錯誤使用SQLite在Android

Question

我想的SQLite添加到我的項目，但我有這樣的錯誤，當我將數據發送到數據庫

> 03-21 18:59:20.742 27050-27050/org.lili14.taps E/SQLiteLog: (1) table 
> Images_table has no column named TAG0 03-21 18:59:20.782 
> 27050-27050/org.lili14.taps E/SQLiteDatabase: Error inserting ... 
>                 android.database.sqlite.SQLiteException: table Images_table has no 
> column named TAG0 (code 1): , while compiling: INSERT INTO 
> Images_table(TAG0,URL) VALUES (?,?) 
>                  at 
> android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native 
> Method) 
>                  at 
> android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:917) 
>                  at 
> android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:528) 
>                  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:1547) 
>                  at 
> android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1404) 
>                  at 
> org.lili14.taps.database.DatabaseHelper.insertData(DatabaseHelper.java:48) 
>                  at org.lili14.taps.TwoFragment$1.onClick(TwoFragment.java:75) 
>                  at android.view.View.performClick(View.java:4785) 
>                  at android.view.View$PerformClick.run(View.java:19869) 
>                  at android.os.Handler.handleCallback(Handler.java:739) 
>                  at android.os.Handler.dispatchMessage(Handler.java:95) 
>                  at android.os.Looper.loop(Looper.java:155) 
>                  at android.app.ActivityThread.main(ActivityThread.java:5696) 
>                  at java.lang.reflect.Method.invoke(Native Method) 
>                  at java.lang.reflect.Method.invoke(Method.java:372) 
>                  at 
> com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1029) 
>                  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:824) 

這是我DatabaseHelper類

public class DatabaseHelper extends SQLiteOpenHelper { 
    public static final String DATABASE_NAME = "Images.db"; 
    public static final String TABLE_NAME = "Images_table"; 


public static final String col01 = "URL"; 
public static final String col02 = "TAG0"; 



public DatabaseHelper(Context context) { 
    super(context, DATABASE_NAME, null, 1); 

} 

@Override 
public void onCreate(SQLiteDatabase db) { 

    db.execSQL("create table " + TABLE_NAME + " (id INTEGER PRIMARY KEY AUTOINCREMENT, TAG0 TEXT, URL TEXT)"); 


} 

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

    db.execSQL("DROP TABLE IF EXISTS "+ TABLE_NAME); 
    onCreate(db); 
} 

public boolean insertData(String url, String tag){ 

    SQLiteDatabase db = this.getWritableDatabase(); 
    ContentValues contentValues = new ContentValues(); 
    contentValues.put(col01, url); 
    contentValues.put(col02, tag); 
    long result = db.insert(TABLE_NAME, null, contentValues); 

    if(result == -1){ 
     return false; 

    } 
    else{ 
     return true; 
    } 
} 



public Cursor getAllDate(){ 

    SQLiteDatabase db = this.getWritableDatabase(); 
    Cursor res = db.rawQuery("Select * from "+TABLE_NAME, null); 
    return res; 
} 

}

如果我刪除ContentValue工作第二值，但沒有保存所有數據 我要救僅有2值和自動生成的ID在構造

Answer 1

嘗試改變數據庫版本：

super(context, DATABASE_NAME, null, 2);