        int getLevelAward(int level) {        if (mLevelMap == null || mLevelMap.length == 0 || level == 0) return level;        return mLevelMap[level - 1];    }        void loadingAnimStart() {        mLoadingAnim = ObjectAnimator.ofFloat(mImageView, "rotation", mInitDegree % 360, LOADING_UNIT_DEGREE);        mLoadingAnim.setInterpolator(new LinearInterpolator());        mLoadingAnim.setRepeatCount(ValueAnimator.INFINITE);        mLoadingAnim.setDuration(LOADING_DURATION);        mLoadingAnim.start();    }        void stopAnimStart(float startDegree, float stopDegree, long duration, int levelAward) {        ObjectAnimator anim = ObjectAnimator.ofFloat(mImageView, "rotation", startDegree, stopDegree);        anim.setInterpolator(new DecelerateInterpolator());        anim.setDuration(duration * 2);        anim.addListener(new LotteryAnimatorListener(levelAward));        anim.start();    }        class LotteryTimeOut extends CountDownTimer {        public LotteryTimeOut() {            super(mTimeout, mTimeout);        }        @Override        public void onTick(long millisUntilFinished) {        }        @Override        public void onFinish() {            stop(0);        }            }        class LotteryAnimatorListener implements AnimatorListener {        private int mLevel;                public LotteryAnimatorListener() {        }                public LotteryAnimatorListener(int level) {            mLevel = level;        }                @Override        public void onAnimationStart(Animator animation) {        }        @Override        public void onAnimationEnd(Animator animation) {            if (mListener != null) {                mListener.onLotteryStop(mLevel);                mIsLottering = false;                mIsInStop = false;            }        }        @Override        public void onAnimationCancel(Animator animation) {        }        @Override        public void onAnimationRepeat(Animator animation) {        }            }        public interface OnLotteryListener {        public void onLotteryStart();        public void onLotteryStop(int level);    }}

如果要指標初始化指向圓盤的縫隙. 需要做簡要的修改!

DEMO

mLottery = Lottery.newInstance(mWheel, new OnLotteryListener() {                        @Override            public void onLotteryStop(int level) {                Flog.i("onLotteryStop:" + level);            }                        @Override            public void onLotteryStart() {                Flog.i("onLotteryStart");            }        })        .setLevel(10)　　//總共幾個獎        .setLevelMap(new int[]{5, 1, 1, 1, 1, 1, 1, 1, 1, 1}) //映射獎項        .setTimeOut(4);

擷取到伺服器端值之後調用

mLottery.stop(5);　　//參數為幾等獎