[英]Cardslib fragment undo swipe
我正在嘗試使用Cardslib庫以及可以刷卡和撤消的卡列表。 我的問題是,撤消欄總是顯示,單擊撤消不會執行任何操作。 通過調試,我意識到我的問題是CardArrayAdapter需要一個上下文,該上下文將在嘗試檢索撤消工具欄的LinearLayout時使用。 但是,當我通過主活動作為上下文時,它沒有找到撤消欄。
我的代碼如下:
MainActivity.java:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate( savedInstanceState );
setContentView( R.layout.main_layout );
BudgetCardFragment budgetCardFragment = (BudgetCardFragment)getSupportFragmentManager().
findFragmentById( R.id.fragment_budget_cards );
}
main_layout.xml:
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/fragment_budget_cards"
android:name="com.test.view.fragment.BudgetCardFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.test.Main"
tools:layout="@android:layout/list_content" />
BudgetCardFragment.java:
public class BudgetCardFragment extends Fragment {
public BudgetCardFragment(){}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate( R.layout.fragment_budget_card, container, true );
CardListView listView = (CardListView)rootView.findViewById(R.id.myList);
List<Card> cards= new ArrayList<Card>();
for (int i = 0; i < 3; i++) {
BudgetCard budgetCard = new BudgetCard( getActivity(), mListCategory.get(i).getName() );
cards.add( budgetCard );
}
BudgetCardAdapter budgetCardAdapter = new BudgetCardAdapter( getActivity(), cards );
if ( listView != null ) {
listView.setAdapter( budgetCardAdapter );
}
return rootView;
}
}
fragment_budget_card.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.test.Main">
<it.gmariotti.cardslib.library.view.CardListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/myList"/>
<!-- Include undo message layout -->
<include layout="@layout/list_card_undo_message"/>
</RelativeLayout>
BudgetCardAdapter.java:
public class BudgetCardAdapter extends CardArrayAdapter {
private Context mContext;
private List<Card> cards;
public BudgetCardAdapter( Context context, List<Card> cards ) {
super( context, cards );
this.mContext = context;
this.cards = cards;
//Enable undo controller
setEnableUndo(true);
}
@Override
public int getCount() {
return cards.size();
}
@Override
public Card getItem(int position) {
return cards.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
}
我得到的結果是我的卡片列表(很好),當我還沒有刷出任何卡片時(這是不好的),撤消欄位於屏幕中間。 感謝您的幫助,我確實整日都在努力尋找解決方案。
好吧,我想我應該通過再次閱讀我的問題來弄清楚。
我需要將一個活動傳遞給CardAdapter,但要在onCreateView()
。 在片段生命周期中,我應該假定該活動存在於onActivityCreated()
。
因此,對於那些對此問題的解決方案感興趣的人,這里是對BudgetCardFragment.java文件的更正:
public class BudgetCardFragment extends Fragment {
public BudgetCardFragment(){}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate( R.layout.fragment_budget_card, container, false );
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
CardListView listView = (CardListView)getActivity().findViewById(R.id.myList);
List<Card> cards = new ArrayList<Card>();
for (int i = 0; i < 3; i++) {
BudgetCard budgetCard = new BudgetCard( getActivity(), mListCategory.get(i).getName() );
cards.add( budgetCard );
}
BudgetCardAdapter budgetCardAdapter = new BudgetCardAdapter( getActivity(), cards );
if ( listView != null ) {
listView.setAdapter( budgetCardAdapter );
}
}
}
在這種情況下,您必須在onActivityCreated()
方法中創建ArrayAdapter。
請注意執行以下操作:
@Override
public Card getItem(int position) {
return cards.get(position);
}
這樣,您就可以使用本地卡。 當您調用添加,刪除...時,適配器將使用其自己的列表。
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