我无法插入表格

Question

我在将数据插入我的sqlite表时遇到问题，我想添加，更新和删除用户。添加用户时出现以下错误：

E/SQLiteDatabase: Error inserting name=new address=9849 age=text phone_number=123
android.database.sqlite.SQLiteException: table Customer_Info has no column named name (code 1): , while compiling: INSERT INTO Customer_Info(name,address,age,phone_number) VALUES (?,?,?,?)

我的MainActivity：

public class MainActivity extends AppCompatActivity {
private RecyclerView mRecyclerView;
private RecyclerView.LayoutManager mLayoutManager;
private DatabaseHelper dbHelper;
private PersonAdapter adapter;
private String filter = "";
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mRecyclerView = (RecyclerView)findViewById(R.id.recyclerView);
    mRecyclerView.setHasFixedSize(true);
    // use a linear layout manager
    mLayoutManager = new LinearLayoutManager(this);
    mRecyclerView.setLayoutManager(mLayoutManager);
    populaterecyclerView(filter);
}
private void populaterecyclerView(String filter){
    dbHelper = new DatabaseHelper(this);
    adapter = new PersonAdapter(dbHelper.personList(filter), this, mRecyclerView);
    mRecyclerView.setAdapter(adapter);

}
public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.home_menu, menu);


    return true;
}
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle item selection
    switch (item.getItemId()) {
        case R.id.addMenu:
            Toast.makeText(this, "Clicked", Toast.LENGTH_SHORT).show();
            goToAddUserActivity();
            return true;
        default:
            return super.onOptionsItemSelected(item);
    }
}
private void goToAddUserActivity(){
    Intent intent = new Intent(MainActivity.this, AddRecordActivity.class);
    startActivity(intent);
}

@Override
protected void onResume() {
    super.onResume();
    adapter.notifyDataSetChanged();
}

} 我的DatabaseHelper.class

public class DatabaseHelper extends SQLiteOpenHelper {

public static final String DATABASE_NAME = "Customers";
private static final int DATABASE_VERSION = 3;

public static final String TABLE_NAME = "Customer_Info";

public static final String COLUMN_ID = "_id";
public static final String COLUMN_PERSON_NAME = "name";
public static final String COLUMN_PERSON_AGE = "age";
public static final String COLUMN_PERSON_PH = "phone_number";
public static final String COLUMN_PERSON_Address = "address";

public DatabaseHelper(@Nullable Context context) {
    super(context, DATABASE_NAME, null, DATABASE_VERSION);
}


@Override
public void onCreate(SQLiteDatabase db) {
    db.execSQL(" CREATE TABLE " + TABLE_NAME + "(" +
            COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
            COLUMN_PERSON_Address + " TEXT NOT NULL, " +
            COLUMN_PERSON_NAME + " TEXT NOT NULL, " +
            COLUMN_PERSON_AGE + " NUMBER NOT NULL, " +
            COLUMN_PERSON_PH + " NUMBER NOT NULL );"
    );
}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    // you can implement here migration process
    db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
    this.onCreate(db);
}

public void saveNewPerson(Person person) {
    SQLiteDatabase sqLiteDatabase = this.getWritableDatabase();
    ContentValues values = new ContentValues();

    values.put(COLUMN_PERSON_Address, person.getAddress());
    values.put(COLUMN_PERSON_NAME, person.getName());
    values.put(COLUMN_PERSON_AGE, person.getAge());
    values.put(COLUMN_PERSON_PH, person.getPhone_number());

    sqLiteDatabase.insert(TABLE_NAME, null, values);
    sqLiteDatabase.close();
}

public List<Person> personList(String list) {
    String query;
    if (list.equals("")) {
        //regular query
        query = "SELECT  * FROM " + TABLE_NAME;
    } else {
        //filter results by filter option provided
        query = "SELECT  * FROM " + TABLE_NAME + " ORDER BY " + list;
    }
    List<Person> peopleLinkedList = new LinkedList<>();
    SQLiteDatabase database = this.getWritableDatabase();
    Cursor cursor = database.rawQuery(query, null);
    Person person;

    if (cursor.moveToFirst()) {
        do {
            person = new Person();
            person.setId(cursor.getLong(cursor.getColumnIndex(COLUMN_ID)));
            person.setName(cursor.getString(cursor.getColumnIndex(COLUMN_PERSON_NAME)));
            person.setAge(cursor.getString(cursor.getColumnIndex(COLUMN_PERSON_AGE)));
            person.setAddress(cursor.getString(cursor.getColumnIndex(COLUMN_PERSON_Address)));
            person.setPhone_number(cursor.getString(cursor.getColumnIndex(COLUMN_PERSON_PH)));
            peopleLinkedList.add(person);

        } while (cursor.moveToNext());
    }

    return peopleLinkedList;
}

/**
 * Query only 1 record
 **/

public Person getPerson(long id) {
    SQLiteDatabase db = this.getWritableDatabase();
    String query = "SELECT  * FROM " + TABLE_NAME + " WHERE _id=" + id;
    Cursor cursor = db.rawQuery(query, null);
    Person receivedPerson = new Person();
    if (cursor.getCount() > 0) {
        cursor.moveToFirst();

        receivedPerson.setAddress(cursor.getString(cursor.getColumnIndex(COLUMN_PERSON_Address)));
        receivedPerson.setName(cursor.getString(cursor.getColumnIndex(COLUMN_PERSON_NAME)));
        receivedPerson.setAge(cursor.getString(cursor.getColumnIndex(COLUMN_PERSON_AGE)));
        receivedPerson.setPhone_number(cursor.getString(cursor.getColumnIndex(COLUMN_PERSON_PH)));

    }

    return receivedPerson;
}




}

}

添加用户活动：

public class AddRecordActivity extends AppCompatActivity {

private EditText mNameEditText;
private EditText mAgeEditText;
private EditText mAddressEt;
private EditText mPh;
private Button mAddBtn;

private DatabaseHelper dbHelper;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_add_record);

    //init
    mNameEditText = (EditText)findViewById(R.id.userName);
    mAgeEditText = (EditText)findViewById(R.id.userAge);
    mAddressEt = (EditText)findViewById(R.id.addressAdd);
    mPh = (EditText)findViewById(R.id.ph_no);
    mAddBtn = (Button)findViewById(R.id.addNewUserButton);

    //listen to add button click
    mAddBtn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            //call the save person method
            savePerson();
        }
    });

}

private void savePerson(){
    String address = mAddressEt.getText().toString().trim();
    String name = mNameEditText.getText().toString().trim();
    String age = mAgeEditText.getText().toString().trim();
    String ph = mPh.getText().toString().trim();
    dbHelper = new DatabaseHelper(this);

    if(name.isEmpty()){
        //error name is empty
        Toast.makeText(this, "You must enter a name", Toast.LENGTH_SHORT).show();
    }

    if(age.isEmpty()){
        //error name is empty
        Toast.makeText(this, "You must enter an age", Toast.LENGTH_SHORT).show();
    }

    if(address.isEmpty()){
        //error name is empty
        Toast.makeText(this, "You must enter an occupation", Toast.LENGTH_SHORT).show();
    }

    if(ph.isEmpty()){
        //error name is empty
        Toast.makeText(this, "You must enter an image link", Toast.LENGTH_SHORT).show();
    }

    //create new person
    Person person = new Person(address, name, age,ph);
    dbHelper.saveNewPerson(person);

    //finally redirect back home
    // NOTE you can implement an sqlite callback then redirect on success delete
    goBackHome();

}

private void goBackHome(){
    startActivity(new Intent(AddRecordActivity.this, MainActivity.class));
}

} 我正在制作一个可以在我的应用程序中执行CRUD操作的普通表单，通过在提交表单以添加用户时出现上述错误，有人可以提示我我在做什么错，为什么没有添加用户

Answer 1

您输入了错误的年龄

Error inserting name=new address=9849 age=text phone_number=123

年龄是数字，您要插入“文本”

您可以通过强制用户输入文本或数字来在XML中进行更改

供您使用的名称和地址edittext

        android:inputType="text"

您的年龄和手机使用情况

        android:inputType="number"

Answer 2

我不知道整体情况，但是在已经创建表之后在表中添加新行时遇到了类似的问题。如果要在创建表后向表中添加新行，请尝试删除该表并重新创建。

删除

 sqLiteDatabase.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);