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  1. POActivity closes when there is no internet connection
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    <p>My activity gets force closed when there is no internet connection.How do I prevent this? I am thinking of showing a message to the user that there is no internet connection if it is not connected.In which all ways should I change the code? Thanks in advance</p> <pre><code>public class Myclass extends BaseActivity { private String[] imageUrls; private DisplayImageOptions options; private InputStream is; private String result; @SuppressLint("NewApi") @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.ac_image_grid); imageUrls = new String[1000]; try{ HttpClient httpclient = new DefaultHttpClient(); HttpPost httppost = new HttpPost(D.url+"gal.php"); List nameValuepairss = new ArrayList(1); // adding attributes to List nameValuepairss.add(new BasicNameValuePair("type","gal_living")); httppost.setEntity(new UrlEncodedFormEntity(nameValuepairss)); HttpResponse response = httpclient.execute(httppost); HttpEntity entity = response.getEntity(); is = entity.getContent(); Log.e("log_tag", "connection success username"); }catch(Exception e){ Log.e("log_tag", "Error in http connection "+e.toString()); Toast.makeText(getApplicationContext(), "fail1", Toast.LENGTH_SHORT).show(); } //convert response to string 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(); result=sb.toString(); }catch(Exception e){ Log.e("log_tag", "Error converting result :::"+e.toString()); // Toast.makeText(getApplicationContext(), "fail1", Toast.LENGTH_SHORT).show(); } try{ JSONArray jArray = new JSONArray(result); int arrayLength=jArray.length(); final String url[]=new String[arrayLength]; for(int i=0;i&lt;arrayLength;i++){ JSONObject json_data = jArray.getJSONObject(i); url[i]=json_data.getString("url"); } List&lt;String&gt; urls = new ArrayList&lt;String&gt;(); urls.addAll(Arrays.asList(url)); imageUrls = urls.toArray(new String[0]); } catch(JSONException e){ Log.e("log_tag", "Error parsing data:::::again? "+e.toString()); } options = new DisplayImageOptions.Builder() .showStubImage(R.drawable.stub_image) .showImageForEmptyUri(R.drawable.image_for_empty_url) .cacheInMemory() .cacheOnDisc() .build(); GridView gridView = (GridView) findViewById(R.id.gridview); gridView.setAdapter(new ImageAdapter()); gridView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView&lt;?&gt; parent, View view, int position, long id) { startImageGalleryActivity(position); } }); } private void startImageGalleryActivity(int position) { Intent intent = new Intent(this, ImagePagerActivity.class); intent.putExtra(Extra.IMAGES, imageUrls); intent.putExtra(Extra.IMAGE_POSITION, position); startActivity(intent); } public class ImageAdapter extends BaseAdapter { @Override public int getCount() { return imageUrls.length; } @Override public Object getItem(int position) { return null; } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { final ImageView imageView; if (convertView == null) { imageView = (ImageView) getLayoutInflater().inflate(R.layout.item_grid_image, parent, false); } else { imageView = (ImageView) convertView; } imageLoader.displayImage(imageUrls[position], imageView, options, new SimpleImageLoadingListener() { @Override public void onLoadingComplete(Bitmap loadedImage) { Animation anim = AnimationUtils.loadAnimation(LivingGrid.this, R.anim.fade_in); imageView.setAnimation(anim); anim.start(); } }); return imageView; }}} </code></pre>
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