Google map api v2 shows blank screen with only zoom buttons on emulator

Question

Solution The problem was caused by Google Maps Android API v2 not being supported on emulator. Using a real device for testing solved the problem.

Question I am trying for google map, I got API key from Google. But when I run an application it shows blank white screen with zoom buttons

Here is my code - MainActivity.java

public class MainActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    @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;
    }

}

Here is my XML file - activity_main.XML

<LinearLayout 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" >

    <fragment 
         class="com.google.android.gms.maps.MapFragment"
        android:id="@+id/map"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        />
</LinearLayout>

Here is Manifest.XML file

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.demogooglemapv2"
    android:versionCode="1"
    android:versionName="1.0" >

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

<permission
         android:name="com.example.demogooglemapv2.permission.MAPS_RECEIVE"
         android:protectionLevel="signature"/>

<uses-permission  android:name="com.example.demogooglemapv2.permission.MAPS_RECEIVE"/>
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>

    <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" >

        <meta-data 
           android:name="com.google.android.maps.v2.API_KEY"
            android:value="AIzaSyB2jvxyj-WbkYc1Y1WR9Sc1E1W22QywA_k"
            />
        <activity
            android:name="com.example.demogooglemapv2.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>
</manifest>

Answer 1

You should generate maps key with debug/release key-store Where the APK will be build.

Answer 2

To generate map api key with debug keystore follow this.Try this with command prompt

C:\Program Files\Java\jdk1.7.0_01\bin\keytool.exe -v -list -alias androiddebugkey -keystore "C:\Users\android3\.android\debug.keystore" -storepass android -keypass android

Note:debug.keystore path will be change for you from C:\Users\android3\.android\debug.keystore by default debugkeystore is present in .android folder