Android SQLiteConstraintException:notes.date不能为NULL(代码19)
我正在我的应用程序中创建一个notes功能,并使用了google notes教程。 它可以完美地工作,但在所有设备上,除了我得到Android SQLiteConstraintException:notes.date不能为NULL(代码19),android,sqlite,Android,Sqlite,我正在我的应用程序中创建一个notes功能,并使用了google notes教程。 它可以完美地工作,但在所有设备上,除了我得到sqliteconstraintextException:notes.date不能为NULL(代码19)的设备之外 这是日志: 10-29 16:01:39.392: E/SQLiteDatabase(7434): Error inserting body=testbody 10-29 16:01:39.392: E/SQLiteDatabase(7434): tit
sqliteconstraintextException:notes.date不能为NULL(代码19)
的设备之外
这是日志:
10-29 16:01:39.392: E/SQLiteDatabase(7434): Error inserting body=testbody
10-29 16:01:39.392: E/SQLiteDatabase(7434): title=testtitle
10-29 16:01:39.392: E/SQLiteDatabase(7434): android.database.sqlite.SQLiteConstraintException: notes.date may not be NULL (code 19)
10-29 16:01:39.392: E/SQLiteDatabase(7434): at android.database.sqlite.SQLiteConnection.nativeExecuteForLastInsertedRowId(Native Method)
10-29 16:01:39.392: E/SQLiteDatabase(7434): at android.database.sqlite.SQLiteConnection.executeForLastInsertedRowId(SQLiteConnection.java:779)
10-29 16:01:39.392: E/SQLiteDatabase(7434): at android.database.sqlite.SQLiteSession.executeForLastInsertedRowId(SQLiteSession.java:788)
10-29 16:01:39.392: E/SQLiteDatabase(7434): at android.database.sqlite.SQLiteStatement.executeInsert(SQLiteStatement.java:86)
10-29 16:01:39.392: E/SQLiteDatabase(7434): at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1469)
10-29 16:01:39.392: E/SQLiteDatabase(7434): at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1339)
10-29 16:01:39.392: E/SQLiteDatabase(7434): at com.fleank.skybuddy.NotesDbAdapter.createNote(NotesDbAdapter.java:125)
10-29 16:01:39.392: E/SQLiteDatabase(7434): at com.fleank.skybuddy.NoteEdit.saveState(NoteEdit.java:129)
10-29 16:01:39.392: E/SQLiteDatabase(7434): at com.fleank.skybuddy.NoteEdit.onPause(NoteEdit.java:102)
10-29 16:01:39.392: E/SQLiteDatabase(7434): at android.app.Activity.performPause(Activity.java:5224)
10-29 16:01:39.392: E/SQLiteDatabase(7434): at android.app.Instrumentation.callActivityOnPause(Instrumentation.java:1232)
10-29 16:01:39.392: E/SQLiteDatabase(7434): at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3197)
10-29 16:01:39.392: E/SQLiteDatabase(7434): at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3166)
10-29 16:01:39.392: E/SQLiteDatabase(7434): at android.app.ActivityThread.handlePauseActivity(ActivityThread.java:3144)
10-29 16:01:39.392: E/SQLiteDatabase(7434): at android.app.ActivityThread.access$800(ActivityThread.java:162)
10-29 16:01:39.392: E/SQLiteDatabase(7434): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1381)
10-29 16:01:39.392: E/SQLiteDatabase(7434): at android.os.Handler.dispatchMessage(Handler.java:107)
10-29 16:01:39.392: E/SQLiteDatabase(7434): at android.os.Looper.loop(Looper.java:194)
10-29 16:01:39.392: E/SQLiteDatabase(7434): at android.app.ActivityThread.main(ActivityThread.java:5371)
10-29 16:01:39.392: E/SQLiteDatabase(7434): at java.lang.reflect.Method.invokeNative(Native Method)
10-29 16:01:39.392: E/SQLiteDatabase(7434): at java.lang.reflect.Method.invoke(Method.java:525)
10-29 16:01:39.392: E/SQLiteDatabase(7434): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
10-29 16:01:39.392: E/SQLiteDatabase(7434): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
10-29 16:01:39.392: E/SQLiteDatabase(7434): at dalvik.system.NativeStart.main(Native Method)
奇怪的是,我没有定义任何日期值。正如你所看到的,我只有标题和正文。我是否缺少任何基本的SQL知识?
我必须承认,我完全被这个问题迷住了:-(
我的saveState()方法:
…以及NotesDBAdapter中的createNote()方法:
public long createNote(String title, String body) {
ContentValues initialValues = new ContentValues();
initialValues.put(KEY_TITLE, title);
initialValues.put(KEY_BODY, body);
return mDb.insert(DATABASE_TABLE, null, initialValues); //This is row 125
}
非常感谢您的帮助
更新:在创建时添加了完整的NotesDbAdapter(摘自google notes教程,并根据我的需要进行了微调):
该错误表明您的列“date”具有NOTNULL约束
由于数据库\u CREATE没有提到“date”,我只能假设它曾经提到过,然后您在不更新数据库\u版本的情况下对其进行了更改。尝试增加它,因为它应该调用onUpgrade,这将删除数据库,以允许您创建没有“date”列的新版本您的表有一个
date
列,其中不是null
由于您没有给列赋值,它默认为null。发布您的模式(创建表等等)@laalto请查看我的更新。您是否在未更新数据库版本
/删除旧数据库文件的情况下编辑了架构?@laalto您是对的!我似乎在这个特定设备上使用了旧版本。卸载并重新安装修复了此问题。感谢您的提示!您是对的,与laalto所写的相同。这是我愚蠢的错误我已经更改了DB,没有先卸载它,所以里面仍然有日期。谢谢你的提示,很抱歉我的愚蠢问题
public long createNote(String title, String body) {
ContentValues initialValues = new ContentValues();
initialValues.put(KEY_TITLE, title);
initialValues.put(KEY_BODY, body);
return mDb.insert(DATABASE_TABLE, null, initialValues); //This is row 125
}
public class NotesDbAdapter {
public static final String KEY_TITLE = "title";
public static final String KEY_BODY = "body";
public static final String KEY_ROWID = "_id";
private static final String TAG = "NotesDbAdapter";
private DatabaseHelper mDbHelper;
private SQLiteDatabase mDb;
/**
* Database creation sql statement
*/
private static final String DATABASE_CREATE =
"create table notes (_id integer primary key autoincrement, "
+ "title text not null, body text not null);";
private static final String DATABASE_NAME = "data";
private static final String DATABASE_TABLE = "notes";
private static final int DATABASE_VERSION = 2;
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 notes");
onCreate(db);
}
}
/**
* Constructor - takes the context to allow the database to be
* opened/created
*
* @param ctx the Context within which to work
*/
public NotesDbAdapter(Context ctx) {
this.mCtx = ctx;
}
/**
* Open the notes 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 NotesDbAdapter open() throws SQLException {
mDbHelper = new DatabaseHelper(mCtx);
mDb = mDbHelper.getWritableDatabase();
return this;
}
public void close() {
mDbHelper.close();
}
/**
* Create a new note using the title and body provided. If the note is
* successfully created return the new rowId for that note, otherwise return
* a -1 to indicate failure.
*
* @param title the title of the note
* @param body the body of the note
* @return rowId or -1 if failed
*/
public long createNote(String title, String body) {
ContentValues initialValues = new ContentValues();
initialValues.put(KEY_TITLE, title);
initialValues.put(KEY_BODY, body);
return mDb.insert(DATABASE_TABLE, null, initialValues);
}
/**
* Delete the note with the given rowId
*
* @param rowId id of note to delete
* @return true if deleted, false otherwise
*/
public boolean deleteNote(long rowId) {
return mDb.delete(DATABASE_TABLE, KEY_ROWID + "=" + rowId, null) > 0;
}
/**
* Return a Cursor over the list of all notes in the database
*
* @return Cursor over all notes
*/
public Cursor fetchAllNotes() {
return mDb.query(DATABASE_TABLE, new String[] {KEY_ROWID, KEY_TITLE,
KEY_BODY}, null, null, null, null, null);
}
/**
* Return a Cursor positioned at the note that matches the given rowId
*
* @param rowId id of note to retrieve
* @return Cursor positioned to matching note, if found
* @throws SQLException if note could not be found/retrieved
*/
public Cursor fetchNote(long rowId) throws SQLException {
Cursor mCursor =
mDb.query(true, DATABASE_TABLE, new String[] {KEY_ROWID,
KEY_TITLE, KEY_BODY}, KEY_ROWID + "=" + rowId, null,
null, null, null, null);
if (mCursor != null) {
mCursor.moveToFirst();
}
return mCursor;
}
/**
* Update the note using the details provided. The note to be updated is
* specified using the rowId, and it is altered to use the title and body
* values passed in
*
* @param rowId id of note to update
* @param title value to set note title to
* @param body value to set note body to
* @return true if the note was successfully updated, false otherwise
*/
public boolean updateNote(long rowId, String title, String body) {
ContentValues args = new ContentValues();
args.put(KEY_TITLE, title);
args.put(KEY_BODY, body);
return mDb.update(DATABASE_TABLE, args, KEY_ROWID + "=" + rowId, null) > 0;
}
}