SQLite的插入錯誤

Question

這是調用的文件：

@Override 
public void onCreate(Bundle savedInstanceState) { 

    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
    dbActivities = new DBActivities(this); 
    dbActivities.open(); // Create or open the existing DB if already created 
} 

private final BroadcastReceiver receiver = new BroadcastReceiver() { 
     @Override 
     public void onReceive(Context context, Intent intent) { 
      if(intent.getAction().equals("android.provider.Telephony.SMS_RECEIVED")) { 
       smsCount++; 
       Log.d(LOG_TAG, "smsCount=" +smsCount); 
       long dbInsertReturn = dbActivities.insertIntoDB(smsCount); 
      } 
     } 
}; 

這是做實際的數據庫操作中的文件：

public class DBActivities { 
    private static final String LOG_TAG = "SMSCounterActivity"; 

    private static final String DATABASE_NAME = "sms_details_database"; 
    private static final String DATABASE_TABLE = "sms_details_table"; 
    private static final String KEY_DATE = "date"; 
    private static final String KEY_SMS_CURRENT_COUNT = "sms_current_count"; 
    private static final String CREATE_SMS_DETAILS_TABLE = "CREATE TABLE " + DATABASE_TABLE + "(" + KEY_DATE + " TEXT, " + KEY_SMS_CURRENT_COUNT + " INTEGER);"; 
    private static final int DATABASE_VERSION = 1; 

    private final Context mContext; 
    private DatabaseHelper mDbHelper; 
    private SQLiteDatabase mDb; 

    public DBActivities(Context param_context) { 
     this.mContext = param_context; 
    } 

    // Database helper class for creating and updating database 
    private static class DatabaseHelper extends SQLiteOpenHelper { 
     DatabaseHelper(Context context) { 
      super(context, DATABASE_NAME, null, DATABASE_VERSION); 
     } 

     @Override 
     public void onCreate(SQLiteDatabase db) { 
      Log.i(LOG_TAG, "Creating DataBase: " + CREATE_SMS_DETAILS_TABLE); 
      db.execSQL(CREATE_SMS_DETAILS_TABLE); 
     } 

     @Override 
     public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
      Log.w(LOG_TAG, "Upgrading database from version " + oldVersion + " to " + newVersion); 
     } 
    } 

    // Create a new DB. If DB already exists, open it ! 
    public DBActivities open() throws SQLException { 
     Log.d(LOG_TAG, "Trying to open DB now. Table query=" + CREATE_SMS_DETAILS_TABLE); 
     mDbHelper = new DatabaseHelper(mContext); 
     mDb = mDbHelper.getWritableDatabase(); 
     return this; 
    } 

    public void close() { 
     mDbHelper.close(); 
    } 

    // DB format: date | sms_current_count 
    // date = YYYY-MM-DD 
    public long insertIntoDB (int db_value_to_insert) { 
     ContentValues dbValues = new ContentValues(); 
     dbValues.put(KEY_DATE, getCurrentDate()); 
     dbValues.put(KEY_SMS_CURRENT_COUNT, db_value_to_insert); 
     return mDb.insert(DATABASE_TABLE, null, dbValues); 
    } 

    private String getCurrentDate() { 
     Calendar calendar = Calendar.getInstance(); 
     String currentDate = calendar.get(Calendar.YEAR) + "-" + (calendar.get(Calendar.MONTH)+1) + "-" + calendar.get(Calendar.DAY_OF_MONTH); 
     Log.d(LOG_TAG, "currentDate=" +currentDate); 
     return currentDate; 
    } 
} 

這是logcat的日誌：

05-09 01:52:33.363: D/SMSCounterActivity(444): Trying to open DB now. Table query=CREATE TABLE sms_details_table(date TEXT, sms_current_count INTEGER); 
05-09 01:54:30.472: D/SMSCounterActivity(444): smsCount=1 
05-09 01:54:30.482: D/SMSCounterActivity(444): currentDate=2012-5-9 
05-09 01:54:30.592: I/Database(444): sqlite returned: error code = 1, msg = table sms_details_table has no column named sms_current_count 
05-09 01:54:30.612: E/Database(444): Error inserting sms_current_count=1 date=2012-5-9 
05-09 01:54:30.612: E/Database(444): android.database.sqlite.SQLiteException: table sms_details_table has no column named sms_current_count: , while compiling: INSERT INTO sms_details_table(sms_current_count, date) VALUES(?, ?); 
05-09 01:54:30.612: E/Database(444): at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method) 
05-09 01:54:30.612: E/Database(444): at android.database.sqlite.SQLiteCompiledSql.compile(SQLiteCompiledSql.java:91) 
05-09 01:54:30.612: E/Database(444): at android.database.sqlite.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:64) 
05-09 01:54:30.612: E/Database(444): at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:80) 
05-09 01:54:30.612: E/Database(444): at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:36) 
05-09 01:54:30.612: E/Database(444): at android.database.sqlite.SQLiteDatabase.compileStatement(SQLiteDatabase.java:1145) 
05-09 01:54:30.612: E/Database(444): at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1536) 
05-09 01:54:30.612: E/Database(444): at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1410) 
05-09 01:54:30.612: E/Database(444): at com.android.main.DBActivities.insertIntoDB(DBActivities.java:66) 
05-09 01:54:30.612: E/Database(444): at com.android.main.SMSCounterActivity$1.onReceive(SMSCounterActivity.java:52) 
05-09 01:54:30.612: E/Database(444): at android.app.ActivityThread$PackageInfo$ReceiverDispatcher$Args.run(ActivityThread.java:892) 
05-09 01:54:30.612: E/Database(444): at android.os.Handler.handleCallback(Handler.java:587) 
05-09 01:54:30.612: E/Database(444): at android.os.Handler.dispatchMessage(Handler.java:92) 
05-09 01:54:30.612: E/Database(444): at android.os.Looper.loop(Looper.java:123) 
05-09 01:54:30.612: E/Database(444): at android.app.ActivityThread.main(ActivityThread.java:4627) 
05-09 01:54:30.612: E/Database(444): at java.lang.reflect.Method.invokeNative(Native Method) 
05-09 01:54:30.612: E/Database(444): at java.lang.reflect.Method.invoke(Method.java:521) 
05-09 01:54:30.612: E/Database(444): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
05-09 01:54:30.612: E/Database(444): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
05-09 01:54:30.612: E/Database(444): at dalvik.system.NativeStart.main(Native Method) 

我無法弄清楚數據庫插入失敗的原因。 logcat顯示錶創建查詢是正常的。仍然sms_current_count列在表中缺少。

Answer 1

通常當你的創建腳本沒問題，並且在db中不存在一列時，這是因爲你在不增加數據庫版本的情況下改變了模式。如果是這種情況，你的CREATE腳本唯一出錯的地方就是它還沒有運行。