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POJson Parsing using Async Task and BaseAdapter
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  1. POJson Parsing using Async Task and BaseAdapter
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    copied!<p>I'm accessing <a href="http://graph.facebook.com/xyz" rel="nofollow">http://graph.facebook.com/xyz</a> and displaying name,id and gender in <code>ListView</code>. I don't know how to call the result from <code>doInBackground</code> and BaseAdapter.</p> <pre><code>public class FbMainActivity extends Activity { Button b; ListView lv; DefaultHttpClient client; HttpGet get; HttpResponse response; HttpEntity entity; ArrayList&lt;FBAccount&gt; al; MyAdapter adapter; TextView tv1, tv2, tv3; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_fb_main); b = (Button) findViewById(R.id.bFAce); tv1 = (TextView) findViewById(R.id.textView1); tv2 = (TextView) findViewById(R.id.textView2); tv3 = (TextView) findViewById(R.id.textView3); lv = (ListView) findViewById(R.id.list); al = new ArrayList&lt;FBAccount&gt;(); adapter = new MyAdapter(); lv.setAdapter(adapter); b.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { MyOperation operation = new MyOperation(); operation.execute(); } }); } private class MyOperation extends AsyncTask&lt;String, Void, String&gt; { ProgressDialog dialog = new ProgressDialog(FbMainActivity.this); @Override protected void onPreExecute() { // TODO Auto-generated method stub super.onPreExecute(); dialog.setMessage("Loading...."); dialog.show(); } @Override protected String doInBackground(String... params) { // TODO Auto-generated method stub client = new DefaultHttpClient(); get = new HttpGet("http://graph.facebook.com/somename"); try { response = client.execute(get); } catch (ClientProtocolException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } entity = response.getEntity(); InputStream is = null; try { is = entity.getContent(); } catch (IllegalStateException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } BufferedReader reader = new BufferedReader( new InputStreamReader(is)); StringBuffer buffer = new StringBuffer(); String line = null; do { try { line = reader.readLine(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } buffer.append(line); } while (line != null); String str = buffer.toString(); FBAccount account; JSONObject object; try { object = new JSONObject(str); String id = object.getString("id"); String name = object.getString("name"); String gender = object.getString("gender"); account = new FBAccount(); account.setId(id); account.setName(name); account.setGender(gender); al.add(account); } catch (JSONException e) { // TODO Auto-generated catch block e.printStackTrace(); } adapter.notifyDataSetChanged(); return str; } @Override protected void onPostExecute(String result) { // TODO Auto-generated method stub super.onPostExecute(result); dialog.dismiss(); } } private class MyAdapter extends BaseAdapter { @Override public int getCount() { // TODO Auto-generated method stub return al.size(); } @Override public Object getItem(int position) { // TODO Auto-generated method stub return al.get(position); } @Override public long getItemId(int position) { // TODO Auto-generated method stub return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub LinearLayout layout = (LinearLayout) getLayoutInflater().inflate( R.layout.cust_layout, null); String id = al.get(position).getId(); String name = al.get(position).getName(); String gender = al.get(position).getGender(); tv1.setText(id); tv2.setText(name); tv3.setText(gender); return layout; } } </code></pre> <p>}</p>
 

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