java - 以循环方式将表行添加到表布局

Question

我编写了这段代码，尝试在表布局内添加表行(包含 TextView )。这是循环完成的。我收到此错误:

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.test.testant/com.test.testant.products}: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.

我可以以某种方式覆盖父级上的removeView()吗？如果我不能，如何将removeView()合并到我的代码中？

产品.java

public class products extends Activity{
private DataBaseManager dataBase;

//put the table name and column in constants
public static final String TABLE_NAME_PRODUCTS = "products";

@Override
public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);

    setContentView(R.layout.products);
    TableLayout tl = (TableLayout) findViewById(R.id.prodTable);
    TableRow tr = (TableRow) findViewById(R.id.prodRow);



    //creates and open the database so we can use it
    dataBase = DataBaseManager.instance();

    Cursor cursor = dataBase.select("SELECT * FROM " + TABLE_NAME_PRODUCTS);
    while (cursor.moveToNext()){

        tl.addView(tr);


    }

}

产品.xml

<TableLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical"
        android:id="@+id/prodTable">

        <TableRow
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:clickable="false"
            android:id="@+id/prodRow">

            <TextView
                android:layout_width="0dp"
                android:layout_height="fill_parent"
                android:layout_weight=".08"
                android:textColor="#fff"
                android:id="@+id/prodCodeView"
                android:clickable="true" />
            <TextView
                android:layout_width="0dp"
                android:layout_height="fill_parent"
                android:layout_weight=".30"
                android:textColor="#fff"
                android:id="@+id/prodNameView"
                android:clickable="true" />
            <TextView
                android:layout_width="0dp"
                android:layout_height="fill_parent"
                android:layout_weight=".05"
                android:textColor="#fff"
                android:id="@+id/prodMUView" />
            <TextView
                android:layout_width="0dp"
                android:layout_height="fill_parent"
                android:layout_weight=".10"
                android:textColor="#fff"
                android:id="@+id/prodPriceView" />
            <TextView
                android:layout_width="0dp"
                android:layout_height="fill_parent"
                android:layout_weight=".05"
                android:textColor="#fff"
                android:id="@+id/prodVATView" />
            <TextView
                android:layout_width="0dp"
                android:layout_height="fill_parent"
                android:layout_weight=".05"
                android:textColor="#fff"
                android:id="@+id/prodIDView" />
        </TableRow>
    </TableLayout>

Answer 1

您正在尝试一次又一次地添加相同的 TableRow 表格。哪个导致异常:

java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.

您应该在循环中创建一个新的 TableRow

代码 fragment :

Cursor cursor = dataBase.select("SELECT * FROM " + TABLE_NAME_PRODUCTS);
while (cursor.moveToNext()){
    TableRow tr = new TableRow(this);
    //set width and height using layout params
    tl.addView(tr);
}

希望有帮助。