Java 安卓SQLite，can'；在我的listView中不再查看数据

昨天我制作了一个很好的列表视图来查看我的数据库，但今天我试图在线添加到我的数据库，我收到一条错误消息，上面写着“数据库泄漏。blabla关闭你的数据库”。在那之后，我再也不能向我的数据库添加行了

但我重新启动了android studio，我可以添加新的行（并且不再出错）！但我看不到我添加的新闻行。我只看到我在错误之前添加的行（或者我可以看到我添加的导致错误的行）。我用chrome检查了我的数据库，我看到了一切，所以我真的添加了新闻行

我不知道发生了什么事，我检查了好几节课的历史，但我没有做出任何不好的改变（我想）。如何再次查看所有数据库？ 我还使用ContentProvider访问我的数据库

下面是带有列表视图的片段类（我在列表视图和一些文本视图的元素中使用2个按钮）：

然后，我的listView布局：

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您需要使用方法通知

游标

内容已更改。更新数据时，您将希望在自定义ContentProvider中执行此操作。此调用允许注册更改通知的游标刷新其数据。

请查看。似乎你也有类似的问题。

public class ViewCardEditor extends Fragment implements LoaderManager.LoaderCallbacks<Cursor> {
    public static final String authority = "com.example.jean.cartememoire.CardContentProvider";
    public String[] from;
    public final int[] to = {R.id.idList, R.id.themeList, R.id.questionList, R.id.reponseList, R.id.difficultList};
    StockCard stock;
    ViewGroup container;
    ListView listView;
    MySimpleCursorAdapter adapter;
    private ArrayList<String> data = new ArrayList<String>();



    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup c,
                             Bundle savedInstanceState) {
        container = c;
        View view = inflater.inflate(R.layout.fragment_view_card_editor, container, false);
        stock = StockCard.getInstance(container.getContext());
        from = new String[]{stock._ID,
                stock.THEME,
                stock.QUESTION,
                stock.REPONSE,
                stock.DIFFICULTE};

        // Inflate the layout for this fragment
        if (container != null) {
            container.removeAllViews();
        }
        databaseView(view);

        return view;
    }

    public Loader<Cursor> onCreateLoader(int id, Bundle args) {
        Uri.Builder builder = new Uri.Builder();
        Uri uri = builder.scheme("content").authority(authority)
                .appendPath(stock.STOCK_TABLE).build();
        return new CursorLoader(container.getContext(), uri, from,
                null, null, null);
    }
    public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
        adapter.swapCursor(data);
    }
    public void onLoaderReset(Loader<Cursor> loader) {
        adapter.swapCursor(null);
    }



    public void databaseView(View view)
    {
        ArrayList<String> list;
        Cursor cursor = stock.getData();

        listView = (ListView) view.findViewById(R.id.listView);

        adapter = new MySimpleCursorAdapter(container.getContext(), R.layout.card_stock, null, from, to,0);
        listView.setAdapter(adapter);

        LoaderManager manager = getLoaderManager();
        manager.initLoader(0, null, this);

    }


    public void deleteOneCard(int id)
    {
        Uri.Builder builder = new Uri.Builder();
        builder.scheme("content").authority(authority).appendPath(stock.STOCK_TABLE);

        ContentUris.appendId(builder, id);
        Uri uri = builder.build();
        ContentResolver resolver = container.getContext().getContentResolver();
        resolver.delete(uri, null, null);

    }

    private class MySimpleCursorAdapter extends SimpleCursorAdapter
    {
        ViewHolder vh;
        public MySimpleCursorAdapter(Context context, int layout, Cursor c, String[] from, int[] to, int flags) {
            super(context, layout, c, from, to, flags);

        }

        public View newView(Context _context, Cursor _cursor, ViewGroup parent) {
            LayoutInflater inflater = (LayoutInflater) _context.getSystemService(_context.LAYOUT_INFLATER_SERVICE);
            View view = inflater.inflate(R.layout.card_stock, parent, false);
            vh = new ViewHolder();
            vh.idList = (TextView) view.findViewById(R.id.idList);
            vh.themeList = (TextView) view.findViewById(R.id.themeList);
            vh.questionList = (TextView) view.findViewById(R.id.questionList);
            vh.reponseList = (TextView) view.findViewById(R.id.reponseList);
            vh.difficulteList = (TextView) view.findViewById(R.id.difficultList);
            vh.Supprimer = (Button) view.findViewById(R.id.buttonDelete);
            vh.Modifier = (Button) view.findViewById(R.id.buttonModifier);


            view.setTag(vh);
            return view;
        }

        public void bindView(View view, Context Context, Cursor cursor) {
            vh.idList.setText(cursor.getString(cursor.getColumnIndex(stock._ID)));
            vh.themeList.setText(cursor.getString(cursor.getColumnIndex(stock.THEME)));
            vh.questionList.setText(cursor.getString(cursor.getColumnIndex(stock.QUESTION)));
            vh.reponseList.setText(cursor.getString(cursor.getColumnIndex(stock.REPONSE)));
            vh.difficulteList.setText(cursor.getString(cursor.getColumnIndex(stock.DIFFICULTE)));

            vh.Supprimer.setOnClickListener(new View.OnClickListener()
            {
                public void onClick(View v) {
                    View parentView = (View)v.getParent();
                    TextView idList = (TextView) parentView.findViewById(R.id.idList);
                    /*TextView themeList = (TextView) parentView.findViewById(R.id.themeList);
                    TextView questionList = (TextView) parentView.findViewById(R.id.questionList);
                    TextView reponseList = (TextView) parentView.findViewById(R.id.reponseList);
                    TextView difficulteList = (TextView) parentView.findViewById(R.id.difficultList);*/

                    int id = Integer.parseInt(idList.getText().toString());
                    deleteOneCard(id);
                    Toast.makeText(container.getContext(), "Suppression de "+id, Toast.LENGTH_SHORT).show();
                }
            });

            vh.Modifier.setOnClickListener(new View.OnClickListener()
            {
                public void onClick(View v) {
                    View parentView = (View)v.getParent();
                    TextView idList = (TextView) parentView.findViewById(R.id.idList);
                    TextView themeList = (TextView) parentView.findViewById(R.id.themeList);
                    themeList.setFocusable(true);
                    themeList.requestFocus();
                    /*TextView questionList = (TextView) parentView.findViewById(R.id.questionList);
                    TextView reponseList = (TextView) parentView.findViewById(R.id.reponseList);
                    TextView difficulteList = (TextView) parentView.findViewById(R.id.difficultList);*/

                    int id = Integer.parseInt(idList.getText().toString());
                    Toast.makeText(container.getContext(), "bouton Modifier pour "+id, Toast.LENGTH_SHORT).show();
                }
            });

        }
    }



    public class ViewHolder
    {
        Button Supprimer, Modifier;
        TextView idList, themeList, questionList, reponseList, difficulteList;

    }
}

public class AddCardEditor extends Fragment {
    EditText editTheme, editQuest, editRep;
    RatingBar ratingBar;
    Button buttonCreateCard;
    CardContentProvider stock;
    ViewGroup container;
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup c,
                             Bundle savedInstanceState) {
        View view;
        view = inflater.inflate(R.layout.fragment_add_card_editor, container, false);
        // Inflate the layout for this fragment
        container = c;
        if (container != null) {
            container.removeAllViews();
        }
        editTheme =(EditText) view.findViewById(R.id.editTheme);
        editQuest =(EditText) view.findViewById(R.id.editQuest);
        editRep =(EditText) view.findViewById(R.id.editRep);
        ratingBar =(RatingBar) view.findViewById(R.id.ratingBar);
        buttonCreateCard =(Button) view.findViewById(R.id.buttonCreateCard);
        stock = new CardContentProvider();
        addData(container);
        return view;
    }

    public void addData(final ViewGroup container)
    {

            buttonCreateCard.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    try
                    {
                        ContentValues cv = new ContentValues();
                        CardContentProvider cp = new CardContentProvider();
                        cv.put(stock.THEME, editTheme.getText().toString());
                        cv.put(stock.QUESTION, editQuest.getText().toString());
                        cv.put(stock.REPONSE, editRep.getText().toString());
                        cv.put(stock.DIFFICULTE, ratingBar.getRating());

                        ContentResolver resolver = container.getContext().getContentResolver();
                        Uri.Builder builder = new Uri.Builder();
                        System.out.println("addDATA DEBUG");
                        builder.scheme("content").authority(stock.authority).appendPath(stock.STOCK_TABLE);
                        System.out.println("addDATA DEBUG2");
                        Uri uri = builder.build();
                        uri = resolver.insert(uri,cv);
                        long id = ContentUris.parseId(uri);
                        System.out.println("addDATA DEBUG3 : "+id);
                        Toast.makeText(container.getContext(), "Carte créé avec succès !", Toast.LENGTH_SHORT).show();
                    }
                    catch (Exception e)
                    {
                        Toast.makeText(container.getContext(), "Erreur, echec de création de la carte", Toast.LENGTH_SHORT).show();
                    }


                }
            });

    }


}