问题描述
只得到第一个事件的天使在名称列表,无论我做第二或第三个事件或任何其他事件挖掘..
我想,只要用户不敲击事件本田汽车需要出示天使A和B,每当用户做水龙头的事件塔塔汽车需要出示天使C&放大器; ð....我在我的JSON大约200事件和1000的天使,有50某些事件或某种有200天使,但我需要显示窃听事件只天使.....
JSON: -
[
{
eventName的:本田汽车,
angelList:[
{
angelID:1,
angelName:天使A
},
{
angelID:2,
angelName:天使B
}
]
},
{
eventName的:塔塔汽车
angelList:[
{
angelID:1,
angelName:天使C
},
{
angelID:2,
angelName:天使D
}
]
}
]
为例,首先是事件名称本田汽车,有两个天使天使A,B和第二个事件名称是塔塔汽车公司,这一事件有两个天使天使,即C,天使ð....,我的问题是,每当我做轻按塔塔汽车公司获得天使A,天使的B列表,而不是显示天使C,天使ð...
code: -
//创建JSON解析器对象
JSONParser jsonParser =新JSONParser(); ArrayList的<&HashMap的LT;字符串,字符串>> angelsList; //天使JSONArray
JSONArray arrayAngels = NULL;保护字符串doInBackground(字符串参数... args){
清单<&的NameValuePair GT; PARAMS =新的ArrayList<&的NameValuePair GT;();
// URL从获取JSON字符串
JSON字符串= jsonParser.makeHtt prequest(EventsActivity.URL_JSON,GET,则params);
的JSONObject jsonData;
尝试{
jsonData =新JSONArray(JSON).getJSONObject(0);
arrayAngels = jsonData.optJSONArray(angelList); 如果(arrayAngels!= NULL){ //通过所有天使循环
的for(int i = 0; I< arrayAngels.length();我++){
JSONObject的C = arrayAngels.getJSONObject(I)
//存储在变量中的每个JSON项值
字符串名称= c.getString(ANGEL_NAME);
//创建新的HashMap
HashMap的<字符串,字符串>地图=新的HashMap<字符串,字符串>();
//将每个子节点的HashMap键=>值
map.put(ANGEL_NAME,名);
//添加HashList到ArrayList的
angelsList.add(地图);
}
}
}赶上(JSONException E){
e.printStackTrace();
}
返回null;
}
完成code: -
公共类AngelsActivity扩展ListActivity { //连接器
ConnectionDetector CD; //警报对话框经理
AlertDialogManager警报=新AlertDialogManager(); //进度对话框
私人ProgressDialog pDialog; //创建JSON解析器对象
JSONParser jsonParser =新JSONParser(); ArrayList的<&HashMap的LT;字符串,字符串>> angelsList; //天使JSONArray
JSONArray arrayAngels = NULL; 字符串intentEvents = NULL; 公共静态最后弦乐LOG_TAG =AngelsActivity; // JSON节点名称
私有静态最后弦乐ANGEL_NAME =angelName; @覆盖
公共无效的onCreate(捆绑savedInstanceState){
super.onCreate(savedInstanceState);
的setContentView(R.layout.activity_list); CD =新ConnectionDetector(getApplicationContext()); //检查互联网连接
如果(!cd.isConnectingToInternet()){
//没有Internet连接present
alert.showAlertDialog(AngelsActivity.this,网络连接错误
请连接的Internet连接,FALSE);
//停止执行回code
返回;
} //获取事件名称使用意图(来自EventsActivity)
意向I = getIntent();
intentEvents =(i.getStringExtra(EVENT_NAME)); //为哈希映射的ListView
angelsList =新的ArrayList<&HashMap的LT;字符串,字符串>>(); //加载天使JSON在后台线程
新LoadAngels()执行(); //获取列表视图
ListView控件LV = getListView(); lv.setOnItemClickListener(新android.widget.AdapterView.OnItemClickListener(){
@覆盖
公共无效onItemClick(适配器视图<>为arg0,观景,INT ARG2,
长ARG3){ }
});
} / **
*背景异步任务通过HTTP请求加载所有天使
* * /
类LoadAngels扩展的AsyncTask<字符串,字符串,字符串> { / **
*启动后台线程显示进度对话框之前
* * /
@覆盖
在preExecute保护无效(){
super.on preExecute();
pDialog =新ProgressDialog(AngelsActivity.this);
pDialog.setMessage(加载数据......);
pDialog.setIndeterminate(假);
pDialog.setCancelable(假);
pDialog.show();
} 保护字符串doInBackground(字符串参数... args){
清单<&的NameValuePair GT; PARAMS =新的ArrayList<&的NameValuePair GT;();
// URL从获取JSON字符串
JSON字符串= jsonParser.makeHtt prequest(EventsActivity.URL_JSON,GET,则params);
JSONArray jsonData;
尝试{
jsonData =新JSONArray(JSON);
对于(INT J = 0; J< jsonData.length(); J ++){
arrayAngels = jsonData.getJSONObject(J).optJSONArray(angelList); 如果(arrayAngels!= NULL){ //通过所有天使循环
的for(int i = 0; I< arrayAngels.length();我++){
Log.d(AngelsActivity.LOG_TAGarrayAngels.length+ arrayAngels.length());
JSONObject的C = arrayAngels.getJSONObject(I)
//存储在变量中的每个JSON项值
字符串名称= c.getString(ANGEL_NAME);
//创建新的HashMap
HashMap的<字符串,字符串>地图=新的HashMap<字符串,字符串>();
//将每个子节点的HashMap键=>值
map.put(ANGEL_NAME,名);
//添加HashList到ArrayList的
angelsList.add(地图);
}
}
}
}赶上(JSONException E){
e.printStackTrace();
}
返回null;
} / **
*在完成后台任务之后辞退进度对话框
* ** /
保护无效onPostExecute(字符串FILE_URL){
//让所有天使后关闭该对话框
pDialog.dismiss();
//从后台线程更新界面
runOnUiThread(新的Runnable(){
公共无效的run(){
/ **
*更新解析JSON数据到ListView控件
* * /
ListAdapter适配器=新SimpleAdapter(
AngelsActivity.this,angelsList,
R.layout.list_item,
新的String [] {} ANGEL_NAME,
新的INT [] {R.id.name}); //更新列表视图
setListAdapter(适配器); 与事件名称//改变活动标题
的setTitle(intentEvents);
}
});
}
}
}
在您的适配器,变化 jsonData =新JSONArray(JSON).getJSONObject(0);
按 jsonData =新JSONArray(JSON).getJSONObject(yourPosition);
Getting only first Event's Angel Names in a List, either i do tap on second or third event or any other Event..
i want whenever user do tap on Event Honda Motors need to show Angel A & B, and whenever user do tap on Event Tata Motors need to show Angel C & D....i have around 200 events in my json and over 1000 angels, some events having 50 or some having 200 angels, but i need to show Angels for tapped Event only.....
JSON :-
[
{
"eventName" : "Honda Motors",
"angelList" : [
{
"angelID": "1",
"angelName": "Angel A"
},
{
"angelID": "2",
"angelName": "Angel B"
}
]
},
{
"eventName" : "Tata Motors",
"angelList" : [
{
"angelID": "1",
"angelName": "Angel C"
},
{
"angelID": "2",
"angelName": "Angel D"
}
]
}
]
for an example, first EventName is Honda Motors, having two Angels Angel A, B and second EventName is Tata Motors, this event has two more Angels namely Angel C, Angel D .... and my issue is whenever i do tap on Tata Motors getting Angel A, Angel B in a List, instead of showing Angel C, Angel D...
Code :-
// Creating JSON Parser object
JSONParser jsonParser = new JSONParser();
ArrayList<HashMap<String, String>> angelsList;
// angels JSONArray
JSONArray arrayAngels = null;
protected String doInBackground(String... args) {
List<NameValuePair> params = new ArrayList<NameValuePair>();
// getting JSON string from URL
String json = jsonParser.makeHttpRequest(EventsActivity.URL_JSON, "GET", params);
JSONObject jsonData;
try {
jsonData = new JSONArray(json).getJSONObject(0);
arrayAngels = jsonData.optJSONArray("angelList");
if (arrayAngels != null) {
// looping through all angels
for (int i = 0; i < arrayAngels.length(); i++) {
JSONObject c = arrayAngels.getJSONObject(i);
// Storing each json item values in variable
String name = c.getString(ANGEL_NAME);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(ANGEL_NAME, name);
// adding HashList to ArrayList
angelsList.add(map);
}
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
Complete code:-
public class AngelsActivity extends ListActivity {
// Connection detector
ConnectionDetector cd;
// Alert dialog manager
AlertDialogManager alert = new AlertDialogManager();
// Progress Dialog
private ProgressDialog pDialog;
// Creating JSON Parser object
JSONParser jsonParser = new JSONParser();
ArrayList<HashMap<String, String>> angelsList;
// angels JSONArray
JSONArray arrayAngels = null;
String intentEvents = null;
public static final String LOG_TAG = "AngelsActivity";
// JSON node names
private static final String ANGEL_NAME = "angelName";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list);
cd = new ConnectionDetector(getApplicationContext());
// Check for internet connection
if (!cd.isConnectingToInternet()) {
// Internet Connection is not present
alert.showAlertDialog(AngelsActivity.this, "Internet Connection Error",
"Please connect to working Internet connection", false);
// stop executing code by return
return;
}
// Get EventName using Intent (from EventsActivity)
Intent i = getIntent();
intentEvents = (i.getStringExtra("event_name"));
// Hashmap for ListView
angelsList = new ArrayList<HashMap<String, String>>();
// Loading Angels JSON in Background Thread
new LoadAngels().execute();
// get listview
ListView lv = getListView();
lv.setOnItemClickListener(new android.widget.AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View view, int arg2,
long arg3) {
}
});
}
/**
* Background Async Task to Load all Angels by making http request
* */
class LoadAngels extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(AngelsActivity.this);
pDialog.setMessage("Loading Data ...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
protected String doInBackground(String... args) {
List<NameValuePair> params = new ArrayList<NameValuePair>();
// getting JSON string from URL
String json = jsonParser.makeHttpRequest(EventsActivity.URL_JSON, "GET", params);
JSONArray jsonData;
try {
jsonData = new JSONArray(json);
for (int j = 0; j < jsonData.length(); j++) {
arrayAngels = jsonData.getJSONObject(j).optJSONArray("angelList");
if (arrayAngels != null) {
// looping through all angels
for (int i = 0; i < arrayAngels.length(); i++) {
Log.d(AngelsActivity.LOG_TAG, "arrayAngels.length " + arrayAngels.length());
JSONObject c = arrayAngels.getJSONObject(i);
// Storing each json item values in variable
String name = c.getString(ANGEL_NAME);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(ANGEL_NAME, name);
// adding HashList to ArrayList
angelsList.add(map);
}
}
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog after getting all angels
pDialog.dismiss();
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
AngelsActivity.this, angelsList,
R.layout.list_item,
new String[] {ANGEL_NAME},
new int[] {R.id.name });
// updating listview
setListAdapter(adapter);
// Change activity Title with Event Name
setTitle(intentEvents);
}
});
}
}
}
In your adapter, change jsonData = new JSONArray(json).getJSONObject(0);
by jsonData = new JSONArray(json).getJSONObject(yourPosition);
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