我是Android新手，也是英语新手，抱歉我的英语不好... 我已经在该学院学习了android课程。 我的句子可能是错误的，因为它是通过翻译写的。希望您能宽容地理解。
这就是我想要的：
如果我在日历视图中单击15天， 希望Recyclerview中仅显示第15天的信息。如果我在calenderview中单击另一个日期（例如20天），希望第15个项目消失并且仅显示第20个项目视图。
这就是我想要做的。 当我单击日历视图中的日期时，我想查看与该日期相对应的项目视图。
打包com.example.myapplication;
import android.app.Activity; 导入android.content.Context; 导入android.content.Intent; 导入android.content.SharedPreferences; 导入android.icu.util.Calendar; 导入android.support.v7.app.AlertDialog; 导入android.support.v7.app.AppCompatActivity; 导入android.os.Bundle; 导入android.support.v7.widget.DividerItemDecoration; 导入android.support.v7.widget.LinearLayoutManager; 导入android.support.v7.widget.RecyclerView; 导入android.util.Log; 导入android.view.LayoutInflater; 导入android.view.View; 导入android.widget.Button; 导入android.widget.CalendarView; 导入android.widget.EditText; 导入android.widget.TextView; 导入android.widget.Toast;
import java.text.SimpleDateFormat; 导入java.util.ArrayList; 导入java.util.Date;
公共类Calender扩展了AppCompatActivity {
// CalendarView myCalenderView;
// TextView schedule1, schedule11;
String a, b, c;
static String data1;
long Now;
Date date;
java.text.SimpleDateFormat mFormat = new SimpleDateFormat("YYYY_MM_dd");
TextView datetext;
Context mcontext;
private String getTime() {
Now = System.currentTimeMillis();
date = new Date(Now);
return mFormat.format(date);
}
private ArrayList<calenderArrayList> mArrayList = new ArrayList<>();
private ArrayList<calenderArrayList> bArrayList = new ArrayList<>();
SharedPreferences preferences;
SharedPreferences.Editor editor;
private static String TAG = "recyclerview_example";
//private ArrayList<calenderArrayList> mArrayList;
//ArrayList 선언
calendarAdapter mAdapter = new calendarAdapter(this, mArrayList);
//mAdapter 선언
// calendarAdapter bAdapter = new calendarAdapter(this, bArrayList);
private RecyclerView mRecyclerView;
private LinearLayoutManager mLinearLayoutManager;
private int count = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_calender);
Log.d("스케쥴선택액티비티", "OnCreate()실행");
SharedPreferences calender_load = getSharedPreferences("calender", MODE_PRIVATE);
calender_load.getInt("save_size", 0);
int calender_size = calender_load.getInt("save_size", 0);
Log.d("시작시b사이즈1", "" + calender_size);
Log.d("시작시b사이즈1", "" + bArrayList.size());
Log.d("시작시m사이즈1", "" + mArrayList.size());
if (calender_size != 0) {
for (int i = 0; i < calender_size; i++) {
calenderArrayList calender = new calenderArrayList(calender_load.getString("save_date" + i, ""), calender_load.getString("save_work" + i, ""), calender_load.getString("save_place" + i, ""), calender_load.getBoolean("save_box" + i, false));
if (calender.number_exam.equals(data1)) {
Log.d("불러오기값", "" + calender_load.getString("save_date" + i, ""));
bArrayList.add(calender);
mArrayList.add(calender);
}
mAdapter = new calendarAdapter(this, mArrayList);
mAdapter.notifyDataSetChanged();
}
} else if (calender_size == 0) {
mAdapter = new calendarAdapter(this, mArrayList);
mAdapter.notifyDataSetChanged();
}
mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view_exam);
//recycler_view라는 id를 가진 recycler_view를 mRecyclerView로 지정해준다.
mRecyclerView.addItemDecoration(new DividerItemDecoration(mRecyclerView.getContext(), 1));
mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
//RecyclerView 내에 Item view들의 크기를 측정하고 위치를 지정
//언제 item view를 재사용해야하는지에 대한 정책을 결정하고 결정.
//mArrayList = new ArrayList<>();
mAdapter = new calendarAdapter(this, mArrayList);
//RecyclerView 내에 보여지는 view 들에 date set을 binding 시켜주는 역할.
//binding? 데이터 끼리 묵어준다?
mRecyclerView.setAdapter(mAdapter);
//mRecyclerView의 Adapter를 mAdapter로 set한다.
//set? 지정한다. 놓다. 위치하다.
// myCalenderView = (CalendarView) findViewById(R.id.calendar);
}
@Override
protected void onStart() {
// TODO Auto-generated method stub
super.onStart();
// Toast.makeText(getApplicationContext(), "onStart()", Toast.LENGTH_SHORT).show();
Log.d("스케쥴선택액티비티", "OnStart()실행");
Log.d("스케쥴선택액티비티", "OnResume()실행");
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
// Toast.makeText(getApplicationContext(), "onResume()", Toast.LENGTH_SHORT).show();
final CalendarView calendar = (CalendarView) findViewById(R.id.calendar);
calendar.setOnDateChangeListener(new CalendarView.OnDateChangeListener() {
@Override
public void onSelectedDayChange(CalendarView view, int year, int month, int dayOfMonth) {
data1 = year + "/" + (month + 1) + "/" + dayOfMonth;
String a = data1 + dayOfMonth;
Log.d("날짜", "" + a);
ArrayList<calenderArrayList> dayofMonth = new ArrayList<>();
Log.d("어떤 이름으로?", "" + dayofMonth);
if (dayofMonth.size() != 0) {
SharedPreferences load = getSharedPreferences("" + data1, MODE_PRIVATE);
}
/* if(mArrayList.size()!=0) {
for (int i=0; i<mArrayList.size() ; i++) {
SharedPreferences save11 = getSharedPreferences("save", MODE_PRIVATE );
SharedPreferences.Editor save_editor = save11.edit();
save_editor.putBoolean("save_box"+i+mArrayList.get(i).number_exam, mArrayList.get(i).selected );
save_editor.putString("save_date"+i+mArrayList.get(i).number_exam, mArrayList.get(i).number_exam);
save_editor.putString("save_work"+i+mArrayList.get(i).number_exam, mArrayList.get(i).content_exam);
save_editor.putString("save_place"+i+mArrayList.get(i).number_exam, mArrayList.get(i).content_exam2);
save_editor.putInt("save_size"+mArrayList.get(i).number_exam, mArrayList.size());
save_editor.commit();
}
}
mArrayList.clear();
if(mArrayList.size()!=0)
{
for (int i =0; i<mArrayList.size(); i++){
if(mArrayList.get(i).number_exam.equals(data1)){
}
}
}*/
//int a = dayOfMonth;
Toast.makeText(Calender.this, year + "/" + (month + 1) + "/" + dayOfMonth, Toast.LENGTH_SHORT).show();
Log.d("리사이클러뷰 실행 전", "실행 전");
mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view_exam);
Log.d("리사이클러뷰 실행 후", "실행 후");
final EditText number_exam = (EditText) view.findViewById(R.id.calender_date);
final EditText content_exam = (EditText) view.findViewById(R.id.calender_place);
final EditText content_exam2 = (EditText) view.findViewById(R.id.calender_content);
//TextView ee = findViewById(R.id.number_exam);
Log.d("사이즈 측정 실행 전", "실행 전");
ArrayList<calenderArrayList> calenderArrayLists = new ArrayList<>();
Log.d("실행11111", mAdapter.getItemCount() + "");
Log.d("뭐가 들어있나?", "" + mArrayList);
Log.d("뭐가 들어있나?", "" + mArrayList.size());
// Log.d("뭐가 들어았나?", ""+mArrayList.get(1).number_exam.toString());
// Log.d("뭐가 들어았나?", ""+mArrayList.get(2).number_exam.toString());
// Log.d("뭐가 들어았나?", ""+mArrayList.get(3).number_exam.toString());
if (mArrayList.size() != 0) {
Log.d("if구문 실행됨?", "" + mArrayList.size());
//1. 일단 뷰 자체를 초기화 해주어야함.
//2. 초기화 된 뷰에 다시 mArrayList에서 선정 된 정보를 다시 나타내주어야한다.
/* for(int i = 0; i<mArrayList.size(); i++){
Log.d("얼마?", ""+i);
Log.d("for 구문 작동?실행", "여기까진 접속?");
if(mArrayList.get(i).number_exam.toString().contains(a)){
Log.d("뭐가 들어있나? 실행여부", ""+mArrayList.get(i).number_exam.toString());
a = mArrayList.get(i).number_exam;
b = mArrayList.get(i).content_exam;
c = mArrayList.get(i).content_exam2;
//mArrayList.add(mArrayList.get(i));
}
}*/
}
}
});
Button buttonInsert_exam = (Button) findViewById(R.id.exam_button);
//button 클릭시 발생하는 이벤트를 나타낸다. 여기서는 입력하기 버튼 클릭시 발생하는 상황.
buttonInsert_exam.setOnClickListener(
new View.OnClickListener() {
@Override
public void onClick(View v) {
AlertDialog.Builder builder = new AlertDialog.Builder(Calender.this);
View view = LayoutInflater.from(Calender.this)
.inflate(R.layout.activity_calender_edit_box, null, false);
builder.setView(view);
final Button ButtonSubmit_exam = (Button) view.findViewById(R.id.button_dialog_submit_exam);
final EditText number_exam = (EditText) view.findViewById(R.id.calender_date);
final EditText content_exam = (EditText) view.findViewById(R.id.calender_place);
final EditText content_exam2 = (EditText) view.findViewById(R.id.calender_content);
// final EditText editTextKorean = (EditText) view.findViewById(R.id.edittext_dialog_korean);
ButtonSubmit_exam.setText("입력하기");
number_exam.setText(data1);
final AlertDialog dialog = builder.create();
dialog.show();
//dialog에 나타나는 입력하기 버튼을 눌렀을 때 발생하는 상황
ButtonSubmit_exam.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
String strID = number_exam.getText().toString();
String strID2 = content_exam.getText().toString();
String strID3 = content_exam2.getText().toString();
//number와 content view에 입력한 문자열을 strID, strID2에 담는다.
//String strKorean = editTextKorean.getText().toString();
calenderArrayList dict = new calenderArrayList(strID, strID2, strID3);
bArrayList.add(0, dict);
mArrayList.add(0, dict); //첫 줄에 삽입
//mArrayList.add(dict); //마지막 줄에 삽입
mAdapter.notifyDataSetChanged(); //변경된 데이터를 화면에 반영
Log.d("b사이즈", "" + bArrayList.size());
Log.d("m사이즈", "" + mArrayList.size());
dialog.dismiss();
//dialog를 종료 시켜준다.
}
});
}
});
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
// Toast.makeText(getApplicationContext(), "onPause()", Toast.LENGTH_SHORT).show();
SharedPreferences calendersave = getSharedPreferences("calender", MODE_PRIVATE);
SharedPreferences.Editor calendersaveeditor = calendersave.edit();
//calenderArrayList calenderArrayList = new calenderArrayList();
if (bArrayList.size() != 0) {
for (int i = 0; i < bArrayList.size(); i++) {
calendersaveeditor.putBoolean("save_box" + i, bArrayList.get(i).selected);
calendersaveeditor.putString("save_date" + i, bArrayList.get(i).number_exam);
calendersaveeditor.putString("save_work" + i, bArrayList.get(i).content_exam);
calendersaveeditor.putString("save_place" + i, bArrayList.get(i).content_exam2);
calendersaveeditor.putInt("save_size", bArrayList.size());
calendersaveeditor.commit();
Log.d("종료시b사이즈", "" + bArrayList.size());
Log.d("종료시m사이즈", "" + mArrayList.size());
}
} else if (bArrayList.size() == 0) {
calendersaveeditor.clear();
calendersaveeditor.commit();
}
Log.d("스케쥴선택액티비티", "OnPause()실행");
}
@Override
protected void onStop() {
// TODO Auto-generated method stub
super.onStop();
// Toast.makeText(getApplicationContext(), "onStop()", Toast.LENGTH_SHORT).show();
/*
* if(mArrayList.size()!=0){
for(int i = 0; i< mArrayList.size(); i++){
calendersaveeditor.putBoolean("save_box"+i, mArrayList.get(i).selected);
calendersaveeditor.putString("save_date"+i, mArrayList.get(i).number_exam);
calendersaveeditor.putString("save_work"+i, mArrayList.get(i).content_exam);
calendersaveeditor.putString("save_place"+i, mArrayList.get(i).content_exam2);
calendersaveeditor.putInt("save_size", mArrayList.size());
calendersaveeditor.commit();
}
}
else if(mArrayList.size()==0){
calendersaveeditor.clear();
calendersaveeditor.commit();
}
* /
Log.d("스케쥴선택액티비티", "OnStop()실행");
}
@Override
protected void onRestart() {
// TODO Auto-generated method stub
super.onRestart();
// Toast.makeText(getApplicationContext(), "onRestart()", Toast.LENGTH_SHORT).show();
Log.d("스케쥴선택액티비티", "OnRestart()실행");
}
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
// Toast.makeText(getApplicationContext(), "onDestroy()", Toast.LENGTH_SHORT).show();
Log.d("스케쥴선택액티비티", "OnDestroy()실행");
}
}
答案 0 :(得分：0)
首先，您需要在现有mArrayList中添加新条目，正如我从您的代码中看到的那样，您是在重新添加所有现有条目，而不是新条目。
在那之后，您只需要再次使用新的mArrayList设置适配器，便可以在回收器视图中看到新数据。