Calendar (the calendar for accounting is currently plus or minus)
1. Entity class
public class CalendarBean {
//0: current month, 1: last month, 2: next month
private int dayType;
//Week
private String weekOfDay;
//date
private String day;
// actual date
private Date date;
public Date getDate() {
return date;
}
public void setDate(Date date) {
this.date = date;
}
public int getDayType() {
return dayType;
}
public void setDayType(int dayType) {
this.dayType = dayType;
}
public String getWeekOfDay() {
return weekOfDay == null ? "" : weekOfDay;
}
public void setWeekOfDay(String weekOfDay) {
this.weekOfDay = weekOfDay == null ? "" : weekOfDay;
}
public String getDay() {
return day == null ? "" : day;
}
public void setDay(String day) {
this.day = day == null ? "" : day;
}
}
2. Adapter
import android. content. Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import java.util.ArrayList;
import java.util.List;
public abstract class BaseRecycerAdapter<T> extends RecyclerView.Adapter<ViewHolder> {
private List<T> mData;
private Context mContext;
private int mResId;
private OnItemClickListener<T> mItemClickListener;
private OnItemLongClickListener<T> mItemLongClickListener;
public BaseRecycerAdapter(Context context, List<T> datas, int resId) {
this.mContext = context;
this.mData = datas;
this.mResId = resId;
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
View itemView = LayoutInflater.from(mContext).inflate(mResId, viewGroup, false);
return new ViewHolder(itemView);
}
@Override
public final void onBindViewHolder(@NonNull ViewHolder viewHolder, final int i) {
final T t = mData. get(i);
onBindViewHolder(viewHolder, t, i);
viewHolder.getRootView().setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mItemClickListener != null) {
mItemClickListener. onItemClick(t, i);
}
}
});
viewHolder.getRootView().setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View view) {
if (mItemLongClickListener != null) {
mItemLongClickListener.onItemLongClickListener(t, i);
}
return false;
}
});
}
@Override
public int getItemCount() {
if (mData != null & amp; & amp; mData. size() > 0) {
return mData. size();
}
return 0;
}
/**
* @param viewHolder
* @param itemVO
* @param position
*/
public abstract void onBindViewHolder(ViewHolder viewHolder, T itemVO, int position);
public interface OnItemClickListener<T> {
void onItemClick(T t, int position);
}
public interface OnItemLongClickListener<T> {
void onItemLongClickListener(T t, int position);
}
public BaseRecycerAdapter setOnItemClickListener(OnItemClickListener listener) {
if (listener != null) {
this.mItemClickListener = listener;
}
return this;
}
public BaseRecycerAdapter setOnItemLongClickListener(OnItemLongClickListener listener) {
this.mItemLongClickListener = listener;
return this;
}
public List<T> getData() {
if (mData == null) {
mData = new ArrayList<>();
}
return mData;
}
public void setData(List<T> mData) {
this.mData = mData;
}
}
3. Adapter
import android.text.TextUtils;
import android.util.SparseArray;
import android.view.View;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
public class ViewHolder extends RecyclerView. ViewHolder {
private SparseArray<View> mViews;
private View mRootView;
public ViewHolder(@NonNull View itemView) {
super(itemView);
this.mRootView = itemView;
mViews = new SparseArray<>();
}
// get view
public <T extends View> T findViewById(int id) {
View view = mViews. get(id);
if (view == null) {
view = itemView. findViewById(id);
mViews. put(id, view);
}
return (T) view;
}
public View getRootView() {
return mRootView;
}
/**
* Directly set the content of TextView, only used by TextView and its subclasses
*
* @param id needs to set the ID of the View
* @param text the content to be set
* @return
*/
public ViewHolder setText(int id, String text) {
if (!TextUtils.isEmpty(text) & amp; & amp; id != 0) {
View view = findViewById(id);
if (view instanceof TextView) {
((TextView) view).setText(text);
}
}
return this;
}
}
4. Customized calendar view
import android. content. Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewConfiguration;
import android.widget.FrameLayout;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import com.example.bookkeeping.R;
import com.example.bookkeeping.activity.adapter.BaseRecycerAdapter;
import com.example.bookkeeping.activity.adapter.ViewHolder;
import com.example.bookkeeping.activity.bean.CalendarBean;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
public class CustomCalendarView extends FrameLayout {
protected float FLIP_DISTANCE;
private SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM");
private RecyclerView listView;
private ArrayList<CalendarBean> mDatas = new ArrayList<>();
private BaseRecycerAdapter mAdapter;
//Current display month
private CalendarBean mCurrentMonthCalendar;
public CustomCalendarView(@NonNull Context context) {
super(context);
init(context, null);
}
public CustomCalendarView(@NonNull Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
init(context, attrs);
}
public CustomCalendarView(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context, attrs);
}
private void init(Context context, AttributeSet attrs) {
FLIP_DISTANCE = ViewConfiguration.get(context).getScaledTouchSlop();
View view = LayoutInflater.from(context).inflate(R.layout.view_calendar, this);
listView = view.findViewById(R.id.list_date);
initAdapter();
initData(null);
listView.setLayoutManager(new GridLayoutManager(context, 7));
listView.setAdapter(mAdapter);
}
private float downX;
private float downY;
@Override
public boolean dispatchTouchEvent(MotionEvent event) {
switch (event. getAction()) {
case MotionEvent. ACTION_DOWN:
downX = event. getX();
downY = event. getY();
break;
case MotionEvent. ACTION_MOVE:
break;
case MotionEvent. ACTION_UP:
float upX = event. getX();
float upY = event. getY();
float suduY = Math.abs(downY - upY);
if (upX - downX > suduY & amp; & amp; upX - downX > FLIP_DISTANCE) {
goLastMonth();
}
if (downX - upX > suduY & amp; & amp; downX - upX > FLIP_DISTANCE) {
goNextMonth();
}
break;
}
return super. dispatchTouchEvent(event);
}
private void initAdapter() {
mAdapter = new BaseRecycerAdapter<CalendarBean>(getContext(), mDatas, R.layout.item_scheduling_day) {
@Override
public void onBindViewHolder(ViewHolder viewHolder, CalendarBean itemVO, int position) {
TextView tv_day = viewHolder.findViewById(R.id.tv_day);
// TextView tv_state = viewHolder.findViewById(R.id.tv_state);
tv_day.setText(itemVO.getDay());
if (itemVO. getDayType() == 1) {
// last month's data
tv_day.setTextColor(getResources().getColor(R.color.color_999999));
viewHolder.getRootView().setBackgroundColor(getResources().getColor(R.color.color_ffffff));
// tv_state. setVisibility(INVISIBLE);
} else {
viewHolder.getRootView().setBackgroundColor(getResources().getColor(R.color.color_ffffff));
tv_day.setTextColor(getResources().getColor(R.color.color_434343));
// tv_state. setVisibility(VISIBLE);
}
}
};
}
/**
* initialization time
*
* @param indexDate yyyy-MM-dd
*/
private void initData(CalendarBean indexDate) {
Calendar instance = Calendar. getInstance();
if (indexDate != null) {
//custom month
instance.setTime(indexDate.getDate());
}
//Get the largest date in the current month
int maxDate = instance.getActualMaximum(Calendar.DATE);
instance.set(Calendar.DAY_OF_MONTH, 1);
// Get all the days in the current month
for (int i = 0; i < maxDate; i ++ , instance. add(Calendar. DATE, 1)) {
int day = instance. get(Calendar. DAY_OF_MONTH);
CalendarBean calendarBean = new CalendarBean();
calendarBean.setDay(String.valueOf(day));
calendarBean.setDate(instance.getTime());
mDatas.add(calendarBean);
}
//assign the current month
mCurrentMonthCalendar = mDatas. get(0);
ArrayList<CalendarBean> calendarBeans = processDay(mDatas);
mDatas.clear();
mDatas.addAll(calendarBeans);
mAdapter. notifyDataSetChanged();
}
/**
* Get the current month
*
* @return
*/
public String getMonth() {
return simpleDateFormat. format(mCurrentMonthCalendar. getDate());
}
/**
* show next month
*/
public void goNextMonth() {
String lastMonth = simpleDateFormat. format(mCurrentMonthCalendar. getDate());
Calendar instance = Calendar. getInstance();
instance.setTime(mCurrentMonthCalendar.getDate());
instance. add(Calendar. MONTH, 1);
CalendarBean tempBean = new CalendarBean();
tempBean.setDate(instance.getTime());
mDatas.clear();
initData(tempBean);
String newMonth = simpleDateFormat. format(tempBean. getDate());
if (listener != null) {
listener.onMonthChanger(lastMonth, newMonth);
}
}
/**
* show previous month
*/
public void goLastMonth() {
String lastMonth = simpleDateFormat. format(mCurrentMonthCalendar. getDate());
Calendar instance = Calendar. getInstance();
instance.setTime(mCurrentMonthCalendar.getDate());
instance. add(Calendar. MONTH, -1);
CalendarBean tempBean = new CalendarBean();
tempBean.setDate(instance.getTime());
mDatas.clear();
initData(tempBean);
String newMonth = simpleDateFormat. format(tempBean. getDate());
if (listener != null) {
listener.onMonthChanger(lastMonth, newMonth);
}
}
/**
* Splicing the data of the previous month and the data of the next month
*
* @param signDatas
* @return
*/
private ArrayList<CalendarBean> processDay(ArrayList<CalendarBean> signDatas) {
ArrayList<CalendarBean> list = new ArrayList<>();
// Get the number of days that need to be completed in the previous month
ArrayList<CalendarBean> lastMonth = getLastMonth(signDatas.get(0));
// Get the number of days that need to be completed in the next month
ArrayList<CalendarBean> nextMonth = getNextMonth(signDatas.get(0));
if (lastMonth != null & amp; & amp; lastMonth. size() > 0) {
//If there are days in the previous month, add them
list. addAll(lastMonth);
}
if (signDatas != null) {
//The number of days in the current month
list.addAll(signDatas);
}
if (nextMonth != null & amp; & amp; nextMonth. size() > 0) {
//If there are days in the next month, add them
list. addAll(nextMonth);
}
return list;
}
/**
* Get the number of days that need to be completed in the previous month
*
* @return
*/
private ArrayList<CalendarBean> getLastMonth(CalendarBean calendarBean) {
// Get the first day of the current month
Calendar calendarFirstDay = Calendar. getInstance();
calendarFirstDay.setTime(calendarBean.getDate());
calendarFirstDay.set(Calendar.DAY_OF_MONTH, 1);
//The first day of the month is the day of the week
int firstDayOfWeek = calendarFirstDay. get(Calendar. DAY_OF_WEEK);
if (firstDayOfWeek != 1) {
/**
* When firstDayOfWeek =1, it is Sunday. The first day of the current month is already on Sunday, so there is no need to add the supplementary days of the previous month
*/
//Number of days that need to be completed. When needAdd is negative, it means that it is Sunday and 6 days need to be completed
int needAdd = firstDayOfWeek - 1;
ArrayList<CalendarBean> lastMonth = new ArrayList<>();
for (int i = 0; i < needAdd; i ++ ) {
CalendarBean dayBean = new CalendarBean();
//0: current month, 1: last month, 2: next month
dayBean.setDayType(1);
dayBean.setWeekOfDay(getWeekString(i));
//Get the number of days that need to be completed in the previous month
//calendarFirstDay.set(Calendar.DAY_OF_MONTH, 0 - i);
calendarFirstDay.add(Calendar.DATE, -1);
//Number of days in the previous month
int lastMonthDay = calendarFirstDay. get(Calendar. DAY_OF_MONTH);
dayBean.setDay(String.valueOf(lastMonthDay));
dayBean.setDate(dayBean.getDate());
lastMonth.add(0, dayBean);
}
return lastMonth;
}
return new ArrayList<>();
}
/**
* Get the number of days that need to be completed in the next month
*
* @return
*/
private ArrayList<CalendarBean> getNextMonth(CalendarBean calendarBean) {
// Get the last day of the current month
Calendar calendarLastDay = Calendar. getInstance();
calendarLastDay.setTime(calendarBean.getDate());
calendarLastDay. add(Calendar. MONTH, 1);
calendarLastDay.set(Calendar.DAY_OF_MONTH, 0);
//Get the last day of the current month is the day of the week
int nextDayOfWeek = calendarLastDay. get(Calendar. DAY_OF_WEEK);
if (nextDayOfWeek != 7) {
/**
* When nextDayOfWeek =7, it is Saturday, and the last day of the current month is already on Saturday, so there is no need to add the supplementary days of the previous month
*/
int needAdd = 7 - nextDayOfWeek;
ArrayList<CalendarBean> nextMonth = new ArrayList<>();
for (int i = 1; i <= needAdd; i ++ ) {
CalendarBean dayBean = new CalendarBean();
//0: current month, 1: last month, 2: next month
dayBean.setDayType(2);
dayBean.setWeekOfDay(getWeekString(i));
//Get the number of days that need to be completed in the previous month
calendarLastDay.set(Calendar.DAY_OF_MONTH, i);
//Number of days in the previous month
int lastMonthDay = calendarLastDay. get(Calendar. DAY_OF_MONTH);
dayBean.setDay(String.valueOf(lastMonthDay));
dayBean.setDate(dayBean.getDate());
nextMonth.add(dayBean);
}
return nextMonth;
}
return new ArrayList<>();
}
private String getWeekString(int i) {
switch (i) {
case 1:
return "Sunday";
case 2:
return "Monday";
case 3:
return "Tuesday";
case 4:
return "Wednesday";
case 5:
return "Thursday";
case 6:
return "Friday";
case 7:
return "Saturday";
default:
return "out of range";
}
}
private OnMonthChangerListener listener;
public void setOnMonthChangerListener(OnMonthChangerListener listener) {
this.listener = listener;
}
public interface OnMonthChangerListener {
void onMonthChanger(String lastMonth, String newMonth);
}
}
5. Items in the adapter
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="56dp"
android:layout_height="68dp">
<TextView
android:id="@ + id/tv_day"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:text="21"
android:textColor="#434343"
android:textSize="13sp"
android:textStyle="bold"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<androidx.appcompat.widget.AppCompatTextView
android:id="@ + id/appCompatTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="3dp"
android:text=" + 200.00"
android:textColor="#FF7D7E"
android:textSize="12sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@id/tv_day" />
<androidx.appcompat.widget.AppCompatTextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="-0.00"
android:textColor="#3ED1AE"
android:textSize="12sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@ + id/appCompatTextView" />
</androidx.constraintlayout.widget.ConstraintLayout>
6. Customize the xml in the view
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout
android:id="@ + id/ll_week"
android:layout_width="match_parent"
android:layout_height="33dp"
android:orientation="horizontal"
android:paddingLeft="15dp"
android:paddingRight="15dp"
app:layout_constraintLeft_toLeftOf="parent">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:text="day"
android:textColor="#999999"
android:textSize="14dp" />
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:text="one"
android:textColor="#999999"
android:textSize="14dp" />
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:text="two"
android:textColor="#999999"
android:textSize="14dp" />
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:text="three"
android:textColor="#999999"
android:textSize="14dp" />
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:text="four"
android:textColor="#999999"
android:textSize="14dp" />
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:text="five"
android:textColor="#999999"
android:textSize="14dp" />
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:text="six"
android:textColor="#999999"
android:textSize="14dp" />
</LinearLayout>
<androidx.recyclerview.widget.RecyclerView
android:id="@ + id/list_date"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp"
android:background="@drawable/bud_get_goal_bg"
tools:itemCount="31"
tools:layoutManager="androidx.recyclerview.widget.GridLayoutManager"
tools:listitem="@layout/item_scheduling_day"
tools:spanCount="7" />
</LinearLayout>
7. Activity live fragment xml
<androidx.constraintlayout.widget.ConstraintLayout
android:id="@ + id/constraintLayout8"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="19dp"
app:layout_constraintTop_toTopOf="parent">
<androidx.appcompat.widget.AppCompatImageView
android:id="@ + id/iv_billing_calendar_finish"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="19dp"
android:src="@drawable/ic_back_dt"
app:layout_constraintBottom_toBottomOf="@ + id/tv_date"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@ + id/tv_date" />
<View
android:id="@ + id/view_line1"
android:layout_width="0dp"
android:layout_height="10dp"
android:background="#F6F6F6"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@ + id/tv_date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="21dp"
android:text="2020-05"
android:textColor="#171717"
android:textSize="18sp"
android:textStyle="bold"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@id/view_line1" />
<ImageView
android:id="@ + id/iv_last_month"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="21dp"
android:src="@drawable/ic_arrow_left"
app:layout_constraintBottom_toBottomOf="@id/tv_date"
app:layout_constraintRight_toLeftOf="@id/tv_date"
app:layout_constraintTop_toTopOf="@id/tv_date" />
<ImageView
android:id="@ + id/iv_next_month"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="21dp"
android:src="@drawable/ic_arrow_right"
app:layout_constraintBottom_toBottomOf="@id/tv_date"
app:layout_constraintLeft_toRightOf="@id/tv_date"
app:layout_constraintTop_toTopOf="@id/tv_date" />
<View
android:id="@ + id/view_line2"
android:layout_width="0dp"
android:layout_height="0.5dp"
android:background="#EDEDED"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@id/iv_next_month" />
<com.example.bookkeeping.activity.widget.CustomCalendarView
android:id="@ + id/calendarView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginStart="12dp"
android:layout_marginEnd="12dp"
android:background="@drawable/bud_get_goal_bg"
app:layout_constraintTop_toBottomOf="@id/view_line2" />
</androidx.constraintlayout.widget.ConstraintLayout>
8. In the activity or in the fragment
iv_billing_calendar_finish.setOnClickListener {
finish()
}
//Change the year and month of the title
val month = calendarView!!.month
tv_date!!.text = month
iv_last_month.setOnClickListener { // last month
calendarView!!.goLastMonth()
}
iv_next_month.setOnClickListener { //Next month
calendarView!!.goNextMonth()
}
//Change the year and month of the title
calendarView.setOnMonthChangerListener(CustomCalendarView.OnMonthChangerListener { lastMonth, newMonth ->
tv_date.text = newMonth
})