最近寫了一個簡易的自定義月曆控件，使用簡單，友善自定義，特此抛磚引玉。在網上看了一些月曆控件，複雜的月曆控件雖然特效好看，但是內建度高，不易修改與擴充。本月曆控件使用gridview編寫，可擴充性好，适合需要簡單用到月曆的項目。效果如下圖：
代碼如下：
import android.content.Context;
import android.support.v4.content.ContextCompat;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.LinearLayout;
import android.widget.TextView;
import java.util.Calendar;
import java.util.Date;
public class CustomCalendar extends LinearLayout implements View.OnClickListener {
TextView recordLeft;
TextView recordTitle;
TextView recordRight;
GridView recordGridView;
private Context context;
private int year;
private int month;
private int[][] days = new int[6][7];
private CalendarAdapter dateAdapter;
private Calendar calendar;
private Calendar minCalendar;
private OnTitleClickListener onTitleClickListener;
private OnDateSelectedListener onDateSelectedListener;
private OnMonthSelectedListener onMonthSelectedListener;
public CustomCalendar(Context context) {
super(context);
this.context = context;
init();
}
public CustomCalendar(Context context, AttributeSet attrs) {
super(context, attrs);
this.context = context;
init();
}
public CustomCalendar(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
this.context = context;
init();
}
private void init() {
View view = LayoutInflater.from(context).inflate(R.layout.layout_calendar, this, true);
recordLeft = (TextView) view.findViewById(R.id.record_left);
recordRight = (TextView) view.findViewById(R.id.record_right);
recordTitle = (TextView) view.findViewById(R.id.record_title);
recordGridView = (GridView) view.findViewById(R.id.record_gridView);
recordLeft.setOnClickListener(this);
recordRight.setOnClickListener(this);
recordTitle.setOnClickListener(this);
view.setBackgroundColor(ContextCompat.getColor(context, android.R.color.white));
calendar = Calendar.getInstance();
year = calendar.get(Calendar.YEAR);
month = calendar.get(Calendar.MONTH) + 1;
days = CalendarUtils.getDayOfMonthFormat(year, month);
dateAdapter = new CalendarAdapter(context, days, year, month);//傳入目前月的年
String title = year + "年" + month + "月";
recordTitle.setText(title);
recordGridView.setAdapter(dateAdapter);
dateAdapter.changeListHeight(recordGridView, 7);
recordGridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
if (i < 7 && dateAdapter.getItem(i) > 20) {
} else if (i > 20 && dateAdapter.getItem(i) < 15) {
} else {
calendar.set(year, month - 1, dateAdapter.getItem(i));
dateAdapter.setSelectDate(calendar.getTime());
if (onDateSelectedListener != null) onDateSelectedListener.onDateSelected(calendar.getTime());
}
}
});
}
public void setOnTitleClickListener(OnTitleClickListener l) {
this.onTitleClickListener = l;
}
public void setOnDateSelectedListener(OnDateSelectedListener l) {
this.onDateSelectedListener = l;
}
public void setOnMonthSelectedListener(OnMonthSelectedListener l) {
this.onMonthSelectedListener = l;
}
public void preMonth() {
if (month == 1) {
month = 12;
year--;
} else {
month--;
}
updateMonth();
}
private void updateMonth() {
days = CalendarUtils.getDayOfMonthFormat(year, month);
dateAdapter = new CalendarAdapter(context, days, year, month);
dateAdapter.setSelectDate(calendar.getTime());
recordGridView.setAdapter(dateAdapter);
dateAdapter.changeListHeight(recordGridView, 7);
String title = year + "年" + month + "月";
recordTitle.setText(title);
if (minCalendar != null) {
if (minCalendar.get(Calendar.YEAR) >= year && minCalendar.get(Calendar.MONTH) + 1 >= month) {
setPreMonthEnable(false);
} else setPreMonthEnable(true);
}
Calendar calendar1 = Calendar.getInstance();
calendar1.set(Calendar.YEAR, year);
calendar1.set(Calendar.MONTH, month - 1);
if (onMonthSelectedListener != null) {
onMonthSelectedListener.onMonthSelected(calendar1.getTime());
}
}
public void nextMonth() {
if (month == 12) {
month = 1;
year++;
} else {
month++;
}
updateMonth();
}
public void onClick(View view) {
int i = view.getId();
if (i == R.id.record_left) {
preMonth();
} else if (i == R.id.record_title) {
if (onTitleClickListener != null) onTitleClickListener.onClick();
} else if (i == R.id.record_right) {
nextMonth();
}
}
public void showMonth(int year, int month) {
this.year = year;
this.month = month;
updateMonth();
}
public int getYear() {
return year;
}
public int getMonth() {
return month;
}
public void setPreMonthEnable(boolean enable) {
recordLeft.setEnabled(enable);
recordLeft.setTextColor(ContextCompat.getColor(context, enable ? android.R.color.holo_blue_light : android.R.color.darker_gray));
}
public void setMinCalendar(Calendar calendar) {
this.minCalendar = calendar;
if (minCalendar.get(Calendar.YEAR) >= year && minCalendar.get(Calendar.MONTH) + 1 >= month) {
setPreMonthEnable(false);
} else setPreMonthEnable(true);
}
public void setMarkingDays(int[] markingDays) {
dateAdapter.setMarkingDays(markingDays);
}
public void setSelectedDay(Date date) {
dateAdapter.setSelectDate(date);
}
public interface OnTitleClickListener {
void onClick();
}
public interface OnDateSelectedListener {
void onDateSelected(Date date);
}
public interface OnMonthSelectedListener {
void onMonthSelected(Date date);
}
}
這是一個将android原生控件組合起來的自定義控件，繼承自LinearLayout，上方是月曆标題和按鈕，下方是一個Gridview。沒有自定義屬性，可以直接在代碼裡更改樣式或者根據需要擴充。點選上一個月或者下一個月可切換，點選月曆中某一天可以選中，同時onDateSelectedListener會執行回調方法，可以設定它以完成一些特定的業務需求。setMinCalendar()方法可以設定一個最小的日期，顯示到最小日期時上一個月将不可點選。setMarkingDays()可以設定複數個被辨別的日期，但要注意的是切換月份時辨別會被清空，需重新設定。setSelectedDay()可以設定月曆的初始選中日期。還有點選月曆标題的回調和切換月份的回調，可以完成相應的業務需求。
關于月曆的顯示規則可到CalendarAdapter裡進行修改，月曆日期的計算則包含在CalendarUtils裡，整個月曆控件隻包含三個類和幾個資源檔案，層次簡單，便于拓展。我已将完整代碼打包成可以引用成lib的子產品，內建到項目中即可使用。引用示例：
<com.example.simplecalendar.CustomCalendar
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
下載下傳完整代碼請移步至： 點選打開連結
![Android中 xml 屬性 fill_parent、warp_content、match_parent差別[圖]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)