I have made a very simple demo program for android map view (api v2) by referring the following link,But my program doesn't shows map.its not running.Please help me,My code is as below:
main.xml
<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:name="com.google.android.gms.maps.MapFragment"/>
main.java
package com.example.mymap;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.support.v4.app.FragmentActivity;
public class MainActivity extends FragmentActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
manifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.mymap"
android:versionCode="1"
android:versionName="1.0" >
<uses-feature
android:glEsVersion="0x00020000"
android:required="true"/>
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<permission
android:name="com.example.mymap.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="com.example.mymap.permission.MAPS_RECEIVE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.mymap.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="AIzaSyCuS-daQYgOZsmbIBYUTCl0P5tV0GTnjrI" />
</application>
</manifest>
Please try to use my running code.
Firstly import Google play service library project from /Android/android-sdk-linux/extras/google/google_play_services and after that create new project and write this code.
//Main Activity
package in.wptrafficanalyzer.multipleproximitymapv2;
import android.app.Dialog;
import android.app.PendingIntent;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Color;
import android.location.LocationManager;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.widget.Toast;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.GoogleMap.OnMapClickListener;
import com.google.android.gms.maps.GoogleMap.OnMapLongClickListener;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.CircleOptions;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
public class MainActivity extends FragmentActivity {
GoogleMap googleMap;
LocationManager locationManager;
PendingIntent pendingIntent;
SharedPreferences sharedPreferences;
int locationCount = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Getting Google Play availability status
int status = GooglePlayServicesUtil
.isGooglePlayServicesAvailable(getBaseContext());
// Showing status
if (status != ConnectionResult.SUCCESS) { // Google Play Services are
// not available
int requestCode = 10;
Dialog dialog = GooglePlayServicesUtil.getErrorDialog(status, this,
requestCode);
dialog.show();
} else { // Google Play Services are available
// Getting reference to the SupportMapFragment of activity_main.xml
SupportMapFragment fm = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
// Getting GoogleMap object from the fragment
googleMap = fm.getMap();
// Enabling MyLocation Layer of Google Map
googleMap.setMyLocationEnabled(true);
// Getting LocationManager object from System Service
// LOCATION_SERVICE
locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
// Opening the sharedPreferences object
sharedPreferences = getSharedPreferences("location", 0);
// Getting number of locations already stored
locationCount = sharedPreferences.getInt("locationCount", 0);
// Getting stored zoom level if exists else return 0
String zoom = sharedPreferences.getString("zoom", "0");
// If locations are already saved
if (locationCount != 0) {
String lat = "";
String lng = "";
// Iterating through all the locations stored
for (int i = 0; i < locationCount; i++) {
// Getting the latitude of the i-th location
lat = sharedPreferences.getString("lat" + i, "0");
// Getting the longitude of the i-th location
lng = sharedPreferences.getString("lng" + i, "0");
// Drawing marker on the map
drawMarker(new LatLng(Double.parseDouble(lat),
Double.parseDouble(lng)));
// Drawing circle on the map
drawCircle(new LatLng(Double.parseDouble(lat),
Double.parseDouble(lng)));
}
// Moving CameraPosition to last clicked position
googleMap.moveCamera(CameraUpdateFactory.newLatLng(new LatLng(
Double.parseDouble(lat), Double.parseDouble(lng))));
// Setting the zoom level in the map on last position is clicked
googleMap.animateCamera(CameraUpdateFactory.zoomTo(Float
.parseFloat(zoom)));
}
googleMap.setOnMapClickListener(new OnMapClickListener() {
public void onMapClick(LatLng point) {
// Incrementing location count
locationCount++;
// Drawing marker on the map
drawMarker(point);
// Drawing circle on the map
drawCircle(point);
// This intent will call the activity ProximityActivity
Intent proximityIntent = new Intent(
"in.wptrafficanalyzer.activity.proximity");
// Passing latitude to the PendingActivity
proximityIntent.putExtra("lat", point.latitude);
// Passing longitude to the PendingActivity
proximityIntent.putExtra("lng", point.longitude);
// Creating a pending intent which will be invoked by
// LocationManager when the specified region is
// entered or exited
pendingIntent = PendingIntent.getActivity(getBaseContext(),
0, proximityIntent, Intent.FLAG_ACTIVITY_NEW_TASK);
// Setting proximity alert
// The pending intent will be invoked when the device enters
// or exits the region 20 meters
// away from the marked point
// The -1 indicates that, the monitor will not be expired
locationManager.addProximityAlert(point.latitude,
point.longitude, 20, -1, pendingIntent);
/**
* Opening the editor object to write data to
* sharedPreferences
*/
SharedPreferences.Editor editor = sharedPreferences.edit();
// Storing the latitude for the i-th location
editor.putString(
"lat" + Integer.toString((locationCount - 1)),
Double.toString(point.latitude));
// Storing the longitude for the i-th location
editor.putString(
"lng" + Integer.toString((locationCount - 1)),
Double.toString(point.longitude));
// Storing the count of locations or marker count
editor.putInt("locationCount", locationCount);
/** Storing the zoom level to the shared preferences */
editor.putString("zoom",
Float.toString(googleMap.getCameraPosition().zoom));
/** Saving the values stored in the shared preferences */
editor.commit();
Toast.makeText(getBaseContext(),
"Proximity Alert is added", Toast.LENGTH_SHORT)
.show();
}
});
googleMap.setOnMapLongClickListener(new OnMapLongClickListener() {
public void onMapLongClick(LatLng point) {
Intent proximityIntent = new Intent(
"in.wptrafficanalyzer.activity.proximity");
pendingIntent = PendingIntent.getActivity(getBaseContext(),
0, proximityIntent, Intent.FLAG_ACTIVITY_NEW_TASK);
// Removing the proximity alert
locationManager.removeProximityAlert(pendingIntent);
// Removing the marker and circle from the Google Map
googleMap.clear();
// Opening the editor object to delete data from
// sharedPreferences
SharedPreferences.Editor editor = sharedPreferences.edit();
// Clearing the editor
editor.clear();
// Committing the changes
editor.commit();
Toast.makeText(getBaseContext(),
"Proximity Alert is removed", Toast.LENGTH_LONG)
.show();
}
});
}
}
private void drawCircle(LatLng point) {
// Instantiating CircleOptions to draw a circle around the marker
CircleOptions circleOptions = new CircleOptions();
// Specifying the center of the circle
circleOptions.center(point);
// Radius of the circle
circleOptions.radius(20);
// Border color of the circle
circleOptions.strokeColor(Color.BLACK);
// Fill color of the circle
circleOptions.fillColor(0x30ff0000);
// Border width of the circle
circleOptions.strokeWidth(2);
// Adding the circle to the GoogleMap
googleMap.addCircle(circleOptions);
}
private void drawMarker(LatLng point) {
// Creating an instance of MarkerOptions
MarkerOptions markerOptions = new MarkerOptions();
// Setting latitude and longitude for the marker
markerOptions.position(point);
// Adding InfoWindow title
markerOptions.title("Location Coordinates");
// Adding InfoWindow contents
markerOptions.snippet(Double.toString(point.latitude) + ","
+ Double.toString(point.longitude));
// Adding marker on the Google Map
googleMap.addMarker(markerOptions);
}
}
// activity_main
<fragment
android:id="@+id/map"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
class="com.google.android.gms.maps.SupportMapFragment" />
//Manifiest
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<permission
android:name="in.wptrafficanalyzer.multipleproximitymapv2.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-permission android:name="in.wptrafficanalyzer.multipleproximitymapv2.permission.MAPS_RECEIVE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="in.wptrafficanalyzer.multipleproximitymapv2.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".ProximityActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="in.wptrafficanalyzer.activity.proximity" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".NotificationView"
android:label="@string/app_name" >
<intent-filter>
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="AIzaSyD2fSGTakDlROXxr2IJeDH6f31b7BSc0F8" />
</application>
Add library to your AndroidManifest File:
<uses-library
android:name="com.google.android.maps"
android:required="true" />
Just check this:
package com.example.mymap;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.support.v4.app.FragmentActivity;
public class MainActivity extends FragmentActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
FragmentManager myFM = .getSupportFragmentManager();
SupportMapFragment myMAPF = (SupportMapFragment) myFM
.findFragmentById(R.id.fragment1);
MAP = myMAPF.getMap();
MAP.setMyLocationEnabled(true);
MAP.setMapType(GoogleMap.MAP_TYPE_HYBRID);
MAP.setOnMapClickListener(new OnMapClickListener() {
@Override
public void onMapClick(LatLng point) {
// TODO Auto-generated method stub
MAP.addMarker(new MarkerOptions().position(point).title(
point.toString()));
Log.e("lat", "" + point);
}
});
}
}
Your xml file will be:
<fragment
android:id="@+id/fragment1"
android:layout_width="match_parent"
android:layout_height="200dp"
android:layout_below="@+id/fragment1"
android:layout_centerHorizontal="true"
class="com.google.android.gms.maps.SupportMapFragment" />
And finally add libray in manifest file:
<uses-library
android:name="com.google.android.maps"
android:required="true" />
You should use SupportFragment Your min sdk is 8.
<fragment
class="com.google.android.gms.maps.SupportMapFragment"
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
Your activity must extend FragmentActivity
Import
import android.support.v4.app.FragmentActivity;
import com.google.android.gms.maps.SupportMapFragment;
Edit:
From your comments you say there is a error @
import com.google.android.gms.maps.SupportMapFragment;
So i guess you have not referenced google play services library project properly.
Download the Google Play services. Goto Windows. Goto Android Sdk Manager. Choose Google play services under extras.
Copy the google-play services_lib library project to your workspace. The library project can be found under the following path.
<android-sdk-folder>/extras/google/google_play_services/libproject/google-play-services_lib library project .
Import the library project to your eclipse
Click File > Import, select Android > Existing Android Code into Workspace, and browse the workspace import the library project. You can check if it is library project. Right click on the library project. Goto properties. Click Android on the left panel. You will see Is Library checked.
Try this.
In your xml file
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.SupportMapFragment"/>
In the java file
public class MapExampleActivity extends FragmentActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_map_example);
//setUpMap
}
I've faced many error when work with google map API V2. You can check these setting which solved my problem.
