Question

我无法理解为什么数据库要么不保存我输入的值，要么是我用来拉动所有数据无法正常工作的方法。它不会抛出任何它无法正常工作的错误。这是代码：

    private static final String QUERY_TRIANGLE_CREATE_TABLE =
        "CREATE TABLE " + TRIANGLE_TABLE_NAME + " (" + TRIANGLE_COL_ID + " INTEGER PRIMARY KEY, " +
                TRIANGLE_VALUE_A + " TEXT, " + TRIANGLE_VALUE_C + "TEXT, " + TRIANGLE_VALUE_B + " TEXT, " + TRIANGLE_RESULT + " TEXT," + TRIANGLE_HISTORY_INFORMATION + " TEXT" +  "  );";


public void insertTriangleCalc(String a,String b, String c,String d,String e){
    SQLiteDatabase database = this.getWritableDatabase();
    ContentValues values = new ContentValues();
    values.put(TRIANGLE_VALUE_A,a);
    values.put(TRIANGLE_VALUE_B,b);
    values.put(TRIANGLE_VALUE_C,c);
    values.put(TRIANGLE_RESULT,d);
    values.put(TRIANGLE_HISTORY_INFORMATION,e);

    database.insert("triangle", null, values);
    database.close();

}
public void insertTriangleCalc(String a,String b, String c,String d){
    SQLiteDatabase database = this.getWritableDatabase();
    ContentValues values = new ContentValues();
    values.put(TRIANGLE_VALUE_A,a);
    values.put(TRIANGLE_VALUE_B,b);
    values.put(TRIANGLE_RESULT,c);
    values.put(TRIANGLE_HISTORY_INFORMATION,d);

    database.insert("triangle", null, values);
    database.close();}
public List<Triangle> ObjectRead() {

    List<Triangle> valuesList = new ArrayList<>();

    String sql = "SELECT  * FROM triangle ORDER BY id DESC";
    SQLiteDatabase db = this.getWritableDatabase();
    Cursor cursor = db.rawQuery(sql, null);

    if (cursor.moveToFirst()) {
        do {

            int id = Integer.parseInt(cursor.getString(cursor.getColumnIndex("id")));
            String valueA = cursor.getString(cursor.getColumnIndex("valueA"));
            String valueB = cursor.getString(cursor.getColumnIndex("valueB"));
            String valueC="0";
            try {

            } catch (Exception e){

            }

            String result = cursor.getString(cursor.getColumnIndex("result"));
            String history = cursor.getString(cursor.getColumnIndex("history"));

            Triangle triangle = new Triangle();
            triangle.id = id;
            triangle.valueA = valueA;
            triangle.valueB  = valueB;
            triangle.valueC = valueC;
            triangle.Result = result;
            triangle.history = history;
            valuesList.add(triangle);

        } while (cursor.moveToNext());
    }
    cursor.close();
    db.close();

    return valuesList;
}

任何人都可以查看它并帮我弄清楚我没有正确设置的内容。它适用于public void insertTriangleCalc（String a，String b，String c，String d），但不适用于public void insertTriangleCalc（String a，String b，String c，String d，String e）。

Answer 1

决定从上到下进行检查，由于缺少空白空间而发生了整件事情：TRIANGLE_VALUE_C +＆＃34; TEXT，＆＃34; ＆lt; - 这里。现在已经解决了，它最终可以正确存储数据。

数据库不使用重载方法保存值

1 个答案: