不断得到错误的代码1

有人可以告诉那个代码有什么问题不能解决它。不断得到错误的代码1

它一直告诉我，表没有列。感谢

public class DatabaseHandlerTest extends SQLiteOpenHelper { 

// All Static variables 
// Database Version 
private static final int DATABASE_VERSION = 1; 

// Database Name 
private static final String DATABASE_NAME = "MessagesManager"; 

// messages table name 
private static final String TABLE_MESSAGE = "message"; 


// messages Table Columns names 
private static final String KEY_ID = "id"; 
private static final String KEY_USER_NAME = "user_name"; 
private static final String KEY_USER_MESSAGE = "user_messgae"; 


public DatabaseHandlerTest(Context context) { 
    super(context, DATABASE_NAME, null, DATABASE_VERSION); 
} 

// Creating Tables 
@Override 
public void onCreate(SQLiteDatabase db) { 

    String CREATE_MESSAGE_TABLE = 
      "CREATE TABLE " 
        + TABLE_MESSAGE + "(" 
        + KEY_ID + " INTEGER PRIMARY KEY," 
        + KEY_USER_NAME + " TEXT," 
        + KEY_USER_MESSAGE + " TEXT" + ")"; 
    /* String CREATE_CONTACTS_TABLE = 
      "CREATE TABLE " 
        + TABLE_CONTACTS + "(" 
        + KEY_ID + " INTEGER PRIMARY KEY," 
        + KEY_NAME + " TEXT," 
        + KEY_PH_NO + " TEXT" + ")";*/ 
    db.execSQL(CREATE_MESSAGE_TABLE); 
} 

// Upgrading database 
@Override 
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
    // Drop older table if existed 
    db.execSQL("DROP TABLE IF EXISTS " + TABLE_MESSAGE); 

    // Create tables again 
    onCreate(db); 
} 

/** 
* All CRUD(Create, Read, Update, Delete) Operations 
*/ 

// Adding new message 
void addMessage(ChatMessage msg) { 
    SQLiteDatabase db = this.getWritableDatabase(); 


    ContentValues values = new ContentValues(); 

    values.put(KEY_USER_NAME, msg.getmUsername()); 
    values.put(KEY_USER_MESSAGE, msg.getmUserMessge()); 

    // Inserting Row 
    db.insert(TABLE_MESSAGE, null, values); 
    db.close(); // Closing database connection 
} 

// Getting single message 
public ChatMessage getMessage(String id) { 
    SQLiteDatabase db = this.getReadableDatabase(); 

    Cursor cursor = db.query(TABLE_MESSAGE, new String[]{ 
        KEY_ID, 
        KEY_USER_NAME, 
        KEY_USER_MESSAGE}, KEY_ID + "=?", 
      new String[]{id}, null, null, null, null); 
    if (cursor != null) 
     cursor.moveToFirst(); 

    ChatMessage msg = new ChatMessage(); 
    msg.setmId(Integer.parseInt(cursor.getString(0))); 
    msg.setmUsername(cursor.getString(6)); 
    msg.setmUserMessge(cursor.getString(7)); 

    // return message 
    return msg; 
} 

// Getting All messages 
public List<ChatMessage> getAllMessages() { 
    List<ChatMessage> messageList = new ArrayList<>(); 
    // Select All Query 
    String selectQuery = "SELECT * FROM " + TABLE_MESSAGE; 

    SQLiteDatabase db = this.getWritableDatabase(); 
    Cursor cursor = db.rawQuery(selectQuery, null); 

    // looping through all rows and adding to list 
    if (cursor.moveToFirst()) { 
     do { 
      ChatMessage msg = new ChatMessage(); 

      msg.setmId(Integer.parseInt(cursor.getString(0))); 
      msg.setmUsername(cursor.getString(1)); 
      msg.setmUserMessge(cursor.getString(2)); 
      // Adding message to list 
      messageList.add(msg); 
     } while (cursor.moveToNext()); 
    } 


    // return message list 
    return messageList; 
} 

// Updating single message 
public int updateMessage(ChatMessage msg) { 
    SQLiteDatabase db = this.getWritableDatabase(); 

    ContentValues values = new ContentValues(); 

    values.put(KEY_USER_NAME, msg.getmUsername()); 
    values.put(KEY_USER_MESSAGE, msg.getmUserMessge()); 

    // updating row 
    return db.update(TABLE_MESSAGE, values, KEY_ID + " = ?", 
      new String[]{String.valueOf(msg.getmId())}); 
} 

// Deleting single message 
public void deleteMessage(ChatMessage msg) { 
    SQLiteDatabase db = this.getWritableDatabase(); 
    db.delete(TABLE_MESSAGE, KEY_ID + " = ?", 
      new String[]{String.valueOf(msg.getmId())}); 
    db.close(); 
} 


// Getting messages Count 
public int getMessageCount() { 
    String countQuery = "SELECT * FROM " + TABLE_MESSAGE; 
    SQLiteDatabase db = this.getReadableDatabase(); 
    Cursor cursor = db.rawQuery(countQuery, null); 
    cursor.close(); 

    // return count 
    return cursor.getCount(); 
}

}

02-04 23:17:26.830 14306-14306/com.android.myshull E/SQLiteLog: (1) table message has no column named user_name 
02-04 23:17:26.830 14306-14306/com.android.myshull E/SQLiteDatabase: Error inserting user_name=Test user_messgae=TEST 
                     android.database.sqlite.SQLiteException: table message has no column named user_name (code 1): , while compiling: INSERT INTO message(user_name,user_messgae) VALUES (?,?) 
                      at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method) 
                      at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:887) 
                      at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:498) 
                      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:1469) 
                      at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1341) 
                      at com.tal.android.myshull.DatabaseHandlerTest.addMessage(DatabaseHandlerTest.java:83) 
                      at com.tal.android.myshull.TestDataBaseFragment$1.onClick(TestDataBaseFragment.java:53) 
                      at android.view.View.performClick(View.java:5198) 
                      at android.view.View$PerformClick.run(View.java:21147) 
                      at android.os.Handler.handleCallback(Handler.java:739) 
                      at android.os.Handler.dispatchMessage(Handler.java:95) 
                      at android.os.Looper.loop(Looper.java:148) 
                      at android.app.ActivityThread.main(ActivityThread.java:5417) 
                      at java.lang.reflect.Method.invoke(Native Method) 
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

来源

2016-02-05 user3341575

看起来您已经更新了数据库创建表查询，可以设置'DATABASE_VERSION = 2;'或'清除应用程序数据'并重试。 –

以及检查代码，它并创建数据库中的表，

private static final String KEY_ID = "id"; 
private static final String KEY_USER_NAME = "user_name"; 
private static final String KEY_USER_MESSAGE = "user_messages"; 

String CREATE_MESSAGE_TABLE = 
     "CREATE TABLE " 
       + " message " + "(" 
       + KEY_ID + " INTEGER PRIMARY KEY," 
       + KEY_USER_NAME + " TEXT, " 
       + KEY_USER_MESSAGE + " TEXT" + ")";

你可能要卸载的程序清除数据库，重新安装它，

来源

2016-02-05 05:09:14

我认为@Pankaj Nimgade是正确的，当你有没有改变SQLite结构，你将不得不清除你的应用程序数据。因为如果存在同名的表，sqlite不会检查表中的任何更改。它只是假设表没有变化。

来源

2016-02-05 05:26:38

不断得到错误的代码1

回答

相关问题