我正在使用数据库帮助程序类为我的应用程序创建数据库，然后我尝试在另一个类中插入数据。但是我收到了一个错误。
我在Logcat中收到以下错误，不知道如何解决它？ ：
07-15 16:20:30.348: E/SQLiteDatabase(16270): Error inserting score=0 date=1405437630327 name=ry
07-15 16:20:30.348: E/SQLiteDatabase(16270): android.database.sqlite.SQLiteConstraintException: column name is not unique (code 19)
07-15 16:20:30.348: E/SQLiteDatabase(16270): at android.database.sqlite.SQLiteConnection.nativeExecuteForLastInsertedRowId(Native Method)
07-15 16:20:30.348: E/SQLiteDatabase(16270): at android.database.sqlite.SQLiteConnection.executeForLastInsertedRowId(SQLiteConnection.java:976)
07-15 16:20:30.348: E/SQLiteDatabase(16270): at android.database.sqlite.SQLiteSession.executeForLastInsertedRowId(SQLiteSession.java:788)
07-15 16:20:30.348: E/SQLiteDatabase(16270): at android.database.sqlite.SQLiteStatement.executeInsert(SQLiteStatement.java:86)
07-15 16:20:30.348: E/SQLiteDatabase(16270): at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1591)
07-15 16:20:30.348: E/SQLiteDatabase(16270): at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1461)
07-15 16:20:30.348: E/SQLiteDatabase(16270): at com.example.multapply.DatabaseHelper.addScore(DatabaseHelper.java:84)
07-15 16:20:30.348: E/SQLiteDatabase(16270): at com.example.multapply.RandomTest.onClick(RandomTest.java:161)
07-15 16:20:30.348: E/SQLiteDatabase(16270): at android.view.View.performClick(View.java:4633)
07-15 16:20:30.348: E/SQLiteDatabase(16270): at android.view.View$PerformClick.run(View.java:19330)
07-15 16:20:30.348: E/SQLiteDatabase(16270): at android.os.Handler.handleCallback(Handler.java:733)
07-15 16:20:30.348: E/SQLiteDatabase(16270): at android.os.Handler.dispatchMessage(Handler.java:95)
07-15 16:20:30.348: E/SQLiteDatabase(16270): at android.os.Looper.loop(Looper.java:157)
07-15 16:20:30.348: E/SQLiteDatabase(16270): at android.app.ActivityThread.main(ActivityThread.java:5356)
07-15 16:20:30.348: E/SQLiteDatabase(16270): at java.lang.reflect.Method.invokeNative(Native Method)
07-15 16:20:30.348: E/SQLiteDatabase(16270): at java.lang.reflect.Method.invoke(Method.java:515)
07-15 16:20:30.348: E/SQLiteDatabase(16270): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
07-15 16:20:30.348: E/SQLiteDatabase(16270): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
07-15 16:20:30.348: E/SQLiteDatabase(16270): at dalvik.system.NativeStart.main(Native Method)
相关代码：
数据库助手类：
package com.example.multapply;
import java.util.ArrayList;
import java.util.List;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;
public class DatabaseHelper extends SQLiteOpenHelper {
// Database Version
private static final int DATABASE_VERSION = 3;
// Database Name
private final static String DATABASE_NAME = "MultapplyDatabase";
// Contacts table name
private static final String TABLE_SCORE = "scores";
// Contacts Table Columns names
private static final String COL_NAME = "name";
private static final String COL_SCORE = "score";
private static final String COL_DATE = "date";
/**
* Constructor
* @param context
*/
public DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
/**
* Method that creates the database
*/
@Override
public void onCreate(SQLiteDatabase db) {
//NOTE: may need to alter the below to take out everything after INTEGER
String CREATE_TABLE_SCORE = "CREATE TABLE " + TABLE_SCORE + "("
+ COL_NAME + " STRING PRIMARY KEY," + COL_SCORE + " INTEGER," + COL_DATE + " LONG" + ")";
db.execSQL(CREATE_TABLE_SCORE);
}
/**
* Method that upgrades the database
*/
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// Drop older table if existed
db.execSQL("DROP TABLE IF EXISTS " + TABLE_SCORE);
// Create tables again
onCreate(db);
}
/**
* All CRUD operations
*/
// Adding new score details (Name, score, date)
void addScore(Score score) {
SQLiteDatabase db = this.getWritableDatabase();
//ContentValues- holds the values.
ContentValues values = new ContentValues();
values.put(COL_NAME, score.getName());
values.put(COL_SCORE, score.getScore());
values.put(COL_DATE, score.getDate());
// Inserting Row (i.e. the values that were entered from above
db.insert(TABLE_SCORE, null, values);
db.close(); // Closing database connection
}
/**
* Method will return a single Name and score
* @param id
* @return
*/
// Getting single contact
Score getScore(String name) {
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.query(TABLE_SCORE, new String[] { COL_NAME,
COL_SCORE, COL_DATE}, COL_NAME + "=?",
new String[] { String.valueOf(name) }, null, null, null, null);
if (cursor != null)
cursor.moveToFirst();
Score score = new Score(cursor.getString(0),Integer.parseInt(cursor.getString(1)),cursor.getLong(2));
// return contact
return score;
}
/**
* Method will return a list of all the scores
* @return
*/
// Getting All Contacts
public List<Score> getAllScores() {
List<Score> scoreList = new ArrayList<Score>();
// Select All Query
String selectQuery = "SELECT * FROM " + TABLE_SCORE;
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
// looping through all rows and adding to list
if (cursor.moveToFirst()) {
do {
Score score = new Score();
score.setName(cursor.getString(0));
score.setScore(Integer.parseInt(cursor.getString(1)));
score.setDate(cursor.getLong(2));
// Adding contact to list
scoreList.add(score);
} while (cursor.moveToNext());
}
// return contact list
return scoreList;
}
}
与将数据输入数据库相关的代码：
/**
* CRUD Operations
* */
// Inserting Contacts
Log.d("Insert: ", "Inserting ..");
db.addScore(new Score(UserName.getUserName(), score, System
.currentTimeMillis()));
// Reading all contacts
Log.d("Reading: ", "Reading all contacts..");
List<Score> scores = db.getAllScores();
for (Score s : scores) {
String log = "Name: " + s.getName() + " ,Score: "
+ s.getScore() + "Date: " + s.getDate();
// Writing Contacts to log
Log.d("Details: ", log);
}
}
}
答案 0 :(得分：3)
这意味着您正在尝试使用已在数据库中保存或使用的“名称”列中的参数，因为“name”是主键
答案 1 :(得分：0)
您违反了UNIQUE约束，因为您的列名称是主键。这是SQLiteConstraintException的原因。