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POAndroid ListActivity
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  1. POAndroid ListActivity
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    copied!<blockquote> <p><strong>Possible Duplicate:</strong><br> <a href="https://stackoverflow.com/questions/12403957/android-listview-with-simple-adapter">Android ListView with Simple Adapter</a> </p> </blockquote> <p>This is my first Activity.</p> <pre><code>public class CheckAvailability extends Activity{ Button but1,but2; EditText brName; TextView txt1; String text; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.availability); brName =(EditText)findViewById(R.id.editText1); but1 = (Button)findViewById(R.id.button5); but2 = (Button)findViewById(R.id.button6); txt1 = (TextView)findViewById(R.id.textView3); but1.setOnClickListener(new View.OnClickListener(){ public void onClick(View v){ String result = null; InputStream is = null; StringBuilder sb=null; ArrayList&lt;NameValuePair&gt; postParameters = new ArrayList&lt;NameValuePair&gt;(); //ArrayList&lt;HashMap&lt;String, String&gt;&gt; contactList = new ArrayList&lt;HashMap&lt;String, String&gt;&gt;(); postParameters.add(new BasicNameValuePair("branchname", brName.getText().toString())); //http post try{ HttpClient httpclient = new DefaultHttpClient(); HttpPost httppost = new HttpPost("http://10.0.2.2:8080/hello/AvailabilityResponse"); httppost.setEntity(new UrlEncodedFormEntity(postParameters)); 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()); } Intent intent = new Intent(CheckAvailability.this , ListAtmActivity.class); intent.putExtra("key", result); startActivity(intent);} }); </code></pre> <p>from this Activity I'm calling my second activity with that results string. This is my second activity.</p> <pre><code> public class ListAtmActivity extends Activity{ private static String url ="http://10.0.2.2:8080/hello/AvailabilityResponse"; private static final String TAG_ID = "id"; private static final String ATM_NO = "atmbrno"; private static final String ATM_PLACE = "atmbrname"; static InputStream is = null; static String json = ""; static JSONArray jObj = null; JSONArray contacts=null; public class ListViewA extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.list_view2); ListView lv= (ListView)findViewById(R.id.listview); String[] from = new String[] {"col_1", "col_2"}; int[] to = new int[] { R.id.item2, R.id.item3}; String brName=getIntent().getExtras().getString("key"); List&lt;HashMap&lt;String, String&gt;&gt; fillMaps = new ArrayList&lt;HashMap&lt;String, String&gt;&gt;(); try { contacts = new JSONArray(brName); } catch (JSONException e) { // TODO Auto-generated catch block e.printStackTrace(); } try{ for(int i = 0; i &lt; contacts.length(); i++){ JSONObject json_data = contacts.getJSONObject(i); System.out.print(contacts.length()); String atm_id = json_data.getString(ATM_NO); String atm_name = json_data.getString(ATM_PLACE); HashMap&lt;String, String&gt; map = new HashMap&lt;String, String&gt;(); map.put("col_1", atm_id); map.put("col_2", atm_name); fillMaps.add(map); } } catch(JSONException e) { e.printStackTrace(); } SimpleAdapter adapter = new SimpleAdapter(this, fillMaps, R.layout.grid_item, from, to); lv.setAdapter(adapter); } }} </code></pre> <p>but I can't get any out put to my interface...only blank screen display. what's wrong with this?</p>
 

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