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は、これは私のアダプタクラスです：私のrecyclerviewにデータを入力できません。
public class ItemsAdapter extends RecyclerView.Adapter<ItemsAdapter.RecyclerViewHolder> {
ArrayList<Item> arrayList=new ArrayList<>();
public ItemsAdapter(ArrayList<Item> arrayList, Context context) {
this.arrayList = arrayList;
this.context = context;
}
Context context;
public void update(ArrayList<Item> items)
{
this.arrayList=items;
this.notifyDataSetChanged();
}
@Override
public RecyclerViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view=LayoutInflater.from(context).inflate(R.layout.displays_searchitems,parent,false);
RecyclerViewHolder recyclerViewHolder=new RecyclerViewHolder(view);
return recyclerViewHolder;
}
@Override
public void onBindViewHolder(RecyclerViewHolder holder, int position) {
Item item=arrayList.get(position);
holder.ets_ean1.setText(item.getItem_ean());
holder.ets_company.setText(item.getItem_company());
holder.ets_name.setText(item.getItem_name());
holder.ets_desc.setText(item.getItem_desc());
holder.ets_brand.setText(item.getItem_brand());
}
@Override
public int getItemCount() {
return arrayList.size();
}
public static class RecyclerViewHolder extends RecyclerView.ViewHolder{
EditText ets_company,ets_name,ets_desc,ets_brand,ets_ean1;
public RecyclerViewHolder(View view) {
super(view);
ets_company= (EditText) view.findViewById(R.id.ets_company);
ets_name=(EditText) view.findViewById(R.id.ets_name);
ets_desc=(EditText) view.findViewById(R.id.ets_desc);
ets_brand=(EditText) view.findViewById(R.id.ets_brand);
ets_ean1=(EditText) view.findViewById(R.id.ets_ean1);
}
}
私のPOJOクラス：
public class Item {
private int item_number;
private String item_ean;
private String item_desc;
private String item_name;
private String item_company;
private String item_brand;
public Item(int item_number, String item_ean, String item_desc, String item_name, String item_company, String item_brand) {
this.item_number = item_number;
this.item_ean = item_ean;
this.item_desc = item_desc;
this.item_name = item_name;
this.item_company = item_company;
this.item_brand = item_brand;
}
public Item() {
}
public int getItem_number() {
return item_number;
}
public void setItem_number(int item_number) {
this.item_number = item_number;
}
public String getItem_ean() {
return item_ean;
}
public void setItem_ean(String item_ean) {
this.item_ean = item_ean;
}
public String getItem_desc() {
return item_desc;
}
public void setItem_desc(String item_desc) {
this.item_desc = item_desc;
}
public String getItem_name() {
return item_name;
}
public void setItem_name(String item_name) {
this.item_name = item_name;
}
public String getItem_company() {
return item_company;
}
public void setItem_company(String item_company) {
this.item_company = item_company;
}
public String getItem_brand() {
return item_brand;
}
public void setItem_brand(String item_brand) {
this.item_brand = item_brand;
}
Activityクラス：私は、データベースからのデータを表示しようとしている
public class Search extends Activity {
TextView textView;
EditText editText,editText1;
ToggleButton toggleButton;
private DBController dbcontroller;
private SQLiteDatabase database;
RecyclerView recyclerView;
RecyclerView.LayoutManager layoutManager;
private static final int CAMERA_PHOTO = 111;
private ImageView ImgPhoto;
private Uri imagaeToUploadUri;
ArrayList<HashMap<String, String>> selected = new ArrayList<>();
ArrayList<HashMap<String, String>> pselected = new ArrayList<>();
private ArrayList<Item> arrayList=new ArrayList<>();
ItemsAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_search);
editText = (EditText) findViewById(R.id.et_sdata);
textView = (TextView) findViewById(R.id.textView);
dbcontroller = new DBController(this);
textView = (TextView) findViewById(R.id.txt_message);
toggleButton = (ToggleButton) findViewById(R.id.tggl_btn);
ImgPhoto = (ImageView) findViewById(R.id.imageView);
editText1 = (EditText) findViewById(R.id.ets_ean1);
recyclerView= (RecyclerView) findViewById(R.id.customList);
adapter=new ItemsAdapter(arrayList,this);
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getApplicationContext());
recyclerView.setLayoutManager(mLayoutManager);
recyclerView.setItemAnimator(new DefaultItemAnimator());
recyclerView.setLayoutManager(new LinearLayoutManager(this));
recyclerView.setAdapter(adapter);
}
@Override
protected void onResume() {
super.onResume();
editText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
String string = s.toString();
if (string.length() > 0 && string.charAt(string.length() - 1) == '\n') {
displayItems();
}
}
@Override
public void afterTextChanged(Editable s) {
}
});
}
public void displayItems() {
String s2 = editText.getText().toString();
ArrayList<HashMap<String, String>> allItems = dbcontroller.searchdata(s2);
//ArrayList<HashMap<String, String>> predicted = dbcontroller.getpdata(s4);
ArrayList<Item> itemList=new ArrayList<Item>();
s2 = s2.replace("\\n", "").replace("\n", "");
long ean_num=Long.parseLong(s2.trim());
Item item=new Item();
if (allItems.size() == 0) {
allItems = dbcontroller.getpdata(s2);
for (HashMap<String, String> map : allItems)
{
long ean_num_pred = Long.parseLong(map.get("EAN"));
selected=pselected;
selected.add(map);
item.setItem_ean(map.get("item_ean"));
item.setItem_company(map.get("item_company"));
item.setItem_name(map.get("item_name"));
item.setItem_brand(map.get("item_brand"));
item.setItem_desc(map.get("item_desc"));
itemList.add(item);
Log.d("Cpredictor","Items are"+item);
boolean isInserted = dbcontroller.insertReport(editText.getText().toString(), "2");
Log.d("coredictor", "the value is " + ean_num);
Log.d("coredictor", "the predicted value is " + ean_num_pred);
textView.setText("(S)"+s2+"(P)"+map.get("item_ean"));
textView.setTextColor(Color.GREEN);
editText.setText("");
if (isInserted = true)
{
Toast.makeText(Search.this, "Data inserted", Toast.LENGTH_LONG).show();
}else{
Toast.makeText(Search.this, "Data not inserted", Toast.LENGTH_LONG).show();
}
toggleButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (((ToggleButton) v).isChecked()) {
boolean isUpdated = dbcontroller.updatePrediction(editText.getText().toString(), "4");
Toast.makeText(getBaseContext(), "Toggle is on" + isUpdated, Toast.LENGTH_LONG).show();
editText.setText("");
} else {
boolean isUpdated = dbcontroller.updatePrediction(editText.getText().toString(), "3");
Toast.makeText(getBaseContext(), "Toggle is off", Toast.LENGTH_LONG).show();
editText.setText("");
}
}
});
}
} else {
for (HashMap<String, String> map : allItems)
{
if (map.get("EAN").equals(s2))
{
item=new Item();
item.setItem_ean(map.get("item_ean"));
item.setItem_company(map.get("item_company"));
item.setItem_name(map.get("item_name"));
item.setItem_brand(map.get("item_brand"));
item.setItem_desc(map.get("item_desc"));
itemList.add(item);
boolean isInserted = dbcontroller.insertReport(editText.getText().toString(), "1");
selected=pselected;
selected.add(map);
textView.setText("ITEM FOUND!!!!!");
textView.setTextColor(Color.BLUE);
editText.setText("");
if (isInserted = true)
Toast.makeText(Search.this, "Data inserted", Toast.LENGTH_LONG).show();
else
Toast.makeText(Search.this, "Data not inserted", Toast.LENGTH_LONG).show();
}
}
}
adapter.update(itemList);
//ListAdapter adapter = new SimpleAdapter(Search.this,selected,R.layout.displays_searchitems, new String[]{"EAN", "COMPANY", "NAME", "DESCRIPTION", "BRAND"}, new int[]{
// R.id.ets_ean1, R.id.ets_company, R.id.ets_name, R.id.ets_desc, R.id.ets_brand});
//tomList.setAdapter(adapter);
}
（sqliteの） 。 ロジックが正常に動作しています。私はログを入れて、それが完璧なデータを表示しているのを見ることができます。しかし、なぜデータが私のrecyclerviewに表示されないのか分かりません。 私は助けが必要です。