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데이터베이스를 만들려고하지만 작동하지 않습니다 (앱을 강제 중지해야 함). 내가 로그 고양이를 확인하려고하면 오류가 "투영에서 알 수없는 열"이며 MyToDoContentProvider.java를 확인하는 것이 좋습니다. 내 SQLite 문으로 MyToDoContentProvider.java를 이미 검사 할 것이지만 무엇이 잘못되었는지는 모른다. 누구든지 나를 도울 수 있습니까? TQ .. 투영 중 알 수없는 열이 SQLite에 나타납니다
이
내 MyToDoContentProvider.javapackage com.date.contentprovider;
import java.util.Arrays;
import java.util.HashSet;
import android.content.ContentProvider;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.UriMatcher;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteQueryBuilder;
import android.net.Uri;
import android.text.TextUtils;
import com.date.database.FirstClass;
import com.date.database.TodoDatabaseHelper;
public class MyTodoContentProvider extends ContentProvider {
// database
private TodoDatabaseHelper database;
// Used for the UriMacher
private static final int TODOS = 10;
private static final int TODO_ID = 20;
private static final String AUTHORITY = "com.date.contentprovider";
private static final String BASE_PATH = "todos";
public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY
+ "/" + BASE_PATH);
public static final String CONTENT_TYPE = ContentResolver.CURSOR_DIR_BASE_TYPE
+ "/todos";
public static final String CONTENT_ITEM_TYPE = ContentResolver.CURSOR_ITEM_BASE_TYPE
+ "/todo";
private static final UriMatcher sURIMatcher = new UriMatcher(UriMatcher.NO_MATCH);
static {
sURIMatcher.addURI(AUTHORITY, BASE_PATH, TODOS);
sURIMatcher.addURI(AUTHORITY, BASE_PATH + "/#", TODO_ID);
}
@Override
public boolean onCreate() {
database = new TodoDatabaseHelper(getContext());
return false;
}
@Override
public Cursor query(Uri uri, String[] projection, String selection,
String[] selectionArgs, String sortOrder) {
// Uisng SQLiteQueryBuilder instead of query() method
SQLiteQueryBuilder queryBuilder = new SQLiteQueryBuilder();
// Check if the caller has requested a column which does not exists
checkColumns(projection);
// Set the table
queryBuilder.setTables(FirstClass.TABLE_TODO);
int uriType = sURIMatcher.match(uri);
switch (uriType) {
case TODOS:
break;
case TODO_ID:
// Adding the ID to the original query
queryBuilder.appendWhere(FirstClass.COLUMN_ID + "="
+ uri.getLastPathSegment());
break;
default:
throw new IllegalArgumentException("Unknown URI: " + uri);
}
SQLiteDatabase db = database.getWritableDatabase();
Cursor cursor = queryBuilder.query(db, projection, selection,
selectionArgs, null, null, sortOrder);
// Make sure that potential listeners are getting notified
cursor.setNotificationUri(getContext().getContentResolver(), uri);
return cursor;
}
@Override
public String getType(Uri uri) {
return null;
}
@Override
public Uri insert(Uri uri, ContentValues values) {
int uriType = sURIMatcher.match(uri);
SQLiteDatabase sqlDB = database.getWritableDatabase();
int rowsDeleted = 0;
long id = 0;
switch (uriType) {
case TODOS:
id = sqlDB.insert(FirstClass.TABLE_TODO, null, values);
break;
default:
throw new IllegalArgumentException("Unknown URI: " + uri);
}
getContext().getContentResolver().notifyChange(uri, null);
return Uri.parse(BASE_PATH + "/" + id);
}
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
int uriType = sURIMatcher.match(uri);
SQLiteDatabase sqlDB = database.getWritableDatabase();
int rowsDeleted = 0;
switch (uriType) {
case TODOS:
rowsDeleted = sqlDB.delete(FirstClass.TABLE_TODO, selection,
selectionArgs);
break;
case TODO_ID:
String id = uri.getLastPathSegment();
if (TextUtils.isEmpty(selection)) {
rowsDeleted = sqlDB.delete(FirstClass.TABLE_TODO,
FirstClass.COLUMN_ID + "=" + id,
null);
} else {
rowsDeleted = sqlDB.delete(FirstClass.TABLE_TODO,
FirstClass.COLUMN_ID + "=" + id
+ " and " + selection,
selectionArgs);
}
break;
default:
throw new IllegalArgumentException("Unknown URI: " + uri);
}
getContext().getContentResolver().notifyChange(uri, null);
return rowsDeleted;
}
@Override
public int update(Uri uri, ContentValues values, String selection,
String[] selectionArgs) {
int uriType = sURIMatcher.match(uri);
SQLiteDatabase sqlDB = database.getWritableDatabase();
int rowsUpdated = 0;
switch (uriType) {
case TODOS:
rowsUpdated = sqlDB.update(FirstClass.TABLE_TODO,
values,
selection,
selectionArgs);
break;
case TODO_ID:
String id = uri.getLastPathSegment();
if (TextUtils.isEmpty(selection)) {
rowsUpdated = sqlDB.update(FirstClass.TABLE_TODO,
values,
FirstClass.COLUMN_ID + "=" + id,
null);
} else {
rowsUpdated = sqlDB.update(FirstClass.TABLE_TODO,
values,
FirstClass.COLUMN_ID + "=" + id
+ " and "
+ selection,
selectionArgs);
}
break;
default:
throw new IllegalArgumentException("Unknown URI: " + uri);
}
getContext().getContentResolver().notifyChange(uri, null);
return rowsUpdated;
}
private void checkColumns(String[] projection) {
String[] available = { FirstClass.COLUMN_NAME,
FirstClass.COLUMN_DESCRIPTION, FirstClass.COLUMN_CATEGORY, FirstClass.COLUMN_TRIGGER,
FirstClass.COLUMN_MON, FirstClass.COLUMN_TUE, FirstClass.COLUMN_WED, FirstClass.COLUMN_THU,
FirstClass.COLUMN_FRI, FirstClass.COLUMN_SAT, FirstClass.COLUMN_SUN, FirstClass.COLUMN_DATE,
FirstClass.COLUMN_TIME, FirstClass.COLUMN_LATITUDE, FirstClass.COLUMN_LONGITUDE,
FirstClass.COLUMN_STATUS };
if (projection != null) {
HashSet<String> requestedColumns = new HashSet<String>(Arrays.asList(projection));
HashSet<String> availableColumns = new HashSet<String>(Arrays.asList(available));
// Check if all columns which are requested are available
if (!availableColumns.containsAll(requestedColumns)) {
throw new IllegalArgumentException("Unknown columns in projection");
}
}
}
}
이며,이 내 FirstClass.java
package com.date.database;
import android.database.sqlite.SQLiteDatabase;
import android.util.Log;
public class FirstClass {
// Database table
public static final String TABLE_TODO = "todo";
public static final String COLUMN_ID = "_id";
public static final String COLUMN_CATEGORY = "category";
public static final String COLUMN_NAME = "name";
public static final String COLUMN_DESCRIPTION = "description";
public static final String COLUMN_TRIGGER ="trigger";
public static final String COLUMN_MON = "mon";
public static final String COLUMN_TUE = "tue";
public static final String COLUMN_WED = "wed";
public static final String COLUMN_THU = "thu";
public static final String COLUMN_FRI ="fri";
public static final String COLUMN_SAT = "sat";
public static final String COLUMN_SUN = "sun";
public static final String COLUMN_DATE = "date";
public static final String COLUMN_TIME = "time";
public static final String COLUMN_LATITUDE ="latitude";
public static final String COLUMN_LONGITUDE= "longitude";
public static final String COLUMN_STATUS = "status";
// Database creation SQL statement
private static final String DATABASE_CREATE = "create table "
+ TABLE_TODO
+ "("
+ COLUMN_ID + " integer primary key autoincrement, "
+ COLUMN_CATEGORY + " text not null, "
+ COLUMN_NAME + " text not null,"
+ COLUMN_DESCRIPTION + " text not null,"
+ COLUMN_TRIGGER + " text not null ,"//'t', "
+ COLUMN_MON + " integer not null , "// == 1,"
+ COLUMN_TUE + " integer not null , "//== 2,"
+ COLUMN_WED + " integer not null , "// == 3,"
+ COLUMN_THU + " integer not null , "// == 4,"
+ COLUMN_FRI + " integer not null , "// == 5,"
+ COLUMN_SAT + " integer not null , "// == 6,"
+ COLUMN_SUN + " integer not null , "// == 0,"
+ COLUMN_DATE + " date not null,"
+ COLUMN_TIME + " time not null,"
+ COLUMN_LATITUDE + " decimal not null , "// ==0.00000000,"
+ COLUMN_LONGITUDE + " decimal not null , "// ==0.00000000,"
+ COLUMN_STATUS + " text not null "// 'act' "
+ ");";
public static void onCreate(SQLiteDatabase database) {
database.execSQL(DATABASE_CREATE);
}
public static void onUpgrade(SQLiteDatabase database, int oldVersion,
int newVersion) {
Log.w(FirstClass.class.getName(), "Upgrading database from version "
+ oldVersion + " to " + newVersion
+ ", which will destroy all old data");
database.execSQL("DROP TABLE IF EXISTS " + TABLE_TODO);
// database.execSQL("INSERT INTO "+TABLE_TODO+" VALUES (null, datetime()) ");
onCreate(database);
}
}
이있다
package com.date.database;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class TodoDatabaseHelper extends SQLiteOpenHelper {
private static final String DATABASE_NAME = "todotable.db";
private static final int DATABASE_VERSION = 1;
final int oldVersion =1;
final int newVersion =1;
public TodoDatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
// Method is called during creation of the database
@Override
public void onCreate(SQLiteDatabase database) {
FirstClass.onCreate(database);
}
// Method is called during an upgrade of the database,
// e.g. if you increase the database version
@Override
public void onUpgrade(SQLiteDatabase database, int oldVersion,
int newVersion) {
FirstClass.onUpgrade(database, oldVersion, newVersion);
}
}
내가 묻는 모든 열은 이미 테이블에 선언되어 있습니다. 왜 내가 매우 혼란 스럽습니다. – user1858863
ToDoDatabaseHelper에 대한 코드를 추가 할 수 있습니까? –
이미 추가했습니다. 위에서 추가를 볼 수 있습니다 .. – user1858863