我在android上使用sqlite，并得到这个错误
02-11 18:05:37.224: E/SQLiteDatabase(26583): android.database.sqlite.SQLiteConstraintException: columns name, foreign_word are not unique (code 19)
但是，这是在调用onupgrade（）之后调用的，因此数据库本身应该没有任何内容。这是使用的SQL语句：
private static final String CREATE_DB_TB_2 = "CREATE TABLE "
+ TABLE_VOCAB_WORDS + "(" + COLUMN_NAME + " TEXT NOT NULL,"
+ COLUMN_WORD_FOREIGN + " TEXT NOT NULL," + COLUMN_WORD_ENGLISH
+ " TEXT NOT NULL," + COLUMN_CORRECT
+ " BYTE NOT NULL, PRIMARY KEY (" + COLUMN_NAME + ","
+ COLUMN_WORD_FOREIGN + "))";
由于在删除表时数据库中没有任何内容，为什么添加内容时会出现错误？？此外，每次运行应用程序时，我都调用context.deletedatabase（name）。这东西必须是唯一的，因为表是空的！
提前谢谢
完整日志：
02-11 18:38:02.811: E/SQLiteDatabase(28631): Error inserting correct=0 english_meaning= tener prisa foreign_word=to be in a hurry name=AQA GCSE Spanish Higher
02-11 18:38:02.811: E/SQLiteDatabase(28631): android.database.sqlite.SQLiteConstraintException: columns name, foreign_word are not unique (code 19)
02-11 18:38:02.811: E/SQLiteDatabase(28631): at android.database.sqlite.SQLiteConnection.nativeExecuteForLastInsertedRowId(Native Method)
02-11 18:38:02.811: E/SQLiteDatabase(28631): at android.database.sqlite.SQLiteConnection.executeForLastInsertedRowId(SQLiteConnection.java:775)
02-11 18:38:02.811: E/SQLiteDatabase(28631): at android.database.sqlite.SQLiteSession.executeForLastInsertedRowId(SQLiteSession.java:788)
02-11 18:38:02.811: E/SQLiteDatabase(28631): at android.database.sqlite.SQLiteStatement.executeInsert(SQLiteStatement.java:86)
02-11 18:38:02.811: E/SQLiteDatabase(28631): at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1525)
02-11 18:38:02.811: E/SQLiteDatabase(28631): at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1395)
02-11 18:38:02.811: E/SQLiteDatabase(28631): at com.sharma.gcsevocabtester.DatabaseManipulator.addWord(DatabaseManipulator.java:168)
02-11 18:38:02.811: E/SQLiteDatabase(28631): at com.sharma.gcsevocabtester.DatabaseManipulator$ImportVocabList.onPostExecute(DatabaseManipulator.java:420)
02-11 18:38:02.811: E/SQLiteDatabase(28631): at com.sharma.gcsevocabtester.DatabaseManipulator$ImportVocabList.onPostExecute(DatabaseManipulator.java:1)
02-11 18:38:02.811: E/SQLiteDatabase(28631): at android.os.AsyncTask.finish(AsyncTask.java:631)
02-11 18:38:02.811: E/SQLiteDatabase(28631): at android.os.AsyncTask.access$600(AsyncTask.java:177)
02-11 18:38:02.811: E/SQLiteDatabase(28631): at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644)
02-11 18:38:02.811: E/SQLiteDatabase(28631): at android.os.Handler.dispatchMessage(Handler.java:99)
02-11 18:38:02.811: E/SQLiteDatabase(28631): at android.os.Looper.loop(Looper.java:155)
02-11 18:38:02.811: E/SQLiteDatabase(28631): at android.app.ActivityThread.main(ActivityThread.java:5454)
02-11 18:38:02.811: E/SQLiteDatabase(28631): at java.lang.reflect.Method.invokeNative(Native Method)
02-11 18:38:02.811: E/SQLiteDatabase(28631): at java.lang.reflect.Method.invoke(Method.java:511)
02-11 18:38:02.811: E/SQLiteDatabase(28631): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1029)
02-11 18:38:02.811: E/SQLiteDatabase(28631): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:796)
02-11 18:38:02.811: E/SQLiteDatabase(28631): at dalvik.system.NativeStart.main(Native Method)
此外，我不确定这是否会有什么不同，但我也有另一个使用此字符串创建的表。
private static final String CREATE_DB_TB_1 = "CREATE TABLE "
+ TABLE_VOCAB_INFO + "(" + COLUMN_NAME
+ " TEXT NOT NULL PRIMARY KEY," + COLUMN_URL + " TEXT NOT NULL,"
+ COLUMN_DOWNLOADED + " TEXT NOT NULL)";
importvCanvablist是一个异步任务。这是onPostExecute：
**
* Method called after execution has happen, passing in the result
*
* @Override
*/
protected void onPostExecute(ArrayList<Word> result) {
super.onPostExecute(result);
progressDialog.dismiss();
boolean b = false;
open();
for (Word w : result) {
addWord(w, vlName);
}
if (getAllVocabListsWhere(DatabaseManipulator.COLUMN_DOWNLOADED,
"false").size() == 0) {
b = true;
}
close();
if (b) {
context.finish();
}
}
addword方法如下：
public boolean addWord(Word w, String name) {
try {
ContentValues cv = new ContentValues();
cv.put(COLUMN_NAME, name);
cv.put(COLUMN_WORD_FOREIGN, w.getWordForeign());
cv.put(COLUMN_WORD_ENGLISH, w.getWordEnglish());
cv.put(COLUMN_CORRECT, w.getCorrect());
database.insert(TABLE_VOCAB_WORDS, null, cv);
return true;
} catch (SQLiteException e) {
System.out.println("SQL ERROR");
return false;
}
}
问题已经解决-有重复的条目，但它们被忽略。谢谢
最佳答案
看看asynctask的onPostExecute()方法，我确信您在result中至少有一组重复的值。只需从源代码中清除这些重复项。
或者您可以tell your table忽略具有重复条目的行，并通过"conflict-clause"继续：
private static final String CREATE_DB_TB_2 = "CREATE TABLE "
+ TABLE_VOCAB_WORDS + "(" + COLUMN_NAME + " TEXT NOT NULL,"
+ COLUMN_WORD_FOREIGN + " TEXT NOT NULL," + COLUMN_WORD_ENGLISH
+ " TEXT NOT NULL," + COLUMN_CORRECT
+ " BYTE NOT NULL, PRIMARY KEY (" + COLUMN_NAME + ","
+ COLUMN_WORD_FOREIGN + ") ON CONFLICT IGNORE)";