在Android应用中，设置日期和时间是非常简单的事，由日期和时间对话框控件搞定。

一、界面

　　1、打开“src/com.genwoxue.datetimediy/active_main.java”文件。

　　然后输入以下代码：

      
     
           
      
                     
           
        
           
           
           

2、打开“src/com.genwoxue.datetimediy/MainActivity.java”文件。

　　然后输入以下代码：

import java.util.Calendar; import android.app.Activity; import android.app.DatePickerDialog; import android.app.Dialog; import android.app.TimePickerDialog; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.DatePicker; import android.widget.EditText; import android.widget.TimePicker; public class MainActivity extends Activity {
     	private Button dateBtn = null; 	private Button timeBtn = null; 	private EditText et = null; 	private final static int DATE_DIALOG = 0; 	private final static int TIME_DIALOG = 1; 	private Calendar c = null; 	@Override 	protected void onCreate(Bundle savedInstanceState) {
     		super.onCreate(savedInstanceState); 		setContentView(R.layout.activity_main); 		et = (EditText) findViewById(R.id.et); 		dateBtn = (Button) findViewById(R.id.dateBtn); 		timeBtn = (Button) findViewById(R.id.timeBtn); 		dateBtn.setOnClickListener(new View.OnClickListener() {//这样写不用import android.view.View.OnClickListener; 			@SuppressWarnings("deprecation") 			@Override 			public void onClick(View v) {
     				showDialog(DATE_DIALOG);//废弃的自带方法 			} 		}); 		timeBtn.setOnClickListener(new OnClickListener() {//这样写要import android.view.View.OnClickListener; 			@Override 			public void onClick(View arg0) {
     				showDialog(TIME_DIALOG); 			} 		}); 	} 	//创建日期及时间选择对话框 	protected Dialog onCreateDialog(int id){
     		Dialog dialog = null; 		switch(id){
     			case DATE_DIALOG: 				c = Calendar.getInstance(); 				dialog = new DatePickerDialog(this,new DatePickerDialog.OnDateSetListener() {
     					@Override 					public void onDateSet(DatePicker dp, int year, int month, int dayOfMonth) {
     						et.setText("您选择了："+year+"年"+(month+1)+"月"+dayOfMonth+"日"); 					} 				}, c.get(Calendar.YEAR),//传入年份 				  c.get(Calendar.MONTH),//传入月份 				  c.get(Calendar.DAY_OF_MONTH));//传入天数 				break; 			case TIME_DIALOG: 				c = Calendar.getInstance(); 				dialog = new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {
     					@Override 					public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
     						et.setText("您选择了："+hourOfDay+"时"+minute+"分"); 					} 				}, c.get(Calendar.HOUR_OF_DAY), 				   c.get(Calendar.MINUTE), 				   false); 				break; 		} 		return dialog; 	} }

2、运行，显示界面：

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