如何获取在ListFragment使用JSON的形象呢？形象、ListFragment、JSON
2023-09-12 06:40:05
作者：师太别认真
我是新android开发，我解析使用JSON解析方法我的数据，我致以类目录片段，我想我的列表视图数据，但问题是我收到的所有数据完全不同的图像，我不知道如何解决这个问题，我的回答是这样的
{匹配：[{名：单胞菌Dano","profile_id":"GM335695","image":"http://mywebsitename.com/images/Girlnoimage.jpg","cast":"","age":"24","location":"Ivory海岸}]}
公共类HomeFragment扩展ListFragment {
// CustomAdapter适配器;
//私有列表＆LT; RowItem＆GT; rowItems;
私人ProgressDialog pDialog;
// JSON解析器类
JSONParser jsonParser =新JSONParser（）;
JSONArray匹配= NULL;
ArrayList的＆LT; HashMap的＆LT;字符串，字符串＆GT;＆GT;一个列表;
私有静态字符串MATCH_URL = NULL;
私有静态最后弦乐TAG_MATCH =匹配;
私有静态最后弦乐TAG_NAME =名;
私有静态最后弦乐TAG_PROFILE =PROFILE_ID;
私有静态最后弦乐TAG_IMAGE =形象;
私有静态最后弦乐TAG_CAST =投;
私有静态最后弦乐TAG_AGE =时代;
私有静态最后弦乐TAG_LOCATION =地利;
私人的ListView列表视图;
公共HomeFragment（）{}
@覆盖
公共查看onCreateView（LayoutInflater充气，容器的ViewGroup，
捆绑savedInstanceState）{
。串strText的= getArguments（）的getString（user_login_id）;
MATCH_URL =http://mywebsitename.com/webservice/matching?version=apps&user_login_id="+strtext;
查看rootView = inflater.inflate（R.layout.fragment_home，集装箱，假）;
ALIST =新的ArrayList＆LT; HashMap的＆LT;字符串，字符串＆GT;＆GT;（）;
// rowItems =新的ArrayList＆LT; RowItem＆GT;（）;
列表视图=（ListView控件）rootView.findViewById（android.R.id.list）;
新LoadAlbums（）执行（）;
返回rootView;
}
类LoadAlbums扩展的AsyncTask＆LT;字符串，字符串，字符串＆GT; {
/ **
*在启动后台线程显示进度对话框
* * /
@覆盖
在preExecute保护无效（）{
super.on preExecute（）;
pDialog =新ProgressDialog（HomeFragment.this.getActivity（））;
pDialog.setMessage（载入中...）;
pDialog.setIndeterminate（假）;
pDialog.setCancelable（假）;
pDialog.show（）;
}
保护字符串doInBackground（字符串参数... args）{
ServiceHandler SH =新ServiceHandler（）;
//制作一个请求URL并得到响应
字符串jsonStr = sh.makeServiceCall（MATCH_URL，ServiceHandler.GET）;
Log.d（回应：，＆gt;中+ jsonStr）;
如果（jsonStr！= NULL）{
尝试 {
JSONObject的jsonObj =新的JSONObject（jsonStr）;
//获取JSON数组节点
匹配= jsonObj.getJSONArray（TAG_MATCH）;
//遍历所有联系人
的for（int i = 0; I＆LT; matching.length（）;我++）{
JSONObject的C = matching.getJSONObject（我）;
//保存在变量中的每个JSON项目的值
字符串用户名= c.getString（TAG_NAME）;
字符串USER_PROFILE = c.getString（TAG_PROFILE）;
字符串user_image = c.getString（TAG_IMAGE）;
字符串user_cast = c.getString（TAG_CAST）;
字符串user_age = c.getString（TAG_AGE）;
字符串user_location = c.getString（TAG_LOCATION）;
//创建新的HashMap
HashMap的＆LT;字符串，字符串＆GT;图=新的HashMap＆LT;字符串，字符串＆GT;（）;
//添加每个子节点HashMap中的key =＆GT;值
map.put（TAG_NAME，用户名）;
map.put（TAG_PROFILE，USER_PROFILE）;
map.put（TAG_IMAGE，user_image）;
map.put（TAG_CAST，user_cast）;
map.put（TAG_AGE，user_age +年）;
map.put（TAG_LOCATION，user_location）;
//添加HashList到ArrayList中
aList.add（图）
}
}赶上（JSONException E）{
e.printStackTrace（）;
}
} 其他 {
Log.e（ServiceHandler，无法从URL中得到任何数据）;
}
返回null;
}
保护无效onPostExecute（字符串file_url）{
super.onPostExecute（file_url）;
让所有专辑后//关闭该对话框
如果（pDialog.isShowing（））
pDialog.dismiss（）;
//从后台线程更新UI
/ **
*更新解析JSON数据到ListView控件
* * /
//更新列表视图
CustomAdapter适配器=新CustomAdapter（getActivity（），ALIST）;
setListAdapter（适配器）;
}
}
}
解决方案
尝试的 AndroidQuery 自定义适配器：
公共类CustomAdapter扩展了BaseAdapter {
私人上下文的背景下;
私人的ArrayList＆LT; HashMap的＆LT;字符串，字符串＆GT;＆GT;的ListData;
私人AQuery aQuery;
私有静态最后弦乐TAG_NAME =名;
私有静态最后弦乐TAG_PROFILE =PROFILE_ID;
私有静态最后弦乐TAG_IMAGE =形象;
私有静态最后弦乐TAG_CAST =投;
私有静态最后弦乐TAG_AGE =时代;
私有静态最后弦乐TAG_LOCATION =地利;
公共CustomAdapter（上下文的背景下，ArrayList的＆LT; HashMap的＆LT;字符串，字符串＆GT;＆GT;的ListData）{
this.context =背景;
this.listData =的ListData;
aQuery =新AQuery（this.context）;
}
@覆盖
公众诠释getCount将（）{
返回listData.size（）;
}
@覆盖
公共对象的getItem（INT位置）{
返回listData.get（位置）;
}
@覆盖
众长getItemId（INT位置）{
返回的位置;
}
@覆盖
公共查看getView（最终诠释的立场，观点convertView，ViewGroup中父）{
ViewHolder持有人;
如果（convertView == NULL）{
持有人=新ViewHolder（）;
convertView = LayoutInflater.from（上下文）.inflate（R.layout.list_item，NULL）;
holder.propic =（ImageView的）convertView.findViewById（R.id.propic）;
holder.txtproname =（TextView中）convertView.findViewById（R.id.txtproname）;
holder.txtproid =（TextView中）convertView.findViewById（R.id.txtproid）;
holder.txtprofilecast =（TextView中）convertView.findViewById（R.id.txtprofilecast）;
holder.txtprofileage =（TextView中）convertView.findViewById（R.id.txtprofileage）;
holder.txtprofileplace =（TextView中）convertView.findViewById（R.id.txtprofileplace）;
convertView.setTag（保持器）;
}其他{
支架=（ViewHolder）convertView.getTag（）;
}
holder.txtproname.setText（listData.get（位置）获得（TAG_NAME））;
holder.txtproid.setText（listData.get（位置）获得（TAG_PROFILE））;
holder.txtprofilecast.setText（listData.get（位置）获得（TAG_CAST））;
holder.txtprofileage.setText（listData.get（位置）获得（TAG_AGE））;
holder.txtprofileplace.setText（listData.get（位置）获得（TAG_LOCATION））;
aQuery.id(holder.propic).image(listData.get(position).get(TAG_IMAGE),true,true,0,R.drawable.ic_launcher);
//图片参数：1：内存缓存，2：文件缓存，3：目标宽度，4：后备图片
返回convertView;
}
类ViewHolder {
ImageView的propic;
TextView的txtproname;
TextView的txtproid;
TextView的txtprofilecast;
TextView的txtprofileage;
TextView的txtprofileplace;
}
}
如何设置适配器的ListView：
CustomAdapter适配器=新CustomAdapter（getActivity（），ALIST）;
setListAdapter（适配器）;
I am new to android development,I am parsing my data using JSON Parsing method,I extend my class with List Fragment and I want my data in list view but the problem is i am getting all the data perfectly except the images,i don't know how to solve it,my response looks like this
{"matching":[{"name":"Monic Dano","profile_id":"GM335695","image":"http://mywebsitename.com/images/Girlnoimage.jpg","cast":"","age":"24","location":"Ivory Coast"}]}
public class HomeFragment extends ListFragment {
//CustomAdapter adapter;
//private List<RowItem> rowItems;
private ProgressDialog pDialog;
//JSON parser class
JSONParser jsonParser = new JSONParser();
JSONArray matching=null;
ArrayList<HashMap<String,String>> aList;
private static String MATCH_URL = null;
private static final String TAG_MATCH="matching";
private static final String TAG_NAME="name";
private static final String TAG_PROFILE="profile_id";
private static final String TAG_IMAGE="image";
private static final String TAG_CAST="cast";
private static final String TAG_AGE="age";
private static final String TAG_LOCATION="location";
private ListView listview;
public HomeFragment(){}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
String strtext = getArguments().getString("user_login_id");
MATCH_URL = "http://mywebsitename.com/webservice/matching?version=apps&user_login_id="+strtext;
View rootView = inflater.inflate(R.layout.fragment_home, container, false);
aList = new ArrayList<HashMap<String,String>>();
// rowItems = new ArrayList<RowItem>();
listview=(ListView)rootView.findViewById(android.R.id.list);
new LoadAlbums().execute();
return rootView;
}
class LoadAlbums extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(HomeFragment.this.getActivity());
pDialog.setMessage("Loading...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
protected String doInBackground(String... args) {
ServiceHandler sh = new ServiceHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(MATCH_URL, ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
// Getting JSON Array node
matching = jsonObj.getJSONArray(TAG_MATCH);
// looping through All Contacts
for (int i = 0; i < matching.length(); i++) {
JSONObject c = matching.getJSONObject(i);
// Storing each json item values in variable
String user_name = c.getString(TAG_NAME);
String user_profile=c.getString(TAG_PROFILE);
String user_image=c.getString(TAG_IMAGE);
String user_cast=c.getString(TAG_CAST);
String user_age=c.getString(TAG_AGE);
String user_location=c.getString(TAG_LOCATION);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_NAME,user_name);
map.put(TAG_PROFILE, user_profile);
map.put(TAG_IMAGE, user_image);
map.put(TAG_CAST, user_cast);
map.put(TAG_AGE, user_age+" years");
map.put(TAG_LOCATION, user_location);
// adding HashList to ArrayList
aList.add(map);
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
return null;
}
protected void onPostExecute(String file_url) {
super.onPostExecute(file_url);
// dismiss the dialog after getting all albums
if (pDialog.isShowing())
pDialog.dismiss();
// updating UI from Background Thread
/**
* Updating parsed JSON data into ListView
* */
// updating listview
CustomAdapter adapter = new CustomAdapter(getActivity(),aList);
setListAdapter(adapter);
}
}
}
解决方案
Try to AndroidQuery with custom adapter :
public class CustomAdapter extends BaseAdapter {
private Context context;
private ArrayList<HashMap<String,String>> listData;
private AQuery aQuery;
private static final String TAG_NAME="name";
private static final String TAG_PROFILE="profile_id";
private static final String TAG_IMAGE="image";
private static final String TAG_CAST="cast";
private static final String TAG_AGE="age";
private static final String TAG_LOCATION="location";
public CustomAdapter(Context context,ArrayList<HashMap<String,String>> listData) {
this.context = context;
this.listData=listData;
aQuery = new AQuery(this.context);
}
@Override
public int getCount() {
return listData.size();
}
@Override
public Object getItem(int position) {
return listData.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
convertView = LayoutInflater.from(context).inflate(R.layout.list_item, null);
holder.propic = (ImageView) convertView.findViewById(R.id.propic);
holder.txtproname = (TextView) convertView.findViewById(R.id.txtproname);
holder.txtproid = (TextView) convertView.findViewById(R.id.txtproid);
holder.txtprofilecast = (TextView) convertView.findViewById(R.id.txtprofilecast);
holder.txtprofileage = (TextView) convertView.findViewById(R.id.txtprofileage);
holder.txtprofileplace = (TextView) convertView.findViewById(R.id.txtprofileplace);
convertView.setTag(holder);
}else{
holder = (ViewHolder) convertView.getTag();
}
holder.txtproname.setText(listData.get(position).get(TAG_NAME));
holder.txtproid.setText(listData.get(position).get(TAG_PROFILE));
holder.txtprofilecast.setText(listData.get(position).get(TAG_CAST));
holder.txtprofileage.setText(listData.get(position).get(TAG_AGE));
holder.txtprofileplace.setText(listData.get(position).get(TAG_LOCATION));
aQuery.id(holder.propic).image(listData.get(position).get(TAG_IMAGE),true,true,0,R.drawable.ic_launcher);
// image parameter : 1 : memory cache,2:file cache,3:target width,4:fallback image
return convertView;
}
class ViewHolder{
ImageView propic;
TextView txtproname;
TextView txtproid;
TextView txtprofilecast;
TextView txtprofileage;
TextView txtprofileplace;
}
}
How to set adapter to ListView :
CustomAdapter adapter = new CustomAdapter(getActivity(),aList);
setListAdapter(adapter);
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