Android(安卓)时间选择器年 月 日
16lz
2021-01-24
Android 时间选择器(年月日不嵌套)
前言
- 日期选择器(DatePickerView)
- 如果这个效果不适合您,可以看看我之前写的另个选择器 链接
- 在使用 DatePicker 控件显示日期时，通常是使用 < DatePickerView>标记在XML布局文件中配置，基本用法如下
接下来我们看下效果图:
在开发中我们可以根据自己写需求进行选择是否带有分秒样式,判断是否显示时和分
customDatePicker.showSpecificTime(true); // 不显示时和分 customDatePicker.setIsLoop(false); // 不允许循环滚动废话不多说我们直接上代码:
首先我们看下CustomDatePicker:
import android.animation.ObjectAnimator;import android.animation.PropertyValuesHolder;import android.app.Dialog;import android.content.Context;import android.util.DisplayMetrics;import android.view.Gravity;import android.view.View;import android.view.Window;import android.view.WindowManager;import android.widget.TextView;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Calendar;import java.util.Locale;public class CustomDatePicker { /** * 定义结果回调接口 */ public interface ResultHandler { void handle(String time); } public enum SCROLL_TYPE { HOUR(1), MINUTE(2); SCROLL_TYPE(int value) { this.value = value; } public int value; } private int scrollUnits = SCROLL_TYPE.HOUR.value + SCROLL_TYPE.MINUTE.value; private ResultHandler handler; private Context context; private boolean canAccess = false; private Dialog datePickerDialog; private DatePickerView year_pv, month_pv, day_pv, hour_pv, minute_pv; private static final int MAX_MINUTE = 59; private static final int MAX_HOUR = 23; private static final int MIN_MINUTE = 0; private static final int MIN_HOUR = 0; private static final int MAX_MONTH = 12; private ArrayList year, month, day, hour, minute; private int startYear, startMonth, startDay, startHour, startMinute, endYear, endMonth, endDay, endHour, endMinute; private boolean spanYear, spanMon, spanDay, spanHour, spanMin; private Calendar selectedCalender, startCalendar, endCalendar; private TextView tv_cancle, tv_select, hour_text, minute_text; public CustomDatePicker(Context context, ResultHandler resultHandler, String startDate, String endDate) { if (isValidDate(startDate, "yyyy-MM-dd HH:mm") && isValidDate(endDate, "yyyy-MM-dd HH:mm")) { canAccess = true; this.context = context; this.handler = resultHandler; selectedCalender = Calendar.getInstance(); startCalendar = Calendar.getInstance(); endCalendar = Calendar.getInstance(); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm", Locale.CHINA); try { startCalendar.setTime(sdf.parse(startDate)); endCalendar.setTime(sdf.parse(endDate)); } catch (ParseException e) { e.printStackTrace(); } initDialog(); initView(); } } private void initDialog() { if (datePickerDialog == null) { datePickerDialog = new Dialog(context, R.style.time_dialog); datePickerDialog.setCancelable(false); datePickerDialog.requestWindowFeature(Window.FEATURE_NO_TITLE); datePickerDialog.setContentView(R.layout.custom_date_picker); Window window = datePickerDialog.getWindow(); window.setGravity(Gravity.BOTTOM); WindowManager manager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE); DisplayMetrics dm = new DisplayMetrics(); manager.getDefaultDisplay().getMetrics(dm); WindowManager.LayoutParams lp = window.getAttributes(); lp.width = dm.widthPixels; window.setAttributes(lp); } } private void initView() { year_pv = (DatePickerView) datePickerDialog.findViewById(R.id.year_pv); month_pv = (DatePickerView) datePickerDialog.findViewById(R.id.month_pv); day_pv = (DatePickerView) datePickerDialog.findViewById(R.id.day_pv); hour_pv = (DatePickerView) datePickerDialog.findViewById(R.id.hour_pv); minute_pv = (DatePickerView) datePickerDialog.findViewById(R.id.minute_pv); tv_cancle = (TextView) datePickerDialog.findViewById(R.id.tv_cancle); tv_select = (TextView) datePickerDialog.findViewById(R.id.tv_select); hour_text = (TextView) datePickerDialog.findViewById(R.id.hour_text); minute_text = (TextView) datePickerDialog.findViewById(R.id.minute_text); tv_cancle.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { datePickerDialog.dismiss(); } }); tv_select.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm", Locale.CHINA); handler.handle(sdf.format(selectedCalender.getTime())); datePickerDialog.dismiss(); } }); } private void initParameter() { startYear = startCalendar.get(Calendar.YEAR); startMonth = startCalendar.get(Calendar.MONTH) + 1; startDay = startCalendar.get(Calendar.DAY_OF_MONTH); startHour = startCalendar.get(Calendar.HOUR_OF_DAY); startMinute = startCalendar.get(Calendar.MINUTE); endYear = endCalendar.get(Calendar.YEAR); endMonth = endCalendar.get(Calendar.MONTH) + 1; endDay = endCalendar.get(Calendar.DAY_OF_MONTH); endHour = endCalendar.get(Calendar.HOUR_OF_DAY); endMinute = endCalendar.get(Calendar.MINUTE); spanYear = startYear != endYear; spanMon = (!spanYear) && (startMonth != endMonth); spanDay = (!spanMon) && (startDay != endDay); spanHour = (!spanDay) && (startHour != endHour); spanMin = (!spanHour) && (startMinute != endMinute); selectedCalender.setTime(startCalendar.getTime()); } private void initTimer() { initArrayList(); if (spanYear) { for (int i = startYear; i <= endYear; i++) { year.add(String.valueOf(i)); } for (int i = startMonth; i <= MAX_MONTH; i++) { month.add(formatTimeUnit(i)); } for (int i = startDay; i <= startCalendar.getActualMaximum(Calendar.DAY_OF_MONTH); i++) { day.add(formatTimeUnit(i)); } if ((scrollUnits & SCROLL_TYPE.HOUR.value) != SCROLL_TYPE.HOUR.value) { hour.add(formatTimeUnit(startHour)); } else { for (int i = startHour; i <= MAX_HOUR; i++) { hour.add(formatTimeUnit(i)); } } if ((scrollUnits & SCROLL_TYPE.MINUTE.value) != SCROLL_TYPE.MINUTE.value) { minute.add(formatTimeUnit(startMinute)); } else { for (int i = startMinute; i <= MAX_MINUTE; i++) { minute.add(formatTimeUnit(i)); } } } else if (spanMon) { year.add(String.valueOf(startYear)); for (int i = startMonth; i <= endMonth; i++) { month.add(formatTimeUnit(i)); } for (int i = startDay; i <= startCalendar.getActualMaximum(Calendar.DAY_OF_MONTH); i++) { day.add(formatTimeUnit(i)); } if ((scrollUnits & SCROLL_TYPE.HOUR.value) != SCROLL_TYPE.HOUR.value) { hour.add(formatTimeUnit(startHour)); } else { for (int i = startHour; i <= MAX_HOUR; i++) { hour.add(formatTimeUnit(i)); } } if ((scrollUnits & SCROLL_TYPE.MINUTE.value) != SCROLL_TYPE.MINUTE.value) { minute.add(formatTimeUnit(startMinute)); } else { for (int i = startMinute; i <= MAX_MINUTE; i++) { minute.add(formatTimeUnit(i)); } } } else if (spanDay) { year.add(String.valueOf(startYear)); month.add(formatTimeUnit(startMonth)); for (int i = startDay; i <= endDay; i++) { day.add(formatTimeUnit(i)); } if ((scrollUnits & SCROLL_TYPE.HOUR.value) != SCROLL_TYPE.HOUR.value) { hour.add(formatTimeUnit(startHour)); } else { for (int i = startHour; i <= MAX_HOUR; i++) { hour.add(formatTimeUnit(i)); } } if ((scrollUnits & SCROLL_TYPE.MINUTE.value) != SCROLL_TYPE.MINUTE.value) { minute.add(formatTimeUnit(startMinute)); } else { for (int i = startMinute; i <= MAX_MINUTE; i++) { minute.add(formatTimeUnit(i)); } } } else if (spanHour) { year.add(String.valueOf(startYear)); month.add(formatTimeUnit(startMonth)); day.add(formatTimeUnit(startDay)); if ((scrollUnits & SCROLL_TYPE.HOUR.value) != SCROLL_TYPE.HOUR.value) { hour.add(formatTimeUnit(startHour)); } else { for (int i = startHour; i <= endHour; i++) { hour.add(formatTimeUnit(i)); } } if ((scrollUnits & SCROLL_TYPE.MINUTE.value) != SCROLL_TYPE.MINUTE.value) { minute.add(formatTimeUnit(startMinute)); } else { for (int i = startMinute; i <= MAX_MINUTE; i++) { minute.add(formatTimeUnit(i)); } } } else if (spanMin) { year.add(String.valueOf(startYear)); month.add(formatTimeUnit(startMonth)); day.add(formatTimeUnit(startDay)); hour.add(formatTimeUnit(startHour)); if ((scrollUnits & SCROLL_TYPE.MINUTE.value) != SCROLL_TYPE.MINUTE.value) { minute.add(formatTimeUnit(startMinute)); } else { for (int i = startMinute; i <= endMinute; i++) { minute.add(formatTimeUnit(i)); } } } loadComponent(); } /** * 将“0-9”转换为“00-09” */ private String formatTimeUnit(int unit) { return unit < 10 ? "0" + String.valueOf(unit) : String.valueOf(unit); } private void initArrayList() { if (year == null) year = new ArrayList<>(); if (month == null) month = new ArrayList<>(); if (day == null) day = new ArrayList<>(); if (hour == null) hour = new ArrayList<>(); if (minute == null) minute = new ArrayList<>(); year.clear(); month.clear(); day.clear(); hour.clear(); minute.clear(); } private void loadComponent() { year_pv.setData(year); month_pv.setData(month); day_pv.setData(day); hour_pv.setData(hour); minute_pv.setData(minute); year_pv.setSelected(0); month_pv.setSelected(0); day_pv.setSelected(0); hour_pv.setSelected(0); minute_pv.setSelected(0); executeScroll(); } private void addListener() { year_pv.setOnSelectListener(new DatePickerView.onSelectListener() { @Override public void onSelect(String text) { selectedCalender.set(Calendar.YEAR, Integer.parseInt(text)); monthChange(); } }); month_pv.setOnSelectListener(new DatePickerView.onSelectListener() { @Override public void onSelect(String text) { selectedCalender.set(Calendar.DAY_OF_MONTH, 1); selectedCalender.set(Calendar.MONTH, Integer.parseInt(text) - 1); dayChange(); } }); day_pv.setOnSelectListener(new DatePickerView.onSelectListener() { @Override public void onSelect(String text) { selectedCalender.set(Calendar.DAY_OF_MONTH, Integer.parseInt(text)); hourChange(); } }); hour_pv.setOnSelectListener(new DatePickerView.onSelectListener() { @Override public void onSelect(String text) { selectedCalender.set(Calendar.HOUR_OF_DAY, Integer.parseInt(text)); minuteChange(); } }); minute_pv.setOnSelectListener(new DatePickerView.onSelectListener() { @Override public void onSelect(String text) { selectedCalender.set(Calendar.MINUTE, Integer.parseInt(text)); } }); } private void monthChange() { month.clear(); int selectedYear = selectedCalender.get(Calendar.YEAR); if (selectedYear == startYear) { for (int i = startMonth; i <= MAX_MONTH; i++) { month.add(formatTimeUnit(i)); } } else if (selectedYear == endYear) { for (int i = 1; i <= endMonth; i++) { month.add(formatTimeUnit(i)); } } else { for (int i = 1; i <= MAX_MONTH; i++) { month.add(formatTimeUnit(i)); } } selectedCalender.set(Calendar.MONTH, Integer.parseInt(month.get(0)) - 1); month_pv.setData(month); month_pv.setSelected(0); executeAnimator(month_pv); month_pv.postDelayed(new Runnable() { @Override public void run() { dayChange(); } }, 100); } private void dayChange() { day.clear(); int selectedYear = selectedCalender.get(Calendar.YEAR); int selectedMonth = selectedCalender.get(Calendar.MONTH) + 1; if (selectedYear == startYear && selectedMonth == startMonth) { for (int i = startDay; i <= selectedCalender.getActualMaximum(Calendar.DAY_OF_MONTH); i++) { day.add(formatTimeUnit(i)); } } else if (selectedYear == endYear && selectedMonth == endMonth) { for (int i = 1; i <= endDay; i++) { day.add(formatTimeUnit(i)); } } else { for (int i = 1; i <= selectedCalender.getActualMaximum(Calendar.DAY_OF_MONTH); i++) { day.add(formatTimeUnit(i)); } } selectedCalender.set(Calendar.DAY_OF_MONTH, Integer.parseInt(day.get(0))); day_pv.setData(day); day_pv.setSelected(0); executeAnimator(day_pv); day_pv.postDelayed(new Runnable() { @Override public void run() { hourChange(); } }, 100); } private void hourChange() { if ((scrollUnits & SCROLL_TYPE.HOUR.value) == SCROLL_TYPE.HOUR.value) { hour.clear(); int selectedYear = selectedCalender.get(Calendar.YEAR); int selectedMonth = selectedCalender.get(Calendar.MONTH) + 1; int selectedDay = selectedCalender.get(Calendar.DAY_OF_MONTH); if (selectedYear == startYear && selectedMonth == startMonth && selectedDay == startDay) { for (int i = startHour; i <= MAX_HOUR; i++) { hour.add(formatTimeUnit(i)); } } else if (selectedYear == endYear && selectedMonth == endMonth && selectedDay == endDay) { for (int i = MIN_HOUR; i <= endHour; i++) { hour.add(formatTimeUnit(i)); } } else { for (int i = MIN_HOUR; i <= MAX_HOUR; i++) { hour.add(formatTimeUnit(i)); } } selectedCalender.set(Calendar.HOUR_OF_DAY, Integer.parseInt(hour.get(0))); hour_pv.setData(hour); hour_pv.setSelected(0); executeAnimator(hour_pv); } hour_pv.postDelayed(new Runnable() { @Override public void run() { minuteChange(); } }, 100); } private void minuteChange() { if ((scrollUnits & SCROLL_TYPE.MINUTE.value) == SCROLL_TYPE.MINUTE.value) { minute.clear(); int selectedYear = selectedCalender.get(Calendar.YEAR); int selectedMonth = selectedCalender.get(Calendar.MONTH) + 1; int selectedDay = selectedCalender.get(Calendar.DAY_OF_MONTH); int selectedHour = selectedCalender.get(Calendar.HOUR_OF_DAY); if (selectedYear == startYear && selectedMonth == startMonth && selectedDay == startDay && selectedHour == startHour) { for (int i = startMinute; i <= MAX_MINUTE; i++) { minute.add(formatTimeUnit(i)); } } else if (selectedYear == endYear && selectedMonth == endMonth && selectedDay == endDay && selectedHour == endHour) { for (int i = MIN_MINUTE; i <= endMinute; i++) { minute.add(formatTimeUnit(i)); } } else { for (int i = MIN_MINUTE; i <= MAX_MINUTE; i++) { minute.add(formatTimeUnit(i)); } } selectedCalender.set(Calendar.MINUTE, Integer.parseInt(minute.get(0))); minute_pv.setData(minute); minute_pv.setSelected(0); executeAnimator(minute_pv); } executeScroll(); } private void executeAnimator(View view) { PropertyValuesHolder pvhX = PropertyValuesHolder.ofFloat("alpha", 1f, 0f, 1f); PropertyValuesHolder pvhY = PropertyValuesHolder.ofFloat("scaleX", 1f, 1.3f, 1f); PropertyValuesHolder pvhZ = PropertyValuesHolder.ofFloat("scaleY", 1f, 1.3f, 1f); ObjectAnimator.ofPropertyValuesHolder(view, pvhX, pvhY, pvhZ).setDuration(200).start(); } private void executeScroll() { year_pv.setCanScroll(year.size() > 1); month_pv.setCanScroll(month.size() > 1); day_pv.setCanScroll(day.size() > 1); hour_pv.setCanScroll(hour.size() > 1 && (scrollUnits & SCROLL_TYPE.HOUR.value) == SCROLL_TYPE.HOUR.value); minute_pv.setCanScroll(minute.size() > 1 && (scrollUnits & SCROLL_TYPE.MINUTE.value) == SCROLL_TYPE.MINUTE.value); } private int disScrollUnit(SCROLL_TYPE... scroll_types) { if (scroll_types == null || scroll_types.length == 0) { scrollUnits = SCROLL_TYPE.HOUR.value + SCROLL_TYPE.MINUTE.value; } else { for (SCROLL_TYPE scroll_type : scroll_types) { scrollUnits ^= scroll_type.value; } } return scrollUnits; } public void show(String time) { if (canAccess) { if (isValidDate(time, "yyyy-MM-dd")) { if (startCalendar.getTime().getTime() < endCalendar.getTime().getTime()) { canAccess = true; initParameter(); initTimer(); addListener(); setSelectedTime(time); datePickerDialog.show(); } } else { canAccess = false; } } } /** * 设置日期控件是否显示时和分 */ public void showSpecificTime(boolean show) { if (canAccess) { if (show) { disScrollUnit(); hour_pv.setVisibility(View.VISIBLE); hour_text.setVisibility(View.VISIBLE); minute_pv.setVisibility(View.VISIBLE); minute_text.setVisibility(View.VISIBLE); } else { disScrollUnit(SCROLL_TYPE.HOUR, SCROLL_TYPE.MINUTE); hour_pv.setVisibility(View.GONE); hour_text.setVisibility(View.GONE); minute_pv.setVisibility(View.GONE); minute_text.setVisibility(View.GONE); } } } /** * 设置日期控件是否可以循环滚动 */ public void setIsLoop(boolean isLoop) { if (canAccess) { this.year_pv.setIsLoop(isLoop); this.month_pv.setIsLoop(isLoop); this.day_pv.setIsLoop(isLoop); this.hour_pv.setIsLoop(isLoop); this.minute_pv.setIsLoop(isLoop); } } /** * 设置日期控件默认选中的时间 */ public void setSelectedTime(String time) { if (canAccess) { String[] str = time.split(" "); String[] dateStr = str[0].split("-"); year_pv.setSelected(dateStr[0]); selectedCalender.set(Calendar.YEAR, Integer.parseInt(dateStr[0])); month.clear(); int selectedYear = selectedCalender.get(Calendar.YEAR); if (selectedYear == startYear) { for (int i = startMonth; i <= MAX_MONTH; i++) { month.add(formatTimeUnit(i)); } } else if (selectedYear == endYear) { for (int i = 1; i <= endMonth; i++) { month.add(formatTimeUnit(i)); } } else { for (int i = 1; i <= MAX_MONTH; i++) { month.add(formatTimeUnit(i)); } } month_pv.setData(month); month_pv.setSelected(dateStr[1]); selectedCalender.set(Calendar.MONTH, Integer.parseInt(dateStr[1]) - 1); executeAnimator(month_pv); day.clear(); int selectedMonth = selectedCalender.get(Calendar.MONTH) + 1; if (selectedYear == startYear && selectedMonth == startMonth) { for (int i = startDay; i <= selectedCalender.getActualMaximum(Calendar.DAY_OF_MONTH); i++) { day.add(formatTimeUnit(i)); } } else if (selectedYear == endYear && selectedMonth == endMonth) { for (int i = 1; i <= endDay; i++) { day.add(formatTimeUnit(i)); } } else { for (int i = 1; i <= selectedCalender.getActualMaximum(Calendar.DAY_OF_MONTH); i++) { day.add(formatTimeUnit(i)); } } day_pv.setData(day); day_pv.setSelected(dateStr[2]); selectedCalender.set(Calendar.DAY_OF_MONTH, Integer.parseInt(dateStr[2])); executeAnimator(day_pv); if (str.length == 2) { String[] timeStr = str[1].split(":"); if ((scrollUnits & SCROLL_TYPE.HOUR.value) == SCROLL_TYPE.HOUR.value) { hour.clear(); int selectedDay = selectedCalender.get(Calendar.DAY_OF_MONTH); if (selectedYear == startYear && selectedMonth == startMonth && selectedDay == startDay) { for (int i = startHour; i <= MAX_HOUR; i++) { hour.add(formatTimeUnit(i)); } } else if (selectedYear == endYear && selectedMonth == endMonth && selectedDay == endDay) { for (int i = MIN_HOUR; i <= endHour; i++) { hour.add(formatTimeUnit(i)); } } else { for (int i = MIN_HOUR; i <= MAX_HOUR; i++) { hour.add(formatTimeUnit(i)); } } hour_pv.setData(hour); hour_pv.setSelected(timeStr[0]); selectedCalender.set(Calendar.HOUR_OF_DAY, Integer.parseInt(timeStr[0])); executeAnimator(hour_pv); } if ((scrollUnits & SCROLL_TYPE.MINUTE.value) == SCROLL_TYPE.MINUTE.value) { minute.clear(); int selectedDay = selectedCalender.get(Calendar.DAY_OF_MONTH); int selectedHour = selectedCalender.get(Calendar.HOUR_OF_DAY); if (selectedYear == startYear && selectedMonth == startMonth && selectedDay == startDay && selectedHour == startHour) { for (int i = startMinute; i <= MAX_MINUTE; i++) { minute.add(formatTimeUnit(i)); } } else if (selectedYear == endYear && selectedMonth == endMonth && selectedDay == endDay && selectedHour == endHour) { for (int i = MIN_MINUTE; i <= endMinute; i++) { minute.add(formatTimeUnit(i)); } } else { for (int i = MIN_MINUTE; i <= MAX_MINUTE; i++) { minute.add(formatTimeUnit(i)); } } minute_pv.setData(minute); minute_pv.setSelected(timeStr[1]); selectedCalender.set(Calendar.MINUTE, Integer.parseInt(timeStr[1])); executeAnimator(minute_pv); } } executeScroll(); } } /** * 验证字符串是否是一个合法的日期格式 */ private boolean isValidDate(String date, String template) { boolean convertSuccess = true; // 指定日期格式 SimpleDateFormat format = new SimpleDateFormat(template, Locale.CHINA); try { // 设置lenient为false. 否则SimpleDateFormat会比较宽松地验证日期，比如2015/02/29会被接受，并转换成2015/03/01 format.setLenient(false); format.parse(date); } catch (Exception e) { // 如果throw java.text.ParseException或者NullPointerException，就说明格式不对 convertSuccess = false; } return convertSuccess; }} DatePickerView类我们自定义滑动效果:
import android.content.Context;import android.graphics.Canvas;import android.graphics.Paint;import android.graphics.Paint.Align;import android.graphics.Paint.FontMetricsInt;import android.graphics.Paint.Style;import android.os.Handler;import android.os.Message;import android.support.v4.content.ContextCompat;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.View;import java.util.ArrayList;import java.util.List;import java.util.Timer;import java.util.TimerTask;public class DatePickerView extends View { private Context context; /** * 新增字段 控制是否首尾相接循环显示 默认为循环显示 */ private boolean loop = true; /** * text之间间距和minTextSize之比 */ public static final float MARGIN_ALPHA = 2.8f; /** * 自动回滚到中间的速度 */ public static final float SPEED = 10; private List mDataList; /** * 选中的位置，这个位置是mDataList的中心位置，一直不变 */ private int mCurrentSelected; private Paint mPaint, nPaint; private float mMaxTextSize = 80; private float mMinTextSize = 40; private float mMaxTextAlpha = 255; private float mMinTextAlpha = 120; private int mViewHeight; private int mViewWidth; private float mLastDownY; /** * 滑动的距离 */ private float mMoveLen = 0; private boolean isInit = false; private boolean canScroll = true; private onSelectListener mSelectListener; private Timer timer; private MyTimerTask mTask; private Handler updateHandler = new Handler() { @Override public void handleMessage(Message msg) { if (Math.abs(mMoveLen) < SPEED) { mMoveLen = 0; if (mTask != null) { mTask.cancel(); mTask = null; performSelect(); } } else { // 这里mMoveLen / Math.abs(mMoveLen)是为了保有mMoveLen的正负号，以实现上滚或下滚 mMoveLen = mMoveLen - mMoveLen / Math.abs(mMoveLen) * SPEED; } invalidate(); } }; public DatePickerView(Context context, AttributeSet attrs) { super(context, attrs); this.context = context; init(); } public void setOnSelectListener(onSelectListener listener) { mSelectListener = listener; } private void performSelect() { if (mSelectListener != null) { mSelectListener.onSelect(mDataList.get(mCurrentSelected)); } } public void setData(List datas) { mDataList = datas; mCurrentSelected = datas.size() / 4; invalidate(); } /** * 选择选中的item的index */ public void setSelected(int selected) { mCurrentSelected = selected; if (loop) { int distance = mDataList.size() / 2 - mCurrentSelected; if (distance < 0) { for (int i = 0; i < -distance; i++) { moveHeadToTail(); mCurrentSelected--; } } else if (distance > 0) { for (int i = 0; i < distance; i++) { moveTailToHead(); mCurrentSelected++; } } } invalidate(); } /** * 选择选中的内容 */ public void setSelected(String mSelectItem) { for (int i = 0; i < mDataList.size(); i++) { if (mDataList.get(i).equals(mSelectItem)) { setSelected(i); break; } } } private void moveHeadToTail() { if (loop) { String head = mDataList.get(0); mDataList.remove(0); mDataList.add(head); } } private void moveTailToHead() { if (loop) { String tail = mDataList.get(mDataList.size() - 1); mDataList.remove(mDataList.size() - 1); mDataList.add(0, tail); } } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); mViewHeight = getMeasuredHeight(); mViewWidth = getMeasuredWidth(); // 按照View的高度计算字体大小 mMaxTextSize = mViewHeight / 7f; mMinTextSize = mMaxTextSize / 2.2f; isInit = true; invalidate(); } private void init() { timer = new Timer(); mDataList = new ArrayList<>(); //第一个paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); mPaint.setStyle(Style.FILL); mPaint.setTextAlign(Align.CENTER); mPaint.setColor(ContextCompat.getColor(context, R.color.color_59B29C)); //第二个paint nPaint = new Paint(Paint.ANTI_ALIAS_FLAG); nPaint.setStyle(Style.FILL); nPaint.setTextAlign(Align.CENTER); nPaint.setColor(ContextCompat.getColor(context, R.color.color_333333)); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); // 根据index绘制view if (isInit) { drawData(canvas); } } private void drawData(Canvas canvas) { // 先绘制选中的text再往上往下绘制其余的text float scale = parabola(mViewHeight / 4.0f, mMoveLen); float size = (mMaxTextSize - mMinTextSize) * scale + mMinTextSize; mPaint.setTextSize(size); mPaint.setAlpha((int) ((mMaxTextAlpha - mMinTextAlpha) * scale + mMinTextAlpha)); // text居中绘制，注意baseline的计算才能达到居中，y值是text中心坐标 float x = (float) (mViewWidth / 2.0); float y = (float) (mViewHeight / 2.0 + mMoveLen); FontMetricsInt fmi = mPaint.getFontMetricsInt(); float baseline = (float) (y - (fmi.bottom / 2.0 + fmi.top / 2.0)); canvas.drawText(mDataList.get(mCurrentSelected), x, baseline, mPaint); // 绘制上方data for (int i = 1; (mCurrentSelected - i) >= 0; i++) { drawOtherText(canvas, i, -1); } // 绘制下方data for (int i = 1; (mCurrentSelected + i) < mDataList.size(); i++) { drawOtherText(canvas, i, 1); } } /** * @param position 距离mCurrentSelected的差值 * @param type 1表示向下绘制，-1表示向上绘制 */ private void drawOtherText(Canvas canvas, int position, int type) { float d = MARGIN_ALPHA * mMinTextSize * position + type * mMoveLen; float scale = parabola(mViewHeight / 4.0f, d); float size = (mMaxTextSize - mMinTextSize) * scale + mMinTextSize; nPaint.setTextSize(size); nPaint.setAlpha((int) ((mMaxTextAlpha - mMinTextAlpha) * scale + mMinTextAlpha)); float y = (float) (mViewHeight / 2.0 + type * d); FontMetricsInt fmi = nPaint.getFontMetricsInt(); float baseline = (float) (y - (fmi.bottom / 2.0 + fmi.top / 2.0)); canvas.drawText(mDataList.get(mCurrentSelected + type * position), (float) (mViewWidth / 2.0), baseline, nPaint); } /** * 抛物线 * * @param zero 零点坐标 * @param x 偏移量 */ private float parabola(float zero, float x) { float f = (float) (1 - Math.pow(x / zero, 2)); return f < 0 ? 0 : f; } @Override public boolean onTouchEvent(MotionEvent event) { switch (event.getActionMasked()) { case MotionEvent.ACTION_DOWN: doDown(event); break; case MotionEvent.ACTION_MOVE: mMoveLen += (event.getY() - mLastDownY); if (mMoveLen > MARGIN_ALPHA * mMinTextSize / 2) { if (!loop && mCurrentSelected == 0) { mLastDownY = event.getY(); invalidate(); return true; } if (!loop) { mCurrentSelected--; } // 往下滑超过离开距离 moveTailToHead(); mMoveLen = mMoveLen - MARGIN_ALPHA * mMinTextSize; } else if (mMoveLen < -MARGIN_ALPHA * mMinTextSize / 2) { if (mCurrentSelected == mDataList.size() - 1) { mLastDownY = event.getY(); invalidate(); return true; } if (!loop) { mCurrentSelected++; } // 往上滑超过离开距离 moveHeadToTail(); mMoveLen = mMoveLen + MARGIN_ALPHA * mMinTextSize; } mLastDownY = event.getY(); invalidate(); break; case MotionEvent.ACTION_UP: doUp(); break; } return true; } private void doDown(MotionEvent event) { if (mTask != null) { mTask.cancel(); mTask = null; } mLastDownY = event.getY(); } private void doUp() { // 抬起手后mCurrentSelected的位置由当前位置move到中间选中位置 if (Math.abs(mMoveLen) < 0.0001) { mMoveLen = 0; return; } if (mTask != null) { mTask.cancel(); mTask = null; } mTask = new MyTimerTask(updateHandler); timer.schedule(mTask, 0, 10); } class MyTimerTask extends TimerTask { Handler handler; public MyTimerTask(Handler handler) { this.handler = handler; } @Override public void run() { handler.sendMessage(handler.obtainMessage()); } } public interface onSelectListener { void onSelect(String text); } public void setCanScroll(boolean canScroll) { this.canScroll = canScroll; } @Override public boolean dispatchTouchEvent(MotionEvent event) { return canScroll && super.dispatchTouchEvent(event); } /** * 控制内容是否首尾相连 */ public void setIsLoop(boolean isLoop) { loop = isLoop; }} 最后我们看下调用方法MainActivity类:
import android.app.Activity;import android.os.Bundle;import android.text.TextUtils;import android.util.Log;import android.view.View;import android.widget.TextView;import java.text.SimpleDateFormat;import java.util.Date;import java.util.Locale;public class MainActivity extends Activity implements View.OnClickListener{ private CustomDatePicker customDatePicker; private String now; private TextView tv; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); tv = findViewById(R.id.tv); findViewById(R.id.bt).setOnClickListener(this); DatePicker(); } /** * 显示时间 */ private void DatePicker() { SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm", Locale.CHINA); //获取当前时间 now = sdf.format(new Date()); //tvElectricalTime.setText(now.split(" ")[0]); customDatePicker = new CustomDatePicker(this, new CustomDatePicker.ResultHandler() { @Override public void handle(String time) { // 回调接口，获得选中的时间 Log.d("yyyyy", time); tv.setText(time); } }, "1990-01-01 00:00", now); // 初始化日期格式请用：yyyy-MM-dd HH:mm，否则不能正常运行 customDatePicker.showSpecificTime(true); // 不显示时和分 customDatePicker.setIsLoop(false); // 不允许循环滚动 } @Override public void onClick(View view) { if (TextUtils.isEmpty(tv.getText().toString().trim())) customDatePicker.show(now); else // 日期格式为yyyy-MM-dd customDatePicker.show(tv.getText().toString()); }}这里不用过多的解释了
弹窗样式布局custom_date_picker.xml
<?xml version="1.0" encoding="utf-8"?> activity_main.xml类就没有什么东西了,但我还是给大家贴出来吧:
<?xml version="1.0" encoding="utf-8"?> 这就是主要代码了,还有一些辅助文件我就不贴出来了,希望能帮助到大家.
点我有惊喜哦
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