Я создаю приложение для Android, в котором я буду отображать фотографии в макете вкладки.Требование должно быть не более 20 фотографий на каждой вкладке.Как отобразить фотографии на вкладке?Я использую viewpager и мой текущий код.Кстати, это сайт, который я использовал для своих данных: https://jsonplaceholder.typicode.com/photos
Спасибо!
Адаптер:
public class PhotoAdapter extends RecyclerView.Adapter<PhotoAdapter.MyViewHolder> {
private Context mContext;
List<Photos> photosList = new ArrayList<>();
public PhotoAdapter(Context mContext, List<Photos> photosList){
this.photosList = photosList;
this.mContext = mContext;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext())
.inflate(R.layout.photo_card, viewGroup, false);
return new MyViewHolder(view);
}
@Override
public void onBindViewHolder(MyViewHolder myViewHolder, int i) {
Photos photos = photosList.get(i);
Log.i("Position: ", i+1 + " Id: " + photos.getId());
myViewHolder.mTitleTextView.setText(photos.getTitle());
myViewHolder.mIdTextView.setText(photos.getId());
String thumbnail = photos.getUrl();
Glide.with(mContext)
.load(thumbnail)
.into(myViewHolder.mUrlImageView);
}
@Override
public int getItemCount() {
//return photosList.size();
return 20;
}
public class MyViewHolder extends RecyclerView.ViewHolder{
public TextView mTitleTextView, mIdTextView;
ImageView mUrlImageView;
public MyViewHolder(@NonNull View itemView) {
super(itemView);
mTitleTextView = (TextView) itemView.findViewById(R.id.titleTextView);
mIdTextView = (TextView) itemView.findViewById(R.id.idTextView);
mUrlImageView = (ImageView) itemView.findViewById(R.id.photoImageView);
}
}
Фрагмент: (Динамический)
public class DyanamicFragment extends Fragment {
private RecyclerView mRecyclerView;
public List<Photos> photos = new ArrayList<>();
public static DyanamicFragment newInstance(){
return new DyanamicFragment();
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.dynamic_fragment_layout, container, false);
initViews(view);
mRecyclerView = (RecyclerView) view.findViewById(R.id.PhotosRecyclerView);
mRecyclerView.setLayoutManager(new GridLayoutManager(getActivity(),4));
return view;
}
private void initViews(View view) {
TextView textView = view.findViewById(R.id.commonTextView);
textView.setText(String.valueOf("Category: " +getArguments().getInt("position")));
loadJSON();
}
private void loadJSON(){
Service serviceAPI = Client.getClient();
Call<JsonArray> loadPhotosCall = serviceAPI.readPhotosArray();
loadPhotosCall.enqueue(new Callback<JsonArray>() {
@Override
public void onResponse(Call<JsonArray> call, Response<JsonArray> response) {
try {
String photosString = response.body().toString();
Type listType = new TypeToken<List<Photos>>() {}.getType();
photos = getPhotosListFromJson(photosString, listType);
mRecyclerView.setItemAnimator(new DefaultItemAnimator());
mRecyclerView.setAdapter(new PhotoAdapter(getContext(), photos));
}catch (Exception e){
Log.d("onResponse", "There is an error");
e.printStackTrace();
}
}
@Override
public void onFailure(Call<JsonArray> call, Throwable t) {
}
});
}
public static <T> List<T> getPhotosListFromJson(String jsonString, Type type){
if (!isValid(jsonString)){
return null;
}
return new Gson().fromJson(jsonString, type);
}
public static boolean isValid(String json){
try {
new JsonParser().parse(json);
return true;
}catch (JsonSyntaxException jse){
return false;
}
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
@Override
public void onAttach(Context context) {
super.onAttach(context);
}
@Override
public void onPause() {
super.onPause();
}
@Override
public void onResume() {
super.onResume();
}
@Override
public void onStop() {
super.onStop();
}
@Override
public void onDestroyView() {
super.onDestroyView();
}
@Override
public void onDestroy() {
super.onDestroy();
}
}
Активность:
public class MainActivity extends AppCompatActivity {
private ViewPager viewPager;
private TabLayout mTabLayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
}
private void initView() {
viewPager = findViewById(R.id.viewpager);
mTabLayout = findViewById(R.id.tabs);
viewPager.setOffscreenPageLimit(5);
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(mTabLayout));
mTabLayout.setOnTabSelectedListener(new TabLayout.BaseOnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
setDynamicFragmentToTabLayout();
}
private void setDynamicFragmentToTabLayout() {
for (int i = 1; i < 6; i++) {
if (i == 1){
mTabLayout.addTab(mTabLayout.newTab().setText("Photos: 1-20"));
}
if (i == 2){
mTabLayout.addTab(mTabLayout.newTab().setText("Photos: 21-40"));
}
if (i == 3){
mTabLayout.addTab(mTabLayout.newTab().setText("Photos: 41-60"));
}
if (i == 4){
mTabLayout.addTab(mTabLayout.newTab().setText("Photos: 61-80"));
}
if (i == 5){
mTabLayout.addTab(mTabLayout.newTab().setText("Photos: 81-100"));
}
}
DynamicFragmentAdapter mDynamicFragmentAdapter = new DynamicFragmentAdapter(getSupportFragmentManager(), mTabLayout.getTabCount());
viewPager.setAdapter(mDynamicFragmentAdapter);
viewPager.setCurrentItem(0);
}
}