Android 的 DatePicker、TimePicker或NumberPicker

<LinearLayout 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:descendantFocusability="blocksDescendants"
    android:orientation="vertical"
    tools:context="com.example.googlenumberpicker.MainActivity" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="horizontal" >

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:orientation="vertical" >

            <NumberPicker
                android:id="@+id/np_date"
                android:layout_width="match_parent"
                android:layout_height="wrap_content" />
        </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:orientation="vertical" >

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="horizontal" >

                <NumberPicker
                    android:id="@+id/np_hour"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_weight="1" />

                <NumberPicker
                    android:id="@+id/np_minute"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_weight="1" >
                </NumberPicker>
            </LinearLayout>
        </LinearLayout>
    </LinearLayout>

</LinearLayout>

import java.util.Calendar;

import android.app.Activity;
import android.os.Bundle;
import android.widget.NumberPicker;
import android.widget.NumberPicker.Formatter;
import android.widget.NumberPicker.OnScrollListener;
import android.widget.NumberPicker.OnValueChangeListener;

public class MainActivity extends Activity implements OnValueChangeListener, OnScrollListener, Formatter
{
    int year;
    int month;
    int day;
    int hour;
    int minute;
    String[] dates;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Calendar c = Calendar.getInstance();
        year = c.get(Calendar.YEAR);
        month = c.get(Calendar.MONTH);
        day = c.get(Calendar.DAY_OF_MONTH);
        hour = c.get(Calendar.HOUR);
        minute = c.get(Calendar.MINUTE);
        this.initDates();
        this.init();
    }

    private void initDates() {
        Calendar c = Calendar.getInstance();
        c.setFirstDayOfWeek(Calendar.SUNDAY);
        c.set(year, 0, 1);
        dates = new String[c.getActualMaximum(Calendar.DAY_OF_YEAR)];
        for (int i = 0; i < dates.length; i++) {
            dates[i] = this.format((c.get(Calendar.MONTH)+1)) + "-" + this.format(c.get(Calendar.DAY_OF_MONTH));
            c.roll(Calendar.DAY_OF_YEAR, true);
        }
    }

    private void init() {
        NumberPicker np_date = (NumberPicker) this.findViewById(R.id.np_date);
        NumberPicker np_hour = (NumberPicker) this.findViewById(R.id.np_hour);
        NumberPicker np_minute = (NumberPicker) this.findViewById(R.id.np_minute);
        
        np_date.setFormatter(this);
        np_date.setOnScrollListener(this);
        np_date.setOnValueChangedListener(this);
        np_date.setDisplayedValues(dates);
        np_date.setMaxValue(dates.length - 1);
        np_date.setValue(Calendar.getInstance().get(Calendar.DAY_OF_YEAR)-1);
        
        np_hour.setFormatter(this);
        np_hour.setOnScrollListener(this);
        np_hour.setOnValueChangedListener(this);
        np_hour.setMaxValue(23);
        np_hour.setMinValue(0);
        np_hour.setValue(hour);
        
        np_minute.setFormatter(this);
        np_minute.setOnScrollListener(this);
        np_minute.setOnValueChangedListener(this);
        np_minute.setMaxValue(59);
        np_minute.setMinValue(0);
        np_minute.setValue(minute);
    }

    @Override
    public String format(int value) {
        String tmpStr = String .valueOf(value);
        if (value < 10) {
            tmpStr = "0" + tmpStr;
        }
        return tmpStr;
    }

    @Override
    public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
//        Toast.makeText(MainActivity.this, oldVal + "变成" + newVal , 0).show();
    }

    @Override
    public void onScrollStateChange(NumberPicker view, int scrollState) {
        /*switch (scrollState) {
        case OnScrollListener.SCROLL_STATE_FLING:
            Toast.makeText(MainActivity.this, "后续滑动..." , 0).show();
            break;
        case OnScrollListener.SCROLL_STATE_IDLE:
            Toast.makeText(MainActivity.this, "不滑动" , 0).show();
            break;
        case OnScrollListener.SCROLL_STATE_TOUCH_SCROLL:
            Toast.makeText(MainActivity.this, "滑动中" , 0).show();
            break;

        default:
            break;
        }*/
    }

}