Question

我必须将我从数据库获取的回收站视图项传递给另一个片段。

public class FragLoad extends Fragment {
EditText g_type;
EditText l_capacity, date, quotation;
Button search;
RecyclerView recyclerView;
List<RPostLoad> rPostLoads;
SupportPlaceAutocompleteFragment source,destination;
private static final String URL_RecyclerLoad="http://192.168.43.38/internship_project/android_web_services/RecyclerLoad.php";

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.frag_load, container, false);
    g_type=view.findViewById(R.id.goodstype);
    l_capacity=view.findViewById(R.id.loadCap);
    date=view.findViewById(R.id.txtDate);
    quotation=view.findViewById(R.id.txtQuotations);
    search=view.findViewById(R.id.postSearch);
    recyclerView=view.findViewById(R.id.rvload);
    recyclerView.setLayoutManager(new LinearLayoutManager(this.getActivity()));
    recyclerView.setHasFixedSize(true);
    rPostLoads=new ArrayList<>();

    source= (SupportPlaceAutocompleteFragment) getChildFragmentManager().findFragmentById(R.id.place_autocomplete_fragment2);
    destination= (SupportPlaceAutocompleteFragment) getChildFragmentManager().findFragmentById(R.id.place_autocomplete_fragment1);

    search.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            rvLoad();
        }
    });
    return view;

}
private void rvLoad() {
    Map<String, String> params = new HashMap<>();
    params.put("g_type", g_type.getText().toString());
    AndroidNetworking.post("http://192.168.43.38/internship_project/android_web_services/RecyclerLoad.php").addBodyParameter(params).setTag("Login").setPriority(Priority.LOW).build().getAsJSONObject(new JSONObjectRequestListener() {
        @Override
        public void onResponse(JSONObject response) {
            try {
                Log.d("TAG", "Response" + response.toString());
                JSONArray array=response.getJSONArray("Data");
                for (int i=0;i<array.length();i++){
                    JSONObject product=array.getJSONObject(i);
                    rPostLoads.add(new RPostLoad(
                            product.getString("owner_name"),
                            product.getString("g_type"),
                            product.getString("truck_cap")
                    ));
                }
                RPostLoadAdp adp=new RPostLoadAdp(getActivity(),rPostLoads);
                recyclerView.setAdapter(adp);
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }

        @Override
        public void onError(ANError anError) {
            Toast.makeText(getActivity(), "Server time out please try          later", Toast.LENGTH_SHORT).show();
        }

    });
  }
  }

上面的代码是从我从数据库获取回收器项目的类，需要将回收器视图项发送到另一个片段。问题是我是android的初学者所以我不知道如何发送它。我必须收到回收商项目的片段是空的，所以我没有在这里发布。

Answer 1

您有一个Activity一个Fragment和一个RecyclerView

和yor Activity打开Fragment并在片段内部实施RecylcerView

要在Activity和RecyclerView之间进行沟通，您需要Listener

创建此Interface（监听器）：

public interface OnSomeThingHappens {
    public void onEvent(); // you can use some argument for the method
}

然后在你的Activity中实现接口并为你的片段创建一个方法，将侦听器从activity传递给片段，然后将它从片段传递给RecyclerView的适配器。你的活动将是这样的事情：

public class ActivityMain extends AppCompatActivity  implements OnSomeThingHappens{

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        YourFragment yourFragment = (YourFragment) getFragmentManager().findFragmentById(R.id.test_fragment);
        yourFragment.setOnSomeThingListener(this); // this indication the listener that is implemented in ActivityMain
    }

    @Override
    public void onEvent() {
        // to do your logic 
    }
}

并在Fragment中实现RPostLoadAdp时，使用适配器中的setter方法将侦听器对象适配器发送到适配器。

然后您将有权访问侦听器，并且在您需要时可以调用onEvent()侦听器方法，并在ActivityMain中调用该方法。现在，您可以在ActivityMain中的此方法中执行逻辑（将一些数据发送到其他片段或..）希望这有帮助。

将回收物项从一个片段传递到另一个片段

1 个答案: