安卓学习UI组件-时间日期显示-TimePicker-DatePicker—TimePickerDialog-DatePickerDialog

基于API17的组件

一.TimePicker

<TimePicker
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/timePicker"

    android:layout_alignParentTop="true"
    android:layout_alignParentStart="true" />

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="保存"
    android:onClick="saveClick"
    android:id="@+id/button"
    android:layout_alignParentTop="true"
    android:layout_alignParentEnd="true" />

private TimePicker timePicker;

timePicker= (TimePicker) findViewById(R.id.timePicker);

public void saveClick(View v)
{
   int hour= timePicker.getCurrentHour();
    int minute=timePicker.getCurrentMinute();
    Toast.makeText(this,hour+":"+minute,Toast.LENGTH_SHORT).show();
}

二.TimePickerDialog

<TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="not time"
    android:id="@+id/textView_time" />

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="设置时间 "
    android:onClick="setTimeClick"
    android:id="@+id/button_setTime"
    android:layout_below="@+id/textView_time"
    android:layout_alignParentStart="true" />

（1）创建一个类TimePickerFragment extends DialogFragment implements TimePickerDialog.OnTimeSetListener

public  class TimePickerFragment extends DialogFragment implements TimePickerDialog.OnTimeSetListener{
int hour;
    int minute;
    private MainActivity mainActivity;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //通过getActivity方法获取该Fragment所依赖的Activity对象
        mainActivity=(MainActivity)getActivity();

    }

    @Override
    /*创建对话框的事件方法，该方法会在MainActivity的按钮事件中调用show方法时，会检查是否已经存在dialog
    * 当不存在时会触发该事件，否则直接显示
    * */
    //显示dialog时，自动调用onCreateDialog方法
    public Dialog onCreateDialog(Bundle savedInstanceState) {

        //获取当前的系统时间
        Calendar c=Calendar.getInstance();
       hour=c.get(Calendar.HOUR_OF_DAY);
         minute=c.get(Calendar.MINUTE);
        //第二个参数为事件 创建时间对话框，参数为（上下文，小时，分钟，是否为24小时）
TimePickerDialog dialog=new TimePickerDialog(getActivity(),this,hour,minute,true);

        return dialog;


    }

    @Override
    //确定调用这方法
    public void onTimeSet(TimePicker view, int hourOfDay, int minute) {

        this.hour=hourOfDay;
        this.minute=minute;
  mainActivity.setTimeValue(hour,minute);
    }
}

（2）在MainActivity中调用

public class MainActivity extends Activity {

    private TextView textView_time;




    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        textView_time=(TextView)findViewById(R.id.textView_time);
    }
    public void setTimeValue(int hour,int minute)
    {
        textView_time.setText(hour+":"+minute);
    }
    //按钮事件
    public  void setTimeClick(View view)
    {
        DialogFragment timePickerFragment=new TimePickerFragment();
        timePickerFragment.show(getFragmentManager(),"timePicker");
    }
}

三.DatePicker

<DatePicker
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/datePicker"
    android:layout_below="@+id/timePicker"
    android:layout_alignParentStart="true"
    android:calendarViewShown="false" //是否显示日历
    />

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="OK"
    android:onClick="saveClick1"
    android:id="@+id/button2"
    android:layout_below="@+id/datePicker"
    android:layout_alignParentStart="true" />

private DatePicker datePicker;

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

  public void saveClick1(View v)
  {
      int year=datePicker.getYear();
int month=datePicker.getMonth()+1;
      int day=datePicker.getDayOfMonth();

              Toast.makeText(this,year+":"+month+":"+day,Toast.LENGTH_SHORT).show();
  }

四.DatePickerDialog

<TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="not date"
    android:id="@+id/textView_date" />

<Button
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="设置日期 "
    android:onClick="setDateClick"
    android:id="@+id/button_setDate"
    android:layout_below="@+id/textView_date"
    android:layout_alignParentStart="true" />

（1）创建一个类DatePickerFragment继承 DialogFragment

public class DatePickerFragment extends DialogFragment implements DatePickerDialog.OnDateSetListener{

    private MainActivity2 mainActivity2;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
mainActivity2= (MainActivity2) getActivity();
    }

    @Override
    //用于创建日期对话框的事件
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        Calendar c=Calendar.getInstance();
        int year=c.get(Calendar.YEAR);
        int month=c.get(Calendar.MONTH);
int day=c.get(Calendar.DAY_OF_MONTH);

        DatePickerDialog dialog=new DatePickerDialog(getActivity(),this,year,month,day);


        return dialog;
    }

    @Override
    public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {

mainActivity2.setDateValue(year,monthOfYear,dayOfMonth);

    }
}

(2)在MainActivity中创建对象调用

public class MainActivity2 extends Activity {
private TextView textView_date;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
textView_date= (TextView) findViewById(R.id.textView_date);
    }

    /*设置日期的按钮事件 */
    public void setDateClick(View v)
    {
        DialogFragment dateDialogFragment=new DatePickerFragment();
        dateDialogFragment.show(getFragmentManager(),"datePicker");
    }
    public void setDateValue(int year,int month,int day)
    {
        textView_date.setText(year+"年"+(month+1)+"月"+day+"日");

    }
}