我在活动方法中收到一个胆固醇监测器的数组列表。我正在尝试将其传递到Onpostexecute中的片段中,但是当前它在零列表中传递?在我的on Create中。
cholesterol_monitor= this.getIntent().getParcelableArrayListExtra("monitorList");
CholesterolFragment cholesterolFragment= new CholesterolFragment();
cholesterolFragment.execute(cholesterol_monitor);
在我的异步方法中
private class CholesterolFragment extends AsyncTask<ArrayList<CholesterolMonitor>, Void, ArrayList<CholesterolMonitor>> {
@Override
protected ArrayList<CholesterolMonitor> doInBackground(ArrayList<CholesterolMonitor>... arrayLists) {
cholesterol_monitor=arrayLists[0];
return cholesterol_monitor;
}
@Override
protected void onPostExecute(ArrayList<CholesterolMonitor> result){
cholesterol_monitor= result;
monitorListFragment = MonitorListFragment.newInstance(cholesterol_monitor);
getSupportFragmentManager()
.beginTransaction()
.replace(R.id.fragment_monitor_layout, monitorListFragment)
.commit();
}
}
编辑:在我的MonitorListFragment
中 public static MonitorListFragment newInstance(ArrayList<CholesterolMonitor> monitor_list) {
MonitorListFragment fragment = new MonitorListFragment();
Bundle args = new Bundle();
args.putParcelableArrayList(ARG_MONITOR_LIST, monitor_list);
fragment.setArguments(args);
return fragment;
}
编辑:它是因为我的列表中有空对象,所以我在监视器列表中添加了一个检查回收器适配器,但没有显示名称?
这在我的Monitorlistrecycleradapter
中 public void onBindViewHolder(final MonitorListRecyclerAdapter.ViewHolder holder, int position) {
if (!(data.get(position).getPatient()== null)){
String patient = "Patient: " + data.get(position).getPatient().getName().get(0).getNameAsSingleString();
String cholesterolLevel = "Cholesterol: "
+ String.format("%.2f", data.get(position).getPatientCholesterolLevel()) + " "
+ data.get(position).getUnitsMeasurement();
holder.patientNameView.setText(patient);
holder.cholesterolView.setText(cholesterolLevel);
}
如果首先将数据传递到片段
,那怎么样 Bundle bundle = new Bundle();
bundle.putStringArrayList(key,value);
fragment.setArguments(bundle);
然后在片段中检索
Bundle bundle = this.getArguments();
if (bundle != null) {
// execute AsyncTask class
}