我正在使用一个使用RecyclerView适配器的项目，从我的sqlite数据库加载和显示简单元素，包含String引用和对图像资源的字符串引用。这部分工作正常，但我似乎无法删除任何项目。
我已经完成了代码，确保与我的数据库的连接仅在需要时打开并在之后关闭，并且此处应该没有未解决的问题。
我实际上可以在单击元素时从Recyclerview适配器内部删除项目，但如果我退出并再次输入，则已再次加载已删除的项目。这就把我的问题放在了我想的数据库中，或者也许某种决斗班卓就像函数重新创建一个已删除项目的问题。但是我现在已经多次遵循这个代码，而对于我的生活，我似乎无法解决这个问题。
在我的删除点击事件中，我正在对我的数据库和我的recyclerview适配器执行删除调用，但问题仍然存在。
我希望有任何可以帮助我查明问题的输入。我不确定在这个问题中包含哪些代码，我已经包含了我的RecyclerView适配器和数据库适配器。而且我知道在不能看到代码的情况下回答这些问题几乎是不可能的，但仍然如此。
*请原谅一塌糊涂。我一直在尝试很多东西。
// RECYCLERVIEW ADAPTER
public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.DataObjectHolder>
{
private ArrayList<Instance> instanceDataset;
private theClickListener clickListener;
public Context context;
private DBAdapter db;
private Button deleteButton;
private int thePosition;
public RecyclerViewAdapter(Context context)
{
this.context = context;
}
// ViewHolder inner class
class DataObjectHolder extends RecyclerView.ViewHolder implements View.OnClickListener
{
CardView cv;
TextView comment;
ImageView imageViewLocalAdapter;
public DataObjectHolder(final View itemView)
{
super(itemView);
cv = (CardView) itemView.findViewById(R.id.cardview_layout);
comment = (TextView) itemView.findViewById(R.id.cardview_textView);
imageViewLocalAdapter = (ImageView) itemView.findViewById(R.id.cardview_imageView);
deleteButton = (Button) itemView.findViewById(R.id.delete_button);
//itemView.setOnClickListener(this);
}
// this here displays the position of item clicked
@Override
public void onClick(View v)
{
//Intent intent = new Intent(context, SingleInstanceFragment.class);
// Log.d(" clicking ", "onClick " + getPosition());
//clickListener.onTheGreatItemClick(getPosition(), v);
}
}
public void setOnItemClickListener(theClickListener clickListener)
{
this.clickListener = clickListener;
}
public RecyclerViewAdapter(ArrayList<Instance> instanceDataSet, Context context)
{
this.instanceDataset = instanceDataSet;
this.context = context;
}
// THE VIEWHOLDER
@Override
public DataObjectHolder onCreateViewHolder(ViewGroup viewGroup, int viewType)
{
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.cardview, viewGroup, false);
DataObjectHolder dataObjectHolder = new DataObjectHolder(view);
return dataObjectHolder;
}
@Override
public void onBindViewHolder(final DataObjectHolder holder, final int position)
{
final Instance inst = instanceDataset.get(position);
openDB();
thePosition = position;
holder.comment.setText(inst.getComment());
String middle = "/sdcard/unapp/";
Uri uri = Uri.parse("file://" + middle + inst.getImage());
Picasso.with(holder.imageViewLocalAdapter.getContext())
.load(uri)
.fit().centerCrop()
.into(holder.imageViewLocalAdapter);
final RecyclerView.ViewHolder reHolder = holder;
holder.imageViewLocalAdapter.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
deleteItem(position);
Log.d("position in ", " RecyclerView Adapter " + position);
onBindViewHolder(holder, position);
// Intent intent = new Intent(context, SingleInstanceActivity.class);
// intent.putExtra("position", position);
//
// context.startActivity(intent);
}
});
}
public void addItem(Instance dataObj, int index)
{
instanceDataset.add(dataObj);
notifyItemInserted(index);
}
public void deleteItem(int index)
{
Log.d("count", "deleteItem " +getItemCount());
instanceDataset.remove(index);
db.deleteRow(index);
db.close();
notifyItemRemoved(index);
//new RecyclerViewAdapter(instanceDataset, context);
Log.d("count", "deleteItem DEUX " +getItemCount());
}
private void openDB()
{
db = new DBAdapter(this.context);
db.open();
}
@Override
public int getItemCount()
{
return instanceDataset.size();
}
public Instance getItem(int position)
{
return instanceDataset.get(position);
}
// clicklistener interface
public interface theClickListener
{
void onTheGreatItemClick(int position, View v);
}
}
// DATABASE ADAPTER
public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.DataObjectHolder>
{
private ArrayList<Instance> instanceDataset;
private theClickListener clickListener;
public Context context;
private DBAdapter db;
private Button deleteButton;
private int thePosition;
public RecyclerViewAdapter(Context context)
{
this.context = context;
}
// ViewHolder inner class
class DataObjectHolder extends RecyclerView.ViewHolder implements View.OnClickListener
{
CardView cv;
TextView comment;
ImageView imageViewLocalAdapter;
public DataObjectHolder(final View itemView)
{
super(itemView);
cv = (CardView) itemView.findViewById(R.id.cardview_layout);
comment = (TextView) itemView.findViewById(R.id.cardview_textView);
imageViewLocalAdapter = (ImageView) itemView.findViewById(R.id.cardview_imageView);
deleteButton = (Button) itemView.findViewById(R.id.delete_button);
//itemView.setOnClickListener(this);
}
// this here displays the position of item clicked
@Override
public void onClick(View v)
{
//Intent intent = new Intent(context, SingleInstanceFragment.class);
// Log.d(" clicking ", "onClick " + getPosition());
//clickListener.onTheGreatItemClick(getPosition(), v);
}
}
public void setOnItemClickListener(theClickListener clickListener)
{
this.clickListener = clickListener;
}
public RecyclerViewAdapter(ArrayList<Instance> instanceDataSet, Context context)
{
this.instanceDataset = instanceDataSet;
this.context = context;
}
// THE VIEWHOLDER
@Override
public DataObjectHolder onCreateViewHolder(ViewGroup viewGroup, int viewType)
{
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.cardview, viewGroup, false);
DataObjectHolder dataObjectHolder = new DataObjectHolder(view);
return dataObjectHolder;
}
@Override
public void onBindViewHolder(final DataObjectHolder holder, final int position)
{
final Instance inst = instanceDataset.get(position);
openDB();
thePosition = position;
holder.comment.setText(inst.getComment());
String middle = "/sdcard/unapp/";
Uri uri = Uri.parse("file://" + middle + inst.getImage());
Picasso.with(holder.imageViewLocalAdapter.getContext())
.load(uri)
.fit().centerCrop()
.into(holder.imageViewLocalAdapter);
final RecyclerView.ViewHolder reHolder = holder;
holder.imageViewLocalAdapter.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
deleteItem(position);
Log.d("position in ", " RecyclerView Adapter " + position);
onBindViewHolder(holder, position);
// Intent intent = new Intent(context, SingleInstanceActivity.class);
// intent.putExtra("position", position);
//
// context.startActivity(intent);
}
});
}
public void addItem(Instance dataObj, int index)
{
instanceDataset.add(dataObj);
notifyItemInserted(index);
}
public void deleteItem(int index)
{
Log.d("count", "deleteItem " +getItemCount());
instanceDataset.remove(index);
db.deleteRow(index);
db.close();
notifyItemRemoved(index);
//new RecyclerViewAdapter(instanceDataset, context);
Log.d("count", "deleteItem DEUX " +getItemCount());
}
private void openDB()
{
db = new DBAdapter(this.context);
db.open();
}
@Override
public int getItemCount()
{
return instanceDataset.size();
}
public Instance getItem(int position)
{
return instanceDataset.get(position);
}
// clicklistener interface
public interface theClickListener
{
void onTheGreatItemClick(int position, View v);
}
}