setItemChecked() 视图无法更改

Question

出于某种原因，我无法以编程方式在列表视图上设置选中的行。它在 setOnItemLongClickListener 中正常工作。

屏幕旋转后，我试图在我的列表视图上调用 setItemChecked()。根据日志，检查了正确的行，但我没有看到更改。

如果我 load/refresh 数据，我调用下面的 setupList() 方法。如果 purchaseOrderArrayList 不为空，也会在 onCreate 方法中调用此方法。

private void setupList() {

    mPurchaseOrderListView.setAdapter(new PurchaseOrderListAdapter(getActivity(), purchaseOrdersArrayList));

    if (mSelectedPurchaseOrderIndex != -1) {
        //this is where it does not work :(
        mPurchaseOrderListView.setItemChecked(mSelectedPurchaseOrderIndex, true);
        Log.v(Constants.LOG, "number of selections = " + mPurchaseOrderListView.getCheckedItemCount());
        Log.v(Constants.LOG, "id     of selections = " + mPurchaseOrderListView.getCheckedItemPosition());
        Log.v(Constants.LOG, "choice mode = " + mPurchaseOrderListView.getChoiceMode());
    }

    mPurchaseOrderListView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
        @Override
        public boolean onItemLongClick(final AdapterView<?> parent, View view, final int position, long id) {

            // if actionMode is null "not started"
            if (mActionMode != null)
                return false;

            // Start the CAB
            mActionMode = getActivity().startActionMode(mActionModeCallback);
            mActionMode.setTag(purchaseOrdersArrayList.get(position));
            mSelectedPurchaseOrderIndex = position;
            view.setActivated(true);
            return true;
        }
    });
}

这是我的列表视图的布局 (fragment_purchase_orders.xml)

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/centered_background"
tools:context="com.posmanagement.mamobile.PurchaseOrderFragment">

<ListView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:id="@+id/purchaseOrderListView"
    android:choiceMode="singleChoice"
    />

这是行的布局 (simple_row_layout.xml)

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@drawable/simple_list_background"
android:clickable="false"
android:descendantFocusability="blocksDescendants"
android:focusable="false"
android:focusableInTouchMode="false">

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceMedium"
    android:text="Item Description"
    android:id="@+id/label"
    android:paddingLeft="5dp"
    android:paddingRight="5dp"
    android:clickable="false"
    android:focusable="false"
    android:focusableInTouchMode="false"
    android:textColor="#191919"/>

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceSmall"
    android:text="012548"
    android:id="@+id/subLabel"
    android:paddingLeft="5dp"
    android:paddingRight="5dp"
    android:clickable="false"
    android:focusable="false"
    android:focusableInTouchMode="false"
    android:textColor="#646565"/>

这里是行背景的布局 (simple_list_background.xml)

<selector xmlns:android="http://schemas.android.com/apk/res/android"
android:exitFadeDuration="@android:integer/config_mediumAnimTime">

<item android:drawable="@android:color/darker_gray" android:state_pressed="true"/>
<item android:drawable="@color/yellow_color" android:state_selected="true"/>
<item android:drawable="@color/green_color" android:state_activated="true"/>
<item android:drawable="@color/white_color"/>

Answer 1

而不是使用

view.setActivated(true)

我用过

mPurchaseOrderList.setItemChecked(position, true)

一切正常，我不再需要存储位置。因此我删除了 mSelectedPurchaseOrderIndex 变量。（注意我相信这是因为列表视图包含在片段中，如果列表视图在 activity 我确实需要保存所选位置）

setItemChecked() 视图无法更改

setItemChecked() view failing to change

android

listview

android-layout

android-fragments

android-activity