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POAccessing a single PHP file from two different activites in android
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  1. POAccessing a single PHP file from two different activites in android
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    copied!<p>I have two activites: <code>Mainpage.java</code> and <code>Secondary.java</code>. And I am trying to access the same php file from both the class. When the second class is called the following <strong><em>error</em></strong> is revoked.</p> <pre><code> java.lang.nullpointerexception. </code></pre> <p>How can i remove this error?</p> <p>This is causing the apllication to force close. Thanks. This the code for the first class: void login(){ try{ </p> <pre><code> httpclient=new DefaultHttpClient(); httppost= new HttpPost("http://10.0.2.2/ABC/login.php"); nameValuePairs = new ArrayList&lt;NameValuePair&gt;(2); nameValuePairs.add(new BasicNameValuePair("username",et.getText().toString().trim())); nameValuePairs.add(new BasicNameValuePair("password",pass.getText().toString().trim())); nameValuePairs.add(new BasicNameValuePair("action","LOGIN")); httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); ResponseHandler&lt;String&gt; responseHandler = new BasicResponseHandler(); response=httpclient.execute(httppost); final String response = httpclient.execute(httppost, responseHandler); System.out.println("Response : " + response); tv.setText("Response from PHP : " + response); if(response.equalsIgnoreCase("User Found")) { Toast.makeText(Axdroid.this,"Login Success",Toast.LENGTH_SHORT).show(); startActivity(new Intent(getApplicationContext(),Secondary.class)); } else { showAlert(); } dialog.dismiss(); }catch(Exception e){ System.out.println("Exception : " + e.getMessage()); } </code></pre> <p>}</p> <p>And this for the secondary class void jsr(){</p> <pre><code> try{ httpclient = new DefaultHttpClient(); httppost= new HttpPost("http://10.0.2.2/AndroidLeave/login.php"); nameValuePairs.add(new BasicNameValuePair("action","SUMMARY")); httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); response = httpclient.execute(httppost); System.out.println(" ++++++++ +++++++++++++"+response); entity = response.getEntity(); is = entity.getContent(); }catch(Exception e){ Log.e("log_tag", "Error in http connection"+e.toString()); } System.out.println(" ++++++++ After getting data from PHP file +++++++++++++"); //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());} }} </code></pre> <p>LOGCAT:</p> <pre><code> 10-26 18:10:01.313: W/SingleClientConnManager(2296): Make sure to release the connection before allocating another one. 10-26 18:10:01.964: E/log_tag(2296): Error in http connectionjava.lang.NullPointerException 10-26 18:10:01.974: E/log_tag(2296): Error converting result java.lang.NullPointerException </code></pre>
 

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