在滑动选项卡片段之间传递对象

Question

我有两个片段，在滑动选项卡上使用它，我想将对象从片段(1(传递到片段(2(，该对象来自(Web Service(

该行为负责TABS

   public class ChartActivity extends AppCompatActivity {
private static final String TAG="ChartActivity";
private ViewPager mPager;
private SlidingTabLayout tabLayout;
private Toolbar toolbarChart;
private TextView txtToolbar;
private AdapterTabs adapterTabs;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_chart);
    Log.e(TAG,"starting to Create Chart");
    setupToolBar();
    setupTabs();
}

// setup ToolBar
public void setupToolBar() {
    toolbarChart = (Toolbar) findViewById(R.id.app_bar_chart); // get instance from view
    setSupportActionBar(toolbarChart);  // set Toolbar in supporting ActionBar
    getSupportActionBar().setDisplayShowTitleEnabled(false);
    txtToolbar=(TextView)toolbarChart.findViewById(R.id.toolbar_title);
    txtToolbar.setText("Dashboard");
}
public void setupTabs(){
    tabLayout=(SlidingTabLayout)findViewById(R.id.tabs);
    mPager=(ViewPager)findViewById(R.id.viewPager);
    adapterTabs= new AdapterTabs(this,getSupportFragmentManager());
    mPager.setAdapter(adapterTabs);
    tabLayout.setDistributeEvenly(true);
    tabLayout.setCustomTabColorizer(new SlidingTabLayout.TabColorizer() {
        @Override
        public int getIndicatorColor(int position) {
            return getResources().getColor(R.color.colorAccent);
        }
    });
    tabLayout.setViewPager(mPager);
}
public AdapterTabs getAdapterTabs() {
    return adapterTabs;
}
 }

这个片段(1(

   public class InpatientFragment extends Fragment {

private final static String INPATIENT_STATE="inpatient";
public final static String OutPatient_STATE="outpatient";
private RequestQueue request;
private PieChart chart;
ArrayList<Patient> inpatients;
ArrayList<Patient> outPatient; //outPatient=====> show it in fragment(2)
private ProgressDialog progressDialog;
private VolleySingleton singleton;
private final static String TAG = "InpatientFragment";
public InpatientFragment() {
    // Required empty public constructor
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    progressDialog = new ProgressDialog(getActivity());
    progressDialog.setIndeterminate(true);
    progressDialog.setMessage("Load Data...");
    requsetDatachart();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View layout = inflater.inflate(R.layout.fragment_inpatient, container, false);
    chart = (PieChart) layout.findViewById(R.id.pieChart);
    chart.setCenterTextSize(10);
    chart.setCenterText("Inpatient");
    chart.setDrawEntryLabels(true);
    chart.setHoleRadius(2.5f);
    return layout;
}
@Override
public void onAttach(Context context) {
    super.onAttach(context);
}
private void requsetDatachart() {
    singleton = VolleySingleton.getInstance();
    request = singleton.getRequestQueue();
    progressDialog.show();
    JsonObjectRequest objectRequest = new JsonObjectRequest(Request.Method.GET, MyApplication.APP_URL + "api/getOverview", null,
            new Response.Listener<JSONObject>() {
                @Override
                public void onResponse(JSONObject response) {
                    inpatients = PatientParser.parserJsonPatient(response, "INPATIENT", 1);
                    Log.e(TAG, inpatients.size()+"");
                    outPatient=PatientParser.parserJsonPatient(response,"OUTPATIENT",0);
                    addDataToChart(inpatients);
                    progressDialog.dismiss();
                }
            }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            Log.e(TAG, error.getMessage());
            progressDialog.dismiss();
        }
    });
    request.add(objectRequest);
}
public void addDataToChart(List<Patient> patients){
    ArrayList<PieEntry>pieEntries=new ArrayList<>();
    for (int i=0;i<patients.size();i++){
        pieEntries.add(new PieEntry(Float.parseFloat(patients.get(i).getResult_val()),patients.get(i).getName_en()));
    }
    // add color to data set
    ArrayList<Integer> colors=new ArrayList<>();
    colors.add(Color.BLUE);
    colors.add(Color.GREEN);
    colors.add(Color.YELLOW);
    // form data set slicing between containing and size of text
    PieDataSet dataSet=new PieDataSet(pieEntries,"InPatient");
    dataSet.setSliceSpace(3);
    dataSet.setValueTextSize(13);
    dataSet.setColors(colors);
    /// form of chart through legend object
    Legend legend=chart.getLegend();
    legend.setForm(Legend.LegendForm.CIRCLE);
    // set data set to pieData
    PieData data=new PieData(dataSet);
    chart.setData(data);
    chart.invalidate();
}
@Override
public void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    outState.putParcelableArrayList(INPATIENT_STATE,inpatients);
}

 }

和这个片段2我想在此片段中显示对象 门口==> fragment(1(

中的列表

 public class OutpatientFragment extends Fragment {

private final static String TAG = "OutpatientFragment";
private static final String ARG_PARAM1 = "param1";
ArrayList<Patient> outPatient;
private RequestQueue request;
private PieChart chart;
private ProgressDialog progressDialog;
private VolleySingleton singleton;

public OutpatientFragment() {
    // Required empty public constructor
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View layout=inflater.inflate(R.layout.fragment_outpatient, container, false);
    //getArguments().getBundle(InpatientFragment.OutPatient_STATE).getParcelableArrayList();
    chart = (PieChart) layout.findViewById(R.id.pieChart);
    chart.setCenterTextSize(10);
    chart.setCenterText("Outpatient");
    chart.setDrawEntryLabels(true);
    chart.setHoleRadius(2.5f);
    return layout;
}
@Override
public void onResume() {
    super.onResume();
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    progressDialog = new ProgressDialog(getActivity());
    progressDialog.setIndeterminate(true);
    progressDialog.setMessage("Load Data...");
    }

  }

Answer 1

我认为您可以使用EventBus。例如

在InpatientFragment中调用EventBus.getDefault().post(new MessageEvent(<Your object>))接收数据时。

在OutpatientFragment中创建用于接收数据的方法

@Subscribe(threadMode = ThreadMode.MAIN)  
public void onMessageEvent(MessageEvent event) {/* Do something */};