Develop Reference

Can't get map with Google Map API V2

I'm trying to get a simple map on my app by using Google Map API V2; I followed all the steps to do it but when I launch my app, I only get white page with a Google logo in the left bottom.
If someone can help me with this, it will be great..
This is the XML file:
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/map" tools:context=".MapsActivity"
android:name="com.google.android.gms.maps.SupportMapFragment"/>
This is the file Java:
package com.example.ismail.location_test;
import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
public class MapsActivity extends FragmentActivity {
private GoogleMap mMap;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
setUpMapIfNeeded();
}
#Override
protected void onResume() {
super.onResume();
setUpMapIfNeeded();
}
private void setUpMapIfNeeded() {
// Do a null check to confirm that we have not already instantiated the map.
if (mMap == null) {
// Try to obtain the map from the SupportMapFragment.
mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
.getMap();
// Check if we were successful in obtaining the map.
if (mMap != null) {
setUpMap();
}
}
}
private void setUpMap() {
mMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("Marker"));
}
}
And finally the Manifest:
<?xml version="1.0" encoding="utf-8"?>
<uses-sdk
android:minSdkVersion="17"
android:targetSdkVersion="21" />
<uses-permission android:name="com.example.ismail.location_test.permission.MAPS_RECEIVE"/>
<permission android:name="com.example.ismail.location_test.permission.MAPS_RECEIVE" android:protectionLevel="signature"/>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<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"/>
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="AIzaSyBbHBnsC_YhHKQhhsnaahYiT3GltK52It0" />
<activity
android:name=".MapsActivity"
android:label="#string/title_activity_maps" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>

I don't see anything wrong with your code. The symptom you decribe point to a not valid api key or gps is turned off, or even your are running this is an emulator with no google play installed. Check what google play versions is installed and used under build.gradle. eg:
dependencies {
compile 'com.google.android.gms:play-services:6.5.87'
I suggest you post your debuger log, if it is an api error it will state it there.

I suspect 3 things wrong in your code :
(1) Declare permission before using it :
<permission android:name="com.example.ismail.location_test.permission.MAPS_RECEIVE" android:protectionLevel="signature"/>
<!-- after declare use this -->
<uses-permission android:name="com.example.ismail.location_test.permission.MAPS_RECEIVE"/>
(2) Missing Declare gms version variable :
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
(3) Missing declare API_KEY :
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="AIzaS33yBBDxSDFsdf33BK-7HCasdfSADFfa72wJnKLZvq6A" />
Please check with above 3 suspects first : then if still error is there you can re-confirm steps to enable Google Maps from here

R cannot be resolved to a variable (on google maps)

i know this sound stupid by asking the question that many people had already asked before, but i am getting frustated by now because every answer that i looked after (more time than i care to mention), regarding those error could not make my code right.
i watched the code making in youtube and downloaded here.
anyway here is my sample code
package com.example.googlemapsdemo;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import com.google.android.gms.maps.CameraUpdate;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
public class MainActivity extends Activity {
private final LatLng LOCATION_PALEMBANG = new LatLng(-2.938201, 104.6892742);
private final LatLng LOCATION_JOHOR = new LatLng(1.5618762, 103.6365218);
private GoogleMap map;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main); <-----this line (R cannot be resolved to a variable)
map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap(); <-----this line (R cannot be resolved to a variable)
map.addMarker(new MarkerOptions().position(LOCATION_PALEMBANG).title("Find me here!"));
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu); <--- this line (same error)
return true;
}
public void onClick_City(View v) {
// CameraUpdate update = CameraUpdateFactory.newLatLng(LOCATION_PALEMBANG);
map.setMapType(GoogleMap.MAP_TYPE_SATELLITE);
CameraUpdate update = CameraUpdateFactory.newLatLngZoom(LOCATION_PALEMBANG, 9);
map.animateCamera(update);
}
public void onClick_Burnaby(View v) {
map.setMapType(GoogleMap.MAP_TYPE_TERRAIN);
CameraUpdate update = CameraUpdateFactory.newLatLngZoom(LOCATION_PALEMBANG, 14);
map.animateCamera(update);
}
public void onClick_Surrey(View v) {
map.setMapType(GoogleMap.MAP_TYPE_NORMAL);
CameraUpdate update = CameraUpdateFactory.newLatLngZoom(LOCATION_JOHOR, 16);
map.animateCamera(update);
}
}
and this is my android manifest
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.googlemapsdemo"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="11"
android:targetSdkVersion="17" />
<permission
android:name="com.example.googlemapsdemo.permission.MAPS_RECEIVE"
android:protectionLevel="signature"/>
<uses-permission android:name="com.example.googlemapsdemo.permission.MAPS_RECEIVE"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
<!-- The following two permissions are not required to use
Google Maps Android API v2, but are recommended. -->
<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"/>
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<uses-library
android:name="com.example.googlemapsdemo" />
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="AIzaSyCravI-Yxyh1702ZX9s4O5cL_lWmoGz9qo"/>
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
<activity
android:name="com.example.googlemapsdemo.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>
</application>
and activity main code :
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<Button
android:id="#+id/btnJohor"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:onClick="onClick_Johor"
android:text="Johor" />
<fragment
android:id="#+id/map"
android:name="com.google.android.gms.maps.MapFragment"
android:layout_below="#+id/btnSurrey"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
<Button
android:id="#+id/btnPalembang"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:onClick="onClick_Palembang"
android:text="Palembang" />
<Button
android:id="#+id/btnCity"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:onClick="onClick_City"
android:text="City" />
also i'm having a problem with my values-v14, it is said that :" Error retrieving parent for item: No resource found that matches the given name 'android:Theme.Holo.Light.DarkActionBar'."
please can anybody help me ?

This error is usually caused by either of these possibilities:
The most probable: You have a syntax error in any of your layout files (i.e., the files located under the res\layout folder of your project). The bad thing of this is that Eclipse won't warn you and tell you where's the error, so you'll have to go one by one looking for the syntax (probably an unmatched tag, an unmatched attribute, etc.) and fix the issue.
The other possibility is a syntax error within your AndroidManifest.xml file. Same goes here, check it for syntax errors.
One of these two will fix your issue.

Android: Testing app on Google Maps

I have a tablet Genesis GT-7240, Android 4.1.1, Kernel 3.0.36+.
My manifest.xml:
<uses-sdk android:minSdkVersion="11" android:targetSdkVersion="17" />
It is a simple app, using Google Maps and so it must be compiled with API GOOGLE.
As I testing in a real device, I checked 'Unknown sources', copied the compiled apk into 'download' folder of the tablet, and I tried install it as I always usually do.
However, has a message
X App not instaled.
Another tablet, which has Android 3.2, the same app works perfectly.
Is there a issue with Android 4.1 and Api Google compilation?
[Editing]
My manifest.xml is:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="MY_PACKAGE_HERE"
android:versionCode="1"
android:versionName="1.0" >
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-feature android:glEsVersion="0x00020000" android:required="true"/>
<permission android:name="MY_PACKAGE_HERE.permission.MAPS_RECEIVE"
android:protectionLevel="signature"/>
<uses-permission android:name="MY_PACKAGE_HERE.permission.MAPS_RECEIVE"/>
<uses-sdk
android:minSdkVersion="11"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="MY_PACKAGE_HERE.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>
<uses-library android:required="true" android:name="com.google.android.maps" />
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
<meta-data android:name="com.google.android.maps.v2.API_KEY"
android:value="MY_APY_KEY_HERE"/>
</application>
</manifest>
My activity_main layout:
<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:id="#+id/map"
android:layout_width="wrap_content"
android:layout_height="match_parent"
/>
My MainActivity.java:
package MY_PACKAGE_HERE;
import android.app.Dialog;
import android.os.Bundle;
import android.support.v4.app.*;
import android.view.Menu;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
public class MainActivity extends FragmentActivity {
private GoogleMap gm;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getBaseContext());
if (status == ConnectionResult.SUCCESS) {
SupportMapFragment supportMapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
gm = supportMapFragment.getMap();
}
else {
int requestCode = 10;
Dialog dialog = GooglePlayServicesUtil.getErrorDialog(status, this, requestCode);
dialog.show();
}
}//onCreate
//*****************************
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}

GoogleMapsDemo gives IllegalStateException

I have did all steps which is give at google but lastly it give's this
errorCaused by: java.lang.IllegalStateException: The meta-data tag in your app's AndroidManifest.xml does not have the right value. Expected 4132500 but found 0. You must have the following declaration within the <application> element: <meta-data android:name="com.google.android.gms.version" android:value="#integer/google_play_services_version" />
AndroidManifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.googlemapsdemo"
android:versionCode="1"
android:versionName="1.0" >
<permission
android:name="com.example.googlemapsdemo.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-permission android:name="com.example.googlemapsdemo.permission.MAPS_RECEIVE" />
<uses-sdk
android:minSdkVersion="12"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<!-- Required to show current location -->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<!-- Required OpenGL ES 2.0. for Maps V2 -->
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.googlemapsdemo.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="AIzaSyBLHwjdXsQK0sszxfrkoncHlqU3d2mDJok" />
</application>
</manifest>
MainActivity.java:
package com.example.googlemapsdemo;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.Toast;
public class MainActivity extends Activity
{
private GoogleMap googleMap;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
try
{
// Loading map
initilizeMap();
} catch (Exception e)
{
e.printStackTrace();
}
}
/**
* 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(getApplicationContext(),
"Sorry! unable to create maps", Toast.LENGTH_SHORT)
.show();
}
}
}
#Override
protected void onResume()
{
super.onResume();
initilizeMap();
}
}

manifest file
For eclipse add this :
<meta-data android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
If you are using Android Studio(latest version) with gradle0.7+ then add this line:
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="Your Key" />

Add the Google Play services version to your app's manifest
Edit your application's AndroidManifest.xml file, and add the
following declaration within the element. This embeds the version of
Google Play services that the app was compiled with.
You just need to add <meta-data> under <application> tag into your AndroidManifest.xml
....<application>
<meta-data android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
</application>

googlemap is not show on emulator

Xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<fragment
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.MapFragment" />
</RelativeLayout>
Activity
package com.example.googlemap;
import android.annotation.SuppressLint;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
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;
public class MainActivity extends FragmentActivity {
static final LatLng HAMBURG = new LatLng(53.558, 9.927);
static final LatLng KIEL = new LatLng(53.551, 9.993);
private GoogleMap map;
//#SuppressLint("NewApi")
#SuppressLint("NewApi")
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// SupportMapFragment fragment = new SupportMapFragment();
// getSupportFragmentManager().beginTransaction()
// .add(android.R.id.content, fragment).commit();
map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)) .getMap();
Marker hamburg = map.addMarker(new MarkerOptions().position(HAMBURG)
.title("Hamburg"));
Marker kiel = map.addMarker(new MarkerOptions()
.position(KIEL)
.title("Kiel")
.snippet("Kiel is cool")
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.ic_launcher)));
// Move the camera instantly to hamburg with a zoom of 15.
map.moveCamera(CameraUpdateFactory.newLatLngZoom(HAMBURG, 15));
// Zoom in, animating the camera.
map.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);
}
}
Manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.googlemap"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="8" />
<permission
android:name="com.example.googlemap.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<uses-permission android:name="com.example.googlemap.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" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.googlemap.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="AIzaSyCcdbqI_CdaghJQ7VTeXIE1djmnlfZq_Qs" />
</application>
</manifest>
but code is not working,
error like this
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.googlemap/com.example.googlemap.MainActivity}: android.view.InflateException: Binary XML file line #7: Error inflating class fragment

Make sure that your emulator support Google api.
if not than launch new emulator including Google api and run your code with this new emulator.

The Google Map v2 requires the Google Play Services to run and AFAIK the emulator doesn't contains the Google Play Services so you can not run the google map in your emulator.
To use the Google Maps Android API v2 in your app, you will first need to install the Google Play services SDK.
For more details check out Link

I agree with Pratik check if your Google Play Service Lib has been added to your project first.
If it is already in your project, it is probably because your minSDKversion is only 8 and not at the minimum of 11 for MapFragment to work, and hence instead of using MapFragment you will need to be using SupportMapFragment instead.
map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();
needs to be changed to SupportMapFragment
and so does :
<fragment
android:id="#+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.MapFragment" />