如何在Android中實現自定義日曆？

Question

我想製作一個自定義日曆，以便我可以輕鬆地添加或刪除事件。任何人都可以爲我提供代碼如何實現它。

我提供一個鏈接： - 樣，我想加時賽做的日曆

https://play.google.com/store/apps/details?id=jp.co.johospace.jorte&feature=search_result#?t=W251bGwsMSwxLDEsImpwLmNvLmpvaG9zcGFjZS5qb3J0ZSJd

Answer 1

你應該尋找足夠的並表現出一定的努力。 這裏是一個你可以嘗試

package com.examples; 

import java.util.ArrayList; 
import java.util.Calendar; 
import java.util.GregorianCalendar; 
import java.util.List; 
import java.util.Locale; 

import android.app.Activity; 
import android.content.Context; 
import android.content.Intent; 
import android.graphics.Color; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.view.View.OnClickListener; 
import android.widget.BaseAdapter; 
import android.widget.Button; 
import android.widget.GridView; 
import android.widget.ImageView; 
import android.widget.Toast; 

public class Main extends Activity implements OnClickListener 
    { 
     private static final String tag = "Main"; 
     private Button selectedDayMonthYearButton; 
     private Button currentMonth; 
     private ImageView prevMonth; 
     private ImageView nextMonth; 
     private GridView calendarView; 
     private GridCellAdapter adapter; 
     private Calendar _calendar; 
     private int month, year; 

     private void getRequestParameters() 
      { 
       Intent intent = getIntent(); 
       if (intent != null) 
        { 
         Bundle extras = intent.getExtras(); 
         if (extras != null) 
          { 
           if (extras != null) 
            { 
             Log.d(tag, "+++++----------------->" + extras.getString("params")); 
            } 
          } 
        } 
      } 

     /** Called when the activity is first created. */ 
     @Override 
     public void onCreate(Bundle savedInstanceState) 
      { 
       super.onCreate(savedInstanceState); 
       setContentView(R.layout.main); 

       _calendar = Calendar.getInstance(Locale.getDefault()); 
       month = _calendar.get(Calendar.MONTH); 
       year = _calendar.get(Calendar.YEAR); 

       selectedDayMonthYearButton = (Button) this.findViewById(R.id.selectedDayMonthYear); 

       prevMonth = (ImageView) this.findViewById(R.id.prevMonth); 
       prevMonth.setOnClickListener(this); 

       currentMonth = (Button) this.findViewById(R.id.currentMonth); 
       currentMonth.setText(_calendar.getTime().toString()); 

       nextMonth = (ImageView) this.findViewById(R.id.nextMonth); 
       nextMonth.setOnClickListener(this); 

       calendarView = (GridView) this.findViewById(R.id.calendar); 

       // Initialised 
       adapter = new GridCellAdapter(getApplicationContext(), R.id.gridcell, month, year); 
       adapter.notifyDataSetChanged(); 
       calendarView.setAdapter(adapter); 

      } 

     @Override 
     public void onClick(View v) 
      { 
       if (v == prevMonth) 
        { 
         if (month <= 1) 
          { 
           month = 11; 
           year--; 
          } else 
          { 
           month--; 
          } 

         Log.d(tag, "Before 1 MONTH " + "Month: " + month + " " + "Year: " + year); 
         adapter = new GridCellAdapter(getApplicationContext(), R.id.gridcell, month, year); 
         _calendar.set(year, month, _calendar.get(Calendar.DAY_OF_MONTH)); 
         currentMonth.setText(_calendar.getTime().toString()); 

         adapter.notifyDataSetChanged(); 
         calendarView.setAdapter(adapter); 
        } 
       if (v == nextMonth) 
        { 
         if (month >= 11) 
          { 
           month = 0; 
           year++; 
          } else 
          { 
           month++; 
          } 

         Log.d(tag, "After 1 MONTH " + "Month: " + month + " " + "Year: " + year); 
         adapter = new GridCellAdapter(getApplicationContext(), R.id.gridcell, month, year); 
         _calendar.set(year, month, _calendar.get(Calendar.DAY_OF_MONTH)); 
         currentMonth.setText(_calendar.getTime().toString()); 
         adapter.notifyDataSetChanged(); 
         calendarView.setAdapter(adapter); 
        } 
      } 

     // 
     public class GridCellAdapter extends BaseAdapter implements OnClickListener 
      { 
       private static final String tag = "GridCellAdapter"; 
       private final Context _context; 
       private final List<String> list; 
       private final String[] weekdays = new String[] { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" }; 
       private final String[] months = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" }; 
       private final int[] daysOfMonth = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; 
       private final int month, year; 
       int daysInMonth, prevMonthDays; 
       private final int currentDayOfMonth; 
       private Button gridcell; 

       // Days in Current Month 
       public GridCellAdapter(Context context, int textViewResourceId, int month, int year) 
        { 
         super(); 
         this._context = context; 
         this.list = new ArrayList<String>(); 
         this.month = month; 
         this.year = year; 

         Log.d(tag, "Month: " + month + " " + "Year: " + year); 
         Calendar calendar = Calendar.getInstance(); 
         currentDayOfMonth = calendar.get(Calendar.DAY_OF_MONTH); 

         printMonth(month, year); 
        } 

       public String getItem(int position) 
        { 
         return list.get(position); 
        } 

       @Override 
       public int getCount() 
        { 
         return list.size(); 
        } 

       private void printMonth(int mm, int yy) 
        { 
         // The number of days to leave blank at 
         // the start of this month. 
         int trailingSpaces = 0; 
         int leadSpaces = 0; 
         int daysInPrevMonth = 0; 
         int prevMonth = 0; 
         int prevYear = 0; 
         int nextMonth = 0; 
         int nextYear = 0; 

         GregorianCalendar cal = new GregorianCalendar(yy, mm, currentDayOfMonth); 

         // Days in Current Month 
         daysInMonth = daysOfMonth[mm]; 
         int currentMonth = mm; 
         if (currentMonth == 11) 
          { 
           prevMonth = 10; 
           daysInPrevMonth = daysOfMonth[prevMonth]; 
           nextMonth = 0; 
           prevYear = yy; 
           nextYear = yy + 1; 
          } else if (currentMonth == 0) 
          { 
           prevMonth = 11; 
           prevYear = yy - 1; 
           nextYear = yy; 
           daysInPrevMonth = daysOfMonth[prevMonth]; 
           nextMonth = 1; 
          } else 
          { 
           prevMonth = currentMonth - 1; 
           nextMonth = currentMonth + 1; 
           nextYear = yy; 
           prevYear = yy; 
           daysInPrevMonth = daysOfMonth[prevMonth]; 
          } 

         // Compute how much to leave before before the first day of the 
         // month. 
         // getDay() returns 0 for Sunday. 
         trailingSpaces = cal.get(Calendar.DAY_OF_WEEK) - 1; 

         if (cal.isLeapYear(cal.get(Calendar.YEAR)) && mm == 1) 
          { 
           ++daysInMonth; 
          } 

         // Trailing Month days 
         for (int i = 0; i < trailingSpaces; i++) 
          { 
           list.add(String.valueOf((daysInPrevMonth - trailingSpaces + 1) + i) + "-GREY" + "-" + months[prevMonth] + "-" + prevYear); 
          } 

         // Current Month Days 
         for (int i = 1; i <= daysInMonth; i++) 
          { 
           list.add(String.valueOf(i) + "-WHITE" + "-" + months[mm] + "-" + yy); 
          } 

         // Leading Month days 
         for (int i = 0; i < list.size() % 7; i++) 
          { 
           Log.d(tag, "NEXT MONTH:= " + months[nextMonth]); 
           list.add(String.valueOf(i + 1) + "-GREY" + "-" + months[nextMonth] + "-" + nextYear); 
          } 
        } 

       @Override 
       public long getItemId(int position) 
        { 
         return position; 
        } 

       @Override 
       public View getView(int position, View convertView, ViewGroup parent) 
        { 
         Log.d(tag, "getView ..."); 
         View row = convertView; 
         if (row == null) 
          { 
           // ROW INFLATION 
           Log.d(tag, "Starting XML Row Inflation ... "); 
           LayoutInflater inflater = (LayoutInflater) _context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
           row = inflater.inflate(R.layout.gridcell, parent, false); 

           Log.d(tag, "Successfully completed XML Row Inflation!"); 
          } 

         gridcell = (Button) row.findViewById(R.id.gridcell); 
         gridcell.setOnClickListener(this); 

         // ACCOUNT FOR SPACING 

         Log.d(tag, "Current Day: " + currentDayOfMonth); 
         String[] day_color = list.get(position).split("-"); 
         gridcell.setText(day_color[0]); 
         gridcell.setTag(day_color[0] + "-" + day_color[2] + "-" + day_color[3]); 

         if (day_color[1].equals("GREY")) 
          { 
           gridcell.setTextColor(Color.LTGRAY); 
          } 
         if (day_color[1].equals("WHITE")) 
          { 
           gridcell.setTextColor(Color.WHITE); 
          } 
         if (position == currentDayOfMonth) 
          { 
           gridcell.setTextColor(Color.BLUE); 
          } 

         return row; 
        } 

       @Override 
       public void onClick(View view) 
        { 
         String date_month_year = (String) view.getTag(); 
         Toast.makeText(getApplicationContext(), date_month_year, Toast.LENGTH_SHORT).show(); 

        } 
      } 
    } 

gridcell.xml

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content"> 

    <Button 
     android:id="@+id/gridcell" 
     android:layout_gravity="center" 
     android:textColor="#FFFFFF" 
     android:background="@drawable/calendar_button_selector" 
     android:textAppearance="?android:attr/textAppearanceMedium" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content"> 
    </Button> 
</LinearLayout> 

main.xml中

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:background="@drawable/bg"> 

    <ImageView 
     android:id="@+id/addJournalEntry" 
     android:src="@drawable/add_journal_icon" 
     android:gravity="left" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content"> 
    </ImageView> 

    <Button 
     android:id="@+id/selectedDayMonthYear" 
     android:textColor="#FFFFFF" 
     android:textAppearance="?android:attr/textAppearanceMedium" 
     android:background="@drawable/button_blue_background" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content"> 
    </Button> 

    <LinearLayout 
     xmlns:android="http://schemas.android.com/apk/res/android" 
     android:orientation="horizontal" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content"> 

     <ImageView 
      android:id="@+id/prevMonth" 
      android:src="@drawable/left_cal_button" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content"> 
     </ImageView> 
     <Button 
      android:id="@+id/currentMonth" 
      android:layout_weight="0.8" 
      android:textColor="#FFFFFF" 
     android:textAppearance="?android:attr/textAppearanceMedium" 
      android:background="@drawable/button_blue_background" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content"> 
     </Button> 
     <ImageView 
      android:id="@+id/nextMonth" 
      android:src="@drawable/right_cal_button" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content"> 
     </ImageView> 
    </LinearLayout> 

    <GridView 
     android:id="@+id/calendar" 
     android:horizontalSpacing="-1px" 
     android:verticalSpacing="-1px" 
     android:numColumns="7" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content"> 
    </GridView> 

</LinearLayout> 

你會需要一些繪製，您可以添加一個例子測試。我提供了一些重要的。其他你可以添加一些測試圖像，然後嘗試一下。