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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 <NumberPicker16 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 <NumberPicker23 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 <NumberPicker30 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 year102 * @param month 取值范围1-12103 * @return104 */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 @Override21 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 @Override34 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 @Override14 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 @Override20 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 @Override28 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:ss41 */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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