android开发_TimePicker控件

新建项目：

New Android Project->
Project name:HelloSpinner
Build Target:Android 2.2
Application name:HelloSpinner
Package name:com.b510
Create Activity:MainActivity
Min SDK Version:9
Finish

运行效果：

如果：    return new TimePickerDialog(this, mTimeSetListener, mHour, mMinute,
                    false);

代码部分：

MainActivity.java

package com.b510;

import java.util.Calendar;

import android.app.Activity;
import android.app.Dialog;
import android.app.TimePickerDialog;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.TimePicker;

public class HelloTimePicker extends Activity {
    /* 显示时间信息 */
    private TextView tvTimePickerDisplay;
    /* 设置时间按钮 */
    private Button btnTimePicker;
    /* 小时 */
    private int mHour;
    /* 分钟 */
    private int mMinute;
    /* 标识 dialog的id */
    static final int TIME_DIALOG_ID = 0;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        this.tvTimePickerDisplay = (TextView) this
                .findViewById(R.id.tv_timepicker_display);
        this.btnTimePicker = (Button) findViewById(R.id.btn_timepicker);
        btnTimePicker.setOnClickListener(listener);

        // get the current time
        final Calendar c = Calendar.getInstance();
        mHour = c.get(Calendar.HOUR_OF_DAY);
        mMinute = c.get(Calendar.MINUTE);

        // display the current date
        updateDisplay();
    }

    private OnClickListener listener = new OnClickListener() {
        @Override
        public void onClick(View v) {
            showDialog(TIME_DIALOG_ID);
        }
    };

    // updates the time we display in the TextView
    private void updateDisplay() {
        tvTimePickerDisplay.setText(new StringBuilder().append(pad(mHour)).append(":")
                .append(pad(mMinute)));
    }

    private static String pad(int c) {
        if (c >= 10)
            return String.valueOf(c);
        else
            return "0" + String.valueOf(c);
    }

    // the callback received when the user "sets" the time in the dialog
    private TimePickerDialog.OnTimeSetListener mTimeSetListener = new TimePickerDialog.OnTimeSetListener() {
        public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
            mHour = hourOfDay;
            mMinute = minute;
            updateDisplay();
        }
    };

    @Override
    protected Dialog onCreateDialog(int id) {
        switch (id) {
        case TIME_DIALOG_ID:
            return new TimePickerDialog(this, mTimeSetListener, mHour, mMinute,
                    true);
        }
        return null;
    }
}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <TextView  
        android:id="@+id/tv_timepicker_display"
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        />
     <Button
         android:id="@+id/btn_timepicker"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:text="Change the time"
     />
</LinearLayout>