我有2个RecyclerView适配器，分别名为AddDrinkAdapter和DrinkDetailAdapter。AddDrinkAdapter用于列出不同类型的饮料和所需的数量。
而DrinkDetailAdapter是列出这些饮料的详细信息。
这是我的AddDrinkAdapter课
public class AddDrinkAdapter extends RecyclerView.Adapter<AddDrinkViewHolder> {
private ArrayList<DrinkQuantity> listDrinkQuantity = new ArrayList<>();
private AddDrinkFragment.callbackListener listener;
private final int min = 0;
private final int max = 5;
AddDrinkAdapter(ArrayList<DrinkQuantity> listDrinkQuantity, AddDrinkFragment.callbackListener callbackListener) {
this.listDrinkQuantity = listDrinkQuantity;
listener = callbackListener;
}
public ArrayList<DrinkQuantity> getListDrinkQuantity() {
return listDrinkQuantity;
}
@NonNull
@Override
public AddDrinkViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.item_drink_quantity, parent, false);
return new AddDrinkViewHolder(itemView);
}
@SuppressLint("SetTextI18n")
@Override
public void onBindViewHolder(@NonNull AddDrinkViewHolder holder, int position) {
DrinkQuantity drinkQuantity = listDrinkQuantity.get(position);
holder.mTvName.setText(drinkQuantity.getDrinkType());
holder.mEtQuantity.setText(Integer.toString(drinkQuantity.getQuantity()));
holder.mEtQuantity.addTextChangedListener(setTextWatcher(position, holder.mEtQuantity));
holder.mIvMinus.setOnClickListener(onClick(holder, position, "minus"));
holder.mIvAdd.setOnClickListener(onClick(holder, position, "add"));
}
@Override
public int getItemCount() {
return listDrinkQuantity.size();
}
private TextWatcher setTextWatcher(int position, EditText et){
return new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
String value = charSequence.toString();
if(!Util.isNullOrEmpty(value.trim())) {
int num = Integer.parseInt(charSequence.toString());
if(num < 0 || num > 5) {
listener.onChangeText(min, max, num);
et.setText("0");
} else {
listDrinkQuantity.get(position).quantity = num;
}
}
}
@Override
public void afterTextChanged(Editable editable) {
}
};
}
private View.OnClickListener onClick(@NonNull AddDrinkViewHolder holder, int position, String mode) {
return new View.OnClickListener() {
@SuppressLint("SetTextI18n")
@Override
public void onClick(View view) {
int qty = listDrinkQuantity.get(position).quantity;
if (mode.equals("minus")) {
if(qty == 0) {
listener.onChangeText(min,max,-1);
return; // min 0 : abort
}
qty--;
holder.mEtQuantity.setText(Integer.toString(qty));
} else if (mode.equals("add")) {
if(qty == 5) {
listener.onChangeText(min,max,6);
return; // max 5 : abort
}
qty++;
holder.mEtQuantity.setText(Integer.toString(qty));
}
}
};
}
}
DrinkDetailAdapter类public class DrinkDetailAdapter extends RecyclerView.Adapter<DrinkDataViewHolder> {
private static final String TAG = DrinkDetailAdapter.class.getSimpleName();
private ArrayList<Drink> drinkList = new ArrayList<>();
private final String NAME = "name";
private final String SUGAR = "sugar";
private final String ICE = "ice";
DrinkDetailAdapter(ArrayList<Drink> drink_list) {
drinkList = drink_list;
}
ArrayList<Drink> getDrinkDetailsArrayList() {
return drinkList;
}
void reset() {
for(int i=0; i < drinkList.size(); i++) {
drinkList.get(i).getDrinkDetails().drink_name = "";
drinkList.get(i).getDrinkDetails().sugar = "0";
drinkList.get(i).getDrinkDetails().ice = "0";
}
}
@NonNull
@Override
public DrinkDataViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.item_drink_check, parent, false);
return new DrinkDataViewHolder(itemView);
}
@Override
public void onBindViewHolder(@NonNull DrinkDataViewHolder holder, int position) {
Drink drink = drinkList.get(position);
holder.mEtName.setText(drink.getDrinkDetails().drink_name);
holder.mEtSugar.setText(drink.getDrinkDetails().sugar);
holder.mEtIce.setText(drink.getDrinkDetails().ice);
holder.mEtName.addTextChangedListener(updateData(position, NAME, holder));
holder.mEtSugar.addTextChangedListener(updateData(position, SUGAR, holder));
holder.mEtIce.addTextChangedListener(updateData(position, ICE, holder));
}
@Override
public int getItemCount() {
return drinkList.size();
}
TextWatcher updateData(int position, String editText, @NonNull DrinkDataViewHolder holder) {
return new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
switch (editText) {
case NAME:
drinkList.get(position).getDrinkDetails().drink_name = charSequence.toString();
break;
case SUGAR:
drinkList.get(position).getDrinkDetails().sugar = charSequence.toString();
break;
case ICE:
drinkList.get(position).getDrinkDetails().ice = charSequence.toString();
break;
}
}
@Override
public void afterTextChanged(Editable editable) {
}
};
}
}
获得
Drink数量后，这是更新DrinkDetailAdapter ArrayList的代码@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQUEST_CODE_ADD_DRINK) {
if (resultCode == Activity.RESULT_OK) {
try {
Bundle args = data.getBundleExtra("args");
if (args != null) {
drinkCheckResponse = args.getParcelable(DRINK_CHECK_RESPONSE);
drinkQuantityList.clear();
drinkQuantityList.addAll(drinkCheckResponse.getData().drink_quantities);
}
} catch (Exception e) {
Logger.e(TAG, "onActivityResult Exception: msg[%s]", e.getMessage());
Logger.logException(e);
}
updateDrinkList();
}
}
}
private void updateDrinkList() {
for(int i = 0; i < drinkQuantityList.size(); i++) {
setDrinkList(drinkQuantityList.get(i).drink_type, drinkQuantityList.get(i).quantity);
}
drinkDetailsAdapter.notifyDataSetChanged();
}
private void setDrinkList(String name, int enteredQuantity) {
int drinkTypeCount = drinkTypeCount(name);
int diffCount = enteredQuantity-drinkTypeCount;
if (diffCount != 0) {
addRemoveDrink(diffCount, enteredQuantity, name);
}
}
private int drinkTypeCount(String name) {
int count = 0;
for(int i=0; i < drinkList.size(); i++) {
String subName = drinkList.get(i).getDrinkDetails().drink_name.substring(0, drinkList.get(i).getDrinkDetails().drink_name.indexOf("(")).trim();
if(subName.equals(name)) {
count++;
}
}
return count;
}
private void addRemoveDrink(int diffCount, int enteredQuantity, String name) {
if(diffCount > 0) {
for(int i=enteredQuantity-diffCount+1; i <= enteredQuantity; i++) {
DrinkDetails drinkDetails = new DrinkDetails(name + " (" + i + ")");
drinkList.add(new Drink(drinkDetails));
}
} else if(diffCount < 0) {
for(int i=enteredQuantity-diffCount; i > enteredQuantity; i--) {
for (Iterator<Drink> iterator = drinkList.iterator(); iterator.hasNext();) {
Drink drink = iterator.next();
if (drink.getDrinkDetails().drink_name.equals(name + " (" + i + ")")) {
// Remove the current element from the iterator and the list.
iterator.remove();
drinkDetailsAdapter.notifyItemRemoved(drinkList.indexOf(drink));
}
}
}
}
Collections.sort(drinkList);
Log.d(TAG, "addRemoveDrink: " + drinkList.size());
}
这是我添加10-15数量（所有饮料类型的总和），然后将每种类型的数量减去0或1时收到的错误。
E/AndroidRuntime: FATAL EXCEPTION: main
Process: my.com.time.tapins, PID: 4143
java.lang.IndexOutOfBoundsException: Index: 13, Size: 3
at java.util.ArrayList.get(ArrayList.java:437)
at my.com.time.tapins.ui.drinkcheck.DrinkDetailAdapter$3.onTextChanged(DrinkDetailAdapter.java:121)
at android.widget.TextView.sendOnTextChanged(TextView.java:10535)
at android.widget.TextView.setText(TextView.java:6272)
at android.widget.TextView.setText(TextView.java:6097)
at android.widget.TextView.setText(TextView.java:6049)
at my.com.time.tapins.ui.drinkcheck.DrinkDetailAdapter.onBindViewHolder(DrinkDetailAdapter.java:67)
at my.com.time.tapins.ui.drinkcheck.DrinkDetailAdapter.onBindViewHolder(DrinkDetailAdapter.java:21)
at androidx.recyclerview.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:6781)
at androidx.recyclerview.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:6823)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:5752)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:6019)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5858)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5854)
at androidx.recyclerview.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2230)
at androidx.recyclerview.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1557)
at androidx.recyclerview.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1517)
at androidx.recyclerview.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:612)
at androidx.recyclerview.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3924)
at androidx.recyclerview.widget.RecyclerView.onMeasure(RecyclerView.java:3336)
at android.view.View.measure(View.java:24530)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6828)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:842)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
at android.view.View.measure(View.java:24530)
at androidx.core.widget.NestedScrollView.measureChildWithMargins(NestedScrollView.java:1502)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at androidx.core.widget.NestedScrollView.onMeasure(NestedScrollView.java:556)
at android.view.View.measure(View.java:24530)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6828)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.view.View.measure(View.java:24530)
at androidx.constraintlayout.widget.ConstraintLayout.internalMeasureChildren(ConstraintLayout.java:1227)
at androidx.constraintlayout.widget.ConstraintLayout.onMeasure(ConstraintLayout.java:1572)
at android.view.View.measure(View.java:24530)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6828)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at androidx.appcompat.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:143)
at android.view.View.measure(View.java:24530)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6828)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:842)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
at android.view.View.measure(View.java:24530)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6828)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.view.View.measure(View.java:24530)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6828)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:842)
E/AndroidRuntime: at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
at android.view.View.measure(View.java:24530)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6828)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at com.android.internal.policy.DecorView.onMeasure(DecorView.java:742)
at android.view.View.measure(View.java:24530)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:3006)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1833)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2122)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1721)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7598)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:966)
at android.view.Choreographer.doCallbacks(Choreographer.java:790)
at android.view.Choreographer.doFrame(Choreographer.java:725)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:951)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7356)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
E/UncaughtException: java.lang.IndexOutOfBoundsException: Index: 13, Size: 3
at java.util.ArrayList.get(ArrayList.java:437)
at my.com.time.tapins.ui.drinkcheck.DrinkDetailAdapter$3.onTextChanged(DrinkDetailAdapter.java:121)
at android.widget.TextView.sendOnTextChanged(TextView.java:10535)
at android.widget.TextView.setText(TextView.java:6272)
at android.widget.TextView.setText(TextView.java:6097)
at android.widget.TextView.setText(TextView.java:6049)
at my.com.time.tapins.ui.drinkcheck.DrinkDetailAdapter.onBindViewHolder(DrinkDetailAdapter.java:67)
at my.com.time.tapins.ui.drinkcheck.DrinkDetailAdapter.onBindViewHolder(DrinkDetailAdapter.java:21)
at androidx.recyclerview.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:6781)
at androidx.recyclerview.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:6823)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:5752)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:6019)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5858)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5854)
at androidx.recyclerview.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2230)
at androidx.recyclerview.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1557)
at androidx.recyclerview.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1517)
at androidx.recyclerview.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:612)
at androidx.recyclerview.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3924)
at androidx.recyclerview.widget.RecyclerView.onMeasure(RecyclerView.java:3336)
at android.view.View.measure(View.java:24530)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6828)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:842)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
at android.view.View.measure(View.java:24530)
at androidx.core.widget.NestedScrollView.measureChildWithMargins(NestedScrollView.java:1502)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at androidx.core.widget.NestedScrollView.onMeasure(NestedScrollView.java:556)
at android.view.View.measure(View.java:24530)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6828)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.view.View.measure(View.java:24530)
at androidx.constraintlayout.widget.ConstraintLayout.internalMeasureChildren(ConstraintLayout.java:1227)
at androidx.constraintlayout.widget.ConstraintLayout.onMeasure(ConstraintLayout.java:1572)
at android.view.View.measure(View.java:24530)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6828)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at androidx.appcompat.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:143)
at android.view.View.measure(View.java:24530)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6828)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:842)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
at android.view.View.measure(View.java:24530)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6828)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.view.View.measure(View.java:24530)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6828)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:842)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
at android.view.View.measure(View.java:24530)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6828)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at com.android.internal.policy.DecorView.onMeasure(DecorView.java:742)
at android.view.View.measure(View.java:24530)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:3006)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1833)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2122)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1721)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7598)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:966)
at android.view.Choreographer.doCallbacks(Choreographer.java:790)
at android.view.Choreographer.doFrame(Choreographer.java:725)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:951)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7356)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
基本上，这是这两个
RecyclerView适配器的2页。添加/删除饮料量的屏幕截图
显示饮料详细信息的屏幕截图
Drink类public class Drink implements Comparable<Drink>, Parcelable {
private DrinkDetails drink_details;
public Drink() {
}
public Drink(DrinkDetails drink_details) {
this.drink_details = drink_details;
}
protected Drink(Parcel in) {
}
public static final Creator<Drink> CREATOR = new Creator<Drink>() {
@Override
public Drink createFromParcel(Parcel in) {
return new Drink(in);
}
@Override
public Drink[] newArray(int size) {
return new Drink[size];
}
};
public DrinkDetails getDrinkDetails() {
return drink_details;
}
private String getDrinkName() {
return getDrinkDetails().drink_name;
}
@Override
public int compareTo(Drink drink) {
if(drink.drink_details.drink_name.compareToIgnoreCase(getDrinkName()) > 0){
return -1;
} else if(drink.drink_details.drink_name.compareToIgnoreCase(getDrinkName()) < 0){
return 1;
}
return 0;
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel parcel, int i) {
}
}
DrinkQuantity类public class DrinkQuantity implements Parcelable {
public String drink_type;
public int quantity;
public DrinkQuantity() {
}
public DrinkQuantity(String drink_type, int quantity) {
this.drink_type = drink_type;
this.quantity = quantity;
}
protected DrinkQuantity(Parcel in) {
drink_type = in.readString();
quantity = in.readInt();
}
public static final Creator<DrinkQuantity> CREATOR = new Creator<DrinkQuantity>() {
@Override
public DrinkQuantity createFromParcel(Parcel in) {
return new DrinkQuantity(in);
}
@Override
public DrinkQuantity[] newArray(int size) {
return new DrinkQuantity[size];
}
};
public String getDrinkType() {
return drink_type;
}
public int getQuantity() {
return quantity;
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel parcel, int i) {
parcel.writeString(drink_type);
parcel.writeInt(quantity);
}
}
我发现结构非常混乱，因为
AddDrinkAdapter使用ArrayList<DrinkQuantity>和DrinkDetailAdapter使用ArrayList<Drink>然后我需要执行循环以匹配这两个列表。如果有人可以更改结构以使其更好，请告诉我。谢谢。 最佳答案
在这个问题上调试了几个小时之后，终于我看到了问题所在。
我的updateData函数是一个导致我出现问题的函数，因为它保留了原始的int position。
因此，这是我更新的代码来解决此问题。DrinkDetailAdapter类
TextWatcher updateData(String editText, @NonNull DrinkDataViewHolder holder) {
return new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
Drink drink = getDrink(holder.mTvDrinkName.getText().toString());
if(drink == null) return;
switch (editText) {
switch (editText) {
case NAME:
drinkList.get(drinkList.indexOf(drink)).getDrinkDetails().drink_name = charSequence.toString();
break;
case SUGAR:
drinkList.get(drinkList.indexOf(drink)).getDrinkDetails().sugar = charSequence.toString();
break;
case ICE:
drinkList.get(drinkList.indexOf(drink)).getDrinkDetails().ice = charSequence.toString();
break;
}
}
}
@Override
public void afterTextChanged(Editable editable) {
}
};
}
private Drink getDrink(String name) {
for (Drink drink : drinkList) {
if (drink.getDrinkDetails().drink_name.equalsIgnoreCase(name))
return drink;
}
return null;
}