Ниже мой ProductListAdapter:
public class ProductListAdapter extends PagedListAdapter<Products, ProductListAdapter.ProductViewHolder> {
private static final String TAG = "ProductListAdapter";
// Class member variables for adapter
private Context mContext;
private List<Integer> mProductIdList = new ArrayList<>();
// An instance of bottomSheetBehaviour
private BottomSheetBehavior mBottomSheetBehavior;
private int mCompanyId;
private String mToken;
private HashMap<String, String> mHeader;
private View mParentView;
private ProgressDialog mProgressDialog;
public ProductListAdapter(Context context) {
super(DIFF_CALLBACK);
mContext = context;
mParentView = ((Activity)mContext).getWindow().getDecorView().getRootView();
}
@NonNull
@Override
public ProductViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(mContext).inflate(R.layout.product_item, parent,false);
mHeader = new HashMap<>();
mCompanyId = SharedPrefManager.getInstance(mContext).getUserCompanyId();
mToken = SharedPrefManager.getInstance(mContext).getUserToken();
mHeader.put(mContext.getString(R.string.key_authorization), " Bearer "+ mToken);
mProgressDialog = new ProgressDialog(mContext);
mProgressDialog.setTitle(null);
mProgressDialog.setMessage(mContext.getString(R.string.text_please_wait));
mProgressDialog.setCanceledOnTouchOutside(false);
return new ProductViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull final ProductViewHolder holder, int position) {
final Products mProduct = getItem(position);
if(mProduct != null){
// setting data from db to views
holder.mBatchNumber.setText("#" + mProduct.getBatch_number());
holder.mProductName.setText(mProduct.getProduct_name());
holder.mProductPrice.setText("Price: " + mProduct.getUnit_selling_price());
holder.mProductQty.setText("Quantity: " + mProduct.getQuantity_available() +"/"+ mProduct.getReference_quantity());
holder.mProductStatus.setText(mProduct.getProduct_availability().toLowerCase());
holder.mCategory.setText(mProduct.getCategory());
}
}
private static DiffUtil.ItemCallback<Products> DIFF_CALLBACK =
new DiffUtil.ItemCallback<Products>() {
@Override
public boolean areItemsTheSame(@NonNull Products oldItem, @NonNull Products newItem) {
return oldItem.getProduct_id() == newItem.getProduct_id();
}
@Override
public boolean areContentsTheSame(@NonNull Products oldItem, @NonNull Products newItem) {
return oldItem.equals(newItem);
}
};
}
public class ProductViewHolder extends RecyclerView.ViewHolder{
private AppCompatTextView mBatchNumber,mProductName,mProductQty,mProductPrice,mProductStatus,
mCategory;
private ImageButton mMenuButton;
private ProgressBar mProgressBar;
public ProductViewHolder(@NonNull View itemView) {
super(itemView);
// getting reference to views
mBatchNumber = itemView.findViewById(R.id.mBatchNumber);
mProductName = itemView.findViewById(R.id.mProductName);
mProductPrice = itemView.findViewById(R.id.mProductPrice);
mProductQty = itemView.findViewById(R.id.mProductQty);
mProductStatus = itemView.findViewById(R.id.mProductStatus);
mCategory = itemView.findViewById(R.id.mCategory);
mMenuButton = itemView.findViewById(R.id.mMenuButton);
mProgressBar = itemView.findViewById(R.id.mProgressBar);
}
}
Это мой ProductDataSource класс:
public class ProductDataSource extends PageKeyedDataSource<Integer, Products> {
private static final String TAG = ProductDataSource.class.getSimpleName();
private Context mContext;
private static final int FIRST_PAGE = 1;
public static int PAGE_SIZE = 20;
private int mCompanyId;
private String mToken;
private HashMap<String, String> mHeader;
private SwipeRefreshLayout mSwipeRefreshLayout;
private MutableLiveData networkState;
private MutableLiveData initialLoading;
public ProductDataSource(Context context, SwipeRefreshLayout swipeRefreshLayout) {
mContext = context;
mSwipeRefreshLayout = swipeRefreshLayout;
mHeader = new HashMap<>();
mCompanyId = SharedPrefManager.getInstance(mContext).getUserCompanyId();
mToken = SharedPrefManager.getInstance(mContext).getUserToken();
mHeader.put(mContext.getString(R.string.key_authorization), " Bearer "+ mToken);
networkState = new MutableLiveData();
initialLoading = new MutableLiveData();
}
public MutableLiveData getNetworkState() {
return networkState;
}
public MutableLiveData getInitialLoading() {
return initialLoading;
}
@Override
public void loadInitial(@NonNull final LoadInitialParams<Integer> params, @NonNull final LoadInitialCallback<Integer, Products> callback) {
mSwipeRefreshLayout.setRefreshing(true);
// making http call
RetrofitClient.getInstance()
.getApi()
.getPaginatedProductsList(mHeader, mCompanyId, FIRST_PAGE)
.enqueue(new Callback<ProductListResponse>() {
@Override
public void onResponse(Call<ProductListResponse> call, Response<ProductListResponse> response) {
if(response.body() != null){
// load next page
callback.onResult(response.body().getProducts(),null,FIRST_PAGE + 1);
Log.d(TAG, "LoadInitial Key: " + FIRST_PAGE);
}
mSwipeRefreshLayout.setRefreshing(false);
}
@Override
public void onFailure(Call<ProductListResponse> call, Throwable t) {
Log.d(TAG, "Error: "+ t.getMessage());
}
});
}
@Override
public void loadBefore(@NonNull final LoadParams<Integer> params, @NonNull final LoadCallback<Integer, Products> callback) {
mSwipeRefreshLayout.setRefreshing(true);
Log.d(TAG, "loadBefore refresh layout started...");
// making http call
RetrofitClient.getInstance()
.getApi()
.getPaginatedProductsList(mHeader, mCompanyId, params.key)
.enqueue(new Callback<ProductListResponse>() {
@Override
public void onResponse(Call<ProductListResponse> call, Response<ProductListResponse> response) {
if(response.body() != null){
// get previous page key
Integer key = (params.key > 1) ? params.key - 1 : null;
// load previous page
callback.onResult(response.body().getProducts(), key);
Log.d(TAG, "LoadBefore Key: " + key);
}
mSwipeRefreshLayout.setRefreshing(false);
Log.d(TAG, "loadBefore refresh layout stopped...");
}
@Override
public void onFailure(Call<ProductListResponse> call, Throwable t) {
Log.d(TAG, "Error: "+ t.getMessage());
}
});
}
@Override
public void loadAfter(@NonNull final LoadParams<Integer> params, @NonNull final LoadCallback<Integer, Products> callback) {
// making http call
RetrofitClient.getInstance()
.getApi()
.getPaginatedProductsList(mHeader, mCompanyId, params.key)
.enqueue(new Callback<ProductListResponse>() {
@Override
public void onResponse(Call<ProductListResponse> call, Response<ProductListResponse> response) {
if(response.body() != null){
// if has_more_page is true then increment the key else null
Integer key = response.body().isHas_more_pages() ? params.key + 1 : null;
// load next page if there are any
callback.onResult(response.body().getProducts(), key);
Log.d(TAG, "LoadAfter Key: " + key);
}
}
@Override
public void onFailure(Call<ProductListResponse> call, Throwable t) {
Log.d(TAG, "Error: "+ t.getMessage());
}
});
}
}
Мой ProductDataSourceFactory класс:
public class ProductDataSourceFactory extends DataSource.Factory {
//private MutableLiveData<PageKeyedDataSource<Integer, Products>> mProductLiveDataSource = new MutableLiveData<>();
private MutableLiveData<ProductDataSource> mProductLiveDataSource = new MutableLiveData<>();
private Context mContext;
ProductDataSource mProductDataSource;
private SwipeRefreshLayout mSwipeRefreshLayout;
public ProductDataSourceFactory(Context context, SwipeRefreshLayout swipeRefreshLayout) {
mContext = context;
mSwipeRefreshLayout = swipeRefreshLayout;
}
@NonNull
@Override
public DataSource create() {
mProductDataSource = new ProductDataSource(mContext, mSwipeRefreshLayout);
mProductLiveDataSource.postValue(mProductDataSource);
return mProductDataSource;
}
public MutableLiveData<ProductDataSource> getProductLiveDataSource() {
return mProductLiveDataSource;
}
}
Ниже мой ProductViewModel класс:
public class ProductViewModel extends ViewModel{
public LiveData<PagedList<Products>> productPagedList;
//LiveData<PageKeyedDataSource<Integer, Products>> liveDataSource;
LiveData<ProductDataSource> liveDataSource;
public static final int PAGE_SIZE = 20;
private ProductDataSourceFactory mProductDataSourceFactory;
private Context mContext;
private SwipeRefreshLayout mSwipeRefreshLayout;
ProductDao mProductDao;
public ProductViewModel() {}
public void initData(Context mContext, SwipeRefreshLayout swipeRefreshLayout){
this.mContext = mContext;
this.mSwipeRefreshLayout = swipeRefreshLayout;
mProductDataSourceFactory = new ProductDataSourceFactory(mContext, mSwipeRefreshLayout);
liveDataSource = mProductDataSourceFactory.getProductLiveDataSource();
PagedList.Config mConfig =
(new PagedList.Config.Builder())
.setEnablePlaceholders(false)
.setPrefetchDistance(5)
.setPageSize(ProductDataSource.PAGE_SIZE)
.build();
productPagedList = (new LivePagedListBuilder(mProductDataSourceFactory, mConfig))
.build();
}
public void refresh() {
mProductDataSourceFactory.getProductLiveDataSource().getValue().invalidate();
}
}
И, наконец, мой ProductListActivity:
public class ProductListActivity extends AppCompatActivity implements View.OnClickListener{
private static final String TAG = "ProductListActivity";
ConnectivityReceiver mReceiver = new ConnectivityReceiver();
private ActivityProductListBinding bi;
private Toolbar mToolbar;
private AppCompatTextView mToolbarTitle;
private List<Products> mProductsList;
private MaterialSearchView mSearchView;
private ProductListAdapter mProductListAdapter;
// An instance of bottomSheetBehaviour
private BottomSheetBehavior mSheetBehavior;
private static int mCompanyId;
private static HashMap<String, String> mHeader;
private static String mToken;
ProductViewModel mProductViewModel;
private boolean isRefresh = false;
private CustomSpinnerAdapter mSpinnerAdapter;
private List<Product_categories> mCategoriesList;
private ProgressDialog mProgressDialog;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
bi = ActivityProductListBinding.inflate(getLayoutInflater());
setContentView(bi.getRoot());
initViews();
}
//*** initializing views
private void initViews() {
// setting up toolbar
mToolbar = findViewById(R.id.mToolbar);
mToolbar.setTitle("");
mToolbarTitle = findViewById(R.id.mToolbarTitle);
mToolbarTitle.setText(getString(R.string.title_product_list));
setSupportActionBar(mToolbar);
mToolbar.setNavigationIcon(R.drawable.ic_back_white);
mToolbar.setNavigationOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
navigateBack();
}
});
mProductsList = new ArrayList<>();
mCategoriesList = new ArrayList<>();
// attaching on click listener
bi.mAddButton.setOnClickListener(this);
// setting up recycler view
bi.mRecyclerView.setHasFixedSize(true);
bi.mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
bi.mRecyclerView.setItemAnimator(new SlideInUpAnimator());
mProductViewModel = new ViewModelProvider(this).get(ProductViewModel.class);
//mProductViewModel.initData(this, bi.mRefreshLayout, mProductDatabase.productDao());
mProductViewModel.initData(this, bi.mRefreshLayout);
final ProductListAdapter mAdapter = new ProductListAdapter(this);
mProductViewModel.productPagedList.observe(this, new Observer<PagedList<Products>>() {
@Override
public void onChanged(PagedList<Products> product) {
//refresh current list
mAdapter.submitList(product);
}
});
// setting recycler adapter to recycler view
bi.mRecyclerView.setAdapter(mAdapter);
// setting color scheme loading layout
bi.mRefreshLayout.setColorSchemeResources(
R.color.colorPrimary, R.color.niceDark,
R.color.dark_yellow, R.color.colorAccent
);
// adding refresh listener
bi.mRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
// refresh adapter
mProductViewModel.refresh();
bi.mRefreshLayout.setRefreshing(false);
}
});
mProgressDialog = new ProgressDialog(this);
mProgressDialog.setTitle(null);
mProgressDialog.setMessage(getString(R.string.text_please_wait));
mProgressDialog.setCanceledOnTouchOutside(false);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater mInflater = getMenuInflater();
mInflater.inflate(R.menu.menu_filter,menu);
// find menu item
MenuItem mItem = menu.findItem(R.id.menu_search);
// Preparing search view
mSearchView = findViewById(R.id.mSearchView);
mSearchView.setMenuItem(mItem);
mSearchView.setHint(getString(R.string.text_search_product));
mSearchView.setHintTextColor(getResources().getColor(R.color.colorDarkGray));
mSearchView.setBackIcon(getResources().getDrawable(R.drawable.ic_back_green));
mSearchView.setEllipsize(true);
mSearchView.setSubmitOnClick(true);
// Query listener to help in searching
mSearchView.setOnQueryTextListener(new MaterialSearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
// implement search here
return true;
}
@Override
public boolean onQueryTextChange(String newText) {
// implement search here
return true;
}
});
return true;
}
}