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我得到一个错误@Override，它是说我必须重写或实现一个超类型。@Override必须覆盖或实现一个超类型
这是我的代码，并且给我错误的位是protected void onNewIntent（意图intent）。
由于
public class CartListActivity extends ListActivity {
public class ProductListAdapter extends BaseAdapter {
@Override
protected void onNewIntent(Intent intent) {
String query = "";
if (Intent.ACTION_SEARCH.equals(intent.getAction())) {
//use the query to search your data
query = intent.getStringExtra(SearchManager.QUERY);
}
int catId = intent.getIntExtra(MainActivity.SELECTED_CATEGORY, 0);
if (catId != 0)
categoryId = catId;
loader = new ListViewLoader(adapter, categoryId);
if (query.length() > 0) {
loader.execute(String.format(MainActivity.WEBSERVER_GETLIST + "q=%s", categoryId, query));
}
else {
loader.execute(String.format(MainActivity.WEBSERVER_GETLIST, categoryId));
}
}
private final Context context;
private List<Product> itemList;
public List<Product> getItemList() {
return itemList;
}
public void setItemList(List<Product> itemList) {
this.itemList = itemList;
}
public Context getContext() {
return context;
}
public ProductListAdapter(Context c) {
context = c;
}
@Override
public int getCount() {
if(itemList == null) return 0;
else return itemList.size();
}
@Override
public Object getItem(int position) {
if (itemList == null) return null;
else return itemList.get(position);
}
@Override
public long getItemId(int position) {
if (itemList == null) return 0;
else return itemList.get(position).hashCode();
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View cell = convertView;
if (cell == null) {
// get layout from mobile xml
LayoutInflater inflater = ((Activity)context).getLayoutInflater();
cell = inflater.inflate(R.layout.adapter_product_list, parent, false);
}
Product p = itemList.get(position);
//set value into textview according to position
TextView textView = (TextView) cell.findViewById(R.id.product_title);
textView.setText(p.getProductName());
// add £ symbol
textView = (TextView) cell.findViewById(R.id.product_info);
textView.setText("Price: " + "£"+ p.getPrice());
//set value into imageview according to position
ImageView imgView = (ImageView) cell.findViewById(R.id.product_image);
// clear the image
imgView.setImageDrawable(null);
//and load from the network
p.loadImage(imgView, 54, 54);
return cell;
}
}
public static final Integer[] productIcons = {
0, // index 0 is empty
R.drawable.books,
R.drawable.films,
R.drawable.music,
R.drawable.games,
};
private int categoryId;
private ProductListAdapter adapter;
private ListViewLoader loader;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// get the category from the intent
Intent intent = getIntent();
categoryId = intent.getIntExtra(MainActivity.SELECTED_CATEGORY, 0);
adapter = new ProductListAdapter(this);
setListAdapter(adapter);
// Show the Up button in the action bar.
setupActionBar();
loader = new ListViewLoader(adapter, categoryId);
loader.execute(String.format(MainActivity.WEBSERVER_GETLIST, categoryId));
}
/**
* Set up the {@link android.app.ActionBar}.
*/
private void setupActionBar() {
getActionBar().setDisplayHomeAsUpEnabled(true);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.product_list, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.show_cart:
//create the intent for the cart activity
Intent intent = new Intent(getApplicationContext(), CartActivity.class);
startActivity(intent);
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
//create an intent
Intent intent = new Intent(this, ProductActivity.class);
Product p = (Product)adapter.getItem(position);
//specify the extra parameters we want to pass
intent.putExtra(MainActivity.SELECTED_CATEGORY, p.getCategoryId());
intent.putExtra(MainActivity.SELECTED_PRODUCTID, p.getProductId());
intent.putExtra(MainActivity.SELECTED_PRODUCTNAME, p.getProductName());
intent.putExtra(MainActivity.SELECTED_PRODUCTPRICE, p.getPrice());
intent.putExtra(MainActivity.SELECTED_SUITABLEFORKIDS, p.getSuitableForKids());
startActivity(intent);
}
}
我试过了，错误消失了，但是我试图实现的搜索功能并没有回退任何结果。谢谢 – user3070626
将公共方法添加到适配器并从活动中的NewIntent方法传输结果:)如果标记帮助您，请将其标记为正确 – SalGad