更新查询在sqlite中不起作用

Question

我的Android应用程序中有更新查询。但它不能正常工作。单击更新应用程序的按钮时停止工作。代码如下 -

update.setOnClickListener(new OnClickListener (){

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub

            String feched_name = show_name.getText().toString();
            String get_std_for_update=id_search.getText().toString();
            String get_new_name = id_update.getText().toString();

            if(feched_name.matches("")){
                Toast.makeText(getApplicationContext(), "No Student selected", Toast.LENGTH_LONG).show();

                }

                    else {
                        if(get_new_name.matches("")){
                        Toast.makeText(getApplicationContext(), "New Name is empty", Toast.LENGTH_LONG).show(); 
                        }
                        else{
                            stdDB.execSQL("Update student set name = "+get_new_name + "where id = "+get_std_for_update);    
                            Toast.makeText(getApplicationContext(), "Student's name has been updated", Toast.LENGTH_LONG).show();   
                        }
                    }


            }

           });

Answer 1

将以下查询替换为现有查询：

stdDB.execSQL("Update student set name = '"+get_new_name + "' where id = "+get_std_for_update); 

在名称和空格周围标记单引号。

希望这有帮助。

Answer 2

试试

stdDB.execSQL("Update student set name = '"+get_new_name + "' where id = "+get_std_for_update);

或

stdDB.execSQL("Update student set name = \""+get_new_name + "\" where id = "+get_std_for_update);

请注意我添加了引号，并在where子句后添加了空格。