RecyclerView正在复制项目 [英] RecyclerView is duplicating items
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问题描述
滚动时我的recyclerview正在复制项目，并且我已经在调用 adapter.notifyDataSetChanged().
My recyclerview is duplicating items when I roll it and I'm already calling adapter.notifyDataSetChanged().
因此，可能是我在错误的地方打电话给数据集更新，但是我找不到它的工作原理.
So, probably I'm calling data set update at wrong place, but I can't find how it works.
这是一些代码:
RecyclerView packageRecyclerView;
Intent intent;
ChecklistAdapter recyclerViewAdapter;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_checklist);
intent = getIntent();
size = intent.getIntExtra("size", 0);
Log.d(TAG, "onCreate - Qtd Questões: " + size);
packageRecyclerView = findViewById(R.id.package_lst);
LinearLayoutManager recyclerLayoutManager = new LinearLayoutManager(this);
packageRecyclerView.setLayoutManager(recyclerLayoutManager);
DividerItemDecoration dividerItemDecoration =
new DividerItemDecoration(packageRecyclerView.getContext(),
recyclerLayoutManager.getOrientation());
packageRecyclerView.addItemDecoration(dividerItemDecoration);
List<Checklist> modelList = new ArrayList<>();
recyclerViewAdapter = new ChecklistAdapter(modelList,this);
modelList = getPackages();
recyclerViewAdapter = new ChecklistAdapter(modelList,this);
// recyclerViewAdapter = new ChecklistAdapter(getPackages(),this);
packageRecyclerView.setAdapter(recyclerViewAdapter);
}
private List<Checklist> getPackages() {
List<Checklist> modelList = new ArrayList<>();
Log.d(TAG, "getPackages: " + size);
for (int i=0; i<size;i++) {
List<String> priceList = new ArrayList<>();
priceList.add("Sim");
priceList.add("Não");
priceList.add("Não se Aplica");
modelList.add(new Checklist(intent.getStringExtra("q"+i), priceList));
}
recyclerViewAdapter.notifyDataSetChanged();
return modelList;
}
这是我的适配器:
public class ChecklistAdapter extends
RecyclerView.Adapter<ChecklistAdapter.ViewHolder> {
private List<Checklist> packageList;
private Context context;
public ChecklistAdapter(List<Checklist> packageListIn
, Context ctx) {
packageList = packageListIn;
context = ctx;
}
@Override
public int getItemViewType(int position) {
return super.getItemViewType(position);
}
@Override
public void setHasStableIds(boolean hasStableIds) {
super.setHasStableIds(hasStableIds);
}
@Override
public long getItemId(int position) {
return super.getItemId(position);
}
@Override
public ChecklistAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.rv_checklistlines, parent, false);
ChecklistAdapter.ViewHolder viewHolder =
new ChecklistAdapter.ViewHolder(view);
return viewHolder;
}
@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position, @NonNull List<Object> payloads) {
super.onBindViewHolder(holder, position, payloads);
}
@Override
public void onBindViewHolder(ChecklistAdapter.ViewHolder holder,
int position) {
Checklist packageModel = packageList.get(position);
holder.packageName.setText(packageModel.getTitle());
int id = (position+1)*100;
for(String price : packageModel.getQuestions()){
RadioButton rb = new RadioButton(ChecklistAdapter.this.context);
rb.setId(id++);
rb.setText(price);
holder.priceGroup.addView(rb);
}
}
@Override
public int getItemCount() {
return packageList.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
public TextView packageName;
public RadioGroup priceGroup;
public ViewHolder(View view) {
super(view);
packageName = view.findViewById(R.id.package_name);
priceGroup = view.findViewById(R.id.price_grp);
priceGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup radioGroup, int i) {
Toast.makeText(ChecklistAdapter.this.context,
"Radio button clicked " + radioGroup.getCheckedRadioButtonId(),
Toast.LENGTH_SHORT).show();
}
});
}
}
}
在下面的图像中，您可以看到单选按钮已重复，并且所有行中都有一些额外的空格.我在这里和另一个论坛上都看到了很多与此有关的问题，但是我不清楚该更新数据集在何处调用.
In the image below you can see that radio buttons are duplicated and there is some extra blank space in all rows. I saw many questions here and in another forums about this, but it's not clear to me where to call this update dataset.
我不是一名高级Android开发人员，所以如果您能解释一下，这对我来说会更容易.
I'm not an advanced Android developer, so if you can explain, it will be easier to me.
编辑1
清单类:
import java.util.List;
public class Checklist {
String title;
List<String> questions;
public Checklist(String title, List<String> questions) {
this.title = title;
this.questions = questions;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public List<String> getQuestions() {
return questions;
}
public void setQuestions(List<String> questions) {
this.questions = questions;
}
编辑2
适配器代码已更新
推荐答案
我复制了您的问题.
添加 holder.priceGroup.removeAllViews(); 可以解决该问题.像这样:
adding holder.priceGroup.removeAllViews(); on onBindViewHolder will fix it. Like so:
@Override
public void onBindViewHolder(ChecklistAdapter.ViewHolder holder,
int position) {
Checklist packageModel = packageList.get(position);
holder.packageName.setText(packageModel.getTitle());
int id = (position+1)*100;
holder.priceGroup.removeAllViews();
for(String price : packageModel.getQuestions()){
RadioButton rb = new RadioButton(ChecklistAdapter.this.context);
rb.setId(id++);
rb.setText(price);
holder.priceGroup.addView(rb);
}
}
您每次都在不删除先前视图的情况下添加到视图.
You were adding to the view every time without removing the previous views.
这篇关于RecyclerView正在复制项目的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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