Android-DatePicker和TimePicker的简单

系统提供的DatePicker和TimePicker的两种控件用法雷同，前者选择日期，后者选择时间，很多时候也可以结合使用。基础用法如下：

    //创建的方法
    protected void onCreate(Bundle savedInstanceState) {


       Calendar c = Calendar.getInstance();
       mYear = c.get(Calendar.YEAR);
       mMonth = c.get(Calendar.MONTH);
       mDay = c.get(Calendar.DAY_OF_MONTH);
       mHourr = c.get(Calendar.HOUR_OF_DAY);
       mMins = c.get(Calendar.MINUTE);
       updateDisplay();


       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);


       tv02 = (TextView) findViewById(R.id.tv02);

       datePicker = (DatePicker) findViewById(R.id.datepicker);

       datePicker.init(mYear, mMonth, mDay, new DatePicker.OnDateChangedListener() {
           @Override
           public void onDateChanged(DatePicker datePicker, int i, int i1, int i2) {

               mYear = i;
               mMonth = i1;
               mDay = i2;

               //选择操作执行之后会更改显示内容
               updateDisplay();
           }
       });


       //取得Timepicker对象 并设置24小时时间格式
       timePicker = (TimePicker) findViewById(R.id.timepicker);

       timePicker.setIs24HourView(true);

       timePicker.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() {
           @Override
           public void onTimeChanged(TimePicker timePicker, int i, int i1) {

               mHourr  = i;
               mMins = i1;

               //选择操作执行之后会更改显示内容
               updateDisplay();
           }
       });
   }


   //设置显示日期时间的方法
    public void updateDisplay(){

       tv02.setText(new StringBuffer().append(mYear).append("/").append(format(mMonth+1)).append("/").append(format(mDay)).append("  ").append(format(mHourr)).append(":").append(format(mMins)));

    }


    //日期和时间显示两位数的方法
    private String format(int x){

        String s = "" + x;
        if (s.length() == 1)
            s = "0" + s;
        return s;
    }
}