我正在解析这个json：
[
{
"title": American Government,
"type": "Democracy",
"independent": {
"from": [
{
"Britain"
}
],
"date": [
{
"by": "Britain",
"day_real": "http://example.com/json/independent"
}
],
},
}
...]
＆＃34; day_real＆＃34;的价值导致另一个json看起来像这样：
{
"year": 1800,
"from": "Brtain"
}
我的目标是解析两个json并在Recyclerview中显示它。
这些是我的课程。
MainActivity
public class MainActivity extends AppCompatActivity {
private final String TAG = "MainActivity";
private String govDate;
//Creating a list of govns
private List<GovnItems> mGovnItemsList;
//Creating Views
private RecyclerView recyclerView;
private RecyclerView.Adapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Log.d(TAG, "onCreate called");
//Initializing Views
recyclerView = (RecyclerView) findViewById(R.id.govn_recycler);
LinearLayoutManager layoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(layoutManager);
adapter = new GovnAdapter(mGovnItemsList, this);
recyclerView.setAdapter(adapter);
getData ();
}
//This method will get data from the web api
private void getData(){
Log.d(TAG, "getData called");
//Creating a json request
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(ConfigGovn.GET_URL,
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
Log.d(TAG, "onResponse called");
//calling method to parse json array
parseData(response);
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
});
//Creating request queue
RequestQueue requestQueue = Volley.newRequestQueue(this);
//Adding request to the queue
requestQueue.add(jsonArrayRequest);
}
//This method will parse json data
private void parseData(JSONArray array){
Log.d(TAG, "Parsing array");
for(int i = 0; i<array.length(); i++) {
GovnItems govnItem = new GovnItems();
JSONObject jsonObject = null;
try {
jsonObject = array.getJSONObject(i);
govnItem.setGovnTitle(jsonObject.getString("title"));
govnItem.setGovnType(jsonObject.getString("type"));
JSONObject govnInde = jsonObject.getJSONObject("independent");
JSONArray govnDate = govnInde.getJSONArray("date");
String dayUrl = govnDate.getJSONObject(0).getString("day_real");
govDate = dayUrl;
} catch (JSONException w) {
w.printStackTrace();
}
mGovnItemsList.add(govnItem);
loadDate();
}
adapter.notifyItemRangeChanged(0, adapter.getItemCount());
}
private void loadDate() {
Log.d(TAG, "Loading Date");
final JsonObjectRequest dateObjectRequest = new JsonObjectRequest(govDate, null,
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Log.d("Debug", response.toString());
parseDate(response);
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d("", "Error: " + error.getMessage());
}
});
//Creating resquestqueue
RequestQueue dateRequest = Volley.newRequestQueue(this);
//Adding request to queue
dateRequest.add(dateObjectRequest);
}
//This method will parse date
private void parseDate(JSONObject authJsonObject) {
Log.d(TAG, "Parsing Indep day");
GovnItems dateItem = new GovnItems();
try {
String dateFrom = authJsonObject.getString("from");
dategovnItem.setGovn_author(dateFrom);
Log.d(TAG, authorName);
} catch (JSONException w) {
w.printStackTrace();
}
mGovnItemsList.add(dateItem);
}
}
GovnAdapter
public class GovnAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>{
private Context mContext;
//List of govns
private List<GovnItems> mGovnItems;
private final int VIEW_ITEM = 0;
private final int VIEW_PROG = 1;
private int lastPosition = -1;
public GovnAdapter(List<GovnItems> govnItems, Context context) {
super();
//Getting all govns
this.mGovnItems = govnItems;
this.mContext = context;
}
@Override
public int getItemViewType(int position) {
if (isPositionItem(position))
return VIEW_ITEM;
return VIEW_PROG;
}
private boolean isPositionItem(int position) {
return position != getItemCount()-1;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder (ViewGroup parent, int viewType) {
if (viewType == VIEW_ITEM) {
View v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.govn_summ, parent, false);
return new TextViewHolder(v);
} else if (viewType == VIEW_PROG){
View v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.recyclerfooter, parent, false);
return new ProgressViewHolder(v);
}
return null;
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
if (holder instanceof TextViewHolder) {
final GovnItems govnList = mGovnItems.get(position);
((TextViewHolder) holder).govnTitle.setText(Html.fromHtml(govnList.getGovn_title()));
((TextViewHolder) holder).govnType.setText(Html.fromHtml(govnList.getGovn_type()));
((TextViewHolder) holder).govnDate.setText(govnList.getGovn_date());
} else {
((ProgressViewHolder) holder).progressBar.setIndeterminate(true);
((ProgressViewHolder) holder).loadButton.setText(R.string.reload);
}
}
@Override
public int getItemCount(){
//Return the number of items in the data set
return mGovnItems.size();
}
public static class TextViewHolder extends RecyclerView.ViewHolder{
public TextView govnTitle,govnType, govnDate;
public TextViewHolder (final View govnView) {
super(govnView);
govnTitle = (TextView) govnView.findViewById(R.id.govn_title);
govnType = (TextView) govnView.findViewById(R.id.govn_type);
govnDate = (TextView) govnView.findViewById(R.id.govn_date);
}
public static class ProgressViewHolder extends RecyclerView.ViewHolder {
Button loadButton;
ProgressBar progressBar;
public ProgressViewHolder(View footerView){
super(footerView);
loadButton = (Button) footerView.findViewById(R.id.reload_button);
progressBar = (ProgressBar) footerView.findViewById(R.id.progress_load);
}
}
}
我对此代码所遇到的问题是从＆＃34;获得＆＃34;的价值。显示。它只是没有显示。从我的logcat中，我可以看到日期确实已被提取，而且＃34;来自＆＃34;正在成功解析，但它只是不会显示。 我已经调试和调试但没有任何线索。
拜托，您知道我应该如何解决这个问题吗？
答案 0 :(得分：0)
仅在完全从服务器获取数据后使用以下代码
adapter = new GovnAdapter(mGovnItemsList, this);
recyclerView.setAdapter(adapter);
答案 1 :(得分：0)
我没有编译你的代码，但如果我没有错，这就是问题：
String dayUrl = govnDate.getJSONObject(0).getString("day_real");
govDate = dateUrl;
应为govDate = dayUrl