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[英]How to parse JSON data without define array in JSON in Android Studio
[英]How to parse json data from json array to recyclerview java android?
我可以将 json 数据解析到我的 recyclerview。 但是当我遇到其中包含数组数据的 json 时,我的应用程序会在我尝试获取该数据时强行关闭。 如何解决这个问题? 或者任何人都有与这种情况类似的示例代码?
Api:
Activity_Stepcounter.java
Call<nodeApi> call = jsonPlaceHolderApi.getNode();
call.enqueue(new Callback<nodeApi>() {
@Override
public void onResponse(Call<nodeApi> call, Response<nodeApi> response) {
progressBar.setVisibility(View.GONE);
nodeApi resource = response.body();
List<nodeApi.steps_count> dataList = resource.steps_count;
Adapter_meeting rv_adapter = new Adapter_meeting(dataList, Activity_Stepcounter.this);
rv.setLayoutManager(new LinearLayoutManager(Activity_Stepcounter.this));
rv.setAdapter(rv_adapter);
rv.hasFixedSize();
rv_adapter.notifyDataSetChanged();
}
@Override
public void onFailure(Call<nodeApi> call, Throwable t) {
call.cancel();
}
});
Adapter_meeting.java
public class Adapter_meeting extends RecyclerView.Adapter<Adapter_meeting.viewHolder> {
private final List<nodeApi.steps_count> mitem_meeting;
private final Context mContext;
public Adapter_meeting(List<nodeApi.steps_count> Item_meeting, Context mContext) {
this.mitem_meeting = Item_meeting;
this.mContext = mContext;
}
@NonNull
@Override
public viewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
final View view;
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.rv_step_counter, parent, false);
final viewHolder vHolder = new viewHolder(view);
return vHolder;
}
@Override
public void onBindViewHolder(@NonNull viewHolder holder, int position) {
holder.tv_namaEvent.setText(mitem_meeting.get(position).getValue());
holder.tv_lokasiEvent.setText(mitem_meeting.get(position).getStartTime());
holder.tv_waktuEvent.setText(mitem_meeting.get(position).getEndTime());
holder.tv_tanggalEvent.setText(mitem_meeting.get(position).getStartTimeMillis());
}
@Override
public int getItemCount() {
return mitem_meeting.size();
}
public class viewHolder extends RecyclerView.ViewHolder {
private final TextView tv_namaEvent;
private final TextView tv_lokasiEvent;
private final TextView tv_waktuEvent;
private final TextView tv_tanggalEvent;
public viewHolder(@NonNull View itemView) {
super(itemView);
tv_namaEvent = (TextView) itemView.findViewById(R.id.id_tv_namaEvent);
tv_lokasiEvent = (TextView) itemView.findViewById(R.id.id_tv_lokasiEvent);
tv_waktuEvent = (TextView) itemView.findViewById(R.id.id_tv_waktuEvent);
tv_tanggalEvent = (TextView) itemView.findViewById(R.id.id_tv_tanggalEvent);
}
}}
JsonPlaceHolderApi.java
public interface JsonPlaceHolderApi {
@GET("aggregatesDatasets?dataTypeName=steps_count,heart_minutes,weight,activity_summary")
Call<nodeApi> getNode();}
nodeApi.java
public class nodeApi {
@SerializedName("steps_count")
public List<steps_count> steps_count = null;
public class steps_count {
public Integer value;
public String startTimeMillis;
public String endTimeMillis;
public String startTime;
public String endTime;
public steps_count(Integer value, String startTimeMillis, String endTimeMillis, String startTime, String endTime) {
this.value = value;
this.startTimeMillis = startTimeMillis;
this.endTimeMillis = endTimeMillis;
this.startTime = startTime;
this.endTime = endTime;
}
public Integer getValue() {
return value;
}
public void setValue(Integer value) {
this.value = value;
}
public String getStartTimeMillis() {
return startTimeMillis;
}
public void setStartTimeMillis(String startTimeMillis) {
this.startTimeMillis = startTimeMillis;
}
public String getEndTimeMillis() {
return endTimeMillis;
}
public void setEndTimeMillis(String endTimeMillis) {
this.endTimeMillis = endTimeMillis;
}
public String getStartTime() {
return startTime;
}
public void setStartTime(String startTime) {
this.startTime = startTime;
}
public String getEndTime() {
return endTime;
}
public void setEndTime(String endTime) {
this.endTime = endTime;
}
}
}
错误
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.iot.testapp, PID: 12849
android.content.res.Resources$NotFoundException: String resource ID #0x19
at android.content.res.Resources.getText(Resources.java:335)
at android.widget.TextView.setText(TextView.java:4555)
at com.iot.testapp.adapter.Adapter_meeting.onBindViewHolder(Adapter_meeting.java:47)
at com.iot.testapp.adapter.Adapter_meeting.onBindViewHolder(Adapter_meeting.java:26)
在这些方面:
holder.tv_tanggalEvent.setText(mitem_meeting.get(position).getStartTimeMillis());
holder.tv_lokasiEvent.setText(mitem_meeting.get(position).getStartTime());
holder.tv_waktuEvent.setText(mitem_meeting.get(position).getEndTime());
编译器认为,您传递的是字符串资源,但实际上您传递的是简单的字符串。 只需添加 +"" 即可开始工作。
holder.tv_tanggalEvent.setText(mitem_meeting.get(position).getStartTimeMillis()+"");
holder.tv_namaEvent.setText(mitem_meeting.get(position).getStartTime()+"");
holder.tv_waktuEvent.setText(mitem_meeting.get(position).getEndTime()+"");
您应该以带有占位符的 String 资源形式将文本传递给文本视图,但是当您除了更改值之外不传递任何内容时,这实际上没有任何意义。
holder.tv_namaEvent.setText(mitem_meeting.get(position).getValue());
您正在尝试设置 Int。 尝试:
String value = String.valueOf(mitem_meeting.get(position).getValue());
holder.tv_namaEvent.setText(value);
请检查 null 的所有字段并阅读 Android 中的名称约定:)
以 milis 为单位的时间也应存储在 Long 类型中。 您还可以阅读有关 Kotlin 语言、mvvn 模式等的信息。
谢谢,我得到了discord的帮助
我必须先制作 jsonresponse,然后使用 nodeApi.java 将其转换为 arraylist。
public class JsonResponse {
private nodeApi[] steps_count;
public nodeApi[] getStep_count() {
return steps_count;
}
public void setnodeApi(nodeApi[] step_count) {
this.steps_count = step_count;
}
}
Activity_Stepcounter.java
Call<JsonResponse> call = jsonPlaceHolderApi.getStep();
call.enqueue(new Callback<JsonResponse>() {
@Override
public void onResponse(Call<JsonResponse> call, Response<JsonResponse> response) {
progressBar.setVisibility(View.GONE);
JsonResponse jsonResponse = response.body();
listStep = new ArrayList<>(Arrays.asList(jsonResponse.getStep_count()));
Adapter_meeting rv_adapter = new Adapter_meeting(listStep, Activity_Stepcounter.this);
rv.setLayoutManager(new LinearLayoutManager(Activity_Stepcounter.this));
rv.setAdapter(rv_adapter);
rv.hasFixedSize();
rv_adapter.notifyDataSetChanged();
}
@Override
public void onFailure(Call<JsonResponse> call, Throwable t) {
call.cancel();
}
});
**有一些重构/重命名。
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