Question

我有一个数据库，需要更改以删除和添加值并创建这样一个ContextMenu，我有机会更改并删除单击的项目。但是我需要知道列表项的id并且在contextMenu中，所以有菜单的id。我正在做正确的事情，或者有更简单的方法。

    public boolean onContextItemSelected(MenuItem item) {
        //Iniciação da Base de dados
        final HelperDB MyHelper = new HelperDB(this.getActivity());
        SQLiteDatabase db = MyHelper.getWritableDatabase();

        String[] projection = {Contrato_DB.CidadeEntry._ID, COLUMN_NOME,
        };
        // How you want the results sorted in the resulting Cursor
        String sortOrder = COLUMN_NOME + " ASC ";

        String[] columns = new String[] { "_id", "nome" };
        final Cursor c = db.rawQuery("SELECT * FROM cidade ", null);
        c.moveToFirst();

        final AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item.getMenuInfo();
        switch (item.getItemId()) {

            case R.id.update: // <-- your custom menu item id here

                int id = item.getItemId();
                final AlertDialog.Builder alert = new AlertDialog.Builder(getActivity());
                final EditText input = new EditText(getActivity());
                Toast.makeText(this.getActivity(),c.getString(tmp),Toast.LENGTH_LONG).show();
                alert.setTitle("Editar :" + c.getString(tmp));
                alert.setView(input);
                alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {
                        String value = input.getText().toString().trim();

Answer 1

获取数据库ID，您只需执行此操作

final AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item.getMenuInfo();
long id = info.id;

将列表项ID传递给contextmenu Click方法

1 个答案: