我有3 DialogFragments A，B和C.我使用Fragment A从Activity开始FragmentTransaction，如下所示：
FragmentA dialog = new FragmentA();
Bundle bundle = new Bundle();
bundle.putString("GameLevelType", "Puzzle");
dialog.setArguments(bundle);
FragmentTransaction transaction = ((AppCompatActivity) context).getSupportFragmentManager().beginTransaction();
transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
transaction.add(android.R.id.content, dialog).addToBackStack(null).commit();
现在我从Fragment A的RecyclerView适配器中启动Fragment B，如下所示：
class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
TextView levelName;
CardView gameCard;
public MyViewHolder(View itemView) {
super(itemView);
levelName = (TextView) itemView.findViewById(R.id.gameText);
gameCard = (CardView) itemView.findViewById(R.id.gameCard);
gameCard.setOnClickListener(this);
}
@Override
public void onClick(View view) {
Handler handler = new Handler();
handler.post(new Runnable() {
@Override
public void run() {
FragmentB fragment = new FragmentB();
FragmentTransaction gameTransaction = ((AppCompatActivity)context).getSupportFragmentManager().beginTransaction();
gameTransaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
gameTransaction.add(android.R.id.content, fragment).addToBackStack(null).commit();
//fragment.show(((AppCompatActivity)context).getSupportFragmentManager(),"PuzzleDialog");
}
});
//((AppCompatActivity) context).getSupportFragmentManager().popBackStack();
}
}
现在我从Fragment C开始Fragment B。但是Fragment C不可见。
以下是Fragment C：
public class FragmentC extends DialogFragment implements OnStartDragListener {
private ItemTouchHelper mItemTouchHelper;
RecyclerView recyclerView;
Integer[] str = {R.drawable.a1, R.drawable.a2, R.drawable.a3, R.drawable.a4, R.drawable.a5, R.drawable.a6, R.drawable.a7, R.drawable.a8, R.drawable.a9};
List<Integer> itemList = new ArrayList<>(Arrays.asList(str));
List<Integer> actualList = new ArrayList<>(Arrays.asList(str));
RelativeLayout layout;
PuzzleGridAdapter adapter;
Toolbar toolbar;
public PuzzleGameFragment() {
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.puzzle_game_dialog, container, false);
toolbar = (Toolbar) rootView.findViewById(R.id.toolbar);
toolbar.setTitle(R.string.puzzle);
//toolbar.setBackgroundColor(getResources().getColor(R.color.colorPrimary));
((AppCompatActivity) getActivity()).setSupportActionBar(toolbar);
ActionBar actionBar = ((AppCompatActivity) getActivity()).getSupportActionBar();
if (actionBar != null) {
actionBar.setDisplayHomeAsUpEnabled(true);
actionBar.setHomeButtonEnabled(true);
actionBar.setHomeAsUpIndicator(android.R.drawable.ic_menu_close_clear_cancel);
}
setHasOptionsMenu(true);
return rootView;
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
layout = (RelativeLayout) view.findViewById(R.id.puzzleLayout);
recyclerView = (RecyclerView) view.findViewById(R.id.gridItems);
adapter = new PuzzleGridAdapter(getActivity(), this);
recyclerView.setHasFixedSize(true);
Collections.shuffle(itemList);
adapter.getItemList(itemList);
recyclerView.setAdapter(adapter);
recyclerView.setLayoutManager(new GridLayoutManager(getActivity(), 3));
ItemTouchHelper.Callback callback = new SimpleItemTouchHelperCallback(adapter);
mItemTouchHelper = new ItemTouchHelper(callback);
mItemTouchHelper.attachToRecyclerView(recyclerView);
recyclerView.setItemAnimator(new DefaultItemAnimator() {
@Override
public void onAnimationFinished(RecyclerView.ViewHolder viewHolder) {
for (Integer s : adapter.getUpdateList()) {
Log.e("Final List", s + "");
}
int j = 0;
for (int i = 0; i < adapter.getUpdateList().size(); i++) {
Log.e("ItemList", itemList.get(i) + " ");
if (adapter.getUpdateList().get(i).equals(actualList.get(i))) {
j++;
}
}
if (j == adapter.getUpdateList().size()) {
Log.e("Solved", "True");
}
}
});
}
@Override
public void onStartDrag(RecyclerView.ViewHolder viewHolder) {
mItemTouchHelper.startDrag(viewHolder);
}
@Override
public void onResume() {
super.onResume();
Calendar globalCalendar = Calendar.getInstance();
int timeOfDay = globalCalendar.get(Calendar.HOUR_OF_DAY);
if (timeOfDay >= 0 && timeOfDay < 12) {
layout.setBackground(getResources().getDrawable(R.drawable.gradient_morning_background));
toolbar.setBackgroundColor(getResources().getColor(R.color.colorPrimaryMorning));
} else {
layout.setBackground(getResources().getDrawable(R.drawable.gradient_background));
toolbar.setBackgroundColor(getResources().getColor(R.color.colorPrimary));
}
}
@NonNull
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
Dialog dialog = super.onCreateDialog(savedInstanceState);
dialog.getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));
dialog.getWindow().requestFeature(Window.FEATURE_NO_TITLE);
return dialog;
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
menu.clear();
getActivity().getMenuInflater().inflate(R.menu.main_menu, menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == android.R.id.home) {
// handle close button click here
Handler handler = new Handler();
handler.post(new Runnable() {
@Override
public void run() {
getActivity().getSupportFragmentManager().popBackStack();
}
});
return true;
}
return super.onOptionsItemSelected(item);
}
}
以下是fragment_c.xml：
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="true"
android:orientation="vertical">
<RelativeLayout
android:id="@+id/puzzleLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="@+id/toolbarLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/AppTheme.AppBarOverlay"
app:elevation="0dp">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="@style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@+id/toolbarLayout">
<ImageView
android:layout_width="200dp"
android:layout_height="200dp"
android:adjustViewBounds="true"
android:alpha="0.5"
android:scaleType="fitXY"
android:src="@drawable/background_img" />
<ImageView
android:layout_width="200dp"
android:layout_height="200dp"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:adjustViewBounds="true"
android:alpha="0.5"
android:rotation="180"
android:scaleType="fitXY"
android:src="@drawable/background_img" />
<android.support.v7.widget.RecyclerView
android:id="@+id/gridItems"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_margin="25dp" />
</RelativeLayout>
</RelativeLayout>
</android.support.v7.widget.CardView>
为什么Fragment C不可见？