Android Question Using Java code for the first time

[AHilberink]

Hi,

I have problems by using Java code for the first time. I don't know if it is my lack of knowledge or just not the right code.

I try:

Sub GetCountry As String
    Private NativeMe As JavaObject
   
    If(NativeMe.IsInitialized=False) Then NativeMe.InitializeContext
   
    Dim s As String = NativeMe.RunMethod("getUserCountry", Null)
    Log(s)
    Return s
   
#if Java
/**
* Get ISO 3166-1 alpha-2 country code for this device (or null if not available)
* @param context Context reference to get the TelephonyManager instance from
* @return country code or null
*/
public static String getUserCountry(Context context) {
    try {
        final TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
           final String simCountry = tm.getSimCountryIso();
           if (simCountry != null && simCountry.length() == 2) { // SIM country code is available
               return simCountry.toLowerCase(Locale.US);
           }
           else if (tm.getPhoneType() != TelephonyManager.PHONE_TYPE_CDMA) { // device is not 3G (would be unreliable)
            String networkCountry = tm.getNetworkCountryIso();
               if (networkCountry != null && networkCountry.length() == 2) { // network country code is available
                   return networkCountry.toLowerCase(Locale.US);
               }
           }
       }
       catch (Exception e) { }
       return null;
}
#End If
End Sub

This is the error during compile:
Compileren gegenereerde Java code. Error
src\ciris\chauffeur\main.java:1781: error: cannot find symbol
final TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
^
symbol: class TelephonyManager
location: class main
1 error

javac 11.0.1

Can somebody help me with this?

BR, André

 

[stevel05]

You need to import the required classes for the java code, and you need to pass the context to the called sub. Try this:

Sub GetCountry As String
    Private NativeMe As JavaObject
   
    NativeMe = NativeMe.InitializeContext
   
    Dim s As String = NativeMe.RunMethod("getUserCountry", Array(NativeMe))
    Log(s)
    Return s
End Sub
   
#if Java

import android.content.Context;
import android.telephony.TelephonyManager;
import java.util.Locale;

/**
* Get ISO 3166-1 alpha-2 country code for this device (or null if not available)
* @param context Context reference to get the TelephonyManager instance from
* @return country code or null
*/



public static String getUserCountry(Context context) {
    try {
        final TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
           final String simCountry = tm.getSimCountryIso();
           if (simCountry != null && simCountry.length() == 2) { // SIM country code is available
               return simCountry.toLowerCase(Locale.US);
           }
           else if (tm.getPhoneType() != TelephonyManager.PHONE_TYPE_CDMA) { // device is not 3G (would be unreliable)
            String networkCountry = tm.getNetworkCountryIso();
               if (networkCountry != null && networkCountry.length() == 2) { // network country code is available
                   return networkCountry.toLowerCase(Locale.US);
               }
           }
       }
       catch (Exception e) { }
       return null;
}
#End If

 

[AHilberink]

You need to import the required classes for the java code, and you need to pass the context to the called sub. Try this:

Sub GetCountry As String
    Private NativeMe As JavaObject
  
    NativeMe = NativeMe.InitializeContext
  
    Dim s As String = NativeMe.RunMethod("getUserCountry", Array(NativeMe))
    Log(s)
    Return s
End Sub
  
#if Java

import android.content.Context;
import android.telephony.TelephonyManager;
import java.util.Locale;

/**
* Get ISO 3166-1 alpha-2 country code for this device (or null if not available)
* @param context Context reference to get the TelephonyManager instance from
* @return country code or null
*/



public static String getUserCountry(Context context) {
    try {
        final TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
           final String simCountry = tm.getSimCountryIso();
           if (simCountry != null && simCountry.length() == 2) { // SIM country code is available
               return simCountry.toLowerCase(Locale.US);
           }
           else if (tm.getPhoneType() != TelephonyManager.PHONE_TYPE_CDMA) { // device is not 3G (would be unreliable)
            String networkCountry = tm.getNetworkCountryIso();
               if (networkCountry != null && networkCountry.length() == 2) { // network country code is available
                   return networkCountry.toLowerCase(Locale.US);
               }
           }
       }
       catch (Exception e) { }
       return null;
}
#End If

Thanks, Steve.

This is what I looked for.

BR, André