每次单击按钮向表中添加项目时，应用程序崩溃，我都会收到此错误，logcat：
11-30 21:46:00.822 13943-13943/com.example.user.timetable_test E/SQLiteLog: (1) near "TABLESunday": syntax error
11-30 21:46:00.827 13943-13943/com.example.user.timetable_test D/AndroidRuntime: Shutting down VM
11-30 21:46:00.827 13943-13943/com.example.user.timetable_test E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.user.timetable_test, PID: 13943
android.database.sqlite.SQLiteException: near "TABLESunday": syntax error (code 1): , while compiling: CREATE TABLESunday(_session INTEGER PRIMARY KEY AUTOINCREMENT,_name TEXT,_length INTEGER);
#################################################################
Error Code : 1 (SQLITE_ERROR)
Caused By : SQL(query) error or missing database.
(near "TABLESunday": syntax error (code 1): , while compiling: CREATE TABLESunday(_session INTEGER PRIMARY KEY AUTOINCREMENT,_name TEXT,_length INTEGER);)
#################################################################
at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:1058)
at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:623)
at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:59)
at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1812)
at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1743)
at com.example.user.timetable_test.setup.TableDBHandler.onCreate(TableDBHandler.java:43)
at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:251)
at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:163)
at com.example.user.timetable_test.setup.TableDBHandler.addEntry(TableDBHandler.java:63)
at com.example.user.timetable_test.setup.SetTable$PlaceholderFragment$1.onClick(SetTable.java:206)
at android.view.View.performClick(View.java:5697)
at android.widget.TextView.performClick(TextView.java:10826)
at android.view.View$PerformClick.run(View.java:22526)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:7225)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
SQLitDatabase类：
package com.example.user.timetable_test.setup;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import com.example.user.timetable_test.MiscData;
public class TableDBHandler extends SQLiteOpenHelper{
private MiscData data = MiscData.getInstance();
private static int DATABASE_VERSION = 1;
private static String DATABASE_NAME = "Timetable.db";
private static String[] TABLE_DAY = new String[MiscData.getInstance().getDays()];
private static String COLUMN_SESSION_NUM = "_session";
private static String COLUMN_NAME = "_name";
private static String COLUMN_LENGTH = "_length";
public TableDBHandler(Context context, SQLiteDatabase.CursorFactory factory){
super(context, DATABASE_NAME, factory, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase sqLiteDatabase){
for(int i = 0; i < data.getDays(); i++){
TABLE_DAY[i] = data.getDay(i + data.getFirstDay());
}
for(int i = 0; i < data.getDays(); i++){
String query = "CREATE TABLE" + TABLE_DAY[i] + "(" + COLUMN_SESSION_NUM +
" INTEGER PRIMARY KEY AUTOINCREMENT " + COLUMN_NAME + " TEXT " +
COLUMN_LENGTH + " INTEGER " + ");";
sqLiteDatabase.execSQL(query);
}
}
@Override
public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1){
sqLiteDatabase.execSQL("DROP TABLE EXISTS" + TABLE_DAY);
onCreate(sqLiteDatabase);
}
public void addEntry(int day, String name, int length){
ContentValues values = new ContentValues();
values.put(COLUMN_NAME, name);
values.put(COLUMN_LENGTH, length);
SQLiteDatabase db = getWritableDatabase();
db.insert(TABLE_DAY[day], null, values);
db.close();
}
//get Session length
public int getSessionLength(int day, int session){
int length;
SQLiteDatabase db = getReadableDatabase();
String query =
"SELECT" + COLUMN_LENGTH + "FROM" + TABLE_DAY[day] + "WHERE" + COLUMN_SESSION_NUM +
"=\"" + session + "\";";
Cursor c = db.rawQuery(query, null);
length = c.getInt(c.getColumnIndex(COLUMN_LENGTH));
return length;
}
//get Session name
public String getSessionName(int day, int session){
String name;
SQLiteDatabase db = getReadableDatabase();
String query = "SELECT" + COLUMN_NAME + "FROM" + TABLE_DAY[day] +
"WHERE" + COLUMN_SESSION_NUM + "=\"" + session + "=\";";
Cursor c = db.rawQuery(query, null);
name = c.getString(c.getColumnIndex(COLUMN_NAME));
return name;
}
}
在这段代码中，我尝试在运行时创建一个初始化的表数组，这可能是错误来自的地方，或者我可能正在努力。
我添加条目的地方：
tableDBHandler.addEntry(page , sessionSpinners[i].toString(), Integer.parseInt(lengthText[i].getText().toString()));
我尝试将COLUMN_LENGTH的数据类型从TEXT更改为INTEGER，但这并不起作用。
任何想法如何解决这个问题？
答案 0 :(得分：4)
错误发生在表"TABLESunday": syntax error的创建中。 sql代码的语法上缺少空格。试试这个：
String query = "CREATE TABLE " + TABLE_DAY[i] + "(" + COLUMN_SESSION_NUM +
" INTEGER PRIMARY KEY AUTOINCREMENT " + COLUMN_NAME + " TEXT " +
COLUMN_LENGTH + " INTEGER " + ");";
答案 1 :(得分：0)
在我的情况下，“列名”和“值”的数量不匹配。 例如
insert INTO cars (car_id,Name) values (v1,v2,v3);
列数是2，值是3；
答案 2 :(得分：0)
就我而言，我使用SQLite更新表的名称。 仅此而已！
答案 3 :(得分：0)
我是笨蛋还是我的错，以上给出的解决方案都不适合我，我在 External Storage 上创建数据库并且应用程序没有 android.permission.WRITE_EXTERNAL_STORAGE 权限，通过授予权限解决，谢谢