我正在开发一个英日学习应用程序，其中有一堆用户可以刷卡的卡片，并且在每张当前卡片上，用户可以触摸卡片以翻转到卡片的另一侧，显示了这个词的含义。
对于滑动功能，我使用了一个支持setOnItemClick的库SwipeFlingAdapterView。现在我需要做翻转部分。我在这里阅读教程，需要2个片段才能完成翻转： https://developer.android.com/training/animation/cardflip.html
结构Im设置如下：
stack_of_cards_fragment.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
......
>
<com.lorentzos.flingswipe.SwipeFlingAdapterView
android:id="@+id/swipeFlingAdapterViewFront"
android:layout_width="match_parent"
android:layout_height="match_parent"
</com.lorentzos.flingswipe.SwipeFlingAdapterView>
</FrameLayout>
StackOfCardsFragment.java
public class StackOfCardsFragment extends Fragment {
ArrayList<TestModel> cardsList;
Context context;
@Override
public void onAttach(Context context) {
super.onAttach(context);
this.context = context;
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
final View view = inflater.inflate(R.layout.stack_of_cards_fragment,container,false);
final CardsAdapter arrayCardsAdapter;
cardsList = new ArrayList<>();
for (int i = 0; i < 10; i++) {
//dump data
TestModel model = new TestModel();
model.isFlipped = false;
cardsList.add(model);
}
SwipeFlingAdapterView flingContainer = ButterKnife.findById(view,R.id.swipeFlingAdapterViewFront);
ButterKnife.bind(this, view);
arrayCardsAdapter = new CardsAdapter(context, cardsList);
flingContainer.setAdapter(arrayCardsAdapter);
flingContainer.setFlingListener(new SwipeFlingAdapterView.onFlingListener() {
@Override
public void removeFirstObjectInAdapter() {
Log.d("LIST", "removed object!");
if(!cardsList.isEmpty())
{arrayCardsAdapter.remove(0);}
}
@Override
public void onLeftCardExit(Object dataObject) {
Log.e("Swipe Direction","Left");
}
@Override
public void onRightCardExit(Object dataObject) {
Log.e("Swipe Direction","Right");
}
@Override
public void onAdapterAboutToEmpty(int itemsInAdapter) {
if(!cardsList.isEmpty()) {
arrayCardsAdapter.notifyDataSetChanged();
Log.d("LIST", "notified");
}else Log.e("Check Empty","Its empty");
}
@Override
public void onScroll(float scrollProgressPercent) {
Log.e("onScroll", "scrollProgressPercent");
}
});
flingContainer.setOnItemClickListener(new SwipeFlingAdapterView.OnItemClickListener() {
@Override
public void onItemClicked(int itemPosition, Object dataObject) {
//This is where I want to change the Front Card Fragment to Back Card Fragment.
}
});
return view;
}
}
以下是我努力做的部分。
flash_card_layout.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="wrap_content"
android:background="@android:color/holo_blue_dark">
<LinearLayout
android:id="@+id/child_fragment_container"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
</LinearLayout>
</LinearLayout>
CardsAdapter.java
公共类CardsAdapter扩展BaseAdapter { 上下文上下文;
ArrayList<TestModel> cardsList;
ViewFlipper viewFlipper;
public CardsAdapter(Context context, ArrayList cardsList ) {
this.context = context;
this.cardsList = cardsList;
}
@Override
public int getCount() {
return cardsList.size();
}
@Override
public Object getItem(final int i) {
return cardsList.get(i);
}
@Override
public long getItemId(int i) {
return i;
}
@Override
public View getView(final int i, View view, final ViewGroup viewGroup) {
if (view == null) {
LayoutInflater vi = (LayoutInflater) viewGroup.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = vi.inflate(R.layout.flash_card_layout, viewGroup, false);
//This is where I want to set the Front Card Fragment
Fragment frontCardFragment = new EachFrontCardFragment();
FragmentTransaction transaction = ((VocabularyGameActivity) context).getSupportFragmentManager().beginTransaction();
transaction.addToBackStack(null);
transaction.add(R.id.child_fragment_container, frontCardFragment);
transaction.commit();
}
return view;
}
public void remove(int i) {
cardsList.remove(i);
notifyDataSetChanged();
}
}
each_card_front_fragment.xml和each_card_back_fragment.xml的一个
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/cardviewfront">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:paddingTop="20dp"
android:paddingLeft="20dp"
android:paddingRight="20dp">
<TextView android:id="@+id/txtWord_cardfront"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="English"
android:textStyle="bold"
android:textSize="50sp"
android:textColor="@android:color/black"
android:layout_gravity="center"
android:layout_marginTop="20dp"
android:layout_marginBottom="50dp"
android:layout_marginLeft="4dp"
android:layout_marginRight="4dp"/>
</LinearLayout>
</android.support.v7.widget.CardView>
</FrameLayout>
我已经为each_card_front_fragment和each_card_back_fragment创建了2个片段。
我在这里缺少什么？上面的所有代码只显示了StackOfCardsFragment中的cardAdapter（它只是一个背景），但是each_card_front_fragment并没有显示出来。
我已经尝试从（CardsAdapter）BaseAdapter设置一个BroadcastReceiver，发送到VocabulartyActivity，在那里设置each_card_front_fragment但结果相同。
是在BaseAdapter中设置Fragment的任何其他方法吗？