<Button android:id="@+id/details_date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:background="@android:drawable/edit_text" /><!--将Button的背景改为EditText的背景-->

package com.manning.androidhacks.hack009;import java.util.Calendar;import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.DatePickerDialog.OnDateSetListener;
import android.app.Dialog;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.DatePicker;public class MainActivity extends Activity {private static final int DATE_DIALOG_ID = 0;private int mYear;private int mMonth;private int mDay;private OnDateSetListener mDateSetListener;private Button mDateButton;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);// get the current datefinal Calendar c = Calendar.getInstance();mYear = c.get(Calendar.YEAR);mMonth = c.get(Calendar.MONTH);mDay = c.get(Calendar.DAY_OF_MONTH);mDateSetListener = new DatePickerDialog.OnDateSetListener() {@Overridepublic void onDateSet(DatePicker view, int year, int monthOfYear,int dayOfMonth) {mDateButton.setText(getString(R.string.picked_date_format,monthOfYear + 1, dayOfMonth, year));}};mDateButton = (Button) findViewById(R.id.details_date);mDateButton.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {showDialog(DATE_DIALOG_ID);}});}@Overrideprotected Dialog onCreateDialog(int id) {switch (id) {case DATE_DIALOG_ID:return new DatePickerDialog(this, mDateSetListener, mYear,mMonth - 1, mDay);}return super.onCreateDialog(id);}}