搶購(gòu)倒計(jì)時(shí)自定義控件的實(shí)現(xiàn)與優(yōu)化

public interface OnCountDownTimerListener {    /**     * 倒計(jì)時(shí)正在進(jìn)行時(shí)調(diào)用的方法     *     * @param millisUntilFinished 剩余的時(shí)間（毫秒）     */    void onRemain(long millisUntilFinished);     /**     * 倒計(jì)時(shí)結(jié)束     */    void onFinish();     /**     * 每過(guò)一分鐘調(diào)用的方法     */    void onArrivalOneMinute(); }

private void init() {     mDayTextView = findViewById(R.id.days_tv);     mHourTextView = findViewById(R.id.hours_tv);     mMinTextView = findViewById(R.id.min_tv);     mSecondTextView = findViewById(R.id.sec_tv);     mHeaderText = findViewById(R.id.header_tv);     mDayText = findViewById(R.id.new_arrival_day); }

private void setSecond(long millis) {      long day = millis / ONE_DAY;     long hour = millis / ONE_HOUR - day * 24;     long min = millis / ONE_MIN - day * 24 * 60 - hour * 60;     long sec = millis / ONE_SEC - day * 24 * 60 * 60 - hour * 60 * 60 - min * 60;      String second = (int) sec + ""; // 秒     String minute = (int) min + ""; // 分     String hours = (int) hour + ""; // 時(shí)     String days = (int) day + ""; //天      if (hours.length() == 1) {         hours = "0" + hours;     }     if (minute.length() == 1) {         minute = "0" + minute;     }     if (second.length() == 1) {         second = "0" + second;     }      if (day == 0) {         mDayTextView.setVisibility(GONE);         mDayText.setVisibility(GONE);     } else {         setDayText(day);         mDayTextView.setVisibility(VISIBLE);         mDayText.setVisibility(VISIBLE);     }      mDayTextView.setText(days);      if (mFirstSetTimer) {         mHourTextView.setInitialNumber(hours);         mMinTextView.setInitialNumber(minute);         mSecondTextView.setInitialNumber(second);         mFirstSetTimer = false;     } else {         mHourTextView.flipNumber(hours);         mMinTextView.flipNumber(minute);         mSecondTextView.flipNumber(second);     } }

private void createCountDownTimer(final int eventStatus) {       if (mCountDownTimer != null) {           mCountDownTimer.cancel();       }       mCountDownTimer = new CountDownTimer(mMillis, 1000) {           @Override           public void onTick(long millisUntilFinished) {               //策劃要求：倒計(jì)時(shí)為00:00:01時(shí)，活動(dòng)狀態(tài)刷新，倒計(jì)時(shí)不展示00:00:00這個(gè)狀態(tài)               if (millisUntilFinished >= ONE_SEC) {                   setSecond(millisUntilFinished);                   //當(dāng)活動(dòng)狀態(tài)為進(jìn)行中時(shí)，每隔一分鐘調(diào)用一次回調(diào)                   if (eventStatus == HomeItemViewNewArrival.EVENT_START) {                       mArrivalOneMinuteFlag--;                       if (mArrivalOneMinuteFlag == Constant.ZERO) {                           mArrivalOneMinuteFlag = Constant.SIXTY;                           mOnCountDownTimerListener.onArrivalOneMinute();                       }                   }               }           }            @Override           public void onFinish() {               mOnCountDownTimerListener.onFinish();           }       };   }

public void setDownTimerListener(OnCountDownTimerListener listener) {    this.mOnCountDownTimerListener = listener;}

public void setDownTime(long millis) {    this.mMillis = millis;}  public void setHeaderText(int eventStatus) {    if (eventStatus == HomeItemViewNewArrival.EVENT_NOT_START) {        mHeaderText.setText("Start in");    } else {        mHeaderText.setText("Ends in");    }}

public void startDownTimer(int eventStatus) {        mArrivalOneMinuteFlag = Constant.SIXTY;        mFirstSetTimer = true;        //設(shè)置需要倒計(jì)時(shí)的初始值        setSecond(mMillis);        createCountDownTimer(eventStatus);// 創(chuàng)建倒計(jì)時(shí)        mCountDownTimer.start();    }     public void cancelDownTimer() {        mCountDownTimer.cancel();    }

if (view != null) {            view.setDownTime(mDuration);            view.setHeaderText(mEventStatus);            view.startDownTimer(mEventStatus);            view.setDownTimerListener(new BaseCountDownTimerView.OnCountDownTimerListener() {                @Override                public void onRemain(long millisUntilFinished) {                 }                 @Override                public void onFinish() {                    view.cancelDownTimer();                    if (bean.mNewArrivalType == TYPE_EVENT && mEventStatus == EVENT_START) {                        mEventStatus = EVENT_END;                        //活動(dòng)狀態(tài)之前為進(jìn)行中，倒計(jì)時(shí)變?yōu)?，如果還有下一個(gè)活動(dòng)/新品，則刷新為下一個(gè)活動(dòng)/新品的數(shù)據(jù)                        refreshNewArrivalBeanDate(bean);                        onBindView(bean, 1, true, null);                    } else {                        setEventStatus(bean);                    }                }                 @Override                public void onArrivalOneMinute() {                 }            });

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="@dimen/qb_px_48">     <com.example.website.general.ui.widget.TextView        android:id="@+id/new_arrival_txt"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentStart="true"        android:layout_centerInParent="true"        android:layout_marginStart="@dimen/qb_px_20"        android:text="@string/new_arrival"        android:textColor="@color/common_color_de000000"        android:textSize="@dimen/qb_px_16"        android:textStyle="bold" />     <com.example.website.widget.BaseCountDownTimerView        android:id="@+id/count_down_timer_short"        android:layout_width="wrap_content"        android:layout_height="match_parent"        android:layout_alignParentEnd="true"        android:layout_marginEnd="@dimen/qb_px_20"        android:gravity="center_vertical" />RelativeLayout>

<merge xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:orientation="vertical"    tools:parentTag="android.widget.LinearLayout">     <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:orientation="vertical">         <include layout="@layout/main_view_header_new_arrival"/>         <com.example.website.widget.BaseCountDownTimerView            android:id="@+id/count_down_timer_long"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:layout_alignParentStart="true"            android:layout_marginStart="@dimen/qb_px_20"            android:layout_marginTop="@dimen/qb_px_n_4"            android:layout_marginEnd="@dimen/qb_px_20"            android:layout_marginBottom="@dimen/qb_px_8"            android:gravity="center_vertical" />    LinearLayout> merge>

View.inflate(getContext(), R.layout.main_list_item_home_new_arrival, this);mBaseCountDownTimerViewShort = findViewById(R.id.count_down_timer_short); //行尾倒計(jì)時(shí)viewmBaseCountDownTimerViewLong = findViewById(R.id.count_down_timer_long); //次行行首倒計(jì)時(shí)view

private boolean isShortCountDownTimerViewShow() {        String languageCode = LocaleManager.getInstance().getCurrentLanguage();        if (Constant.EN_US.equals(languageCode) || Constant.EN_GB.equals(languageCode) || Constant.EN_AU.equals(languageCode)) {            //因策劃要求，美式英語(yǔ)、英國(guó)英語(yǔ)、澳大利亞英語(yǔ)，強(qiáng)制在New Arrivals標(biāo)題欄右側(cè)展示            return true;        } else {            View newArrivalHeader = inflate(mContext, R.layout.main_view_header_new_arrival, null);            TextView newArrivalTextView = newArrivalHeader.findViewById(R.id.new_arrival_txt);            LinearLayout countDownTimer = newArrivalHeader.findViewById(R.id.count_down_timer_short);            int measureSpecW = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);            int measureSpecH = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);            newArrivalTextView.measure(measureSpecW, measureSpecH);            countDownTimer.measure(measureSpecW, measureSpecH);            VLog.i(TAG, countDownTimer.getMeasuredWidth() + "--" + newArrivalTextView.getMeasuredWidth());             if (countDownTimer.getMeasuredWidth() + newArrivalTextView.getMeasuredWidth() <= mContext.getResources().getDimensionPixelSize(R.dimen.qb_px_302)) {                return true;            } else {                return false;            }        }    }

if (isShortCountDownTimerViewShow()) {               initCountDownTimerView(mBaseCountDownTimerViewShort, bean);               mBaseCountDownTimerViewShort.setVisibility(VISIBLE);               mBaseCountDownTimerViewLong.setVisibility(GONE);           } else {               initCountDownTimerView(mBaseCountDownTimerViewLong, bean);               mBaseCountDownTimerViewShort.setVisibility(GONE);               mBaseCountDownTimerViewLong.setVisibility(VISIBLE);           }

//構(gòu)造函數(shù)public NumberFlipView(Context context, @Nullable AttributeSet attrs) {    super(context, attrs);     mResources = context.getResources();    //最大滾動(dòng)高度18dp    mMaxMoveHeight = mResources.getDimensionPixelSize(R.dimen.qb_px_18);     //設(shè)置畫筆相關(guān)屬性    setPaint();} //設(shè)置畫筆相關(guān)屬性private void setPaint() {    //設(shè)置繪制數(shù)字為白色    mPaint.setColor(Color.WHITE);    //設(shè)置繪制數(shù)字樣式為實(shí)心    mPaint.setStyle(Paint.Style.FILL);    //設(shè)置繪制數(shù)字字體加粗    mPaint.setFakeBoldText(true);    //設(shè)置繪制文字大小14dp    mPaint.setTextSize(mResources.getDimensionPixelSize(R.dimen.qb_px_14));}

//拆分新數(shù)字成為新數(shù)字?jǐn)?shù)組for (int i = 0; i < mNewNumber.length(); i++) {    mNewNumberArray.add(String.valueOf(mNewNumber.charAt(i)));} //拆分老數(shù)字成為老數(shù)字?jǐn)?shù)組for (int i = 0; i < mOldNumber.length(); i++) {    mOldNumberArray.add(String.valueOf(mOldNumber.charAt(i)));}

//兩位數(shù)的newNumber的文字寬度int textWidth = mResources.getDimensionPixelSize(R.dimen.qb_px_16); float curTextWidth = 0; for (int i = 0; i < mNewNumberArray.size(); i++) {    //newNumber中每個(gè)數(shù)字的邊界    mPaint.getTextBounds(mNewNumberArray.get(i), 0, mNewNumberArray.get(i).length(), mTextRect);    //newNumber中每個(gè)數(shù)字的寬度    int numWidth = mResources.getDimensionPixelSize(R.dimen.qb_px_5);     //逐位判斷舊數(shù)字和新數(shù)字是否相同    if (mNewNumberArray.get(i).equals(mOldNumberArray.get(i))) {        //數(shù)字相同，直接繪制新數(shù)字        canvas.drawText(mNewNumberArray.get(i), getWidth() * ONE_HALF - textWidth * ONE_HALF + curTextWidth,        getHeight() * ONE_HALF + mTextRect.height() * ONE_HALF, mPaint);     } else {        //數(shù)字不相同，舊數(shù)字和新數(shù)字均需要移動(dòng)        canvas.drawText(mOldNumberArray.get(i), getWidth() * ONE_HALF - textWidth * ONE_HALF + curTextWidth,        mOldNumberMoveHeight + getHeight() * ONE_HALF + mTextRect.height() * ONE_HALF, mPaint);         canvas.drawText(mNewNumberArray.get(i), getWidth() * ONE_HALF - textWidth * ONE_HALF + curTextWidth,        mNewNumberMoveHeight + getHeight() * ONE_HALF + mTextRect.height() * ONE_HALF, mPaint);     }     curTextWidth += (numWidth + mResources.getDimensionPixelSize(R.dimen.qb_px_3));

/*利用ValueAnimator，在規(guī)定時(shí)間FLIP_NUMBER_DURATION之內(nèi)，將值從MAX_MOVE_HEIGHT變?yōu)?，每次值變化都賦給mNewNumberMoveHeight，同時(shí)將mNewNumberMoveHeight - MAX_MOVE_HEIGHT的值賦給mOldNumberMoveHeight，并重新繪制，實(shí)現(xiàn)新數(shù)字和舊數(shù)字的上滑； */mNumberAnimator = ValueAnimator.ofFloat(mMaxMoveHeight, 0);mNumberAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {    @Override    public void onAnimationUpdate(ValueAnimator animation) {        mNewNumberMoveHeight = (float) animation.getAnimatedValue();        mOldNumberMoveHeight = mNewNumberMoveHeight - mMaxMoveHeight;        invalidate();    }});mNumberAnimator.setDuration(FLIP_NUMBER_DURATION);mNumberAnimator.start();

<com.example.materialdesginpractice.NumberFlipView    android:id="@+id/hours_tv"    android:layout_width="@dimen/qb_px_22"    android:layout_height="@dimen/qb_px_18"    android:gravity="center"    android:background="@drawable/number_bg"    android:textSize="@dimen/qb_px_14"    android:textColor="@color/common_color_ffffff"/>  <com.example.materialdesginpractice.NumberFlipView    android:id="@+id/min_tv"    android:layout_width="@dimen/qb_px_22"    android:layout_height="@dimen/qb_px_18"    android:gravity="center"    android:background="@drawable/number_bg"    android:textSize="@dimen/qb_px_14"    android:textColor="@color/common_color_ffffff"/> <com.example.materialdesginpractice.NumberFlipView    android:id="@+id/sec_tv"    android:layout_width="@dimen/qb_px_22"    android:layout_height="@dimen/qb_px_18"    android:gravity="center"    android:background="@drawable/number_bg"    android:textSize="@dimen/qb_px_14"    android:textColor="@color/common_color_ffffff"/>

mHourTextView = findViewById(R.id.hours_tv);mMinTextView = findViewById(R.id.min_tv);mSecondTextView = findViewById(R.id.sec_tv);

if (mFirstSetTimer) {    mHourTextView.setInitialNumber(hours);    mMinTextView.setInitialNumber(minute);    mSecondTextView.setInitialNumber(second);    mFirstSetTimer = false;} else {    mHourTextView.flipNumber(hours);    mMinTextView.flipNumber(minute);    mSecondTextView.flipNumber(second);}

@Overrideprotected void onDetachedFromWindow() {    super.onDetachedFromWindow();    //移出屏幕調(diào)用，暫停倒計(jì)時(shí)    stopCountDownTimerAndAnimation();}

@Overrideprotected void onDetachedFromWindow() {    super.onDetachedFromWindow();    //移出屏幕調(diào)用，暫停倒計(jì)時(shí)    stopCountDownTimerAndAnimation();}

@Overridepublic void onFragmentHide() {    super.onFragmentHide();     //暫停倒計(jì)時(shí)    stopNewArrivalCountDownTimerAndAnimation();}

/** * 獲取倒計(jì)時(shí)控件所在的view對(duì)象，暫停倒計(jì)時(shí) */private void stopNewArrivalCountDownTimerAndAnimation() {    if (mListView != null) {        for (int index = 0; index < mListView.getChildCount(); index++) {            View view = mListView.getChildAt(index);            if (view instanceof HomeItemViewNewArrival) {                ((HomeItemViewNewArrival) view).stopCountDownTimerAndAnimation();            }        }    }}

@Overridepublic void onStop() {    super.onStop();     //暫停倒計(jì)時(shí)    stopNewArrivalCountDownTimerAndAnimation();}

@Overridepublic void onResume() {    super.onResume();    //重新開始倒計(jì)時(shí)    refreshNewArrival();}