CODEWITHSUNDEEP
androidjsonadapterretrofit2
mustangws
mustangws

Reputation: 69

Android Retrofit 2 issue in adapter

I have problem with adapter. I'm using retrofit 2 to parse JSON data. JSON example, models and adapter code are below.

JSON example:

[{
"id":1,
"type":"TEMPERATURE",
"measurements":[
    {
        "value":"22.58",
        "time":"2017-01-11T12:20:44.701"
        }]
},{
"id":2,
"type":"HUMIDITY",
"measurements":[
    {
        "value":"52.366",
        "time":"2017-01-11T12:20:44.731"
        }]
},{
"id":3,
"type":"LUMINOSITY",
"measurements":[
    {
        "value":"1.0",
        "time":"2017-01-11T12:20:44.742"
        }]
}]

Model Senzori:

public class Senzori {

@SerializedName("id")
@Expose
private Integer id;
@SerializedName("type")
@Expose
private String type;
@SerializedName("measurements")
@Expose
private List<Measurement> measurements = new ArrayList<>();

public Integer getId() {
    return id;
}

public void setId(Integer id) {
    this.id = id;
}

public String getType() {
    return type;
}

public void setType(String type) {
    this.type = type;
}

public List<Measurement> getMeasurements() {
    return measurements;
}

public void setMeasurements(List<Measurement> measurements) {
    this.measurements = measurements;
}

}

Model Measurement:

public class Measurement {

@SerializedName("value")
@Expose
private String value;
@SerializedName("time")
@Expose
private String time;

public String getValue() {
    return value;
}

public void setValue(String value) {
    this.value = value;
}

public String getTime() {
    return time;
}

public void setTime(String time) {
    this.time = time;
}
}

Adapter:

public class SenzoriAdapter extends RecyclerView.Adapter<SenzoriAdapter.Holder>{

private List<Senzori> mSenzori;

public SenzoriAdapter(){
    mSenzori = new ArrayList<>();
}

@Override
public Holder onCreateViewHolder(ViewGroup parent, int viewType) {
    View row = LayoutInflater.from(parent.getContext()).inflate(R.layout.main_item, parent, false);
    return new Holder(row);
}

@Override
public void onBindViewHolder(Holder holder, int position) {
    Senzori curr = mSenzori.get(position);
    holder.senzoriType.setText(curr.getType());
    holder.senzoriLastAlive.setText(curr.getMeasurements().getTime());
    holder.senzoriMeasurement.setText(curr.getMeasurements().getValue());

}

@Override
public int getItemCount() {
    return mSenzori.size();
}

public void addSenzori(Senzori senzori) {
    mSenzori.add(senzori);
    notifyDataSetChanged();
}

public class Holder extends RecyclerView.ViewHolder {
    private TextView senzoriType, senzoriLastAlive, senzoriMeasurement;
    public Holder(View itemView) {
        super(itemView);
        senzoriType = (TextView) itemView.findViewById(R.id.senzoriType);
        senzoriLastAlive = (TextView) itemView.findViewById(R.id.senzoriLastAlive);
        senzoriMeasurement = (TextView) itemView.findViewById(R.id.senzoriMeasurement);
    }
}
}

I'm getting "Cannot resolve method" on getTime() and getValue().

Upvotes: 0

Views: 231

Answers (2)

Mark O&#39;Sullivan
Mark O&#39;Sullivan

Reputation: 10778

The problem is you haven't given any information on what item from the List that you wish to find the value or time of.

holder.senzoriMeasurement.setText(curr.getMeasurements().get(<item you wish to get>).getValue;

If you want to get the first item in the List

holder.senzoriMeasurement.setText(curr.getMeasurements().get(0).getValue;

Upvotes: 1

Eric B.
Eric B.

Reputation: 4702

Since getMeasurements() returns a List and the JSON you have shown contains only one item. Hence you should call it like this:

holder.senzoriLastAlive.setText(curr.getMeasurements().get(0).getTime());
holder.senzoriMeasurement.setText(curr.getMeasurements().get(0).getValue());

I would suggest adding a check to see if getMeasurements() is not empty, else you will get an Exception.

Upvotes: 2

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