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POHow to output to a view using JSON in android when retrieving SQL query
 

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  1. POHow to output to a view using JSON in android when retrieving SQL query
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    <p>I am trying to use JSON and HTTP client to retrieve data from a table in my database. The code I have seems to be working but it is not outputting anything, but if I change something on purpose in the query the error toast outputs, so I know the code is right as no error outputs. The problem is figuring out how to get the JSON output onto my view screen.</p> <p>Here is the complete HTTP code:</p> <pre><code>public void LoadRemote() { ArrayList&lt;NameValuePair&gt; nameValuePairs = new ArrayList&lt;NameValuePair&gt;(); //http post try{ HttpClient httpclient = new DefaultHttpClient(); HttpPost httppost = new HttpPost("http://deucalion0.co.uk/getscores.php"); httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); HttpResponse response = httpclient.execute(httppost); HttpEntity entity = response.getEntity(); is = entity.getContent(); }catch(Exception e){ Log.e("log_tag", "Error in http connection"+e.toString()); } //convert response to string try{ BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8); sb = new StringBuilder(); sb.append(reader.readLine() + "\n"); String line="0"; while ((line = reader.readLine()) != null) { sb.append(line + "\n"); } is.close(); result=sb.toString(); }catch(Exception e){ Log.e("log_tag", "Error converting result "+e.toString()); } //paring data int score; String username; try{ jArray = new JSONArray(result); JSONObject json_data=null; for(int i=0;i&lt;jArray.length();i++){ json_data = jArray.getJSONObject(i); score=json_data.getInt("score"); username=json_data.getString("username"); } } catch(JSONException e1){ Toast.makeText(getBaseContext(), "No City Found" ,Toast.LENGTH_LONG).show(); } catch (ParseException e1) { e1.printStackTrace(); } } </code></pre> <p>Here is my SQL query:</p> <pre><code>$sql=mysql_query("select score, username from highscores "); while($row=mysql_fetch_assoc($sql)) $output[]=$row; print(json_encode($output)); </code></pre> <p>You can see this working <a href="http://deucalion0.co.uk/getscores.php" rel="nofollow">here</a></p> <p>I would appreciate any advice on this issue.</p> <p>Thanks.</p> <p>I have started again due to complications, here is the activity class as it is now:</p> <pre><code>public class Viewscores extends Activity{ Button scores; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.viewscores); scores = (Button) findViewById(R.id.bViewscores); scores.setOnClickListener(new View.OnClickListener(){ public void onClick(View v) { LoadRemote(); } }); } public void LoadRemote() { String result = ""; ArrayList&lt;NameValuePair&gt; nameValuePairs = new ArrayList&lt;NameValuePair&gt;(); InputStream is = null; try{ HttpClient httpclient = new DefaultHttpClient(); HttpPost httppost = new HttpPost("http://deucalion0.co.uk/getscores.php"); httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); HttpResponse response = httpclient.execute(httppost); HttpEntity entity = response.getEntity(); is = entity.getContent(); }catch(Exception e){ Log.e("log_tag", "Error in http connection"+e.toString()); } BufferedReader myReader = new BufferedReader(new InputStreamReader(is)); } } </code></pre>
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