android *** TimePickerDialog && DatePickerDialog

package com.example.tree;

import android.support.v7.app.ActionBarActivity;
import android.text.Html;
import android.text.Spanned;
import android.text.method.LinkMovementMethod;
import android.util.Log;

import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;

import android.app.AlertDialog;
import android.app.DatePickerDialog;
import android.app.DatePickerDialog.OnDateSetListener;
import android.app.ProgressDialog;
import android.app.TimePickerDialog;
import android.app.TimePickerDialog.OnTimeSetListener;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.drawable.Drawable;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.*;
import android.view.View.OnClickListener;
import android.view.View.OnKeyListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.AnalogClock;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.RatingBar;
import android.widget.RatingBar.OnRatingBarChangeListener;
import android.widget.ScrollView;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.TimePicker;
import android.widget.TimePicker.OnTimeChangedListener;
import android.widget.Toast;

public class MainActivity extends ActionBarActivity {

private Button button;
private Button button2;
private EditText editText;
private DatePickerDialog dialog;
private TimePickerDialog dialog2;
private int year,monthOfYear,dayOfMonth,hourOfDay,minute;
private final String TAG="MainActivity";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Log.i(TAG, "-onCreate-->>");
button=(Button)this.findViewById(R.id.button1);
button2=(Button)this.findViewById(R.id.button2);
editText=(EditText)this.findViewById(R.id.editText1);
Calendar cal=Calendar.getInstance();
year=cal.get(Calendar.YEAR);
monthOfYear=cal.get(Calendar.MONTH);
dayOfMonth=cal.get(Calendar.DAY_OF_MONTH);
hourOfDay=cal.get(Calendar.HOUR_OF_DAY);
minute=cal.get(Calendar.MINUTE);
dialog=new DatePickerDialog(MainActivity.this, new OnDateSetListener(){

@Override
public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
// TODO Auto-generated method stub
String text=year+"-"+(monthOfYear+1)+"-"+dayOfMonth;
editText.setText(text);
}

}, year,monthOfYear,dayOfMonth);
button.setOnClickListener(new OnClickListener(){

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
dialog.show();
}

});
dialog2=new TimePickerDialog(MainActivity.this, new OnTimeSetListener(){

@Override
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
// TODO Auto-generated method stub
Log.i(TAG, hourOfDay+":"+minute);
}

}, hourOfDay,minute,true);
button2.setOnClickListener(new OnClickListener(){

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
dialog2.show();
}

});
}

protected void onStart(){
super.onStart();
Log.i(TAG, "-onStart-->>");
}

protected void onRestart(){
super.onRestart();
Log.i(TAG, "-onRestart-->>");
}

protected void onResume(){
super.onResume();
Log.i(TAG, "-onResume-->>");
}

protected void onPause(){
super.onPause();
Log.i(TAG, "-onPause-->>");
}

protected void onStop(){
super.onStop();
Log.i(TAG, "-onStop-->>");
}

protected void onDestroy(){
super.onDestroy();
Log.i(TAG, "-onDestroy-->>");
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:android1="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="${relativePackage}.${activityClass}" >

<Button
android1:id="@+id/button1"
android1:layout_width="wrap_content"
android1:layout_height="wrap_content"
android1:layout_alignParentTop="true"
android1:layout_centerHorizontal="true"
android1:layout_marginTop="62dp"
android1:text="日期对话框" />

<Button
android1:id="@+id/button2"
android1:layout_width="wrap_content"
android1:layout_height="wrap_content"
android1:layout_below="@+id/button1"
android1:layout_centerHorizontal="true"
android1:layout_marginTop="31dp"
android1:text="时间对话框" />

<EditText
android1:id="@+id/editText1"
android1:layout_width="wrap_content"
android1:layout_height="wrap_content"
android1:layout_alignParentTop="true"
android1:layout_alignRight="@+id/button1"
android1:layout_marginRight="25dp"
android1:ems="10" >

<requestFocus />
</EditText>

</RelativeLayout>