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androidgoogle-maps-api-2

Android google maps API v2


I'm developing an android application using google maps API V2, the application crashed and I have this error.

06-04 12:26:31.980: E/AndroidRuntime(16726): FATAL EXCEPTION: main
06-04 12:26:31.980: E/AndroidRuntime(16726):
java.lang.NoClassDefFoundError: com.google.android.gms.R$styleable
06-04 12:26:31.980: E/AndroidRuntime(16726):    at
com.google.android.gms.maps.GoogleMapOptions.createFromAttributes(Unknown
Source) 06-04 12:26:31.980: E/AndroidRuntime(16726):    at
com.google.android.gms.maps.SupportMapFragment.onInflate(Unknown
Source) 06-04 12:26:31.980: E/AndroidRuntime(16726):    at
android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:279)
06-04 12:26:31.980: E/AndroidRuntime(16726):    at
android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:676)
06-04 12:26:31.980: E/AndroidRuntime(16726):    at
android.view.LayoutInflater.inflate(LayoutInflater.java:466) 06-04
12:26:31.980: E/AndroidRuntime(16726):  at
android.view.LayoutInflater.inflate(LayoutInflater.java:396) 06-04
12:26:31.980: E/AndroidRuntime(16726):  at
android.view.LayoutInflater.inflate(LayoutInflater.java:352) 06-04
12:26:31.980: E/AndroidRuntime(16726):  at
com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:256)
06-04 12:26:31.980: E/AndroidRuntime(16726):    at
android.app.Activity.setContentView(Activity.java:1867) 06-04
12:26:31.980: E/AndroidRuntime(16726):  at
com.its.android.MainActivity.onCreate(MainActivity.java:29) 06-04
12:26:31.980: E/AndroidRuntime(16726):  at
android.app.Activity.performCreate(Activity.java:5008) 06-04
12:26:31.980: E/AndroidRuntime(16726):  at
android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
06-04 12:26:31.980: E/AndroidRuntime(16726):    at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
06-04 12:26:31.980: E/AndroidRuntime(16726):    at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)

I can display the map with this code

public class MainActivity extends FragmentActivity {

    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();
    }
}

but when I try to add a marker with this code, the application crash

public class MainActivity extends FragmentActivity {

    private GoogleMap mMap;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        setUpMapIfNeeded();
    }

    @Override
    protected void onResume() {
        super.onResume();
        setUpMapIfNeeded();
    }

    private void setUpMapIfNeeded() {

        if (mMap == null) {

            mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
                    .getMap();

            if (mMap != null) {
                setUpMap();
            }
        }
    }

    private void setUpMap() {
        mMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("Marker"));
    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/map"
    android:name="com.google.android.gms.maps.SupportMapFragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

I have added the libraries of Google service.

AndroidManifest.xml

<?xml version="1.0" encoding="UTF-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.its.android"
    android:versionCode="1"
    android:versionName="1.0">

    <uses-SDK
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <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" />

    <permission
        android:name="com.its.android.permission.MAPS_RECEIVE"
        android:protectionLevel="signature" />
    <uses-permission android:name="com.its.android.permission.MAPS_RECEIVE" />

    <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.its.android.SplashActivity"
            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="com.its.android.MainActivity"
            android:label="@string/app_name" />

        <uses-library android:name="com.google.android.maps" />
        <meta-data
            android:name="com.google.android.maps.v2.API_KEY"
            android:value="xxxxx" />
    </application>

</manifest>

Solution

  • You are doing it the wrong way:

    From the activity layout file you do this:

    <?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.SupportMapFragment"/>
    

    So you define a map fragment in your xml file.

    From the other hand you are trying to create an instance of the map fragment from code and adding it manualy:

     SupportMapFragment fragment = new SupportMapFragment();
    getSupportFragmentManager().beginTransaction()
            .add(android.R.id.content, fragment).commit();
    

    So basically you are adding the map fragment twice, and they are not connected one to another.

    Another thing you should do is to remove this line:

    <uses-library android:name="com.google.android.maps" />     
    

    it's a API V1 permission and has nothing to do with API V2.