调用setVisibility时不改变焦点(View.VISIBLE)

Question

我有一个场景,当一个动作发生时,我想让某些字段可见.这很好用,但是当我在包含一些其他字段(如TextEdit)的LinearLayout上调用setVisible(View.VISIBLE)时,焦点会转移到TextEdit(或至少屏幕滚动到它).

调用setVisibility(View.VISIBLE)时有没有办法不改变焦点？

LinearLayout的XML布局我可以调用setVisible:

<LinearLayout 
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:focusable="true"
    android:focusableInTouchMode="true">

    <TextView
        android:id="@+id/name"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:textSize="18sp"
        android:textStyle="normal"
        android:paddingLeft="5dp"
        android:paddingRight="5dp"
        android:paddingBottom="5dp"
        android:text="" />

     <EditText android:id="@+id/entry"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:inputType="textMultiLine"
        android:gravity="right" /> 

    <View
        android:layout_marginTop="8dp"
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:background="@color/grey"
        android:visibility="gone" />

</LinearLayout>

初始化它的代码:

private TextView mName;
private EditText mEntry;

...

     private void initialize() {

        LayoutInflater inflater = (LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        inflater.inflate(R.layout.field_multiline_entry, this);

        // setup fields
        mName = (TextView)findViewById(R.id.name);
        mEntry = (EditText)findViewById(R.id.entry);
        mEntry.addTextChangedListener(textWatcher);

    }

并且调用setVisibility的代码:

        if(sectionFieldView != null && sectionFieldView.getVisibility() != View.VISIBLE) 
        {
            sectionFieldView.setVisibility(View.VISIBLE);
        }

谢谢!

UPDATE

感谢下面的朋友,以下代码有效.它基本上使LinearLayout的所有后代都无法获得焦点,这意味着当显示时,屏幕不会滚动到它们,因为它们没有获得焦点.到目前为止,我发现只有这样才能防止这种情况发生......

        ((ViewGroup) fieldView).setDescendantFocusability(ViewGroup.FOCUS_BLOCK_DESCENDANTS);
        fieldView.setVisibility(View.VISIBLE);
        ((ViewGroup) fieldView).setDescendantFocusability(ViewGroup.FOCUS_AFTER_DESCENDANTS);

Answer 1

您可以尝试android:descendantFocusability使用beforeDescendantsLinearLayout上的with 参数吗？

Constant    Value   Description
beforeDescendants   0   The ViewGroup will get focus before any of its descendants.
afterDescendants    1   The ViewGroup will get focus only if none of its descendants want it.
blocksDescendants   2   The ViewGroup will block its descendants from receiving focus.