这是一个将个人信息值和存储带入SQLite数据库的代码。
public class AddAPersonActivity extends Activity implements View.OnClickListener, AdapterView.OnItemSelectedListener, RadioGroup.OnCheckedChangeListener {
private Button btnAdd;
private EditText etName;
private TextView tvDob;
private Spinner spNationality;
private RadioButton rbMale, rbFemale;
private Calendar birthday;
private NameValidator nameValidator;
private RadioGroup rgGenderGroup;
private String gender = "";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_a_person);
btnAdd = (Button) findViewById(R.id.btnAdd);
etName = (EditText) findViewById(R.id.etName);
tvDob = (TextView) findViewById(R.id.tvDob);
spNationality = (Spinner) findViewById(R.id.spNationality);
rbMale = (RadioButton) findViewById(R.id.rbMale);
rbFemale = (RadioButton) findViewById(R.id.rbFemale);
rgGenderGroup = (RadioGroup) findViewById(R.id.rgGenderGroup);
nameValidator = new NameValidator();
birthday = Calendar.getInstance();
Locale[] locales = Locale.getAvailableLocales();
ArrayList<String> countries = new ArrayList<>();
for(Locale locale: locales) {
String country = locale.getDisplayCountry();
if(country.trim().length() > 0 && !countries.contains(country)) {
countries.add(country);
}
}
Collections.sort(countries);
for(String country: countries) {
System.out.println(country);
}
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, countries);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spNationality.setAdapter(dataAdapter);
spNationality.setSelection(0);
spNationality.setOnItemSelectedListener(this);
tvDob.setOnClickListener(this);
rgGenderGroup.setOnCheckedChangeListener(this);
btnAdd.setOnClickListener(this);
}
void updateLabel() {
String format = "MM/dd/yy";
SimpleDateFormat dateFormat = new SimpleDateFormat(format, Locale.US);
tvDob.setText(dateFormat.format(birthday.getTime()));
}
@Override
public void onClick(View v) {
switch(v.getId()) {
case R.id.btnAdd:
String name = etName.getText().toString();
Calendar today = Calendar.getInstance();
int age = today.get(Calendar.YEAR) - today.get(Calendar.YEAR);
if(today.get(Calendar.MONTH) < birthday.get(Calendar.MONTH)) {
age--;
} else if(today.get(Calendar.MONTH) == birthday.get(Calendar.MONTH) && today.get(Calendar.DAY_OF_MONTH) < birthday.get(Calendar.DAY_OF_MONTH)) {
age--;
}
String nationality = spNationality.getSelectedItem().toString();
DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
java.util.Date currentDate = new java.util.Date();
Date currentTime = new Date(currentDate.getTime());
String created_at = dateFormat.format(currentTime);
if(!(name.length() > 0)) {
Toast.makeText(this, "Please don't leave the name empty.", Toast.LENGTH_LONG).show();
} else if(!(tvDob.getText().toString().length() > 0)) {
Toast.makeText(this, "Please set a valid birthday.", Toast.LENGTH_LONG).show();
} else if(birthday.getTime().compareTo(new java.util.Date()) > 0) {
Toast.makeText(this, "Wrong birthday. Please set the valid birthday again.", Toast.LENGTH_LONG).show();
} else if(!(rbMale.isChecked() || rbFemale.isChecked())) {
Toast.makeText(this, "Please choose your gender.", Toast.LENGTH_LONG).show();
} else if(!nameValidator.validate(etName.getText().toString())) {
Toast.makeText(this, "Wrong name. Please enter a proper name.", Toast.LENGTH_LONG).show();
} else {
Toast.makeText(this, "New person is added to the database!", Toast.LENGTH_LONG).show();
SQLiteHandler mDBHelper = new SQLiteHandler(this);
// Get the data repository in write mode
SQLiteDatabase db = mDBHelper.getWritableDatabase();
// Create a new map of values, where column names are the keys
ContentValues values = new ContentValues();
values.put(PersonalInfoEntry.COLUMN_NAME, name);
values.put(PersonalInfoEntry.COLUMN_AGE, age);
values.put(PersonalInfoEntry.COLUMN_NATIONALITY, nationality);
values.put(PersonalInfoEntry.COLUMN_GENDER, gender);
values.put(PersonalInfoEntry.COLUMN_CREATED_AT, created_at);
db.insert(PersonalInfoEntry.TABLE_NAME, null, values);
db.close();
}
break;
case R.id.tvDob:
DatePickerDialog.OnDateSetListener date = new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
birthday.set(Calendar.YEAR, year);
birthday.set(Calendar.MONTH, monthOfYear);
birthday.set(Calendar.DAY_OF_MONTH, dayOfMonth);
updateLabel();
}
};
new DatePickerDialog(this, date, birthday.get(Calendar.YEAR), birthday.get(Calendar.MONTH), birthday.get(Calendar.DAY_OF_MONTH)).show();
break;
}
}
void addPersonToGroupTable() {
}
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
switch(checkedId) {
case(R.id.rbMale):
gender = "M";
break;
case(R.id.rbFemale):
gender = "F";
break;
}
}
}
此代码显示没有错误，所以我虽然它可以正常工作。但非常不幸的是它停止显示以下信息。
android.database.sqlite.SQLiteException: near "Group": syntax error (code 1): , while compiling: CREATE TABLE Group ( Name TEXT NOT NULL, Age INT, Nationality TEXT NOT NULL, Gender CHAR(1) NOT NULL, Created_At TEXT);
现在我对数据库世界很陌生。它真的是查询的问题，还是有什么问题我还没注意到代码？
非常感谢您的帮助，如果您需要更多信息，请告诉我，我会尽快更新。
答案 0 :(得分：2)
您无法在表格创建代码中使用Group，因为GROUP是保留关键字
答案 1 :(得分：1)
使用前缀或后缀将表名更改为user_group。 Group是在SQLite中预定义的关键字，否则无法使用。