时间选择器DatePickerDialog的简单demo

xml文件：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >


    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:text="null"
        android:textAppearance="?android:attr/textAppearanceLarge" />


    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:onClick="selectTime"
        android:text="选择时间" />


</RelativeLayout>

activity文件:

package com.example.timeselect;


import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.DatePickerDialog.OnDateSetListener;
import android.os.Bundle;
import android.view.View;
import android.widget.DatePicker;
import android.widget.TextView;


public class MainActivity extends Activity {
private TextView txt;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
txt=(TextView)findViewById(R.id.textView1);
}


public void selectTime(View v){
DatePickerDialog dialog=new DatePickerDialog(this,new OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
String birthday=year+"/"+(monthOfYear+1)+"/"+dayOfMonth;
txt.setText(birthday);
}
},2015,10,5); //后面三个参数是默认时间
dialog.show();
dialog=null;
}

}