Android

Step 1 C:\\Users\\rajesh.mandal\\AndroidStudioProjects\\JsonList\\app\\src\\main\\res\\layout\\activity_main.xml Step 2 C:\\Users\\rajesh.mandal\\AndroidStudioProjects\\JsonList\\app\\src\\main\\res\\layout\\list_item.xml Step 3 C:\\Users\\rajesh.mandal\\AndroidStudioProjects\\JsonList\\app\\src\\main\\AndroidManifest.xml Step 4 C:\\Users\\rajesh.mandal\\AndroidStudioProjects\\JsonList\\app\\src\\main\\java\\com\\example\\ rajeshmandal\\jsonlist\\MainActivity.java package com.example.rajeshmandal.jsonlist; import android.os.AsyncTask; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.Log; import android.widget.ListAdapter; import android.widget.ListView; import android.widget.SimpleAdapter; import android.widget.Toast; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import java.util.ArrayList; import java.util.HashMap; public class MainActivity extends AppCompatActivity { private String TAG = MainActivity.class.getSimpleName(); private ListView lv; ArrayList> contactList; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); contactList = new ArrayList<>(); lv = (ListView) findViewById(R.id.list); new GetContacts().execute(); } private class GetContacts extends AsyncTask { @Override protected void onPreExecute() { super.onPreExecute(); Toast.makeText(MainActivity.this,\"Json Data is downloading\",Toast.LENGTH_LONG).show(); } @Override protected Void doInBackground(Void... arg0) { HttpHandler sh = new HttpHandler(); // Making a request to url and getting response String url = \"http://webphplearn.com/api/datalist.php\"; String jsonStr = sh.makeServiceCall(url); Log.e(TAG, \"Response from url444444: \" + jsonStr); if (jsonStr != null) { try { JSONObject jsonObj = new JSONObject(jsonStr); // Getting JSON Array node JSONArray contacts = jsonObj.getJSONArray(\"contacts\"); // looping through All Contacts for (int i = 0; i < contacts.length(); i++) { JSONObject c = contacts.getJSONObject(i); String user_id = c.getString(\"user_id\"); String user_name = c.getString(\"user_name\"); String email_id = c.getString(\"email_id\"); String first_name = c.getString(\"first_name\"); String mobile_no = c.getString(\"mobile_no\"); // tmp hash map for single contact HashMap contact = new HashMap<>(); // adding each child node to HashMap key => value contact.put(\"user_id\", user_id); contact.put(\"user_name\", user_name); contact.put(\"email_id\", email_id); contact.put(\"first_name\", first_name); contact.put(\"mobile_no\", mobile_no); // adding contact to contact list contactList.add(contact); } } catch (final JSONException e) { Log.e(TAG, \"Json parsing error11111: \" + e.getMessage()); runOnUiThread(new Runnable() { @Override public void run() { Toast.makeText(getApplicationContext(), \"Json parsing error22222: \" + e.getMessage(), Toast.LENGTH_LONG).show(); } }); } } else { Log.e(TAG, \"Couldn\'t get json from server.\"); runOnUiThread(new Runnable() { @Override public void run() { Toast.makeText(getApplicationContext(), \"Couldn\'t get json from server. Check LogCat for possible errors!\", Toast.LENGTH_LONG).show(); } }); } return null; } @Override protected void onPostExecute(Void result) { super.onPostExecute(result); ListAdapter adapter = new SimpleAdapter(MainActivity.this, contactList, R.layout.list_item, new String[]{ \"user_id\",\"user_name\",\"email_id\",\"first_name\",\"mobile_no\"}, new int[]{R.id.user_id, R.id.user_name, R.id.email_id, R.id.first_name, R.id.mobile_no}); lv.setAdapter(adapter); } } } Step 5 C:\\Users\\rajesh.mandal\\AndroidStudioProjects\\JsonList\\app\\src\\main\\java\\com\\example\\ rajeshmandal\\jsonlist\\HttpHandler.java package com.example.rajeshmandal.jsonlist; import android.util.Log; import java.io.BufferedInputStream; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.ProtocolException; import java.net.URL; public class HttpHandler { private static final String TAG = HttpHandler.class.getSimpleName(); public HttpHandler() { } public String makeServiceCall(String reqUrl) { String response = null; try { URL url = new URL(reqUrl); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod(\"GET\"); // read the response InputStream in = new BufferedInputStream(conn.getInputStream()); response = convertStreamToString(in); } catch (MalformedURLException e) { Log.e(TAG, \"MalformedURLException: \" + e.getMessage()); } catch (ProtocolException e) { Log.e(TAG, \"ProtocolException: \" + e.getMessage()); } catch (IOException e) { Log.e(TAG, \"IOException: \" + e.getMessage()); } catch (Exception e) { Log.e(TAG, \"Exception: \" + e.getMessage()); } return response; } private String convertStreamToString(InputStream is) { BufferedReader reader = new BufferedReader(new InputStreamReader(is)); StringBuilder sb = new StringBuilder(); String line; try { while ((line = reader.readLine()) != null) { sb.append(line).append(\'\\n\'); } } catch (IOException e) { e.printStackTrace(); } finally { try { is.close(); } catch (IOException e) { e.printStackTrace(); } } return sb.toString(); } } Step 6 C:\\Users\\rajesh.mandal\\AndroidStudioProjects\\JsonList\\app\\src\\main\\res\\layout\\ rounded_border_textview.xml