这是我的第一篇文章，如果发布错误，我很抱歉。
我目前正在尝试学习一些简单的android开发，并遇到了一个我无法弄清楚的错误。我下载了一些只存储用户名和密码的简单登录教程代码。
下载时代码运行正常。当我向数据库添加一些条目时，我开始收到错误。我仍然可以创建一个帐户，但是当我尝试登录时，它表示信息不匹配。我已经做了一些测试，我认为数据库在创建帐户期间没有存储任何信息，即使我收到了插入值时显示的确认消息。我也在控制台中收到此错误：“java.lang.IllegalArgumentException：无法绑定索引1处的参数，因为索引超出范围。语句有0个参数。”
感谢任何帮助。这是我认为与此问题相关的java代码。第一个是我创建帐户的地方，第二个是我与数据库交互的地方。如果您需要其他代码，请告诉我。谢谢！
更新
这是我的logcat。当我尝试提交信息时会出现错误。
01-22 02:05:46.292 1141-1141/com.techblogon.loginexample E/SQLiteLog﹕ (1) near ",": syntax error
01-22 02:05:46.302 1141-1141/com.techblogon.loginexample E/SQLiteDatabase﹕ Error inserting FCOLOR,=red USERNAME=home CAT=cat PASSWORD=password DOG=dog
android.database.sqlite.SQLiteException: near ",": syntax error (code 1): , while compiling: INSERT INTO LOGIN(FCOLOR,,USERNAME,CAT,PASSWORD,DOG) VALUES (?,?,?,?,?)
at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:889)
at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:500)
at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1467)
at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1339)
at com.team47.techProf.LoginDataBaseAdapter.insertEntry(LoginDataBaseAdapter.java:56)
at com.team47.techProf.SignUPActivity$1.onClick(SignUPActivity.java:75)
at android.view.View.performClick(View.java:4438)
at android.view.View$PerformClick.run(View.java:18422)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at dalvik.system.NativeStart.main(Native Method)
01-22 02:05:46.882 1141-1141/com.techblogon.loginexample W/EGL_emulation﹕ eglSurfaceAttrib not implemented
public class SignUPActivity extends Activity
{
EditText editTextUserName,editTextPassword,editTextConfirmPassword,editTextDog,editTextFColor, editTextCat;
Button btnCreateAccount;
LoginDataBaseAdapter loginDataBaseAdapter;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.signup);
// get Instance of Database Adapter
loginDataBaseAdapter=new LoginDataBaseAdapter(this);
loginDataBaseAdapter=loginDataBaseAdapter.open();
// Get References of Views
editTextUserName=(EditText)findViewById(R.id.editTextUserName);
editTextPassword=(EditText)findViewById(R.id.editTextPassword);
editTextConfirmPassword=(EditText)findViewById(R.id.editTextConfirmPassword);
editTextDog=(EditText)findViewById(R.id.editTextDog);
editTextFColor=(EditText)findViewById(R.id.editTextFColor);
editTextCat=(EditText)findViewById(R.id.editTextCat);
btnCreateAccount=(Button)findViewById(R.id.buttonCreateAccount);
btnCreateAccount.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
String userName=editTextUserName.getText().toString();
String password=editTextPassword.getText().toString();
String confirmPassword=editTextConfirmPassword.getText().toString();
String dog=editTextDog.getText().toString().toLowerCase();
String fcolor=editTextFColor.getText().toString().toLowerCase();
String cat=editTextCat.getText().toString().toLowerCase();
// check if any of the fields are vaccant
if(userName.equals("")||password.equals("")||confirmPassword.equals("")||dog.equals("")||fcolor.equals("")||cat.equals(""))
{
Toast.makeText(getApplicationContext(), "Field Vaccant", Toast.LENGTH_LONG).show();
return;
}
// check if both password matches
if(!password.equals(confirmPassword))
{
Toast.makeText(getApplicationContext(), "Password does not match", Toast.LENGTH_LONG).show();
return;
}
if (!dog.equals("dog"))
{
Toast.makeText(getApplicationContext(),"You did not type 'dog' correctly",Toast.LENGTH_LONG ).show();
return;
}
if (!cat.equals("cat"))
{
Toast.makeText(getApplicationContext(),"You did not type 'cat' correctly",Toast.LENGTH_LONG ).show();
return;
}
else
{
// Save the Data in Database
loginDataBaseAdapter.insertEntry(userName, password, dog, fcolor, cat);
Toast.makeText(getApplicationContext(), "Account Successfully Created ", Toast.LENGTH_LONG).show();
finish();
}
}
});
}
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
loginDataBaseAdapter.close();
}
}
public class LoginDataBaseAdapter
{
static final String DATABASE_NAME = "login.db";
static final int DATABASE_VERSION = 1;
public static final int NAME_COLUMN = 1;
// TODO: Create public field for each column in your table.
// SQL Statement to create a new database.
static final String DATABASE_CREATE = "create table "+"LOGIN"+
"( " +"ID"+" integer primary key autoincrement,"+ "USERNAME text,PASSWORD text, DOG text, FCOLOR text, CAT text ); ";
// Variable to hold the database instance
public SQLiteDatabase db;
// Context of the application using the database.
private final Context context;
// Database open/upgrade helper
private DataBaseHelper dbHelper;
public LoginDataBaseAdapter(Context _context)
{
context = _context;
dbHelper = new DataBaseHelper(context, DATABASE_NAME, null, DATABASE_VERSION);
}
public LoginDataBaseAdapter open() throws SQLException
{
db = dbHelper.getWritableDatabase();
return this;
}
public void close()
{
db.close();
}
public SQLiteDatabase getDatabaseInstance()
{
return db;
}
public void insertEntry(String userName,String password, String dog, String fcolor, String cat )
{
ContentValues newValues = new ContentValues();
// Assign values for each row.
newValues.put("USERNAME", userName);
newValues.put("PASSWORD",password);
newValues.put("DOG",dog);
newValues.put("FCOLOR,",fcolor);
newValues.put("CAT",cat);
// Insert the row into your table
db.insert("LOGIN", null, newValues);
//Toast.makeText(context, "Reminder Is Successfully Saved", Toast.LENGTH_LONG).show();
}
public int deleteEntry(String UserName)
{
//String id=String.valueOf(ID);
String where="USERNAME=?";
int numberOFEntriesDeleted= db.delete("LOGIN", where, new String[]{UserName}) ;
// Toast.makeText(context, "Number of Entry Deleted Successfully : "+numberOFEntriesDeleted, Toast.LENGTH_LONG).show();
return numberOFEntriesDeleted;
}
public String getPasswordEntry(String userName)
{
Cursor cursor=db.query("LOGIN", null, "USERNAME=?", new String[]{userName}, null, null, null);
if(cursor.getCount()<1) // UserName Not Exist
{
cursor.close();
return "NOT EXIST";
}
cursor.moveToFirst();
String password= cursor.getString(cursor.getColumnIndex("PASSWORD"));
cursor.close();
return password;
}
public void updateEntry(String userName,String password)
{
// Define the updated row content.
ContentValues updatedValues = new ContentValues();
// Assign values for each row.
updatedValues.put("USERNAME", userName);
updatedValues.put("PASSWORD",password);
String where="USERNAME = ?";
db.update("LOGIN",updatedValues, where, new String[]{userName});
}
}
答案 0 :(得分：0)
您的查询中有一个空白列名称：
INSERT INTO LOGIN(FCOLOR,,USERNAME,CAT,PASSWORD,DOG) VALUES (?,...
^^^ ^
看起来你插入的定义是错误的。