I am new on android. I create a list view , I used service handler to fetch data from server. I want to add image in my ListView and get images from server. The snippet of my code is following:
public class Home extends ListActivity {
private ProgressDialog pDialog;
// URL to get contacts JSON
private static String url = "http://api-11hr.anovatesoft.com/v1/list";
// JSON Node names
private static final String TAG_CONTACTS = "contacts";
private static final String TAG_USERNAME = "username";
private static final String TAG_NAME = "name";
private static final String TAG_EMAIL = "email";
private static final String TAG_ADDRESS = "address";
private static final String TAG_CONTACT_NUMBER = "contactnumber";
private static final String TAG_POSTAL_CODE = "postalcode";
private static final String TAG_IMAGE = "image";
SessionManager session;
private double latitude;
private double longitude;
private String apikey;
GPSTracker gps;
// contacts JSONArray
JSONArray contacts = null;
// Hashmap for ListView
ArrayList<HashMap<String, String>> contactList;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.home);
Gps_func();
// Session class instance
session = new SessionManager(getApplicationContext());
// get user data from session
HashMap<String, String> user = session.getUserDetails();
// apikey
// Calling Application class (see application tag in AndroidManifest.xml)
final GlobalClass globalVariable = (GlobalClass) getApplicationContext();
//Set name and email in global/application context
apikey = globalVariable.getApikey();
latitude = globalVariable.getLatitude();
longitude = globalVariable.getLongitude();
contactList = new ArrayList<HashMap<String, String>>();
ListView lv = getListView();
// Listview on item click listener
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String cost = ((TextView) view.findViewById(R.id.email))
.getText().toString();
// Starting single contact activity
Intent in = new Intent(getApplicationContext(),
Adds.class);
in.putExtra(TAG_EMAIL, cost);
startActivity(in);
}
});
// Calling async task to get json
new GetContacts().execute();
}
private void Gps_func() {
gps = new GPSTracker(Home.this);
// check if GPS enabled
if (gps.canGetLocation()) {
double latitude = gps.getLatitude();
double longitude = gps.getLongitude();
// \n is for new line
// Toast.makeText(getApplicationContext(), "Your Location is - \nLat: " + latitude + "\nLong: " + longitude, Toast.LENGTH_LONG).show();
Log.d("tag", "Longitude:\n" + longitude + "\n Latitude: \n" + latitude);
} else {
// can't get location
// GPS or Network is not enabled
// Ask user to enable GPS/network in settings
gps.showSettingsAlert();
if (gps.canGetLocation()) {
double latitude = gps.getLatitude();
double longitude = gps.getLongitude();
// \n is for new line
// Toast.makeText(getApplicationContext(), "Your Location is - \nLat: " + latitude + "\nLong: " + longitude, Toast.LENGTH_LONG).show();
Log.d("tag", "Longitude:\n" + longitude + "\n Latitude: \n" + latitude);
}
}
}
@Override
protected void onRestart() {
super.onRestart();
Gps_func();
}
/**
* Async task class to get json by making HTTP call
*/
private class GetContacts extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(Home.this);
pDialog.setMessage("Please wait....");
pDialog.setCancelable(false);
pDialog.show();
}
@Override
protected Void doInBackground(Void... arg0) {
// Creating service handler class instance
ServiceHandler1 sh = new ServiceHandler1(apikey, latitude, longitude);
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url, ServiceHandler1.POST);
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
// Getting JSON Array node
contacts = jsonObj.getJSONArray(TAG_CONTACTS);
// looping through All Contacts
for (int i = 0; i < contacts.length(); i++) {
JSONObject c = contacts.getJSONObject(i);
String username = c.getString(TAG_USERNAME);
String name = c.getString(TAG_NAME);
String email = c.getString(TAG_EMAIL);
String address = c.getString(TAG_ADDRESS);
String gender = c.getString(TAG_CONTACT_NUMBER);
String postalcode = c.getString(TAG_POSTAL_CODE);
// tmp hashmap for single contact
HashMap<String, String> contact = new HashMap<String, String>();
// adding each child node to HashMap key => value
contact.put(TAG_EMAIL, email);
// adding contact to contact list
contactList.add(contact);
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
return null;
}
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
Home.this, contactList,
R.layout.list_item1, new String[]{TAG_EMAIL,
}, new int[]{
R.id.email,});
setListAdapter(adapter);
}
}
}
The snippet for service handler is follow:
public class ServiceHandler1 {
private String apikey;
private double lati;
private double longi;
static String response = null;
public final static int GET = 1;
public final static int POST = 2;
public ServiceHandler1(String key, double latitude, double longitude) {
apikey=key;
lati=latitude;
longi=longitude;
}
/*
* Making service call
* @url - url to make request
* @method - http request method
* */
public String makeServiceCall(String url, int method) {
return this.makeServiceCall(url, method, null);
}
/*
* Making service call
* @url - url to make request
* @method - http request method
* @params - http request params
* */
public String makeServiceCall(String url, int method,
List<NameValuePair> params) {
try {
// http client
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpEntity httpEntity = null;
HttpResponse httpResponse = null;
// Checking http request method type
HttpPost httpPost = new HttpPost(url);
httpPost.setHeader("Authorization" , apikey);
// adding post params
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
// nameValuePairs.add(new BasicNameValuePair("address", "raiganj, west bengal"));
nameValuePairs.add(new BasicNameValuePair("lat", String.valueOf(lati)));
nameValuePairs.add(new BasicNameValuePair("long", String.valueOf(longi)));
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
httpResponse = httpClient.execute(httpPost);
httpEntity = httpResponse.getEntity();
response = EntityUtils.toString(httpEntity);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return response;
}
}
I get images as a link from API. So please help me out.
