SQLite例外：沒有這樣的表

我在Android Studio中讀取一個簡單的數據庫，但是當我點擊保存按鈕時，ıt拋出一個異常，即「SQLite異常：沒有這樣的表」。我不明白問題在哪裏？我在下面分享代碼和logcat。感謝您的幫助。SQLite例外：沒有這樣的表

import android.content.ContentValues; 
import android.content.Context; 
import android.database.Cursor; 
import android.database.SQLException; 
import android.database.sqlite.SQLiteDatabase; 
import android.database.sqlite.SQLiteOpenHelper; 
import android.os.Message; 
import android.util.Log; 
import android.widget.Toast; 


public class Database{ 


    public static final String LOG_MESSAGE = "message"; 
    DatabaseHelper databaseHelper; 
    public Database(Context context){ 
     databaseHelper = new DatabaseHelper(context); 
    } 

    public long insertData(String name){ 
     SQLiteDatabase db = databaseHelper.getWritableDatabase(); 
     ContentValues contentValues = new ContentValues(); 
     contentValues.put(DatabaseHelper.NAME, name); 
     long id= db.insert(DatabaseHelper.TABLE_NAME ,null,contentValues); 
     db.close(); 
     return id; 
    } 

    public String getAllData(){ 
     SQLiteDatabase db = databaseHelper.getWritableDatabase(); 
     String[] columns = {DatabaseHelper.ID, DatabaseHelper.NAME}; 
     Cursor cursor = db.query(DatabaseHelper.TABLE_NAME,columns,null,null,null,null,null); 
     StringBuffer buffer = new StringBuffer(); 
     while(cursor.moveToNext()){ 
      int id = cursor.getInt(0); 
      String name = cursor.getString(1); 
      buffer.append(id +" "+name +"\n"); 
     } 
     cursor.close(); 
     return buffer.toString(); 
    } 



static class DatabaseHelper extends SQLiteOpenHelper{ 

    //database tanımlamaları buradan başlar 
    private static final String DATABASE_NAME = "veritabanim.db"; 
    private static final int DATABASE_VERSION = 3; 
    private static final String TABLE_NAME = "veritabani"; 
    private static final String ID = "_id"; 
    private static final String NAME = "name"; 
    private static final String CREATE_TABLE = 
        "CREATE TABLE " + TABLE_NAME + 
        "(" 
        + ID + "INTEGER PRIMARY KEY AUTOINCREMENT, " 
        + NAME + "VARCHAR(255)" + 
        "); "; 
    private static final String DROP_TABLE = "DROP TABLE IF EXISTS " + TABLE_NAME; 
    private Context context; 



    public DatabaseHelper(Context context) { 
     super(context, DATABASE_NAME, null, DATABASE_VERSION); 
     this.context =context; 
     Log.i(LOG_MESSAGE,"constructur"); 
    } 

    @Override 
    public void onCreate(SQLiteDatabase db) { 
     //CREATE TABLE deneme2 (_id INTEGER PRIMARY KEY AUYOINCREMENT, name VARCHAR(255)); 
     //yazılması gereken sorgu yukarıdakidir. 

     try { 
      Log.i(LOG_MESSAGE,"oncreate"); 
      db.execSQL(CREATE_TABLE); 
     } catch (SQLException e) { 
      e.printStackTrace(); 
     } 


    } 

    @Override 
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 

     try { 
      Log.i(LOG_MESSAGE,"upgrade"); 
      db.execSQL(DROP_TABLE); 
      onCreate(db); 
     } catch (SQLException e) { 
      e.printStackTrace(); 
     } 

    } 
} 
}

MainActivity

package com.example.ilk.deneme2veritabanislemleri; 


import android.content.ContentValues; 
import android.content.Context; 
import android.database.Cursor; 
import android.database.SQLException; 
import android.database.sqlite.SQLiteDatabase; 
import android.database.sqlite.SQLiteOpenHelper; 
import android.os.Message; 
import android.util.Log; 
import android.widget.Toast; 


public class Database{ 


    public static final String LOG_MESSAGE = "message"; 
    DatabaseHelper databaseHelper; 
    public Database(Context context){ 
     databaseHelper = new DatabaseHelper(context); 
    } 

    public long insertData(String name){ 
     SQLiteDatabase db = databaseHelper.getWritableDatabase(); 
     ContentValues contentValues = new ContentValues(); 
     contentValues.put(DatabaseHelper.NAME, name); 
     long id= db.insert(DatabaseHelper.TABLE_NAME ,null,contentValues); 
     db.close(); 
     return id; 
    } 

    public String getAllData(){ 
     SQLiteDatabase db = databaseHelper.getWritableDatabase(); 
     String[] columns = {DatabaseHelper.ID, DatabaseHelper.NAME}; 
     Cursor cursor = db.query(DatabaseHelper.TABLE_NAME,columns,null,null,null,null,null); 
     StringBuffer buffer = new StringBuffer(); 
     while(cursor.moveToNext()){ 
      int id = cursor.getInt(0); 
      String name = cursor.getString(1); 
      buffer.append(id +" "+name +"\n"); 
     } 
     cursor.close(); 
     return buffer.toString(); 
    } 



static class DatabaseHelper extends SQLiteOpenHelper{ 

    //database tanımlamaları buradan başlar 
    private static final String DATABASE_NAME = "veritabanim.db"; 
    private static final int DATABASE_VERSION = 3; 
    private static final String TABLE_NAME = "veritabani"; 
    private static final String ID = "_id"; 
    private static final String NAME = "name"; 
    private static final String CREATE_TABLE = 
        "CREATE TABLE " + TABLE_NAME + 
        "(" 
        + ID + "INTEGER PRIMARY KEY AUTOINCREMENT, " 
        + NAME + "VARCHAR(255)" + 
        "); "; 
    private static final String DROP_TABLE = "DROP TABLE IF EXISTS " + TABLE_NAME; 
    private Context context; 



    public DatabaseHelper(Context context) { 
     super(context, DATABASE_NAME, null, DATABASE_VERSION); 
     this.context =context; 
     Log.i(LOG_MESSAGE,"constructur"); 
    } 

    @Override 
    public void onCreate(SQLiteDatabase db) { 
     //CREATE TABLE deneme2 (_id INTEGER PRIMARY KEY AUYOINCREMENT, name VARCHAR(255)); 
     //yazılması gereken sorgu yukarıdakidir. 

     try { 
      Log.i(LOG_MESSAGE,"oncreate"); 
      db.execSQL(CREATE_TABLE); 
     } catch (SQLException e) { 
      e.printStackTrace(); 
     } 


    } 

    @Override 
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 

     try { 
      Log.i(LOG_MESSAGE,"upgrade"); 
      db.execSQL(DROP_TABLE); 
      onCreate(db); 
     } catch (SQLException e) { 
      e.printStackTrace(); 
     } 

    } 
} 
}

logcat的

06-27 19:07:21.286 29194-29194/com.example.ilk.deneme2veritabanislemleri E/SQLiteLog﹕ (1) no such table: veritabani 
06-27 19:07:21.286 29194-29194/com.example.ilk.deneme2veritabanislemleri E/SQLiteDatabase﹕ Error inserting name=yazı 
    android.database.sqlite.SQLiteException: no such table: veritabani (code 1): , while compiling: INSERT INTO veritabani(name) 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.example.ilk.deneme2veritabanislemleri.Database.insertData(Database.java:28) 
      at com.example.ilk.deneme2veritabanislemleri.MainActivity$1.onClick(MainActivity.java:48) 
      at android.view.View.performClick(View.java:4443) 
      at android.view.View$PerformClick.run(View.java:18433) 
      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:5021) 
      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:827) 
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:643) 
      at dalvik.system.NativeStart.main(Native Method)

來源

2015-06-27 TheSlayer

檢查創建表時，需要的空間位置：

ID + "INTEGER

這裏

NAME + "VARCHAR(255)"

嘗試絲毫這樣的：

private static final String CREATE_TABLE = 
       "CREATE TABLE " + TABLE_NAME + 
       "(" 
       + ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " 
       + NAME + " VARCHAR(255)" + 
       "); ";

來源

2015-06-27 16:18:35 isma3l

是，thak你了。我需要空間。就這樣私有靜態最後字符串CREATE_TABLE = 「CREATE TABLE」 + TABLE_NAME + 「（」 + ID + 「INTEGER PRIMARY KEY AUTOINCREMENT，」 + NAME + 「VARCHAR（255））;」 ; – TheSlayer

SQLite例外：沒有這樣的表

回答

相關問題