Android 7.0下仿7.0之前的时间框及去掉日选择框方法

Posted 2022-11-01 离氺的鱼

package com.bonc.mobile.common.view;

import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.util.Calendar;

import android.annotation.SuppressLint;
import android.app.DatePickerDialog;
import android.content.Context;
import android.os.Build;
import android.text.format.DateUtils;
import android.util.AttributeSet;
import android.view.ContextThemeWrapper;
import android.view.View;
import android.view.ViewGroup;
import android.widget.DatePicker;

public class FixedHoloDatePickerDialog extends DatePickerDialog 

    DatePicker datePicker;
    final Context context;
    private final Calendar mCalendar;

    @SuppressLint("NewApi")
    public FixedHoloDatePickerDialog(Context context,
                                     OnDateSetListener callBack, int year, int monthOfYear,
                                     int dayOfMonth) 
        super(context, callBack, year, monthOfYear, dayOfMonth);

        this.context = context;
        mCalendar = Calendar.getInstance();
        // Force spinners on Android 7.0 only (SDK 24).
        // Note: I'm using a naked SDK value of 24 here, because I'm
        // targeting SDK 23, and Build.VERSION_CODES.N is not available yet.
        // But if you target SDK >= 24, you should have it.
     if (Build.VERSION.SDK_INT >= 24) 
        try 
            final Field field = this.findField(DatePickerDialog.class,
                    DatePicker.class, "mDatePicker");

            datePicker = (DatePicker) field.get(this);
            final Class<?> delegateClass = Class
                    .forName("android.widget.DatePicker$DatePickerDelegate");
            final Field delegateField = this.findField(DatePicker.class,
                    delegateClass, "mDelegate");

            final Object delegate = delegateField.get(datePicker);
            final Class<?> spinnerDelegateClass = Class
                    .forName("android.widget.DatePickerSpinnerDelegate");

            if (delegate.getClass() != spinnerDelegateClass) 
                delegateField.set(datePicker, null);
                datePicker.removeAllViews();

                final Constructor spinnerDelegateConstructor = spinnerDelegateClass
                        .getDeclaredConstructor(DatePicker.class,
                                Context.class, AttributeSet.class,
                                int.class, int.class);
                spinnerDelegateConstructor.setAccessible(true);

                final Object spinnerDelegate = spinnerDelegateConstructor
                        .newInstance(datePicker, context, null,
                                android.R.attr.datePickerStyle, 0);
                delegateField.set(datePicker, spinnerDelegate);

                datePicker.init(year, monthOfYear, dayOfMonth, this);
                datePicker.setCalendarViewShown(false);
                datePicker.setSpinnersShown(true);
            
         catch (Exception e)  /* Do nothing */
        
        else 
           datePicker = new DatePicker(context);
       
    

    @Override
    public void onDateChanged(DatePicker view, int year, int month, int day) 
        super.onDateChanged(view, year, month, day);
        mCalendar.set(Calendar.YEAR, year);
        mCalendar.set(Calendar.MONTH, month);
        mCalendar.set(Calendar.DAY_OF_MONTH, day);
        String title = DateUtils.formatDateTime(context,
                mCalendar.getTimeInMillis(),
                DateUtils.FORMAT_SHOW_DATE
                        | DateUtils.FORMAT_SHOW_WEEKDAY
                        | DateUtils.FORMAT_SHOW_YEAR
                        | DateUtils.FORMAT_ABBREV_MONTH
                        | DateUtils.FORMAT_ABBREV_WEEKDAY);
        if (hasNoDay)
            title = year + "年" + (month + 1) + "月";

        this.setTitle(title);
    

    /**
     * Find Field with expectedName in objectClass. If not found, find first
     * occurrence of target fieldClass in objectClass.
     */
    private Field findField(Class objectClass, Class fieldClass,
                            String expectedName) 
        try 
            final Field field = objectClass.getDeclaredField(expectedName);
            field.setAccessible(true);
            return field;
         catch (NoSuchFieldException e)  /* Ignore */
        

        // Search for it if it wasn't found under the expectedName.
        for (final Field field : objectClass.getDeclaredFields()) 
            if (field.getType() == fieldClass) 
                field.setAccessible(true);
                return field;
            
        

        return null;
    

    boolean hasNoDay;

    public void setHasNoDay(boolean bol) 

        hasNoDay = bol;

        if (hasNoDay)

            try 
                ((ViewGroup) ((ViewGroup) datePicker.getChildAt(0))
                        .getChildAt(0)).getChildAt(2).setVisibility(
                        View.GONE);
             catch (Exception e) 
                e.printStackTrace();
            
    

    public boolean isHasNoDay() 
        return hasNoDay;
    


使用方法：
   FixedHoloDatePickerDialog datePicker = new FixedHoloDatePickerDialog(context, callBack
                , calendar.get(Calendar.YEAR), calendar
                .get(Calendar.MONTH), calendar
                .get(Calendar.DAY_OF_MONTH)); //上下文，点击回调,Calendar年月日

        datePicker.show();

 补充：
 修改样式代码(具体的样式需要自定义)
   Context themed = new ContextThemeWrapper(context,
                    android.R.style.Theme_Holo_Light_Dialog);

           Dialog mDateDia = new FixedHoloDatePickerDialog(themed,
                    listener, calendar.get(Calendar.YEAR),
                    calendar.get(Calendar.MONTH),
                    calendar.get(Calendar.DAY_OF_MONTH));
其他部分无异。