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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>
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 }
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 }
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 }
使用NumberPicker定制自己喜欢的Date&TimePicker
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原文地址:http://www.cnblogs.com/songjie-xuan/p/5942669.html