android 时间滚动控件底部弹出

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先上个效果图

android 时间滚动控件底部弹出_第1张图片

第一步：先自定义一个View

package com.wheel.widget;import java.util.LinkedList;import java.util.List;import java.util.logging.Level;import java.util.logging.Logger;import com.example.mywheel.R;import android.content.Context;import android.graphics.Canvas;import android.graphics.Paint;import android.graphics.Rect;import android.graphics.drawable.Drawable;import android.graphics.drawable.GradientDrawable;import android.graphics.drawable.GradientDrawable.Orientation;import android.os.Handler;import android.os.Message;import android.text.Layout;import android.text.StaticLayout;import android.text.TextPaint;import android.util.AttributeSet;import android.util.DisplayMetrics;import android.util.FloatMath;import android.view.GestureDetector;import android.view.GestureDetector.SimpleOnGestureListener;import android.view.MotionEvent;import android.view.View;import android.view.animation.Interpolator;import android.widget.Scroller;public class WheelView extends View {/** Scrolling duration */private static final int SCROLLING_DURATION = 400;/** Minimum delta for scrolling */private static final int MIN_DELTA_FOR_SCROLLING = 1;/** Current value & label text color */public static int VALUE_TEXT_COLOR = 0xe0000000;/** Items text color */private static final int ITEMS_TEXT_COLOR = 0xe0000000;/** Top and bottom shadows colors */private static final int[] SHADOWS_COLORS = new int[] { 0x00000000,0x00000000, 0x00000000 };/** Additional items height (is added to standard text item height) */private static final int ADDITIONAL_ITEM_HEIGHT = 15;/** Text size */private static final int TEXT_SIZE = 15;/** Top and bottom items offset (to hide that) */private static final int ITEM_OFFSET = TEXT_SIZE / 5;/** Additional width for items layout */private static final int ADDITIONAL_ITEMS_SPACE = 10;/** Label offset */private static final int LABEL_OFFSET = 8;/** Left and right padding value */private static final int PADDING = 5;/** Default count of visible items */private static final int DEF_VISIBLE_ITEMS = 5;// Wheel Valuesprivate WheelAdapter adapter = null;private int currentItem = 0;// Widthsprivate int itemsWidth = 0;private int labelWidth = 0;// Count of visible itemsprivate int visibleItems = DEF_VISIBLE_ITEMS;// Item heightprivate int itemHeight = 0;// Text paintsprivate TextPaint itemsPaint;private TextPaint valuePaint;// Layoutsprivate StaticLayout itemsLayout;private StaticLayout labelLayout;private StaticLayout valueLayout;// Label & backgroundprivate String label;private Drawable centerDrawable;// Shadows drawablesprivate GradientDrawable topShadow;private GradientDrawable bottomShadow;// Scrollingprivate boolean isScrollingPerformed; private int scrollingOffset;// Scrolling animationprivate GestureDetector gestureDetector;private Scroller scroller;private int lastScrollY;// Cyclicboolean isCyclic = true;// Listenersprivate List changingListeners = new LinkedList();private List scrollingListeners = new LinkedList();/** * Constructor */public WheelView(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);initData(context);}/** * Constructor */public WheelView(Context context, AttributeSet attrs) {super(context, attrs);initData(context);}/** * Constructor */public WheelView(Context context) {super(context);initData(context);}/** * Initializes class data * @param context the context */private void initData(Context context) {gestureDetector = new GestureDetector(context, gestureListener);gestureDetector.setIsLongpressEnabled(false);scroller = new Scroller(context);}/** * Gets wheel adapter * @return the adapter */public WheelAdapter getAdapter() {return adapter;}/** * Sets wheel adapter * @param adapter the new wheel adapter */public void setAdapter(WheelAdapter adapter) {this.adapter = adapter;invalidateLayouts();invalidate();}/** * Set the the specified scrolling interpolator * @param interpolator the interpolator */public void setInterpolator(Interpolator interpolator) {scroller.forceFinished(true);scroller = new Scroller(getContext(), interpolator);}/** * Gets count of visible items *  * @return the count of visible items */public int getVisibleItems() {return visibleItems;}/** * Sets count of visible items *  * @param count *            the new count */public void setVisibleItems(int count) {visibleItems = count;invalidate();}/** * Gets label *  * @return the label */public String getLabel() {return label;}/** * Sets label *  * @param newLabel *            the label to set */public void setLabel(String newLabel) {if (label == null || !label.equals(newLabel)) {label = newLabel;labelLayout = null;invalidate();}}/** * Adds wheel changing listener * @param listener the listener  */public void addChangingListener(OnWheelChangedListener listener) {changingListeners.add(listener);}/** * Removes wheel changing listener * @param listener the listener */public void removeChangingListener(OnWheelChangedListener listener) {changingListeners.remove(listener);}/** * Notifies changing listeners * @param oldValue the old wheel value * @param newValue the new wheel value */protected void notifyChangingListeners(int oldValue, int newValue) {for (OnWheelChangedListener listener : changingListeners) {listener.onChanged(this, oldValue, newValue);}}/** * Adds wheel scrolling listener * @param listener the listener  */public void addScrollingListener(OnWheelScrollListener listener) {scrollingListeners.add(listener);}/** * Removes wheel scrolling listener * @param listener the listener */public void removeScrollingListener(OnWheelScrollListener listener) {scrollingListeners.remove(listener);}/** * Notifies listeners about starting scrolling */protected void notifyScrollingListenersAboutStart() {for (OnWheelScrollListener listener : scrollingListeners) {listener.onScrollingStarted(this);}}/** * Notifies listeners about ending scrolling */protected void notifyScrollingListenersAboutEnd() {for (OnWheelScrollListener listener : scrollingListeners) {listener.onScrollingFinished(this);}}/** * Gets current value *  * @return the current value */public int getCurrentItem() {return currentItem;}/** * Sets the current item. Does nothing when index is wrong. *  * @param index the item index * @param animated the animation flag */public void setCurrentItem(int index, boolean animated) {if (adapter == null || adapter.getItemsCount() == 0) {return; // throw?}if (index < 0 || index >= adapter.getItemsCount()) {if (isCyclic) {while (index < 0) {index += adapter.getItemsCount();}index %= adapter.getItemsCount();} else{return; // throw?}}if (index != currentItem) {if (animated) {scroll(index - currentItem, SCROLLING_DURATION);} else {invalidateLayouts();int old = currentItem;currentItem = index;notifyChangingListeners(old, currentItem);invalidate();}}}/** * Sets the current item w/o animation. Does nothing when index is wrong. *  * @param index the item index */public void setCurrentItem(int index) {setCurrentItem(index, false);}/** * Tests if wheel is cyclic. That means before the 1st item there is shown the last one * @return true if wheel is cyclic */public boolean isCyclic() {return isCyclic;}/** * Set wheel cyclic flag * @param isCyclic the flag to set */public void setCyclic(boolean isCyclic) {this.isCyclic = isCyclic;invalidate();invalidateLayouts();}/** * Invalidates layouts */private void invalidateLayouts() {itemsLayout = null;valueLayout = null;scrollingOffset = 0;}/** * Initializes resources */private void initResourcesIfNecessary() {DisplayMetrics dm = this.getResources().getDisplayMetrics();int textsize = (int) (TEXT_SIZE* dm.density);if (itemsPaint == null) {itemsPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG| Paint.FAKE_BOLD_TEXT_FLAG);itemsPaint.density = getResources().getDisplayMetrics().density;itemsPaint.setTextSize(textsize);}if (valuePaint == null) {valuePaint = new TextPaint(Paint.ANTI_ALIAS_FLAG| Paint.FAKE_BOLD_TEXT_FLAG | Paint.DITHER_FLAG);//valuePaint.density = getResources().getDisplayMetrics().density;valuePaint.setTextSize(textsize);valuePaint.setShadowLayer(0.1f, 0, 0.1f, 0xFFC0C0C0);}if (centerDrawable == null) {centerDrawable = getContext().getResources().getDrawable(R.drawable.wheel_val);}if (topShadow == null) {topShadow = new GradientDrawable(Orientation.TOP_BOTTOM, SHADOWS_COLORS);}if (bottomShadow == null) {bottomShadow = new GradientDrawable(Orientation.BOTTOM_TOP, SHADOWS_COLORS);}setBackgroundResource(R.drawable.wheel_bg);}/** * Calculates desired height for layout *  * @param layout *            the source layout * @return the desired layout height */private int getDesiredHeight(Layout layout) {if (layout == null) {return 0;}DisplayMetrics dm = this.getResources().getDisplayMetrics();int height = (int) (ADDITIONAL_ITEM_HEIGHT* dm.density);int desired = getItemHeight() * visibleItems - ITEM_OFFSET * 2- height;// Check against our minimum heightdesired = Math.max(desired, getSuggestedMinimumHeight());return desired;}/** * Returns text item by index * @param index the item index * @return the item or null */private String getTextItem(int index) {if (adapter == null || adapter.getItemsCount() == 0) {return null;}int count = adapter.getItemsCount();if ((index < 0 || index >= count) && !isCyclic) {return null;} else {while (index < 0) {index = count + index;}}index %= count;return adapter.getItem(index);}/** * Builds text depending on current value *  * @param useCurrentValue * @return the text */private String buildText(boolean useCurrentValue) {StringBuilder itemsText = new StringBuilder();int addItems = visibleItems / 2 + 1;for (int i = currentItem - addItems; i <= currentItem + addItems; i++) {if (useCurrentValue || i != currentItem) {String text = getTextItem(i);if (text != null) {itemsText.append(text);}}if (i < currentItem + addItems) {itemsText.append("\n");}}return itemsText.toString();}/** * Returns the max item length that can be present * @return the max length */private int getMaxTextLength() {WheelAdapter adapter = getAdapter();if (adapter == null) {return 0;}int adapterLength = adapter.getMaximumLength();if (adapterLength > 0) {return adapterLength;}String maxText = null;int addItems = visibleItems / 2;for (int i = Math.max(currentItem - addItems, 0);i < Math.min(currentItem + visibleItems, adapter.getItemsCount()); i++) {String text = adapter.getItem(i);if (text != null && (maxText == null || maxText.length() < text.length())) {maxText = text;}}return maxText != null ? maxText.length() : 0;}/** * Returns height of wheel item * @return the item height */private int getItemHeight() {if (itemHeight != 0) {return itemHeight;} else if (itemsLayout != null && itemsLayout.getLineCount() > 2) {itemHeight = itemsLayout.getLineTop(2) - itemsLayout.getLineTop(1);return itemHeight;}return getHeight() / visibleItems;}/** * Calculates control width and creates text layouts * @param widthSize the input layout width * @param mode the layout mode * @return the calculated control width */private int calculateLayoutWidth(int widthSize, int mode) {initResourcesIfNecessary();int width = widthSize;int maxLength = getMaxTextLength();if (maxLength > 0) {float textWidth = FloatMath.ceil(Layout.getDesiredWidth("0", itemsPaint));itemsWidth = (int) (maxLength * textWidth);} else {itemsWidth = 0;}itemsWidth += ADDITIONAL_ITEMS_SPACE; // make it some morelabelWidth = 0;if (label != null && label.length() > 0) {labelWidth = (int) FloatMath.ceil(Layout.getDesiredWidth(label, valuePaint));}boolean recalculate = false;if (mode == MeasureSpec.EXACTLY) {width = widthSize;recalculate = true;} else {width = itemsWidth + labelWidth + 2 * PADDING;if (labelWidth > 0) {width += LABEL_OFFSET;}// Check against our minimum widthwidth = Math.max(width, getSuggestedMinimumWidth());if (mode == MeasureSpec.AT_MOST && widthSize < width) {width = widthSize;recalculate = true;}}if (recalculate) {// recalculate widthint pureWidth = width - LABEL_OFFSET - 2 * PADDING;if (pureWidth <= 0) {itemsWidth = labelWidth = 0;}if (labelWidth > 0) {double newWidthItems = (double) itemsWidth * pureWidth/ (itemsWidth + labelWidth);itemsWidth = (int) newWidthItems;labelWidth = pureWidth - itemsWidth;} else {itemsWidth = pureWidth + LABEL_OFFSET; // no label}}if (itemsWidth > 0) {createLayouts(itemsWidth, labelWidth);}return width;}/** * Creates layouts * @param widthItems width of items layout * @param widthLabel width of label layout */private void createLayouts(int widthItems, int widthLabel) {DisplayMetrics dm = this.getResources().getDisplayMetrics();int height = (int) (ADDITIONAL_ITEM_HEIGHT* dm.density);if (itemsLayout == null || itemsLayout.getWidth() > widthItems) {itemsLayout = new StaticLayout(buildText(isScrollingPerformed), itemsPaint, widthItems,widthLabel > 0 ? Layout.Alignment.ALIGN_OPPOSITE : Layout.Alignment.ALIGN_CENTER,1, height, false);} else {itemsLayout.increaseWidthTo(widthItems);}if (!isScrollingPerformed && (valueLayout == null || valueLayout.getWidth() > widthItems)) {String text = getAdapter() != null ? getAdapter().getItem(currentItem) : null;valueLayout = new StaticLayout(text != null ? text : "",valuePaint, widthItems, widthLabel > 0 ?Layout.Alignment.ALIGN_OPPOSITE : Layout.Alignment.ALIGN_CENTER,1, height, false);} else if (isScrollingPerformed) {valueLayout = null;} else {valueLayout.increaseWidthTo(widthItems);}if (widthLabel > 0) {if (labelLayout == null || labelLayout.getWidth() > widthLabel) {labelLayout = new StaticLayout(label, valuePaint,widthLabel, Layout.Alignment.ALIGN_NORMAL, 1,height, false);} else {labelLayout.increaseWidthTo(widthLabel);}}}@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {int widthMode = MeasureSpec.getMode(widthMeasureSpec);int heightMode = MeasureSpec.getMode(heightMeasureSpec);int widthSize = MeasureSpec.getSize(widthMeasureSpec);int heightSize = MeasureSpec.getSize(heightMeasureSpec);int width = calculateLayoutWidth(widthSize, widthMode);int height;if (heightMode == MeasureSpec.EXACTLY) {height = heightSize;} else {height = getDesiredHeight(itemsLayout);if (heightMode == MeasureSpec.AT_MOST) {height = Math.min(height, heightSize);}}setMeasuredDimension(width, height);}@Overrideprotected void onDraw(Canvas canvas) {super.onDraw(canvas);if (itemsLayout == null) {if (itemsWidth == 0) {calculateLayoutWidth(getWidth(), MeasureSpec.EXACTLY);} else {createLayouts(itemsWidth, labelWidth);}}if (itemsWidth > 0) {canvas.save();// Skip padding space and hide a part of top and bottom itemscanvas.translate(PADDING, -ITEM_OFFSET);drawItems(canvas);drawValue(canvas);canvas.restore();}drawCenterRect(canvas);drawShadows(canvas);}/** * Draws shadows on top and bottom of control * @param canvas the canvas for drawing */private void drawShadows(Canvas canvas) {topShadow.setBounds(0, 0, getWidth(), getHeight() / visibleItems);topShadow.draw(canvas);bottomShadow.setBounds(0, getHeight() - getHeight() / visibleItems,getWidth(), getHeight());bottomShadow.draw(canvas);}/** * Draws value and label layout * @param canvas the canvas for drawing */private void drawValue(Canvas canvas) {valuePaint.setColor(VALUE_TEXT_COLOR);valuePaint.drawableState = getDrawableState();Rect bounds = new Rect();itemsLayout.getLineBounds(visibleItems / 2, bounds);// draw labelif (labelLayout != null) {canvas.save();canvas.translate(itemsLayout.getWidth() + LABEL_OFFSET, bounds.top);labelLayout.draw(canvas);canvas.restore();}// draw current valueif (valueLayout != null) {canvas.save();canvas.translate(0, bounds.top + scrollingOffset);valueLayout.draw(canvas);canvas.restore();}}/** * Draws items * @param canvas the canvas for drawing */private void drawItems(Canvas canvas) {canvas.save();int top = itemsLayout.getLineTop(1);canvas.translate(0, - top + scrollingOffset);Logger.getLogger(WheelView.class.getName()).log(Level.WARNING, ".....top....>>"+top);Logger.getLogger(WheelView.class.getName()).log(Level.WARNING, "....scrollingOffset...>>"+scrollingOffset);itemsPaint.setColor(ITEMS_TEXT_COLOR);itemsPaint.drawableState = getDrawableState();itemsLayout.draw(canvas);canvas.restore();}/** * Draws rect for current value * @param canvas the canvas for drawing */private void drawCenterRect(Canvas canvas) {int center = getHeight() / 2;int offset = getItemHeight() / 2;centerDrawable.setBounds(0, center - offset, getWidth(), center + offset);centerDrawable.draw(canvas);}@Overridepublic boolean onTouchEvent(MotionEvent event) {WheelAdapter adapter = getAdapter();if (adapter == null) {return true;}if (!gestureDetector.onTouchEvent(event) && event.getAction() == MotionEvent.ACTION_UP) {justify();}return true;}/** * Scrolls the wheel * @param delta the scrolling value */private void doScroll(int delta) {scrollingOffset += delta;int count = scrollingOffset / getItemHeight();int pos = currentItem - count;if (isCyclic && adapter.getItemsCount() > 0) {// fix position by rotatingwhile (pos < 0) {pos += adapter.getItemsCount();}pos %= adapter.getItemsCount();} else if (isScrollingPerformed) {// if (pos < 0) {count = currentItem;pos = 0;} else if (pos >= adapter.getItemsCount()) {count = currentItem - adapter.getItemsCount() + 1;pos = adapter.getItemsCount() - 1;}} else {// fix positionpos = Math.max(pos, 0);pos = Math.min(pos, adapter.getItemsCount() - 1);}int offset = scrollingOffset;if (pos != currentItem) {setCurrentItem(pos, false);} else {invalidate();}// update offsetscrollingOffset = offset - count * getItemHeight();if (scrollingOffset > getHeight()) {scrollingOffset = scrollingOffset % getHeight() + getHeight();}}// gesture listenerprivate SimpleOnGestureListener gestureListener = new SimpleOnGestureListener() {public boolean onDown(MotionEvent e) {if (isScrollingPerformed) {scroller.forceFinished(true);clearMessages();return true;}return false;}public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {startScrolling();doScroll((int)-distanceY);return true;}public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {lastScrollY = currentItem * getItemHeight() + scrollingOffset;int maxY = isCyclic ? 0x7FFFFFFF : adapter.getItemsCount() * getItemHeight();int minY = isCyclic ? -maxY : 0;scroller.fling(0, lastScrollY, 0, (int) -velocityY / 2, 0, 0, minY, maxY);setNextMessage(MESSAGE_SCROLL);return true;}};// Messagesprivate final int MESSAGE_SCROLL = 0;private final int MESSAGE_JUSTIFY = 1;/** * Set next message to queue. Clears queue before. *  * @param message the message to set */private void setNextMessage(int message) {clearMessages();animationHandler.sendEmptyMessage(message);}/** * Clears messages from queue */private void clearMessages() {animationHandler.removeMessages(MESSAGE_SCROLL);animationHandler.removeMessages(MESSAGE_JUSTIFY);}// animation handlerprivate Handler animationHandler = new Handler() {public void handleMessage(Message msg) {scroller.computeScrollOffset();int currY = scroller.getCurrY();int delta = lastScrollY - currY;lastScrollY = currY;if (delta != 0) {doScroll(delta);}// scrolling is not finished when it comes to final Y// so, finish it manually if (Math.abs(currY - scroller.getFinalY()) < MIN_DELTA_FOR_SCROLLING) {currY = scroller.getFinalY();scroller.forceFinished(true);}if (!scroller.isFinished()) {animationHandler.sendEmptyMessage(msg.what);} else if (msg.what == MESSAGE_SCROLL) {justify();} else {finishScrolling();}}};/** * Justifies wheel */private void justify() {if (adapter == null) {return;}lastScrollY = 0;int offset = scrollingOffset;int itemHeight = getItemHeight();boolean needToIncrease = offset > 0 ? currentItem < adapter.getItemsCount() : currentItem > 0; if ((isCyclic || needToIncrease) && Math.abs((float) offset) > (float) itemHeight / 2) {if (offset < 0)offset += itemHeight + MIN_DELTA_FOR_SCROLLING;elseoffset -= itemHeight + MIN_DELTA_FOR_SCROLLING;}if (Math.abs(offset) > MIN_DELTA_FOR_SCROLLING) {scroller.startScroll(0, 0, 0, offset, SCROLLING_DURATION);setNextMessage(MESSAGE_JUSTIFY);} else {finishScrolling();}}/** * Starts scrolling */private void startScrolling() {if (!isScrollingPerformed) {isScrollingPerformed = true;notifyScrollingListenersAboutStart();}}/** * Finishes scrolling */void finishScrolling() {if (isScrollingPerformed) {notifyScrollingListenersAboutEnd();isScrollingPerformed = false;}invalidateLayouts();invalidate();}/** * Scroll the wheel * @param itemsToSkip items to scroll * @param time scrolling duration */public void scroll(int itemsToScroll, int time) {scroller.forceFinished(true);lastScrollY = scrollingOffset;int offset = itemsToScroll * getItemHeight();scroller.startScroll(0, lastScrollY, 0, offset - lastScrollY, time);setNextMessage(MESSAGE_SCROLL);startScrolling();}public int getScroolingOffset(){return scrollingOffset;}}

里面可以修改字体大小颜色间距等等

第二步，创建一个适配器

package com.wheel.widget;/** * Numeric Wheel adapter. */public class NumericWheelAdapter implements WheelAdapter {/** The default min value */public static final int DEFAULT_MAX_VALUE = 9;/** The default max value */private static final int DEFAULT_MIN_VALUE = 0;// Valuesprivate int minValue;private int maxValue;// Valuesprivate double minValue1;private double maxValue1;// formatprivate String format;private String values = null;private String data[] = new String[215];/** * Constructor *  * @param minValue *            the wheel min value * @param maxValue *            the wheel max value */public NumericWheelAdapter(int minValue, int maxValue) {this.minValue = minValue;this.maxValue = maxValue;}/** * Constructor *  * @param minValue *            the wheel min value * @param maxValue *            the wheel max value * @param format *            the format string */public NumericWheelAdapter(int minValue, int maxValue, String format) {this.minValue = minValue;this.maxValue = maxValue;this.format = format;}public String getItem(int index) {if (index >= 0 && index < getItemsCount()) {int value = minValue + index;values = (format != null ? String.format(format, value) : Integer.toString(value));setValue(values);return values;}return null;}// 杩斿洖褰撳墠閫変腑鐨勫?public String getValues() {return values;}public void setValue(String value) {this.values = value;}public int getItemsCount() {return maxValue - minValue + 1;}// 得到最大项目长度。它是用来确定轮宽度。// 如果返回1,将使用默认轮宽度public int getMaximumLength() {int max = Math.max(Math.abs(maxValue), Math.abs(minValue));int maxLen = Integer.toString(max).length();if (minValue < 0) {maxLen++;}return maxValue - minValue + 1;}}

第三步：布局文件

<?xml version="1.0" encoding="utf-8"?>

第四步：自定义一个dialog

package com.wheel.view;import java.util.Arrays;import java.util.Calendar;import java.util.List;import android.app.Dialog;import android.content.Context;import android.os.Bundle;import android.util.Log;import android.view.View;import android.view.Window;import android.widget.Button;import android.widget.LinearLayout;import android.widget.LinearLayout.LayoutParams;import android.widget.TextView;import com.example.mywheel.R;import com.wheel.widget.NumericWheelAdapter;import com.wheel.widget.OnWheelChangedListener;import com.wheel.widget.WheelView;/** * 日期选择�? *  * @author Administrator *  */public class BirthDateDialog extends Dialog implementsandroid.view.View.OnClickListener {/** * 自定义Dialog监听�? */public interface PriorityListener {/** * 回调函数，用于在Dialog的监听事件触发后刷新Activity的UI显示 */public void refreshPriorityUI(String year, String month, String day,String hours, String mins);}private PriorityListener lis;private boolean scrolling = false;private Context context = null;public Button softInfo = null;public Button softInfoButton = null;private NumericWheelAdapter year_adapter = null;private NumericWheelAdapter month_adapter = null;private NumericWheelAdapter day_adapter = null;private NumericWheelAdapter hours_adapter = null;private NumericWheelAdapter mins_adapter = null;private NumericWheelAdapter seconds_adapter = null;private Button btn_sure = null;private Button btn_cancel = null;private int curYear = 0;private int curMonth = 0;private int curDay = 0;private int hours = 0;private int mins = 0;private int seconds = 0;private WheelView monthview = null;private WheelView yearview = null;private WheelView dayview = null;private WheelView hoursview = null;private WheelView minsview = null;private WheelView secondsview = null;private static int theme = R.style.myDialog;// 主题private LinearLayout date_layout;private int width, height;// 对话框宽高private TextView title_tv;private String title;public BirthDateDialog(final Context context,final PriorityListener listener, int currentyear, int currentmonth,int currentday, int hours, int mins, int seconds, int width,int height, String title) {super(context, theme);this.context = context;lis = listener;this.curYear = currentyear;this.curMonth = currentmonth;this.curDay = currentday;this.width = width;this.title = title;this.hours = hours;this.mins = mins;this.height = height;this.seconds = seconds;}@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(R.layout.date_select_wheel);btn_sure = (Button) findViewById(R.id.confirm_btn);btn_sure.setOnClickListener(this);btn_cancel = (Button) findViewById(R.id.cancel_btn);btn_cancel.setOnClickListener(this);date_layout = (LinearLayout) findViewById(R.id.date_selelct_layout);LayoutParams lparams_hours = new LayoutParams(width, height / 3 + 10);date_layout.setLayoutParams(lparams_hours);title_tv = (TextView) findViewById(R.id.diaolog_title_tv);title_tv.setText(title);yearview = (WheelView) findViewById(R.id.year);monthview = (WheelView) findViewById(R.id.month);dayview = (WheelView) findViewById(R.id.day);hoursview = (WheelView) findViewById(R.id.hours);minsview = (WheelView) findViewById(R.id.mins);secondsview = (WheelView) findViewById(R.id.seconds);OnWheelChangedListener listener = new OnWheelChangedListener() {public void onChanged(WheelView wheel, int oldValue, int newValue) {if (!scrolling) {updateDays(yearview, monthview, dayview);}}};monthview.addChangingListener(listener);yearview.addChangingListener(listener);Calendar calendar = Calendar.getInstance();if (this.curYear == 0 || this.curMonth == 0) {curYear = calendar.get(Calendar.YEAR);curMonth = calendar.get(Calendar.MONTH) + 1;curDay = calendar.get(Calendar.DAY_OF_MONTH);}// 初始化数�?�?year_adapter = new NumericWheelAdapter(1900, 2100);yearview.setAdapter(year_adapter);int cc = curYear - 1900;// 按下标来�?yearview.setCurrentItem(cc);// 传�?过去的是下标yearview.setVisibleItems(5);month_adapter = new NumericWheelAdapter(1, 12, "%02d");monthview.setAdapter(month_adapter);monthview.setCurrentItem(curMonth - 1);monthview.setCyclic(false);monthview.setVisibleItems(5);updateDays(yearview, monthview, dayview);dayview.setCyclic(false);dayview.setVisibleItems(5);hours_adapter = new NumericWheelAdapter(0, 23, "%02d");hoursview.setAdapter(hours_adapter);hoursview.setCurrentItem(hours);hoursview.setCyclic(false);hoursview.setVisibleItems(5);mins_adapter = new NumericWheelAdapter(0, 59, "%02d");minsview.setAdapter(mins_adapter);minsview.setCurrentItem(mins);minsview.setCyclic(false);minsview.setVisibleItems(5);seconds_adapter = new NumericWheelAdapter(0, 59, "%02d");secondsview.setAdapter(seconds_adapter);secondsview.setCurrentItem(seconds);secondsview.setCyclic(false);secondsview.setVisibleItems(5);}/** * 根据年份和月份来更新日期 */private void updateDays(WheelView year, WheelView month, WheelView day) {// 添加大小月月份并将其转换为list,方便之后的判�?String[] months_big = { "1", "3", "5", "7", "8", "10", "12" };String[] months_little = { "4", "6", "9", "11" };final List list_big = Arrays.asList(months_big);final List list_little = Arrays.asList(months_little);int year_num = year.getCurrentItem() + 1900;// 判断大小月及是否闰年,用来确定"�?的数�?if (list_big.contains(String.valueOf(month.getCurrentItem() + 1))) {day_adapter = new NumericWheelAdapter(1, 31, "%02d");} else if (list_little.contains(String.valueOf(month.getCurrentItem() + 1))) {day_adapter = new NumericWheelAdapter(1, 30, "%02d");} else {if ((year_num % 4 == 0 && year_num % 100 != 0)|| year_num % 400 == 0)day_adapter = new NumericWheelAdapter(1, 29, "%02d");elseday_adapter = new NumericWheelAdapter(1, 28, "%02d");}dayview.setAdapter(day_adapter);dayview.setCurrentItem(curDay - 1);}public BirthDateDialog(Context context, PriorityListener listener) {super(context, theme);this.context = context;}public BirthDateDialog(Context context, String birthDate) {super(context, theme);this.context = context;}@Overridepublic void onClick(View v) {switch (v.getId()) {case R.id.confirm_btn:lis.refreshPriorityUI(year_adapter.getValues(),month_adapter.getValues(), day_adapter.getValues(),hours_adapter.getValues(), mins_adapter.getValues());this.dismiss();break;case R.id.cancel_btn:this.dismiss();break;default:break;}}@Overridepublic void dismiss() {super.dismiss();}@Overrideprotected void onStop() {super.onStop();}}

第五步：dialog样式在底部

// 时间public void getDate() {DisplayMetrics dm = new DisplayMetrics();this.getWindowManager().getDefaultDisplay().getMetrics(dm);int width = dm.widthPixels;int height = dm.heightPixels;String curDate = date_tv.getText().toString();int[] date = getYMDArray(curDate, "-");int[] time = getYMDArray(time_tv.getText().toString(), ":");BirthDateDialog birthDiolog = new BirthDateDialog(this,new PriorityListener() {@Overridepublic void refreshPriorityUI(String year, String month,String day, String hours, String mins) {date_tv.setText(year + "-" + month + "-" + day);time_tv.setText(hours + ":" + mins);}}, date[0], date[1], date[2], time[0], time[1], time[2], width,height, "测量时间");Window window = birthDiolog.getWindow();window.setGravity(Gravity.BOTTOM); // 此处可以设置dialog显示的位置window.setWindowAnimations(R.style.dialogstyle); // 添加动画birthDiolog.setCancelable(true);birthDiolog.show();}

以上就是关键代码，待会会把整个项目贴上来有不足之处请多多谅解

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