时间日期控件

AnalogClock、DigitalClock 模拟时钟与数字时钟

时钟控件包括AnalogClock和DigitalClock，它们都负责显示时钟，所不同的是AnalogClock控件显示模拟时钟，且只显示时针和分针，而DigitalClock显示数字时钟，可精确到秒

以下模拟时钟的用法

目录结构

布局文件

<?xml version="1.0" encoding="utf-8"?>
<!-- AnalogClock与DigitalClock这两个时钟控件都不需要Java代码，
只要在layout的xml里插入以下代码即可自动显示时间-->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <!-- 模拟时钟控件 -->
    <AnalogClock android:id="@+id/analogClock"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"/>
    <!-- 数字时钟控件 -->
    <DigitalClock android:id="@+id/digitalClock"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"/>
</LinearLayout>

运行结果

 

TimePicker与DatePicker  时间选择器与日期选择器

 

public class MainActivity extends Activity {
    
    private int year;
    private int month;
    private int day;
    private int hour;
    private int minute;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        TimePicker timepicker=(TimePicker) findViewById(id.timePicker1);
        DatePicker datepicker=(DatePicker) findViewById(id.datePicker1);
        timepicker.setIs24HourView(true);
        Calendar calendar=Calendar.getInstance();//获取当前时间的对象
        year = calendar.get(Calendar.YEAR);
        month = calendar.get(Calendar.MONTH);
        day = calendar.get(Calendar.DAY_OF_MONTH);
        hour = calendar.get(Calendar.HOUR_OF_DAY);
        minute = calendar.get(Calendar.MINUTE);
        //为日期初始化 并设置改变监听器
        datepicker.init(year, month, day, new OnDateChangedListener() {
            
            @Override//日期改变监听
            public void onDateChanged(DatePicker view, int year, int monthOfYear,
                    int dayOfMonth) {
                 MainActivity.this.year=year;//得到改变后的值
                 MainActivity.this.month=monthOfYear;
                 MainActivity.this.day=dayOfMonth;
                 show(year,monthOfYear,dayOfMonth,hour,minute);
            }
        });
        //为时间设置监听器
        timepicker.setOnTimeChangedListener(new OnTimeChangedListener() {
            
            @Override
            public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
                 MainActivity.this.hour=hourOfDay;
                 MainActivity.this.minute=minute;
                 show(year,month,day,hourOfDay,minute);
            }
        });
    }
    //定义方法显示
    private void show(int year,int month,int day,int hour,int minute){
        String str=year+"年"+(month+1)+"月"+day+"日"+hour+"："+minute;
        Toast.makeText(this, str,0).show();
    }
}

布局文件：

<RelativeLayout 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">

    <TimePicker
        android:id="@+id/timePicker1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true" />

    <DatePicker
        android:id="@+id/datePicker1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/timePicker1"
        android:layout_marginTop="20dp" />
  
</RelativeLayout>

 

效果如图：

 

 

TimePickerDialog与DatePickerDialog  时间选择对话框与日期选择对话框

 

public class MainActivity2 extends Activity {
    
    private int year;
    private int month;
    private int day;
    private int hour;
    private int minute;
    private TextView tv;
    private TextView tv2;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        tv = (TextView) findViewById(id.textView1);
        tv2 = (TextView) findViewById(id.textView2);
    }
    public void button_onClick(View view){//按钮单击
        Calendar c=Calendar.getInstance();
        hour=c.get(Calendar.HOUR_OF_DAY);
        minute=c.get(Calendar.MINUTE);
        //时间对话框
        TimePickerDialog dialog=new TimePickerDialog(this, new OnTimeSetListener() {
            
            @Override
            public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                tv.setText(hourOfDay +":" +minute);
            }
        }, hour, minute,true);
        dialog.show();
    }
    
    public void button_onClick2(View view){//按钮单击
        Calendar c=Calendar.getInstance();
        year=c.get(Calendar.YEAR);
        month=c.get(Calendar.MONTH);
        day=c.get(Calendar.DAY_OF_MONTH);
        DatePickerDialog ap=new DatePickerDialog(this,new OnDateSetListener() {
            //日期对话框
            @Override
            public void onDateSet(DatePicker view, int year, int monthOfYear,
                    int dayOfMonth) {
                tv2.setText(year+"年"+(monthOfYear+1)+"月"+dayOfMonth+"日");
            }
        }, year, month, day);
        ap.show();
    }
}

布局只需要按钮显示文本

效果如图：