Today we get on with our series that
will connect our Android applications to internet webservices!
Next up in line: from JSON to a
Listview. A lot of this
project is identical to the previous post in
this series so try to look there first if you have any problems. On the bottom
of the post ill add the Eclipse project with the source.
For this example i made use of an already existing JSON
webservice locatedhere.
This is a piece of the JSON array that gets returned:
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01
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{"earthquakes":
[
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02
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{
|
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03
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"eqid":
"c0001xgp",
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04
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"magnitude":
8.8,
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|
05
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"lng":
142.369,
|
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06
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"src":
"us",
|
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07
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"datetime":
"2011-03-11 04:46:23",
|
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08
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"depth":
24.4,
|
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11
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{
|
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12
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"eqid":
"2007hear",
|
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13
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"magnitude":
8.4,
|
|
14
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"lng":
101.3815,
|
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15
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"src":
"us",
|
|
16
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"datetime":
"2007-09-12 09:10:26",
|
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17
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"depth":
30,
|
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18
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"lat":
-4.5172
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So how do we get this data into our application! Behold
our getJSON class!
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01
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public static JSONObject
getJSONfromURL(String url){
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02
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03
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//initialize
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04
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InputStream
is = null;
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05
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String
result = "";
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06
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JSONObject
jArray = null;
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09
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try{
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10
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HttpClient
httpclient = new DefaultHttpClient();
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11
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HttpPost
httppost = new HttpPost(url);
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12
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HttpResponse
response = httpclient.execute(httppost);
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13
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HttpEntity
entity = response.getEntity();
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14
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is
= entity.getContent();
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15
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16
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}catch(Exception
e){
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17
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Log.e("log_tag", "Error
in http connection "+e.toString());
|
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18
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}
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19
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20
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//convert
response to string
|
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21
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try{
|
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22
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BufferedReader
reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);
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23
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StringBuilder
sb = new StringBuilder();
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24
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String
line = null;
|
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25
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while ((line = reader.readLine()) != null) {
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sb.append(line
+ "\n");
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29
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result=sb.toString();
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}catch(Exception
e){
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31
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Log.e("log_tag", "Error
converting result "+e.toString());
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32
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}
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33
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//try
parse the string to a JSON object
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35
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try{
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jArray
= new JSONObject(result);
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작성일 : 12-06-11 15:41
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