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import java.text.DateFormat;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.Calendar;

import android.app.Activity;

import android.app.AlertDialog;

import android.content.DialogInterface;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

public class MainActivity extends Activity {

	WheelMain wheelMain;

	EditText txttime;

	DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");

	@Override

	public void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		setContentView(R.layout.main);

		txttime = (EditText) findViewById(R.id.txttime);

		Calendar calendar = Calendar.getInstance();

		txttime.setText(calendar.get(Calendar.YEAR) + "-"

				+ (calendar.get(Calendar.MONTH) + 1) + "-"

				+ calendar.get(Calendar.DAY_OF_MONTH) + "");

		Button btnselecttime = (Button) findViewById(R.id.button1);

		btnselecttime.setOnClickListener(new OnClickListener() {

			@Override

			public void onClick(View arg0) {

				LayoutInflater inflater = LayoutInflater

						.from(MainActivity.this);

				final View timepickerview = inflater.inflate(

						R.layout.timepicker, null);

				ScreenInfo screenInfo = new ScreenInfo(MainActivity.this);

				wheelMain = new WheelMain(timepickerview, true);

				wheelMain.screenheight = screenInfo.getHeight();

				String time = txttime.getText().toString();

				Calendar calendar = Calendar.getInstance();

				if (JudgeDate.isDate(time, "yyyy-MM-dd")) {

					try {

						calendar.setTime(dateFormat.parse(time));

					} catch (ParseException e) {

						// TODO Auto-generated catch block

						e.printStackTrace();

					}

				}

				int year = calendar.get(Calendar.YEAR);

				int month = calendar.get(Calendar.MONTH);

				int day = calendar.get(Calendar.DAY_OF_MONTH);

				int h = calendar.getTime().getHours();

				int m = calendar.getTime().getMinutes();

				wheelMain.initDateTimePicker(year, month, day, h, m);

				new AlertDialog.Builder(MainActivity.this)

						.setTitle("选择时间")

						.setView(timepickerview)

						.setPositiveButton("确定",

								new DialogInterface.OnClickListener() {

									@Override

									public void onClick(DialogInterface dialog,

											int which) {

										txttime.setText(wheelMain.getTime());

									}

								})

						.setNegativeButton("取消",

								new DialogInterface.OnClickListener() {

									@Override

									public void onClick(DialogInterface dialog,

											int which) {

									}

								}).show();

			}

		});

	}

}

源代码