I creating the phone tracking app, i want to get the data from the internet (actualy the latitude and longitude) from the device i tracked. the tracked phone is okay, they send the latitude and longitude every onLocationChanged executed to my database server. And for the tracking phone app i can get that data but just when oncreate once. i get the data using asynctask, The problem is i having difficluties to get that data every X minutes, should i use handler ? can somebody here help me with some code ?
Here is my code so far
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final String Url = "http://mysite.com/tes.php";
mf =(SupportMapFragment)getSupportFragmentManager().findFragmentById(R.id.map);
gmap = mf.getMap();
gmap.setMyLocationEnabled(true);
gmap.setMapType(gmap.MAP_TYPE_SATELLITE);
lat= (TextView) findViewById(R.id.lati);
longit = (TextView) findViewById(R.id.longi);
// TODO Auto-generated method stub
lokasibaru lokasi = new lokasibaru();
lokasi.execute(Url);
}
and this is my asynctask
private class lokasibaru extends AsyncTask <String,ArrayList<String>,ArrayList<String>>{
String latitude,longitude;
protected void onProgressUpdate(String... values) {
}
protected void onPostExecute(ArrayList<String> hasil) {
latitude = hasil.get(0);
longitude = hasil.get(1);
lat.setText(latitude);
longit.setText(longitude);
}
@Override
protected ArrayList<String> doInBackground(String... value) {
ArrayList<String> result = null ;
String Url = value[0];
koneksi get = new koneksi();
try {
//result = GetR.getdata(Url);
result = get.getdata(Url);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return result;
}
}
and this is my koneksi class to get the data from internet
public class koneksi {
public ArrayList<String> getdata(String url) throws Exception{
BufferedReader in = null;
String data = null;
ArrayList<String> kordinat = new ArrayList<String> ();
int count ;
try{
HttpClient client= new DefaultHttpClient();
URI site = new URI(url);
HttpGet req = new HttpGet();
req.setURI(site);
HttpResponse resp = client.execute(req);
count =0;
in = new BufferedReader(new InputStreamReader(resp.getEntity().getContent()));
StringBuffer sb = new StringBuffer("");
String l = "";
String nl = System.getProperty("line.separator");
while ((l = in.readLine()) != null ){
//sb.append(l+nl);
kordinat.add(l);
count++;
}
in.close();
data = sb.toString();
return kordinat;
}
finally{
}
}
}
Use a handler
private Handler m_handler = new Handler();
// ..............
Runnable m_handlerTask = new Runnable() {
@Override
public void run() {
m_handler.postDelayed(m_handlerTask, Xmins);
new lokasibaru().execute();
}
};
private void startGettingDataTask()
{
m_handlerTask.run();
}
private void stopGettingDataTask()
{
m_handler.removeCallbacks(m_handlerTask);
}
Call startGettingDataTask()
to start and stopGettingDataTask()
to remove the callbacks!
Look into Android Service , within the service create a ScheduledExecutorService which starts a Runnable task that request the page and sends the location.
To the ScheduledExecutorService you can pass the time interval like so,
//this will run the task every 5 minutes
scheduleTaskExecutor.scheduleAtFixedRate(task, 0, 5, TimeUnit.MINUTES);
For below API 9
//this will run the task every 5 minutes
scheduleTaskExecutor.scheduleAtFixedRate(task, 0, 300, TimeUnit.SECONDS);
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