android.database.sqlite.SQLiteException: unrecognized token: "266_1"

public String getOneFaceFeature(String faceCountId) {
    Cursor cursor = db.rawQuery("select id," + FACE_FEATURE + " from " + TAB_FACE_FEATURE +" where " + FACE_COUNT_ID + " = " + faceCountId, null);
 

異常資訊是不能識別資訊。發現查詢條件是String型別。而在sql語法中字串是要加單引號‘’的，否則無法識別。當然int型別就不需要了。

修改如下：

 Cursor cursor = db.rawQuery("select id," + FACE_FEATURE + " from " + TAB_FACE_FEATURE +" where " + FACE_COUNT_ID + " = '" + faceCountId+"' ", null);

問題解決。

同時要注意，單引號和字串之間不能有空格，否則不是原來的值，會報android.database.CursorIndexOutOfBoundsException: Index 0 requested, with a size of 0異常。見我上篇部落格。