Question

所以，这里有一个问题，我有两个班级，Class Title一个人的信息，即姓名，地址，网站，电话等，当人选择保存按钮时，他所有的个人资料都保存在SQlite中，他是转移到Class Newscene，它有一个编辑文本视图，人们可以在其中编写故事。当他写这个故事时，我希望它能够与最近保存的标题的ID保存在一起。但不是这样做，程序崩溃并给我错误。我的标题类的代码，我从中插入一个人的详细信息到数据库

EditText title=(EditText)findViewById(R.id.editText1);
                EditText author=(EditText)findViewById(R.id.editText2);
                EditText company=(EditText)findViewById(R.id.editText3);
                EditText address=(EditText)findViewById(R.id.editText4);
                EditText email=(EditText)findViewById(R.id.editText5);
                EditText website=(EditText)findViewById(R.id.editText6);
                EditText phone=(EditText)findViewById(R.id.editText7);
                title1=title.getText().toString();
                author1=author.getText().toString();
                company1=company.getText().toString();
                address1=address.getText().toString();
                email1=email.getText().toString();
                website1=website.getText().toString();
                phone1=phone.getText().toString();

                DatabaseHandler db = new DatabaseHandler(this);

                /**
                 * CRUD Operations
                 * */
                // Inserting Contacts
                Log.d("Insert: ", "Inserting ..");
                db.addContact(new Contact(0, title1, author1,company1, address1, email1, website1, phone1, script1));

                // Reading all contacts
                Log.d("Reading: ", "Reading all contacts..");
                List<Contact> contacts = db.getAllContacts();

                for (Contact cn : contacts) {
                    String log = "Id: "+cn.getID()+" ,Name: " + cn.get_name() + " ,Author: " + cn.get_author() + " ,company: " + cn.get_company() + " ,address: " + cn.get_address()
                    + " ,email: " + cn.get_email() + " ,Website: " + cn.get_website() + " ,Phone: " + cn.getPhoneNumber() + " ,Script: " + cn.getscript();
                        // Writing Contacts to log
                Log.d("Name: ", log);
                name_title=cn.getName().toString();
                }  

                        //Passing id through intent 
                Intent i = new Intent(Title.this,Newscene.class);
                i.putExtra("EXTRA_ID", id );
                startActivity(i);

这是我在Newscene Class中获取它的地方

        protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.activity_newscene);

                Intent i = getIntent();
                idval = i.getStringExtra("EXTRA_ID").toString();
                // i am converting this idval string to integer below

                }

然后在同一个班级中，一个人在其立即保存在

中的edittext中写下的所有内容

         String strSaveindb = previous + scene1 + ending;

然后我在我的Contact类中设置它并像这样更新数据库（这是在Newscene活动中完成的）

            cn.setscript(strSaveindb);
            db.updateContactscript(db.getContact(1));

现在在我的Databasehandler类中，我有updatecontact函数和updatecontactscript函数，以下是我的数据库处理程序类的代码

public void onCreate(SQLiteDatabase db) {
        String CREATE_CONTACTS_TABLE = "CREATE TABLE " + TABLE_CONTACTS + "("
                + KEY_ID + " INTEGER PRIMARY KEY,"
                + KEY_NAME + " TEXT,"
                + KEY_AUTHOR + " TEXT,"
                + KEY_COMPANY + " TEXT,"
                + KEY_ADDRESS + " TEXT,"
                + KEY_EMAIL + " TEXT,"
                + KEY_WEBSITE + " TEXT,"
                + KEY_PH_NO + " TEXT,"
                + KEY_SCRIPT + "TEXT" + ")";
        db.execSQL(CREATE_CONTACTS_TABLE);
    }

这是添加联系人功能

void addContact(Contact contact) {
        SQLiteDatabase db = this.getWritableDatabase();

        ContentValues values = new ContentValues();
        values.put(KEY_NAME, contact.getName()); // Contact Name
        values.put(KEY_AUTHOR, contact.getPhoneNumber());
        values.put(KEY_COMPANY, contact.getPhoneNumber());
        values.put(KEY_ADDRESS, contact.getPhoneNumber());
        values.put(KEY_EMAIL, contact.getPhoneNumber());
        values.put(KEY_WEBSITE, contact.getPhoneNumber());
        values.put(KEY_PH_NO, contact.getPhoneNumber());
        values.put(KEY_SCRIPT, contact.getscript());// Contact Phone

        // Inserting Row
        db.insert(TABLE_CONTACTS, null, values);
        db.close(); // Closing database connection
    }

这是get conatct函数

    Contact getContact(int id) {
        SQLiteDatabase db = this.getReadableDatabase();

        Cursor cursor = db.query(TABLE_CONTACTS, new String[] { KEY_ID,
                KEY_NAME, KEY_AUTHOR, KEY_COMPANY, KEY_ADDRESS, KEY_EMAIL, KEY_WEBSITE, KEY_PH_NO , KEY_SCRIPT }, KEY_ID + "=?",
                new String[] { String.valueOf(id) }, null, null, null, null);
        if (cursor != null)
            cursor.moveToFirst();

        Contact contact = new Contact(Integer.parseInt(cursor.getString(0)),
                cursor.getString(1), cursor.getString(2),cursor.getString(3),cursor.getString(4),cursor.getString(5),cursor.getString(6),cursor.getString(7),cursor.getString(8));
        // return contact
        return contact;
    }

这些是更新联系人和更新脚本</ p>的功能

    // Updating single contact
    public int updateContact(Contact contact) {
        SQLiteDatabase db = this.getWritableDatabase();

        ContentValues values = new ContentValues();
        values.put(KEY_NAME, contact.getName());
        values.put(KEY_AUTHOR, contact.get_author());
        values.put(KEY_COMPANY, contact.get_company());
        values.put(KEY_ADDRESS, contact.get_address());
        values.put(KEY_EMAIL, contact.get_email());
        values.put(KEY_WEBSITE, contact.get_website());
        values.put(KEY_PH_NO, contact.getPhoneNumber());
        values.put(KEY_SCRIPT, contact.getscript());

        // updating row
        return db.update(TABLE_CONTACTS, values, KEY_ID + " = ?",
                new String[] { String.valueOf(contact.getID()) });
    }

    //UPDATING SCRIPT

    public int updateContactscript(Contact contact) {
        SQLiteDatabase db = this.getWritableDatabase();

        ContentValues values = new ContentValues();

        values.put(KEY_SCRIPT, contact.getscript());

        // updating row
        return db.update(TABLE_CONTACTS, values, KEY_ID + " = ?",
                new String[] { String.valueOf(contact.getID()) });
    }

如何更新最近制作的联系人ID的脚本。我现在被困在这里两天了:(

Answer 1

修正此行：

KEY_SCRIPT + "TEXT"

到

KEY_SCRIPT + " TEXT"

更新android SQlite中的某些数据库列

1 个答案: