Android记事本NotePad应用功能拓展（二）

一、实现功能

1.NotaPad添加代办功能

2.点击待办事件添加计划Plan

3.点击记事本添加备忘录

二、项目代码分析

1.点击待办事件添加计划Plan

点击待办事件

String title = data.getExtras().getString("title", null);             String content = data.getExtras().getString("content", null);             String time = data.getExtras().getString("time", null);             Plan newPlan = new Plan(title, content, time);             com.example.atry.Alarm.CRUD op = new com.example.atry.Alarm.CRUD(context);             op.open();             op.addPlan(newPlan);             Log.d(TAG, "onActivityResult: "+ time);             op.close(); 

相关类分析

CRUD：对计划Plan的增删改查进行封装

EditAlarmActivity：对计划Plan细小操作的实现

PlanAdapter：连接Plan数据库的适配器接口

PlanDatabase：Plan数据库的具体实现

PlanAdapter

package com.example.atry.Alarm; import android.content.Context; import android.content.SharedPreferences; import android.preference.PreferenceManager; import android.text.TextUtils; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.Filter; import android.widget.Filterable; import android.widget.TextView; import com.example.atry.R; import java.util.ArrayList; import java.util.List; public class PlanAdapter extends BaseAdapter implements Filterable { private Context mContext; private List<Plan> backList;//用来备份原始数据 private List<Plan> planList;//这个数据是会改变的，所以要有个变量来备份一下原始数据     PlanAdapter.MyFilter mFilter; public PlanAdapter(Context mContext, List<Plan> planList) { this.mContext = mContext; this.planList = planList;         backList = planList; } @Override public int getCount() { return planList.size(); } @Override public Object getItem(int position) { return planList.get(position); } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) {         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(mContext);         mContext.setTheme((sharedPreferences.getBoolean("nightMode", false)? R.style.NightTheme: R.style.DayTheme));         View v = View.inflate(mContext, R.layout.plan_layout, null);         TextView tv_title = (TextView)v.findViewById(R.id.tv_title);         TextView tv_content = (TextView)v.findViewById(R.id.tv_content);         TextView tv_time = (TextView)v.findViewById(R.id.tv_time); //Set text for TextView         tv_title.setText(planList.get(position).getTitle());         tv_content.setText(planList.get(position).getContent());         tv_time.setText(planList.get(position).getTime()); //Save plan id to tag         v.setTag(planList.get(position).getId()); return v; } @Override public Filter getFilter() { if (mFilter ==null){             mFilter = new PlanAdapter.MyFilter(); } return mFilter; } class MyFilter extends Filter { //我们在performFiltering(CharSequence charSequence)这个方法中定义过滤规则 @Override protected FilterResults performFiltering(CharSequence charSequence) {             FilterResults result = new FilterResults();             List<Plan> list; if (TextUtils.isEmpty(charSequence)) {//当过滤的关键字为空的时候，我们则显示所有的数据                 list = backList; } else {//否则把符合条件的数据对象添加到集合中                 list = new ArrayList<>(); for (Plan plan : backList) { if (plan.getTitle().contains(charSequence) || plan.getContent().contains(charSequence)) {                         list.add(plan); } } }             result.values = list; //将得到的集合保存到FilterResults的value变量中             result.count = list.size();//将集合的大小保存到FilterResults的count变量中 return result; } //在publishResults方法中告诉适配器更新界面 @Override protected void publishResults(CharSequence charSequence, FilterResults filterResults) {             planList = (List<Plan>)filterResults.values; if (filterResults.count>0){ notifyDataSetChanged();//通知数据发生了改变 }else { notifyDataSetInvalidated();//通知数据失效 } } } } 

2.点击记事本事件添加笔记Note

点击记事本事件

String content = data.getExtras().getString("content");             String time = data.getExtras().getString("time"); int tag = data.getExtras().getInt("tag", 1);             Note newNote = new Note(content, time, tag);             CRUD op = new CRUD(context);             op.open();             op.addNote(newNote);             op.close();             achievement.addNote(content); 

相关类分析

CRUD：对计划Note的增删改查进行封装

EditActivity：对计划Note细小操作的实现

NoteAdapter：连接Note数据库的适配器接口

NoteDatabase：Note数据库的具体实现

NoteAdapter

package com.example.atry; import android.content.Context; import android.content.SharedPreferences; import android.preference.PreferenceManager; import android.text.TextUtils; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.Filter; import android.widget.Filterable; import android.widget.TextView; import java.util.ArrayList; import java.util.List; public class NoteAdapter extends BaseAdapter implements Filterable { private Context mContext; private List<Note> backList;//用来备份原始数据 private List<Note> noteList;//这个数据是会改变的，所以要有个变量来备份一下原始数据 private MyFilter mFilter; public NoteAdapter(Context mContext, List<Note> noteList) { this.mContext = mContext; this.noteList = noteList;         backList = noteList; } @Override public int getCount() { return noteList.size(); } @Override public Object getItem(int position) { return noteList.get(position); } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) {         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(mContext);         mContext.setTheme((sharedPreferences.getBoolean("nightMode", false)? R.style.NightTheme: R.style.DayTheme));         View v = View.inflate(mContext, R.layout.note_layout, null);         TextView tv_content = (TextView)v.findViewById(R.id.tv_content);         TextView tv_time = (TextView)v.findViewById(R.id.tv_time); //Set text for TextView         String allText = noteList.get(position).getContent(); if (sharedPreferences.getBoolean("noteTitle" ,true))             tv_content.setText(allText.split("n")[0]); else tv_content.setText(allText);         tv_time.setText(noteList.get(position).getTime()); //Save note id to tag         v.setTag(noteList.get(position).getId()); return v; } @Override public Filter getFilter() { if (mFilter ==null){             mFilter = new MyFilter(); } return mFilter; } class MyFilter extends Filter { //我们在performFiltering(CharSequence charSequence)这个方法中定义过滤规则 @Override protected FilterResults performFiltering(CharSequence charSequence) {             FilterResults result = new FilterResults();             List<Note> list; if (TextUtils.isEmpty(charSequence)) {//当过滤的关键字为空的时候，我们则显示所有的数据                 list = backList; } else {//否则把符合条件的数据对象添加到集合中                 list = new ArrayList<>(); for (Note note : backList) { if (note.getContent().contains(charSequence)) {                         list.add(note); } } }             result.values = list; //将得到的集合保存到FilterResults的value变量中             result.count = list.size();//将集合的大小保存到FilterResults的count变量中 return result; } //在publishResults方法中告诉适配器更新界面 @Override protected void publishResults(CharSequence charSequence, FilterResults filterResults) {             noteList = (List<Note>)filterResults.values; if (filterResults.count>0){ notifyDataSetChanged();//通知数据发生了改变 }else { notifyDataSetInvalidated();//通知数据失效 } } } } 

四、参考资料

相关参考：Android记事本NotePad应用功能拓展（一）
作者GitHub下载链接：https://github.com/KangKangBigWorld/Android/tree/master/Mid_Test