Google Map is not getting loaded in Android native app

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http://stackoverflow.com – I tried Google map with android app, but my effort went futile. I even went through many question for the same issue in Stackoverflow , but none of the answers solved my problem. So I am reposting the questions once again with hope of getting my issue solved. I followed the this tutorial(http://www.androidhive.info/2013/08/android-working-with-google-maps-v2/) for designing my app. Code: MainActivity.java package com.example.hopemap; import android.app.Activity; import android.os.Bundle; import android.view.Menu; import android.widget.Toast; import com.google.android.gms.maps.GoogleMap; i (HowTos)