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How can I get my own phone number programmatically in Android?

I tried the following code to get my own number and get a NULL string. What is the problem?

TelephonyManager mTelephonyMgr;     
 mTelephonyMgr = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);     
 String phoneNumber = mTelephonyMgr.getLine1Number();

Resolution

<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
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2 answers

Use TelephonyManager. getLine1Number ()

But you need to save the phone number on the SIM card , and there is no other way to get your own number.

Example:

TelephonyManager tm = (TelephonyManager)this.getApplicationContext().getSystemService(Context.TELEPHONY_SERVICE); 
String myPhoneNumber =  tm.getLine1Number();

and you need this permission in your Manifest.xml

<uses-permission android:name="android.permission.READ_PHONE_STATE"/>

See this question: Error TelephonyManager.getLine1Number ()? as described, you need to evaluate:

if("SIM card present" && "phone number is stored") {
  "get the phone number with TelephonyManager.getLine1Number"
}
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Add this to your manifest

<uses-permission android:name="android.permission.READ_PHONE_STATE"/>

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