public class ScreenUtils {
public static int getScreenWidth(Context context) {
DisplayMetrics localDisplayMetrics = new DisplayMetrics();
((Activity) context).getWindowManager().getDefaultDisplay().getMetrics(localDisplayMetrics);
return localDisplayMetrics.widthPixels;
}
}
DateBean：
public class DateBean {
private int week;
private boolean sign;
//0 上月 1本月 2下月
private int month;
private boolean isFlag;
public boolean isFlag() {
return isFlag;
}
public void setFlag(boolean flag) {
isFlag = flag;
}
public int getWeek() {
return week;
}
public void setWeek(int week) {
this.week = week;
}
public boolean isSign() {
return sign;
}
public void setSign(boolean sign) {
this.sign = sign;
}
public int getMonth() {
return month;
}
public void setMonth(int month) {
this.month = month;
}
public DateBean(int week, boolean sign, int month) {
this.week = week;
this.sign = sign;
this.month = month;
}
}
适配器：DateAdapter
public class DateAdapter extends CommonRecyclerAdapter {
private static final String TAG = "DateAdapter";
private Integer nowDay;
private int year;
private int month;
public DateAdapter(Context context, List list) {
super(context, R.layout.item_date, list);
}
public void setNowDay(int year, int month, int nowDay) {
this.nowDay = nowDay;
this.year = year;
this.month = month;
notifyDataSetChanged();
}
@Override
public void convert(RecyclerHolder holder, DateBean item, int position) {
TextView number = holder.getView(R.id.item_number);
number.setText(item.getWeek() + "");
//当前年月等于切换年月时才选中当天
if (position == nowDay) {
String date = year + "-" + month;
if (date.equals(DataUtils.timeInMillsTrasToDate(1))) {
number.setBackgroundResource(R.drawable.date_unsel_shape);
number.setTextColor(Color.WHITE);
}else {
number.setTextColor(Color.parseColor("#333333"));
}
} else {
number.setBackgroundResource(0);
number.setTextColor(Color.parseColor("#333333"));
if (item.getMonth() == 0 || item.getMonth() == 2) {
number.setTextColor(Color.parseColor("#CDCDCD"));
} else {
number.setTextColor(Color.parseColor("#333333"));
}
}
//点击事件
number.setOnClickListener(view -> {
//本月可以点击
int nowYear = Integer.parseInt(DataUtils.timeInMillsTrasToDate(2));
int nowMonth = Integer.parseInt(DataUtils.timeInMillsTrasToDate(3));
//只有在今天之后的日期才可以选中
if (year == nowYear) {
if (item.getMonth() == 1 && month == nowMonth && position > nowDay) {
onClick(item, number);
} else if (month > nowMonth) {
onClick(item, number);
}
} else if (year > nowYear) {
onClick(item, number);
}
});
}
private void onClick(DateBean item, TextView number) {
if (item.isFlag()) {
item.setFlag(false);
number.setBackgroundResource(0);
number.setTextColor(Color.parseColor("#333333"));
} else {
item.setFlag(true);
number.setBackgroundResource(R.drawable.date_sel_shape);
number.setTextColor(Color.WHITE);
}
}
}
注意：CommonRecyclerAdapter之前写过，这里不再重复
数据源：DataUtils
public class DataUtils {
private static final String TAG = "DataUtils";
/**
* 日历
*/
public static List getCalendar(int currentYear, int currentMonth) {
//实例化集合
List list = new ArrayList<>();
Calendar c = Calendar.getInstance();
c.clear();
/**
* 处理上个月月末
*/
if (currentMonth - 1 == 0) {
c.set(Calendar.YEAR, currentYear - 1);
c.set(Calendar.MONTH, 11);
} else {
c.set(Calendar.YEAR, currentYear);
c.set(Calendar.MONTH, (currentMonth - 2));
}
int last_sumDays = c.getActualMaximum(Calendar.DAY_OF_MONTH);
c.set(Calendar.DATE, last_sumDays);
//得到一号星期几
int weekDay = c.get(Calendar.DAY_OF_WEEK);
if (weekDay < 7) {
for (int i = weekDay - 1; i >= 0; i--) {
Integer date = new Integer(last_sumDays - i);
list.add(new DateBean(date, true, 0));
}
}
/**
* 处理当前月
*/
c.clear();
c.set(Calendar.YEAR, currentYear);
c.set(Calendar.MONTH, currentMonth - 1);
int currentsumDays = c.getActualMaximum(Calendar.DAY_OF_MONTH);
for (int i = 1; i <= currentsumDays; i++) {
Integer date = new Integer(i);
list.add(new DateBean(date, true, 1));
}
/**
* 处理下个月月初
*/
c.clear();
if (currentMonth == 12) {
c.set(Calendar.YEAR, currentYear + 1);
c.set(Calendar.MONTH, 0);
} else {
c.set(Calendar.YEAR, currentYear);
c.set(Calendar.MONTH, currentMonth);
}
c.set(Calendar.DATE, 1);
int currentWeekDay = c.get(Calendar.DAY_OF_WEEK);
if (currentWeekDay > 2 && currentWeekDay < 8) {
for (int i = 1; i <= 8 - currentWeekDay; i++) {
list.add(new DateBean(i, true, 2));
}
}
return list;
}
/**
* 获取上个月大小
*/
public static Integer getLastMonth(int currentYear, int currentMonth) {
//实例化集合
List list = new ArrayList<>();
Calendar c = Calendar.getInstance();
c.clear();
/**
* 处理上个月月末
*/
if (currentMonth - 1 == 0) {
c.set(Calendar.YEAR, currentYear - 1);
c.set(Calendar.MONTH, 11);
} else {
c.set(Calendar.YEAR, currentYear);
c.set(Calendar.MONTH, (currentMonth - 2));
}
int last_sumDays = c.getActualMaximum(Calendar.DAY_OF_MONTH);
c.set(Calendar.DATE, last_sumDays);
//得到一号星期几
int weekDay = c.get(Calendar.DAY_OF_WEEK);
if (weekDay < 7) {
for (int i = weekDay - 1; i >= 0; i--) {
list.add(i);
}
}
Log.e(TAG, "getLastMonth: " + Integer.parseInt(timeInMillsTrasToDate(0)));
return list.size() + Integer.parseInt(timeInMillsTrasToDate(0)) - 1;
}
/**
* list转string字符串
*/
public static String returnList(List list) {
if (null == list && list.size() == 0) {
return "";
} else {
//去除空格
String str = String.valueOf(list).replaceAll(" ", "");
return str.substring(1, str.length() - 1);
}
}
/**
* 时间转换
*/
@TargetApi(Build.VERSION_CODES.N)
public static String timeInMillsTrasToDate(int formatType) {
DateFormat formatter = null;
switch (formatType) {
case 0:
formatter = new SimpleDateFormat("dd");
break;
case 1:
formatter = new SimpleDateFormat("yyyy-MM");
break;
case 2:
formatter = new SimpleDateFormat("yyyy");
break;
case 3:
formatter = new SimpleDateFormat("MM");
break;
}
Calendar calendar = Calendar.getInstance();
return formatter.format(calendar.getTime());
}
}
使用：DateActivity
public class DateActivity extends AppCompatActivity {
private Button openDate;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_date);
openDate = this.findViewById(R.id.open_date);
openDate.setOnClickListener(view -> {
showDateDialog();
});
}
private void showDateDialog() {
int year = Integer.parseInt(DataUtils.timeInMillsTrasToDate(2));
int month = Integer.parseInt(DataUtils.timeInMillsTrasToDate(3));
new SelectDateDialog().builder(this, year, month)
.setListener(selectDate -> openDate.setText(selectDate)).show();
}
}
