안드로이드에서 모바일 네트워크 구분하기 (2G, 3G, 4G, 5G)

example.java

package com.example.mymobilenetworktype; import androidx.appcompat.app.AppCompatActivity; import androidx.core.app.ActivityCompat; import android.Manifest; import android.content.pm.PackageManager; import android.os.Bundle; import android.telephony.TelephonyManager; import android.widget.TextView; import static android.telephony.TelephonyManager.NETWORK_TYPE_1xRTT; import static android.telephony.TelephonyManager.NETWORK_TYPE_CDMA; import static android.telephony.TelephonyManager.NETWORK_TYPE_EDGE; import static android.telephony.TelephonyManager.NETWORK_TYPE_EVDO_0; import static android.telephony.TelephonyManager.NETWORK_TYPE_EVDO_A; import static android.telephony.TelephonyManager.NETWORK_TYPE_EVDO_B; import static android.telephony.TelephonyManager.NETWORK_TYPE_GPRS; import static android.telephony.TelephonyManager.NETWORK_TYPE_HSDPA; import static android.telephony.TelephonyManager.NETWORK_TYPE_HSPA; import static android.telephony.TelephonyManager.NETWORK_TYPE_HSPAP; import static android.telephony.TelephonyManager.NETWORK_TYPE_IDEN; import static android.telephony.TelephonyManager.NETWORK_TYPE_LTE; import static android.telephony.TelephonyManager.NETWORK_TYPE_NR; import static android.telephony.TelephonyManager.NETWORK_TYPE_UMTS; public class MainActivity extends AppCompatActivity {     private TextView textView;     private TelephonyManager telephonyManager;     @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);         textView = findViewById(R.id.textView);         ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.READ_PHONE_STATE}, PackageManager.PERMISSION_GRANTED);         telephonyManager = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);         if (ActivityCompat.checkSelfPermission(this, Manifest.permission.READ_PHONE_STATE) != PackageManager.PERMISSION_GRANTED) {             // TODO: Consider calling             //    ActivityCompat#requestPermissions             // here to request the missing permissions, and then overriding             //   public void onRequestPermissionsResult(int requestCode, String[] permissions,             //                                          int[] grantResults)             // to handle the case where the user grants the permission. See the documentation             // for ActivityCompat#requestPermissions for more details.             return;         }         switch (telephonyManager.getDataNetworkType()) {             case NETWORK_TYPE_EDGE:             case NETWORK_TYPE_GPRS:             case NETWORK_TYPE_CDMA:             case NETWORK_TYPE_IDEN:             case NETWORK_TYPE_1xRTT:                 textView.setText("2G");                 break;             case NETWORK_TYPE_UMTS:             case NETWORK_TYPE_HSDPA:             case NETWORK_TYPE_HSPA:             case NETWORK_TYPE_HSPAP:             case NETWORK_TYPE_EVDO_0:             case NETWORK_TYPE_EVDO_A:             case NETWORK_TYPE_EVDO_B:                 textView.setText("3G");                 break;             case NETWORK_TYPE_LTE:                 textView.setText("4G");                 break;             case NETWORK_TYPE_NR:                 textView.setText("5G");                 break;             default:                 textView.setText("Unknown");         }     } }

 

[출처] https://programmerworld.co/android/how-to-detect-the-mobile-network-type-2g-3g-4g-5g-from-your-android-app-android-studio-complete-source-code/