我是新來的Java,發現有點晚,我不能從一個以上的類導入ArrayList
。無法從兩個類導入Arraylist ...現在怎麼辦?
建立它只有一個類(BlackLabel
)和CustomAdapter
工作正常。現在我想添加第二個品牌(Castle
),但我發現我只能導入一個靜態。也許你們可以如此善良,並以另一種方式幫助我添加多個品牌來使用相同的適配器。
這裏是我的適配器:(剛開始)
import static com.example.android.sab.BlackLabel.modelArrayList;
//import static com.example.android.sab.CastleLager.modelArrayList;
/**
* Created by Carel on 2017/08/15.
*/
public class CustomAdapter extends RecyclerView.Adapter<CustomAdapter.MyViewHolder> {
private LayoutInflater inflater;
private Context ctx;
public CustomAdapter(Context ctx) {
inflater = LayoutInflater.from(ctx);
this.ctx = ctx;
}
@Override
public CustomAdapter.MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = inflater.inflate(R.layout.rv_item, parent, false);
MyViewHolder holder = new MyViewHolder(view);
return holder;
}
@Override
public void onBindViewHolder(final CustomAdapter.MyViewHolder holder, int position) {
holder.tvBrand.setText((CharSequence) modelArrayList.get(position).getBrand());
holder.tvCases.setText(String.valueOf(modelArrayList.get(position).getNumber()));
holder.tvPallet_size.setText(String.valueOf(modelArrayList.get(position).getPallet_size()));
holder.tvCases.setText(String.valueOf(modelArrayList.get(position).getNumber2()));
holder.tvPallets.setText(String.valueOf(modelArrayList.get(position).getNumber()));
holder.tvCases.setText(String.valueOf(modelArrayList.get(position).getNumber2()));
}
這裏是BlackLabel中國社會科學院這是第一個:
import java.util.ArrayList;
//import static com.example.android.sab.CastleLager.modelArrayList;
public class BlackLabel extends brands {
private RecyclerView recyclerView;
//private String modelArrayList;
//private Context ctx;
public static ArrayList<Model> modelArrayList;
private CustomAdapter customAdapter;
//private Button btnnext;
public String[] brandlist = new String[] {
"Black Label 340ml NRB (85023)",
"Black Label 330ml Cans (85736)",
"Black label 500ml Cans (85023)",
"Black Label 440ml NRB (86798)",
"Black Label 330ml RB (85556)",
"Black Label 750ml RB (85021)",
"Black Label 340ml NRB 12 Pack (87009)",
"Black Label 500ml Cans 12 Pack (85022)"
};
public int[] pallet_size = {84, 127, 81, 80, 120, 70, 132, 90};
//int palletsize = Integer.parseInt(String.valueOf(pallet_size));
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.order_by_brand);
setTitle("Black Label");
recyclerView = (RecyclerView) findViewById(R.id.recycler);
//btnnext = (Button) findViewById(R.id.next);
modelArrayList = getModel();
customAdapter = new CustomAdapter(this);
recyclerView.setAdapter(customAdapter);
recyclerView.setLayoutManager(new LinearLayoutManager(getApplicationContext(), LinearLayoutManager.VERTICAL, false));
}
private ArrayList<Model> getModel() {
ArrayList<Model> list = new ArrayList<>();
for (int i = 0; i < 8; i++) {
Model model = new Model();
model.setNumber(0);
model.setNumber2(0);
model.setBrand(brandlist[i]);
model.setPallet_size(pallet_size[i]);
list.add(model);
}
return list;
}
}
,現在我想用一個ArrayList從第二等級:
public class CastleLager extends brands {
private RecyclerView recyclerView;
//private String modelArrayList;
//private Context ctx;
public static ArrayList<Model> modelArrayList;
private CustomAdapter customAdapter;
//private Button btnnext;
public String[] castlebrandlist = new String[] {
"Castle Lager 340ml NRB (85023)",
"Castle Lager 330ml Cans (85736)",
"Castle Lager 500ml Cans (85023)",
"Castle Lager 440ml NRB (86798)",
"Castle Lager 330ml RB (85556)",
"Castle Lager 750ml RB (85021)",
"Castle Lager 340ml NRB 12 Pack (87009)",
"Castle Lager 500ml Cans 12 Pack (85022)"
};
}
我知道它可能是非常基本的,但正如我所說,我是非常新的Java和不能等我的頭在哪裏開始。謝謝。
您只能導入一個,而您必須爲另一個導入完全限定的名稱,例如'holder.tvBrand.setText((CharSequence)com.example.android.sab.CastleLager.modelArrayList.get(position).getBrand());' –
或者只是導入類,並使用'Class.field'語法EG: 'CastleLager.modelArrayList' ... –
談論命名:閱讀Java命名約定。類名始終以大寫字母開頭。所以'延伸品牌'聽起來也是錯誤的。 – GhostCat