java - How do I get List<Pojo1> which is present in its root Pojo, which also returns as a List<Pojo> -
i parsing ola cabs api response comes this:
{ "categories": [ { "id": "mini", "display_name": "mini", "currency": "inr", "distance_unit": "kilometre", "time_unit": "minute", "eta": 1, "distance": "0.2", "ride_later_enabled": "true", "image": "http://d1foexe15giopy.cloudfront.net/mini.png", "fare_breakup": [ { "type": "flat_rate", "minimum_distance": "4", "minimum_time": "0", "base_fare": "80", "minimum_fare": "0", "cost_per_distance": "10", "waiting_cost_per_minute": "0", "ride_cost_per_minute": "1", "rates_higher_than_usual": false, "surcharge": [] }, { "type": "airport_rate", "minimum_distance": "25", "minimum_time": "0", "base_fare": "499", "minimum_fare": "0", "cost_per_distance": "13", "waiting_cost_per_minute": "0", "ride_cost_per_minute": "1", "rates_higher_than_usual": false, "surcharge": [] } ], "cancellation_policy": { "cancellation_charge": 50, "currency": "inr", "cancellation_charge_applies_after_time": 5, "time_unit": "minute" } } ], "ride_estimate": {} } i've created model classes as:
public class listofestimatetimeforola() { list<categories> categories; //getter of categories } above class main pojo response. below given pojo named- categories.
public class categories() { list<fare_breakup>; //getter of fare_breakup } and there's model defined fare_breakup this:
public class fare_breakup { int base_fare; //getter of fare } now, response in fragment, code below:
requestinterface = retrofit.create(riderequestinterface.class); if (pickup_lat != 0 && pickup_long != 0 ) { call<listofestimatetimeforola> pricedata = requestinterface.getestimatetimeforola(pickup_lat, pickup_long); pricedata.enqueue(new callback<listofestimatetimeforola>() { @override public void onresponse(@nonnull call<listofestimatetimeforola> call, @nonnull response<listofestimatetimeforola> response) { int statuscode = response.code(); listofestimatetimeforola data = response.body(); assert data != null; estimatetimeadapterforola adapter = new estimatetimeadapterforola(data.getcategories(), getcontext()); estimatepriceforola.setadapter(adapter); progressforola.setvisibility(view.gone); estimatepriceforola.setvisibility(view.visible); log.d("estimated time ola", "onresponse: "+ statuscode); } @override public void onfailure(@nonnull call<listofestimatetimeforola> call, @nonnull throwable t) { log.d("estimated time ola", "onresponse: "+ t.getmessage()); } }); } i need fare in recyclerview adapter class below:
public class estimatetimeadapterforola extends recyclerview.adapter<estimatetimeadapterforola.estimatetimeholder>{ private context c; private list<estimatetimeforola> estimatetimeforola; public estimatetimeadapterforola (list<estimatetimeforola> estimatetimeforola, context c) { this.estimatetimeforola = estimatetimeforola; this.c = c; } @override public estimatetimeholder oncreateviewholder(viewgroup parent, int viewtype) { view view = layoutinflater.from(parent.getcontext()).inflate(r.layout.estimate_time_for_ola, parent, false); estimatetimeholder holder = new estimatetimeholder(view); return holder; } @override public void onbindviewholder(estimatetimeholder holder, int position) { holder.displayname.settext(estimatetimeforola.get(position).getdisplay_name()); picasso.with(c).load(estimatetimeforola.get(position).getimage()).into(holder.displayicon); holder.fare.settext(string.valueof(estimatetimeforola.get(position).getfare_breakup().get(0).getbase_fare())); holder.eta.settext(string.valueof(estimatetimeforola.get(position).geteta())); } @override public int getitemcount() { return estimatetimeforola.size(); } public static class estimatetimeholder extends recyclerview.viewholder { textview displayname, fare, eta; imageview displayicon; public estimatetimeholder(view itemview) { super(itemview); displayname = itemview.findviewbyid(r.id.display_name_ola_tv); fare = itemview.findviewbyid(r.id.actual_fare_tv); eta = itemview.findviewbyid(r.id.actual_eta_tv); displayicon = itemview.findviewbyid(r.id.display_icon_ola_iv); } } } now, problem how fare in recyclerview through onbindviewholder?
below given error after running above code:
07-28 17:27:50.134 330-330/test.android.mobond.tabs.slidingtabs e/androidruntime: fatal exception: main process: test.android.mobond.tabs.slidingtabs, pid: 330 java.lang.nullpointerexception: attempt invoke interface method 'java.lang.object java.util.list.get(int)' on null object reference @ test.android.mobond.tabs.slidingtabs.adapters.estimatetimeadapterforola.onbindviewholder(estimatetimeadapterforola.java:45) @ test.android.mobond.tabs.slidingtabs.adapters.estimatetimeadapterforola.onbindviewholder(estimatetimeadapterforola.java:22) @ android.support.v7.widget.recyclerview$adapter.onbindviewholder(recyclerview.java:6400) @ android.support.v7.widget.recyclerview$adapter.bindviewholder(recyclerview.java:6433) @ android.support.v7.widget.recyclerview$recycler.trybindviewholderbydeadline(recyclerview.java:5377) @ android.support.v7.widget.recyclerview$recycler.trygetviewholderforpositionbydeadline(recyclerview.java:5640) @ android.support.v7.widget.recyclerview$recycler.getviewforposition(recyclerview.java:5482) @ android.support.v7.widget.recyclerview$recycler.getviewforposition(recyclerview.java:5478) @ android.support.v7.widget.linearlayoutmanager$layoutstate.next(linearlayoutmanager.java:2215) @ android.support.v7.widget.linearlayoutmanager.layoutchunk(linearlayoutmanager.java:1542) @ android.support.v7.widget.linearlayoutmanager.fill(linearlayoutmanager.java:1502) @ android.support.v7.widget.linearlayoutmanager.onlayoutchildren(linearlayoutmanager.java:595) @ android.support.v7.widget.recyclerview.dispatchlayoutstep2(recyclerview.java:3625) @ android.support.v7.widget.recyclerview.onmeasure(recyclerview.java:3067) @ android.view.view.measure(view.java:18870) @ android.view.viewgroup.measurechildwithmargins(viewgroup.java:5908) @ android.widget.framelayout.onmeasure(framelayout.java:436) @ android.view.view.measure(view.java:18870) @ android.support.v4.view.viewpager.onmeasure(viewpager.java:1629) @ android.view.view.measure(view.java:18870) @ android.widget.relativelayout.measurechildhorizontal(relativelayout.java:728) @ android.widget.relativelayout.onmeasure(relativelayout.java:464) @ android.view.view.measure(view.java:18870) @ android.view.viewgroup.measurechildwithmargins(viewgroup.java:5908) @ android.widget.framelayout.onmeasure(framelayout.java:436) @ android.support.v7.widget.contentframelayout.onmeasure(contentframelayout.java:139) @ android.view.view.measure(view.java:18870) @ android.view.viewgroup.measurechildwithmargins(viewgroup.java:5908) @ android.widget.linearlayout.measurechildbeforelayout(linearlayout.java:1435) @ android.widget.linearlayout.measurevertical(linearlayout.java:721) @ android.widget.linearlayout.onmeasure(linearlayout.java:612) @ android.view.view.measure(view.java:18870) @ android.view.viewgroup.measurechildwithmargins(viewgroup.java:5908) @ android.widget.framelayout.onmeasure(framelayout.java:436) @ android.view.view.measure(view.java:18870) @ android.view.viewgroup.measurechildwithmargins(viewgroup.java:5908) @ android.widget.linearlayout.measurechildbeforelayout(linearlayout.java:1435) @ android.widget.linearlayout.measurevertical(linearlayout.java:721) @ android.widget.linearlayout.onmeasure(linearlayout.java:612) @ android.view.view.measure(view.java:18870) @ android.view.viewgroup.measurechildwithmargins(viewgroup.java:5908) @ android.widget.framelayout.onmeasure(framelayout.java:436) @ com.android.internal.policy.impl.phonewindow$decorview.onmeasure(phonewindow.java:3076) @ android.view.view.measure(view.java:18870) @ android.view.viewrootimpl.performmeasure(viewrootimpl.java:2392) @ android.view.viewrootimpl.measurehierarchy(viewrootimpl.java:1416) @ android.view.viewrootimpl.performtraversals(viewrootimpl.java:1661) @ android.view.viewrootimpl.dotraversal(viewrootimpl.java:1301) @ android.view.viewrootimpl$traversalrunnable.run(viewrootimpl.java:7016) @ android.view.choreographer$callbackrecord.run(choreographer.java:777) @ android.view.choreographer.docallbacks(choreographer.java:590) @ android.view.choreog
create pojos using json2pojo create adequate pojo classes , use retrofit
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