我在recyclerview中使用cardview列出改装请求的结果，接下来我想获得点击的cardview的详细信息，并在片段中显示cardview（json）的详细信息（简明扼要地说我使用片段列出并显示详细信息）
下面的代码是我的第一个片段，其中我使用改进2来获取json。这段代码工作正常，给出了输出json。
public class AgentAssetsFragment extends Fragment implements View.OnClickListener {
public TextView titleName, assetRate, assetBrand;
public RecyclerView assetRecyclerView;
List<AgentAsset> data;
AgentAssetsAdapter agentAssetsAdapter;
FrameLayout mLoadingFrame;
public SharedPreferences pref;
public AgentAssetsFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_agent_assets, container, false);
assetRecyclerView = (RecyclerView) view.findViewById(R.id.agentAssetListRecyclerId);
titleName = (TextView) view.findViewById(R.id.assetTitleId);
assetRate = (TextView) view.findViewById(R.id.assetRateId);
assetBrand = (TextView) view.findViewById(R.id.assetBrandId);
mLoadingFrame = (FrameLayout) view.findViewById(R.id.agentLoadingFrame);
initViews();
mLoadingFrame.setVisibility(View.VISIBLE);
return view;
}
private void initViews() {
assetRecyclerView.setHasFixedSize(true);
GridLayoutManager assetGridManager = new GridLayoutManager(getContext(), 2);
assetRecyclerView.setLayoutManager(assetGridManager);
assetRecyclerView.setAdapter(agentAssetsAdapter);
getAssets();
}
private void getAssets() {
HttpLoggingInterceptor logging = new HttpLoggingInterceptor();
logging.setLevel(HttpLoggingInterceptor.Level.BODY);
OkHttpClient.Builder httpClient = new OkHttpClient.Builder();
httpClient.readTimeout(60, TimeUnit.SECONDS);
httpClient.connectTimeout(60, TimeUnit.SECONDS);
pref = this.getActivity().getSharedPreferences("LoginActivity", Context.MODE_PRIVATE);
final String acToken = pref.getString("token", "DEFAULT");
httpClient.addInterceptor(new Interceptor() {
@Override
public okhttp3.Response intercept(Chain chain) throws IOException {
Request original = chain.request();
Request request = original.newBuilder()
.header("Authorization", "Bearer " + acToken)
.method(original.method(), original.body())
.build();
return chain.proceed(request);
}
});
OkHttpClient client = httpClient.build();
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(Constants.BASE_URL)
.addConverterFactory(GsonConverterFactory.create())
.client(client)
.build();
final ApiInterface apiInterface = retrofit.create(ApiInterface.class);
final AssetRequest assetRequest = new AssetRequest();
final Call<List<AgentAsset>> call = apiInterface.getAssetListOfAgent();
call.enqueue(new Callback<List<AgentAsset>>() {
@Override
public void onResponse(Call<List<AgentAsset>> call, Response<List<AgentAsset>> response) {
int statusCode = response.code();
if (statusCode == 200 && response.body() != null) {
List<AgentAsset> agentAssets = response.body();
data = agentAssets;
agentAssetsAdapter = new AgentAssetsAdapter(data);
id = agentAssetsAdapter.agentAssetId;
assetRecyclerView.setAdapter(agentAssetsAdapter);
Toast.makeText(getContext(), data.size() + " results", Toast.LENGTH_SHORT).show();
} else if (statusCode == 406) {
Toast.makeText(getContext(), "Your token expired " + statusCode, Toast.LENGTH_LONG).show();
} else if (response.body() == null) {
Toast.makeText(getContext(), "No results " + statusCode, Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(getContext(), "Network error, try again later " + statusCode, Toast.LENGTH_LONG).show();
}
mLoadingFrame.setVisibility(View.INVISIBLE);
}
@Override
public void onFailure(Call<List<AgentAsset>> call, Throwable t) {
mLoadingFrame.setVisibility(View.INVISIBLE);
Toast.makeText(getContext(), "Error, Check your network ", Toast.LENGTH_LONG).show();
Log.d("AgentAsset GET Failure", "onFailure: " + t.getMessage());
}
});
}
@Override
public void onClick(View v) {
}
}
这是我用于对RecyclerView进行充气的适配器类，其中我使用cardview来指示每个项目。我能够获得项目的位置点击，但当我尝试获取项目的ID时，它始终显示列表中最后一项的ID。我不知道为什么，从今天早上在stackoverflow中尝试了每个问题，没有找到我的查询结果。
public class AgentAssetsAdapter extends RecyclerView.Adapter<AgentAssetsAdapter.ViewHolder> {
public List<AgentAsset> agentAssetLists;
private static AgentAssetClickListener agentAssetClickListener;
Integer agentAssetId;
String href;
public AgentAssetsAdapter(List<AgentAsset> agentAssetLists) {
this.agentAssetLists = agentAssetLists;
}
@Override
public int getItemCount() {
return agentAssetLists.size();
}
public interface AgentAssetClickListener {
void onItemClick(int position, View v);
}
@Override
public AgentAssetsAdapter.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.agent_asset_card, viewGroup, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(AgentAssetsAdapter.ViewHolder holder, int position) {
if (agentAssetLists != null) {
holder.titleName.setText(agentAssetLists.get(position).getName());
holder.assetBrand.setText(agentAssetLists.get(position).getBrand().getName());
agentAssetId = agentAssetLists.get(position).getIdBrand();
href = agentAssetLists.get(position).getLinks().getSelf().getHref();
if (agentAssetLists.get(position).getRank() == -1) {
holder.agentRank.setText("");
} else {
holder.agentRank.setText(String.valueOf(agentAssetLists.get(position).getRank()));
}
if (Objects.equals(agentAssetLists.get(position).getRate().getAvailable().toString(), "0")) {
holder.assetRate.setText("nil");
} else {
holder.assetRate.setText(String.valueOf(agentAssetLists.get(position).getRate().getValue()));
}
if (Objects.equals(agentAssetLists.get(position).getBestRate().getAvailable().toString(), "0")) {
holder.agentRate.setText("nil");
} else {
holder.agentRate.setText(String.valueOf(agentAssetLists.get(position).getBestRate().getValue()));
}
} else {
holder.resultCount.setText("No Assets, Try Later");
}
}
public void addItems(List<AgentAsset> asResponse, int index) {
int cursize = agentAssetLists.size();
agentAssetLists.addAll(index, asResponse);
if (getItemCount() != 0) {
notifyItemRangeInserted(index, (agentAssetLists.size() - cursize));
} else {
notifyDataSetChanged();
}
}
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
TextView titleName, assetRate, assetBrand, agentRate, agentRank, resultCount;
ImageView assetImage;
public ViewHolder(View view) {
super(view);
resultCount = (TextView) view.findViewById(R.id.resultCountId);
titleName = (TextView) view.findViewById(R.id.agentAssetTitleId);
assetRate = (TextView) view.findViewById(R.id.assetRateId);
assetBrand = (TextView) view.findViewById(R.id.agentAssetBrandId);
agentRank = (TextView) view.findViewById(R.id.agentRankId);
agentRate = (TextView) view.findViewById(R.id.agentAssetRateId);
itemView.setOnClickListener(this);
//img_android = (ImageView) view.findViewById(R.id.img_android);
}
@Override
public void onClick(View v) {
//Log.d("item clicked", "item clicked" + getAdapterPosition() );
Toast.makeText(v.getContext(), "clicked aaa " + getAdapterPosition(), Toast.LENGTH_SHORT).show();
}
}
public void setOnItemClickListener(AgentAssetClickListener agentAssetClickListener) {
AgentAssetsAdapter.agentAssetClickListener = agentAssetClickListener;
}
@Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
}
}
如何从项目中获取ID？以及如何将数据传递到下一个片段，该片段显示当前点击的cardview的完整详细信息？任何帮助表示赞赏 提前谢谢。
修改 我忘了附上我的json回复，这是它
[
{
"id_asset": 1,
"id_category": 1,
"id_brand": 2,
"name": "Samsung Galaxy 6",
"status": 1,
"updated_at": "Oct 3, 2016 10:24:28 AM",
"rank": 1,
"rate": {
"available": 1,
"id_asset_rate": 2,
"id_asset": 1,
"id_user": 10,
"value": 5000,
"loan_to_value": 50,
"offered": 2500,
"annual_rate": 3,
"quantity": 5,
"status": 1,
"created_at": 1477200691,
"updated_at": 1477200751
},
"best_rate": {
"available": 1,
"id_asset": 1,
"value": 5000,
"loan_to_value": 50,
"offered": 2500,
"annual_rate": 3,
"quantity": 5,
"rank": 1
},
"category": {
"id_category": 1,
"id_parent": 0,
"name": "Mobile Phones",
"image": "",
"sort": 1,
"status": 1,
"created_at": null,
"updated_at": null,
"_links": {
"self": {
"href": "/v1/categories/1"
}
}
},
"brand": {
"id_brand": 2,
"name": "Samsung",
"status": 1,
"created_at": null,
"updated_at": null
},
"_links": {
"self": {
"href": "/v1/assets/1"
}
}
} ]
答案 0 :(得分：1)
您在适配器中的每个onBind上覆盖您的ID：
这里你应该得到null，因为在将适配器设置为RecyclerView之前永远不会设置id：
@Override
public void onResponse(Call<List<AgentAsset>> call, Response<List<AgentAsset>> response) {
//...
if (statusCode == 200 && response.body() != null) {
//...
agentAssetsAdapter = new AgentAssetsAdapter(data);
id = agentAssetsAdapter.agentAssetId; //<---
//...
}
//...
}
这里用资产ID的每次绑定迭代覆盖：
@Override
public void onBindViewHolder(AgentAssetsAdapter.ViewHolder holder, int position) {
if (agentAssetLists != null) {
holder.titleName....
holder.assetBrand....
//here you overwrite the id on every iteration.
agentAssetId = agentAssetLists.get(position).getIdBrand();
href = ....
}
}
结果是您获得了适配器中最新绑定资产项的ID。
这可能是您的解决方案：
调整界面：
public interface AgentAssetClickListener {
void onItemClick(int position, AgentAsset item);
}
实施您的界面：
public class AgentAssetsFragment extends Fragment implements AgentAssetsAdapter.AgentAssetClickListener {
public TextView titleName, assetRate, assetBrand;
public RecyclerView assetRecyclerView;
List<AgentAsset> data;
AgentAssetsAdapter agentAssetsAdapter;
FrameLayout mLoadingFrame;
public SharedPreferences pref;
public AgentAssetsFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
//...
initViews();
mLoadingFrame.setVisibility(View.VISIBLE);
return view;
}
private void initViews() {
assetRecyclerView.setHasFixedSize(true);
GridLayoutManager assetGridManager = new GridLayoutManager(getContext(), 2);
assetRecyclerView.setLayoutManager(assetGridManager);
getAssets();
}
private void getAssets() {
//...
call.enqueue(new Callback<List<AgentAsset>>() {
@Override
public void onResponse(Call<List<AgentAsset>> call, Response<List<AgentAsset>> response) {
int statusCode = response.code();
if (statusCode == 200 && response.body() != null) {
List<AgentAsset> agentAssets = response.body();
data = agentAssets;
agentAssetsAdapter = new AgentAssetsAdapter(data);
agentAssetsAdapter.setOnItemClickListener(AgentAssetsFragment.this);
assetRecyclerView.setAdapter(agentAssetsAdapter);
//id = agentAssetsAdapter.agentAssetId; //gon't know for what you use this...
Toast.makeText(getContext(), data.size() + " results", Toast.LENGTH_SHORT).show();
} else if //...
mLoadingFrame.setVisibility(View.INVISIBLE);
}
@Override
public void onFailure(Call<List<AgentAsset>> call, Throwable t) {
//...
}
});
}
@Override
public void onItemClick(int position, AgentAsset item) {
//item.getLinks().getSelf().getHref();
//item.getAssetId();
//Log.d("item clicked", "item clicked" + getAdapterPosition() );
Toast.makeText(getContext(), "Asset["+position+"] clicked: " + item, Toast.LENGTH_SHORT).show();
}
}
在Recycler适配器中调整绑定方法;
public class AgentAssetsAdapter extends RecyclerView.Adapter<AgentAssetsAdapter.ViewHolder> {
//why static?
//private static AgentAssetClickListener agentAssetClickListener;
//Integer agentAssetId;
//String href;
public List<AgentAsset> agentAssetLists;
private AgentAssetClickListener agentAssetClickListener;
public AgentAssetsAdapter(List<AgentAsset> agentAssetLists) {
this.agentAssetLists = agentAssetLists;
}
@Override
public int getItemCount() {
return agentAssetLists.size();
}
public interface AgentAssetClickListener {
void onItemClick(int position, View v);
}
@Override
public AgentAssetsAdapter.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.agent_asset_card, viewGroup, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(AgentAssetsAdapter.ViewHolder holder, int position) {
if (agentAssetLists != null) {
AgentAsset agentA = agentAssetLists.get(position);
holder.titleName.setText(agentA.getName());
holder.assetBrand.setText(agentA.getBrand().getName());
//global values were overwritten by every new agentA, what is the need for this?
//href = agentA.getLinks().getSelf().getHref();
//agentAssetId = agentA.getIdBrand();
//set an onlick listener to the itemView and call the agentAssetClickListener.onItemClick();
holder.itemView.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
if(agentAssetClickListener != null){
agentAssetClickListener.onItemClick(holder.getAdapterPosition(), agentA);
}
}
});
if (agentA.getRank() == -1) {
holder.agentRank.setText("");
} else {
holder.agentRank.setText(String.valueOf(agentA.getRank()));
}
if (Objects.equals(agentA.getRate().getAvailable().toString(), "0")) {
holder.assetRate.setText("nil");
} else {
holder.assetRate.setText(String.valueOf(agentA.getRate().getValue()));
}
if (Objects.equals(agentA.getBestRate().getAvailable().toString(), "0")) {
holder.agentRate.setText("nil");
} else {
holder.agentRate.setText(String.valueOf(agentA.getBestRate().getValue()));
}
} else {
holder.resultCount.setText("No Assets, Try Later");
}
}
public void addItems(List<AgentAsset> asResponse, int index) {
//...
}
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
TextView titleName, assetRate, assetBrand, agentRate, agentRank, resultCount;
ImageView assetImage;
public ViewHolder(View view) {
super(view);
resultCount = (TextView) view.findViewById(R.id.resultCountId);
titleName = (TextView) view.findViewById(R.id.agentAssetTitleId);
assetRate = (TextView) view.findViewById(R.id.assetRateId);
assetBrand = (TextView) view.findViewById(R.id.agentAssetBrandId);
agentRank = (TextView) view.findViewById(R.id.agentRankId);
agentRate = (TextView) view.findViewById(R.id.agentAssetRateId);
//no need anymore
//itemView.setOnClickListener(this);
//img_android = (ImageView) view.findViewById(R.id.img_android);
}
}
public void setOnItemClickListener(AgentAssetClickListener agentAssetClickListener) {
this.agentAssetClickListener = agentAssetClickListener;
}
}
AgentAssetClickListener 的侦听器通过 onItemClick（int，AgentAsset）获取项目，以便您可以通过 AgentAsset <的getter方法获取项目品牌ID / em> class。 如果id仍然相同，那么您的数据结构创建就会出现问题。
编辑：扩展答案以便更好地理解。