在列表视图中结束多选项会删除列表项填充

时间:2015-06-17 11:43:59

标签: android-layout android-listview android-recyclerview android-4.1-jelly-bean

我只能使用JellyBean设备(Samsung Galaxy S3上的Android 4.1.2)重建此行为。使用KitKat或Lollipop时,没有出现此问题。

我有一个RecyclerView,其中包含可能多选的项目列表。当我在列表中选择一些项目(多选项被激活)并通过单击工具栏左上角的图标再次退出时,列表中的某些项目将丢失其填充。奇怪的是它并不总是发生在同一个项目上,每次都不会发生在同一个项目上。当我将项目滚出显示器并将其向后滚动到视图中时,填充回来并且正确。

enter image description here

在我覆盖了onRebind()方法并将填充重新应用到项目后,问题不再发生了 - 但是 - 它会发生。

@Override
protected void onRebind() {
    super.onRebind();
    mListItem.setPadding(20, 20, 20, 20);
}

这是我的DocumentHolder类:

public class DocumentHolder extends SwappingHolder implements View.OnClickListener, View.OnLongClickListener {
    private final RelativeLayout mListItem;
    private final TextView mNameTextView;
    private final ImageView mAttachmentView;
    private final TextView mTitleTextView;
    private final TextView mDateView;
    private final ImageView mTypeView;
    private Document mDocument;
    private boolean mIsAvailableOffline;

    @Override
    protected void onRebind() {
        super.onRebind();
        mListItem.setPadding(20, 20, 20, 20);
    }

    public DocumentHolder(View itemView, MultiSelector multiSelector) {
        super(itemView, multiSelector);

        mListItem = (RelativeLayout) itemView.findViewById(R.id.list_item_doc);
        mNameTextView = (TextView) itemView.findViewById(R.id.list_item_document_name);
        mAttachmentView = (ImageView) itemView.findViewById(R.id.list_item_document_attachment);
        mDateView = (TextView) itemView.findViewById(R.id.list_item_document_date);
        mTitleTextView = (TextView) itemView.findViewById(R.id.list_item_document_title);
        mTypeView = (ImageView) itemView.findViewById(R.id.list_item_document_type);

        itemView.setOnClickListener(this);
        itemView.setOnLongClickListener(this);
        itemView.setLongClickable(true);
        itemView.setLongClickable(true);
    }

    public void bindDocument(Document document) {
        mDocument = document;
        mNameTextView.setText(document.getDisplayName(mFolderType));
        mAttachmentView.setVisibility(document.isHasAttachments() ? View.VISIBLE : View.INVISIBLE);
        mTitleTextView.setText(document.getTitle());

        int iconId = IconHelper.getListItemIcon(document, true);
        mTypeView.setImageResource(iconId);

        mDateView.setText(DateFormatter.getShortFormattedDate(document.getReceivingDate()));

        mNameTextView.setTextAppearance(mContext, R.style.ListItemSenderUnread);
        mTitleTextView.setTextAppearance(mContext, R.style.ListItemTitleUnread);
        mDateView.setTextAppearance(mContext, R.style.ListItemDateUnread);

        // offline style
        mIsAvailableOffline = mAttachmentService.isAvailableOffline(mDocument.getId());
        if (mOfflineMode) {
            if (!mIsAvailableOffline) {
                mNameTextView.setTextAppearance(mContext, R.style.ListItemSenderOffline);
                mTitleTextView.setTextAppearance(mContext, R.style.ListItemTitleOffline);
                mDateView.setTextAppearance(mContext, R.style.ListItemDateOffline);
            }
        }
    }

    @Override
    public void onClick(View v) {
        if (!mOfflineMode || mIsAvailableOffline) {
            mItemListAdapterCallbacks.onDocumentClick(this);
        }
    }

    @Override
    public boolean onLongClick(View v) {
        if (!mOfflineMode) {
            mItemListAdapterCallbacks.onDocumentLongClick(this);
        }
        return true;
    }

    public Document getDocument() {
        return mDocument;
    }
}   

这是列表项的布局XML文件:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/list_item_doc"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="?android:attr/selectableItemBackground"
    android:padding="12dp">

    <TextView
        android:id="@+id/list_item_document_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_toLeftOf="@+id/list_item_document_attachment"
        android:ellipsize="end"
        android:gravity="center_vertical"
        android:minHeight="24dp"
        android:singleLine="true" />

    <ImageView
        android:id="@+id/list_item_document_attachment"
        android:layout_width="24dp"
        android:layout_height="24dp"
        android:layout_alignBottom="@id/list_item_document_name"
        android:layout_toLeftOf="@+id/list_item_document_date"
        android:padding="4dp"
        android:src="@drawable/ic_attachment_gray" />

    <TextView
        android:id="@+id/list_item_document_date"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@id/list_item_document_name"
        android:layout_alignParentRight="true"
        android:ellipsize="end"
        android:gravity="center_vertical"
        android:minHeight="24dp"
        android:singleLine="true" />

    <TextView
        android:id="@+id/list_item_document_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/list_item_document_type"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/list_item_document_name"
        android:layout_toLeftOf="@+id/list_item_document_type"
        android:ellipsize="end"
        android:gravity="center_vertical"
        android:minHeight="24dp"
        android:paddingTop="5dp"
        android:singleLine="true" />

    <ImageView
        android:id="@+id/list_item_document_type"
        android:layout_width="24dp"
        android:layout_height="24dp"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/list_item_document_date"
        android:src="@drawable/ic_folder" />

</RelativeLayout>

退出多选模式后,如何修复填充保留在布局XML文件中定义的12dp的行为?

1 个答案:

答案 0 :(得分:0)

终于找到了解决方案!

问题在于布局XML文件:

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/list_item_doc"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="?android:attr/selectableItemBackground"
    android:padding="12dp">

背景属性对于Jelly Bean设备来说似乎并不有效。从

更改值
android:background="?android:attr/selectableItemBackground"

android:background="@color/myBackgroundColor"

用于预KitKat设备解决了这个问题。