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Mobile note application
2022-07-01 12:33:00 【Comeจุ๊】
Note application
The functions realized by the memo Application
1、 Add, delete, modify and check the memo Application
2、 Modify the skin of note application , Synchronize the color of the note on the home page
3、 Make a specific display for the time display of the memo Application ： The day shows –> today hh:mm , Displayed yesterday --> yesterday hh:mm, This week shows –> What day of the week hh:mm, Otherwise, it will show yyyy/MM/dd
4、 On the edit page of the memo , You can set the reminder time of the memo , Select the date for the first time , Choose the second time
5、 Long press the home page to operate the memo as a whole
6、 You can set the top setting for the memo , Can be set individually , It can also be set in batch
7、 When the notes are all on top , Long press the edited Overhead The button becomes Cancel the top Button
7、 When selecting an un overhead tag , You will be prompted whether to place the label on top , The opposite is true
The overall idea and code of memo application
1、 First, conceive the homepage layout of the memo Application ,
Specific data display uses RecyclerView Show the data , The layout of the home page shows a new button , And it hides the layout after long pressing （ Cancel 、 Future generations 、 Overhead 、 Delete ）; And in the layout visibility Set to gone
activity_main.xml
<?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="match_parent" android:background="@color/background" android:orientation="vertical">
<Toolbar android:id="@+id/id_note_toolbar" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@color/toolbar" android:visibility="gone">
<Button android:id="@+id/header_cancel" android:layout_width="wrap_content" android:layout_height="40dp" android:layout_gravity="left" android:gravity="center" android:background="@drawable/button_style" android:backgroundTint="@color/toolbar_button" android:text="@string/press_cancel" android:textSize="15sp"/>
<TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:textColor="@color/white" android:text="@string/press_edit" android:textSize="20sp"/>
<Button android:id="@+id/header_selectAll" android:layout_width="wrap_content" android:layout_height="40dp" android:layout_gravity="right" android:background="@drawable/button_style" android:backgroundTint="@color/toolbar_button" android:textColor="@color/white" android:layout_marginRight="20dp" android:text="@string/press_selectAll" android:textSize="15sp"/>
</Toolbar>
<androidx.recyclerview.widget.RecyclerView android:id="@+id/recycler" android:layout_marginTop="10dp" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_weight="1">
</androidx.recyclerview.widget.RecyclerView>
<LinearLayout android:id="@+id/id_note_add" android:layout_width="match_parent" android:layout_height="120dp" android:layout_weight="1" android:background="#302424" android:orientation="vertical" android:visibility="visible">
<ImageView android:id="@+id/add_pic" android:layout_width="20dp" android:layout_height="20dp" android:src="@mipmap/ic_note_add" android:layout_gravity="center" android:layout_weight="1"/>
<TextView android:id="@+id/add_text" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:textSize="15sp" android:text="@string/main_add" android:gravity="center" android:textColor="@color/white" android:layout_weight="1"/>
</LinearLayout>
<!-- Hide the bottom navigation bar ==> Top and delete buttons -->
<LinearLayout android:id="@+id/id_note_bottom" android:layout_width="match_parent" android:layout_height="180dp" android:layout_weight="1" android:orientation="horizontal" android:visibility="gone" android:background="@color/purple_200">
<LinearLayout android:id="@+id/header_top" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_weight="1" android:gravity="center" android:background="@color/toolbar" android:orientation="vertical">
<ImageView android:layout_width="20dp" android:layout_height="20dp" android:layout_gravity="center" android:src="@mipmap/ic_note_edit_top"/>
<TextView android:id="@+id/tv_header_top" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:textColor="@color/white" android:textSize="15sp" android:paddingTop="5dp" android:text="@string/home_top"/>
</LinearLayout>
<TextView android:layout_width="1dp" android:layout_height="match_parent" android:background="#4f4545"/>
<LinearLayout android:id="@+id/header_delete" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_weight="1" android:background="@color/toolbar" android:gravity="center" android:orientation="vertical">
<ImageView android:layout_width="20dp" android:layout_height="20dp" android:layout_gravity="center" android:src="@mipmap/ic_note_edit_delete"/>
<TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:textColor="@color/white" android:textSize="15sp" android:paddingTop="5dp" android:text="@string/delete"/>
</LinearLayout>
</LinearLayout>
</LinearLayout>
Initial homepage layout ：
Hidden homepage layout （ Long press to display ）：
2、 For each item The specific layout of , Use RecyclerView Layout display
note_item.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:padding="5dp">
<LinearLayout android:id="@+id/lr_list_container" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:background="@color/menu_theme4">
<ImageView android:id="@+id/iv_topTab" android:visibility="invisible" android:layout_width="20dp" android:layout_height="20dp" android:src="@mipmap/ic_header_top"/>
<LinearLayout android:id="@+id/recycler_background" android:layout_width="wrap_content" android:layout_height="100dp" android:layout_weight="1" android:orientation="horizontal" android:padding="10dp">
<TextView android:id="@+id/tv_content" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/tv_time" android:layout_gravity="center" android:layout_marginTop="5dp" android:maxLines="2" android:text=" I don't want to " android:textColor="@color/black" android:textSize="20sp" />
</LinearLayout>
<LinearLayout android:layout_width="wrap_content" android:layout_height="100dp" android:orientation="vertical">
<TextView android:id="@+id/tv_time" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="10dp" android:layout_marginRight="10dp" android:paddingLeft="5dp" android:text="2021/5/30 02:30" android:textColor="@color/black" android:textSize="16sp" android:layout_weight="1" android:gravity="right"/>
<LinearLayout android:layout_width="150dp" android:layout_height="wrap_content" android:layout_weight="1" android:gravity="right" android:orientation="horizontal">
<ImageView android:id="@+id/iv_remind" android:layout_width="30dp" android:layout_height="30dp" android:layout_gravity="center_vertical" android:layout_marginRight="10dp" android:src="@mipmap/ic_note_clock" android:visibility="visible" />
<CheckBox android:id="@+id/checkbox" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="10dp" android:buttonTint="#ffffff" android:checked="false" android:gravity="center_vertical" android:scaleX="1.5" android:scaleY="1.5" android:visibility="gone" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
</LinearLayout>
According to the effect ：checkbox To hide （gone）, When long press , appear checkbox
3、recyclerView Adapter code
RecyclerAdapter.java
package com.tinno.adapter;
import static android.view.View.VISIBLE;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.text.TextUtils;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.Toolbar;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AlertDialog;
import androidx.recyclerview.widget.RecyclerView;
import com.tinno.bean.Note;
import com.tinno.db.NoteDbHelper;
import com.tinno.sticky_note.EditNoteActivity;
import com.tinno.sticky_note.MainActivity;
import com.tinno.sticky_note.R;
import com.tinno.utils.FormatTime;
import java.io.Serializable;
import java.util.List;
public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.RecyclerViewHolder> {
private static final String TAG = "RecyclerAdapter";
private List<Note> mBeanList;
private Context mContext;
private boolean showIcon = false;
private int flag = 0; // Number of hits
public boolean isCheck;
private LinearLayout mNoteAdd,mNoteBottom;
private Toolbar noteToolbar;
public RecyclerAdapter(Context context, List<Note> mBeanList) {
this.mContext = context;
this.mBeanList = mBeanList;
}
@NonNull
@Override
public RecyclerViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(mContext).inflate(R.layout.note_item, parent, false);
return new RecyclerViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull RecyclerViewHolder holder, int position) {
Note note = mBeanList.get(position);
holder.mTvCreateTime.setText(FormatTime.FormatTimeForDb(note.getCreatedTime()));
holder.mTvContent.setText(note.getContent());
holder.lrContainer.setBackgroundColor(note.getColor());
// Set the long press click event for the control
holder.lrContainer.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View view) {
// Yes flag Make a self increasing , When flag From the beginning of clicking , When flag yes 2 The divisor of ,showIcon Set up false, On the contrary, set it to true;
flag++;
Log.d(TAG, "showIcon " + showIcon);
// Set all variables , When long press and click , The status changes to true, And call notifyItemRangeChanged(int positionStart,int itemCount) Method to refresh from the specified location , How many to refresh
//Toast.makeText(mContext, "showIcon The state of " + showIcon, Toast.LENGTH_SHORT).show();
if (flag % 2 == 0 ){
showIcon = false;
}else {
showIcon = true;
}
showOrHide(showIcon);
//Toast.makeText(mContext, " Get the item Of id" + mBeanList.get(position), Toast.LENGTH_SHORT).show();
notifyItemRangeChanged(0,mBeanList.size());
return true;
}
});
// Judge showIcon Is the state of true, by true When ,checkbox Show , Anyway, it's hidden
holder.mCheckBox.setVisibility(showIcon ? VISIBLE : View.GONE);
/** * When the user clicks the button, the content of the memo is passed to AddNoteActivity */
holder.lrContainer.setOnClickListener(view -> {
Intent intent = new Intent(mContext, EditNoteActivity.class);
intent.putExtra("note",note);
Log.d(TAG, "adapter towards activity The value of intermediate transmission is : " + note.getId());
mContext.startActivity(intent);
});
// Judge whether the alarm clock reminder time is set , If the reminder time is not set , Hide the alarm icon
NoteDbHelper noteDbHelper = new NoteDbHelper(mContext);
List<Note> noteList = noteDbHelper.queryAllFromDb();
if (TextUtils.isEmpty(noteList.get(position).getRemind())){
//Log.d(TAG, "onBindViewHolder: " + 123);
holder.mTvRemind.setVisibility(View.GONE);
}else {
holder.mTvRemind.setVisibility(VISIBLE);
holder.mTvRemind.setOnClickListener(view -> {
showDialog(noteList.get(position).getRemind());
});
}
// Set the top tag for the content of the top memo
if (noteList.get(position).getIsTop() == 1){
holder.mIvTopTab.setVisibility(VISIBLE);
}else if (noteList.get(position).getIsTop() == 0){
holder.mIvTopTab.setVisibility(View.INVISIBLE);
}
}
// Click the alarm clock icon , Pop up a dialog, Used to display the content and time of the prompt
public void showDialog(String str){
AlertDialog dialog = new AlertDialog.Builder(mContext)
.setTitle(" Event reminder ")
.setMessage(str + "\n" + str)
.create();
dialog.show();
}
// obtain MainActivity Control in , And show and hide the control
public void showOrHide(boolean isShow){
mNoteAdd = ((MainActivity) mContext).findViewById(R.id.id_note_add);
mNoteBottom = ((MainActivity) mContext).findViewById(R.id.id_note_bottom);
noteToolbar = ((MainActivity) mContext).findViewById(R.id.id_note_toolbar);
if (isShow){
mNoteAdd.setVisibility(View.GONE);
mNoteBottom.setVisibility(VISIBLE);
noteToolbar.setVisibility(VISIBLE);
}else {
mNoteAdd.setVisibility(VISIBLE);
mNoteBottom.setVisibility(View.GONE);
noteToolbar.setVisibility(View.GONE);
}
}
@Override
public int getItemCount() {
return mBeanList == null ? 0 : mBeanList.size();
}
@Override
public long getItemId(int position) {
return position;
}
public class RecyclerViewHolder extends RecyclerView.ViewHolder {
private TextView mTvCreateTime;
private TextView mTvContent;
private ImageView mTvRemind,mIvTopTab;
private ViewGroup lrContainer;
private LinearLayout recycler_background;
private CheckBox mCheckBox;
public RecyclerViewHolder(@NonNull View itemView) {
super(itemView);
mTvCreateTime = itemView.findViewById(R.id.tv_time);
mTvContent = itemView.findViewById(R.id.tv_content);
mTvRemind = itemView.findViewById(R.id.iv_remind);
lrContainer = itemView.findViewById(R.id.lr_list_container);
mCheckBox = itemView.findViewById(R.id.checkbox);
recycler_background = itemView.findViewById(R.id.recycler_background);
mIvTopTab = itemView.findViewById(R.id.iv_topTab);
// Click event of multiple selection boxes
mCheckBox.setOnClickListener(view -> {
if (mCheckBox.isChecked()){
mOnItemClickListener.onRecyclerItemClick(getAdapterPosition());
}
});
}
}
private OnRecyclerItemClickListener mOnItemClickListener;
// Set the method of listening
public void setRecyclerItemClickListener(OnRecyclerItemClickListener listener){
mOnItemClickListener = listener;
}
// Customize a listener
public interface OnRecyclerItemClickListener{
void onRecyclerItemClick(int position);
}
}
4、 The code of the main initiator ,
And set click events for some controls on the main page
MainActivity.java
package com.tinno.sticky_note;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import com.tinno.adapter.RecyclerAdapter;
import com.tinno.bean.Note;
import com.tinno.db.NoteDbHelper;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private static final String TAG = "MainActivity";
private Context mContext;
private List<Note> data;
private RecyclerView mRecyclerView;
private RecyclerAdapter mRecyclerAdapter;
private List<String> list;
private NoteDbHelper mNoteDbHelper = new NoteDbHelper(this);
private LinearLayout mNoteAdd;
private Button headerCancel,headerSelectAll;
private LinearLayout headerTop,headerDelete;
private TextView tvHeaderTop;
private ImageView addpic; // Add Icon
private Intent intent;
private Handler mHandler;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mContext = this;
mNoteAdd = findViewById(R.id.id_note_add);
mNoteAdd.setOnClickListener(this);
initView();
}
@Override
protected void onResume() {
super.onResume();
mRecyclerView = (RecyclerView) findViewById(R.id.recycler);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(mContext);
mRecyclerView.setLayoutManager(linearLayoutManager);
mNoteDbHelper = new NoteDbHelper(mContext);
data = new ArrayList<>();
Log.d(TAG, "init: ....." );
data = mNoteDbHelper.queryAllFromDb();
// Log.d(TAG, "init: " + data);
mRecyclerAdapter = new RecyclerAdapter(mContext,data);
mRecyclerView.setAdapter(mRecyclerAdapter);
// Change the top setting to cancel the top setting
ChangeTopButtonContent();
// Get the recyclerview Medium checkbox
show();
}
// obtain RecyclerView in checkBox Contents of the selection box
public void show(){
list = new ArrayList<>();
mRecyclerAdapter.setRecyclerItemClickListener(position -> {
list.add(data.get(position).getId());
Log.d(TAG, "show: " + list);
//Toast.makeText(mContext, " Whether it is overhead " + data.get(position).getIsTop(), Toast.LENGTH_SHORT).show();
if (data.get(position).getIsTop() == 1){
Toast.makeText(mContext, " Whether to cancel the overhead ", Toast.LENGTH_SHORT).show();
tvHeaderTop.setText(" Cancel the top ");
}else {
Toast.makeText(mContext, " Whether it is overhead ", Toast.LENGTH_SHORT).show();
tvHeaderTop.setText(" Overhead ");
}
});
}
// If all labels are placed on top , The top button changes to cancel the top , If not , The top button remains unchanged
public void ChangeTopButtonContent(){
List<Integer> list = new ArrayList<>();
for (Note datum : data) {
list.add(datum.getIsTop());
}
if (list != null){
int first = list.get(0);
for (Integer integer : list) {
if(integer.equals(first)){
tvHeaderTop.setText(" Cancel the top ");
}else {
tvHeaderTop.setText(" Overhead ");
}
}
}
}
public void initView(){
headerCancel = (Button) findViewById(R.id.header_cancel);
headerSelectAll = (Button) findViewById(R.id.header_selectAll);
headerTop = (LinearLayout) findViewById(R.id.header_top);
headerDelete = (LinearLayout) findViewById(R.id.header_delete);
tvHeaderTop = (TextView) findViewById(R.id.tv_header_top);
addpic = (ImageView) findViewById(R.id.add_pic);
headerCancel.setOnClickListener(this);
headerSelectAll.setOnClickListener(this);
headerTop.setOnClickListener(this);
headerDelete.setOnClickListener(this);
addpic.setOnClickListener(this);
}
// Return to the perfect state of the home page
public void showHome(){
RecyclerAdapter adapter = new RecyclerAdapter(mContext,data);
adapter.showOrHide(false);
onResume();
}
// Set note top event
public void setThingTop(){
// Traverse all the array contents queried from the database
for (Note datum : data) {
Log.d(TAG, "onClick: " + datum);
// Yes checkbox Click the event to traverse , obtain id
for (String noteId : list){
// Judge the database's id and checkbox Get content id Whether it is equal or not , If equal, proceed to the next step
if (datum.getId().equals(noteId)){
Log.d(TAG, "onClick: -------------------------------------------");
Log.d(TAG, " Get events : " + datum.getContent() + "=>" + datum.getId());
Note n = new Note();
n.setId(datum.getId());
n.setContent(datum.getContent());
n.setRemind(datum.getRemind());
n.setColor(datum.getColor());
n.setCreatedTime(datum.getCreatedTime());
if (tvHeaderTop.getText().toString().equals(" Overhead ")){
n.setIsTop(1);
}else if (tvHeaderTop.getText().toString().equals(" Cancel the top ")){
n.setIsTop(0);
}
mNoteDbHelper.updateData(n);
Log.d(TAG, " To obtain a new Note object :" + n);
Log.d(TAG, "onClick: ---------------------------------------------" );
}
}
}
}
@Override
public void onClick(View view) {
switch (view.getId()){
case R.id.add_pic:
intent = new Intent(this, AddNoteActivity.class);
startActivity(intent);
break;
case R.id.header_cancel:
showHome();
break;
case R.id.header_selectAll:
break;
case R.id.header_top:
setThingTop();
showHome();
break;
case R.id.header_delete:
for (String s : list) {
mNoteDbHelper.deleteFromDbById(s);
}
showHome();
break;
}
}
}
5、 Create database
In order to store data , Create noteSql database , And create note Data sheet , And initialize the database operation in this class CURD Methods .
NoteDbHelper.java
package com.tinno.db;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.text.TextUtils;
import android.util.Log;
import android.widget.Toast;
import com.tinno.bean.Note;
import java.util.ArrayList;
import java.util.List;
/** * Notes Database class */
public class NoteDbHelper extends SQLiteOpenHelper {
private static final String TAG = "NoteDbHelper";
private Context context;
private static final String DB_NAME = "noteSql.db";
private static final String NOTE_TABLE_NAME = "note";
// Database Version
private static final int DATABASE_VERSION =1;
private static final String CREATE_TABLE_SQL = "CREATE TABLE IF NOT EXISTS " + NOTE_TABLE_NAME + " (id INTEGER PRIMARY KEY AUTOINCREMENT, content TEXT, create_time TEXT, remind TEXT, color TEXT,isTop TEXT)";
public NoteDbHelper(Context context){
super(context,DB_NAME,null,DATABASE_VERSION);
this.context = context;
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL(CREATE_TABLE_SQL);
Toast.makeText(context, " Database created successfully ", Toast.LENGTH_SHORT).show();
}
@Override
public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) {
}
/** * Query all contents of the database * @return */
public List<Note> queryAllFromDb(){
SQLiteDatabase db = getWritableDatabase();
List<Note> noteList = new ArrayList<>();
Cursor cursor = db.query(NOTE_TABLE_NAME, null, null, null, null, null, "isTop DESC");
if (cursor != null){
while (cursor.moveToNext()){
String id = cursor.getString(cursor.getColumnIndexOrThrow("id"));
String content = cursor.getString(cursor.getColumnIndexOrThrow("content"));
String createTime = cursor.getString(cursor.getColumnIndexOrThrow("create_time"));
String remind = cursor.getString(cursor.getColumnIndexOrThrow("remind"));
int color = cursor.getInt(cursor.getColumnIndexOrThrow("color"));
int isTop = cursor.getInt(cursor.getColumnIndexOrThrow("isTop"));
Note note = new Note();
note.setId(id);
note.setContent(content);
note.setCreatedTime(createTime);
note.setRemind(remind);
note.setColor(color);
note.setIsTop(isTop);
noteList.add(note);
}
cursor.close();
}
return noteList;
}
public long insertData(Note note){
SQLiteDatabase db = getWritableDatabase();
ContentValues values = new ContentValues();
values.put("content",note.getContent());
values.put("create_time",note.getCreatedTime());
values.put("remind",note.getRemind());
values.put("color",note.getColor());
values.put("isTop",note.getIsTop());
return db.insert(NOTE_TABLE_NAME,null,values);
}
public int deleteFromDbById(String id) {
SQLiteDatabase db = getWritableDatabase();
return db.delete(NOTE_TABLE_NAME, "id like ?", new String[]{
id});
}
public int updateData(Note note) {
SQLiteDatabase db = getWritableDatabase();
ContentValues values = new ContentValues();
values.put("content", note.getContent());
values.put("create_time", note.getCreatedTime());
values.put("remind",note.getRemind());
values.put("color",note.getColor());
values.put("isTop",note.getIsTop());
Log.d(TAG, "updateData: " + values);
return db.update(NOTE_TABLE_NAME, values, "id like ?", new String[]{
note.getId()});
}
public List<Note> queryFromDbByContent(String content) {
if (TextUtils.isEmpty(content)) {
return queryAllFromDb();
}
SQLiteDatabase db = getWritableDatabase();
List<Note> noteList = new ArrayList<>();
Cursor cursor = db.query(NOTE_TABLE_NAME, null, "content like ?", new String[]{
"%"+content+"%"}, null, null, null);
if (cursor != null) {
while (cursor.moveToNext()) {
String id = cursor.getString(cursor.getColumnIndexOrThrow("id"));
String content2 = cursor.getString(cursor.getColumnIndexOrThrow("content"));
String createTime = cursor.getString(cursor.getColumnIndexOrThrow("create_time"));
String remind = cursor.getString(cursor.getColumnIndexOrThrow("remind"));
int color = cursor.getInt(cursor.getColumnIndexOrThrow("color"));
int isTop = cursor.getInt(cursor.getColumnIndexOrThrow("isTop"));
Note note = new Note();
note.setId(id);
note.setContent(content2);
note.setCreatedTime(createTime);
note.setRemind(remind);
note.setColor(color);
note.setIsTop(isTop);
noteList.add(note);
}
cursor.close();
}
return noteList;
}
}
6、 Time initialization
When initializing the note creation （ Data stored in the database ） And the specific time displayed on the page
FormatTime.java
package com.tinno.utils;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
/** * Time tools */
public class FormatTime {
// How to get the current time
public static String getCurrentTimeFormat(){
long currentTime = System.currentTimeMillis();
String timeNow = new SimpleDateFormat("yyyy/MM/dd HH:mm").format(currentTime);
return timeNow;
}
/** * Through the collation of database time , Combined with the current time , Integrate the displayed time * Time display * 1、 today : hh-mm; * 2、 yesterday : yesterday hh-mm; * 3、 Within this week : What day of the week hh-mm; * 4、 Outside this week : nnnn-yy-dd; * @param time The time point of the incoming database storage * @return */
public static String FormatTimeForDb(String time){
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm");
Date date2;
date2 = new Date(System.currentTimeMillis());
int year1 = Integer.parseInt(time.substring(0,4));
int month1 = Integer.parseInt(time.substring(5,7));
int day1 = Integer.parseInt(time.substring(8,10));
int h1 = Integer.parseInt(time.substring(11,13));
int m1 = Integer.parseInt(time.substring(14,16));
// Time now
String str2 = simpleDateFormat.format(date2);
int year2 = Integer.parseInt(str2.substring(0, 4));
int month2 = Integer.parseInt(str2.substring(5, 7));
int day2 = Integer.parseInt(str2.substring(8, 10));
int h2 = Integer.parseInt(str2.substring(11, 13));
int m2 = Integer.parseInt(str2.substring(14, 16));
if (year2 > year1) {
return year1 + "/" + time.substring(5, 7) + "/" + time.substring(8, 10);
} else if (month2 > month1) {
return year1 + "/" + time.substring(5, 7) + "/" + time.substring(8, 10);
} else if (day2 > day1) {
if (day2 - day1 == 1){
return " yesterday " + time.substring(11,13) + ":" + time.substring(14,16);
}else if (day2 - day1 < 7){
return getWeek(time) + " " + time.substring(11,13) + ":" + time.substring(14,16);
}else {
return year1 + "/" + time.substring(5, 7) + "/" + time.substring(8, 10);
}
} else {
return " today " + time.substring(11, 13) + ":" + time.substring(14, 16);
}
}
/** * Get the day of week tool class at the specified time * @param dateTime Enter the specific time that needs to be changed The format is yyyy/MM/dd * @return */
private static int getDayofWeek(String dateTime) {
Calendar cal = Calendar.getInstance();
if (dateTime.equals("")) {
cal.setTime(new Date(System.currentTimeMillis()));
} else {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd", Locale.getDefault());
Date date;
try {
date = sdf.parse(dateTime);
} catch (ParseException e) {
date = null;
e.printStackTrace();
}
if (date != null) {
cal.setTime(new Date(date.getTime()));
}
}
return cal.get(Calendar.DAY_OF_WEEK);
}
/** * Convert the specified time into the specific day of the week displayed * @param time * @return */
public static String getWeek(String time){
int dayofWeek = getDayofWeek(time);
if (1 == dayofWeek){
return " Sunday ";
}else if (2 == dayofWeek){
return " Monday ";
}else if (3 ==dayofWeek){
return " Tuesday ";
}else if (4 == dayofWeek){
return " Wednesday ";
}else if (5==dayofWeek){
return " Thursday ";
}else if (6 == dayofWeek){
return " Friday ";
}else{
return " Saturday ";
}
}
}
7、 Post it skin display and modification
Use popupWindow Control to display the effect of sticky note skin , And set click events for each skin , Monitor clicks and change theme colors
popupWindow Layout popup_theme.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical">
<LinearLayout android:layout_width="320dp" android:layout_height="80dp" android:orientation="horizontal" android:background="@color/menu_background" android:layout_gravity="end" android:layout_marginTop="10dp" android:layout_marginRight="10dp">
<FrameLayout android:id="@+id/theme1" android:layout_width="60dp" android:layout_height="60dp" android:background="@color/menu_theme1" android:layout_gravity="center" android:layout_margin="10dp"/>
<FrameLayout android:id="@+id/theme2" android:layout_width="60dp" android:layout_height="60dp" android:background="@color/menu_theme2" android:layout_gravity="center" android:layout_margin="10dp"/>
<FrameLayout android:id="@+id/theme3" android:layout_width="60dp" android:layout_height="60dp" android:background="@color/menu_theme3" android:layout_gravity="center" android:layout_margin="10dp"/>
<FrameLayout android:id="@+id/theme4" android:layout_width="60dp" android:layout_height="60dp" android:background="@color/menu_theme4" android:layout_gravity="center" android:layout_margin="10dp"/>
</LinearLayout>
</LinearLayout>
effect ：
Code implementation ：
// popupWindow Control and display of
public void showPopupWindow(View view){
View popupView = getLayoutInflater().inflate(R.layout.popup_theme,null);
FrameLayout btn1,btn2,btn3,btn4;
btn1 = popupView.findViewById(R.id.theme1);
btn2 = popupView.findViewById(R.id.theme2);
btn3 = popupView.findViewById(R.id.theme3);
btn4 = popupView.findViewById(R.id.theme4);
PopupWindow popupWindow = new PopupWindow(popupView, ViewGroup.LayoutParams.WRAP_CONTENT,ViewGroup.LayoutParams.WRAP_CONTENT,true);
popupWindow.showAsDropDown(edit_themes);
btn1.setOnClickListener(view1 -> {
content_container.setBackgroundColor(Color.parseColor("#BFC8FD"));
edit_themes.setBackgroundColor(Color.parseColor("#BFC8FD"));
Log.d(TAG, "showPopupWindow: Color ");
popupWindow.dismiss();
});
btn2.setOnClickListener(view1 -> {
content_container.setBackgroundColor(Color.parseColor("#A5EEE5"));
edit_themes.setBackgroundColor(Color.parseColor("#A5EEE5"));
popupWindow.dismiss();
});
btn3.setOnClickListener(view1 -> {
content_container.setBackgroundColor(Color.parseColor("#FCBEBE"));
edit_themes.setBackgroundColor(Color.parseColor("#FCBEBE"));
popupWindow.dismiss();
});
btn4.setOnClickListener(view1 -> {
content_container.setBackgroundColor(Color.parseColor("#FFF195"));
edit_themes.setBackgroundColor(Color.parseColor("#FFF195"));
popupWindow.dismiss();
});
}
8、 Time and date selector
In the edit and add pages , Click the alarm button , Add a reminder time , eject 3 individual dialog, The first is the memo reminder text , Click OK to pop up the date selector , After select date , The selected date appears in the date box above , Click the confirm button , Pop up the time selector , Click to confirm the city , above textView The selected date and time appear .
First complete a layout for the date and time selector , Based on this layout, a dialog The pop-up window of
dialog_date_select.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_gravity="center_horizontal" android:gravity="center_horizontal">
<TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/set_alarm_title" android:textStyle="bold" android:textSize="20sp" android:typeface="serif" android:layout_marginTop="5dp" android:textColor="@color/black"/>
<LinearLayout android:layout_width="match_parent" android:layout_height="30dp" android:gravity="center">
<TextView android:id="@+id/dds_time" android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center" android:text=" Time (10:55)" android:textSize="16sp" android:layout_weight="1" />
<TextView android:id="@+id/dds_date" android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center" android:text=" date (06/27)" android:layout_weight="1" android:textSize="16sp" />
</LinearLayout>
<DatePicker android:id="@+id/date_picker" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="5dp" android:spinnersShown="false" />
<TimePicker android:id="@+id/time_picker" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="5dp" />
</LinearLayout>
effect ：
Implementation code
// Pop up a dialog
public void showDialog(){
final EditText message = new EditText(this);
message.setPadding(10,10,10,10);
message.setTextColor(Color.BLACK);
message.setBackgroundColor(Color.WHITE);
TextView title = new TextView(this);
title.setText(" Notes to remind ");
title.setPadding(10,10,10,10);
title.setGravity(Gravity.CENTER);
title.setTextColor(Color.BLACK);
title.setTextSize(26);
title.setBackgroundColor(Color.parseColor("#F2F2F2"));
AlertDialog dialog = new AlertDialog.Builder(this)
.setView(message)
.setCustomTitle(title)
.setNeutralButton(" Enter the memo ", null)
.setPositiveButton(" confirm ",null)
.create();
dialog.show();
// Enter the memo button
dialog.getButton(AlertDialog.BUTTON_NEUTRAL).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
dialog.dismiss();
}
});
// OK button
dialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(context, " Get the contents of the input box ：" + message.getText().toString(), Toast.LENGTH_SHORT).show();
showDate();
//Toast.makeText(context, " confirm button ", Toast.LENGTH_SHORT).show();
}
});
}
// Initialize the date and time selector layout
public void initShowDateView(){
v = View.inflate(context,R.layout.dialog_date_select,null);
datePicker = (DatePicker) v.findViewById(R.id.date_picker);
timePicker = (TimePicker) v.findViewById(R.id.time_picker);
ddsDate = (TextView) v.findViewById(R.id.dds_date);
ddsTime = (TextView) v.findViewById(R.id.dds_time);
}
// Date Pickers
public void showDate(){
// Initialize control
initShowDateView();
// Remove the unnecessary time selection control here
((ViewGroup)v).removeView(timePicker);
AlertDialog alertDialog = new AlertDialog.Builder(context)
.setView(v)
.setNeutralButton(getString(R.string.cancel),null)
.setPositiveButton(getString(R.string.sure),null)
.create();
alertDialog.show();
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
year = calendar.get(Calendar.YEAR);
month = calendar.get(Calendar.MONTH);
day = calendar.get(Calendar.DAY_OF_MONTH);
/** * // Initialize the date selector and set the date change listener * datePicker.init(year, month, day, new DatePicker.OnDateChangedListener() { * @Override * public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth) { * // Get the selected date * DataPickerActivity.this.year = year; * // From the month 0 At the beginning * DataPickerActivity.this.month = (monthOfYear+1); * DataPickerActivity.this.day = dayOfMonth; * // Popup window display * Toast.makeText(DataPickerActivity.this,DataPickerActivity.this.year+" year "+DataPickerActivity.this.month+" month "+DataPickerActivity.this.day+" Japan ",Toast.LENGTH_SHORT).show(); * } * }); */
// Set listener , Monitor data changes
datePicker.init(year, month, day, (datePicker1, i, i1, i2) -> {
this.year = i;
this.month = i1 + 1;
this.day = i2;
//Toast.makeText(context, "i=>" + i + "<=> i1 <=>" + i1 + "<=> i2 <=>" + i2, Toast.LENGTH_SHORT).show();
//Toast.makeText(context, year + "/" + month + "/" + day, Toast.LENGTH_SHORT).show();
ddsDate.setText(year+"/"+month+"/"+day);
//EditNoteActivity.this.ddsDate.setText(dateStr);
});
//Toast.makeText(EditNoteActivity.this, year + "/" + month + "/" + day, Toast.LENGTH_SHORT).show();
alertDialog.getButton(AlertDialog.BUTTON_NEUTRAL).setOnClickListener(view -> {
alertDialog.dismiss();
});
alertDialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(view -> {
showTime();
//Toast.makeText(context, " Time selector ", Toast.LENGTH_SHORT).show();
});
}
// Time selector
public void showTime(){
initShowDateView();
// Remove the time selector and date selector before adding the time selector
((ViewGroup)v).removeView(datePicker);
((ViewGroup)v).removeView(timePicker);
((ViewGroup)v).addView(timePicker);
AlertDialog dialog = new AlertDialog.Builder(context)
.setView(v)
.setNeutralButton(getString(R.string.cancel),null)
.setPositiveButton(getString(R.string.sure),null)
.create();
dialog.show();
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
timePicker.setIs24HourView(true);
timePicker.setCurrentHour(calendar.get(Calendar.HOUR_OF_DAY));
timePicker.setCurrentMinute(Calendar.MINUTE);
// Cancel button
dialog.getButton(AlertDialog.BUTTON_NEUTRAL).setOnClickListener(view -> {
dialog.dismiss();
});
// confirm button
dialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(view -> {
String CurrentHour = timePicker.getCurrentHour().toString();
String CurrentMinute = timePicker.getCurrentMinute().toString();
if (timePicker.getCurrentHour() >= 0 && timePicker.getCurrentHour() <= 9) {
CurrentHour = "0" + timePicker.getCurrentHour() ;
}
if (timePicker.getCurrentMinute() >= 0 && timePicker.getCurrentMinute() <= 9) {
CurrentMinute = "0" + timePicker.getCurrentMinute();
}
StringBuffer sb = new StringBuffer();
sb.append(String.format("%d/%02d/%02d",
datePicker.getYear(),
datePicker.getMonth() + 1,
datePicker.getDayOfMonth()));
sb.append(" ");
sb.append(CurrentHour)
.append(":")
.append(CurrentMinute);
String ttime = sb.toString();
String[] s = ttime.split(" ");
//Toast.makeText(context, Arrays.toString(s), Toast.LENGTH_SHORT).show();
//Toast.makeText(context, "date ==> "+ s[0] + "<==> time ==> " + s[1], Toast.LENGTH_SHORT).show();
// Cut the date and time , And copy the corresponding value to the corresponding control
ddsDate.setText(s[0]);
ddsTime.setText(s[1]);
Note n = new Note();
n.setId(note.getId());
n.setCreatedTime(note.getCreatedTime());
n.setColor(note.getColor());
n.setContent(note.getContent());
n.setIsTop(note.getIsTop());
n.setRemind(ttime);
Log.d(TAG, " Get the value of ： " + n);
mNoteDbHelper = new NoteDbHelper(this);
mNoteDbHelper.updateData(n);
finish();
});
}
9、 Long press the editing function
On the home page , Long press one item, Four edit buttons and multiple selection buttons appear , You can top up the homepage notes 、 Delete and other functions
Delete function
Implementation code ：
First, long press a control to show and hide functions
@Override public void onBindViewHolder(@NonNull RecyclerViewHolder holder, int position) { Note note = mBeanList.get(position); holder.mTvCreateTime.setText(FormatTime.FormatTimeForDb(note.getCreatedTime())); holder.mTvContent.setText(note.getContent()); holder.lrContainer.setBackgroundColor(note.getColor()); // Set the long press click event for the control holder.lrContainer.setOnLongClickListener(new View.OnLongClickListener() { @Override public boolean onLongClick(View view) { // Yes flag Make a self increasing , When flag From the beginning of clicking , When flag yes 2 The divisor of ,showIcon Set up false, On the contrary, set it to true; flag++; Log.d(TAG, "showIcon " + showIcon); // Set all variables , When long press and click , The status changes to true, And call notifyItemRangeChanged(int positionStart,int itemCount) Method to refresh from the specified location , How many to refresh //Toast.makeText(mContext, "showIcon The state of " + showIcon, Toast.LENGTH_SHORT).show(); if (flag % 2 == 0 ){ showIcon = false; }else { showIcon = true; } showOrHide(showIcon); //Toast.makeText(mContext, " Get the item Of id" + mBeanList.get(position), Toast.LENGTH_SHORT).show(); notifyItemRangeChanged(0,mBeanList.size()); return true; } }); // Judge showIcon Is the state of true, by true When ,checkbox Show , Anyway, it's hidden holder.mCheckBox.setVisibility(showIcon ? VISIBLE : View.GONE); ...... ...... ...... }// obtain MainActivity Control in , And show and hide the control public void showOrHide(boolean isShow){ mNoteAdd = ((MainActivity) mContext).findViewById(R.id.id_note_add); mNoteBottom = ((MainActivity) mContext).findViewById(R.id.id_note_bottom); noteToolbar = ((MainActivity) mContext).findViewById(R.id.id_note_toolbar); if (isShow){ mNoteAdd.setVisibility(View.GONE); mNoteBottom.setVisibility(VISIBLE); noteToolbar.setVisibility(VISIBLE); }else { mNoteAdd.setVisibility(VISIBLE); mNoteBottom.setVisibility(View.GONE); noteToolbar.setVisibility(View.GONE); } }stay
RecyclerAdapterCustomize an interface in , Used to receive click events of multiple selection boxes .public class RecyclerViewHolder extends RecyclerView.ViewHolder { private TextView mTvCreateTime; private TextView mTvContent; private ImageView mTvRemind,mIvTopTab; private ViewGroup lrContainer; private LinearLayout recycler_background; private CheckBox mCheckBox; public RecyclerViewHolder(@NonNull View itemView) { super(itemView); mTvCreateTime = itemView.findViewById(R.id.tv_time); mTvContent = itemView.findViewById(R.id.tv_content); mTvRemind = itemView.findViewById(R.id.iv_remind); lrContainer = itemView.findViewById(R.id.lr_list_container); mCheckBox = itemView.findViewById(R.id.checkbox); recycler_background = itemView.findViewById(R.id.recycler_background); mIvTopTab = itemView.findViewById(R.id.iv_topTab); // Click event of multiple selection boxes mCheckBox.setOnClickListener(view -> { if (mCheckBox.isChecked()){ mOnItemClickListener.onRecyclerItemClick(getAdapterPosition()); } }); } } private OnRecyclerItemClickListener mOnItemClickListener; // Set the method of listening public void setRecyclerItemClickListener(OnRecyclerItemClickListener listener){ mOnItemClickListener = listener; } // Customize a listener public interface OnRecyclerItemClickListener{ void onRecyclerItemClick(int position); }stay
MainActivity.javaIn order to get RecyclerView in CheckBox Contents of the selection box// obtain RecyclerView in checkBox Contents of the selection box public void show(){ list = new ArrayList<>(); mRecyclerAdapter.setRecyclerItemClickListener(position -> { list.add(data.get(position).getId()); Log.d(TAG, "show: " + list); //Toast.makeText(mContext, " Whether it is overhead " + data.get(position).getIsTop(), Toast.LENGTH_SHORT).show(); if (data.get(position).getIsTop() == 1){ Toast.makeText(mContext, " Whether to cancel the overhead ", Toast.LENGTH_SHORT).show(); tvHeaderTop.setText(" Cancel the top "); }else { Toast.makeText(mContext, " Whether it is overhead ", Toast.LENGTH_SHORT).show(); tvHeaderTop.setText(" Overhead "); } });Return to an original state of the home page
// Return to the perfect state of the home page public void showHome(){ RecyclerAdapter adapter = new RecyclerAdapter(mContext,data); adapter.showOrHide(false); onResume(); }In the click button , Calling method , Get the checkbox The data of id, Perform a data deletion
@Override
public void onClick(View view) {
switch (view.getId()){
....
....
case R.id.header_delete:
for (String s : list) {
mNoteDbHelper.deleteFromDbById(s);
}
showHome()
break;
}
}
Overhead function
Implementation code
@Override
public void onBindViewHolder(@NonNull RecyclerViewHolder holder, int position) {
Note note = mBeanList.get(position);
holder.mTvCreateTime.setText(FormatTime.FormatTimeForDb(note.getCreatedTime()));
holder.mTvContent.setText(note.getContent());
holder.lrContainer.setBackgroundColor(note.getColor());
......
......
......
// Set the top tag for the content of the top memo
if (noteList.get(position).getIsTop() == 1){
holder.mIvTopTab.setVisibility(VISIBLE);
}else if (noteList.get(position).getIsTop() == 0){
holder.mIvTopTab.setVisibility(View.INVISIBLE);
}
}
// Set note top event
public void setThingTop(){
// Traverse all the array contents queried from the database
for (Note datum : data) {
Log.d(TAG, "onClick: " + datum);
// Yes checkbox Click the event to traverse , obtain id
for (String noteId : list){
// Judge the database's id and checkbox Get content id Whether it is equal or not , If equal, proceed to the next step
if (datum.getId().equals(noteId)){
Log.d(TAG, "onClick: -------------------------------------------");
Log.d(TAG, " Get events : " + datum.getContent() + "=>" + datum.getId());
Note n = new Note();
n.setId(datum.getId());
n.setContent(datum.getContent());
n.setRemind(datum.getRemind());
n.setColor(datum.getColor());
n.setCreatedTime(datum.getCreatedTime());
if (tvHeaderTop.getText().toString().equals(" Overhead ")){
n.setIsTop(1);
}else if (tvHeaderTop.getText().toString().equals(" Cancel the top ")){
n.setIsTop(0);
}
mNoteDbHelper.updateData(n);
Log.d(TAG, " To obtain a new Note object :" + n);
Log.d(TAG, "onClick: ---------------------------------------------" );
}
}
}
}
@Override
public void onClick(View view) {
switch (view.getId()){
....
....
case R.id.header_top:
setThingTop();
showHome();
break;
....
....
}
}
10、 The note with alarm function set for the note in the home page displays a small alarm icon
stay
RecyclerAdapter@Override public void onBindViewHolder(@NonNull RecyclerViewHolder holder, int position) { Note note = mBeanList.get(position); holder.mTvCreateTime.setText(FormatTime.FormatTimeForDb(note.getCreatedTime())); holder.mTvContent.setText(note.getContent()); holder.lrContainer.setBackgroundColor(note.getColor()); ...... ...... ...... // Judge whether the alarm clock reminder time is set , If the reminder time is not set , Hide the alarm icon NoteDbHelper noteDbHelper = new NoteDbHelper(mContext); List<Note> noteList = noteDbHelper.queryAllFromDb(); if (TextUtils.isEmpty(noteList.get(position).getRemind())){ //Log.d(TAG, "onBindViewHolder: " + 123); holder.mTvRemind.setVisibility(View.GONE); }else { holder.mTvRemind.setVisibility(VISIBLE); holder.mTvRemind.setOnClickListener(view -> { showDialog(noteList.get(position).getRemind()); }); } ...... ...... ...... }// Click the alarm clock icon , Pop up a dialog, Used to display the content and time of the prompt public void showDialog(String str){ AlertDialog dialog = new AlertDialog.Builder(mContext) .setTitle(" Event reminder ") .setMessage(str + "\n" + str) .create(); dialog.show(); }effect
The whole code （Demo）
gitee Address ：https://gitee.com/SmellWang/sticky_-note.git
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