Google Maps android IndexOutOfBoundsException

Google Maps android IndexOutOfBoundsException - java

I am trying to get markers placed on the map and fly to their destination. within a forloop i have an if statement, i wish it to do this:
for(i loop){
If (array(i) == null{ spawn plane code}
else {move plane code}
here is the code:
package com.fly.plane;
import java.sql.Time;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import com.fly.plane.R;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.MapView;
import com.google.android.gms.maps.Projection;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
import android.R.array;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.graphics.Point;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.os.SystemClock;
import android.support.v4.app.FragmentActivity;
import android.text.format.DateFormat;
import android.util.Log;
import android.view.View;
import android.view.animation.Interpolator;
import android.view.animation.LinearInterpolator;
import android.widget.TextView;
public class MyMapActivity extends ListActivity {
private ProgressDialog pDialog;
// URL to get data JSON
private static String url = "http://edmundgentle.com/snippets/flights/api.php";
// JSON Node speeds
private static final String TAG_data = "data";
private static final String TAG_BEARING = "bearing";
private static final String TAG_SPEED = "speed";
private static final String TAG_ARR = "arr";
private static final String TAG_ARR_TIME = "time";
private static final String TAG_ARR_LAT = "lat";
private static final String TAG_ARR_LON = "lon";
private static final String TAG_DEP = "dep";
private static final String TAG_DEP_TIME = "time";
private static final String TAG_DEP_LAT = "lat";
private static final String TAG_DEP_LON = "lon";
// data JSONArray
JSONArray data = null;
// Hashmap for ListView
ArrayList<HashMap<String, Double>> contactList;
// Hashmap for ListView
ArrayList<Double> ct;
List<Marker> markers = new ArrayList<Marker>();
//final Handler handler;
private GoogleMap mMap;
public static final LatLng dest(Double alt,Double aln, int i){
//final double latitude = Double.parseDouble(alt);
//final double longitude = Double.parseDouble(aln);
return new LatLng(alt, aln);
}
public double latt = -15.48169437461;
public double lng = -15.48169437461;
public ArrayList<Integer> dLat;
public String[] markerList;
public String dlat;
public String dlon;
public String alat;
public String alon;
private int count;
public boolean wait = true;
//private Button startB;
public TextView text;
Timer timing;
double time = 600;
double timm = 1;
long timer = 18000000;
long newTime;
TextView tv, test;
Thread t;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my_map);
contactList = new ArrayList<HashMap<String, Double>>();
ct = new ArrayList<Double>();
//ListView lv = getListView();
//create markers
new Getdata().execute();
// timer showing time of day in fast time
t = new Thread() {
#Override
public void run() {
try {
while (!isInterrupted()) {
Thread.sleep(600);
runOnUiThread(new Runnable() {
#Override
public void run() {
timer = timer +60000;
if (timer >= 64000000) timer = 18000000;
newTime = timer;
// update TextView here!
//String time = "HH:mm:ss";
//tv.setText(DateFormat.format(time , timer));
tv.setText(Double.toString(time));
test.setText(Double.toString(timm));
//tv.setText(Double.toString(contactList.get(20).get("time")));
//Timer();
}
});
}
} catch (InterruptedException e) {
}
}
};
tv = new TextView(this);
test = new TextView(this);
tv=(TextView)findViewById(R.id.timer);
test=(TextView)findViewById(R.id.test);
// run the mUpdateUITimerTask's run() method in 10 seconds from now
}
// animate each plane
public void animateMarker(final Marker marker , final LatLng toPosition,
final boolean hideMarker, final double spd) {
float speed = (float) spd;// Float.parseFloat(spd);
final Handler handler = new Handler();
final long start = SystemClock.uptimeMillis();
Projection proj = mMap.getProjection();
Point startPoint = proj.toScreenLocation(marker.getPosition());
final LatLng startLatLng = proj.fromScreenLocation(startPoint);
final float duration = 10 * speed;
final Interpolator interpolator = new LinearInterpolator();
handler.post(new Runnable() {
#Override
public void run() {
long elapsed = SystemClock.uptimeMillis() - start;
float t = interpolator.getInterpolation((float) ((float) elapsed
/ duration));
double lng = t * toPosition.longitude + (1 - t)
* startLatLng.longitude;
double lat = t * toPosition.latitude + (1 - t)
* startLatLng.latitude;
marker.setPosition(new LatLng(lat, lng));
if (t < 1.0) {
// Post again 16ms later.
handler.postDelayed(this, 16);
} else {
handler.postDelayed(this, 16);
if (hideMarker) {
marker.setVisible(false);
} else {
marker.setVisible(true);
}
}
}
});
}
public void Timer(){
//TimerTask tasknew = new TimerTask();
timing = new Timer();
timing.schedule(new CreateMarker(), 1000, 1000);
}
public String calcCurPos(double curlat, double curlon, double deslat, double deslon, double avgSpd, double bearing){
double distance = avgSpd * 0.0167;
// check if degrees or radians
//deslat = distance * Math.cosh(bearing);
//double retLat = curlat + deslat;
//double dPhi = Math.log(Math.tan(retLat/2+Math.PI/4)/Math.tan(curlat/2+Math.PI/4));
//double q = deslat/dPhi deslat/dPhi : Math.cos(curlat);
bearing = bearing * Math.PI / 180;
int radius = 6371;
double nextLat = Math.asin(Math.sin(curlat)* Math.cos(distance/radius)
+ Math.cos(curlat)*Math.sin(distance/radius)*Math.cos(bearing));
double nextLon = curlon + Math.atan2(Math.sin(bearing)* Math.sin(distance/ radius)
* Math.cos(curlat), Math.cos(distance/radius)-Math.sin(curlat) * Math.sin(nextLat));
nextLat = (nextLat * 180) / Math.PI;
nextLon = (nextLon * 180) / Math.PI;
/**
* Warning might want to convert them to string prior to return.
*/
return nextLat + ";" + nextLon;
}
public class CreateMarker extends TimerTask{
#Override
public void run() {
// TODO Auto-generated method stub
// print test
//tv.setText(Double.toString(time));
//tv.setText(Double.toString(time));
if (time >= 2400){
time=0;
}
time += 1;
//mMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();
for (int i =0; i < 100;i++){
// get data from array list
final double depLat = contactList.get(i).get("dlat");
final double depLon = contactList.get(i).get("dlon");
final double arLat = contactList.get(i).get("alat");
final double arLon = contactList.get(i).get("alon");
final double spd = contactList.get(i).get("speed");
final double dTime = contactList.get(i).get("time");
double curLat = contactList.get(i).get("clat");
double curLon = contactList.get(i).get("clon");
final double bearing = contactList.get(i).get("bearing");
final int j = i;
//int dTime = Integer.parseInt(dtime);
double oldLat = curLat;
if (time >= dTime)
{
if (curLat < arLat || curLat > 0){
String latlng = calcCurPos(curLat, curLon, arLat, arLon ,spd, bearing );
String[] values = latlng.split(";");
curLat = Double.parseDouble(values[0]);
curLon = Double.parseDouble(values[1]);
final double crLat = curLat;
final double crLon = curLon;
final LatLng position = new LatLng(crLat,crLon);
/*Marker mo = mMap.addMarker(new MarkerOptions()
.position(new LatLng(depLat, depLon))
.icon(BitmapDescriptorFactory.fromResource(R.drawable.planemarker)));*/
//DrawMarker();
//animateMarker(markers.get(i), position , true, spd);
try{
if (markers.get(i) == null){
//timm += 1;
timm += 1;
runOnUiThread(new Runnable() {
#Override
public void run() {
final Marker marker = mMap.addMarker(new MarkerOptions()
.position(new LatLng(depLat, depLon))
.title("Hello world")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.planemarker)));
markers.add(marker);
//marker.setVisible(false);
//animateMarker(markers.get(j), new LatLng(arLat,arLon) , true, spd);
//Marker marker = markers.get(i);
//marker.setPosition(position);
}
});
}
else //(markers.get(i) != null){
{
Marker marker = markers.get(i);
marker.setPosition(position);
marker.setVisible(false);
//animateMarker(markers.get(i), position , true, spd);
}
}
catch(NullPointerException npe)
{
//do something else
}
}
}
}
//return null;
}
}
/**
* Async task class to get json by making HTTP call
* */
private class Getdata extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(MyMapActivity.this);
pDialog.setMessage("Please wait...");
pDialog.setCancelable(false);
pDialog.show();
}
#Override
protected Void doInBackground(Void... arg0) {
// Creating service handler class instance
HTTPHandler sh = new HTTPHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url, HTTPHandler.GET);
Log.d("Response: ", "> " + jsonStr);
boolean limit = false;
if (jsonStr != null || limit == false) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
// Getting JSON Array node
data = jsonObj.getJSONArray(TAG_data);
// looping through All data
for (int i = 0; i < data.length(); i++) {
JSONObject c = data.getJSONObject(i);
String bearing = c.getString(TAG_BEARING);
String spd = c.getString(TAG_SPEED);
// departure node is JSON Object
JSONObject dep = c.getJSONObject(TAG_DEP);
String dtime = dep.getString(TAG_DEP_TIME);
//String dlat = dep.getString(TAG_DEP_LAT);
//String dlon = dep.getString(TAG_DEP_LON);
dlat = dep.getString(TAG_DEP_LAT);
dlon = dep.getString(TAG_DEP_LON);
// replace : and last 2 0's from departure time
dtime = dtime.replaceAll(":","");
//dtime.replaceAll(";","");
dtime = dtime.substring(0,dtime.length()-2);
// arrival node is JSON Object
JSONObject arr = c.getJSONObject(TAG_ARR);
String alt = arr.getString(TAG_ARR_LAT);
String aln = arr.getString(TAG_ARR_LON);
// convert data positions to doubles for Google Maps + stuff
double brng = Double.parseDouble(bearing);
brng = brng * Math.PI / 180;
double speed = Double.parseDouble(spd);
//double brng = Double.parseDouble(bearing);
double dLatitude = Double.parseDouble(dlat);
double dLongitude = Double.parseDouble(dlon);
double aLatitude = Double.parseDouble(alt);
double aLongitude = Double.parseDouble(aln);
double cLatitude = Double.parseDouble(dlat);
double cLongitude = Double.parseDouble(dlon);
double dtme = Double.parseDouble(dtime);
// tmp hashmap for single contact
HashMap<String, Double> contact = new HashMap<String, Double>();
contact.put("bearing", brng);
contact.put("speed", speed);
contact.put("time", dtme);
contact.put("alat", aLatitude);
contact.put("alon", aLongitude);
contact.put("dlat", dLatitude);
contact.put("dlon", dLongitude);
contact.put("clat", cLatitude);
contact.put("clon", cLongitude);
// adding contact to contact list
contactList.add(contact);
if (i== data.length()){
wait = false;
}
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
return null;
}
// spawns planes when json loaded
#Override
protected void onPostExecute(Void result) {
Timer();
t.start();
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
// use plane api for latlon
mMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();
//for (int i = 0; i < contactList.size() ; i++)
}}
}
and here is the error message:
02-26 21:53:42.031: E/AndroidRuntime(14970): FATAL EXCEPTION: Timer-0
02-26 21:53:42.031: E/AndroidRuntime(14970): java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0
02-26 21:53:42.031: E/AndroidRuntime(14970): at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)
02-26 21:53:42.031: E/AndroidRuntime(14970): at java.util.ArrayList.get(ArrayList.java:308)
02-26 21:53:42.031: E/AndroidRuntime(14970): at com.fly.plane.MyMapActivity$CreateMarker.run(MyMapActivity.java:395)
02-26 21:53:42.031: E/AndroidRuntime(14970): at java.util.Timer$TimerImpl.run(Timer.java:284)
i understand that the markers.get(i) is causing the problem, but i dont know how to check if the markers array is null without it throwing this error.
Any help would be appreciated.

You can use Map<Integer, Marker> (Integer are keys and Marker are values). Then you can leverage Map.get() which don't throws Exception if key is Integer and not null (your i will not be null in your code).
Declare markers as Map:
Map<Integer, Marker> markers = new HashMap<Integer, Marker>();
Inside CreateMarker.run() after final LatLng position = new LatLng(crLat,crLon); change as follows:
//implicit boxing to use int in Map
Integer ii = Integer.valueOf(i);
//try to get marker by index from map (index is the key)
Marker markerByIndex = markers.get(ii);
//Map.get() returns null if object by specified key is not in map
if (markerByIndex == null){
//marker doesn't exists - create it, add to Google Map and to Map by key
timm += 1;
runOnUiThread(new Runnable() {
#Override
public void run() {
final Marker marker = mMap.addMarker(new MarkerOptions()
.position(new LatLng(depLat, depLon))
.title("Hello world")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.planemarker)));
//put marker to map using i as a key
markers.put(ii, marker);
}
});
} else {
//marker exists, mutate it
markerByIndex.setPosition(position);
markerByIndex.setVisible(false);
//...replace the marker in map
markers.put(ii, markerByIndex);
//animate the marker
animateMarker(markerByIndex, position , true, spd);
}

You wrote:
i understand that the markers.get(i) is causing the problem, but i dont know how to check if the markers array is null without it throwing this error.
==> you can check it this way:
if (markers != null && markers.size() > 0) {
//there are actually markers. Calling markers.get(i) should work!
//...as long as i is smaller than markers.size()
} else {
//sorry, no markers! Don't call markers.get(i) here...
}

Related

Why mMap.addMarker (...) and map.getMyLocation(); dont work and stop my app android?

In sqlite the same method work, but I changed the database to Mysql, this method does not work!
i send arraylist(names) from AsyncTask to show method in MapsActivity
and probleme in ligne
myLocation = mMap.getMyLocation();
and
mMap.addMarker(new MarkerOptions().position(dz).title("welcome to")).showInfoWindow();
public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {
public void mark(Double latitude, Double longitude) {
LatLng dz = new LatLng(latitude, longitude);
mMap.addMarker(new MarkerOptions().position(dz).title("welcome to")).showInfoWindow();
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(dz, 16));
}
public float distanceBetween(Double latitude, Double longitude) {
float result[] = new float[10];
Location myLocation = mMap.getMyLocation();
Double mylatitude = myLocation.getLatitude();
Double mylongitude = myLocation.getLongitude();
myLocation.distanceBetween(mylatitude, mylongitude, latitude, longitude, result);
return result[0];
}
public void show ( ArrayList names) {
ArrayList<String> arrList = new ArrayList<>();
arrList = names;
int c = arrList.size();
Float t[] = new Float[10];
Double company[] = new Double[3];
if (c > 0) {
int n = 0;
int i = 0;
while (c > 0) {
Double latitude = Double.valueOf(arrList.get(n));
Double longitude = Double.valueOf(arrList.get(n + 1));
Double price = Double.valueOf(arrList.get(n + 2));
t[i] = distanceBetween(latitude, longitude);
if (n == 0) {
company[0] = latitude;
company[1] = longitude;
company[2] = price;
}
if ((i > 0) && (t[i] < t[i - 1])) {
t[i] = t[i - 1];
company[0] = latitude;
company[1] = longitude;
company[2] = price;
}
i = i + 1;
n = n + 3;
c = c - 3;
}
mark(company[0], company[1]);
} else {
Toast T = Toast.makeText(this, "product is not available ", Toast.LENGTH_SHORT);
T.show();
}
Toast.makeText(this, "price of product = " + company[2], Toast.LENGTH_LONG).show();
}
}
public class Parser2 extends AsyncTask<Void,Void,Integer> {
Context c;
String data;
ArrayList<String> names=new ArrayList<>();
public Parser2(Context c, String data) {
this.c = c;
this.data = data;
}
#Override
protected void onPreExecute() {
super.onPreExecute();
}
#Override
protected Integer doInBackground(Void... params) {
return this.parse();
}
#Override
protected void onPostExecute(Integer integer) {
super.onPostExecute(integer);
if(integer==1)
{
MapsActivity m =new MapsActivity();
m.show(names);
}else {
Toast.makeText(c,"Unable to Parse2",Toast.LENGTH_SHORT).show();
}
}
private int parse()
{
try
{
JSONArray ja=new JSONArray(data);
JSONObject jo=null;
names.clear();
int i;
for( i=0;i<ja.length();i++)
{
jo=ja.getJSONObject(i);
String latitude=jo.getString("latitude");
String longitude=jo.getString("longitude");
String price=jo.getString("price");
names.add(latitude);
names.add(longitude);
names.add(price);}
return 1;
} catch (JSONException e) {
e.printStackTrace();
}
return 0;
}
}

It seems the reason of the problem is because getMyLocation() is null and the algorithm is expecting it not to be null. Please make sure that this object contains value. You can use this code to check the last location of the user:
LocationManager service = (LocationManager)
getSystemService(LOCATION_SERVICE);
Criteria criteria = new Criteria();
String provider = service.getBestProvider(criteria, false);
Location location = service.getLastKnownLocation(provider);
LatLng userLocation = new LatLng(location.getLatitude(),location.getLongitude());
Hope this information find you helpful and good luck on your project!

Skipped 1492 frames! The application may be doing too much work on its main thread.How to show loader while skipping frames in app? [duplicate]

This question already has answers here:
The application may be doing too much work on its main thread
(21 answers)
Closed 1 year ago.
As I am new to android I couldn't fix this skipped 1000+ frames issue.Help me to sort out this and help me to add loading progress bar while this skipping frames action takes place before opening map. This is my map code.
RouteMap.java
public class RouteMap extends android.support.v4.app.FragmentActivity
implements OnClickListener, OnInfoWindowClickListener,
DirecitonReceivedListener, OnMapReadyCallback {
public List<String> destinations;
ImageView img_home, img_menu;
private GoogleMap mMap;
ProgressDialog prgDialog;
model modelData;
private Button btnDirection;
double latitude, longitude;
LinearLayout linear_back;
LatLng startPosition, start;
String startPositionTitle;
Vibrator vibrator;
String startPositionSnippet;
Double desc1_long, desc1_lat;
LatLng destinationPosition1;
String destinationPositionTitle;
String destinationPositionSnippet;
MarkerOptions mDestination1, mStart;
ToggleButton tbMode;
GPSTracker gps;
Geocoder gCoder;
ArrayList<Address> addresses = null;
ArrayList<Address> adres2 = null;
SupportMapFragment mapFragment;
public final static double AVERAGE_RADIUS_OF_EARTH = 6371;
TextView back_txt;
openMap openMap;
String mapStatus = "start";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_route_map);
back_txt = (TextView) findViewById(R.id.txt_back);
try {
back_txt = (TextView) findViewById(R.id.txt_back);
modelData = model.getInstance();
vibrator = (Vibrator) getApplicationContext().getSystemService(Context.VIBRATOR_SERVICE);
gps = new GPSTracker(RouteMap.this);
latitude = gps.getLatitude();
longitude = gps.getLongitude();
gCoder = new Geocoder(RouteMap.this);
addresses = (ArrayList<Address>) gCoder.getFromLocation(latitude, longitude, 1);
tbMode = (ToggleButton) findViewById(R.id.tbMode);
mapFragment = ((SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map));
mapFragment.getMapAsync(this);
btnDirection = (Button) findViewById(R.id.btnDirection);
btnDirection.setOnClickListener(this);
tbMode.setChecked(true);
} catch (IOException e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(), "Please Check your Data connection or Turn on your Location", Toast.LENGTH_LONG).show();
}
}
public int calculateDistance(double userLat, double userLng, double venueLat, double venueLng) {
final int R = 6371;
try {
Double latDistance = deg2rad(venueLat - userLat);
Double lonDistance = deg2rad(venueLng - userLng);
Double a = Math.sin(latDistance / 2) * Math.sin(latDistance / 2)
+ Math.cos(deg2rad(userLat)) * Math.cos(deg2rad(venueLat))
* Math.sin(lonDistance / 2) * Math.sin(lonDistance / 2);
Double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
double distance = R * c * 1000; // convert to meters
double height = 0 - 0;
distance = Math.pow(distance, 2) + Math.pow(height, 2);
return (int) Math.sqrt(distance);
} catch (Exception ex) {
Toast.makeText(getApplicationContext(), "Please Check your Destination's GeoCode ", Toast.LENGTH_LONG).show();
}
return 0;
}
private double deg2rad(double deg) {return (deg * Math.PI / 180.0);}
#Override
public void onMapReady(GoogleMap googleMap) {
mMap=googleMap;
//setUpMap();
try {
mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
mMap.setMyLocationEnabled(true);
mMap.setIndoorEnabled(true);
mMap.getUiSettings().setZoomControlsEnabled(true);
mMap.getUiSettings().setMyLocationButtonEnabled(true);
mMap.getUiSettings().setCompassEnabled(true);
mMap.getUiSettings().setAllGesturesEnabled(true);
String[] arr = new String[modelData.outletList.size()];
for(int i=0;i<modelData.outletList.size();i++)
{
String str1 = modelData.outletList.get(i)[2];
String str2 = modelData.outletList.get(i)[3];
String newString = str1+","+str2;
arr[i] = newString;
}
String[] latTempArr = arr;
String strKey = "";
double curLatitude = latitude;
double curLongtitude = longitude;
double desLat;
double desLng;
Map<String, Integer> final_arr = new HashMap<String, Integer>();
Map<String, Integer> final_arr2 = new HashMap<String, Integer>();
List<Integer> intTempArr = new ArrayList<Integer>();
List<Integer> intTempArr2 = new ArrayList<Integer>();
for(int j=0;j<arr.length;j++)
{
intTempArr = new ArrayList<Integer>();
for (int k=0;k<latTempArr.length;k++)
{
String[] arr_temp = latTempArr[k].split(",");
//System.out.println(arr_temp[0]);
desLat = Double.parseDouble(arr_temp[0]);
desLng = Double.parseDouble(arr_temp[1]);
int temp = calculateDistance(curLatitude,curLongtitude,desLat,desLng);
intTempArr.add(temp);
final_arr.put(latTempArr[k],temp);
}
Collections.sort(intTempArr);
Integer[] array = new Integer[intTempArr.size()];
intTempArr.toArray(array);
for (Map.Entry<String, Integer> entry : final_arr.entrySet()) {
try{
if (entry.getValue().equals(array[0])) { //get next best path
List<String> list = new ArrayList<String>(Arrays.asList(latTempArr)); // remove the best path to find next one
list.remove(entry.getKey());
latTempArr = list.toArray(new String[0]);
String[] arr_temp2 = entry.getKey().split(",");
//System.out.println(arr_temp[0]);
curLatitude = Double.parseDouble(arr_temp2[0]);
curLongtitude = Double.parseDouble(arr_temp2[1]);
strKey = entry.getKey();
intTempArr2.add(entry.getValue());
final_arr2.put(strKey,entry.getValue());
}
}
catch(Exception e)
{
}
}
//System.out.println(intTempArr);
}
//int i = 0;
destinations = new ArrayList<String>();
for(int i =0;i<intTempArr2.size();i++) {
for(String Key : final_arr2.keySet()) {
//System.out.println();
if(final_arr2.get(Key) == intTempArr2.get(i)) {
destinations.add(Key);
break;
}
}
}
System.out.println(destinations);
for(int i = 0;i < destinations.size();i++) {
//Toast.makeText(getApplicationContext(), " ListItem : " + i, Toast.LENGTH_LONG).show();
String desti1 = destinations.get(i);
String[] des = desti1.split(",");
desc1_lat = Double.parseDouble(des[0]);
desc1_long = Double.parseDouble(des[1]);
startPosition = new LatLng(latitude, longitude);
startPositionTitle = addresses.get(0).getLocality();
startPositionSnippet = addresses.get(0).getAddressLine(1)+"," +" "+ addresses.get(0).getAddressLine(2);
try {
adres2 = (ArrayList<Address>) gCoder.getFromLocation(desc1_lat, desc1_long, 1);
} catch (IOException e) {
e.printStackTrace();
}
destinationPosition1 = new LatLng(desc1_lat, desc1_long);
destinationPositionTitle = adres2.get(0).getLocality();
destinationPositionSnippet =adres2.get(0).getAddressLine(1)+"," +" "+adres2.get(0).getAddressLine(2);
// mMap.setOnInfoWindowClickListener(this);
mMap.setInfoWindowAdapter(new GoogleMap.InfoWindowAdapter() {
#Override
public View getInfoWindow(Marker marker) {
return null;
}
#Override
public View getInfoContents(Marker marker) {
View v = getLayoutInflater().inflate(R.layout.marker, null);
TextView info= (TextView) v.findViewById(R.id.info);
info.setText(marker.getSnippet().toString());
return v;
}
});
mDestination1 = new MarkerOptions()
.position(destinationPosition1)
.title(destinationPositionTitle)
.snippet(destinationPositionSnippet)
.icon(BitmapDescriptorFactory.fromResource(R.drawable.pin1));
mStart = new MarkerOptions()
.position(startPosition)
.title(startPositionTitle)
.snippet(startPositionSnippet)
.icon(BitmapDescriptorFactory.fromResource(R.drawable.pin2));
mMap.addMarker(mDestination1);
mMap.addMarker(mStart);
latitude = desc1_lat;
longitude = desc1_long;
LatLng locations = new LatLng(latitude,longitude);
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(locations, 5.5f));
}
}catch (Exception ex)
{
/*Toast.makeText(getApplicationContext(), "Please Check your Data connection or Turn on your Location", Toast.LENGTH_LONG).show();*/
}
}
public void clearMap() {
mMap.clear();
}
#Override
public void onClick(View v) {
try
{
Locale mLocale = new Locale("en");
Log.d("Display language = ", "" + mLocale.getDisplayLanguage());
gCoder = new Geocoder(RouteMap.this,mLocale);
gps = new GPSTracker(RouteMap.this);
latitude = gps.getLatitude();
longitude = gps.getLongitude();
for(int i = 0;i<destinations.size();i++) {
String desti1 = destinations.get(i);
String[] des = desti1.split(",");
desc1_lat = Double.parseDouble(des[0]);
desc1_long = Double.parseDouble(des[1]);
startPosition = new LatLng(latitude, longitude);
startPositionTitle = addresses.get(0).getLocality();
startPositionSnippet = addresses.get(0).getAddressLine(1)+","+" "+addresses.get(0).getAddressLine(2);
destinationPosition1 = new LatLng(desc1_lat, desc1_long);
destinationPositionTitle = adres2.get(0).getLocality();
destinationPositionSnippet =adres2.get(0).getAddressLine(1)+","+""+ adres2.get(0).getAddressLine(2);
mMap.setOnInfoWindowClickListener(this);
mStart = new MarkerOptions()
.position(startPosition)
.title(startPositionTitle)
.snippet(startPositionSnippet)
.icon(BitmapDescriptorFactory.fromResource(R.drawable.pin1));
mDestination1 = new MarkerOptions()
.position(destinationPosition1)
.title(destinationPositionTitle)
.snippet(destinationPositionSnippet)
.icon(BitmapDescriptorFactory.fromResource(R.drawable.pin2));
if (v == btnDirection) {
// clearMap();
mMap.addMarker(mDestination1);
mMap.addMarker(mStart);
if (tbMode.isChecked()) {
new GetRotueListTask(RouteMap.this, startPosition,
destinationPosition1, GMapV2Direction.MODE_DRIVING, this)
.execute();
} else {
new GetRotueListTask(RouteMap.this, startPosition,
destinationPosition1, GMapV2Direction.MODE_WALKING, this)
.execute();
}
}
latitude = desc1_lat;
longitude = desc1_long;
}
}catch (Exception ex)
{
Toast.makeText(getApplicationContext(), "Please Check your Data connection or Turn on your Location", Toast.LENGTH_LONG).show();
}
}
#Override
public void OnDirectionListReceived(List<LatLng> mPointList) {
try
{
if (mPointList != null) {
PolylineOptions rectLine = new PolylineOptions().width(10).color(
Color.RED);
for (int i = 0; i < mPointList.size(); i++) {
rectLine.add(mPointList.get(i));
}
mMap.addPolyline(rectLine);
gps = new GPSTracker(RouteMap.this);
latitude = gps.getLatitude();
longitude = gps.getLongitude();
start = new LatLng(latitude, longitude);
CameraPosition mCPFrom = new CameraPosition.Builder()
.target(start).zoom(15.5f).bearing(0).tilt(25)
.build();
final CameraPosition mCPTo = new CameraPosition.Builder()
.target(destinationPosition1).zoom(15.5f).bearing(0)
.tilt(50).build();
changeCamera(CameraUpdateFactory.newCameraPosition(mCPFrom),
new CancelableCallback() {
#Override
public void onFinish() {
changeCamera(CameraUpdateFactory
.newCameraPosition(mCPTo),
new CancelableCallback() {
#Override
public void onFinish() {
LatLngBounds bounds = new LatLngBounds.Builder()
.include(start)
.include(
destinationPosition1)
.build();
changeCamera(
CameraUpdateFactory
.newLatLngBounds(
bounds, 50),
null, false);
}
#Override
public void onCancel() {
}
}, false);
}
#Override
public void onCancel() {
}
}, true);
}
}catch (Exception ex)
{
Toast.makeText(getApplicationContext(), "Please Check your Data Connection", Toast.LENGTH_LONG).show();
}
}
private void changeCamera(CameraUpdate update, CancelableCallback callback,
boolean instant) {
if (instant) {
mMap.animateCamera(update, 1, callback);
} else {
mMap.animateCamera(update, 4000, callback);
}
}
#Override
protected void onResume() {
super.onResume();
}
#Override
public void onInfoWindowClick(Marker marker) {
}
private class openMap extends AsyncTask<String, Void, String>
{
ProgressDialog mProgressDialog;
Context ctx;
public openMap(Context ctx)
{
this.ctx=ctx;
mProgressDialog = new ProgressDialog(RouteMap.this);
}
#Override
protected void onPreExecute() {
super.onPreExecute();
mProgressDialog.setMessage("Loading Map..Please wait....");
mProgressDialog.setIndeterminate(true);
mProgressDialog.setCancelable(false);
mProgressDialog.show();
// Toast.makeText(getApplicationContext(), "Syncing DB...", Toast.LENGTH_LONG).show();
}
#Override
protected String doInBackground(String... urls)
{
return "Success";
}
#Override
protected void onPostExecute(String result)
{
mProgressDialog.dismiss();
try
{
if(result.equalsIgnoreCase("Success")) {
}
else
{
Toast.makeText(getApplicationContext(), "Please Check your Data connection or Turn on your Location", Toast.LENGTH_LONG).show();
}
}catch (Exception e){}
}
}
}
From this code above what changes should I make to fix the Skipped
1000+ frames issue and also help me add loader before opening the
map...

Geocoder.getFromLocation() is an expensive call that does a network call to Google's servers, so don't make it on the UI thread.
Have a look at Processes and Threads in the android developer docs for various ways of making the request in the background.

The code that you write in OnMapReady function is to much, please remove that code from there I can see there are more then 4 "for" loops in onMapReady, move that part to to some where else like OnCreate() create all maps and lists that you want.
Just ues OnMapReady function for placing markers

My Android UI doesn't run?

I implemented AsyncTask to execute results. Here is the error I get...
FATAL EXCEPTION: AsyncTask #1
Process: ai69.psoui, PID: 3287
java.lang.RuntimeException: An error occurred while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:309)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:354)
at java.util.concurrent.FutureTask.setException(FutureTask.java:223)
at java.util.concurrent.FutureTask.run(FutureTask.java:242)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
at java.lang.Thread.run(Thread.java:818)
Caused by: java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
at android.os.Handler.<init>(Handler.java:200)
at android.os.Handler.<init>(Handler.java:114)
at android.app.Activity.<init>(Activity.java:754)
at android.support.v4.app.SupportActivity.<init>(SupportActivity.java:31)
at android.support.v4.app.BaseFragmentActivityGingerbread.<init>(BaseFragmentActivityGingerbread.java:37)
at android.support.v4.app.BaseFragmentActivityHoneycomb.<init>(BaseFragmentActivityHoneycomb.java:29)
at android.support.v4.app.BaseFragmentActivityJB.<init>(BaseFragmentActivityJB.java:30)
at android.support.v4.app.FragmentActivity.<init>(FragmentActivity.java:79)
at android.support.v7.app.AppCompatActivity.<init>(AppCompatActivity.java:61)
at ai69.psoui.MainActivity.<init>(MainActivity.java:0)
at android_tests.CustomUseCase.<init>(CustomUseCase.java:19)
at android_tests.TestFactory.getTest(TestFactory.java:15)
at ai69.psoui.ParticleActivity.runTest(ParticleActivity.java:91)
at ai69.psoui.ParticleActivity$runTests.doInBackground(ParticleActivity.java:53)
at ai69.psoui.ParticleActivity$runTests.doInBackground(ParticleActivity.java:50)
at android.os.AsyncTask$2.call(AsyncTask.java:295)
I have looked at different SOF posts about "Looper.prepare()" but the thing is, prior to a few changes in changing static variables to getter/setter methods, my UI was working fine.
Here is my code...
public class ParticleActivity extends AppCompatActivity {
public final static String EXTRA_MESSAGE = "PSOUI.MESSAGE";
private ProgressDialog pd;
private double[] results = {-1.0, -1.0, -1.0};
EditText particles;
EditText iterations;
EditText userSol;
EditText userBatt;
private double battery;
private double solution;
//int numberOfDimensions = MainActivity.dimensions.size();
//public ArrayList<Double> costData = MainActivity.costDATA; //costs that
the user enters for each resource
//public ArrayList<Double> costWlan = MainActivity.costWLAN;
//public ArrayList<Double> costUtilities = MainActivity.costUTILITY;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_particle);
particles = (EditText) findViewById(R.id.particles);
iterations = (EditText) findViewById(R.id.iterations);
userSol = (EditText) findViewById(R.id.solution);
userBatt = (EditText) findViewById(R.id.battery);
pd = null;
runPSOButton();
}
#Override
public void onPause(){
super.onPause();
if(pd != null)
pd.dismiss();
}
public class runTests extends AsyncTask<Void, Void, Void> {
#Override
protected Void doInBackground(Void... params) { //sort this out
results = runTest("CustomUseCase"); //i only want to run this one!!!
return null;
}
#Override
protected void onPostExecute(Void v) {
if (results != null && results.length > 0 && results[0] != -1) {
loadIntent(results);
} //otherwise it will evaluate the next logic statement results[0] != -1 with no chance of NulLPointerException
}
#Override
protected void onPreExecute() {
pd = ProgressDialog.show(ParticleActivity.this, "Busy", "Algorithm is currently executing");
pd.setCancelable(true);
pd.show();
}
}
public void runPSOButton() {
final Button runPSO = (Button) findViewById(R.id.runpso);
runPSO.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(final View v) {
new runTests().execute();
}
});
}
public double[] runTest(String test) {
int noPart = Integer.parseInt(particles.getText().toString());
int noIter = Integer.parseInt(iterations.getText().toString());
return new TestFactory(noPart, noIter).getTest(test).test();
}
public void loadIntent(double[] result) {
double[] results = result;
Intent intent = new Intent(this, SolutionActivity.class);
intent.putExtra(EXTRA_MESSAGE, results);
startActivity(intent);
}
public double setBatteryCost(){
battery = Double.parseDouble(userBatt.getText().toString());
return battery;
}
public double getBatteryCost(){return setBatteryCost();}
public double setUserSolution(){
solution = Double.parseDouble(userSol.getText().toString());
return solution;
}
public double getUserSolution(){return setUserSolution();}
}
Can someone explain whats happening? New to Android Studio and have been developing for only 3 months in Java, so for any solutions can I kindly request an explanation for it too? Much appreciated thank you
UPDATE:
Here is my mainActivity...
public class MainActivity extends AppCompatActivity {
//declare variables
EditText name;
EditText data;
EditText wlan;
EditText utility;
Button addservice;
ListView lv;
ListView lv2;
ListView lv3;
ListView lv4;
public ArrayList<String> servicenames;
public ArrayList<String> dimensions;
public ArrayList<Double> costDATA;
public ArrayList<Double> costWLAN;
public ArrayList<Double> costUTILITY;
ArrayAdapter<String> namesAdapter;
ArrayAdapter<Double> dataAdapter;
ArrayAdapter<Double> wlanAdapter;
ArrayAdapter<Double> utilityAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//map the components to the variables
name = (EditText) findViewById(R.id.servicename);
data = (EditText) findViewById(R.id.data);
wlan = (EditText) findViewById(R.id.wlan);
utility = (EditText) findViewById(R.id.utility);
addservice = (Button) findViewById(R.id.addservice);
lv = (ListView) findViewById(R.id.lv);
lv2 = (ListView) findViewById(R.id.lv2);
lv3 = (ListView) findViewById(R.id.lv3);
lv4 = (ListView) findViewById(R.id.lv4);
//create arraylists for each component
servicenames = new ArrayList<String>();
dimensions = new ArrayList<String>();
costDATA = new ArrayList<Double>();
costWLAN = new ArrayList<Double>();
costUTILITY = new ArrayList<Double>();
//create adapters to pass on the arraylist
namesAdapter = new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_1, servicenames);
dataAdapter = new ArrayAdapter<Double>(MainActivity.this, android.R.layout.simple_list_item_1, costDATA);
wlanAdapter = new ArrayAdapter<Double>(MainActivity.this, android.R.layout.simple_list_item_1, costWLAN);
utilityAdapter = new ArrayAdapter<Double>(MainActivity.this, android.R.layout.simple_list_item_1, costUTILITY);
//display each arraylist in the listviews
lv.setAdapter(namesAdapter);
lv2.setAdapter(wlanAdapter);
lv3.setAdapter(dataAdapter);
lv4.setAdapter(utilityAdapter);
namesAdapter.notifyDataSetChanged();
dataAdapter.notifyDataSetChanged();
wlanAdapter.notifyDataSetChanged();
utilityAdapter.notifyDataSetChanged();
dimensions.add("DATA");
dimensions.add("WLAN");
onClickBtn();
}
public void onClickBtn() { //when user clicks button, the user input is added to the listview, and cleared for the next service
addservice.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String namesOfService = name.getText().toString(); //user input for service names
String costOfData = data.getText().toString(); //user input for data costs
String costOfWLAN = wlan.getText().toString(); //user input for wlan costs
String costOfUtility = utility.getText().toString(); //user input for utility costs
Double doubleWLAN = Double.parseDouble(costOfWLAN); //convert user input into double
Double doubleData = Double.parseDouble(costOfData);
Double doubleUtility = Double.parseDouble(costOfUtility);
costDATA.add(doubleData); //add the double costs to each resource arraylist
costWLAN.add(doubleWLAN);
costUTILITY.add(doubleUtility);
servicenames.add(namesOfService);
dimensions.add(namesOfService);
namesAdapter.notifyDataSetChanged();
dataAdapter.notifyDataSetChanged();
wlanAdapter.notifyDataSetChanged();
utilityAdapter.notifyDataSetChanged();
name.setText(""); //empty the edit text fields when button is clicked
wlan.setText("");
data.setText("");
utility.setText("");
}
});
}
public void nextButton(View view) //next button, onto the next activity
{
Intent intent = new Intent(MainActivity.this, ParticleActivity.class);
startActivity(intent);
}
public int getDimensions(){ return dimensions.size();}
public ArrayList<String> getElements(){ return servicenames;}
public ArrayList<Double> getCostDATA(){;return costDATA;}
public ArrayList<Double> getCostWLAN(){return costUTILITY;}
public ArrayList<Double> getCostUTILITY(){return costUTILITY;}
}
As you can see, the arraylists that store the user input is accessible using getters and setters rather than setting the arraylists static (which I did before). I access these arraylists in another class called CustomUseCase and CustomService. Here is the code for customUseCase:
public class CustomUseCase extends Test {
MainActivity mainActivity = new MainActivity();
ParticleActivity particleActivity = new ParticleActivity();
private int numberOfDimensions = mainActivity.getDimensions();
private ArrayList<Double> costData = mainActivity.getCostDATA(); //costs that the user enters for each resource
private ArrayList<Double> costWlan = mainActivity.getCostWLAN();
private ArrayList<Double> costUtilities = mainActivity.getCostUTILITY();
private double batteryCost = particleActivity.getBatteryCost();
private int maxIter;
private int noParticles;
public CustomUseCase(int noParticles, int maxIterations) {
this.noParticles = noParticles;
this.maxIter = maxIterations;
}
#Override
public double[] test() {
long max = 10000; //maximum number of iterations, override //2 bits for the WLAN/DATA and the rest for the amount of services the user inputs
double[] results = new double[numberOfDimensions]; //new array of results with numOfBits as number of elements
for (int i = 1; i <= max; i++) {
BinaryPso bpso = new BinaryPso(noParticles,
numberOfDimensions);
ParticleActivity getUserInput = new ParticleActivity();
CustomService customService =
new CustomService(batteryCost, costData, costWlan, costUtilities);
long start = System.currentTimeMillis(); //start time
bpso.setSolution(getUserInput.getUserSolution()); //changed this to user selection
bpso.optimize(maxIter, customService, true);
this.found += (bpso.getFound() ? 1 : 0);
this.iterations += bpso.getSolIterations(); //use the method in bpso to get number of iterations taken
long end = System.currentTimeMillis() - start; //end time minus start time
this.sumTimes += end; //override the time spent variable
System.out.println("P-value: " + Particle.getValue(Particle.bestGlobal()));
System.out.println("P-bitCombo: " + Arrays.toString(Particle.bestGlobal()));
System.out.println("P-goodness: " + customService.getGoodness(Particle.bestGlobal()));
}
System.out.println("Time: " + sumTimes / max);
System.out.println("Iterations: " + iterations / max);
System.out.println("Success Rate: " + found);
boolean[] bestCombo = Particle.bestGlobal();
for (Boolean b : bestCombo) {
System.out.print(b + " ");
}
System.out.println();
results[0] = sumTimes / max;
results[1] = iterations / max;
results[2] = found;
return results;
}
public static List<Boolean> getBestComboArray() { //method to get best global array
boolean[] bestCombo = Particle.bestGlobal(); //calculate best global
List<Boolean> bestCombi = new ArrayList<>(bestCombo.length);
for (int x = 0; x < bestCombo.length; x++) {
bestCombi.add(bestCombo[x]);
}
return bestCombi;
}
}
And here is my CustomService class:
public class CustomService implements Goodness {
MainActivity mainActivity = new MainActivity();
private int numOfDimensions = mainActivity.getDimensions();
private ArrayList<String> serviceNames = mainActivity.getElements();
private ArrayList<Double> costData = mainActivity.getCostDATA();
private ArrayList<Double> costWlan = mainActivity.getCostWLAN();
private ArrayList<Double> costUtilities = mainActivity.getCostUTILITY();
private double batteryCost;
public void setBatteryCost(double batteryCost) {
this.batteryCost = batteryCost;
}
public CustomService(double batteryCost, ArrayList<Double> costData, ArrayList<Double> costWlan,
ArrayList<Double> costUtilities) {
if (costUtilities == null || costUtilities.size() < 1 || costData.size() < 1 || costWlan.size() < 1) {
throw new RuntimeException("Please add atleast 1 cost to Data, WLAN and Utility");
}
this.batteryCost = batteryCost; //make sure you add battery field to UI, user enters battery level
this.costData = costData;
this.costWlan = costWlan;
this.costUtilities = costUtilities;
}
public double getGoodness(boolean[] bits) {
double utility = 0.0;
double rcost = 0.0;
ArrayList<Double> resourceCost = new ArrayList<Double>();
Collections.sort(costUtilities); //sort the costUtilities arraylist
double maxValue = Collections.max(costUtilities); //get the maximum value from the costUtilities arraylist
if(bits[0] && bits[1]){
return -500;
}
if(!bits[0] || bits[1]){
return -1000;
}
for(int x = 1; x < numOfDimensions; x++){
if(bits[x] == costUtilities.contains(maxValue)){
return -1900;
}
}
if (bits[0]) {
resourceCost = costData;
} else if (bits[1]) {
resourceCost = costWlan;
}
for (int i = 2; i <= serviceNames.size(); i++) { //if i = 2, 2<=4
if (bits[i]) {
utility += costUtilities.get(i-2);
rcost += resourceCost.get(i-2);
}
}
if (rcost < batteryCost) {
return utility;
}
return utility * 0.50;
}
}

you can not update UI items on nonUIThread.
search usage of runOnUiThread on google.
call your method in runOnUiThread().
#Override
protected Void doInBackground(Void... params) { //sort this out
runOnUiThread (new Runnable() {
public void run() {
results = runTest("CustomUseCase");
}
}
return null;
}

This explains all: "Can't create handler inside thread that has not called Looper.prepare()" and it seems your TestFactory() method creates a Handler without a Looper.
Inside a secondary Thread a Handler should be like this
....
Looper.prepare();
mHandler = new Handler() {
#Override
public void handleMessage(Message msg) {
// do work with received messages
}
};
Looper.loop();
....
More info : What is the purpose of Looper and how to use it?

Rotate Marker and Move Animation on Map like Uber Android

I am working on a project similar to UBER, Lyft or OLA ie. Map on the home with available moving Cars.
I'm looking for some kind of Library which can make Cars move and take turn smoothly just like UBER. For now I was able to move car smoothly from one lat-long to another with the below code. But tricky part is Taking turn and make sure the car face to front when moving to direction.
Smooth Moving Car Code:
final LatLng SomePos = new LatLng(12.7796354, 77.4159606);
try {
if (googleMap == null) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
googleMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();
}
}
googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
googleMap.setMyLocationEnabled(true);
googleMap.setTrafficEnabled(false);
googleMap.setIndoorEnabled(false);
googleMap.setBuildingsEnabled(true);
googleMap.getUiSettings().setZoomControlsEnabled(true);
googleMap.moveCamera(CameraUpdateFactory.newLatLng(SomePos));
googleMap.moveCamera(CameraUpdateFactory.newCameraPosition(new CameraPosition.Builder()
.target(googleMap.getCameraPosition().target)
.zoom(17)
.bearing(30)
.tilt(45)
.build()));
myMarker = googleMap.addMarker(new MarkerOptions()
.position(SomePos)
.icon(BitmapDescriptorFactory.fromResource(R.mipmap.ic_launcher))
.title("Hello world"));
googleMap.setOnMarkerClickListener(new GoogleMap.OnMarkerClickListener() {
#Override
public boolean onMarkerClick(Marker arg0) {
final LatLng startPosition = myMarker.getPosition();
final LatLng finalPosition = new LatLng(12.7801569, 77.4148528);
final Handler handler = new Handler();
final long start = SystemClock.uptimeMillis();
final Interpolator interpolator = new AccelerateDecelerateInterpolator();
final float durationInMs = 3000;
final boolean hideMarker = false;
handler.post(new Runnable() {
long elapsed;
float t;
float v;
#Override
public void run() {
// Calculate progress using interpolator
elapsed = SystemClock.uptimeMillis() - start;
t = elapsed / durationInMs;
LatLng currentPosition = new LatLng(
startPosition.latitude * (1 - t) + finalPosition.latitude * t,
startPosition.longitude * (1 - t) + finalPosition.longitude * t);
myMarker.setPosition(currentPosition);
// Repeat till progress is complete.
if (t < 1) {
// Post again 16ms later.
handler.postDelayed(this, 16);
} else {
if (hideMarker) {
myMarker.setVisible(false);
} else {
myMarker.setVisible(true);
}
}
}
});
return true;
}
});
} catch (Exception e) {
e.printStackTrace();
}

I recently came across the same use-case. Here is my solution on it.
First, I would like to thank #VipiN for sharing "The Smooth Moving Car Code". It works smoothly.
The second part is to place car-marker in the right direction and rotate it according to turns. To achieve this I calculated the bearing or heading angle between two successive points(i.e. location updates you receive from device/server). This link will help you understand the maths behind it.
The following code will give you bearing between two locations:
private double bearingBetweenLocations(LatLng latLng1,LatLng latLng2) {
double PI = 3.14159;
double lat1 = latLng1.latitude * PI / 180;
double long1 = latLng1.longitude * PI / 180;
double lat2 = latLng2.latitude * PI / 180;
double long2 = latLng2.longitude * PI / 180;
double dLon = (long2 - long1);
double y = Math.sin(dLon) * Math.cos(lat2);
double x = Math.cos(lat1) * Math.sin(lat2) - Math.sin(lat1)
* Math.cos(lat2) * Math.cos(dLon);
double brng = Math.atan2(y, x);
brng = Math.toDegrees(brng);
brng = (brng + 360) % 360;
return brng;
}
Finally, we need to rotate the car-marker by the angle that we get from above method.
private void rotateMarker(final Marker marker, final float toRotation) {
if(!isMarkerRotating) {
final Handler handler = new Handler();
final long start = SystemClock.uptimeMillis();
final float startRotation = marker.getRotation();
final long duration = 1000;
final Interpolator interpolator = new LinearInterpolator();
handler.post(new Runnable() {
#Override
public void run() {
isMarkerRotating = true;
long elapsed = SystemClock.uptimeMillis() - start;
float t = interpolator.getInterpolation((float) elapsed / duration);
float rot = t * toRotation + (1 - t) * startRotation;
marker.setRotation(-rot > 180 ? rot / 2 : rot);
if (t < 1.0) {
// Post again 16ms later.
handler.postDelayed(this, 16);
} else {
isMarkerRotating = false;
}
}
});
}
}
Cheers!

Here is my code to move marker like uber. i have shown two ways to move marker .
Important Note: To move car on proper road [like ola,uber] you need to use road api provided by google
1.By static latitude and longitude
2.By Real time Latitude and longitude
package com.gangsofcoder.googlemapdemo;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ValueAnimator;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.Handler;
import android.os.PersistableBundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.animation.LinearInterpolator;
import android.widget.Button;
import android.widget.Toast;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.CameraPosition;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
import com.loopj.android.http.AsyncHttpResponseHandler;
import com.loopj.android.http.RequestParams;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import cz.msebera.android.httpclient.Header;
public class MoveCar extends AppCompatActivity {
private GoogleMap googleMap;
SupportMapFragment mapFragment;
Marker marker;
private boolean isMarkerRotating = false;
ArrayList<LatLng> listOfPoints = new ArrayList<>();
int currentPt = 0;
LatLng finalPosition;
Marker mMarker;
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setUpMapIfNeeded();
//new location details
listOfPoints.add(new LatLng(30.701623, 76.684220));
listOfPoints.add(new LatLng(30.702486, 76.685487));
listOfPoints.add(new LatLng(30.703135, 76.684891));
listOfPoints.add(new LatLng(30.703256, 76.685000));
listOfPoints.add(new LatLng(30.703883, 76.685941));
listOfPoints.add(new LatLng(30.703413, 76.685190));
}
private void setUpMapIfNeeded() {
if (mapFragment == null) {
mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
if (mapFragment != null) {
mapFragment.getMapAsync(new OnMapReadyCallback() {
#Override
public void onMapReady(GoogleMap googleMap) {
loadMap(googleMap);
}
});
}
}
}
private void loadMap(GoogleMap map) {
googleMap = map;
mMarker = googleMap.addMarker(new MarkerOptions().position(new LatLng(30.701623, 76.684220)).icon(BitmapDescriptorFactory.fromResource(R.drawable.icon_car)));
final Handler handler = new Handler();
//Code to move car along static latitude and longitude
/* handler.postDelayed(new Runnable() {
#Override
public void run() {
if (currentPt < listOfPoints.size()) {
//post again
Log.d("tess", "inside run ");
Location targetLocation = new Location(LocationManager.GPS_PROVIDER);
targetLocation.setLatitude(listOfPoints.get(currentPt).latitude);
targetLocation.setLongitude(listOfPoints.get(currentPt).longitude);
animateMarkerNew(targetLocation, mMarker);
handler.postDelayed(this, 3000);
currentPt++;
} else {
Log.d("tess", "call back removed");
//removed callbacks
handler.removeCallbacks(this);
}
}
}, 3000);*/
//Here move marker along real time updates
final RequestParams params = new RequestParams();
params.put("source_lattitude", "lat");
params.put("source_longitude", "long");
params.put("date", "date");
//new handler
handler.postDelayed(new Runnable() {
#Override
public void run() {
LoopjHttpClient.post(getString(R.string.default_upload_website), params, new AsyncHttpResponseHandler() {
#Override
public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {
try {
JSONObject jsonObject = new JSONObject(new String(responseBody));
String status = jsonObject.getString("status");
String text = jsonObject.getString("text");
//reading json array
JSONArray jsonArray = jsonObject.getJSONArray("result");
String source = jsonArray.getJSONObject(0).getString("source");
String[] latLong = source.split(",");
Location location = new Location(LocationManager.GPS_PROVIDER);
location.setLatitude(Double.parseDouble(latLong[0]));
location.setLongitude(Double.parseDouble(latLong[1]));
//calling method to animate marker
animateMarkerNew(location, mMarker);
} catch (JSONException e) {
e.printStackTrace();
}
}
#Override
public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error) {
Log.d("onFailure", "onFailure");
}
});
handler.postDelayed(this, 3000);
}
}, 3000);
}
private void animateMarkerNew(final Location destination, final Marker marker) {
if (marker != null) {
final LatLng startPosition = marker.getPosition();
final LatLng endPosition = new LatLng(destination.getLatitude(), destination.getLongitude());
final float startRotation = marker.getRotation();
final LatLngInterpolatorNew latLngInterpolator = new LatLngInterpolatorNew.LinearFixed();
ValueAnimator valueAnimator = ValueAnimator.ofFloat(0, 1);
valueAnimator.setDuration(3000); // duration 3 second
valueAnimator.setInterpolator(new LinearInterpolator());
valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
#Override
public void onAnimationUpdate(ValueAnimator animation) {
try {
float v = animation.getAnimatedFraction();
LatLng newPosition = latLngInterpolator.interpolate(v, startPosition, endPosition);
marker.setPosition(newPosition);
googleMap.moveCamera(CameraUpdateFactory.newCameraPosition(new CameraPosition.Builder()
.target(newPosition)
.zoom(15.5f)
.build()));
marker.setRotation(getBearing(startPosition, new LatLng(destination.getLatitude(), destination.getLongitude())));
} catch (Exception ex) {
//I don't care atm..
}
}
});
valueAnimator.addListener(new AnimatorListenerAdapter() {
#Override
public void onAnimationEnd(Animator animation) {
super.onAnimationEnd(animation);
// if (mMarker != null) {
// mMarker.remove();
// }
// mMarker = googleMap.addMarker(new MarkerOptions().position(endPosition).icon(BitmapDescriptorFactory.fromResource(R.drawable.icon_car)));
}
});
valueAnimator.start();
}
}
private interface LatLngInterpolatorNew {
LatLng interpolate(float fraction, LatLng a, LatLng b);
class LinearFixed implements LatLngInterpolatorNew {
#Override
public LatLng interpolate(float fraction, LatLng a, LatLng b) {
double lat = (b.latitude - a.latitude) * fraction + a.latitude;
double lngDelta = b.longitude - a.longitude;
// Take the shortest path across the 180th meridian.
if (Math.abs(lngDelta) > 180) {
lngDelta -= Math.signum(lngDelta) * 360;
}
double lng = lngDelta * fraction + a.longitude;
return new LatLng(lat, lng);
}
}
}
//Method for finding bearing between two points
private float getBearing(LatLng begin, LatLng end) {
double lat = Math.abs(begin.latitude - end.latitude);
double lng = Math.abs(begin.longitude - end.longitude);
if (begin.latitude < end.latitude && begin.longitude < end.longitude)
return (float) (Math.toDegrees(Math.atan(lng / lat)));
else if (begin.latitude >= end.latitude && begin.longitude < end.longitude)
return (float) ((90 - Math.toDegrees(Math.atan(lng / lat))) + 90);
else if (begin.latitude >= end.latitude && begin.longitude >= end.longitude)
return (float) (Math.toDegrees(Math.atan(lng / lat)) + 180);
else if (begin.latitude < end.latitude && begin.longitude >= end.longitude)
return (float) ((90 - Math.toDegrees(Math.atan(lng / lat))) + 270);
return -1;
}
}

Since its been bit confusing for SO users to look for working code in two different posts. Here is the working code for Rotate and Move Marker which seamlessly worked for me.
in MainActivity.java
public void rotateMarker(final Marker marker, final float toRotation, final float st) {
final Handler handler = new Handler();
final long start = SystemClock.uptimeMillis();
final float startRotation = st;
final long duration = 1555;
final Interpolator interpolator = new LinearInterpolator();
handler.post(new Runnable() {
#Override
public void run() {
long elapsed = SystemClock.uptimeMillis() - start;
float t = interpolator.getInterpolation((float) elapsed / duration);
float rot = t * toRotation + (1 - t) * startRotation;
marker.setRotation(-rot > 180 ? rot / 2 : rot);
if (t < 1.0) {
// Post again 16ms later.
handler.postDelayed(this, 16);
}
}
});
}
public void animateMarker(final LatLng toPosition,final boolean hideMarke) {
final Handler handler = new Handler();
final long start = SystemClock.uptimeMillis();
Projection proj = googleMap.getProjection();
Point startPoint = proj.toScreenLocation(m.getPosition());
final LatLng startLatLng = proj.fromScreenLocation(startPoint);
final long duration = 5000;
final Interpolator interpolator = new LinearInterpolator();
handler.post(new Runnable() {
#Override
public void run() {
long elapsed = SystemClock.uptimeMillis() - start;
float t = interpolator.getInterpolation((float) elapsed
/ duration);
double lng = t * toPosition.longitude + (1 - t)
* startLatLng.longitude;
double lat = t * toPosition.latitude + (1 - t)
* startLatLng.latitude;
m.setPosition(new LatLng(lat, lng));
if (t < 1.0) {
// Post again 16ms later.
handler.postDelayed(this, 16);
} else {
if (hideMarke) {
m.setVisible(false);
} else {
m.setVisible(true);
}
}
}
});
}

Finally wrote the code that works exactly in the similar manner that OLA CABS does...
Here it is -
Put your google maps fragment in a Relative layout and put the marker(as image view ) in the center -
In your fragment's code once you have setup all the google maps basic working write the following code for the onMapReady(GoogleMap googleMap) function-
My Code is as follows -
//Step 1 -
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment
android:id="#+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MapsActivity_for_request_pages" />
<ImageView
android:layout_width="30sp"
android:layout_height="30sp"
android:layout_centerInParent="true"
android:id="#+id/central_marker"
android:src="#drawable/marker_pic"/>
</RelativeLayout>
//Step 2 -
#Override
public void onMapReady(GoogleMap googleMap) {
central_marker = (ImageView)v.findViewById(R.id.central_marker);
int init_loc = 0,final_loc = -300;
mMap = googleMap;
final CountDownTimer timer = new CountDownTimer(300,300) {
#Override
public void onTick(long millisUntilFinished) {
}
#Override
public void onFinish() {
init_loc = 0;
ObjectAnimator objectAnimatorY = ObjectAnimator.ofFloat(central_marker, "translationY", final_loc, init_loc);
objectAnimatorY.setDuration(200);
objectAnimatorY.start();
}
};
mMap.setOnCameraMoveStartedListener(new GoogleMap.OnCameraMoveStartedListener() {
#Override
public void onCameraMoveStarted(int i) {
System.out.println("Camera started moving worked");
timer.cancel();
ObjectAnimator objectAnimatorY = ObjectAnimator.ofFloat(central_marker, "translationY", init_loc, final_loc);
objectAnimatorY.setDuration(200);
objectAnimatorY.start();
init_loc = -300;
}
});
mMap.setOnCameraIdleListener(new GoogleMap.OnCameraIdleListener() {
#Override
public void onCameraIdle() {
System.out.println("Camera idle worked");
if(initial_flag!=0)
{
System.out.println("Camera Setting timer now");
timer.cancel();
timer.start();
}
initial_flag++;
System.out.println("Camera Value of initial_flag ="+initial_flag);
}
});
}

Firstly,I would like to thank you both #Vipin Negi & #Prasad for such a good & awesomely working code.Since there are many pending queries above, I want to make all the above stuff a little simpler. Guys, just follow the following steps to achieve the marker rotation.
1. Define below two methods in your MainActivity.java file
private double bearingBetweenLocations(LatLng latLng1, LatLng latLng2) {
double PI = 3.14159;
double lat1 = latLng1.latitude * PI / 180;
double long1 = latLng1.longitude * PI / 180;
double lat2 = latLng2.latitude * PI / 180;
double long2 = latLng2.longitude * PI / 180;
double dLon = (long2 - long1);
double y = Math.sin(dLon) * Math.cos(lat2);
double x = Math.cos(lat1) * Math.sin(lat2) - Math.sin(lat1)
* Math.cos(lat2) * Math.cos(dLon);
double brng = Math.atan2(y, x);
brng = Math.toDegrees(brng);
brng = (brng + 360) % 360;
return brng;
}
&
private void rotateMarker(final Marker marker, final float toRotation) {
final Handler handler = new Handler();
final long start = SystemClock.uptimeMillis();
final float startRotation = marker.getRotation();
final long duration = 1000;
final Interpolator interpolator = new LinearInterpolator();
handler.post(new Runnable() {
#Override
public void run() {
long elapsed = SystemClock.uptimeMillis() - start;
float t = interpolator.getInterpolation((float) elapsed / duration);
float rot = t * toRotation + (1 - t) * startRotation;
marker.setRotation(-rot > 180 ? rot / 2 : rot);
if (t < 1.0) {
// Post again 16ms later.
handler.postDelayed(this, 16);
}
}
});
}
2. After this, add the following lines to the code where you want your marker to rotate.
double bearing = bearingBetweenLocations(m.getPosition(), updatedLatLng);
rotateMarker(m, (float) bearing);
Note that "m" is your marker object that you want to rotate.
And, you're done!!!
If you want marker animation related help,you can use this code.

Try google default rotation or see the detail explanation Markers Rotation
private void updateCamera(LatLng currentLatLng, Location location) {
//googleMap.clear();
if (marker == null) {
MarkerOptions options = new MarkerOptions();
options.position(currentLatLng);
options.icon(BitmapDescriptorFactory.fromResource(R.mipmap.ic_driver_car_pin_v));
options.flat(true);
options.anchor(0.5f, 0.5f);
marker = googleMap.addMarker(options);
} else {
marker.setPosition(currentLatLng);
marker.setRotation(location.getBearing());
}
CameraPosition cameraPosition = new CameraPosition.Builder(googleMap.getCameraPosition())
.target(currentLatLng).zoom(18).build();
googleMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
}

Latitude and longitude per pixel Google static maps

I have a static map, i know center coordinates in latitude and longitude, zoom level and image dimensions.
I don't understood if google static maps are already flattened and latitude and longitude per pixel are the same anywhere. If it's not like that i whant to know how can i calculate latidude and longitude per pixel and then meters per pixel , and how does that values vary with latitude .
P.S. I'm developing an android application that download an static map and computes distance between 2 points , but i've done that asuming the lat and long per pixel are the same ...and doesn't depend on latitude(position on globe)
Here is my mainactivity
package com.mnav.nav;
import android.app.*;
import android.os.*;
import android.view.*;
import android.widget.*;
import android.view.View.*;
import java.net.*;
import org.apache.http.*;
import android.graphics.*;
import java.io.*;
import android.graphics.drawable.*;
public class MainActivity extends Activity
{ Button start, dist;
TextView txt;
EditText lat, longit, zoom;
ImageView img;
Handler mhandler ;
Bitmap bit, original;
Boolean run = false, firstpoint = false, secondpoint = false;
String z, latitude, longitude;
int level;
int[] pointa = new int[2];
int[] pointb = new int[2];
double unit;
int maxx, maxy, minx, miny, distx, disty, distance1;
double distance;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
start=(Button)findViewById(R.id.button);
lat = (EditText)findViewById(R.id.latitude);
longit = (EditText)findViewById(R.id.longitude);
img = (ImageView)findViewById(R.id.img);
zoom =(EditText)findViewById(R.id.zoom);
dist = (Button)findViewById(R.id.dist);
txt = (TextView)findViewById(R.id.txt);
mhandler = new Handler();
start.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v)
{ z = zoom.getText().toString();
latitude = lat.getText().toString();
longitude = longit.getText().toString();
Thread thr = new Thread(new GetImage());
thr.start();
}
});
img.setOnTouchListener(new OnTouchListener()
{
#Override
public boolean onTouch(View v, MotionEvent event)
{ int i, j;
int x = (int)event.getX();
int vertical = (int)event.getY();
if(secondpoint==true)
{ bit = original.copy(Bitmap.Config.ARGB_4444, true);
img.setImageBitmap(bit);
secondpoint = false;
}
txt.setText(Integer.toString(x)+ " "+Integer.toString(vertical));
for (i = x-2; i < x+3; i++)
{
for(j=vertical-2; j<vertical+3; j++)
{
bit.setPixel(i,j, Color.WHITE);
}
}
bit.setPixel(x,vertical,Color.GREEN);
img.setImageBitmap(bit);
if(firstpoint)
{
pointb[0] = x; pointb[1]=vertical;
secondpoint = true;
firstpoint = false;
}
else
{
pointa[0]=x; pointa[1]=vertical;
firstpoint=true;
}
return false;
}
});
dist.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View p1)
{
unit = 0.1412/800;
unit = unit*500;
level = Integer.parseInt(z);
if(level == 20)
{
unit = unit;
}
else
if(level == 19)
{
unit = unit*2;
}
else
if(level==18)
{
unit = unit*4;
}
else
if(level == 17)
{
unit =unit*8;
}
else
if(level==16)
{
unit = unit*16;
}
else
if(level==15)
{
unit = unit*32;
}
else
if(level==14)
{
unit = unit*64;
}
else
if(level==13)
{
unit = unit*128;
}
else
if(level == 12)
{
unit = unit*256;
}
else
if(level==11)
{
unit = unit*512;
}
else
if(level==10)
{
unit = unit*1024;
}
distx = Math.abs(pointa[0]-pointb[0]);
disty= Math.abs(pointa[1]-pointb[1]);
distance1 = distx*distx+disty*disty;
distance = Math.sqrt(distance1);
distance = unit*distance;
txt.setText(Double.toString(distance)+" meters");
}
});
}
public class GetImage implements Runnable
{
String Url = "http://maps.google.com/staticmap?center=" + latitude+","+longitude+"&format=png&zoom="+ z +"&size=500x500&scale=1&maptype=hybrid&key=ABQIAAAA-O3c-Om9OcvXMOJXreXHAxRexG7zW5nSjltmIc1ZE-b8yotBWhQYQEU3J87QIBc4nfuySpoW_K6woA";
Bitmap bmp;
#Override
public void run()
{
try
{ mhandler.post(new Runnable()
{
#Override
public void run()
{
txt.setText("Wait...file is downloading...");
}
});
bmp = BitmapFactory.decodeStream((InputStream)new URL(Url).getContent());
}
catch (IOException e)
{ mhandler.post(new Runnable()
{
#Override
public void run()
{
// TODO: Implement this method
Toast.makeText(getApplicationContext(), "Something wrong just happend", Toast.LENGTH_LONG).show();
}
});
e.printStackTrace();
}
mhandler.post(new Runnable()
{
#Override
public void run()
{
if (bmp!=null)
{ txt.setText("Map downloaded..");
img.setImageBitmap(bmp);
bit = ((BitmapDrawable)img.getDrawable()).getBitmap();
bit = bit.copy(Bitmap.Config.ARGB_4444, true);
original = bit.copy(Bitmap.Config.ARGB_4444, true);
}
else
{
mhandler.post(new Runnable()
{
#Override
public void run()
{
Toast.makeText(getApplicationContext(), "null bitmap, sorry", Toast.LENGTH_LONG).show();
}
});
}
}
});
}
}
}

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