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:orientation="vertical" > 6  7     <TextView 8         android:id="@+id/dateText" 9         android:layout_width="wrap_content"10         android:layout_height="wrap_content"11         />12     <Button 13         android:id="@+id/dateButton"14         android:layout_width="fill_parent"15         android:layout_height="wrap_content"16         android:text="设置日期"17         />18     <TextView19         android:id="@+id/timeText"20         android:layout_width="wrap_content"21         android:layout_height="wrap_content"22         />23     <Button 24         android:id="@+id/timeButton"25         android:layout_width="fill_parent"26         android:layout_height="wrap_content"27         android:text="设置时间"28         />29     30 </LinearLayout>

  1 package com.tiantian.test;  2   3 import java.util.Calendar;  4   5 import android.app.Activity;  6 import android.app.DatePickerDialog;  7 import android.app.DatePickerDialog.OnDateSetListener;  8 import android.app.Dialog;  9 import android.app.TimePickerDialog; 10 import android.app.TimePickerDialog.OnTimeSetListener; 11 import android.content.Intent; 12 import android.graphics.Bitmap; 13 import android.graphics.BitmapFactory; 14 import android.graphics.Matrix; 15 import android.net.Uri; 16 import android.os.Bundle; 17 import android.os.SystemClock; 18 import android.util.DisplayMetrics; 19 import android.view.View; 20 import android.view.View.OnClickListener; 21 import android.widget.Button; 22 import android.widget.Chronometer; 23 import android.widget.DatePicker; 24 import android.widget.DatePicker.OnDateChangedListener; 25 import android.widget.ImageView; 26 import android.widget.TextView; 27 import android.widget.TimePicker; 28 import android.widget.TimePicker.OnTimeChangedListener; 29 import android.widget.ZoomControls; 30  31 public class TextAndridActivity extends Activity { 32     /** Called when the activity is first created. */ 33     private TextView dateText; 34     private TextView timeText; 35     private Button dateButton; 36     private Button timeButton; 37      38     private int year; 39     private int monthOfYear; 40     private int dayOfMonth; 41     private int hour; 42     private int minute; 43     //声明一个独一无二的标识，来作为要显示DatePicker的Dialog的ID 44     final static int DATE_DIALOG_ID = 1; 45     //声明一个独一无二的标识，来作为要显示TimePicker的Dialog的ID 46     final static int TIME_DIALOG_ID = 2; 47     @Override 48     public void onCreate(Bundle savedInstanceState) { 49         super.onCreate(savedInstanceState); 50         setContentView(R.layout.main); 51          52         dateText = (TextView) findViewById(R.id.dateText); 53         timeText = (TextView) findViewById(R.id.timeText); 54         dateButton = (Button) findViewById(R.id.dateButton); 55         dateButton.setOnClickListener(new OnClickListener() { 56              57             @Override 58             public void onClick(View v) { 59                 //调用Activity类的方法来显示Dialog:调用这个方法会允许Activity管理该Dialog的生命周期，   60 //并会调用 onCreateDialog(int)回调函数来请求一个Dialog 61                 showDialog(DATE_DIALOG_ID); 62             } 63         }); 64         timeButton = (Button) findViewById(R.id.timeButton); 65         timeButton.setOnClickListener(new OnClickListener() { 66              67             @Override 68             public void onClick(View v) { 69                 //调用Activity类的方法来显示Dialog:调用这个方法会允许Activity管理该Dialog的生命周期，   70 //并会调用 onCreateDialog(int)回调函数来请求一个Dialog 71                 showDialog(TIME_DIALOG_ID); 72             } 73         }); 74         //得到当前日期和时间(作为初始值) 75         Calendar calendar = Calendar.getInstance(); 76         year = calendar.get(Calendar.YEAR); 77         monthOfYear = calendar.get(Calendar.MONTH); 78         dayOfMonth = calendar.get(Calendar.DAY_OF_MONTH); 79         hour = calendar.get(Calendar.HOUR_OF_DAY); 80         minute = calendar.get(Calendar.MINUTE); 81          82     } 83      84     //当Activity调用showDialog函数时会触发该函数的调用： 85     @Override 86     protected Dialog onCreateDialog(int id) { 87         // TODO Auto-generated method stub 88         switch(id){ 89         case DATE_DIALOG_ID: 90             return new DatePickerDialog(this, new OnDateSetListener() { 91                  92                 @Override 93                 public void onDateSet(DatePicker view, int year, int monthOfYear, 94                         int dayOfMonth) { 95                     // TODO Auto-generated method stub 96                     dateText.setText(year + "年" + (monthOfYear + 1) + "月" + dayOfMonth + "日"); 97                 } 98             }, year, monthOfYear, dayOfMonth); 99         case TIME_DIALOG_ID:100             return new TimePickerDialog(this, new OnTimeSetListener() {101                 102                 @Override103                 public void onTimeSet(TimePicker view, int hourOfDay, int minute) {104                     // TODO Auto-generated method stub105                     timeText.setText(hourOfDay + "时" + minute + "分");106                 }107             }, hour, minute, true);108         }109         return null;110     }111     112     113     114 }