Hello Friends,
This is my small tutorial on google map v2. This blogs covers
following point:
1. Start Drawing on Google Map | Draw geometry on Google map
2. Clear drawing | Clear polygon
3. Close Polygon
4. Save Geometry
Screen 1: Click on start drawing button and starting drawing geometry or polygon
or polyline.
Screen2: Click on close polygon button which close the polygon.
Here is my code:
1. MainActivity.java
Download Complete Code : GoogleMapV2
Enjoy Coding ..... cheers :)
This is my small tutorial on google map v2. This blogs covers
following point:
1. Start Drawing on Google Map | Draw geometry on Google map
2. Clear drawing | Clear polygon
3. Close Polygon
4. Save Geometry
Screen 1: Click on start drawing button and starting drawing geometry or polygon
or polyline.
Screen2: Click on close polygon button which close the polygon.
Here is my code:
1. MainActivity.java
/*
* Copyright (C) 2014 Mukesh Y authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package info.androiddeveloper.googlemapsv2;
import java.util.ArrayList;
import org.osmdroid.api.IGeoPoint;
import org.osmdroid.util.GeoPoint;
import android.annotation.SuppressLint;
import android.app.ActionBar;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.graphics.Color;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.widget.Toast;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.GoogleMap.OnMapClickListener;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import com.google.android.gms.maps.model.Polygon;
import com.google.android.gms.maps.model.PolygonOptions;
import com.google.android.gms.maps.model.PolylineOptions;
/**
* @author Mukesh Y
*/
public class MainActivity extends Activity implements OnMapClickListener {
// Google Map
private GoogleMap googleMap;
ArrayList latLang = new ArrayList();
ArrayList listPoints = new ArrayList();
boolean isGeometryClosed = false;
Polygon polygon;
Context context = MainActivity.this;
boolean isStartGeometry = false;
@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
try {
initilizeMap();
ActionBar actionBar = this.getActionBar();
actionBar.setDisplayHomeAsUpEnabled(true);
actionBar.setDisplayShowCustomEnabled(true);
actionBar.setDisplayShowTitleEnabled(true);
actionBar.setIcon(R.drawable.ic_launcher);
} catch (Exception e) {
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater menuInflater = getMenuInflater();
menuInflater.inflate(R.menu.map_menu, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_normal:
googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
return true;
case R.id.action_hybrid:
googleMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
return true;
case R.id.action_satellite:
googleMap.setMapType(GoogleMap.MAP_TYPE_SATELLITE);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
/**
* function to load map. If map is not created it will create it for you
* */
private void initilizeMap() {
if (googleMap == null) {
googleMap = ((MapFragment) getFragmentManager().findFragmentById(
R.id.map)).getMap();
// check if map is created successfully or not
if (googleMap == null) {
Toast.makeText(this, "Sorry! unable to create maps",
Toast.LENGTH_SHORT).show();
return;
}
googleMap.getUiSettings().setMyLocationButtonEnabled(true);
// set my location
googleMap.setMyLocationEnabled(true);
googleMap.getUiSettings().setCompassEnabled(false);
googleMap.getUiSettings().setRotateGesturesEnabled(false);
// set zooming controll
googleMap.getUiSettings().setZoomControlsEnabled(true);
googleMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
googleMap.setOnMapClickListener(this);
}
}
public void Draw_Map() {
PolygonOptions rectOptions = new PolygonOptions();
rectOptions.addAll(latLang);
rectOptions.strokeColor(Color.BLUE);
rectOptions.fillColor(Color.CYAN);
rectOptions.strokeWidth(7);
polygon = googleMap.addPolygon(rectOptions);
}
@Override
protected void onResume() {
super.onResume();
}
/**
* Close the Polygon / join last point to first point
*
* @param view
*/
public void closePolygon(View view) {
if (latLang.size() > 0) {
Draw_Map();
isGeometryClosed = true;
isStartGeometry = false;
}
}
/**
* Close the Polygon / join last point to first point
*
* @param view
*/
public void startDrawing(View view) {
isStartGeometry = true;
}
@Override
public void onMapClick(LatLng latlan) {
if (!isGeometryClosed && isStartGeometry) {
latLang.add(latlan);
GeoPoint point = new GeoPoint(latlan.latitude, latlan.longitude);
listPoints.add((IGeoPoint) point);
MarkerOptions marker = new MarkerOptions().position(latlan);
googleMap.addMarker(marker);
if (latLang.size() > 1) {
PolylineOptions polyLine = new PolylineOptions().color(
Color.BLUE).width((float) 7.0);
polyLine.add(latlan);
LatLng previousPoint = latLang.get(latLang.size() - 2);
polyLine.add(previousPoint);
googleMap.addPolyline(polyLine);
}
}
}
/**
* Clear the all draw lines
*
* @param view
* Current view of activity
*/
public void clearCanvas(View view) {
try {
AlertDialog.Builder alertdalogBuilder = new AlertDialog.Builder(
context);
alertdalogBuilder.setTitle("Clear");
alertdalogBuilder
.setMessage(
"Do you really want to clear the geometry? This action can't be undone!")
.setCancelable(false)
.setPositiveButton("Yes",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int id) {
// polygon.remove();
googleMap.clear();
latLang = new ArrayList();
listPoints = new ArrayList();
isGeometryClosed = false;
}
})
.setNegativeButton("No",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
dialog.cancel();
}
});
// Create Alert Dialog
AlertDialog alertdialog = alertdalogBuilder.create();
// show the alert dialog
alertdialog.show();
} catch (Exception e) {
}
}
/**
* Method for Save Property
*
* @param view
*/
public void savePolygon(View view) {
try {
if (isGeometryClosed) {
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
context);
alertDialogBuilder.setTitle("Save");
alertDialogBuilder
.setMessage(
"Do you really want to save? This action can't be undone!")
.setCancelable(false)
.setPositiveButton("Yes",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int id) {
// if this button is clicked, close
// current activity
// Prop.this.finish();
savePolygonAfterAlert();
}
})
.setNegativeButton("No",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int id) {
// if this button is clicked, just close
// the dialog box and do nothing
dialog.cancel();
}
});
// create alert dialog
AlertDialog alertDialog = alertDialogBuilder.create();
// show it
alertDialog.show();
} else {
showDialog(context, "Alert", "Close geometry before saving");
}
} catch (Exception e) {
}
}
/**
* Save the Polygon made by user
*
* @param view
*/
public void savePolygonAfterAlert() {
// save geometry of polygon
}
/**
* Method to show the Dialog box
*
* @param ctx
* @param title
* @param msg
*/
public void showDialog(Context ctx, String title, String msg) {
AlertDialog.Builder dialog = new AlertDialog.Builder(ctx);
dialog.setTitle(title).setMessage(msg).setCancelable(true);
dialog.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
AlertDialog alertDialog = dialog.create();
alertDialog.show();
}
}
Download Complete Code : GoogleMapV2
Enjoy Coding ..... cheers :)
