Google Map not showing up in Android

Question

1) It's showing empty map with grey color only with +(zoom in) and -(zoom out) buttons.

2) I extracted the SHA1 key from the debug.keystore and generated the MAP API V2 key in the console.

3) I pasted that key in the manifest file.

4) GOOGLE MAP API V2 switched ON

and i use my Nexus 7 for debugging(USB Debugging)

• LogCat Message :

Failed to load map. Error contacting Google servers. This is probably an authentication issue (but could be due to network errors).

Please help if i went somewhere wrong in these files.

AndoidManifest.xml

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

   <uses-sdk android:minSdkVersion="10" android:targetSdkVersion="17" />
   <permission android:name="metro.tailors.permission.MAPS_RECEIVE"    android:protectionLevel="signature"/>
 <uses-permission android:name="metro.tailors.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"/>
 <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" >
      <activity
          android:name="metro.tailors.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="metro.tailors.FactorsActivity"
        android:label="@string/title_activity_factors" >
    </activity>
    <activity
        android:name="metro.tailors.LadiesCategoryActivity"
        android:label="@string/title_activity_ladies_category" >
    </activity>
    <activity
        android:name="metro.tailors.GentsCategoryActivity"
        android:label="@string/title_activity_gents_category" >
    </activity>
    <activity
        android:name="metro.tailors.MapActivity"
        android:label="@string/title_activity_map" >
    </activity>
    <meta-data
 android:name="com.google.android.maps.v2.API_KEY"
 android:value="AIzaSyA2pMJiaPfwlz2yKaRNMZHykQkY_******"/>

</application>
</manifest>

This the XML File of the MapActivity

        <?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"/>

MapActivity.java

        package metro.tailors;

        import android.os.Bundle;
        import android.app.Activity;

        public class MapActivity extends Activity {

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

        }

Answer 1

4) GOOGLE MAP API V2 switched ON

You should turn on Google Maps for Android:

Fragment support start only from API > 11, So either change your manifest file to that or add android-support Library and use the SupportMapFragment object along side with FragmentActivity.

To download support library check the below link.

http://developer.android.com/tools/extras/support-library.html#Downloading

The doc states Use MapFragment class only if you are targeting API 12 and above. Otherwise, use SupportMapFragment.

https://developers.google.com/maps/documentation/android/reference/com/google/android/gms/maps/MapFragment.