Android 准备';时0x39c298上出现故障1(靠近“表”:语法错误);创建表格(
我正在尝试使用200名学生的数据库执行一个应用程序,但我不知道创建数据库时出现了什么问题。请帮助。另外,如果有人能告诉我如何仅初始化两列,并让其余列保持空,这也会很有帮助Android 准备';时0x39c298上出现故障1(靠近“表”:语法错误);创建表格(,android,mysql,eclipse,Android,Mysql,Eclipse,我正在尝试使用200名学生的数据库执行一个应用程序,但我不知道创建数据库时出现了什么问题。请帮助。另外,如果有人能告诉我如何仅初始化两列,并让其余列保持空,这也会很有帮助 public class Work { public static final String KEY_NAME = "name"; public static final String KEY_REG = "reg"; public static final String KEY_QUIZ1 = "q1"; public s
public class Work {
public static final String KEY_NAME = "name";
public static final String KEY_REG = "reg";
public static final String KEY_QUIZ1 = "q1";
public static final String KEY_QUIZ2 = "q2";
public static final String KEY_QUIZ3 = "q3";
public static final String KEY_CAT1 = "c1";
public static final String KEY_CAT2 = "c2";
public static final String KEY_TEE = "t";
private DbHelper ourHelper;
private final Context ourContext;
private SQLiteDatabase ourDatabase;
private static final String DATABASE_NAME = "data";
private static final String DATABASE_TABLE = "table";
private static final int DATABASE_VERSION = 1;
private static class DbHelper extends SQLiteOpenHelper{
public DbHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
// TODO Auto-generated constructor stub
}
@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
db.execSQL("CREATE TABLE " + DATABASE_TABLE + " (" +
KEY_REG + " TEXT, " +
KEY_NAME + " TEXT, " +
KEY_QUIZ1 + " TEXT, " +
KEY_QUIZ2 + " TEXT, " +
KEY_QUIZ3 + " TEXT, " +
KEY_CAT1 + " TEXT, " +
KEY_CAT2 + " TEXT, " +
KEY_TEE + " TEXT);"
);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
db.execSQL("DROP TBALE IF EXIISTS " + DATABASE_TABLE);
onCreate(db);
}
}
public Work(Context c){
ourContext = c;
}
public Work open() throws SQLException{
ourHelper = new DbHelper(ourContext);
ourDatabase = ourHelper.getWritableDatabase();
return this;
}
public void close(){
ourHelper.close();
}
public long createEntry(String string, String string2) {
// TODO Auto-generated method stub
ContentValues cv = new ContentValues();
cv.put(KEY_REG, string);
cv.put(KEY_NAME, string2);
/* cv.put(KEY_QUIZ1, string3);
cv.put(KEY_QUIZ2, string4);
cv.put(KEY_QUIZ3, string5);
cv.put(KEY_CAT1, string6);
cv.put(KEY_CAT2, string7);
cv.put(KEY_TEE, string8);*/
return ourDatabase.insert(DATABASE_TABLE, null, cv);
}
}
有人能帮我找到错误吗?我对SQL很陌生,对它的方式有点冷淡
这是我用来在一个SQLDatabase中创建200个条目的代码
case R.id.bres:
int i;
boolean did=true;
try{
Work e = new Work(this);
e.open();
for(i=0;i<200;i++)
{
e.createEntry(reg2[i],na[i],"0","0","0","0","0","0");
}
e.close();
}
catch(Exception e){
did=false;
Dialog d = new Dialog(this);
d.setTitle("Failed");
TextView tv= new TextView(this);
tv.setText("Error");
d.setContentView(tv);
d.show();
}
finally{
did=true;
}
这是SQL数据库类的工作
public class Work {
public static final String KEY_NAME = "name";
public static final String KEY_REG = "reg";
public static final String KEY_QUIZ1 = "q1";
public static final String KEY_QUIZ2 = "q2";
public static final String KEY_QUIZ3 = "q3";
public static final String KEY_CAT1 = "c1";
public static final String KEY_CAT2 = "c2";
public static final String KEY_TEE = "t";
private DbHelper ourHelper;
private final Context ourContext;
private SQLiteDatabase ourDatabase;
private static final String DATABASE_NAME = "data";
private static final String DATABASE_TABLE = "stable";
private static final int DATABASE_VERSION = 1;
private static class DbHelper extends SQLiteOpenHelper{
public DbHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
// TODO Auto-generated constructor stub
}
@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
db.execSQL("CREATE TABLE " + DATABASE_TABLE + " (" +
KEY_REG + " TEXT, " +
KEY_NAME + " TEXT, " +
KEY_QUIZ1 + " TEXT, " +
KEY_QUIZ2 + " TEXT, " +
KEY_QUIZ3 + " TEXT, " +
KEY_CAT1 + " TEXT, " +
KEY_CAT2 + " TEXT, " +
KEY_TEE + " TEXT);"
);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
db.execSQL("DROP TBALE IF EXISTS " + DATABASE_TABLE);
onCreate(db);
}
}
public Work(Context c){
ourContext = c;
}
public Work open() throws SQLException{
ourHelper = new DbHelper(ourContext);
ourDatabase = ourHelper.getWritableDatabase();
return this;
}
public void close(){
ourHelper.close();
}
public long createEntry(String string, String string2, String string3, String string4, String string5, String string6, String string7, String string8) {
// TODO Auto-generated method stub
ContentValues cv = new ContentValues();
cv.put(KEY_REG, string);
cv.put(KEY_NAME, string2);
cv.put(KEY_QUIZ1, string3);
cv.put(KEY_QUIZ2, string4);
cv.put(KEY_QUIZ3, string5);
cv.put(KEY_CAT1, string6);
cv.put(KEY_CAT2, string7);
cv.put(KEY_TEE, string8);
return ourDatabase.insert(DATABASE_TABLE, null, cv);
}
public String getq1(int j) {
// TODO Auto-generated method stub
int i=0;
String[] columns = new String[]{KEY_REG, KEY_NAME, KEY_QUIZ1, KEY_QUIZ2, KEY_QUIZ3, KEY_CAT1, KEY_CAT2, KEY_TEE};
Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null, null, null);
String res = "";
int iQ1=c.getColumnIndex(KEY_QUIZ1);
for(c.moveToFirst();i<j;i++,c.moveToNext())
{}
res = c.getString(iQ1);
return res;
}
public String getq2(int j) {
// TODO Auto-generated method stub
int i=0;
String[] columns = new String[]{KEY_REG, KEY_NAME, KEY_QUIZ1, KEY_QUIZ2, KEY_QUIZ3, KEY_CAT1, KEY_CAT2, KEY_TEE};
Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null, null, null);
String res = "";
int iQ1=c.getColumnIndex(KEY_QUIZ2);
for(c.moveToFirst();i<j;i++,c.moveToNext())
{}
res = c.getString(iQ1);
return null;
}
public String getq3(int j) {
// TODO Auto-generated method stub
int i=0;
String[] columns = new String[]{KEY_REG, KEY_NAME, KEY_QUIZ1, KEY_QUIZ2, KEY_QUIZ3, KEY_CAT1, KEY_CAT2, KEY_TEE};
Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null, null, null);
String res = "";
int iQ1=c.getColumnIndex(KEY_QUIZ3);
for(c.moveToFirst();i<j;i++,c.moveToNext())
{}
res = c.getString(iQ1);
return null;
}
public String getc1(int j) {
// TODO Auto-generated method stub
int i=0;
String[] columns = new String[]{ KEY_REG, KEY_NAME, KEY_QUIZ1, KEY_QUIZ2, KEY_QUIZ3, KEY_CAT1, KEY_CAT2, KEY_TEE};
Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null, null, null);
String res = "";
int iQ1=c.getColumnIndex(KEY_CAT1);
for(c.moveToFirst();i<j;i++,c.moveToNext())
{}
res = c.getString(iQ1);
return null;
}
public String getc2(int j) {
// TODO Auto-generated method stub
int i=0;
String[] columns = new String[]{ KEY_REG, KEY_NAME, KEY_QUIZ1, KEY_QUIZ2, KEY_QUIZ3, KEY_CAT1, KEY_CAT2, KEY_TEE};
Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null, null, null);
String res = "";
int iQ1=c.getColumnIndex(KEY_CAT2);
for(c.moveToFirst();i<j;i++,c.moveToNext())
{}
res = c.getString(iQ1);
return null;
}
public String gette(int j) {
// TODO Auto-generated method stub
int i=0;
String[] columns = new String[]{KEY_REG, KEY_NAME, KEY_QUIZ1, KEY_QUIZ2, KEY_QUIZ3, KEY_CAT1, KEY_CAT2, KEY_TEE};
Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null, null, null);
String res = "";
int iQ1=c.getColumnIndex(KEY_TEE);
for(c.moveToFirst();i<j;i++,c.moveToNext())
{}
res = c.getString(iQ1);
return null;
}
}
公共课堂作业{
公共静态最终字符串键\u NAME=“NAME”;
公共静态最终字符串键\u REG=“REG”;
公共静态最终字符串键_QUIZ1=“q1”;
公共静态最终字符串键_QUIZ2=“q2”;
公共静态最终字符串键_QUIZ3=“q3”;
公共静态最终字符串键\u CAT1=“c1”;
公共静态最终字符串键_CAT2=“c2”;
公共静态最终字符串键\u TEE=“t”;
私人助理;
私人最终语境;
私有SQLITE数据库;
私有静态最终字符串数据库\u NAME=“data”;
私有静态最终字符串数据库\u TABLE=“stable”;
私有静态最终int数据库_VERSION=1;
私有静态类DbHelper扩展了SQLiteOpenHelper{
公共DbHelper(上下文){
super(上下文、数据库名称、null、数据库版本);
//TODO自动生成的构造函数存根
}
@凌驾
public void onCreate(SQLiteDatabase db){
//TODO自动生成的方法存根
db.execSQL(“创建表”+数据库表+”(“+
按键_REG+“文本,”+
按键名称+“文本,”+
按键_QUIZ1+“文本,”+
按键2+“文本,”+
按键3+“文本,”+
按键\u CAT1+“文本,”+
按键_CAT2+“文本,”+
按键_TEE+“文本);”
);
}
@凌驾
public void onUpgrade(SQLiteDatabase db,int-oldVersion,int-newVersion){
//TODO自动生成的方法存根
db.execSQL(“如果存在,则删除TBALE”+数据库表);
onCreate(db);
}
}
公共工作(背景c){
ourContext=c;
}
public Work open()引发SQLException{
ourHelper=newdbhelper(ourContext);
ourDatabase=ourHelper.getWritableDatabase();
归还这个;
}
公众假期结束(){
ourHelper.close();
}
公共长createEntry(字符串、字符串2、字符串3、字符串4、字符串5、字符串6、字符串7、字符串8){
//TODO自动生成的方法存根
ContentValues cv=新的ContentValues();
cv.put(按键注册,字符串);
cv.put(图例名称,string2);
cv.put(图例1,第3列);
cv.put(键2、键4);
cv.put(键3,键5);
cv.put(第1类、第6类键);
cv.put(第2类、第7类键);
等速推杆(关键三通,第8条);
返回ourDatabase.insert(DATABASE_TABLE,null,cv);
}
公共字符串getq1(int j){
//TODO自动生成的方法存根
int i=0;
String[]columns=新字符串[]{KEY_REG,KEY_NAME,KEY_QUIZ1,KEY_QUIZ2,KEY_QUIZ3,KEY_CAT1,KEY_CAT2,KEY_TEE};
游标c=ourDatabase.query(数据库表,列,null,null,null,null,null);
字符串res=“”;
int iQ1=c.getColumnIndex(键_QUIZ1);
对于(c.moveToFirst();i您不能使用表格创建表格
也可以看到这篇文章
也会改变
db.execSQL("DROP TBALE IF EXIISTS " + DATABASE_TABLE);
到
table
是关键字table
是保留字:或使用`转义关键字db.execSQL(“创建表”+数据库表+”`(“
。但不建议这样做。不要将任何已解析的单词用作有帮助的表名。谢谢。还有其他问题。@VirenChugh哪个问题,请用问题更新您的问题。我已将其作为答案发布。@VirenChugh将其从答案中删除并添加到您的问题中,然后发布您正在获得的错误。完成。问题实际上是未知的。我是否应该发布entire代码?
db.execSQL("DROP TBALE IF EXIISTS " + DATABASE_TABLE);
db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE);