Android - 휴대폰 전화번호 가져오는 방법

override fun onCreate(savedInstanceState: Bundle?) {
    ...

    val number = getPhoneNumber()
    Log.d("Test", "number: $number")
}

@SuppressLint("MissingPermission")
fun getPhoneNumber(): String {
    var tm = getSystemService(Context.TELEPHONY_SERVICE) as TelephonyManager
    return tm.line1Number
}

10-26 23:21:31.171 22398 22398 D Test    : number: 01012349876

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

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

<manifest>
    <!-- Grants the READ_PHONE_STATE permission only on devices that run
         Android 10 (API level 29) and lower. -->
    <uses-permission android:name="READ_PHONE_STATE"
                     android:maxSdkVersion="29" />
    <uses-permission android:name="READ_PHONE_NUMBERS" />
</manifest>

/**
 * Returns the phone number string for line 1, for example, the MSISDN
 * for a GSM phone for a particular subscription. Return null if it is unavailable.
 * <p>
 * The default SMS app can also use this.
 *
 * <p>Requires Permission:
 *     {@link android.Manifest.permission#READ_SMS READ_SMS},
 *     {@link android.Manifest.permission#READ_PHONE_NUMBERS READ_PHONE_NUMBERS},
 *     that the caller is the default SMS app,
 *     or that the caller has carrier privileges (see {@link #hasCarrierPrivileges})
 *     for any API level.
 *     {@link android.Manifest.permission#READ_PHONE_STATE READ_PHONE_STATE}
 *     for apps targeting SDK API level 29 and below.
 */
@RequiresPermission(anyOf = {
        android.Manifest.permission.READ_PHONE_STATE,
        android.Manifest.permission.READ_SMS,
        android.Manifest.permission.READ_PHONE_NUMBERS
})
public String getLine1Number() {
    return getLine1Number(getSubId());
}