选择年月日控件YMDatePickerDialog

import android.content.Context;import android.content.DialogInterface;import android.content.res.Resources;import android.os.Build;import android.os.Bundle;import android.support.v7.app.AlertDialog;import android.view.LayoutInflater;import android.view.View;import android.widget.DatePicker;import com.example.win.newintern3.R;import java.lang.reflect.Field;/** * 只允许选择年月 * Created by TAO_SX on 2016/7/13/013. */public class YMDatePickerDialog extends AlertDialog implements DialogInterface.OnClickListener, DatePicker.OnDateChangedListener {    private static final String START_YEAR = "start_year";    private static final String START_MONTH = "start_month";    private static final String START_DAY = "start_day";    private final DatePicker mDatePickerStart;    private final OnDateSetListener mCallBack;    public interface OnDateSetListener {        void onDateSet(DatePicker startDatePicker, int startYear, int startMonthOfYear, int startDayOfMonth);    }    //showmd = 1;//1为显示年,0为只显示年月    public YMDatePickerDialog(Context context, int showmd, OnDateSetListener callBack, int year, int monthOfYear, int dayOfMonth) {        this(context,0, showmd, callBack, year, monthOfYear, dayOfMonth,0,0);    }    public YMDatePickerDialog(Context context, int showmd, OnDateSetListener callBack, int year, int monthOfYear, int dayOfMonth, Long min, Long max) {        this(context,0, showmd, callBack, year, monthOfYear, dayOfMonth,min,max);    }    public YMDatePickerDialog(Context context, int theme,                              int showmd, OnDateSetListener callBack,                              int year, int monthOfYear,                              int dayOfMonth, long min,                              long max) {        super(context, theme);        mCallBack = callBack;        Context themeContext = getContext();        setButton(BUTTON_POSITIVE, "确 定", this);        setButton(BUTTON_NEGATIVE, "取 消", this);        setIcon(0);        LayoutInflater inflater = (LayoutInflater) themeContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);        View view = inflater.inflate( R.layout.dialog_date_picker, null);        setView(view);        mDatePickerStart = (DatePicker) view.findViewById(R.id.datePickerStart);        if (min > 0) {            mDatePickerStart.setMinDate(min);        }        if (max > 0) {            mDatePickerStart.setMaxDate(max);        }        mDatePickerStart.init(year, monthOfYear, dayOfMonth, this);        switch (showmd) {            case 1:                hideMonth(mDatePickerStart);            case 0:                hideDay(mDatePickerStart);                break;            default:                break;        }    }    private void hideDay(DatePicker mDatePicker) {        try {            /* 处理android5.0以上的特殊情况 */            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {                int daySpinnerId = Resources.getSystem().getIdentifier("day", "id", "android");                if (daySpinnerId != 0) {                    View daySpinner = mDatePicker.findViewById(daySpinnerId);                    if (daySpinner != null) {                        daySpinner.setVisibility(View.GONE);                    }                }            } else {                Field[] datePickerfFields = mDatePicker.getClass().getDeclaredFields();                for (Field datePickerField : datePickerfFields) {                    if ("mDaySpinner".equals(datePickerField.getName()) || ("mDayPicker").equals(datePickerField.getName())) {                        datePickerField.setAccessible(true);                        Object dayPicker = new Object();                        try {                            dayPicker = datePickerField.get(mDatePicker);                        } catch (IllegalAccessException e) {                            e.printStackTrace();                        } catch (IllegalArgumentException e) {                            e.printStackTrace();                        }                        ((View) dayPicker).setVisibility(View.GONE);                    }                }            }        } catch (Exception e) {            e.printStackTrace();        }    }    private void hideMonth(DatePicker mDatePicker) {        try {            /* 处理android5.0以上的特殊情况 */            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {                int monthSpinnerId = Resources.getSystem().getIdentifier("month", "id", "android");                if (monthSpinnerId != 0) {                    View monthSpinner = mDatePicker.findViewById(monthSpinnerId);                    if (monthSpinner != null) {                        monthSpinner.setVisibility(View.GONE);                    }                }            } else {                Field[] datePickerfFields = mDatePicker.getClass().getDeclaredFields();                for (Field datePickerField : datePickerfFields) {                    if ("mMonthSpinner".equals(datePickerField.getName()) || ("mMonthPicker").equals(datePickerField.getName())) {                        datePickerField.setAccessible(true);                        Object monthPicker = new Object();                        try {                            monthPicker = datePickerField.get(mDatePicker);                        } catch (IllegalAccessException e) {                            e.printStackTrace();                        } catch (IllegalArgumentException e) {                            e.printStackTrace();                        }                        ((View) monthPicker).setVisibility(View.GONE);                    }                }            }        } catch (Exception e) {            e.printStackTrace();        }    }    public void onClick(DialogInterface dialog, int which) {        if (which == BUTTON_POSITIVE)            tryNotifyDateSet();    }    @Override    public void onDateChanged(DatePicker view, int year, int month, int day) {        if (view.getId() == R.id.datePickerStart)            mDatePickerStart.init(year, month, day, this);    }    public DatePicker getDatePickerStart() {        return mDatePickerStart;    }    public void updateStartDate(int year, int monthOfYear, int dayOfMonth) {        mDatePickerStart.updateDate(year, monthOfYear, dayOfMonth);    }    private void tryNotifyDateSet() {        if (mCallBack != null) {            mDatePickerStart.clearFocus();            mCallBack.onDateSet(mDatePickerStart, mDatePickerStart.getYear(), mDatePickerStart.getMonth(),                    mDatePickerStart.getDayOfMonth());        }    }    @Override    protected void onStop() {        super.onStop();    }    @Override    public Bundle onSaveInstanceState() {        Bundle state = super.onSaveInstanceState();        state.putInt(START_YEAR, mDatePickerStart.getYear());        state.putInt(START_MONTH, mDatePickerStart.getMonth());        state.putInt(START_DAY, mDatePickerStart.getDayOfMonth());        return state;    }    @Override    public void onRestoreInstanceState(Bundle savedInstanceState) {        super.onRestoreInstanceState(savedInstanceState);        int start_year = savedInstanceState.getInt(START_YEAR);        int start_month = savedInstanceState.getInt(START_MONTH);        int start_day = savedInstanceState.getInt(START_DAY);        mDatePickerStart.init(start_year, start_month, start_day, this);    }}