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新しい列をに追加しようとしてSQLiteDatabaseいますが、新しい列でコードを実行しようとするたびにクラッシュします。新しい列を追加するだけで問題なく動作しますが、コードで使用しようとするとクラッシュします。問題の値はKEY_END_TIME、「end」という単語が含まれる任意の値です。とまったく同じ値を渡そうとしKEY_DATE_TIMEましたが、ほぼ同じコンテキストでそれらを使用して実行しようとしましたが、毎回すぐにクラッシュします。ヘルプやアドバイスをいただければ幸いです。

/**
 * Simple reminder database access helper class. 
 * Defines the basic CRUD operations (Create, Read, Update, Delete)
 * for the example, and gives the ability to list all reminders as well as
 * retrieve or modify a specific reminder.
 * 
 */
public class RemindersDbAdapter {

//
// Databsae Related Constants
//
private static final String DATABASE_NAME = "data";
private static final String DATABASE_TABLE = "reminders";
private static final int DATABASE_VERSION = 4;

public static final String KEY_TITLE = "title";
public static final String KEY_CUSTOMER = "body";
public static final String KEY_DATE_TIME = "reminder_date_time"; 
public static final String KEY_END_TIME = "reminder_end_time"; 
public static final String KEY_ROWID = "_id";


private static final String TAG = "ReminderDbAdapter";
private DatabaseHelper mDbHelper;
private SQLiteDatabase mDb;

/**
 * Database creation SQL statement
 */
private static final String DATABASE_CREATE =
        "create table " + DATABASE_TABLE + " ("
                + KEY_ROWID + " integer primary key autoincrement, "
                + KEY_TITLE + " text not null, " 
                + KEY_CUSTOMER + " text not null, " 
                + KEY_DATE_TIME + " text not null);"
                + KEY_END_TIME + " text not null);"; 



private final Context mCtx;

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) {
        Log.w(TAG, "Upgrading database from version " + oldVersion + " to "
                + newVersion + ", which will destroy all old data");

        db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE);
        onCreate(db);
    }
}

/**
 * Constructor - takes the context to allow the database to be
 * opened/created
 * 
 * @param ctx the Context within which to work
 */
public RemindersDbAdapter(Context ctx) {
    this.mCtx = ctx;
}

/**
 * Open the database. If it cannot be opened, try to create a new
 * instance of the database. If it cannot be created, throw an exception to
 * signal the failure
 * 
 * @return this (self reference, allowing this to be chained in an
 *         initialization call)
 * @throws SQLException if the database could be neither opened or created
 */
public RemindersDbAdapter open() throws SQLException {
    mDbHelper = new DatabaseHelper(mCtx);
    mDb = mDbHelper.getWritableDatabase();
    return this;
}

public void close() {
    mDbHelper.close();
}


/**
 * Create a new reminder using the title, body and reminder date time provided. 
 * If the reminder is  successfully created return the new rowId
 * for that reminder, otherwise return a -1 to indicate failure.
 * 
 * @param title the title of the reminder
 * @param body the body of the reminder
 * @param reminderDateTime the date and time the reminder should remind the user
 * @return rowId or -1 if failed
 */
public long createReminder(String title, String body, String reminderDateTime, String        reminderEndTime) {
    ContentValues initialValues = new ContentValues();
    initialValues.put(KEY_TITLE, title);
    initialValues.put(KEY_CUSTOMER, body);
    initialValues.put(KEY_DATE_TIME, reminderDateTime);
    initialValues.put(KEY_END_TIME, reminderDateTime); 

    return mDb.insert(DATABASE_TABLE, null, initialValues);
}

/**
 * Delete the reminder with the given rowId
 * 
 * @param rowId id of reminder to delete
 * @return true if deleted, false otherwise
 */
public boolean deleteReminder(long rowId) {

    return mDb.delete(DATABASE_TABLE, KEY_ROWID + "=" + rowId, null) > 0;
}

/**
 * Return a Cursor over the list of all reminders in the database
 * 
 * @return Cursor over all reminders
 */
public Cursor fetchAllReminders() {

    return mDb.query(DATABASE_TABLE, new String[] {KEY_ROWID, KEY_TITLE,
            KEY_CUSTOMER, KEY_DATE_TIME, KEY_END_TIME}, null, null, null, null, null);
}

/**
 * Return a Cursor positioned at the reminder that matches the given rowId
 * 
 * @param rowId id of reminder to retrieve
 * @return Cursor positioned to matching reminder, if found
 * @throws SQLException if reminder could not be found/retrieved
 */
public Cursor fetchReminder(long rowId) throws SQLException {

    Cursor mCursor =

            mDb.query(true, DATABASE_TABLE, new String[] {KEY_ROWID,
                    KEY_TITLE, KEY_CUSTOMER, KEY_DATE_TIME, KEY_END_TIME}, KEY_ROWID +     "=" + rowId, null,
                    null, null, null, null);
    if (mCursor != null) {
        mCursor.moveToFirst();
    }
    return mCursor;

}

/**
 * Update the reminder using the details provided. The reminder to be updated is
 * specified using the rowId, and it is altered to use the title, body and reminder     date time
 * values passed in
 * 
 * @param rowId id of reminder to update
 * @param title value to set reminder title to
 * @param body value to set reminder body to
 * @param reminderDateTime value to set the reminder time. 
 * @return true if the reminder was successfully updated, false otherwise
 */
public boolean updateReminder(long rowId, String title, String body, String reminderDateTime, String reminderEndTime) {
    ContentValues args = new ContentValues();
    args.put(KEY_TITLE, title);
    args.put(KEY_CUSTOMER, body);
    args.put(KEY_DATE_TIME, reminderDateTime);
    args.put(KEY_END_TIME, reminderEndTime);

    return mDb.update(DATABASE_TABLE, args, KEY_ROWID + "=" + rowId, null) > 0;
}

}

06-15 18:11:12.356: E/AndroidRuntime(790): FATAL EXCEPTION: main
06-15 18:11:12.356: E/AndroidRuntime(790): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.dummies.android.TaskReminder/com.dummies.android.TaskReminder.TaskReminderActivity}: android.database.sqlite.SQLiteException: no such column: reminder_end_time: , while compiling: SELECT _id, title, body, reminder_date_time, reminder_end_time FROM reminders
06-15 18:11:12.356: E/AndroidRuntime(790):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
06-15 18:11:12.356: E/AndroidRuntime(790):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
06-15 18:11:12.356: E/AndroidRuntime(790):  at android.app.ActivityThread.access$600(ActivityThread.java:123)
06-15 18:11:12.356: E/AndroidRuntime(790):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
06-15 18:11:12.356: E/AndroidRuntime(790):  at android.os.Handler.dispatchMessage(Handler.java:99)
06-15 18:11:12.356: E/AndroidRuntime(790):  at android.os.Looper.loop(Looper.java:137)
06-15 18:11:12.356: E/AndroidRuntime(790):  at android.app.ActivityThread.main(ActivityThread.java:4424)
06-15 18:11:12.356: E/AndroidRuntime(790):  at java.lang.reflect.Method.invokeNative(Native Method)
06-15 18:11:12.356: E/AndroidRuntime(790):  at java.lang.reflect.Method.invoke(Method.java:511)
06-15 18:11:12.356: E/AndroidRuntime(790):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
06-15 18:11:12.356: E/AndroidRuntime(790):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
06-15 18:11:12.356: E/AndroidRuntime(790):  at dalvik.system.NativeStart.main(Native Method)
06-15 18:11:12.356: E/AndroidRuntime(790): Caused by: android.database.sqlite.SQLiteException: no such column: reminder_end_time: , while compiling: SELECT _id, title, body, reminder_date_time, reminder_end_time FROM reminders
06-15 18:11:12.356: E/AndroidRuntime(790):  at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method)
06-15 18:11:12.356: E/AndroidRuntime(790):  at android.database.sqlite.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:68)
06-15 18:11:12.356: E/AndroidRuntime(790):  at android.database.sqlite.SQLiteProgram.compileSql(SQLiteProgram.java:143)
06-15 18:11:12.356: E/AndroidRuntime(790):  at android.database.sqlite.SQLiteProgram.compileAndbindAllArgs(SQLiteProgram.java:361)
06-15 18:11:12.356: E/AndroidRuntime(790):  at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:127)
06-15 18:11:12.356: E/AndroidRuntime(790):  at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:94)
06-15 18:11:12.356: E/AndroidRuntime(790):  at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:53)
06-15 18:11:12.356: E/AndroidRuntime(790):  at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:47)
06-15 18:11:12.356: E/AndroidRuntime(790):  at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1564)
06-15 18:11:12.356: E/AndroidRuntime(790):  at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1449)
06-15 18:11:12.356: E/AndroidRuntime(790):  at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1405)
06-15 18:11:12.356: E/AndroidRuntime(790):  at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1485)
06-15 18:11:12.356: E/AndroidRuntime(790):  at com.dummies.android.TaskReminder.RemindersDbAdapter.fetchAllReminders(RemindersDbAdapter.java:144)
06-15 18:11:12.356: E/AndroidRuntime(790):  at com.dummies.android.TaskReminder.TaskReminderActivity.fillData(TaskReminderActivity.java:40)
06-15 18:11:12.356: E/AndroidRuntime(790):  at com.dummies.android.TaskReminder.TaskReminderActivity.onCreate(TaskReminderActivity.java:33)
06-15 18:11:12.356: E/AndroidRuntime(790):  at android.app.Activity.performCreate(Activity.java:4465)
06-15 18:11:12.356: E/AndroidRuntime(790):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
06-15 18:11:12.356: E/AndroidRuntime(790):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
4

3 に答える 3

1

createステートメントの形式が正しくありません。

 + KEY_DATE_TIME + " text not null);"
            + KEY_END_TIME + " text not null);";

終わりがあります"）;" 2回なので、KEY_END_TIMEを追加する行はcreateステートメントの外にあり、実行されません。

于 2012-06-15T18:41:43.723 に答える
1

SQL作成文字列が間違っています。次のように変更します。

...+ KEY_DATE_TIME + " text not null, "
                + KEY_END_TIME + " text not null);";

アプリをアンインストールしてから再インストールすることを忘れないでください。そうすれば、onCreateメソッドが再度呼び出され、データベースが再作成されます。

于 2012-06-15T18:41:57.017 に答える
1

私は問題だと思います

"create table " + DATABASE_TABLE + " ("
        + KEY_ROWID + " integer primary key autoincrement, "
        + KEY_TITLE + " text not null, " 
        + KEY_CUSTOMER + " text not null, " 
        + KEY_DATE_TIME + " text not null);"
        + KEY_END_TIME + " text not null);";

"）;" 2回取得

于 2012-06-15T18:39:58.253 に答える