JSON的Android和ListViewAndr、JSON、ListView、oid
2023-09-12 22:21:51
作者：心痛像条线
我在找一个很好的教程来解析JSON到列表视图中的Android。
问题是我的JSON文件是这样的
[{LOCATION_ID：823，的company_id：41，名：Milj \ u00f8station，地址：Aldersro \ / Aldersro 8","place":"","postal":"5700","city":"Svendborg","monday":"","tuesday":"","wednesday":"","thursday":"","friday":"","saturday":"","sunday":"","type":"2","lat":"55.061426149085","lng":"10.5927246809006","nocar":"0","distance":"0.00023254303859579"}]
开始一个JSON阵列，以及后来的数据大部分教程。我知道有很多的例子，但我不能找到一些它与我的问题。
我加code，但它不工作，这是我的3个班。
SingleMenuItemActivity
公共类SingleMenuItemActivity延伸活动{
// JSON节点键
私有静态最后弦乐TAG_NAME =名;
私有静态最后弦乐TAG_EMAIL =电子邮件;
私有静态最后弦乐TAG_PHONE_MOBILE =移动;
@覆盖
公共无效的onCreate（包savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.single_list_item）;
//获取意图数据
意图= getIntent（）;
//从previous意图JSON值
字符串名称= in.getStringExtra（TAG_NAME）;
串成本= in.getStringExtra（TAG_EMAIL）;
字符串描述= in.getStringExtra（TAG_PHONE_MOBILE）;
//显示所有的值在屏幕上
TextView的lblName =（TextView中）findViewById（R.id.name_label）;
TextView的lblCost =（TextView中）findViewById（R.id.email_label）;
TextView的lblDesc =（TextView中）findViewById（R.id.mobile_label）;
lblName.setText（名称）;
lblCost.setText（成本）;
lblDesc.setText（介绍）;
}}
JSONParser
公共类JSONParser {
静态的InputStream是= NULL;
静态的JSONObject jObj = NULL;
静态JSON字符串=;
//构造
公共JSONParser（）{
}
公众的JSONObject getJSONFromUrl（字符串URL）{
//使HTTP请求
尝试 {
// defaultHttpClient
DefaultHttpClient的HttpClient =新DefaultHttpClient（）;
HttpPost httpPost =新HttpPost（URL）;
HTT presponse HTT presponse = httpClient.execute（httpPost）;
HttpEntity httpEntity = HTT presponse.getEntity（）;
是= httpEntity.getContent（）;
}赶上（UnsupportedEncodingException E）{
e.printStackTrace（）;
}赶上（ClientProtocolException E）{
e.printStackTrace（）;
}赶上（IOException异常E）{
e.printStackTrace（）;
}
尝试 {
的BufferedReader读卡器=新的BufferedReader（新的InputStreamReader（
是，ISO-8859-1），8）;
StringBuilder的SB =新的StringBuilder（）;
串线= NULL;
而（（行= reader.readLine（））！= NULL）{
sb.append（行+\ N）;
}
is.close（）;
JSON = sb.toString（）;
}赶上（例外五）{
Log.e（缓冲区错误，转换的结果错误+ e.toString（））;
}
//尝试解析字符串到一个JSON对象
尝试 {
jObj =新的JSONObject（JSON）;
}赶上（JSONException E）{
Log.e（JSON解析器，错误分析数据+ e.toString（））;
}
//返回JSON字符串
返回jObj;
}}
AndroidJSONParserActvity
公共类AndroidJSONParsingActivity扩展ListActivity {
// URL进行申请
私有静态字符串URL = "http://webservice.xxx.com/webservice/getLocationList.php?lat=55.061424255371094&lng=10.592724800109863";
// JSON节点名称
私有静态最后弦乐TAG_LOCATION =LOCATION_ID;
私有静态最后弦乐TAG_Company =的company_id;
私有静态最后弦乐TAG_NAME =名;
私有静态最后弦乐TAG_ADDRESS =地址;
私有静态最后弦乐TAG_PLACE =地方;
私有静态最后弦乐TAG_POSTAL =邮;
私有静态最后弦乐TAG_CITY =城市;
私有静态最后弦乐TAG_MONDAY =星期一;
私有静态最后弦乐TAG_TUESDAY =星期二;
私有静态最后弦乐TAG_WEDNESDAY =星期三;
私有静态最后弦乐TAG_THURSDAY =星期四;
私有静态最后弦乐TAG_FRIDAY =星期五;
私有静态最后弦乐TAG_SATURDAY =星期六;
私有静态最后弦乐TAG_SUNDAY =星期天;
私有静态最后弦乐TAG_TYPE =类型;
私有静态最后弦乐TAG_LAT =纬度;
私有静态最后弦乐TAG_LNG =液化天然气;
私有静态最后弦乐TAG_NOCAR =nocar;
//联系人JSONArray
JSONArray接触= NULL;
@覆盖
公共无效的onCreate（包savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.main）;
//哈希映射为的ListView
ArrayList的＆LT; HashMap的＆LT;字符串，字符串＆GT;＆GT; contactList =新的ArrayList＆LT; HashMap的＆LT;字符串，字符串＆GT;＆GT;（）;
//创建JSON解析器实例
JSONParser jParser =新JSONParser（）;
//从URL获取JSON字符串
JSONObject的JSON = jParser.getJSONFromUrl（URL）;
尝试 {
//遍历所有联系人
的for（int i = 0; I＆LT; contacts.length（）;我++）{
JSONObject的C = contacts.getJSONObject（我）;
//保存在变量中的每个JSON项目
字符串LOCATION_ID = c.getString（TAG_LOCATION）;
字符串的company_id = c.getString（TAG_Company）;
字符串名称= c.getString（TAG_NAME）;
字符串的地址= c.getString（TAG_ADDRESS）;
字符串的地方= c.getString（TAG_PLACE）;
字符串邮政= c.getString（TAG_POSTAL）;
字符串的城市= c.getString（TAG_CITY）;
字符串星期一= c.getString（TAG_MONDAY）;
字符串周二= c.getString（TAG_TUESDAY）;
字符串周三= c.getString（TAG_WEDNESDAY）;
字符串星期四= c.getString（TAG_THURSDAY）;
字符串周五= c.getString（TAG_FRIDAY）;
字符串周六= c.getString（TAG_SATURDAY）;
字符串星期日= c.getString（TAG_SUNDAY）;
字符串类型= c.getString（TAG_TYPE）;
字符串纬度= c.getString（TAG_LAT）;
字符串LNG = c.getString（TAG_LNG）;
字符串nocar = c.getString（TAG_NOCAR）;
//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_LOCATION，LOCATION_ID）;
map.put（TAG_Company，的company_id）;
map.put（TAG_NAME，姓名）;
map.put（TAG_ADDRESS，地址）;
map.put（TAG_PLACE，地点）;
map.put（TAG_POSTAL，邮政）;
map.put（TAG_CITY，市）;
map.put（TAG_MONDAY，星期一）;
map.put（TAG_TUESDAY，星期二）;
map.put（TAG_WEDNESDAY，星期三）;
map.put（TAG_THURSDAY，星期四）;
map.put（TAG_FRIDAY，星期五）;
map.put（TAG_SATURDAY，星期六）;
map.put（TAG_SUNDAY，星期日）;
map.put（TAG_TYPE，类型）;
map.put（TAG_LAT，纬度）;
map.put（TAG_LNG，LNG）;
map.put（TAG_NOCAR，nocar）;
//添加HashList到ArrayList中
contactList.add（图）
}
}赶上（JSONException E）{
e.printStackTrace（）;
}
/ **
*更新解析JSON数据到ListView控件
* * /
ListAdapter适配器=新SimpleAdapter（这一点，contactList，
R.layout.list_item，
新的String [] {TAG_NAME，TAG_LAT，TAG_Company}，新的INT [] {
R.id.name，R.id.email，R.id.mobile}）;
setListAdapter（适配器）;
//选择单一的ListView项
ListView的LV = getListView（）;
//启动新的页面中选择单列表项
lv.setOnItemClickListener（新OnItemClickListener（）{
@覆盖
公共无效onItemClick（适配器视图＆LT;＆GT;母公司视图中查看，
INT位置，长的id）{
//从选择列表项获得价值
字符串名称=（（TextView中）view.findViewById（R.id.name））的getText（）的toString（）。
串成本=（（TextView中）view.findViewById（R.id.email））的getText（）的toString（）。
字符串描述=（（TextView中）view.findViewById（R.id.mobile））的getText（）的toString（）。
//开始的新意图
意图=新的意图（getApplicationContext（），SingleMenuItemActivity.class）;
in.putExtra（TAG_NAME，姓名）;
in.putExtra（TAG_LOCATION，成本）;
in.putExtra（TAG_Company，说明）;
startActivity（在）;
}
}）;
}}
错误日志中的猫
10月2号至6号：06：19.025：D / AbsListView（9115）：获得MotionRecognitionManager 10月2号至6号：06：19.705：D / dalvikvm（9115）：GC_CONCURRENT释放206K，免费6％12315K / 12999K，暂停13毫秒+ 14毫秒，40毫秒总额10月2日至6日：06：19.725：E / JSON解析器（9115）：错误解析数据org.json.JSONException：值[{"nocar":"0","company_id":"41","postal":"5700","thursday":"","monday":"","lng":"10.5927246809006","type":"2","city":"Svendborg","location_id":"823","distance":"0.00023254303859579","wednesday":"","address":"Aldersro \ / Aldersro 8","sunday":"","name":"Miljøstation","saturday":"","friday":"","tuesday":"","place":"","lat":"55.061426149085"},
十月2号至6日：06：19.730：D / AndroidRuntime（9115）：关闭虚拟机
十月2号至6日：06：19.730：W / dalvikvm（9115）：主题ID = 1：螺纹退出与未捕获的异常（组= 0x4100f2a0）
十月2号至6日：06：19.740：E / AndroidRuntime（9115）：致命异常：主要
十月2号至6日：06：19.740：E / AndroidRuntime（9115）：java.lang.RuntimeException的：无法启动的活动ComponentInfo {com.androidhive.jsonparsing / com.androidhive.jsonparsing.AndroidJSONParsingActivity}：显示java.lang.NullPointerException
十月2号至6日：06：19.740：E / AndroidRuntime（9115）：在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2100）
十月2号至6日：06：19.740：E / AndroidRuntime（9115）：在android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:2125）
十月2号至6日：06：19.740：E / AndroidRuntime（9115）：在android.app.ActivityThread.access $ 600（ActivityThread.java:140）
十月2号至6日：06：19.740：E / AndroidRuntime（9115）：在android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1227）
十月2号至6日：06：19.740：E / AndroidRuntime（9115）：在android.os.Handler.dispatchMessage（Handler.java:99）
十月2号至6日：06：19.740：E / AndroidRuntime（9115）：在android.os.Looper.loop（Looper.java:137）
十月2号至6日：06：19.740：E / AndroidRuntime（9115）：在android.app.ActivityThread.main（ActivityThread.java:4898）
十月2号至6日：06：19.740：E / AndroidRuntime（9115）：在java.lang.reflect.Method.invokeNative（本机方法）
十月2号至6日：06：19.740：E / AndroidRuntime（9115）：在java.lang.reflect.Method.invoke（Method.java:511）
十月2号至6日：06：19.740：E / AndroidRuntime（9115）：在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:1006）
十月2号至6日：06：19.740：E / AndroidRuntime（9115）：在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:773）
十月2号至6日：06：19.740：E / AndroidRuntime（9115）：在dalvik.system.NativeStart.main（本机方法）
十月2号至6日：06：19.740：E / AndroidRuntime（9115）：由：显示java.lang.NullPointerException
十月2号至6日：06：19.740：E / AndroidRuntime（9115）：在com.androidhive.jsonparsing.AndroidJSONParsingActivity.onCreate（AndroidJSONParsingActivity.java:69）
十月2号至6日：06：19.740：E / AndroidRuntime（9115）：在android.app.Activity.performCreate（Activity.java:5206）
十月2号至6日：06：19.740：E / AndroidRuntime（9115）：在android.app.Instrumentation.callActivityOnCreate（Instrumentation.java:1083）
十月2号至6日：06：19.740：E / AndroidRuntime（9115）：在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2064）
十月2号至6日：06：19.740：E / AndroidRuntime（9115）：11 ...更多
解决方案
由于你的web服务返回一个 JSONArray 而不是的JSONObject 但你正试图将其转换为JSONObject的。改变，而不是的JSONObject 的 getJSONFromUrl 方法的返回类型为 JSONArray 如：
公共JSONArray getJSONFromUrl（字符串URL）{
JSONArray jsonarr = NULL;
//使HTTP请求
//尝试解析字符串到JSONArray
尝试 {
jsonarr =新JSONArray（JSON）;
}赶上（JSONException E）{
}
//返回JSON字符串
返回jsonarr; //＆LT;＆LT;＆LT;＆LT;返回JSONArray代替的JSONObject
}
和呼叫 getJSONFromUrl 从活动中的onCreate：
JSONArray JSON = jParser.getJSONFromUrl（URL）;
尝试 {
//遍历所有联系人
的for（int i = 0; I＆LT; json.length（）;我++）{
JSONObject的C = json.getJSONObject（我）;
//把你分析code在这里
}
}赶上（JSONException E）{
e.printStackTrace（）;
}
I'm looking for a good tutorial to parse JSON into Listview in Android.
The problem is my JSON file is like this
[{"location_id":"823","company_id":"41","name":"Milj\u00f8station","address":"Aldersro \/ Aldersro 8","place":"","postal":"5700","city":"Svendborg","monday":"","tuesday":"","wednesday":"","thursday":"","friday":"","saturday":"","sunday":"","type":"2","lat":"55.061426149085","lng":"10.5927246809006","nocar":"0","distance":"0.00023254303859579"}]
Most tutorials starting with a Json array, and later the data. I know there is a lot of examples but i couldn't find some it that match my problem.
I added code, but still it's not working, here is my 3 classes.
SingleMenuItemActivity
public class SingleMenuItemActivity extends Activity {
// JSON node keys
private static final String TAG_NAME = "name";
private static final String TAG_EMAIL = "email";
private static final String TAG_PHONE_MOBILE = "mobile";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.single_list_item);
// getting intent data
Intent in = getIntent();
// Get JSON values from previous intent
String name = in.getStringExtra(TAG_NAME);
String cost = in.getStringExtra(TAG_EMAIL);
String description = in.getStringExtra(TAG_PHONE_MOBILE);
// Displaying all values on the screen
TextView lblName = (TextView) findViewById(R.id.name_label);
TextView lblCost = (TextView) findViewById(R.id.email_label);
TextView lblDesc = (TextView) findViewById(R.id.mobile_label);
lblName.setText(name);
lblCost.setText(cost);
lblDesc.setText(description);
} }
JSONParser
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
public JSONObject getJSONFromUrl(String url) {
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
} }
AndroidJSONParserActvity
public class AndroidJSONParsingActivity extends ListActivity {
// url to make request
private static String url = "http://webservice.xxx.com/webservice/getLocationList.php?lat=55.061424255371094&lng=10.592724800109863";
// JSON Node names
private static final String TAG_Location = "location_id";
private static final String TAG_Company = "company_id";
private static final String TAG_NAME = "name";
private static final String TAG_ADDRESS = "address";
private static final String TAG_PLACE = "place";
private static final String TAG_POSTAL = "postal";
private static final String TAG_CITY = "city";
private static final String TAG_MONDAY = "monday";
private static final String TAG_TUESDAY = "tuesday";
private static final String TAG_WEDNESDAY = "wednesday";
private static final String TAG_THURSDAY = "thursday";
private static final String TAG_FRIDAY = "friday";
private static final String TAG_SATURDAY = "saturday";
private static final String TAG_SUNDAY = "sunday";
private static final String TAG_TYPE = "type";
private static final String TAG_LAT = "lat";
private static final String TAG_LNG = "lng";
private static final String TAG_NOCAR = "nocar";
// contacts JSONArray
JSONArray contacts = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Hashmap for ListView
ArrayList<HashMap<String, String>> contactList = new ArrayList<HashMap<String, String>>();
// Creating JSON Parser instance
JSONParser jParser = new JSONParser();
// getting JSON string from URL
JSONObject json = jParser.getJSONFromUrl(url);
try {
// looping through All Contacts
for(int i = 0; i < contacts.length(); i++){
JSONObject c = contacts.getJSONObject(i);
// Storing each json item in variable
String location_id = c.getString(TAG_Location);
String company_id = c.getString(TAG_Company);
String name = c.getString(TAG_NAME);
String address = c.getString(TAG_ADDRESS);
String place = c.getString(TAG_PLACE);
String postal = c.getString(TAG_POSTAL);
String city = c.getString(TAG_CITY);
String monday = c.getString(TAG_MONDAY);
String tuesday = c.getString(TAG_TUESDAY);
String wednesday = c.getString(TAG_WEDNESDAY);
String thursday = c.getString(TAG_THURSDAY);
String friday = c.getString(TAG_FRIDAY);
String saturday = c.getString(TAG_SATURDAY);
String sunday = c.getString(TAG_SUNDAY);
String type = c.getString(TAG_TYPE);
String lat = c.getString(TAG_LAT);
String lng = c.getString(TAG_LNG);
String nocar = c.getString(TAG_NOCAR);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_Location, location_id);
map.put(TAG_Company, company_id);
map.put(TAG_NAME, name);
map.put(TAG_ADDRESS, address);
map.put(TAG_PLACE, place);
map.put(TAG_POSTAL, postal);
map.put(TAG_CITY, city);
map.put(TAG_MONDAY, monday);
map.put(TAG_TUESDAY, tuesday);
map.put(TAG_WEDNESDAY, wednesday);
map.put(TAG_THURSDAY, thursday);
map.put(TAG_FRIDAY, friday);
map.put(TAG_SATURDAY, saturday);
map.put(TAG_SUNDAY, sunday);
map.put(TAG_TYPE, type);
map.put(TAG_LAT, lat);
map.put(TAG_LNG, lng);
map.put(TAG_NOCAR, nocar);
// adding HashList to ArrayList
contactList.add(map);
}
} catch (JSONException e) {
e.printStackTrace();
}
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(this, contactList,
R.layout.list_item,
new String[] { TAG_NAME, TAG_LAT, TAG_Company }, new int[] {
R.id.name, R.id.email, R.id.mobile });
setListAdapter(adapter);
// selecting single ListView item
ListView lv = getListView();
// Launching new screen on Selecting Single ListItem
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String name = ((TextView) view.findViewById(R.id.name)).getText().toString();
String cost = ((TextView) view.findViewById(R.id.email)).getText().toString();
String description = ((TextView) view.findViewById(R.id.mobile)).getText().toString();
// Starting new intent
Intent in = new Intent(getApplicationContext(), SingleMenuItemActivity.class);
in.putExtra(TAG_NAME, name);
in.putExtra(TAG_Location, cost);
in.putExtra(TAG_Company, description);
startActivity(in);
}
});
} }
Error in Log Cat
02-06 10:06:19.025: D/AbsListView(9115): Get MotionRecognitionManager 02-06 10:06:19.705: D/dalvikvm(9115): GC_CONCURRENT freed 206K, 6% free 12315K/12999K, paused 13ms+14ms, total 40ms 02-06 10:06:19.725: E/JSON Parser(9115): Error parsing data org.json.JSONException: Value [{"nocar":"0","company_id":"41","postal":"5700","thursday":"","monday":"","lng":"10.5927246809006","type":"2","city":"Svendborg","location_id":"823","distance":"0.00023254303859579","wednesday":"","address":"Aldersro \/ Aldersro 8","sunday":"","name":"Miljøstation","saturday":"","friday":"","tuesday":"","place":"","lat":"55.061426149085"},
02-06 10:06:19.730: D/AndroidRuntime(9115): Shutting down VM
02-06 10:06:19.730: W/dalvikvm(9115): threadid=1: thread exiting with uncaught exception (group=0x4100f2a0)
02-06 10:06:19.740: E/AndroidRuntime(9115): FATAL EXCEPTION: main
02-06 10:06:19.740: E/AndroidRuntime(9115): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.androidhive.jsonparsing/com.androidhive.jsonparsing.AndroidJSONParsingActivity}: java.lang.NullPointerException
02-06 10:06:19.740: E/AndroidRuntime(9115): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2100)
02-06 10:06:19.740: E/AndroidRuntime(9115): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2125)
02-06 10:06:19.740: E/AndroidRuntime(9115): at android.app.ActivityThread.access$600(ActivityThread.java:140)
02-06 10:06:19.740: E/AndroidRuntime(9115): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1227)
02-06 10:06:19.740: E/AndroidRuntime(9115): at android.os.Handler.dispatchMessage(Handler.java:99)
02-06 10:06:19.740: E/AndroidRuntime(9115): at android.os.Looper.loop(Looper.java:137)
02-06 10:06:19.740: E/AndroidRuntime(9115): at android.app.ActivityThread.main(ActivityThread.java:4898)
02-06 10:06:19.740: E/AndroidRuntime(9115): at java.lang.reflect.Method.invokeNative(Native Method)
02-06 10:06:19.740: E/AndroidRuntime(9115): at java.lang.reflect.Method.invoke(Method.java:511)
02-06 10:06:19.740: E/AndroidRuntime(9115): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
02-06 10:06:19.740: E/AndroidRuntime(9115): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
02-06 10:06:19.740: E/AndroidRuntime(9115): at dalvik.system.NativeStart.main(Native Method)
02-06 10:06:19.740: E/AndroidRuntime(9115): Caused by: java.lang.NullPointerException
02-06 10:06:19.740: E/AndroidRuntime(9115): at com.androidhive.jsonparsing.AndroidJSONParsingActivity.onCreate(AndroidJSONParsingActivity.java:69)
02-06 10:06:19.740: E/AndroidRuntime(9115): at android.app.Activity.performCreate(Activity.java:5206)
02-06 10:06:19.740: E/AndroidRuntime(9115): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1083)
02-06 10:06:19.740: E/AndroidRuntime(9115): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2064)
02-06 10:06:19.740: E/AndroidRuntime(9115): ... 11 more
解决方案
because your webservice returning an JSONArray instead of JSONObject but you are trying to convert it to JSONObject . change your getJSONFromUrl method return type to JSONArray instead of JSONObject as :
public JSONArray getJSONFromUrl(String url) {
JSONArray jsonarr=null;
// Making HTTP request
// try parse the string to a JSONArray
try {
jsonarr = new JSONArray(json);
} catch (JSONException e) {
}
// return JSON String
return jsonarr; //<<<< return JSONArray instead of JSONObject
}
and call getJSONFromUrl as from onCreate of Activity :
JSONArray json = jParser.getJSONFromUrl(url);
try {
// looping through All Contacts
for(int i = 0; i < json.length(); i++){
JSONObject c = json.getJSONObject(i);
// put your parsing code here
}
} catch (JSONException e) {
e.printStackTrace();
}
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