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我現在有一個問題，解析JSON數據。 有幹啥錯我的JSON數據或怎麼回事， 我找不到我的錯誤。 ALways如果我運行我的應用程序這一個也崩潰，因爲我的JSON是空的。JSON數據解析問題
我的JSON：
{
"android":[
{
"ver": "1.5",
"name": "Cupcake",
"api": "API level 3"
},
{
"ver": "1.6",
"name": "Donut",
"api": "API level 4"
},
{
"ver": "2.0-2.1",
"name": "Eclair",
"api": "API level 5-7"
},
{
"ver": "2.2",
"name": "Froyo",
"api": "API level 8"
},
{
"ver": "2.3",
"name": "Gingerbread",
"api": "API level 9-10"
},
{
"ver": "3.0-3.2",
"name": "Honeycomb",
"api": "API level 11-13"
},
{
"ver": "4.0",
"name": "Ice Cream Sandwich",
"api": "API level 14-15"
},
{
"ver": "4.1-4.3",
"name": "JellyBean",
"api": "API level 16-18"
},
{
"ver": "4.4",
"name": "KitKat",
"api": "API level 19"
}
]
}
從logcat的輸出：
Error parsing data org.json.JSONException: Unterminated array at character 15 of {n"android":[n{n"ver": "1.5",n"name": "Cupcake",n"api": "API level 3"n},n{n"ver": "1.6",n"name": "Donut",n"api": "API level 4"n},n{n"ver": "2.0-2.1",n"name": "Eclair",n"api": "API level 5-7"n},n{n"ver": "2.2",n"name": "Froyo",n"api": "API level 8"n},n{n"ver": "2.3",n"name": "Gingerbread",n"api": "API level 9-10"n},n{n"ver": "3.0-3.2",n"name": "Honeycomb",n"api": "API level 11-13"n},n{n"ver": "4.0",n"name": "Ice Cream Sandwich",n"api": "API level 14-15"n},n{n"ver": "4.1-4.3",n"name": "JellyBean",n"api": "API level 16-18"n},n{n"ver": "4.4",n"name": "KitKat",n"api": "API level 19"n}n]n}n
MainAct：
import java.util.ArrayList;
import java.util.HashMap;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
ListView list;
TextView ver;
TextView name;
TextView api;
Button Btngetdata;
ArrayList<HashMap<String, String>> oslist = new ArrayList<HashMap<String, String>>();
//URL to get JSON Array
private static String url = "*****";
//JSON Node Names
private static final String TAG_OS = "android";
private static final String TAG_VER = "ver";
private static final String TAG_NAME = "name";
private static final String TAG_API = "api";
JSONArray android = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
oslist = new ArrayList<HashMap<String, String>>();
Btngetdata = (Button)findViewById(R.id.getdata);
Btngetdata.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
new JSONParse().execute();
}
});
}
private class JSONParse extends AsyncTask<String, String, JSONObject> {
private ProgressDialog pDialog;
@Override
protected void onPreExecute() {
super.onPreExecute();
ver = (TextView)findViewById(R.id.vers);
name = (TextView)findViewById(R.id.name);
api = (TextView)findViewById(R.id.api);
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Getting Data ...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
@Override
protected JSONObject doInBackground(String... args) {
JSONParser jParser = new JSONParser();
// Getting JSON from URL
JSONObject json = jParser.getJSONFromUrl(url);
return json;
}
@Override
protected void onPostExecute(JSONObject json) {
pDialog.dismiss();
try {
// Getting JSON Array from URL
android = json.getJSONArray(TAG_OS);
for(int i = 0; i < android.length(); i++){
JSONObject c = android.getJSONObject(i);
// Storing JSON item in a Variable
String ver = c.getString(TAG_VER);
String name = c.getString(TAG_NAME);
String api = c.getString(TAG_API);
// Adding value HashMap key => value
HashMap<String, String> map = new HashMap<String, String>();
map.put(TAG_VER, ver);
map.put(TAG_NAME, name);
map.put(TAG_API, api);
oslist.add(map);
list=(ListView)findViewById(R.id.list);
ListAdapter adapter = new SimpleAdapter(MainActivity.this, oslist,
R.layout.list_v,
new String[] { TAG_VER,TAG_NAME, TAG_API }, new int[] {
R.id.vers,R.id.name, R.id.api});
list.setAdapter(adapter);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Toast.makeText(MainActivity.this, "You Clicked at "+oslist.get(+position).get("name"), Toast.LENGTH_SHORT).show();
}
});
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}
JSONParser：
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;
import android.util.Log;
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;
}
}
檢出對我有效，看起來像你上面列出的例子中沒有出現錯誤輸出中的額外'n'。 – draksia
請分享您的代碼 – meda
剛剛編輯 – user3530080