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조각이있는 활동이 있으며, 이것을 FirstFragment이라고합시다. 이 단편에는 다른 단편 인 SecondFragment을 포함하는 프레임 작성이 있습니다. SecondFragment을 클릭하면 ThirdFragment가 해고됩니다. 다시 버튼을 누를 때 SecondFragment으로 돌아갈 수 있어야합니다. 그러나 뒤로 버튼을 클릭하면 활동이 닫힙니다. 여기에 내 코드입니다 :내부 조각에서 뒷면이 작동하지 않습니다.
MainActivity.java
public class MainActivity extends AppCompatActivity{
ViewPager viewPager;
String[] titles;
SecondFragment secondFragment;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
FragmentPagerAdapter fragment = new FragmentPagerAdapter(getSupportFragmentManager());
viewPager = findViewById(R.id.viewPager);
viewPager.setAdapter(fragment);
firstFragment = new FirstFragment();
}
public class FragmentPagerAdapter extends android.support.v4.app.FragmentPagerAdapter {
public FragmentPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
switch (position) {
case 0 : return FirstFragment.newInstance("hi");
default: return new OtherFragment();
}
}
@Override
public int getCount() {
return 3;
}
}
@Override
public void onBackPressed() {
if (getFragmentManager().getBackStackEntryCount() > 0) {
getFragmentManager().popBackStack();
} else {
super.onBackPressed();
}
}
}
FirstFragment.java
public class FirstFragment extends Fragment implements RecyclerViewListener {
public FirstFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
Fragment secondFragment =SecondFragment.newInstance("hi");
FragmentTransaction transaction = getChildFragmentManager().beginTransaction();
transaction.replace(R.id.frameLayout, secondFragment).commit();
return inflater.inflate(R.layout.fragment_first, container, false);
}
public static FirstFragment newInstance(String text) {
FirstFragment f = new FirstFragment();
Bundle b = new Bundle();
b.putString("msg", text);
f.setArguments(b);
return f;
}
@Override
public void clicked(int position) {
Fragment productDetailFragment = ThirdFragment.newInstance(position);
FragmentTransaction transaction = getChildFragmentManager().beginTransaction();
transaction.add(R.id.frameLayout, productDetailFragment).addToBackStack(null).commit();
Toast.makeText(getContext(), "pos : " + position, Toast.LENGTH_SHORT).show();
}
@Override
public boolean longClicked(int position) {
return false;
}
}
SecondFragment.java
public class SecondFragment extends Fragment {
RecyclerView recyclerView;
static ArrayList<Item> items;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_second, container, false);
recyclerView = v.findViewById(R.id.recyclerView);
recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
items = new ArrayList<>();
for (int i = 0; i < 100; i++) {
Item item = new Item(R.drawable.accept_state, "esm" + i, Integer.toString(i * 100));
items.add(item);
}
recyclerView.setAdapter(new RecylcerViewAdapter(getContext(), (RecyclerViewListener) getParentFragment(), items));
return v;
}
public static SecondFragment newInstance(String text) {
SecondFragment f = new SecondFragment();
Bundle b = new Bundle();
b.putString("msg", text);
f.setArguments(b);
return f;
}
}
ThirdFragment.java
public class ThirdFragment extends android.support.v4.app.Fragment {
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_third, container, false);
return v;
}
public static ThirdFragment newInstance(int position) {
ThirdFragment f = new ThirdFragment();
Bundle b = new Bundle();
f.setArguments(b);
return f;
}
}
RecyclerViewListener.java
public interface RecyclerViewListener {
void clicked(int position);
boolean longClicked(int position);
}
RecyclerViewAdapter.java 모든
public class RecylcerViewAdapter extends RecyclerView.Adapter<RecylcerViewAdapter.RecyclerViewHolder>{
private Context context;
private RecyclerViewListener recyclerViewListener;
private ArrayList<Item> items;
public RecylcerViewAdapter(Context context, RecyclerViewListener recyclerViewListener, ArrayList<Item> items) {
this.context = context;
this.recyclerViewListener = recyclerViewListener;
this.items = items;
}
@Override
public RecyclerViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(context).inflate(R.layout.recycler_item, parent, false);
RecyclerViewHolder recyclerViewHolder = new RecyclerViewHolder(view);
return recyclerViewHolder;
}
@Override
public void onBindViewHolder(RecyclerViewHolder holder, int position) {
holder.bind(position);
}
@Override
public int getItemCount() {
return items.size();
}
public class RecyclerViewHolder extends RecyclerView.ViewHolder {
ImageView imageView;
TextView name;
TextView cost;
public RecyclerViewHolder(View itemView) {
super(itemView);
itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
recyclerViewListener.clicked(getAdapterPosition());
}
});
itemView.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View view) {
return recyclerViewListener.longClicked(getAdapterPosition());
}
});
imageView = itemView.findViewById(R.id.image);
name = itemView.findViewById(R.id.name);
cost = itemView.findViewById(R.id.cost);
}
public void bind(int position) {
Item item = items.get(position);
imageView.setImageResource(item.getImageID());
name.setText(item.getName());
cost.setText(item.getCost());
}
}
}