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因此，我試圖構建一個應用程序，用戶創建一個事件並將事件存儲到數據庫中。但每次我點擊保存按鈕，應用程序崩潰。我嘗試了很多事情來試圖破譯這個問題，但我一直在失敗。 下面是該SQLiteOpenHelper當我嘗試將數據插入數據庫時，應用程序崩潰
public class AccessDatabase extends SQLiteOpenHelper {
// Declaring the variables
private static final String DB_NAME = "unilog";
private static final int DB_VERSION = 2;
private static final String TB_NOTES = "Notes";
private static final String NOTE_NAME = "name";
private static final String NOTE_DATE = "date";
private static final String NOTE_LOCATION = "location";
private static final String NOTE_DESCRIPTION = "description";
private static final String NOTE_STATUS = "status";
private static final String NOTE_CREATION = "createdby";
private static final String CREATE_NOTES_TABLE = "CREATE TABLE " + TB_NOTES + " ("
+ " num INTEGER PRIMARY KEY AUTOINCREMENT, " + NOTE_NAME + " TEXT,"
+ NOTE_DATE + " TEXT," + NOTE_LOCATION + " TEXT," + NOTE_DESCRIPTION + " TEXT," + NOTE_CREATION + " TEXT," + NOTE_STATUS + " INTEGER)";
private static final String CREATE_USER_TABLE = "CREATE TABLE USERS ("
+ "id INTEGER PRIMARY KEY AUTOINCREMENT, "
+ "NAME TEXT NOT NULL, "
+ "PASSWORD TEXT NOT NULL, "
+ "EMAIL TEXT NOT NULL) ";
//Done Declaring the variables
AccessDatabase(Context context) {
super(context, DB_NAME, null, DB_VERSION);
}
private static void insertUser(SQLiteDatabase db, String name, String password, String email) {
ContentValues user = new ContentValues();
user.put("NAME", name);
user.put("PASSWORD", password);
user.put("EMAIL", email);
db.insert("USERS", null, user);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL(CREATE_NOTES_TABLE);
db.execSQL(CREATE_USER_TABLE);
insertUser(db, "Yosr", "123456789", "yosrgouddi[email protected]");
insertUser(db, "Yesmine", "nadalind", "[email protected]");
ContentValues io = new ContentValues();
io.put(NOTE_NAME, "Yosr");
io.put(NOTE_DATE, "121212");
io.put(NOTE_LOCATION, "Unilog");
io.put(NOTE_DESCRIPTION, "Android");
io.put(NOTE_CREATION, "By me");
io.put(NOTE_STATUS, 0);
db.insert(TB_NOTES, null, io);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS " + TB_NOTES);
db.execSQL("DROP TABLE IF EXISTS USERS");
onCreate(db);
}
//TOdo add note
public void addNote(Notes note) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(NOTE_NAME, note.getName());
values.put(NOTE_DATE, note.getEventDate());
values.put(NOTE_LOCATION, note.getEventLocation());
values.put(NOTE_DESCRIPTION, note.getEventDescription());
values.put(NOTE_CREATION, note.getCreatedBy());
values.put(NOTE_STATUS, note.getStatus());
//todo insert row
db.insert(TB_NOTES, null, values);
db.close();
}
//TODO : GETTING A SINGLE NOTE
public Notes getNote(String name, String date) {
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.query(TB_NOTES, new String[]{NOTE_NAME, NOTE_DATE, NOTE_LOCATION, NOTE_DESCRIPTION, NOTE_CREATION, NOTE_STATUS},
NOTE_NAME + " =? AND " + NOTE_DATE + " =?", new String[]{name, date}, null, null, null, null);
if (cursor != null)
cursor.moveToFirst();
Notes note = new Notes(cursor.getString(0), cursor.getString(1), cursor.getString(2), cursor.getString(3), cursor.getString(4), cursor.getInt(5));
cursor.close();
return note;
}
//TODO : GETTING ALL NOTES
public List<Notes> getallnotes() {
List<Notes> notesList = new ArrayList<Notes>();
String SelectQuery = "SELECT * FROM " + TB_NOTES;
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(SelectQuery, null);
if (cursor.moveToFirst()) {
do {
Notes note = new Notes();
note.setName(cursor.getString(1));
note.setEventDate(cursor.getString(2));
note.setDescription(cursor.getString(4));
note.setEventLocation(cursor.getString(3));
note.setCreatedBy(cursor.getString(5));
notesList.add(note);
} while (cursor.moveToNext());
}
cursor.close();
return notesList;
}
//TODO delete note
public void DeleteNote(Notes notes)
{
SQLiteDatabase db = this.getWritableDatabase();
db.delete(TB_NOTES, "(" + NOTE_NAME + " = ? AND " + NOTE_DATE + "= ?)",
new String[]{notes.getName(), notes.getEventDate()});
db.close();
}
//Get number of notes
public int getNotesCount() {
String countQuery = "SELECT * FROM " + TB_NOTES;
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery("select * from Notes", null);
cursor.close();
// return count
return cursor.getCount();
}
} 代碼和這裏的note.java
public class Notes {
private int status;
private String Name, EventDate,EventLocation,EventDescription , createdBy;
public Notes()
{}
public Notes (String name, int status)
{
this.Name = name;
this.status = status;
}
public Notes(String name,String EventDate, String EventLocation, String Description, String createdby, int status) {
this.createdBy = createdby;
this.EventDescription= Description;
this.EventLocation= EventLocation;
this.EventDate=EventDate;
this.Name = name;
this.status = status;
}
// setters
//TODO NAME
public void setName(String name) {
this.Name = name;
}
//TODO DESCRIPTION
public void setDescription (String description) {
this.EventDescription = description;
}
//TODO LOCATION
public void setEventLocation (String location)
{
this.EventLocation = location;
}
//TODO STATUS
public void setStatus(int status) {
this.status = status;
}
//TODO EVENTDATE
public void setEventDate(String date)
{this.EventDate = date;}
//TODO CREATEDBY
public void setCreatedBy(String createdby){
this.createdBy = createdby;
}
// getters
//TODO NAME
public String getName() {
return this.Name;
}
//TODO STATUS
public int getStatus() {
return this.status;
}
//TODO CREATEDBY
public String getCreatedBy() {
return createdBy;
}
//TODO EVENTDATE
public java.lang.String getEventDate() {
return EventDate;
}
//TODO EVENTLOCATION
public java.lang.String getEventLocation() {
return EventLocation;
}
public String getEventDescription() {
return EventDescription;
}
}
代碼，最後createnote.java
public class CreateNote extends Activity {
//TODO Declaring Variables
String name;
TextView enddate, startdate, datetext;
Button display, SaveEvent, CancelEvent;
ImageButton StartDate, EndDate, datebutton;
EditText eventlocation, eventdescription, newnote;
Calendar mycalendar1 = Calendar.getInstance();
Calendar mycalendar2 = Calendar.getInstance();
Calendar mytime = Calendar.getInstance();
AccessDatabase db = new AccessDatabase(this);
//TODO Done declaring variables
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.create_note);
//TODO:EditText : location & description
eventlocation = (EditText) findViewById(R.id.location);
eventdescription = (EditText) findViewById(R.id.description);
String location = eventlocation.getText().toString();
String description = eventdescription.getText().toString();
eventlocation.setText(location, TextView.BufferType.EDITABLE);
eventdescription.setText(description, TextView.BufferType.EDITABLE);
newnote = (EditText)findViewById(R.id.newnote);
name = newnote.getText().toString();
//TODO save and cancel buttons
SaveEvent = (Button)findViewById(R.id.savenote);
CancelEvent = (Button)findViewById(R.id.cancelnote);
SaveEvent.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
// String msg = db.getNote("Yosr", "121212").getCreatedBy();
int non = db.getNotesCount();
StringBuilder stro = new StringBuilder();
stro.append(non);
String nin = stro.toString();
Toast.makeText(getApplicationContext(), nin, Toast.LENGTH_LONG).show();
}
});
//TODO :Buttons : start & end & date
datebutton = (ImageButton) findViewById(R.id.datebutton);
StartDate = (ImageButton) findViewById(R.id.dpresultday);
EndDate = (ImageButton) findViewById(R.id.dpendtime);
//TODO TextView : startdate and enddate
datetext = (TextView) findViewById(R.id.date);
startdate = (TextView) findViewById(R.id.startdate);
enddate = (TextView) findViewById(R.id.enddate);
//TODO Calendar and datepicker stuff for start
final DatePickerDialog.OnDateSetListener date = new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year, int month, int day) {
mytime.set(Calendar.YEAR, year);
mytime.set(Calendar.MONTH, month);
mytime.set(Calendar.DAY_OF_MONTH, day);
updatelabel2();
}
};
//TODO Startdate button listener
StartDate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int hour = mycalendar1.get(Calendar.HOUR_OF_DAY);
int minute = mycalendar2.get(Calendar.MINUTE);
TimePickerDialog mtimepicker;
mtimepicker = new TimePickerDialog(CreateNote.this, new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker timePicker, int selectedhour, int selectedminute) {
startdate.setText(selectedhour + ":" + selectedminute);
}
}, hour, minute, true);
mtimepicker.setTitle("selecttime");
mtimepicker.show();
}
});
//TODO TimePicker listener for startButton
datebutton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
new DatePickerDialog(CreateNote.this, date, mycalendar1
.get(Calendar.YEAR), mytime.get(Calendar.MONTH),
mytime.get(Calendar.DAY_OF_MONTH)).show();
}
});
//TODO Enddate button listener
EndDate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int hour = mycalendar2.get(Calendar.HOUR_OF_DAY);
int minute = mycalendar2.get(Calendar.MINUTE);
TimePickerDialog mtimepicker;
mtimepicker = new TimePickerDialog(CreateNote.this, new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker timePicker, int selectedhour, int selectedminute) {
enddate.setText(selectedhour + ":" + selectedminute);
}
}, hour, minute, true);
mtimepicker.setTitle("selecttime");
mtimepicker.show();
}
});
}
private void updatelabel2(){
String myFormat = "MM/dd/yy"; //In which you need put here
SimpleDateFormat sdf = new SimpleDateFormat(myFormat, Locale.US);
datetext.setText(sdf.format(mytime.getTime()));
} }
添加日誌貓錯誤 –
我們需要看到你的代碼.... – Razgriz
我們想回答這個問題，但首先我們想出來的虛構的世界，分享你的代碼和堆棧跟蹤！ – Naveen