Я использую AndroidAnnotations и SQLite с ORMLite и пытаюсь запустить базу данных. Несколько дней назад я смог создать таблицу и сделать тестовую вставку объекта Contact. Тем не менее, я сделал некоторые изменения, а затем прекратил работать - к сожалению, я не смог отменить свои изменения, и теперь я застрял и больше не могу работать.Получение NullPointerException с AndroidAnnotations и ORMLite
Всякий раз, когда я запустить приложение я получаю эту ошибку:
02-12 23:09:39.931 11766-11766/net.gazeapp E/AndroidRuntime: FATAL EXCEPTION: main
Process: net.gazeapp, PID: 11766
java.lang.RuntimeException: Unable to start activity ComponentInfo{net.gazeapp/net.gazeapp.MainActivity_}: java.lang.NullPointerException: Attempt to invoke virtual method 'int net.gazeapp.data.ContactDao.create(java.lang.Object)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int net.gazeapp.data.ContactDao.create(java.lang.Object)' on a null object reference
at net.gazeapp.service.ContactService.addContact(ContactService.java:55)
at net.gazeapp.MainActivity.testNewORM(MainActivity.java:171)
at net.gazeapp.MainActivity.createView(MainActivity.java:148)
at net.gazeapp.MainActivity_.onViewChanged(MainActivity_.java:111)
at org.androidannotations.api.view.OnViewChangedNotifier.notifyViewChanged(OnViewChangedNotifier.java:41)
at net.gazeapp.MainActivity_.setContentView(MainActivity_.java:57)
at net.gazeapp.MainActivity_.onCreate(MainActivity_.java:45)
at android.app.Activity.performCreate(Activity.java:6251)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Так вот мой MainActivity, в котором я делаю ORM-тестирование (в методе testNewORM()):
@EActivity(R.layout.activity_main_viewpagertab)
@OptionsMenu(R.menu.menu_main)
public class MainActivity extends BaseActivity implements ObservableScrollViewCallbacks {
private final String TAG = getClass().getSimpleName();
private int mBaseTranslationY;
private NavigationAdapter mPagerAdapter;
private Contact mContact;
private static String[] tabTitles = null;
@App
GazeApplication application;
@ViewById(R.id.header)
View mHeaderView;
@ViewById(R.id.toolbar)
View mToolbarView;
@ViewById(R.id.pager)
ViewPager mPager;
@ViewById(R.id.fab)
FloatingActionButton fab;
@ViewById(R.id.adview)
MoPubView mAdView;
@Bean
ContactService contactService;
@AfterViews
void createView() {
setSupportActionBar((Toolbar) findViewById(R.id.toolbar));
Tools.readJsonFile(this, "fetishes.json");
// TAB TITLES: RECENT, ALL, MY MEDIA
tabTitles = new String[]{getString(R.string.recent), getString(R.string.all), getString(R.string.my_media)};
ViewCompat.setElevation(mHeaderView, getResources().getDimension(R.dimen.toolbar_elevation));
mPagerAdapter = new NavigationAdapter(getSupportFragmentManager());
mPager.setAdapter(mPagerAdapter);
SlidingTabLayout slidingTabLayout = (SlidingTabLayout) findViewById(R.id.sliding_tabs);
slidingTabLayout.setCustomTabView(R.layout.tab_indicator, android.R.id.text1);
slidingTabLayout.setSelectedIndicatorColors(getResources().getColor(R.color.colorAccent));
slidingTabLayout.setDistributeEvenly(true);
slidingTabLayout.setViewPager(mPager);
// When the page is selected, other fragments' scrollY should be adjusted
// according to the toolbar status(shown/hidden)
slidingTabLayout.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int i, float v, int i2) {
}
@Override
public void onPageSelected(int i) {
propagateToolbarState(toolbarIsShown());
}
@Override
public void onPageScrollStateChanged(int i) {
}
});
propagateToolbarState(toolbarIsShown());
displayAdBanner();
// TESTING ORMAPPER
// TESTING ORMAPPER
testNewORM();
}
void testNewORM() {
java.util.Date date = new java.util.Date();
Timestamp timeNow = new Timestamp(date.getTime());
Timestamp birthdateTimestamp = new Timestamp(date.getTime());
Date birthdate = new Date();
try {
DateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy");
birthdate = dateFormat.parse("04/07/1980");
long time = birthdate.getTime();
birthdateTimestamp = new Timestamp(time);
} catch (ParseException e) {
e.printStackTrace();
}
Contact contact = new Contact("Dominik Erbsland");
contact.setBirthdate(birthdate);
try {
mContact = contactService.addContact(contact);
} catch (ItemNotFoundException | SQLException e) {
Log.e(TAG, e.getLocalizedMessage());
e.printStackTrace();
}
}
...
}
И здесь другие используемые классы:
@EBean(scope = EBean.Scope.Singleton)
public class ContactService {
private static final String TAG = ContactService.class.getSimpleName();
@RootContext
Context ctx;
@OrmLiteDao(helper = DatabaseHelper.class)
ContactDao mContactDao;
public Contact getContact(int contactId) throws ItemNotFoundException, SQLException {
Contact contact = mContactDao.queryForId(contactId);
if (contact == null) {
Log.e(TAG, "Contact not found in database");
throw new ItemNotFoundException();
}
return contact;
}
public List<Contact> getContacts() throws ItemNotFoundException, SQLException {
List<Contact> contact = mContactDao.queryForAll();
if (contact == null) {
Log.e(TAG, "Contacts not found in database");
throw new ItemNotFoundException();
}
return contact;
}
public Contact addContact(Contact contact) throws SQLException {
int rowsAffected = 0;
try {
rowsAffected = mContactDao.create(contact);
} catch (SQLException e) {
Log.e(TAG, e.getLocalizedMessage());
e.printStackTrace();
}
Log.d(TAG, "New Contact ID: " + contact.getId());
return contact;
}
public void testOutput() {
Log.d(TAG, "THIS IS A TEST OUTPUT");
}
}
здесь моя база данных помощник:
public class DatabaseHelper extends OrmLiteSqliteOpenHelper {
private static final String DATABASE_NAME = "Gaze.db";
private static final int DATABASE_VERSION = 1;
private final Context context;
// the DAO object we use to access the Person table
private Dao<Contact, Integer> contactDao = null;
private Dao<MyPreferences, Integer> preferencesDao = null;
private Dao<SecurityQuestion, Integer> securityQuestionDao = null;
public DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
this.context = context;
}
/**
* This is called when the database is first created. Usually you should call createTable statements here to create
* the tables that will store your data.
*/
@Override
public void onCreate(SQLiteDatabase db, ConnectionSource connectionSource) {
try {
Log.i(DatabaseHelper.class.getName(), "onCreate");
TableUtils.createTable(connectionSource, Contact.class);
} catch (SQLException e) {
Log.e(DatabaseHelper.class.getName(), "Can't create database", e);
throw new RuntimeException(e);
}
}
/**
* This is called when your application is upgraded and it has a higher version number. This allows you to adjust
* the various data to match the new version number.
*/
@Override
public void onUpgrade(SQLiteDatabase db, ConnectionSource connectionSource, int oldVersion, int newVersion) {
try {
Log.i(DatabaseHelper.class.getName(), "onUpgrade");
TableUtils.dropTable(connectionSource, Contact.class, true);
// after we drop the old databases, we create the new ones
onCreate(db, connectionSource);
} catch (SQLException e) {
Log.e(DatabaseHelper.class.getName(), "Can't drop databases", e);
throw new RuntimeException(e);
}
}
/**
* Returns the Database Access Object (DAO) for our Person class. It will create it or just give the cached
* value.
*/
public Dao<Contact, Integer> getContactDao() throws SQLException {
if (contactDao == null) {
contactDao = getDao(Contact.class);
}
return contactDao;
}
public Dao<MyPreferences, Integer> getPreferencesDao() throws SQLException {
if (preferencesDao == null) {
preferencesDao = getDao(MyPreferences.class);
}
return preferencesDao;
}
public Dao<SecurityQuestion, Integer> getSecurityQuestionDao() throws SQLException {
if (securityQuestionDao == null) {
securityQuestionDao = getDao(SecurityQuestion.class);
}
return securityQuestionDao;
}
/**
* Close the database connections and clear any cached DAOs.
*/
@Override
public void close() {
super.close();
contactDao = null;
preferencesDao = null;
securityQuestionDao = null;
}
}
и класс данных:
@DatabaseTable(tableName = "Contact", daoClass = ContactDao.class)
public class Contact implements Serializable {
@DatabaseField(generatedId = true, columnName = PersistentObject.ID)
int id;
@DatabaseField(index = true)
String contactName;
@DatabaseField
String mainPic;
@DatabaseField(dataType = DataType.DATE_STRING, format = "yyyy-MM-dd HH:mm:ss.S")
Date birthdate;
@DatabaseField
boolean knowPersonally;
@DatabaseField(dataType = DataType.DATE_STRING, format = "yyyy-MM-dd HH:mm:ss.S")
Timestamp created;
@DatabaseField(dataType = DataType.DATE_STRING, format = "yyyy-MM-dd HH:mm:ss.S")
Timestamp lastMod;
public Contact() {
// needed by ormlite
}
...
}
и ContactDAO:
public class ContactDao extends BaseDaoImpl<Contact, Integer> {
public ContactDao(Class<Contact> dataClass) throws SQLException {
super(dataClass);
}
public ContactDao(ConnectionSource connectionSource, Class<Contact> dataClass) throws SQLException {
super(connectionSource, dataClass);
}
public ContactDao(ConnectionSource connectionSource, DatabaseTableConfig<Contact> tableConfig) throws SQLException {
super(connectionSource, tableConfig);
}
public List<Contact> getContacts() throws SQLException {
return queryForAll();
}
}
Таким образом, в классе ContactService в "mContactDao.create (контакт);" он разбился с Исключением. Это та часть, которую я не понимаю, потому что ContactService аннотируется с помощью @EBean и к ней обращаются в MainActivity с помощью «@Bean ContactService contactService;» и не должно быть там ...
Спасибо за любую помощь или подсказки заранее.
Можете ли вы поделиться проектом или сокращенным проектом? – WonderCsabo
Да, конечно. Я сократил проект до базовых классов. Вот ссылка для скачивания: http://www.cheat-database.com/Gaze-reduced.zip - Спасибо большое! –
'mContactDao' никогда не инициализируется. – Flovdis