java.lang.IllegalArgumentException: 索引 2 处的绑定值为空？
java.lang.IllegalArgumentException: the bind value at index 2 is null?
我收到此错误，应用程序在到达 recyclerView 末尾后崩溃 list.I 不知道为什么会这样。我是 recyclerView 和数据库的新手。我不知道它是什么。
Logcat
java.lang.IllegalArgumentException: the bind value at index 2 is null
at android.database.sqlite.SQLiteProgram.bindString(SQLiteProgram.java:167)
at android.database.sqlite.SQLiteProgram.bindAllArgsAsStrings(SQLiteProgram.java:203)
at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:49)
at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1443)
at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1290)
at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1161)
at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1367)
------->at com.disha.daily_fresh.DataBase.DatabaseHelper.getCard(DatabaseHelper.java:80)
------->at com.disha.daily_fresh.Adepter.ItemAdp.setJoinPlayrList(ItemAdp.java:189)
------->at com.disha.daily_fresh.Adepter.ItemAdp.onBindViewHolder(ItemAdp.java:110)
------->at com.disha.daily_fresh.Adepter.ItemAdp.onBindViewHolder(ItemAdp.java:45)
at androidx.recyclerview.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:7065)
at androidx.recyclerview.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:7107)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:6012)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:6279)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6118)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6114)
at androidx.recyclerview.widget.LayoutState.next(LayoutState.java:98)
at androidx.recyclerview.widget.StaggeredGridLayoutManager.fill(StaggeredGridLayoutManager.java:1607)
at androidx.recyclerview.widget.StaggeredGridLayoutManager.scrollBy(StaggeredGridLayoutManager.java:2180)
at androidx.recyclerview.widget.StaggeredGridLayoutManager.scrollVerticallyBy(StaggeredGridLayoutManager.java:2039)
at androidx.recyclerview.widget.RecyclerView.scrollStep(RecyclerView.java:1841)
at androidx.recyclerview.widget.RecyclerView.scrollByInternal(RecyclerView.java:1940)
at androidx.recyclerview.widget.RecyclerView.onGenericMotionEvent(RecyclerView.java:3501)
at android.view.View.dispatchGenericMotionEventInternal(View.java:14092)
at android.view.View.dispatchGenericMotionEvent(View.java:14073)
at android.view.ViewGroup.dispatchTransformedGenericPointerEvent(ViewGroup.java:2551)
at android.view.ViewGroup.dispatchGenericPointerEvent(ViewGroup.java:2508)
at android.view.View.dispatchGenericMotionEvent(View.java:14066)
at android.view.ViewGroup.dispatchTransformedGenericPointerEvent(ViewGroup.java:2551)
at android.view.ViewGroup.dispatchGenericPointerEvent(ViewGroup.java:2508)
at android.view.View.dispatchGenericMotionEvent(View.java:14066)
at android.view.ViewGroup.dispatchTransformedGenericPointerEvent(ViewGroup.java:2551)
at android.view.ViewGroup.dispatchGenericPointerEvent(ViewGroup.java:2508)
at android.view.View.dispatchGenericMotionEvent(View.java:14066)
at android.view.ViewGroup.dispatchTransformedGenericPointerEvent(ViewGroup.java:2551)
at android.view.ViewGroup.dispatchGenericPointerEvent(ViewGroup.java:2508)
at android.view.View.dispatchGenericMotionEvent(View.java:14066)
at android.view.ViewGroup.dispatchTransformedGenericPointerEvent(ViewGroup.java:2551)
at android.view.ViewGroup.dispatchGenericPointerEvent(ViewGroup.java:2508)
at android.view.View.dispatchGenericMotionEvent(View.java:14066)
at android.view.ViewGroup.dispatchTransformedGenericPointerEvent(ViewGroup.java:2551)
at android.view.ViewGroup.dispatchGenericPointerEvent(ViewGroup.java:2508)
at android.view.View.dispatchGenericMotionEvent(View.java:14066)
at android.view.ViewGroup.dispatchTransformedGenericPointerEvent(ViewGroup.java:2551)
at android.view.ViewGroup.dispatchGenericPointerEvent(ViewGroup.java:2508)
2020-08-07 21:09:07.653 7068-7068/com.disha.daily_fresh E/AndroidRuntime: at android.view.View.dispatchGenericMotionEvent(View.java:14066)
at androidx.drawerlayout.widget.DrawerLayout.dispatchGenericMotionEvent(DrawerLayout.java:1539)
at android.view.ViewGroup.dispatchTransformedGenericPointerEvent(ViewGroup.java:2551)
at android.view.ViewGroup.dispatchGenericPointerEvent(ViewGroup.java:2508)
at android.view.View.dispatchGenericMotionEvent(View.java:14066)
at android.view.ViewGroup.dispatchTransformedGenericPointerEvent(ViewGroup.java:2551)
at android.view.ViewGroup.dispatchGenericPointerEvent(ViewGroup.java:2508)
at android.view.View.dispatchGenericMotionEvent(View.java:14066)
at android.view.ViewGroup.dispatchTransformedGenericPointerEvent(ViewGroup.java:2551)
at android.view.ViewGroup.dispatchGenericPointerEvent(ViewGroup.java:2508)
at android.view.View.dispatchGenericMotionEvent(View.java:14066)
at android.view.ViewGroup.dispatchTransformedGenericPointerEvent(ViewGroup.java:2551)
at android.view.ViewGroup.dispatchGenericPointerEvent(ViewGroup.java:2508)
at android.view.View.dispatchGenericMotionEvent(View.java:14066)
at android.view.ViewGroup.dispatchTransformedGenericPointerEvent(ViewGroup.java:2551)
at android.view.ViewGroup.dispatchGenericPointerEvent(ViewGroup.java:2508)
at android.view.View.dispatchGenericMotionEvent(View.java:14066)
at com.android.internal.policy.DecorView.superDispatchGenericMotionEvent(DecorView.java:473)
at com.android.internal.policy.PhoneWindow.superDispatchGenericMotionEvent(PhoneWindow.java:1859)
at android.app.Activity.dispatchGenericMotionEvent(Activity.java:4048)
at androidx.appcompat.view.WindowCallbackWrapper.dispatchGenericMotionEvent(WindowCallbackWrapper.java:79)
at androidx.appcompat.view.WindowCallbackWrapper.dispatchGenericMotionEvent(WindowCallbackWrapper.java:79)
at com.android.internal.policy.DecorView.dispatchGenericMotionEvent(DecorView.java:437)
at android.view.View.dispatchPointerEvent(View.java:14214)
at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:5652)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:5455)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4958)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5011)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4977)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:5117)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4985)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:5174)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4958)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5011)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4977)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4985)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4958)
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:7675)
at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:7644)
at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:7605)
at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:7800)
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:188)
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:336)
at android.os.Looper.loop(Looper.java:174)
at android.app.ActivityThread.main(ActivityThread.java:7356)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
2020-08-07 21:09:07.719 7068-7122/com.disha.daily_fresh W/CrashlyticsCore: Cannot send reports. Settings are unavailable.
2020-08-07 21:09:07.766 7068-7068/com.disha.daily_fresh I/Process: Sending signal. PID: 7068 SIG: 9
com.disha.daily_fresh.DataBase
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLi`teDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
import static com.disha.daily_fresh.Activity.HomeActivity.txt_countcard;
public class DatabaseHelper extends SQLiteOpenHelper {
public static final String DATABASE_NAME = "mydatabase.db";
public static final String TABLE_NAME = "items";
public static final String ICOL_1 = "ID";
public static final String ICOL_2 = "PID";
public static final String ICOL_3 = "image";
public static final String ICOL_4 = "title";
public static final String ICOL_5 = "weight";
public static final String ICOL_6 = "cost";
public static final String ICOL_7 = "qty";
public static final String ICOL_8 = "discount";
public DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, 1);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("create table " + TABLE_NAME + " (ID INTEGER PRIMARY KEY AUTOINCREMENT, PID TEXT , image TEXT ,title TEXT , weight TEXT , cost TEXT, qty TEXT , discount int )");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
onCreate(db);
}
public boolean insertData(MyCart rModel) {
if (getID(rModel.getPID(), rModel.getCost()) == -1) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(ICOL_2, rModel.getPID());
contentValues.put(ICOL_3, rModel.getImage());
contentValues.put(ICOL_4, rModel.getTitle());
contentValues.put(ICOL_5, rModel.getWeight());
contentValues.put(ICOL_6, rModel.getCost());
contentValues.put(ICOL_7, rModel.getQty());
contentValues.put(ICOL_8, rModel.getDiscount());
long result = db.insert(TABLE_NAME, null, contentValues);
if (result == -1) {
return false;
} else {
Cursor resw = getAllData();
txt_countcard.setText("" + resw.getCount());
return true;
}
} else {
return updateData(rModel.getPID(), rModel.getCost(), rModel.getQty());
}
}
private int getID(String pid, String cost) {
SQLiteDatabase db = this.getWritableDatabase();
Cursor c = db.query(TABLE_NAME, new String[]{"PID"}, "PID =? AND cost =? ", new String[]{pid, cost}, pid, null, null, null);
if (c.moveToFirst()) //if the row exist then return the id
return c.getInt(c.getColumnIndex("PID"));
return -1;
}
public int getCard(String pid, String cost) {
SQLiteDatabase db = this.getWritableDatabase();
Cursor c = db.query(TABLE_NAME, new String[]{"qty"}, "PID =? AND cost =? ", new String[]{pid, cost}, null, null, null, null);
if (c.moveToFirst()) { //if the row exist then return the id
return c.getInt(c.getColumnIndex("qty"));
} else {
return -1;
}
}
public Cursor getAllData() {
SQLiteDatabase db = this.getWritableDatabase();
Cursor res = db.rawQuery("select * from " + TABLE_NAME, null);
return res;
}
public boolean updateData(String id, String cost, String status) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(ICOL_7, status);
db.update(TABLE_NAME, contentValues, "PID = ? AND cost =?", new String[]{id, cost});
Cursor res = getAllData();
txt_countcard.setText("" + res.getCount());
return true;
}
Anshu IT, [07.08.20 21:41]
public void DeleteCard(){
SQLiteDatabase db = this.getWritableDatabase();
db.execSQL("delete from "+ TABLE_NAME);
txt_countcard.setText("0");
}
public Integer deleteRData(String id, String cost) {
SQLiteDatabase db = this.getWritableDatabase();
Integer a = db.delete(TABLE_NAME, "PID = ? AND cost =?", new String[]{id, cost});
Cursor res = getAllData();
txt_countcard.setText("" + res.getCount());
return a;
}
}
适配器java
package com.disha.daily_fresh.DataBase;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
import static com.disha.daily_fresh.Activity.HomeActivity.txt_countcard;
public class DatabaseHelper extends SQLiteOpenHelper {
public static final String DATABASE_NAME = "mydatabase.db";
public static final String TABLE_NAME = "items";
public static final String ICOL_1 = "ID";
public static final String ICOL_2 = "PID";
public static final String ICOL_3 = "image";
public static final String ICOL_4 = "title";
public static final String ICOL_5 = "weight";
public static final String ICOL_6 = "cost";
public static final String ICOL_7 = "qty";
public static final String ICOL_8 = "discount";
public DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, 1);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("create table " + TABLE_NAME + " (ID INTEGER PRIMARY KEY AUTOINCREMENT, PID TEXT , image TEXT ,title TEXT , weight TEXT , cost TEXT, qty TEXT , discount int )");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
onCreate(db);
}
public boolean insertData(MyCart rModel) {
if (getID(rModel.getPID(), rModel.getCost()) == -1) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(ICOL_2, rModel.getPID());
contentValues.put(ICOL_3, rModel.getImage());
contentValues.put(ICOL_4, rModel.getTitle());
contentValues.put(ICOL_5, rModel.getWeight());
contentValues.put(ICOL_6, rModel.getCost());
contentValues.put(ICOL_7, rModel.getQty());
contentValues.put(ICOL_8, rModel.getDiscount());
long result = db.insert(TABLE_NAME, null, contentValues);
if (result == -1) {
return false;
} else {
Cursor resw = getAllData();
txt_countcard.setText("" + resw.getCount());
return true;
}
} else {
return updateData(rModel.getPID(), rModel.getCost(), rModel.getQty());
}
}
private int getID(String pid, String cost) {
SQLiteDatabase db = this.getWritableDatabase();
Cursor c = db.query(TABLE_NAME, new String[]{"PID"}, "PID =? AND cost =? ", new String[]{pid, cost}, pid, null, null, null);
if (c.moveToFirst()) //if the row exist then return the id
return c.getInt(c.getColumnIndex("PID"));
return -1;
}
public int getCard(String pid, String cost) {
SQLiteDatabase db = this.getWritableDatabase();
Cursor c = db.query(TABLE_NAME, new String[]{"qty"}, "PID =? AND cost =? ", new String[]{pid, cost}, null, null, null, null);
if (c.moveToFirst()) { //if the row exist then return the id
return c.getInt(c.getColumnIndex("qty"));
} else {
return -1;
}
}
public Cursor getAllData() {
SQLiteDatabase db = this.getWritableDatabase();
Cursor res = db.rawQuery("select * from " + TABLE_NAME, null);
return res;
}
public boolean updateData(String id, String cost, String status) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(ICOL_7, status);
db.update(TABLE_NAME, contentValues, "PID = ? AND cost =?", new String[]{id, cost});
Cursor res = getAllData();
txt_countcard.setText("" + res.getCount());
return true;
}
import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Point;
import android.text.Html;
import android.text.SpannableStringBuilder;
import android.text.Spanned;
import android.text.TextPaint;
import android.text.method.LinkMovementMethod;
import android.text.style.ClickableSpan;
import android.util.Log;
import android.view.Display;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;
import android.view.WindowManager;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import androidx.recyclerview.widget.RecyclerView;
import com.bumptech.glide.Glide;
import com.disha.daily_fresh.Activity.ItemDetailsActivity;
import com.disha.daily_fresh.DataBase.DatabaseHelper;
import com.disha.daily_fresh.DataBase.MyCart;
import com.disha.daily_fresh.Model.Price;
import com.disha.daily_fresh.Model.ProductItem;
import com.disha.daily_fresh.R;
import com.disha.daily_fresh.Utils.SessionManager;
import com.disha.daily_fresh.retrofit.APIClient;
import java.util.List;
import butterknife.BindView;
import butterknife.ButterKnife;
import static com.disha.daily_fresh.Fragment.ItemListFragment.itemListFragment;
import static com.disha.daily_fresh.Utils.SessionManager.CURRUNCY;
public class ItemAdp extends RecyclerView.Adapter<ItemAdp.ViewHolder> {
private List<ProductItem> mData;
private LayoutInflater mInflater;
private ItemClickListener mClickListener;
Context mContext;
private int screenWidth;
SessionManager sessionManager;
public ItemAdp(Context context, List<ProductItem> data) {
this.mInflater = LayoutInflater.from(context);
this.mData = data;
this.mContext = context;
WindowManager wm = (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);
Display display = wm.getDefaultDisplay();
Point size = new Point();
display.getSize(size);
screenWidth = size.x;
sessionManager=new SessionManager(mContext);
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = mInflater.inflate(R.layout.item_custome, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
ProductItem datum = mData.get(position);
Glide.with(mContext).load(APIClient.Base_URL + "/" + datum.getProductImage()).thumbnail(Glide.with(mContext).load(R.drawable.ezgifresize)).into(holder.imgIcon);
holder.txtTitle.setText("" + datum.getProductName());
if (!datum.getSellerName().equals("")) {
holder.sellerName.setText("" + datum.getSellerName());
} else {
holder.sellerName.setVisibility(View.GONE);
}
if (!datum.getShortDesc().equals("")) {
holder.shortDesc.setText("" + datum.getShortDesc());
if (holder.shortDesc.getText().toString().length() < 90) {
} else {
makeTextViewResizable(holder.shortDesc, 3, "See More", true);
}
} else {
holder.shortDesc.setVisibility(View.GONE);
}
holder.imgIcon.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mContext.startActivity(new Intent(mContext, ItemDetailsActivity.class).putExtra("MyClass", datum).putParcelableArrayListExtra("MyList", datum.getPrice()));
}
});
if (datum.getmDiscount() > 0) {
holder.lvlOffer.setVisibility(View.VISIBLE);
holder.txtOffer.setText(datum.getmDiscount() + "% Off");
} else {
holder.lvlOffer.setVisibility(View.GONE);
}
setJoinPlayrList(holder.lvlSubitem, datum);
}
Anshu IT, [07.08.20 21:42]
@Override
public int getItemCount() {
return mData.size();
}
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
@BindView(R.id.txtTitle)
TextView txtTitle;
@BindView(R.id.txt_offer)
TextView txtOffer;
@BindView(R.id.seller_name)
TextView sellerName;
@BindView(R.id.short_desc)
TextView shortDesc;
@BindView(R.id.lvl_subitem)
LinearLayout lvlSubitem;
@BindView(R.id.lvl_offer)
LinearLayout lvlOffer;
@BindView(R.id.img_icon)
ImageView imgIcon;
ViewHolder(View itemView) {
super(itemView);
ButterKnife.bind(this, itemView);
itemView.setOnClickListener(this);
}
@Override
public void onClick(View view) {
if (mClickListener != null) mClickListener.onItemClick(view, getAdapterPosition());
}
}
// String getItem(int id) {
// return mData.get(id);
// }
void setClickListener(ItemClickListener itemClickListener) {
this.mClickListener = itemClickListener;
}
public interface ItemClickListener {
void onItemClick(View view, int position);
}
private void setJoinPlayrList(LinearLayout lnrView, ProductItem datum) {
List<Price> priceList = datum.getPrice();
lnrView.removeAllViews();
final int[] count = {0};
DatabaseHelper helper = new DatabaseHelper(lnrView.getContext());
if (priceList != null && priceList.size() > 0) {
for (int i = 0; i < priceList.size(); i++) {
LayoutInflater inflater = LayoutInflater.from(mContext);
View view = inflater.inflate(R.layout.custome_prize, null);
TextView txt_price = view.findViewById(R.id.txt_price);
TextView txt_gram = view.findViewById(R.id.txt_gram);
TextView txt_offer = view.findViewById(R.id.txt_offer);
TextView txtcount = view.findViewById(R.id.txtcount);
LinearLayout img_mins = view.findViewById(R.id.img_mins);
LinearLayout img_plus = view.findViewById(R.id.img_plus);
MyCart myCart = new MyCart();
myCart.setPID(datum.getId());
myCart.setImage(datum.getProductImage());
myCart.setTitle(datum.getProductName());
myCart.setWeight(datum.getPrice().get(i).getProductType());
myCart.setCost(datum.getPrice().get(i).getProductPrice());
myCart.setDiscount(datum.getmDiscount());
int qrt = helper.getCard(myCart.getPID(), myCart.getCost());
if (qrt != -1) {
count[0] = qrt;
txtcount.setText("" + count[0]);
txtcount.setVisibility(View.VISIBLE);
} else {
txtcount.setVisibility(View.VISIBLE);
img_mins.setVisibility(View.VISIBLE);
}
img_mins.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
count[0] = Integer.parseInt(txtcount.getText().toString());
Anshu IT, [07.08.20 21:42]
count[0] = count[0] - 1;
if (count[0] <= 0) {
img_mins.setVisibility(View.VISIBLE);
txtcount.setText("0");
txtcount.setVisibility(View.VISIBLE);
helper.deleteRData(myCart.getPID(), myCart.getCost());
} else {
txtcount.setVisibility(View.VISIBLE);
txtcount.setText("" + count[0]);
myCart.setQty(String.valueOf(count[0]));
Log.e("INsert", "--> " + helper.insertData(myCart));
}
itemListFragment.updateItem();
}
});
img_plus.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
txtcount.setVisibility(View.VISIBLE);
img_mins.setVisibility(View.VISIBLE);
count[0] = Integer.parseInt(txtcount.getText().toString());
count[0] = count[0] + 1;
txtcount.setText("" + count[0]);
myCart.setQty(String.valueOf(count[0]));
Log.e("INsert", "--> " + helper.insertData(myCart));
itemListFragment.updateItem();
}
});
txt_gram.setText("" + priceList.get(i).getProductType());
if (datum.getmDiscount() > 0) {
double res = (Double.parseDouble(priceList.get(i).getProductPrice()) / 100.0f)* datum.getmDiscount();
res = Integer.parseInt(priceList.get(i).getProductPrice()) - res;
txt_offer.setText(sessionManager.getStringData(CURRUNCY) + priceList.get(i).getProductPrice());
txt_offer.setPaintFlags(txt_offer.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
txt_price.setText(sessionManager.getStringData(CURRUNCY) + res);
} else {
txt_offer.setVisibility(View.GONE);
txt_price.setText(sessionManager.getStringData(CURRUNCY) + priceList.get(i).getProductPrice());
}
lnrView.addView(view);
}
}
错误是您在 groupby 中传递值 (pid)，这需要列名
Cursor c = db.query(TABLE_NAME, new String[]{"PID"}, "PID =? AND cost =? ", new String[]{pid, cost}, pid, null, null, null);
如果您需要 groupby 提供列名（PID）而不是像这样的值，并且您的查询无效，因为您将 pid 作为值传递并获取 pid new String[]{"PID"}，如果您需要要让所有列替换为 null，或者如果您希望获得选定的列，请添加更多列：
Cursor c = db.query(TABLE_NAME,null, "PID =? AND cost =? ", new String[]{pid, cost}, null, null, null, null);
我收到此错误，应用程序在到达 recyclerView 末尾后崩溃 list.I 不知道为什么会这样。我是 recyclerView 和数据库的新手。我不知道它是什么。
Logcat
java.lang.IllegalArgumentException: the bind value at index 2 is null
at android.database.sqlite.SQLiteProgram.bindString(SQLiteProgram.java:167)
at android.database.sqlite.SQLiteProgram.bindAllArgsAsStrings(SQLiteProgram.java:203)
at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:49)
at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1443)
at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1290)
at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1161)
at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1367)
------->at com.disha.daily_fresh.DataBase.DatabaseHelper.getCard(DatabaseHelper.java:80)
------->at com.disha.daily_fresh.Adepter.ItemAdp.setJoinPlayrList(ItemAdp.java:189)
------->at com.disha.daily_fresh.Adepter.ItemAdp.onBindViewHolder(ItemAdp.java:110)
------->at com.disha.daily_fresh.Adepter.ItemAdp.onBindViewHolder(ItemAdp.java:45)
at androidx.recyclerview.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:7065)
at androidx.recyclerview.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:7107)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:6012)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:6279)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6118)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6114)
at androidx.recyclerview.widget.LayoutState.next(LayoutState.java:98)
at androidx.recyclerview.widget.StaggeredGridLayoutManager.fill(StaggeredGridLayoutManager.java:1607)
at androidx.recyclerview.widget.StaggeredGridLayoutManager.scrollBy(StaggeredGridLayoutManager.java:2180)
at androidx.recyclerview.widget.StaggeredGridLayoutManager.scrollVerticallyBy(StaggeredGridLayoutManager.java:2039)
at androidx.recyclerview.widget.RecyclerView.scrollStep(RecyclerView.java:1841)
at androidx.recyclerview.widget.RecyclerView.scrollByInternal(RecyclerView.java:1940)
at androidx.recyclerview.widget.RecyclerView.onGenericMotionEvent(RecyclerView.java:3501)
at android.view.View.dispatchGenericMotionEventInternal(View.java:14092)
at android.view.View.dispatchGenericMotionEvent(View.java:14073)
at android.view.ViewGroup.dispatchTransformedGenericPointerEvent(ViewGroup.java:2551)
at android.view.ViewGroup.dispatchGenericPointerEvent(ViewGroup.java:2508)
at android.view.View.dispatchGenericMotionEvent(View.java:14066)
at android.view.ViewGroup.dispatchTransformedGenericPointerEvent(ViewGroup.java:2551)
at android.view.ViewGroup.dispatchGenericPointerEvent(ViewGroup.java:2508)
at android.view.View.dispatchGenericMotionEvent(View.java:14066)
at android.view.ViewGroup.dispatchTransformedGenericPointerEvent(ViewGroup.java:2551)
at android.view.ViewGroup.dispatchGenericPointerEvent(ViewGroup.java:2508)
at android.view.View.dispatchGenericMotionEvent(View.java:14066)
at android.view.ViewGroup.dispatchTransformedGenericPointerEvent(ViewGroup.java:2551)
at android.view.ViewGroup.dispatchGenericPointerEvent(ViewGroup.java:2508)
at android.view.View.dispatchGenericMotionEvent(View.java:14066)
at android.view.ViewGroup.dispatchTransformedGenericPointerEvent(ViewGroup.java:2551)
at android.view.ViewGroup.dispatchGenericPointerEvent(ViewGroup.java:2508)
at android.view.View.dispatchGenericMotionEvent(View.java:14066)
at android.view.ViewGroup.dispatchTransformedGenericPointerEvent(ViewGroup.java:2551)
at android.view.ViewGroup.dispatchGenericPointerEvent(ViewGroup.java:2508)
at android.view.View.dispatchGenericMotionEvent(View.java:14066)
at android.view.ViewGroup.dispatchTransformedGenericPointerEvent(ViewGroup.java:2551)
at android.view.ViewGroup.dispatchGenericPointerEvent(ViewGroup.java:2508)
2020-08-07 21:09:07.653 7068-7068/com.disha.daily_fresh E/AndroidRuntime: at android.view.View.dispatchGenericMotionEvent(View.java:14066)
at androidx.drawerlayout.widget.DrawerLayout.dispatchGenericMotionEvent(DrawerLayout.java:1539)
at android.view.ViewGroup.dispatchTransformedGenericPointerEvent(ViewGroup.java:2551)
at android.view.ViewGroup.dispatchGenericPointerEvent(ViewGroup.java:2508)
at android.view.View.dispatchGenericMotionEvent(View.java:14066)
at android.view.ViewGroup.dispatchTransformedGenericPointerEvent(ViewGroup.java:2551)
at android.view.ViewGroup.dispatchGenericPointerEvent(ViewGroup.java:2508)
at android.view.View.dispatchGenericMotionEvent(View.java:14066)
at android.view.ViewGroup.dispatchTransformedGenericPointerEvent(ViewGroup.java:2551)
at android.view.ViewGroup.dispatchGenericPointerEvent(ViewGroup.java:2508)
at android.view.View.dispatchGenericMotionEvent(View.java:14066)
at android.view.ViewGroup.dispatchTransformedGenericPointerEvent(ViewGroup.java:2551)
at android.view.ViewGroup.dispatchGenericPointerEvent(ViewGroup.java:2508)
at android.view.View.dispatchGenericMotionEvent(View.java:14066)
at android.view.ViewGroup.dispatchTransformedGenericPointerEvent(ViewGroup.java:2551)
at android.view.ViewGroup.dispatchGenericPointerEvent(ViewGroup.java:2508)
at android.view.View.dispatchGenericMotionEvent(View.java:14066)
at com.android.internal.policy.DecorView.superDispatchGenericMotionEvent(DecorView.java:473)
at com.android.internal.policy.PhoneWindow.superDispatchGenericMotionEvent(PhoneWindow.java:1859)
at android.app.Activity.dispatchGenericMotionEvent(Activity.java:4048)
at androidx.appcompat.view.WindowCallbackWrapper.dispatchGenericMotionEvent(WindowCallbackWrapper.java:79)
at androidx.appcompat.view.WindowCallbackWrapper.dispatchGenericMotionEvent(WindowCallbackWrapper.java:79)
at com.android.internal.policy.DecorView.dispatchGenericMotionEvent(DecorView.java:437)
at android.view.View.dispatchPointerEvent(View.java:14214)
at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:5652)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:5455)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4958)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5011)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4977)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:5117)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4985)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:5174)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4958)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5011)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4977)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4985)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4958)
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:7675)
at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:7644)
at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:7605)
at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:7800)
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:188)
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:336)
at android.os.Looper.loop(Looper.java:174)
at android.app.ActivityThread.main(ActivityThread.java:7356)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
2020-08-07 21:09:07.719 7068-7122/com.disha.daily_fresh W/CrashlyticsCore: Cannot send reports. Settings are unavailable.
2020-08-07 21:09:07.766 7068-7068/com.disha.daily_fresh I/Process: Sending signal. PID: 7068 SIG: 9
com.disha.daily_fresh.DataBase
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLi`teDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
import static com.disha.daily_fresh.Activity.HomeActivity.txt_countcard;
public class DatabaseHelper extends SQLiteOpenHelper {
public static final String DATABASE_NAME = "mydatabase.db";
public static final String TABLE_NAME = "items";
public static final String ICOL_1 = "ID";
public static final String ICOL_2 = "PID";
public static final String ICOL_3 = "image";
public static final String ICOL_4 = "title";
public static final String ICOL_5 = "weight";
public static final String ICOL_6 = "cost";
public static final String ICOL_7 = "qty";
public static final String ICOL_8 = "discount";
public DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, 1);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("create table " + TABLE_NAME + " (ID INTEGER PRIMARY KEY AUTOINCREMENT, PID TEXT , image TEXT ,title TEXT , weight TEXT , cost TEXT, qty TEXT , discount int )");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
onCreate(db);
}
public boolean insertData(MyCart rModel) {
if (getID(rModel.getPID(), rModel.getCost()) == -1) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(ICOL_2, rModel.getPID());
contentValues.put(ICOL_3, rModel.getImage());
contentValues.put(ICOL_4, rModel.getTitle());
contentValues.put(ICOL_5, rModel.getWeight());
contentValues.put(ICOL_6, rModel.getCost());
contentValues.put(ICOL_7, rModel.getQty());
contentValues.put(ICOL_8, rModel.getDiscount());
long result = db.insert(TABLE_NAME, null, contentValues);
if (result == -1) {
return false;
} else {
Cursor resw = getAllData();
txt_countcard.setText("" + resw.getCount());
return true;
}
} else {
return updateData(rModel.getPID(), rModel.getCost(), rModel.getQty());
}
}
private int getID(String pid, String cost) {
SQLiteDatabase db = this.getWritableDatabase();
Cursor c = db.query(TABLE_NAME, new String[]{"PID"}, "PID =? AND cost =? ", new String[]{pid, cost}, pid, null, null, null);
if (c.moveToFirst()) //if the row exist then return the id
return c.getInt(c.getColumnIndex("PID"));
return -1;
}
public int getCard(String pid, String cost) {
SQLiteDatabase db = this.getWritableDatabase();
Cursor c = db.query(TABLE_NAME, new String[]{"qty"}, "PID =? AND cost =? ", new String[]{pid, cost}, null, null, null, null);
if (c.moveToFirst()) { //if the row exist then return the id
return c.getInt(c.getColumnIndex("qty"));
} else {
return -1;
}
}
public Cursor getAllData() {
SQLiteDatabase db = this.getWritableDatabase();
Cursor res = db.rawQuery("select * from " + TABLE_NAME, null);
return res;
}
public boolean updateData(String id, String cost, String status) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(ICOL_7, status);
db.update(TABLE_NAME, contentValues, "PID = ? AND cost =?", new String[]{id, cost});
Cursor res = getAllData();
txt_countcard.setText("" + res.getCount());
return true;
}
Anshu IT, [07.08.20 21:41]
public void DeleteCard(){
SQLiteDatabase db = this.getWritableDatabase();
db.execSQL("delete from "+ TABLE_NAME);
txt_countcard.setText("0");
}
public Integer deleteRData(String id, String cost) {
SQLiteDatabase db = this.getWritableDatabase();
Integer a = db.delete(TABLE_NAME, "PID = ? AND cost =?", new String[]{id, cost});
Cursor res = getAllData();
txt_countcard.setText("" + res.getCount());
return a;
}
}
适配器java
package com.disha.daily_fresh.DataBase;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
import static com.disha.daily_fresh.Activity.HomeActivity.txt_countcard;
public class DatabaseHelper extends SQLiteOpenHelper {
public static final String DATABASE_NAME = "mydatabase.db";
public static final String TABLE_NAME = "items";
public static final String ICOL_1 = "ID";
public static final String ICOL_2 = "PID";
public static final String ICOL_3 = "image";
public static final String ICOL_4 = "title";
public static final String ICOL_5 = "weight";
public static final String ICOL_6 = "cost";
public static final String ICOL_7 = "qty";
public static final String ICOL_8 = "discount";
public DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, 1);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("create table " + TABLE_NAME + " (ID INTEGER PRIMARY KEY AUTOINCREMENT, PID TEXT , image TEXT ,title TEXT , weight TEXT , cost TEXT, qty TEXT , discount int )");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
onCreate(db);
}
public boolean insertData(MyCart rModel) {
if (getID(rModel.getPID(), rModel.getCost()) == -1) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(ICOL_2, rModel.getPID());
contentValues.put(ICOL_3, rModel.getImage());
contentValues.put(ICOL_4, rModel.getTitle());
contentValues.put(ICOL_5, rModel.getWeight());
contentValues.put(ICOL_6, rModel.getCost());
contentValues.put(ICOL_7, rModel.getQty());
contentValues.put(ICOL_8, rModel.getDiscount());
long result = db.insert(TABLE_NAME, null, contentValues);
if (result == -1) {
return false;
} else {
Cursor resw = getAllData();
txt_countcard.setText("" + resw.getCount());
return true;
}
} else {
return updateData(rModel.getPID(), rModel.getCost(), rModel.getQty());
}
}
private int getID(String pid, String cost) {
SQLiteDatabase db = this.getWritableDatabase();
Cursor c = db.query(TABLE_NAME, new String[]{"PID"}, "PID =? AND cost =? ", new String[]{pid, cost}, pid, null, null, null);
if (c.moveToFirst()) //if the row exist then return the id
return c.getInt(c.getColumnIndex("PID"));
return -1;
}
public int getCard(String pid, String cost) {
SQLiteDatabase db = this.getWritableDatabase();
Cursor c = db.query(TABLE_NAME, new String[]{"qty"}, "PID =? AND cost =? ", new String[]{pid, cost}, null, null, null, null);
if (c.moveToFirst()) { //if the row exist then return the id
return c.getInt(c.getColumnIndex("qty"));
} else {
return -1;
}
}
public Cursor getAllData() {
SQLiteDatabase db = this.getWritableDatabase();
Cursor res = db.rawQuery("select * from " + TABLE_NAME, null);
return res;
}
public boolean updateData(String id, String cost, String status) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(ICOL_7, status);
db.update(TABLE_NAME, contentValues, "PID = ? AND cost =?", new String[]{id, cost});
Cursor res = getAllData();
txt_countcard.setText("" + res.getCount());
return true;
}
import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Point;
import android.text.Html;
import android.text.SpannableStringBuilder;
import android.text.Spanned;
import android.text.TextPaint;
import android.text.method.LinkMovementMethod;
import android.text.style.ClickableSpan;
import android.util.Log;
import android.view.Display;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;
import android.view.WindowManager;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import androidx.recyclerview.widget.RecyclerView;
import com.bumptech.glide.Glide;
import com.disha.daily_fresh.Activity.ItemDetailsActivity;
import com.disha.daily_fresh.DataBase.DatabaseHelper;
import com.disha.daily_fresh.DataBase.MyCart;
import com.disha.daily_fresh.Model.Price;
import com.disha.daily_fresh.Model.ProductItem;
import com.disha.daily_fresh.R;
import com.disha.daily_fresh.Utils.SessionManager;
import com.disha.daily_fresh.retrofit.APIClient;
import java.util.List;
import butterknife.BindView;
import butterknife.ButterKnife;
import static com.disha.daily_fresh.Fragment.ItemListFragment.itemListFragment;
import static com.disha.daily_fresh.Utils.SessionManager.CURRUNCY;
public class ItemAdp extends RecyclerView.Adapter<ItemAdp.ViewHolder> {
private List<ProductItem> mData;
private LayoutInflater mInflater;
private ItemClickListener mClickListener;
Context mContext;
private int screenWidth;
SessionManager sessionManager;
public ItemAdp(Context context, List<ProductItem> data) {
this.mInflater = LayoutInflater.from(context);
this.mData = data;
this.mContext = context;
WindowManager wm = (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);
Display display = wm.getDefaultDisplay();
Point size = new Point();
display.getSize(size);
screenWidth = size.x;
sessionManager=new SessionManager(mContext);
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = mInflater.inflate(R.layout.item_custome, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
ProductItem datum = mData.get(position);
Glide.with(mContext).load(APIClient.Base_URL + "/" + datum.getProductImage()).thumbnail(Glide.with(mContext).load(R.drawable.ezgifresize)).into(holder.imgIcon);
holder.txtTitle.setText("" + datum.getProductName());
if (!datum.getSellerName().equals("")) {
holder.sellerName.setText("" + datum.getSellerName());
} else {
holder.sellerName.setVisibility(View.GONE);
}
if (!datum.getShortDesc().equals("")) {
holder.shortDesc.setText("" + datum.getShortDesc());
if (holder.shortDesc.getText().toString().length() < 90) {
} else {
makeTextViewResizable(holder.shortDesc, 3, "See More", true);
}
} else {
holder.shortDesc.setVisibility(View.GONE);
}
holder.imgIcon.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mContext.startActivity(new Intent(mContext, ItemDetailsActivity.class).putExtra("MyClass", datum).putParcelableArrayListExtra("MyList", datum.getPrice()));
}
});
if (datum.getmDiscount() > 0) {
holder.lvlOffer.setVisibility(View.VISIBLE);
holder.txtOffer.setText(datum.getmDiscount() + "% Off");
} else {
holder.lvlOffer.setVisibility(View.GONE);
}
setJoinPlayrList(holder.lvlSubitem, datum);
}
Anshu IT, [07.08.20 21:42]
@Override
public int getItemCount() {
return mData.size();
}
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
@BindView(R.id.txtTitle)
TextView txtTitle;
@BindView(R.id.txt_offer)
TextView txtOffer;
@BindView(R.id.seller_name)
TextView sellerName;
@BindView(R.id.short_desc)
TextView shortDesc;
@BindView(R.id.lvl_subitem)
LinearLayout lvlSubitem;
@BindView(R.id.lvl_offer)
LinearLayout lvlOffer;
@BindView(R.id.img_icon)
ImageView imgIcon;
ViewHolder(View itemView) {
super(itemView);
ButterKnife.bind(this, itemView);
itemView.setOnClickListener(this);
}
@Override
public void onClick(View view) {
if (mClickListener != null) mClickListener.onItemClick(view, getAdapterPosition());
}
}
// String getItem(int id) {
// return mData.get(id);
// }
void setClickListener(ItemClickListener itemClickListener) {
this.mClickListener = itemClickListener;
}
public interface ItemClickListener {
void onItemClick(View view, int position);
}
private void setJoinPlayrList(LinearLayout lnrView, ProductItem datum) {
List<Price> priceList = datum.getPrice();
lnrView.removeAllViews();
final int[] count = {0};
DatabaseHelper helper = new DatabaseHelper(lnrView.getContext());
if (priceList != null && priceList.size() > 0) {
for (int i = 0; i < priceList.size(); i++) {
LayoutInflater inflater = LayoutInflater.from(mContext);
View view = inflater.inflate(R.layout.custome_prize, null);
TextView txt_price = view.findViewById(R.id.txt_price);
TextView txt_gram = view.findViewById(R.id.txt_gram);
TextView txt_offer = view.findViewById(R.id.txt_offer);
TextView txtcount = view.findViewById(R.id.txtcount);
LinearLayout img_mins = view.findViewById(R.id.img_mins);
LinearLayout img_plus = view.findViewById(R.id.img_plus);
MyCart myCart = new MyCart();
myCart.setPID(datum.getId());
myCart.setImage(datum.getProductImage());
myCart.setTitle(datum.getProductName());
myCart.setWeight(datum.getPrice().get(i).getProductType());
myCart.setCost(datum.getPrice().get(i).getProductPrice());
myCart.setDiscount(datum.getmDiscount());
int qrt = helper.getCard(myCart.getPID(), myCart.getCost());
if (qrt != -1) {
count[0] = qrt;
txtcount.setText("" + count[0]);
txtcount.setVisibility(View.VISIBLE);
} else {
txtcount.setVisibility(View.VISIBLE);
img_mins.setVisibility(View.VISIBLE);
}
img_mins.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
count[0] = Integer.parseInt(txtcount.getText().toString());
Anshu IT, [07.08.20 21:42]
count[0] = count[0] - 1;
if (count[0] <= 0) {
img_mins.setVisibility(View.VISIBLE);
txtcount.setText("0");
txtcount.setVisibility(View.VISIBLE);
helper.deleteRData(myCart.getPID(), myCart.getCost());
} else {
txtcount.setVisibility(View.VISIBLE);
txtcount.setText("" + count[0]);
myCart.setQty(String.valueOf(count[0]));
Log.e("INsert", "--> " + helper.insertData(myCart));
}
itemListFragment.updateItem();
}
});
img_plus.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
txtcount.setVisibility(View.VISIBLE);
img_mins.setVisibility(View.VISIBLE);
count[0] = Integer.parseInt(txtcount.getText().toString());
count[0] = count[0] + 1;
txtcount.setText("" + count[0]);
myCart.setQty(String.valueOf(count[0]));
Log.e("INsert", "--> " + helper.insertData(myCart));
itemListFragment.updateItem();
}
});
txt_gram.setText("" + priceList.get(i).getProductType());
if (datum.getmDiscount() > 0) {
double res = (Double.parseDouble(priceList.get(i).getProductPrice()) / 100.0f)* datum.getmDiscount();
res = Integer.parseInt(priceList.get(i).getProductPrice()) - res;
txt_offer.setText(sessionManager.getStringData(CURRUNCY) + priceList.get(i).getProductPrice());
txt_offer.setPaintFlags(txt_offer.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
txt_price.setText(sessionManager.getStringData(CURRUNCY) + res);
} else {
txt_offer.setVisibility(View.GONE);
txt_price.setText(sessionManager.getStringData(CURRUNCY) + priceList.get(i).getProductPrice());
}
lnrView.addView(view);
}
}
错误是您在 groupby 中传递值 (pid)，这需要列名
Cursor c = db.query(TABLE_NAME, new String[]{"PID"}, "PID =? AND cost =? ", new String[]{pid, cost}, pid, null, null, null);
如果您需要 groupby 提供列名（PID）而不是像这样的值，并且您的查询无效，因为您将 pid 作为值传递并获取 pid new String[]{"PID"}，如果您需要要让所有列替换为 null，或者如果您希望获得选定的列，请添加更多列：
Cursor c = db.query(TABLE_NAME,null, "PID =? AND cost =? ", new String[]{pid, cost}, null, null, null, null);