Google Map not appearing in my MapActivity

Question

I have created a release keystore using the Eclipse IDE. I signed it using keytool and registered on Google Maps. I plugged in the key but my map doesn't show up.

Maps show up properly when I use the key associated with my debug keystore.

How can I diagnose this? I followed the same steps as i did with debug, for release.

UPDATE:

Here is my manifest file:

      <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.android.cancertrials" android:versionCode="1"
    android:versionName="1.0">
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.CALL_PHONE"/>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <application android:icon="@drawable/icon" android:label="@string/app_name" android:debuggable="true">
        <activity android:label="@string/app_name" android:name="splash">

            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".HomeActivity" android:label="@string/app_name" android:windowSoftInputMode="stateHidden">
        </activity>
        <activity android:name=".moreactivity" android:label="@string/app_name">
        </activity>
        <activity android:name=".aboutmedtrust" android:label="@string/app_name">
        </activity>
        <activity android:name=".aboutclinical" android:label="@string/app_name">
        </activity>
        <activity android:name=".aboutglaxosmith" android:label="@string/app_name">
        </activity>
        <activity android:name=".termsofuse" android:label="@string/app_name">
        </activity>
        <activity android:name=".privacy" android:label="@string/app_name">
        </activity>
        <activity android:name=".feedback" android:label="@string/app_name">
        </activity>
        <activity android:name=".informationcancer" android:label="@string/app_name">
        </activity>
        <activity android:name="AdvanceSearchActivity" android:label="@string/app_name">
        </activity>
        <activity android:name="SearchingActivity"></activity>
        <activity android:name="AdvanceSearchTab1"></activity>
        <activity android:name="AdvanceSearchTab2"></activity>
        <activity android:name="DetailedActivity"></activity>
        <activity android:name="summary"></activity>
        <activity android:name="conditions"></activity>
        <activity android:name="description"></activity>
        <activity android:name="inclusion"></activity>
        <activity android:name="exclusion"></activity>
        <activity android:name="BookmarkActivity"></activity>
        <activity android:name="RecentActivity"></activity>
        <activity android:name="information"></activity>
    <uses-library android:name="com.google.android.maps"></uses-library>
    <activity android:name="Mapsactivity">
    </activity>
    <activity android:name="mapView"></activity>

</application>
    <uses-sdk android:minSdkVersion="3" />

</manifest> 

Answer 1

You have to obtain a separate API key when signing with the release key store as your fingerprint changes.

Make sure to also install the .apk signed with the right key.

Update: What I meant is are you sure you sign your APK with the right key? That means are you sure you sign it with the release keystore when generating the APK?

When you are exporting it, are you actually really selecting the keystore with which to sign it?