1月7日至3日:52:08.037: ERROR/AndroidRuntime(627): 了java.lang.RuntimeException:無法 開始活動 ComponentInfo {com.fttech.books /com.fttech.books.viewBooks}: android.database.sqlite.SQLiteException: 沒有這樣的列:作者:,而 編譯:選擇預訂,作者,ISBN 評級從收集我不斷收到錯誤的SQLException這個
CODE:
public class booksDbAdapter {
private static final String DATABASE_NAME = " data";
private static final String DATABASE_TABLE = "collection";
private static final int DATABASE_VERSION = 1;
public static final String KEY_BOOK = "book";
public static final String KEY_AUTHOR = "author";
public static final String KEY_ISBN = "isbn";
public static final String KEY_RATING = "rating";
public static final String KEY_ROWID = "_id";
private DatabaseHelper mDbHelper;
private SQLiteDatabase mDb;
private static final String DATABASE_CREATE =
" create table " + DATABASE_TABLE + " ("
+ KEY_ROWID + " integer primary key autoincrement, "
+ KEY_AUTHOR + " text not null, "
+ KEY_BOOK + " text not null, "
+ KEY_ISBN + " text not null, "
+ KEY_RATING + " text not null);";
private final Context mCtx;
public booksDbAdapter (Context ctx){
this.mCtx = ctx;
}
private static class DatabaseHelper extends SQLiteOpenHelper{
DatabaseHelper(Context context){
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL(DATABASE_CREATE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
}
}
public booksDbAdapter open() throws SQLException{
mDbHelper = new DatabaseHelper(mCtx);
mDb = mDbHelper.getWritableDatabase();
return this;
}
public void close(){
mDbHelper.close();
}
public long createBook(String book, String author, String isbn, String rating){
ContentValues initialValues = new ContentValues();
initialValues.put(KEY_BOOK, book);
initialValues.put(KEY_AUTHOR, author);
initialValues.put(KEY_ISBN, isbn);
initialValues.put(KEY_RATING, rating);
return mDb.insert(DATABASE_TABLE, null, initialValues);
}
public boolean deleteBook(long rowId){
return mDb.delete(DATABASE_TABLE, KEY_ROWID + "=" + rowId, null) > 0;
}
public Cursor fetchAllBooks(){
return mDb.query(DATABASE_TABLE, new String[]{KEY_BOOK, KEY_AUTHOR, KEY_ISBN, KEY_RATING}, null, null, null, null, null);
}
public Cursor fetchBook(long rowId) throws SQLException{
Cursor mCursor =
mDb.query(DATABASE_TABLE, new String[]{KEY_BOOK, KEY_AUTHOR, KEY_ISBN, KEY_RATING}, KEY_ROWID + "=" +
rowId, null, null, null, null);
if(mCursor != null){
mCursor.moveToFirst();
}
return mCursor;
}
public boolean updateBook(long rowId, String book, String author, String isbn, String rating){
ContentValues args = new ContentValues();
args.put(KEY_BOOK, book);
args.put(KEY_AUTHOR, author);
args.put(KEY_ISBN, isbn);
args.put(KEY_RATING, rating);
return mDb.update(DATABASE_TABLE, args, KEY_ROWID + "=" + rowId, null)> 0;
}
}
「沒有這樣的列:作者」 - 是很具體 –
我知道!我只是無法找到我在哪裏搞亂!我現在一直在尋找一個小時..你看到它了嗎? –
我告訴它創建列,你可以在代碼中看到...所以我沒有得到什麼問題。 –