//This is Appbrain's receiver
<receiver android:exported="true" android:name="com.appbrain.ReferrerReceiver" >
    <intent-filter>
        <action android:name="com.android.vending.INSTALL_REFERRER" />
    </intent-filter>
</receiver>


//This is Inmobi's receiver
<receiver android:name="com.inmobi.adtracker.androidsdk.IMAdTrackerInstallRefererReciever" android:exported="true"  >
   <intent-filter>
      <action android:name="com.android.vending.INSTALL_REFERRER" />
      <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
   </intent-filter>
</receiver>


//This is My Custom receiver
<receiver android:name="com.xgame.adproject2.TestReceiver" android:exported="true" >
    <intent-filter>
        <action android:name="com.android.vending.INSTALL_REFERRER" />
    </intent-filter>
</receiver>

// source
public class TestReceiver extends BroadcastReceiver{

    public static final String TAG = "TEST";

    String referrerString = "";

    @Override
    public final void onReceive(Context context, Intent intent) {

        Log.e(TAG, "11111111");

        if(intent.getAction().equals("com.android.vending.INSTALL_REFERRER")) {
           Bundle extras = intent.getExtras();
           referrerString = extras.getString("referrer");

           Log.e(TAG, "REFERRER: " + referrerString);
        }
    }
}

//This is Appbrain's receiver
<receiver android:exported="true" android:name="com.appbrain.ReferrerReceiver" >
    <intent-filter>
        <action android:name="com.android.vending.INSTALL_REFERRER" />
    </intent-filter>
    <meta-data android:name="forward.inmobi" android:value="com.inmobi.adtracker.androidsdk.IMAdTrackerInstallRefererReciever" />
    <meta-data android:name="forward.custom" android:value="com.xgame.adproject2.TestReceiver" />
</receiver>

// Keep the execution of InMobi on connectivity change
<receiver android:name="com.inmobi.adtracker.androidsdk.IMAdTrackerInstallRefererReciever" android:exported="true" >
   <intent-filter>
      <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
   </intent-filter>
</receiver>