• 使用NumberPicker定制自己喜欢的Date&TimePicker


    1.NumberPicker简介:

      NumberPicker是Android3.0之后引入的一个控件,主要功能是用于选择一组预定义好数字的控件。

      该控件主要需要指导一个用于监听当前value变化的listener、一个用于监听该控件scroll状态的listener和一个用于格式化显示该控件中value的formatter:

        1) NumberPicker.OnValueChangeListener :其函数public void onValueChange(NumberPicker picker, int oldVal, int newVal) ;oldVal前一个选中的值,newValue当前选中的值。

        2) NumberPicker.OnScrollListener:其内部有三种scroll状态SCROLL_STATE_FLING 、 SCROLL_STATE_IDLE 、 SCROLL_STATE_TOUCH_SCROLL。

            SCROLL_STATE_TOUCH_SCROLL:用户按下去然后滑动。

            SCROLL_STATE_FLING: 相当于是SCROLL_STATE_TOUCH_SCROLL的后续滑动操作。

            SCROLL_STATE_IDLE: NumberPicker不在滚动。

        3) NumberPicker.Formatter: 格式化显示数字,例如0—23格式化为00 — 23 。

    2.使用NumberPicker定制Date&TimePicker:

      1) 创建布局样式

     1 <?xml version="1.0" encoding="utf-8"?>
     2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     3     android:layout_width="fill_parent"
     4     android:layout_height="fill_parent"
     5     android:gravity="center"
     6     android:orientation="vertical">
     7 
     8     <LinearLayout
     9         android:layout_width="match_parent"
    10         android:layout_height="wrap_content"
    11         android:gravity="center_horizontal"
    12         android:orientation="horizontal"
    13         android:paddingRight="10dp">
    14 
    15         <NumberPicker
    16             android:id="@+id/date_year_picker"
    17             android:layout_width="0dp"
    18             android:layout_height="wrap_content"
    19             android:layout_marginLeft="10dp"
    20             android:layout_weight="1" />
    21 
    22         <NumberPicker
    23             android:id="@+id/date_mouth_picker"
    24             android:layout_width="0dp"
    25             android:layout_height="wrap_content"
    26             android:layout_marginLeft="10dp"
    27             android:layout_weight="1" />
    28 
    29         <NumberPicker
    30             android:id="@+id/date_day_picker"
    31             android:layout_width="0dp"
    32             android:layout_height="wrap_content"
    33             android:layout_marginLeft="10dp"
    34             android:layout_weight="1" />
    35     </LinearLayout>
    36 </LinearLayout>
    View Code

      2) 继承FrameLayout实现填充布局

      1 package com.snd.picker;
      2 
      3 import android.content.Context;
      4 import android.util.Log;
      5 import android.widget.FrameLayout;
      6 import android.widget.NumberPicker;
      7 
      8 import java.util.Calendar;
      9 
     10 /**
     11  * Created by Hebo-KA-0045 on 2016/10/9.
     12  */
     13 
     14 public class DatePicker extends FrameLayout {
     15 
     16     private int mYear, mMonth, mDay;// 当前年月日
     17     private String[] mDateDisplayValues = new String[7];
     18     private Calendar mDate;
     19 
     20     private NumberPicker mDateYearPicker, mDateMonthPicker, mDateDayPicker;
     21 
     22     private OnDateChangedListener mOnDateChangedListener;
     23 
     24     public DatePicker(Context context) {
     25         super(context);
     26         mDate = Calendar.getInstance();
     27         mYear = mDate.get(Calendar.YEAR);
     28         mMonth = mDate.get(Calendar.MONTH);
     29         mDay = mDate.get(Calendar.DAY_OF_MONTH);
     30 
     31         init(context);// 加载布局文件,并初始化相应控件
     32     }
     33 
     34     /**
     35      * 加载布局,并初始化控件
     36      *
     37      * @param context
     38      */
     39     private void init(Context context) {
     40         inflate(context, R.layout.date_picker_dialog, this);// 加载布局
     41 
     42         /**
     43          * 初始化控件
     44          */
     45         mDateYearPicker = (NumberPicker) this.findViewById(R.id.date_year_picker);
     46         mDateYearPicker.setMinValue(1900);
     47         mDateYearPicker.setMaxValue(2100);
     48         mDateYearPicker.setValue(mYear);
     49         mDateMonthPicker = (NumberPicker) this.findViewById(R.id.date_mouth_picker);
     50         mDateMonthPicker.setMinValue(1);
     51         mDateMonthPicker.setMaxValue(12);
     52         mDateMonthPicker.setValue(mMonth + 1);
     53         mDateDayPicker = (NumberPicker) this.findViewById(R.id.date_day_picker);
     54         mDateDayPicker.setMinValue(1);
     55         mDateDayPicker.setMaxValue(getDaysInMonthAndYear(mYear, mMonth - 1));
     56         mDateDayPicker.setValue(mDay);
     57 
     58         initListener(context);
     59     }
     60 
     61     /**
     62      * 初始化监听器
     63      */
     64     private void initListener(final Context context) {
     65         mDateYearPicker.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {
     66             @Override
     67             public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
     68                 mDate.add(Calendar.YEAR, newVal - oldVal);
     69                 mYear = mDateYearPicker.getValue();
     70                 mDateDayPicker.setMaxValue(getDaysInMonthAndYear(mYear, mMonth));
     71                 if (mYear == 1900 || mYear == 2100) {
     72                     mDateYearPicker.setWrapSelectorWheel(false);
     73                 } else if (mYear > Calendar.YEAR) {
     74                 }
     75                 onDateChanged();
     76             }
     77         });
     78         mDateMonthPicker.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {
     79             @Override
     80             public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
     81                 mDate.add(Calendar.MONTH, newVal - oldVal);
     82                 mMonth = mDateMonthPicker.getValue();
     83                 mDateDayPicker.setMaxValue(getDaysInMonthAndYear(mYear, mMonth));
     84                 onDateChanged();
     85             }
     86         });
     87         mDateDayPicker.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {
     88             @Override
     89             public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
     90                 mDate.add(Calendar.DAY_OF_MONTH, newVal - oldVal);
     91                 mMonth = mDateMonthPicker.getValue();
     92                 mDay = mDateDayPicker.getValue();
     93                 onDateChanged();
     94             }
     95         });
     96     }
     97 
     98     /**
     99      * 获取某一年某一月的天数
    100      *
    101      * @param year
    102      * @param month 取值范围1-12
    103      * @return
    104      */
    105     private int getDaysInMonthAndYear(int year, int month) {
    106         Calendar calendar = Calendar.getInstance();
    107         calendar.set(Calendar.YEAR, year);
    108         calendar.set(Calendar.MONTH, month - 1);
    109         return calendar.getActualMaximum(Calendar.DATE);
    110 
    111     }
    112 
    113     private void onDateChanged() {
    114         if (mOnDateChangedListener != null) {
    115             mOnDateChangedListener.onDateChanged(this, mYear, mMonth, mDay);
    116         }
    117     }
    118 
    119     /*
    120      *对外的公开方法
    121      */
    122     public void setOnDateTimeChangedListener(OnDateChangedListener listener) {
    123         mOnDateChangedListener = listener;
    124     }
    125 
    126     public interface OnDateChangedListener {
    127         void onDateChanged(DatePicker view, int year, int month, int day);
    128     }
    129 }
    View Code

      3) 实现自定义Dialog

     1 package com.snd.picker;
     2 
     3 import android.app.AlertDialog;
     4 import android.content.Context;
     5 import android.content.DialogInterface;
     6 import android.text.format.DateUtils;
     7 
     8 import java.util.Calendar;
     9 
    10 /**
    11  * Created by Hebo-KA-0045 on 2016/10/9.
    12  */
    13 public class DatePickerDialog extends AlertDialog implements DialogInterface.OnClickListener {
    14 
    15     private DatePicker mDatePicker;
    16     private Calendar mDate;
    17 
    18     private OnDateSetListener mOnDateSetListener;
    19 
    20     @Override
    21     public void onClick(DialogInterface dialog, int which) {
    22         if (mOnDateSetListener != null) {
    23             mOnDateSetListener.OnDateSet(this, mDate.getTimeInMillis());
    24         }
    25     }
    26 
    27     public DatePickerDialog(Context context, long date) {
    28         super(context);
    29         mDate = Calendar.getInstance();
    30         mDatePicker = new DatePicker(context);
    31         setView(mDatePicker);
    32         mDatePicker.setOnDateTimeChangedListener(new DatePicker.OnDateChangedListener() {
    33             @Override
    34             public void onDateChanged(DatePicker view, int year, int month, int day) {
    35                 mDate.set(Calendar.YEAR, year);
    36                 mDate.set(Calendar.MONTH, month - 1);
    37                 mDate.set(Calendar.DAY_OF_MONTH, day);
    38 
    39                 updateTitle(mDate.getTimeInMillis());
    40             }
    41         });
    42 
    43         setButton("确定", this);
    44         mDate.setTimeInMillis(date);
    45         updateTitle(mDate.getTimeInMillis());
    46     }
    47 
    48     private void updateTitle(long date) {
    49         int flag = DateUtils.FORMAT_SHOW_YEAR | DateUtils.FORMAT_SHOW_DATE;
    50         setTitle(DateUtils.formatDateTime(this.getContext(), date, flag));
    51     }
    52 
    53     /*
    54      * 对外公开方法让Activity实现
    55      */
    56     public void setOnDateSetListener(OnDateSetListener listener) {
    57         mOnDateSetListener = listener;
    58     }
    59 
    60     /**
    61      * 接口回调
    62      * 控件 秒数
    63      */
    64     public interface OnDateSetListener {
    65         void OnDateSet(AlertDialog dialog, long date);
    66     }
    67 }
    View Code

      4) 使用

     1 package com.snd.picker;
     2 
     3 import android.app.Activity;
     4 import android.app.AlertDialog;
     5 import android.os.Bundle;
     6 import android.view.View;
     7 import android.widget.Toast;
     8 
     9 import java.text.SimpleDateFormat;
    10 
    11 public class MainActivity extends Activity {
    12 
    13     @Override
    14     protected void onCreate(Bundle savedInstanceState) {
    15         super.onCreate(savedInstanceState);
    16         setContentView(R.layout.main_acty);
    17 
    18         findViewById(R.id.btn).setOnClickListener(new View.OnClickListener() {
    19             @Override
    20             public void onClick(View v) {
    21                 DatePickerDialog dialog = new DatePickerDialog(MainActivity.this,
    22                         System.currentTimeMillis());
    23                 /**
    24                  * 实现接口
    25                  */
    26                 dialog.setOnDateSetListener(new DatePickerDialog.OnDateSetListener() {
    27                     @Override
    28                     public void OnDateSet(AlertDialog dialog, long date) {
    29                         Toast.makeText(MainActivity.this,
    30                                 "您输入的日期是:" + getStringDate(date), Toast.LENGTH_LONG)
    31                                 .show();
    32                     }
    33                 });
    34                 dialog.show();
    35             }
    36         });
    37     }
    38 
    39     /**
    40      * 将长时间格式字符串转换为时间 yyyy-MM-dd HH:mm:ss
    41      */
    42     public static String getStringDate(Long date) {
    43         SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    44         String dateString = formatter.format(date);
    45         return dateString;
    46     }
    47 }
    View Code
    但行好事,莫问前程;你若盛开,蝴蝶自来;你若坚强,命运自会给你打赏。
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  • 原文地址:https://www.cnblogs.com/songjie-xuan/p/5942669.html
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