1、主界面实现
(1)当点击下方的添加按钮会进入编辑界面
实现代码:
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent=new Intent(MainActivity.this,CreateNewNoteActivity.class);
startActivity(intent);
}
});
(2)当点击右上角的放大镜会对所有便签进行搜索
实现代码:
public void showNotes(String str){
Cursor cursor=db.rawQuery("select * from notes where title like '%"+str+"%'",null);
if(cursor.moveToFirst()){
do {
int nid=cursor.getInt(0);
String ntitle=cursor.getString(1);
String nbody=cursor.getString(2);
String date=cursor.getString(3);
Note note=new Note(nid,ntitle,nbody,date);
noteList.add(note);
}while (cursor.moveToNext());
}
}
2、便签编辑界面
(1)当点击保存时,此数据便会插入数据库当中,并且获取当前时间
实现代码:
public void bindListening(){
saveButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String title=titleEdit.getText().toString();
String body=bodyEdit.getText().toString();
SimpleDateFormat simpleDateFormat=new SimpleDateFormat("yyyy.MM.dd HH:m");
Date date=new Date(System.currentTimeMillis());
String cdate=simpleDateFormat.format(date);
db.execSQL("insert into notes(title,body,date) values('"+title+"','"+body+"','"+cdate+"')");
Toast.makeText(CreateNewNoteActivity.this,"添加成功!",Toast.LENGTH_SHORT).show();
MainActivity.myHandler.sendEmptyMessage(0x123);
finish();
}
});
(2)当点击删除时,此数据便会从数据库中移出
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if(id==R.id.ed_delete){
db=dbHelper.getWritableDatabase();
db.execSQL("delete from notes where id="+this.id);
Message message=new Message();
message.arg1=position;
message.what=0x125;
MainActivity.myHandler.sendMessage(message);
finish();
}
return super.onOptionsItemSelected(item);
}
(3)当重新打开便签,并对内容进行修改保存,则会重新获取时间提示修改成功。
public void bindListening(){
saveButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
db=dbHelper.getWritableDatabase();
String title=titleEdit.getText().toString();
String body=bodyEdit.getText().toString();
SimpleDateFormat simpleDateFormat=new SimpleDateFormat("yyyy.MM.dd. HH:mm");
Date date=new Date(System.currentTimeMillis());
String cdate=simpleDateFormat.format(date);
db.execSQL("update notes set title=?,body=?,date=? where id="+id,new String[]{title,body,cdate});
Toast.makeText(EditNoteActivity.this,"修改成功!",Toast.LENGTH_SHORT).show();
Note note=new Note(id,title,body,cdate);
Message message=new Message();
message.what=0x124;
message.obj=note;
message.arg1=position;
MainActivity.myHandler.sendMessage(message);
finish();
}
});
3、便签搜索界面
实现代码:
public void showNotes(String str){
Cursor cursor=db.rawQuery("select * from notes where title like '%"+str+"%'",null);
if(cursor.moveToFirst()){
do {
int nid=cursor.getInt(0);
String ntitle=cursor.getString(1);
String nbody=cursor.getString(2);
String date=cursor.getString(3);
Note note=new Note(nid,ntitle,nbody,date);
noteList.add(note);
}while (cursor.moveToNext());
}
}
UI美化