自制日期选择器（datepicker）
在网上看过很多关于datepicker的列子，效果就是我想要的，但界面却和我的项目不同，因此在网上的例子上做做手脚，改变下外观，先说下改动的地方，再将代码放上去。
1、主要改动关键是在WheelView类：protected void onDraw(Canvas canvas)方法中，drawCenterRect(canvas)的位置放置
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (itemsLayout == null) {
if (itemsWidth == 0) {
calculateLayoutWidth(getWidth(), MeasureSpec.EXACTLY);
} else {
createLayouts(itemsWidth, labelWidth);
}
}
drawCenterRect(canvas); // 放在此处，字在背景色上
if (itemsWidth > 0) {
canvas.save();
// Skip padding space and hide a part of top and bottom items
canvas.translate(PADDING, -ITEM_OFFSET);
drawItems(canvas);
drawValue(canvas);
canvas.restore();
}
// drawCenterRect(canvas);// 放在此处，字在背景色下
drawShadows(canvas);
}
2、在wheel_val.xml文件中设置选中项背景色
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<gradient
android:startColor="#FF00b5ef" // 选中项的上部分
android:centerColor="#FF00b5ef" // 选中项的中间部分
android:endColor="#FF00b5ef" // 选中项的下部分
android:angle="90" />
<stroke android:width="1dp" android:color="#FFFFFFFF" /> // 年月日间的间隔颜色以及宽度
</shape>
现在看下效果图：
下面公布下代码：
NumericWheelAdapter类：
/*
* Copyright 2010 Yuri Kanivets
*
* 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 com.lakala.pay.easycashregisterphone2.view.datepicker;
/**
* 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;
// Values
private int minValue;
private int maxValue;
// format
private String format;
/**
* Default constructor
*/
public NumericWheelAdapter() {
this(DEFAULT_MIN_VALUE, DEFAULT_MAX_VALUE);
}
/**
* Constructor
* @param minValue the wheel min value
* @param maxValue the wheel max value
*/
public NumericWheelAdapter(int minValue, int maxValue) {
this(minValue, maxValue, null);
}
/**
* 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;
return format != null ? String.format(format, value) : Integer.toString(value);
}
return null;
}
public int getItemsCount() {
return maxValue - minValue + 1;
}
public int getMaximumLength() {
int max = Math.max(Math.abs(maxValue), Math.abs(minValue));
int maxLen = Integer.toString(max).length();
if (minValue < 0) {
maxLen++;
}
return maxLen;
}
}
OnWheelChangedListener类：
/*
* Copyright 2010 Yuri Kanivets
*
* 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 com.lakala.pay.easycashregisterphone2.view.datepicker;
/**
* Wheel changed listener interface.
* <p>The currentItemChanged() method is called whenever current wheel positions is changed:
* <li> New Wheel position is set
* <li> Wheel view is scrolled
*/
public interface OnWheelChangedListener {
/**
* Callback method to be invoked when current item changed
* @param wheel the wheel view whose state has changed
* @param oldValue the old value of current item
* @param newValue the new value of current item
*/
void onChanged(WheelView wheel, int oldValue, int newValue);
}
OnWheelScrollListener类：
/*
* Copyright 2010 Yuri Kanivets
*
* 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 com.lakala.pay.easycashregisterphone2.view.datepicker;
/**
* Wheel scrolled listener interface.
*/
public interface OnWheelScrollListener {
/**
* Callback method to be invoked when scrolling started.
* @param wheel the wheel view whose state has changed.
*/
void onScrollingStarted(WheelView wheel);
/**
* Callback method to be invoked when scrolling ended.
* @param wheel the wheel view whose state has changed.
*/
void onScrollingFinished(WheelView wheel);
}
WheelAdapter类：
/*
* Copyright 2010 Yuri Kanivets
*
* 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 com.lakala.pay.easycashregisterphone2.view.datepicker;
public interface WheelAdapter {
/**
* Gets items count
* @return the count of wheel items
*/
public int getItemsCount();
/**
* Gets a wheel item by index.
*
* @param index the item index
* @return the wheel item text or null
*/
public String getItem(int index);
/**
* Gets maximum item length. It is used to determine the wheel width.
* If -1 is returned there will be used the default wheel width.
*
* @return the maximum item length or -1
*/
public int getMaximumLength();
}
WheelView类：
/*
* Android Wheel Control.
* https://code.google.com/p/android-wheel/
*
* Copyright 2010 Yuri Kanivets
*
* 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 kankan.wheel.widget;
import java.util.LinkedList;
import java.util.List;
import org.unism.wang.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.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;
/**
* Numeric wheel view.
*
* @author Yuri Kanivets
*/
public class WheelView extends View {
/**
* Scrolling duration
*
* </br>
* 滚动持续时间(毫秒)
*/
private static final int SCROLLING_DURATION = 400;
/**
* Minimum delta for scrolling
*
* </br>
* 滚动的最小差值
*/
private static final int MIN_DELTA_FOR_SCROLLING = 1;
/**
* Current value & label text color
*
* </br>
* 当前选中项 的 文字 的 颜色
*/
private static final int VALUE_TEXT_COLOR = 0xFFFFFFFF;
/**
* Items text color
*
* </br>
* 选项 的 文字 的 颜色
*/
private static final int ITEMS_TEXT_COLOR = 0xFF000000;
/**
* Top and bottom shadows colors
*
* </br>
* 顶部和底部阴影 的 颜色 </br>
* 选择器 顶部和底部颜色是渐变的，这里指定一个渐变色的数组
*/
private static final int[] SHADOWS_COLORS = new int[] { 0xFFFFFFFF,
0x00EEEED5, 0x00EEEED5 };
/**
* Additional items height (is added to standard text item height)
*
* </br>
* 附加项的高度项的高度 (单位应该是dp) </br>
* 从后面getDesiredHeight() 函数看出，这个值应该是平分给每一个选项的。 </br>
* 类似于设置行距吧，不过这是一个总和，也就是有5个可见项，那么每个可见项的附加高就是 ADDITIONAL_ITEM_HEIGHT/5
*/
private static final int ADDITIONAL_ITEM_HEIGHT = 15;
/**
* Text size
*
* </br>
* 字号
*/
private static final int TEXT_SIZE = 24;
/**
* Top and bottom items offset (to hide that)
*
* </br>
* 这个是选项在顶部和底部被抵消的值。 </br>
* 怎么解释呢~ 其实试一下就知道了， </br>
* 比如说在picker中显示的五项(中间那个是选中的)，剩余4是没选中的。 </br>
* 在没选中的这4项中，位于顶部和底部的项，会用阴影遮挡(遮挡一部分，这样用户就明白是需要滑动操作了) </br>
* 这里设定的值，就是指定遮挡的size，这里的默认值 TEXT_SIZE / 5 是遮挡了1/5的字号 (那么单位也应该是sp吧)
*/
private static final int ITEM_OFFSET = TEXT_SIZE / 5;
/**
* Additional width for items layout
*
* </br>
* 附加项空间？ 不理解~~还是试试吧 </br>
* 应该是项的宽，这个属性应该是受制于外边区域的， 设置的太宽里面的文字显示会出问题 </br>
* 具体影响 有待进一步实验证明
*/
private static final int ADDITIONAL_ITEMS_SPACE = 10;
/**
* Label offset
*
* </br>
* 标签抵消 （作用未知） 用1,8，和800 三个值实验（8是默认值） 效果是一样的。
*/
private static final int LABEL_OFFSET = 8;
/**
* Left and right padding value
*
* </br>
* 填充 </br>
* 这个选项的内部填充，如果选项是个TextView的话，那这里设置的即是TextView的填充 </br>
* =。=！后面代码还米有看，item是啥我也不知道
*/
private static final int PADDING = 10;
/**
* Default count of visible items
*
* </br>
* 默认可见项的数目。就是picker中显示几项
*/
private static final int DEF_VISIBLE_ITEMS = 5;
// Wheel Values
/**
* Wheel Values
*
* </br>
* 适配器，items就通过适配器来提供的吧
*/
private WheelAdapter adapter = null;
/**
* Wheel Values
*
* </br>
* 当前项
*/
private int currentItem = 0;
// Widths
/**
* Widths
*
* </br>
* 做了实验 把值设为100 没有任何变化
*/
private int itemsWidth = 0;
/**
* Widths
*
* </br>
* 也做了实验 把值设为100 没有任何变化
*/
private int labelWidth = 0;
// Count of visible items
/**
* Count of visible items
*
* </br>
* 可见项目的条数
*/
private int visibleItems = DEF_VISIBLE_ITEMS;
// Item height
/**
* Item height
*
* </br>
* 是item的高
*/
private int itemHeight = 0;
// Text paints
/**
* Text paints
*
* </br>
* 选中文本的颜色
*/
private TextPaint itemsPaint;
/**
* Text paints
*
* </br>
* 未选中文本的颜色
*/
private TextPaint valuePaint;
// Layouts
/**
* Layouts
*
* </br>
* 选项 的 布局
*/
private StaticLayout itemsLayout;
/**
* Layouts
*
* </br>
* 标签 的 布局
*/
private StaticLayout labelLayout;
/**
* Layouts
*
* </br>
* 选中项 的 布局
*/
private StaticLayout valueLayout;
// Label & background
/**
* Label & background
*
* </br>
* 标签
*/
private String label;
/**
* Label & background
* 中间的几何体 </br>
* 选中区域的背景
*/
private Drawable centerDrawable;
// Shadows drawables
/**
* Shadows drawables
*
* </br>
* 上边 和 底部 的阴影部分的背景资源
*/
private GradientDrawable topShadow;
private GradientDrawable bottomShadow;
// Scrolling
/**
* Scrolling
*
* </br>
* 执行滚动？
*/
private boolean isScrollingPerformed;
/**
* Scrolling
*
* </br>
* 滚动抵消？
*/
private int scrollingOffset;
// Scrolling animation
/**
* Scrolling animation
*
* </br>
* 手势检测器
*/
private GestureDetector gestureDetector;
/**
* Scrolling animation
*
* </br>
* 卷轴
*/
private Scroller scroller;
/**
* Scrolling animation
*
* </br>
* 最后的 卷轴Y
*/
private int lastScrollY;
// Cyclic
/**
* Cyclic
*
* </br>
* 是否循环
*/
boolean isCyclic = false;
// Listeners
/**
* Listeners
*
* </br>
* 控件改变监听器的 集合
*/
private List<OnWheelChangedListener> changingListeners = new LinkedList<OnWheelChangedListener>();
/**
* Listeners
*
* </br>
* 控件滚动监听器的 集合
*/
private List<OnWheelScrollListener> scrollingListeners = new LinkedList<OnWheelScrollListener>();
/**
* Constructor
*
* </br>
* 构造器 并实例了手势检测器 和 卷轴
*/
public WheelView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
initData(context);
}
/**
* Constructor
*
* </br>
* 构造器 并实例了手势检测器 和 卷轴
*/
public WheelView(Context context, AttributeSet attrs) {
super(context, attrs);
initData(context);
}
/**
* Constructor
*
* </br>
* 构造器 并实例了手势检测器 和 卷轴
*/
public WheelView(Context context) {
super(context);
initData(context);
}
/**
* Initializes class data
* @param context the context
*
* </br>
* 数据初始化 </br>
* 就是把手势检测器 和 卷轴类 实例了 </br>
* 这个方法在所有的构造器中都被调用了
*/
private void initData(Context context) {
gestureDetector = new GestureDetector(context, gestureListener);
gestureDetector.setIsLongpressEnabled(false); //这个没看出来有什么用，不设置，或设置成true都不影响效果
scroller = new Scroller(context);
}
/**
* Gets wheel adapter
* @return the adapter
*
* </br>
* 获得适配器
*/
public WheelAdapter getAdapter() {
return adapter;
}
/**
* Sets wheel adapter
* @param adapter the new wheel adapter
*
* </br>
* 设置适配器 </br>
* 还会界面进行了重绘
*/
public void setAdapter(WheelAdapter adapter) {
this.adapter = adapter;
invalidateLayouts();
invalidate();
}
/**
* Set the the specified scrolling interpolator
* @param interpolator the interpolator
*
* </br>
* 作用也是设置 卷轴的吧，是通过动画插补器来实例 卷轴对象
*/
public void setInterpolator(Interpolator interpolator) {
scroller.forceFinished(true);
scroller = new Scroller(getContext(), interpolator);
}
/**
* Gets count of visible items
*
* @return the count of visible items
*
* </br>
* 获得可见项的条数
*/
public int getVisibleItems() {
return visibleItems;
}
/**
* Sets count of visible items
*
* @param count
* the new count
*
* </br>
* 设置可见项的条数 并重绘view
*/
public void setVisibleItems(int count) {
visibleItems = count;
invalidate();
}
/**
* Gets label
*
* @return the label
*
* </br>
* 获得标签
*/
public String getLabel() {
return label;
}
/**
* Sets label
*
* @param newLabel
* the label to set
*
* </br>
* 设置标签
*/
public void setLabel(String newLabel) {
if (label == null || !label.equals(newLabel)) {
label = newLabel;
labelLayout = null;
invalidate();
}
}
/**
* Adds wheel changing listener
* @param listener the listener
*
* </br>
* 添加控件改变监听器
*/
public void addChangingListener(OnWheelChangedListener listener) {
changingListeners.add(listener);
}
/**
* Removes wheel changing listener
* @param listener the listener
*
* </br>
* 移除控件改变监听器
*/
public void removeChangingListener(OnWheelChangedListener listener) {
changingListeners.remove(listener);
}
/**
* Notifies changing listeners
* @param oldValue the old wheel value
* @param newValue the new wheel value
*
* </br>
* 通知 改变监听器， </br>
* 循环 控件改变监听器集合， 并依次调用它们的onChenge方法
*/
protected void notifyChangingListeners(int oldValue, int newValue) {
for (OnWheelChangedListener listener : changingListeners) {
listener.onChanged(this, oldValue, newValue);
}
}
/**
* Adds wheel scrolling listener
* @param listener the listener
*
* </br>
* 添加控件滚动监听器
*/
public void addScrollingListener(OnWheelScrollListener listener) {
scrollingListeners.add(listener);
}
/**
* Removes wheel scrolling listener
* @param listener the listener
*
* </br>
* 移除控件滚动监听器
*/
public void removeScrollingListener(OnWheelScrollListener listener) {
scrollingListeners.remove(listener);
}
/**
* Notifies listeners about starting scrolling
*
* </br>
* 通知控件滚动监听器调用开始滚动的方法
*/
protected void notifyScrollingListenersAboutStart() {
for (OnWheelScrollListener listener : scrollingListeners) {
listener.onScrollingStarted(this);
}
}
/**
* Notifies listeners about ending scrolling
*
* </br>
* 通知控件滚动监听器调用结束滚动的方法
*/
protected void notifyScrollingListenersAboutEnd() {
for (OnWheelScrollListener listener : scrollingListeners) {
listener.onScrollingFinished(this);
}
}
/**
* Gets current value
*
* @return the current value
*
* </br>
* 返回当前项的索引
*/
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
*
* </br>
* 设置当前项 如果输入错误的索引，则控件什么都不会做哟 </br>
* 第二个参数是设置是否使用滚动动画的
*/
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
*
* </br>
* 设置当前选中项，默认是不启动动画的
*/
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
*
* </br>
* 是否循环显示
*/
public boolean isCyclic() {
return isCyclic;
}
/**
* Set wheel cyclic flag
* @param isCyclic the flag to set
*
* </br>
* 设置是否循环显示
*/
public void setCyclic(boolean isCyclic) {
this.isCyclic = isCyclic;
invalidate();
invalidateLayouts();
}
/**
* Invalidates layouts
*
* </br>
* 重绘布局 </br>
* 方法将 选项布局itemsLayout 和 选中项布局 valueLayout 赋值为null </br>
* 同事将 滚动抵消?scrollingOffset 设置为0 </br>
* （这个scrollingOffset 还没搞明白做什么用）
*/
private void invalidateLayouts() {
itemsLayout = null;
valueLayout = null;
scrollingOffset = 0;
}
/**
* Initializes resources
*
* </br>
* 初始化源 </br>
* 这个方法是这样的， 判断前面定义的画笔、背景资源等私有属性的值，如果是null就重新从静态常量中取值，并付给响应的属性。 </br>
* 如果这些必要属性为空的话，这个函数应该起到了初始化的作用
*/
private void initResourcesIfNecessary() {
if (itemsPaint == null) {
itemsPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG
| Paint.FAKE_BOLD_TEXT_FLAG);
//itemsPaint.density = getResources().getDisplayMetrics().density;
itemsPaint.setTextSize(TEXT_SIZE);
}
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(TEXT_SIZE);
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
*
* </br>
* 获得理想的控件高度，并保证其不低于建议的最小高度
*/
private int getDesiredHeight(Layout layout) {
if (layout == null) {
return 0;
}
int desired = getItemHeight() * visibleItems - ITEM_OFFSET * 2
- ADDITIONAL_ITEM_HEIGHT;
// Check against our minimum height
desired = Math.max(desired, getSuggestedMinimumHeight());
return desired;
}
/**
* Returns text item by index
* @param index the item index
* @return the item or null
*
* </br>
* 指定索引，获得选项的文本值(Sring) </br>
* 如果索引超出范围，控件又不是循环的（isCyclic），则返回null </br>
* 如果是循环的情况，方法内部进行了处理， </br>
* 为负数则+count, 然会取余
*/
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
*
* </br>
* 依赖当前项 构建文本 </br>
* 获得一个字符串，如果当前项目的索引为5, 可见项目数为3 </br>
* 则字符串的值为 getTextItem(3).append("\n").getTextItem(4).append("\n").getTextItem(5).append("\n").getTextItem(6).append("\n").getTextItem(7) </br>
* 如果 参数useCurrentValue为false </br>
* 则返回的字符串为 getTextItem(3).append("\n").getTextItem(4).append("\n").getTextItem(6).append("\n").getTextItem(7) </br>
* 如果getTextItem(i)返回null, 则不会向返回值中追加
*/
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
*
* </br>
* 获得最大的文本长度</br>
* 后面计算控件宽度用的
*/
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;
}
}//这个循环的范围没看明白呀，起始值不考虑循环吗？ 上限为什么是 当前项索引+可见项目数？
return maxText != null ? maxText.length() : 0;
}
/**
* Returns height of wheel item
* @return the item height
*
* </br>
* 获得选项高
*/
private int getItemHeight() {
if (itemHeight != 0) {
return itemHeight;
} else if (itemsLayout != null && itemsLayout.getLineCount() > 2) {
itemHeight = itemsLayout.getLineTop(2) - itemsLayout.getLineTop(1);
return itemHeight;
}//如果是itemlayout 为什么要用 第三行的top减第一行的top呢，不是应该返回layout的高嘛？没看明白
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
*
* </br>
* 计算布局宽
*/
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 more
labelWidth = 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 width
width = Math.max(width, getSuggestedMinimumWidth());
if (mode == MeasureSpec.AT_MOST && widthSize < width) {
width = widthSize;
recalculate = true;
}
}
if (recalculate) {
// recalculate width
int 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
*
* </br>
* 创建布局</br>
*/
private void createLayouts(int widthItems, int widthLabel) {
if (itemsLayout == null || itemsLayout.getWidth() > widthItems) {
itemsLayout = new StaticLayout(buildText(isScrollingPerformed), itemsPaint, widthItems,
widthLabel > 0 ? Layout.Alignment.ALIGN_OPPOSITE : Layout.Alignment.ALIGN_CENTER,
1, ADDITIONAL_ITEM_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, ADDITIONAL_ITEM_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,
ADDITIONAL_ITEM_HEIGHT, false);
} else {
labelLayout.increaseWidthTo(widthLabel);
}
}
}
/**
* 重写onMeasure 设置尺寸
*/
@Override
protected 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);
}
/**
* 绘制
*/
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (itemsLayout == null) {
if (itemsWidth == 0) {
calculateLayoutWidth(getWidth(), MeasureSpec.EXACTLY);
} else {
createLayouts(itemsWidth, labelWidth);
}
}
drawCenterRect(canvas); // 放在此处，字在背景色上
if (itemsWidth > 0) {
canvas.save();
// Skip padding space and hide a part of top and bottom items
canvas.translate(PADDING, -ITEM_OFFSET);
drawItems(canvas);
drawValue(canvas);
canvas.restore();
}
// drawCenterRect(canvas);// 放在此处，字在背景色下
drawShadows(canvas);
}
/**
* Draws shadows on top and bottom of control
* @param canvas the canvas for drawing
*
* </br>
* 绘制控件顶端 和底部的 阴影区域 </br>
* 需要传入画布对象
*/
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
*
* </br>
* 绘制选中项 和 标签
*/
private void drawValue(Canvas canvas) {
valuePaint.setColor(VALUE_TEXT_COLOR);
valuePaint.drawableState = getDrawableState();
Rect bounds = new Rect();
itemsLayout.getLineBounds(visibleItems / 2, bounds);
// draw label
if (labelLayout != null) {
canvas.save();
canvas.translate(itemsLayout.getWidth() + LABEL_OFFSET, bounds.top);
labelLayout.draw(canvas);
canvas.restore();
}
// draw current value
if (valueLayout != null) {
canvas.save();
canvas.translate(0, bounds.top + scrollingOffset);
valueLayout.draw(canvas);
canvas.restore();
}
}
/**
* Draws items
* @param canvas the canvas for drawing
*
* </br>
* 绘制选项
*/
private void drawItems(Canvas canvas) {
canvas.save();
int top = itemsLayout.getLineTop(1);
canvas.translate(0, - top + 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
*
* </br>
* 绘制中间的矩形区域
*/
private void drawCenterRect(Canvas canvas) {
int center = getHeight() / 2;
int offset = getItemHeight() / 2;
centerDrawable.setBounds(0, center - offset, getWidth(), center + offset);
centerDrawable.draw(canvas);
}
/**
* 触摸事件的 回调方法</br>
* 看到了吧 如果适配器 adapter是null 的话，这里是什么都不会做的。</br>
* 如果适配器不为空，将MotionEvent传递给手势识别器。 并判断是否已ACTION_UP </br>
* 如果是说明操作已结束 调用justify()方法。</br>
* return true. 不会泄露
*/
@Override
public 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
*
* </br>
* 滚动</br>
* 好像只是重新定义了 scrollingOffset的值，</br>
* 执行滚动的操作是这里吗？</br>
* 先往后看吧。
*/
private void doScroll(int delta) {
scrollingOffset += delta;
int count = scrollingOffset / getItemHeight();
int pos = currentItem - count;
if (isCyclic && adapter.getItemsCount() > 0) {
// fix position by rotating
while (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 position
pos = Math.max(pos, 0);
pos = Math.min(pos, adapter.getItemsCount() - 1);
}
int offset = scrollingOffset;
if (pos != currentItem) {
setCurrentItem(pos, false);
} else {
invalidate();
}
// update offset
scrollingOffset = offset - count * getItemHeight();
if (scrollingOffset > getHeight()) {
scrollingOffset = scrollingOffset % getHeight() + getHeight();
}
}
// gesture listener
/**
* gesture listener
*
* </br>
* 手势监听器</br>
* 这里是响应用户fling 以及 scroll操作的代码
*/
private SimpleOnGestureListener gestureListener = new SimpleOnGestureListener() {
/**
* 这个是按下时停止滚动的操作
*/
public boolean onDown(MotionEvent e) {
if (isScrollingPerformed) {
scroller.forceFinished(true);
clearMessages();
return true;
}
return false;
}
/**
* scroll
*/
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
startScrolling();
doScroll((int)-distanceY);
return true;
}
/**
* fling
*/
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;
}
};
// Messages
/**
* Messages
*
* </br>
* 向动画处理器发送的消息 -滚动
*/
private final int MESSAGE_SCROLL = 0;
/**
* Messages
*
* </br>
* 向动画处理器发送的消息 -证明
*/
private final int MESSAGE_JUSTIFY = 1;
/**
* Set next message to queue. Clears queue before.
*
* @param message the message to set
*
* </br>
* 清楚动画处理器animationHandler中的原有消息，并发送新消息
*/
private void setNextMessage(int message) {
clearMessages();
animationHandler.sendEmptyMessage(message);
}
/**
* Clears messages from queue
*
* </br>
* 清楚动画处理器中原有的消息
*/
private void clearMessages() {
animationHandler.removeMessages(MESSAGE_SCROLL);
animationHandler.removeMessages(MESSAGE_JUSTIFY);
}
// animation handler
/**
* animation handler
*
* </br>
* 动画处理器
*/
private 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
*
* </br>
* 验证轮子
*/
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;
else
offset -= 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
*
* </br>
* 开始滚动</br>
* 并通知开始滚动监听器
*/
private void startScrolling() {
if (!isScrollingPerformed) {
isScrollingPerformed = true;
notifyScrollingListenersAboutStart();
}
}
/**
* Finishes scrolling
*
* </br>
* 结束滚动</br>
* 并通知结束滚动监听器
*/
void finishScrolling() {
if (isScrollingPerformed) {
notifyScrollingListenersAboutEnd();
isScrollingPerformed = false;
}
invalidateLayouts();
invalidate();
}
/**
* Scroll the wheel
* @param itemsToSkip items to scroll
* @param time scrolling duration
*
* 滚动
*/
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();
}
}
MyDatePicker类：
package com.lakala.pay.easycashregisterphone2.view.datepicker;
import java.util.Calendar;
import android.content.Context;
import android.util.AttributeSet;
import android.widget.LinearLayout;
import android.widget.LinearLayout.LayoutParams;
/**
* DatePicker
*/
public class MyDatePicker extends LinearLayout {
private Calendar calendar = Calendar.getInstance(); //日历类
private WheelView years, months, days; //Wheel picker
private OnChangeListener onChangeListener; //onChangeListener
//Constructors
public MyDatePicker(Context context) {
super(context);
init(context);
}
public MyDatePicker(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
/**
* 初始化
* @param context
*/
private void init(Context context){
years = new WheelView(context);
LinearLayout.LayoutParams yearParams = new LayoutParams(android.view.ViewGroup.LayoutParams.WRAP_CONTENT,
android.view.ViewGroup.LayoutParams.WRAP_CONTENT);
yearParams.weight = 1;
years.setLayoutParams(yearParams);
months = new WheelView(context);
LinearLayout.LayoutParams monthParams = new LayoutParams(android.view.ViewGroup.LayoutParams.WRAP_CONTENT,
android.view.ViewGroup.LayoutParams.WRAP_CONTENT);
monthParams.weight = 1;
months.setLayoutParams(monthParams);
days = new WheelView(context);
LinearLayout.LayoutParams dayParams = new LayoutParams(android.view.ViewGroup.LayoutParams.WRAP_CONTENT,
android.view.ViewGroup.LayoutParams.WRAP_CONTENT);
dayParams.weight = 1;
days.setLayoutParams(dayParams);
NumericWheelAdapter numericWheelAdapter = new NumericWheelAdapter(1900, 9999);
years.setAdapter(numericWheelAdapter);
// year.setLabel("年");
// years.setCurrentItem(2005-1801);
months.setAdapter(new NumericWheelAdapter(1, 12, "%02d"));
// month.setLabel("月");
months.setCyclic(true);
int maxday_of_month = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
days.setAdapter(new NumericWheelAdapter(1, maxday_of_month, "%02d"));
// day.setLabel("日");
days.setCyclic(true);
years.addChangingListener(onYearsChangedListener);
months.addChangingListener(onMonthsChangedListener);
days.addChangingListener(onDaysChangedListener);
addView(years);
addView(months);
addView(days);
}
//listeners
private OnWheelChangedListener onYearsChangedListener = new OnWheelChangedListener(){
@Override
public void onChanged(WheelView hours, int oldValue, int newValue) {
calendar.set(Calendar.YEAR, 1900 + newValue);
onChangeListener.onChange(getYear(), getMonth(), getDay(), getDayOfWeek());
setMonth(getMonth());
setDay(getDay());
days.setAdapter(new NumericWheelAdapter(1, calendar.getActualMaximum(Calendar.DAY_OF_MONTH), "%02d"));
}
};
private OnWheelChangedListener onMonthsChangedListener = new OnWheelChangedListener(){
@Override
public void onChanged(WheelView mins, int oldValue, int newValue) {
calendar.set(Calendar.MONTH, 1 + newValue - 1);
onChangeListener.onChange(getYear(), getMonth(), getDay(), getDayOfWeek());
setMonth(getMonth());
setDay(getDay());
days.setAdapter(new NumericWheelAdapter(1, calendar.getActualMaximum(Calendar.DAY_OF_MONTH), "%02d"));
}
};
private OnWheelChangedListener onDaysChangedListener = new OnWheelChangedListener(){
@Override
public void onChanged(WheelView mins, int oldValue, int newValue) {
calendar.set(Calendar.DAY_OF_MONTH, newValue + 1);
onChangeListener.onChange(getYear(), getMonth(), getDay(), getDayOfWeek());
days.setAdapter(new NumericWheelAdapter(1, calendar.getActualMaximum(Calendar.DAY_OF_MONTH), "%02d"));
}
};
/**
* 定义了监听时间改变的监听器借口
*/
public interface OnChangeListener {
void onChange(int year, int month, int day, int day_of_week);
}
/**
* 设置监听器的方法
* @param onChangeListener
*/
public void setOnChangeListener(OnChangeListener onChangeListener){
this.onChangeListener = onChangeListener;
}
/**
* 设置年
* @param year
*/
public void setYear(int year){
years.setCurrentItem(year-1900);
}
/**
* 获得年
* @return
*/
public int getYear(){
return calendar.get(Calendar.YEAR);
}
/**
* 设置月
*/
public void setMonth(int month){
months.setCurrentItem(month - 1);
}
/**
* 获得月
* @return
*/
public int getMonth(){
return calendar.get(Calendar.MONTH)+1;
}
/**
* 设置日
* @param day
*/
public void setDay(int day){
days.setCurrentItem(day - 1);
}
/**
* 获得日
* @return
*/
public int getDay(){
return calendar.get(Calendar.DAY_OF_MONTH);
}
/**
* 获得星期
* @return
*/
public int getDayOfWeek(){
return calendar.get(Calendar.DAY_OF_WEEK);
}
/**
* 获得星期
* @return
*/
public static String getDayOfWeekCN(int day_of_week){
String result = null;
switch(day_of_week){
case 1:
result = "日";
break;
case 2:
result = "一";
break;
case 3:
result = "二";
break;
case 4:
result = "三";
break;
case 5:
result = "四";
break;
case 6:
result = "五";
break;
case 7:
result = "六";
break;
default:
break;
}
return result;
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
//默认设置为系统时间
setYear(getYear());
setMonth(getMonth());
setDay(getDay());
}
}
调用方法：
/***
* 时间控件
* @param text
*/
protected void datePickerShow(final TextView textView) {
// DatePickerDialog picker = new DatePickerDialog(this,
// new OnDateSetListener() {
// @Override
// public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
// if (monthOfYear < 9 && dayOfMonth < 10) {
// textView.setText(year + "-0" + (monthOfYear + 1) + "-0" + dayOfMonth);
// } else if (monthOfYear >= 9 && dayOfMonth < 10) {
// textView.setText(year + "-" + (monthOfYear + 1) + "-0" + dayOfMonth);
// } else if (monthOfYear < 9 && dayOfMonth >= 10) {
// textView.setText(year + "-0" + (monthOfYear + 1) + "-" + dayOfMonth);
// } else {
// textView.setText(year + "-" + (monthOfYear + 1) + "-" + dayOfMonth);
// }
// }
// }, cd.get(Calendar.YEAR), cd.get(Calendar.MONTH), cd.get(Calendar.DAY_OF_MONTH));
// picker.show();
final Dialog dialog = new Dialog(this, R.style.Theme_ShareDialog);
dialog.setContentView(R.layout.datepickerdialog);
MyDatePicker dpicker = (MyDatePicker) dialog.findViewById(R.id.datepicker_layout);
final TextView txDateAndWeekDay = (TextView) dialog.findViewById(R.id.datepicker_date_and_weekday);
Button btBeDown = (Button) dialog.findViewById(R.id.datepicker_btsure);
Button btCancel = (Button) dialog.findViewById(R.id.datepicker_btcancel);
dpicker.setOnChangeListener(new MyDatePicker.OnChangeListener() {
@Override
public void onChange(int year, int month, int day, int day_of_week) {
// txDateAndWeekDay.setText(year + "年" + month + "月" + day + "日 星期" + MyDatePicker.getDayOfWeekCN(day_of_week));
dateYear = year;
dateMonth = month;
dateDay = day;
if (dateMonth < 10 && dateDay < 10) {
txDateAndWeekDay.setText(dateYear + "-0" + dateMonth + "-0" + dateDay+ " 星期" + MyDatePicker.getDayOfWeekCN(day_of_week));
} else if (dateMonth >= 10 && dateDay < 10) {
txDateAndWeekDay.setText(dateYear + "-" + dateMonth + "-0" + dateDay+ " 星期" + MyDatePicker.getDayOfWeekCN(day_of_week));
} else if (dateMonth < 10 && dateDay >= 10) {
txDateAndWeekDay.setText(dateYear + "-0" + dateMonth + "-" + dateDay+ " 星期" + MyDatePicker.getDayOfWeekCN(day_of_week));
} else {
txDateAndWeekDay.setText(dateYear + "-" + dateMonth + "-" + dateDay+ " 星期" + MyDatePicker.getDayOfWeekCN(day_of_week));
}
}
});
btBeDown.setOnClickListener(new Button.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (dateMonth < 10 && dateDay < 10) {
textView.setText(dateYear + "-0" + dateMonth + "-0" + dateDay);
} else if (dateMonth >= 10 && dateDay < 10) {
textView.setText(dateYear + "-" + dateMonth + "-0" + dateDay);
} else if (dateMonth < 10 && dateDay >= 10) {
textView.setText(dateYear + "-0" + dateMonth + "-" + dateDay);
} else {
textView.setText(dateYear + "-" + dateMonth + "-" + dateDay);
}
// textView.setText(dateYear + "-" + dateMonth + "-" + dateDay);
dialog.dismiss();
}
});
btCancel.setOnClickListener(new Button.OnClickListener() {
public void onClick(View view) {
dialog.dismiss();
}
});
dialog.setCancelable(false);
dialog.setOnKeyListener(new android.content.DialogInterface.OnKeyListener() {
@Override
public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) {
switch (keyCode) {
case KeyEvent.KEYCODE_BACK:
return true;
}
return false;
}
});
dialog.show();
}
涉及到的xml文件：
layout文件下：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/dialog_bg"
android:layout_gravity="center"
android:orientation="vertical" >
<TextView
android:id="@+id/datepicker_date_and_weekday"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:singleLine="true"
android:textColor="@color/black"
android:textSize="@dimen/main_bottom_more_size"
android:ellipsize="middle"/>
<View
android:layout_width="fill_parent"
android:layout_height="1dp"
android:layout_marginTop="5dp"
android:background="@color/grayblack"/>
<com.lakala.pay.easycashregisterphone2.view.datepicker.MyDatePicker
android:id="@+id/datepicker_layout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
</com.lakala.pay.easycashregisterphone2.view.datepicker.MyDatePicker>
<View
android:layout_width="fill_parent"
android:layout_height="0.5dp"
android:background="@color/grayblack"/>
<LinearLayout
android:id="@+id/datepicker_button_layout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:gravity="center"
android:orientation="horizontal">
<Button
android:id="@+id/datepicker_btsure"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_marginLeft="10dp"
android:layout_marginRight="5dp"
android:textColor="@color/white"
android:text="@string/bedown"
android:background="@drawable/btn1_normal"/>
<Button
android:id="@+id/datepicker_btcancel"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_marginLeft="5dp"
android:layout_marginRight="10dp"
android:textColor="@color/white"
android:text="@string/cact_cancel"
android:background="@drawable/btn1_normal"/>
</LinearLayout>
</LinearLayout>
drawable文件下：
layout_bg.xml:
<?xml version="1.0" encoding="utf-8"?>
<!--
Android Wheel Control.
http://android-devblog.blogspot.com/2010/05/wheel-ui-contol.html
Copyright 2010 Yuri Kanivets
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.
-->
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<gradient
android:startColor="#FF000000"
android:centerColor="#FF000000"
android:endColor="#FF777777"
android:angle="90" />
</shape>
wheel_bg.xml:
<?xml version="1.0" encoding="utf-8"?>
<!--
Android Wheel Control.
http://android-devblog.blogspot.com/2010/05/wheel-ui-contol.html
Copyright 2010 Yuri Kanivets
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.
-->
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape android:shape="rectangle">
<gradient
android:startColor="#FFFFFF"
android:centerColor="#FFFFFF"
android:endColor="#FFFFFF"
android:angle="90" />
</shape>
</item>
</layer-list>
wheel_var.xml:
<?xml version="1.0" encoding="utf-8"?>
<!--
Android Wheel Control.
http://android-devblog.blogspot.com/2010/05/wheel-ui-contol.html
Copyright 2010 Yuri Kanivets
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.
-->
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<gradient
android:startColor="#FF00b5ef"
android:centerColor="#FF00b5ef"
android:endColor="#FF00b5ef"
android:angle="90" />
<stroke android:width="1dp" android:color="#FFFFFFFF" />
</shape>