【发布时间】：2016-03-24 07:36:53
【问题描述】：
我有一个 Web 服务，它返回图像列表（个人资料图片）及其名称和 ID 号。有些成员没有头像。所以我从drawable添加默认图片。我正在使用 volley post 和 pojo 来获取 json 并在 gridview 中添加图片和名称。但不是显示图像和名称，而是显示 JSON 错误消息“没有 profile_picture 的值”。 This 是我的 json 结果。因此，在获取图像和名称方面的任何帮助将不胜感激。
Main fragment:
public class SearchName extends Fragment{
private GridView mGridView;
private GridItem newItem;
private GridAdapter mGridAdapter;
private ArrayList<GridItem> mGridData;
public static final String KEY_USERID = "user_id", KEY_NAME = "search_text";
private static final String FETCH_ALL_MEMBERS = "http://example.com/api/member/get-all/";
String profile_picture = "";
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.searchname, container, false);
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
mGridView = (GridView)view.findViewById(R.id.grid_view);
displayLog();
mGridData = new ArrayList<>();
mGridAdapter = new GridAdapter(getContext(), R.layout.gridrow, mGridData);
mGridView.setAdapter(mGridAdapter);
}
private void displayLog() {
StringRequest stringRequest = new StringRequest(Request.Method.POST, FETCH_ALL_MEMBERS,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
try {
JSONObject jObj = new JSONObject(response);
System.out.println(jObj);
String status = jObj.getString("status");
// Now check status value
if (status.equals("0")) {
Toast.makeText(getActivity(), "There was some error! Please try again.", Toast.LENGTH_LONG).show();
} else if (status.equals("1")) {
JSONArray result = jObj.getJSONArray("result");
for (int i = 0; i < result.length(); i++) {
JSONObject json_data = result.getJSONObject(i);
String name = json_data.getString("name");
String user_id = json_data.getString("user_id");
//String profile_picture = json_data.getString("profile_picture");
newItem.setName(name);
newItem.setUserId(user_id);
if(json_data.has("profile_picture")){
//String image_def = String.valueOf(R.drawable.default_profile);
newItem.setImage(json_data.getString("profile_picture"));
}else{
Uri path = Uri.parse("android.resource://com.sam.fitlincsearch/" + R.drawable.default_profile);
String image_def = path.toString();
newItem.setImage(image_def);
}
mGridData.add(newItem);
}
mGridAdapter.notifyDataSetChanged();
} else {
// Error in login. Get the error message
String errorMsg = jObj.getString("error_msg");
Toast.makeText(getActivity(), errorMsg, Toast.LENGTH_LONG).show();
}
} catch (JSONException e) {
// JSON error
e.printStackTrace();
Toast.makeText(getActivity(), "Json error: " + e.getMessage(), Toast.LENGTH_LONG).show();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getActivity(), error.toString(), Toast.LENGTH_LONG).show();
}
}) {
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put(KEY_USERID, "1");
return params;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(getActivity());
requestQueue.add(stringRequest);
}
}Adapter:
public class GridAdapter extends ArrayAdapter<GridItem> {
private Context mContext;
int resource;
private ArrayList<GridItem> mGridData = new ArrayList<GridItem>();
public GridAdapter(Context mContext, int resource, ArrayList<GridItem> mGridData) {
super(mContext, resource, mGridData);
this.resource = resource;
this.mContext = mContext;
this.mGridData = mGridData;
}
public void setGridData(ArrayList<GridItem> mGridData) {
this.mGridData = mGridData;
notifyDataSetChanged();
}
@Override
public GridItem getItem(int position) {
return super.getItem(position);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
ViewHolder holder;
if (v == null) {
holder = new ViewHolder();
LayoutInflater inflater = ((Activity) mContext).getLayoutInflater();
v = inflater.inflate(R.layout.gridrow, parent, false);
holder.image = (ImageView) v.findViewById(R.id.item_image);
holder.name = (TextView) v.findViewById(R.id.item_name);
holder.image = (ImageView) v.findViewById(R.id.item_image);
v.setTag(holder);
} else {
holder = (ViewHolder) v.getTag();
}
GridItem item = mGridData.get(position);
Picasso.with(mContext)
.load(item.getImage())
.placeholder(R.drawable.placeholder)
.fit()
.into(holder.image);
holder.name.setText(item.getName());
return v;
}
class ViewHolder {
ImageView image, icon;
TextView name;
}
}Pojo:
public class GridItem {
private String nameUrls, imageUrls, sportsCat, userId;
public GridItem() {
super();
}
public String getImage() {
return imageUrls;
}
public void setImage(String imageUrls) {
this.imageUrls = imageUrls;
}
public String getName() {
return nameUrls;
}
public void setName(String nameUrls) {
this.nameUrls = nameUrls;
}
public String getSportsCat(){
return sportsCat;
}
public void setSportsCat(String sportsCat){
this.sportsCat = sportsCat;
}
public String getUserId(){
return userId;
}
public void setUserId(String userId){
this.userId = userId;
}
}【问题讨论】：
-
你的 json 响应在哪里？也提供这个
-
请查看我编辑的帖子。它包含链接。
-
您需要检查头像标签是否存在？让我添加答案
-
是的。检查“profile_picture”json 标签是否存在，如果不存在则添加默认图像。
-
检查我添加的答案。
标签： android json android-volley android-gridview