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javaandroidnullpointerexceptiontelephonymanagerimei
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Reputation: 155

TelephonyManager throws Null Pointer Exception in MainActivity

I want to declare TelephonyManager in MainActivity not OnCreate. In OnCreate there is no problem but when I use in MainActivity it gives a null pointer exception. Structure of my code is needed to declare TelephonyManager in MainActivity.

public class MainActivity extends Activity {


    TelephonyManager mngr = (TelephonyManager) getApplicationContext().getSystemService(getApplicationContext().TELEPHONY_SERVICE);//Error line here.
    String imei = mngr.getDeviceId();

 protected void onCreate(Bundle savedInstanceState) {
//My jobs
}
}

How to solve this problem?

Upvotes: 2

Views: 980

Answers (1)

maayanpolitzer
maayanpolitzer

Reputation: 21

Copy this line into your onCreate method:

TelephonyManager manager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);

You are in a class that extends Activity (Activity extends Context), so you can call Context's methods directly from your class.

Upvotes: 2

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