我已经完成了创建虚拟主细节流程项目。
我尽可能多地尝试，但结果仍有错误。 请告诉我哪些类应该修改哪些内容，或者我应该如何编码？
LecturerEntity.java
public class LecturerEntity {
private String LecturerID;
private String LecturerName;
private String LecturerPosition;
private int LecturerPhoneNumber;
private String LecturerEmail;
private String LecturerRoomNumber;
public LecturerEntity(){
}
public LecturerEntity (String LecturerID, String LecturerName, String LecturerPosition, int LecturerPhoneNumber, String LecturerEmail, String LecturerRoomNumber) {
this.LecturerID = LecturerID;
this.LecturerName =LecturerName;
this.LecturerPosition = LecturerPosition;
this.LecturerPhoneNumber = LecturerPhoneNumber;
this.LecturerEmail = LecturerEmail;
this.LecturerRoomNumber = LecturerRoomNumber;
}
public String getLecturerID() {
return LecturerID;
}
public void setLecturerID(String LecturerID) {
this.LecturerID = LecturerID;
}
public String getLecturerName() {
return LecturerName;
}
public void setLecturerName(String LecturerName) {
this.LecturerName = LecturerName;
}
public int getLecturerPhoneNumber() {
return LecturerPhoneNumber;
}
public void setLecturerPhoneNumber(int LecturerPhoneNumber) {
this.LecturerPhoneNumber = LecturerPhoneNumber;
}
public String getLecturerEmail() {
return LecturerEmail;
}
public void setLecturerEmail(String LecturerEmail) {
this.LecturerEmail = LecturerEmail;
}
public String getLecturerRoomNumber() {
return LecturerRoomNumber;
}
public void setLecturerRoomNumber(String LecturerRoomNumber) {
this.LecturerRoomNumber = LecturerRoomNumber;
}
public String getLecturerPosition() {
return LecturerPosition;
}
public void setLecturerPosition(String LecturerPosition) {
this.LecturerPosition = LecturerPosition;
}
@Override
public String toString() {
return LecturerName;
}
}
LecturerController.java
package Controller;
public class LecturerController extends SQLiteOpenHelper {
private static final int DATABASE_VERSION = 1;
private static final String DATABASE_NAME = "LecturerStudentAppointment";
private static final String TABLE_LECTURER = "Lecturer";
private static final String LecturerID = "LecturerID";
private static final String LecturerName = "LecturerName";
private static final String LecturerPosition = "LecturerPosition";
private static final String LecturerPhoneNumber = "LecturerPhoneNumber";
private static final String LecturerEmail = "LecturerEmail";
private static final String LecturerRoomNumber = "LecturerRoomNumber" ;
public LecturerController(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
//CREATING TABLES
public void onCreate(SQLiteDatabase db) {
String CREATE_LECTURER_TABLE = "CREATE TABLE" + TABLE_LECTURER + "("
+ LecturerID + "INTEGER PRIMARY KEY,"
+ LecturerName + "TEXT,"
+ LecturerPosition + "TEXT,"
+ LecturerPhoneNumber + "INTEGER,"
+ LecturerEmail + "TEXT,"
+ LecturerRoomNumber + "TEXT" + ")";
}
//UPGRADING DATABASE
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// Drop older table if existed
db.execSQL("DROP TABLE IF EXISTS " + TABLE_LECTURER);
// Create tables again
onCreate(db);
}
/**
* All CRUD(Create, Read, Update, Delete) Operations
*/
//ADD LECTURER
void addLecturer(LecturerEntity LecturerEntity) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(LecturerID, LecturerEntity.getLecturerID()); // Contact Name
values.put(LecturerName, LecturerEntity.getLecturerName());
values.put(LecturerPosition, LecturerEntity.getLecturerPosition());
values.put(LecturerPhoneNumber, LecturerEntity.getLecturerPhoneNumber());
values.put(LecturerEmail, LecturerEntity.getLecturerEmail());
values.put(LecturerRoomNumber, LecturerEntity.getLecturerRoomNumber());
// Inserting Row
db.insert(TABLE_LECTURER, null, values);
db.close(); // Closing database connection
}
//GET ONE LECTURER
LecturerEntity getOneLecturer(int lecturerID) {
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.query(TABLE_LECTURER, new String[] { LecturerID,
LecturerName, LecturerPosition,LecturerPhoneNumber, LecturerEmail, LecturerRoomNumber}, LecturerID + "=?",
new String[] { String.valueOf(lecturerID) }, null, null, null, null);
if (cursor != null)
cursor.moveToFirst();
LecturerEntity LecturerEntity = new LecturerEntity(cursor.getString(0),
cursor.getString(1), cursor.getString(2), cursor.getInt(3), cursor.getString(4), cursor.getString(5));
// return contact
return LecturerEntity;
}
// Getting All data
public List<LecturerEntity> getAllLecturerEntity() {
List<LecturerEntity> lecturerList = new ArrayList<LecturerEntity>();
// Select All Query
String selectQuery = "SELECT * FROM " + TABLE_LECTURER;
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
// looping through all rows and adding to list
if (cursor.moveToFirst()) {
do {
LecturerEntity LecturerEntity = new LecturerEntity();
LecturerEntity.setLecturerID(cursor.getString(0));
LecturerEntity.setLecturerName(cursor.getString(1));
LecturerEntity.setLecturerPosition(cursor.getString(2));
LecturerEntity.setLecturerPhoneNumber(cursor.getInt(3));
LecturerEntity.setLecturerEmail(cursor.getString(4));
LecturerEntity.setLecturerRoomNumber(cursor.getString(5));
// Adding contact to list
lecturerList.add(LecturerEntity);
} while (cursor.moveToNext());
}
// return contact list
return lecturerList;
}
public int updateLecturer(LecturerEntity LecturerEntity) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(LecturerID, LecturerEntity.getLecturerID()); // Contact Name
values.put(LecturerName, LecturerEntity.getLecturerName());
values.put(LecturerPosition, LecturerEntity.getLecturerPosition());
values.put(LecturerPhoneNumber, LecturerEntity.getLecturerPhoneNumber());
values.put(LecturerEmail, LecturerEntity.getLecturerEmail());
values.put(LecturerRoomNumber, LecturerEntity.getLecturerRoomNumber());
// updating row
return db.update(TABLE_LECTURER, values, LecturerID + " = ?",
new String[] { String.valueOf(LecturerEntity.getLecturerID()) });
}
// Deleting single lecturer
public void deleteLecturer(LecturerEntity LecturerEntity) {
SQLiteDatabase db = this.getWritableDatabase();
db.delete(TABLE_LECTURER, LecturerID + " = ?",
new String[] { String.valueOf(LecturerEntity.getLecturerID()) });
db.close();
}
// Getting lecturer Count
public int getContactsCount() {
String countQuery = "SELECT * FROM " + TABLE_LECTURER;
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(countQuery, null);
cursor.close();
// return count
return cursor.getCount();
}
}
ItemListActivity.java
private boolean mTwoPane;
@Override
public void onItemSelected(String id) {
if (mTwoPane) {
// In two-pane mode, show the detail view in this activity by
// adding or replacing the detail fragment using a
// fragment transaction.
Bundle arguments = new Bundle();
arguments.putString(ItemDetailFragment.ARG_ITEM_ID, id);
ItemDetailFragment fragment = new ItemDetailFragment();
fragment.setArguments(arguments);
getSupportFragmentManager().beginTransaction()
.replace(R.id.item_detail_container, fragment)
.commit();
} else {
// In single-pane mode, simply start the detail activity
// for the selected item ID.
Intent detailIntent = new Intent(this, ItemDetailActivity.class);
detailIntent.putExtra(ItemDetailFragment.ARG_ITEM_ID, id);
startActivity(detailIntent);
}
}
ItemDetailActivity.java
public class ItemDetailActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_item_detail);
// Show the Up button in the action bar.
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
// savedInstanceState is non-null when there is fragment state
// saved from previous configurations of this activity
// (e.g. when rotating the screen from portrait to landscape).
// In this case, the fragment will automatically be re-added
// to its container so we don't need to manually add it.
// For more information, see the Fragments API guide at:
//
// http://developer.android.com/guide/components/fragments.html
//
if (savedInstanceState == null) {
// Create the detail fragment and add it to the activity
// using a fragment transaction.
Bundle arguments = new Bundle();
arguments.putString(ItemDetailFragment.ARG_ITEM_ID,
getIntent().getStringExtra(ItemDetailFragment.ARG_ITEM_ID));
ItemDetailFragment fragment = new ItemDetailFragment();
fragment.setArguments(arguments);
getSupportFragmentManager().beginTransaction()
.add(R.id.item_detail_container, fragment)
.commit();
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == android.R.id.home) {
// This ID represents the Home or Up button. In the case of this
// activity, the Up button is shown. Use NavUtils to allow users
// to navigate up one level in the application structure. For
// more details, see the Navigation pattern on Android Design:
//
// http://developer.android.com/design/patterns/navigation.html#up-vs-back
//
NavUtils.navigateUpTo(this, new Intent(this, ItemListActivity.class));
return true;
}
return super.onOptionsItemSelected(item);
}
}
ItemDetailFragment.java
public class ItemDetailFragment extends Fragment {
public ItemDetailFragment() {
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments().containsKey(ARG_ITEM_ID)) {
// Load the dummy content specified by the fragment
// arguments. In a real-world scenario, use a Loader
// to load content from a content provider.
mItem = DummyContent.ITEM_MAP.get(getArguments().getString(ARG_ITEM_ID));
mItem = ((ItemListApplication)getActivity().getApplication()).getItem(getArguments().getInt(
ARG_ITEM_ID));
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_item_detail, container, false);
// Show the dummy content as text in a TextView.
if (LecturerItem != null) {
((TextView) rootView.findViewById(R.id.item_detail)).setText(LecturerItem.getLecturerName());
}
return rootView;
}
}
ItemListFragment.java
public class ItemListFragment extends ListFragment {
private static final String STATE_ACTIVATED_POSITION = "activated_position";
private Callbacks mCallbacks = sDummyCallbacks;
private int mActivatedPosition = ListView.INVALID_POSITION;
public interface Callbacks {
public void onItemSelected(String id);
}
private static Callbacks sDummyCallbacks = new Callbacks() {
@Override
public void onItemSelected(String id) {
}
};
public ItemListFragment() {
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FragmentActivity activity = getActivity();
setListAdapter(((ItemListApplication)activity.getApplication()).getAdapter(activity));
// TODO: replace with a real list adapter.
/*setListAdapter(new ArrayAdapter<DummyContent.DummyItem>(
getActivity(),
android.R.layout.simple_list_item_activated_1,
android.R.id.text1,
DummyContent.ITEMS)); */
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
// Restore the previously serialized activated item position.
if (savedInstanceState != null
&& savedInstanceState.containsKey(STATE_ACTIVATED_POSITION)) {
setActivatedPosition(savedInstanceState.getInt(STATE_ACTIVATED_POSITION));
}
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
// Activities containing this fragment must implement its callbacks.
if (!(activity instanceof Callbacks)) {
throw new IllegalStateException("Activity must implement fragment's callbacks.");
}
mCallbacks = (Callbacks) activity;
}
@Override
public void onDetach() {
super.onDetach();
// Reset the active callbacks interface to the dummy implementation.
mCallbacks = sDummyCallbacks;
}
@Override
public void onListItemClick(ListView listView, View view, int position, long id) {
super.onListItemClick(listView, view, position, id);
// Notify the active callbacks interface (the activity, if the
// fragment is attached to one) that an item has been selected.
mCallbacks.onItemSelected(LecturerController.getAllLecturerEntity.getLecturerID());
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
if (mActivatedPosition != ListView.INVALID_POSITION) {
// Serialize and persist the activated item position.
outState.putInt(STATE_ACTIVATED_POSITION, mActivatedPosition);
}
}
public void setActivateOnItemClick(boolean activateOnItemClick) {
// When setting CHOICE_MODE_SINGLE, ListView will automatically
// give items the 'activated' state when touched.
getListView().setChoiceMode(activateOnItemClick
? ListView.CHOICE_MODE_SINGLE
: ListView.CHOICE_MODE_NONE);
}
private void setActivatedPosition(int position) {
if (position == ListView.INVALID_POSITION) {
getListView().setItemChecked(mActivatedPosition, false);
} else {
getListView().setItemChecked(position, true);
}
mActivatedPosition = position;
}
}
** @Michal Ciuba @Der Golem我刚刚插入了LecturerController.onCreate因为要在 ItemListFragment.java 中创建LecturerEntity的表，它应该在此更改吗？ onItemSelected（DummyContent.ITEMS.get（position）.id）和 ItemDetailFragment 应更改为此DummyContent.ITEM_MAP.get（getArguments（）。getString（ARG_ITEM_ID） ）; _ **